A demisting and re-emission system for a graphitization furnace

Abstract

This application discloses a demisting and re-emission system for a graphitization furnace, including an installation plate installed inside an absorption tower. The installation plate has multiple openings, at which demisting modules are installed. A support is provided between two adjacent demisting modules, and an upper spray pipe is installed on the support. A lower spray pipe is provided below each demisting module. Both the upper and lower spray pipes are connected to a pressure tank via solenoid valves. This application improves the rinsing quality and reduces water consumption by treating the ridge demisting. Simultaneously, the demisting plate is modularly designed, and the pipeline position does not affect the disassembly of the demisting modules. When scale forms on the demisting modules, they can be directly disassembled and replaced for external cleaning, minimizing the impact on production. This achieves demisting and re-emission treatment for the graphitization furnace.

Description

Technical Field

[0001] This utility model relates to the field of graphitization furnace emission technology, and in particular to a graphitization furnace demisting and re-emission system. Background Technology

[0002] As an important industrial production equipment, the concentration of pollutants such as particulate matter and sulfur dioxide in the exhaust gas of graphitization furnaces has long been a focus of environmental protection supervision. Therefore, the flue gas emitted by graphitization furnaces must be treated before it can be discharged. The common method is to treat it through an absorption tower and a slurry spraying system. During the treatment process, the water content of the exhaust gas increases, and the requirement is that the water content of the outlet flue gas should not exceed 75 mg / Nm3 (dry basis). Therefore, a demister is installed in the absorption tower to reduce the water content.

[0003] Demisters are installed on the upper part of the absorption tower or on the flue at the absorption tower outlet to separate entrained mist droplets. Among them, the ridge demister has a large contact area and good demisting effect, making it the best demisting method. After installation, it can achieve the corresponding indicators. However, compared with traditional demisting methods, the water vapor treated by the graphitization furnace still contains a certain amount of gypsum. The large contact area will actually produce a lot of scale, which usually requires a lot of water to keep flushing. This method results in excessive water consumption, which increases the water consumption and subsequent water treatment. In addition, the structure is difficult to maintain, reduces demisting performance, and increases production costs. Therefore, we propose a graphitization furnace demisting and re-emission system to solve the above problems. Utility Model Content

[0004] This application provides a demisting and re-emission system for graphitization furnaces, which solves the problems of large water consumption, easy scaling and difficulty in cleaning caused by using roof demisting systems for graphitization furnace emissions.

[0005] This application provides a demisting and re-emission system for a graphitization furnace, including an installation plate installed inside an absorption tower. The installation plate has multiple openings, at which demisting modules are installed. A support is provided between two adjacent demisting modules, and an upper spray pipe is installed on the support. A lower spray pipe is provided below each demisting module. Both the upper and lower spray pipes are connected to a pressure tank via solenoid valves.

[0006] Preferably, the defogging module includes a triangular mounting bracket, wherein a defogging plate is disposed between the two sides of the mounting bracket, and a tensioning mechanism is provided at both ends of the mounting bracket.

[0007] Preferably, the mounting bracket is a C-shaped steel.

[0008] Preferably, the tensioning mechanism includes tensioning screws disposed at both ends of the mounting frame, with two tensioning screws at each end, and the tensioning screws of two adjacent mounting frames are connected by hexagonal support columns.

[0009] Preferably, a positioning plate is also provided at the opening.

[0010] Preferably, the demister plate is coated with a hydrophobic material.

[0011] Preferably, the openings are in four columns, with two defogging modules installed in the middle opening.

[0012] Preferably, the top of the absorption tower is provided with a variable diameter end, and the mounting plate is located below the variable diameter end.

[0013] Preferably, a nozzle corresponding to the demisting module is provided between the upper spray pipe and the lower spray pipe.

[0014] Preferably, the mounting plate may have multiple layers.

[0015] As can be seen from the above technical solution, this application provides a graphitization furnace demisting and re-emission system. In use, the system is installed inside the absorption tower. The flue gas absorbed by the desulfurization process carries water mist upwards. When passing through the mounting plate, the water mist gathers at the opening, allowing for some water vapor to settle. Then, the flue gas passes through the opening and the demisting plate, where it further condenses due to aggregation, reversal, and collision, dripping downwards from the demisting plate. During this process, the upper and lower spray pipes are adjusted by solenoid valves to alternately spray water, which not only condenses the water vapor but also washes the demisting plate. A 15-30 second interval is set during the water spraying process. When the demisting plate's structure affects normal demisting, the corresponding demisting module can be removed and replaced with a spare. Simultaneously, the demisting module with the structural defects is cleaned and kept as a backup.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. With modular defogging modules, when scaling occurs, the corresponding module can be removed and replaced with a spare, which has minimal impact on production. At the same time, the modules further reduce size requirements, making it easier to clean the scaling.

