Flue gas desulfurization and demisting structure

Abstract

The utility model discloses a flue gas desulfurization demisting structure which comprises a circular support, a plurality of grids are arranged in the circular support, a plurality of washing nozzles are arranged at the upper ends of the grids, a plurality of mounting grooves are formed between the grids and the circular support, demisting wire meshes are embedded in the mounting grooves, and a draining assembly is arranged at the lower end of the circular support. The draining assembly comprises a draining ring and a plurality of water receiving boxes. The flushing device has the beneficial effects that the structure design that the circle center bracket, the grating and the flushing nozzles are communicated is adopted, so that the flushing device and the demister are integrated, the structure is optimized, sewage is collected through the water receiving box, the water diversion pipe and the water drainage pipe which are arranged at the lower end and is rapidly discharged out of the desulfurizing tower, the flushing efficiency is improved, and the operation of the desulfurizing tower is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization and demisting structure. Background Art

[0002] After the flue gas is desulfurized, there is a problem of high water content, because the wet spray nozzle will produce a large number of fine droplets, some of which will enter the desulfurization system, and a small number of fine droplets will be carried by the flue gas, causing gypsum rain. At the same time, extremely fine particles and water droplets with a density far greater than that of air are suspended and accumulated in the atmosphere to form fog. When soluble particles are precipitated in the thick fog, they slowly accumulate in the fog layer to form haze, which has an adverse effect on the environment. Therefore, it is necessary to use a demister to separate the gas and liquid before discharge.

[0003] The demister is mainly composed of corrugated blades, plates, strips and other fixing devices. In wet flue gas desulfurization, the absorption tower is prone to produce "fog" with a particle size of 10-60 microns during operation. The "fog" not only contains water, but also contains sulfuric acid, sulfate, sulfur dioxide, etc. It also causes contamination and serious corrosion of fans, heat exchangers and flues. Therefore, the wet flue gas desulfurization process requires demisting of the absorption equipment, and the purified gas must be demisted before leaving the absorption tower. The demister nozzle is one of the main components of the demisting system. The demister nozzle is mainly made of high-quality plastic, which has extremely high wear resistance and long service life.

[0004] At present, the most widely used demisters are usually flat-plate demisters. Although they are equipped with backwashing devices, they have complex structures and occupy space in the desulfurization tower. In addition, the wastewater generated after flushing cannot be collected, causing secondary pollution to the desulfurization tower and affecting the operation of the desulfurization system. Utility Model Content

[0005] The utility model aims to provide a flue gas desulfurization and demisting structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a flue gas desulfurization and demisting structure, comprising a circular bracket, a plurality of grilles are arranged inside the circular bracket, a plurality of flushing nozzles are arranged at the upper end of the grilles, a plurality of mounting grooves are arranged between the plurality of grilles and the circular bracket, a plurality of mounting grooves are each embedded with a defoaming screen, a drain assembly is arranged at the lower end of the circular bracket, and the drain assembly comprises a drain ring and a plurality of water receiving boxes.

[0008] Furthermore, a water receiving pipeline is provided between the circular bracket and the plurality of grilles, and a water inlet pipe connected to the water receiving pipeline is provided on one side of the circular bracket.

[0009] Furthermore, the water inlet pipe is connected to the plurality of flushing nozzles via a water connecting pipeline.

[0010] Furthermore, a plurality of the foam removing screens are matched and connected to the mounting grooves, and the lower ends of the foam removing screens are tapered.

[0011] Furthermore, the multiple water receiving boxes and the defoaming screen are arranged one by one, the water receiving boxes are penetrated by multiple water diversion pipes, both ends of the multiple water diversion pipes are connected to the drainage ring, and there is a certain gap between the water receiving boxes and the defoaming screen.

[0012] Furthermore, a drainage pipe is provided on one side of the drainage ring, and the drainage pipe is connected to the plurality of water diversion pipes.

[0013] Furthermore, the upper end of the drainage ring is fixedly connected to the circular bracket via a locking screw.

[0014] Beneficial effects: A flue gas desulfurization and demisting structure adopts a structural design in which a circular center bracket, a grille and a flushing nozzle are connected, so that the flushing device and the demister are integrated into one, the structure is optimized, and sewage is collected and quickly discharged from the desulfurization tower through a water receiving box, a water pipe and a drainage pipe installed at the lower end, thereby improving the flushing efficiency and avoiding affecting the operation of the desulfurization tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of the utility model.

[0017] Reference numerals

[0018] 1-circular bracket, 2-grid, 3-installation groove, 4-foam removal screen, 5-drain assembly, 6-drain ring, 7-water receiving box, 8-water inlet pipe, 9-flushing nozzle, 10-water diversion pipe, 11-drain pipe. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Example

[0021] like Figure 1-2As shown, a flue gas desulfurization and demisting structure includes a circular bracket 1, a plurality of grilles 2 are arranged inside the circular bracket 1, a plurality of flushing nozzles 9 are arranged at the upper end of the grilles 2, a plurality of mounting grooves 3 are arranged between the plurality of grilles 2 and the circular bracket 1, a plurality of mounting grooves 3 are each embedded with a defoaming screen 4, a drain assembly 5 is arranged at the lower end of the circular bracket 1, and the drain assembly 5 includes a drain ring 6 and a