[0018] 2. By setting up upper and lower spray pipes, dual cleaning from top to bottom is achieved, with staggered intermittent spraying. The spraying is pressurized to reduce water consumption, and the upper spray pipe does not affect the normal disassembly of the demisting module.

[0019] In summary, this application improves the quality of rinsing and reduces water consumption by treating the ridge demisting. At the same time, the demisting plate is modularly designed, and the position of the pipeline does not affect the disassembly of the demisting module. If the demisting module becomes scaled, it can be directly disassembled and replaced for external cleaning, reducing the impact on production. Thus, the demisting and re-emission treatment of the graphitization furnace is realized. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the installation structure of a demisting and re-emission system for a graphitization furnace proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of a demisting and re-emission system for a graphitization furnace proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the control structure of a demisting and re-emission system for a graphitization furnace proposed in this utility model.

[0024] Figure 4 This is an enlarged view of section A of the demisting and re-emission system for a graphitization furnace proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the tensioning mechanism structure of the demisting and re-emission system for a graphitization furnace proposed in this utility model.

[0026] In the diagram: 1 Absorption tower, 2 Variable diameter end, 3 Mounting plate, 4 Opening, 5 Demisting module, 51 Mounting bracket, 52 Demisting plate, 53 Positioning plate, 54 Tensioning mechanism, 541 Tensioning screw, 542 Hexagonal support column, 6 Bracket, 7 Upper spray pipe, 8 Lower spray pipe, 9 Solenoid valve, 10 Pressurization tank, 11 Sprayer head. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0028] See Figure 1-5A demisting and re-emission system for a graphitization furnace includes an installation plate 3 installed inside an absorption tower 1. The installation plate 3 is installed inside the absorption tower 1 via a steel frame structure. The installation plate 3 has multiple openings 4, at which demisting modules 5 are installed. The openings 4 are matched to the dimensions of the demisting modules 5, and their dimensions are integer multiples of the installation dimensions of the demisting modules 5. This modular installation allows for rapid disassembly; after scaling, the modules can be quickly disassembled and replaced for external cleaning. The demisting module 5 has an isosceles triangle cross-section, with its base length either greater than or less than its height. When multiple layers are installed, one upper-layer demisting module 5 can be removed to replace the lower-layer modules. The removed demisting module 5 is moved out through the space of an upper-layer demisting module 5. A support 6 is provided between two adjacent demisting modules 5. During this process, the disassembly of the demisting module 5 is not affected. An upper spray pipe 7 is installed on the bracket 6, and a lower spray pipe 8 is installed below each demisting module 5. A nozzle 11 corresponding to the demisting module 5 is installed between the upper spray pipe 7 and the lower spray pipe 8 to spray the upper and lower surfaces of the demisting module 5. Specifically, the upper spray pipe 7 and the lower spray pipe 8 are connected to the pressure tank 10 through a solenoid valve 9. During spraying, after the water enters the pressure tank 10 and the pressure is stabilized, the demisting module 5 is sprayed first through the upper spray pipe 7 or the lower spray pipe 8. Then, after an interval of 15-30 seconds, the other spray pipe is started. This design can improve the cleaning quality while greatly saving water. Compared with ordinary drip cleaning, the cleaning effect is better and less water is used. It can be used for more than 3 months in the emission system of the graphitization furnace, achieving emission while reducing the maintenance frequency.

[0029] In this utility model, the demisting module 5 includes a triangular mounting bracket 51, which is a C-shaped steel. Three mounting brackets 51 are arranged in parallel to form a support with a triangular cross-section. The top mounting bracket 51 consists of two C-shaped steels back to back, which are fixed by welding or bolts. A demisting plate 52 is provided between the mounting brackets 51 on both sides. A support rod is provided on the side where the demisting plate 52 is not installed, which corresponds to the opening 4. Tensioning mechanisms 54 are provided at both ends of the mounting bracket 51 to fix the mounting bracket 51 together and facilitate disassembly and cleaning. Furthermore, in order to reduce scaling, the demisting plate 52 is coated with a hydrophobic material, which can effectively improve the fluidity of droplets, reduce dripping, and thus reduce scaling.

[0030] In this utility model, the tensioning mechanism 54 includes tensioning screws 541 disposed at both ends of the mounting bracket 51. One end of the tensioning screw 541 is provided with a ring and is installed on one side of the mounting bracket 51 by screws. The tensioning screw 541 can rotate with the screw as the center. There are two tensioning screws 541 at each end. The tensioning screws 541 extend the sides of the triangular cross section. The tensioning screws 541 of two adjacent mounting brackets 51 are connected by a hexagonal support column 542. The hexagonal support column 542 is provided with screw holes corresponding to the tensioning screws 541. By rotating the hexagonal support column 542, the two tensioning screws 541 can be loosened or tightened, thereby achieving the purpose of fastening or opening the mounting bracket 51, which is convenient to operate.

[0031] In this utility model, in order to facilitate the installation of the defogging module 5, a positioning plate 53 is also provided at the opening 4. When installing the defogging module 5, it can be installed between the positioning plates and then fixed with bolts.

[0032] In this utility model, the opening 4 is in four rows, with the middle opening 4 having twice the number of installation positions as the outermost ones. Specifically, one defogging module 5 is installed on the side, and two defogging modules 5 are installed in the middle, which can achieve a larger area of ​​installation and also facilitates disassembly after multiple layers.

[0033] In this invention, the top of the absorption tower 1 is provided with a variable diameter end 2, which can further compress the flue gas, thereby causing the water vapor in it to condense. Therefore, the mounting plate 3 is located below the variable diameter end 2, which improves the water vapor condensation efficiency and further improves the demisting effect.

[0034] In this invention, when the demisting effect is poor, the mounting plate 3 can be set with multiple layers to further improve the demisting effect. The preferred design is a two-layer design, which can fully meet the requirement that the moisture content of the outlet flue gas is no more than 75 mg / Nm3 dry basis, and is also easy to disassemble.

[0035] As can be seen from the above technical solution, when this application is in use, the flue gas installed in the absorption tower 1, after being desulfurized and absorbed, will carry water mist upwards. When it passes through the mounting plate 3, it will collect at the opening 4. At this time, the water vapor can be gathered and settled to a certain extent. Then, the flue gas passes through the opening 4 and the demister plate 52. The flue gas is further gathered, redirected and collided and condensed, dripping down from the demister plate 52. During this process, the upper spray pipe 7 and the lower spray pipe 8 are adjusted by the solenoid valve 9 to spray water alternately. This can not only condense the water vapor, but also wash the demister plate 52 to a certain extent. An interval of 15-30 seconds is set during the water spraying process. When the demister plate 52 is structurally affected and cannot be demisted normally, the corresponding demister module 5 can be removed and replaced with a spare. At the same time, the demister module 5 is cleaned and can be used as a spare.

[0036] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0037] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A demisting re-emission system of a graphitization furnace comprising a mounting plate (3) installed inside an absorption tower (1), characterized in that: The mounting plate (3) has multiple openings (4), and a defogging module (5) is installed at the opening (4). A bracket (6) is provided between two adjacent defogging modules (5), and an upper spray pipe (7) is installed on the bracket (6). A lower spray pipe (8) is provided below each defogging module (5). The upper spray pipe (7) and the lower spray pipe (8) are both connected to the pressure tank (10) through a solenoid valve (9).

2. A mist removal and re-venting system for a graphitization furnace as defined in claim 1, wherein The defogging module (5) includes a triangular mounting bracket (51) with a defogging plate (52) between the two mounting brackets (51) on both sides and a tensioning mechanism (54) at both ends of the mounting bracket (51).

3. A mist removal and re-venting system for a graphitization furnace as defined in claim 2, wherein, The mounting bracket (51) is a C-shaped steel.

4. A mist removal and re-venting system for a graphitization furnace as defined in claim 3 wherein, The tensioning mechanism (54) includes tensioning screws (541) disposed at both ends of the mounting bracket (51), with two tensioning screws (541) at each end, and the tensioning screws (541) of two adjacent mounting brackets (51) are connected by hexagonal support columns (542).

5. A mist removal and re-venting system for a graphitization furnace as defined in claim 2 wherein, A positioning plate (53) is also provided at the opening (4).

6. A mist elimination and re-venting system for a graphitization furnace as defined in claim 2, wherein, The demister plate (52) is coated with a hydrophobic material.

7. A mist elimination and re-venting system for a graphitization furnace as defined in claim 1 wherein, The opening (4) is in four columns, with two defogging modules (5) installed in the middle opening (4).

8. The graphitization furnace demisting and re-emission system according to claim 1, characterized in that, The top of the absorption tower (1) is provided with a variable diameter end (2), and the mounting plate (3) is located below the variable diameter end (2).

9. A mist elimination and re-venting system for a graphitization furnace as defined in claim 1 wherein, A nozzle (11) corresponding to the demisting module (5) is provided between the upper spray pipe (7) and the lower spray pipe (8).

10. A mist elimination and re-venting system for a graphitization furnace as defined in claim 1, wherein, The mounting plate (3) can be configured with multiple layers.

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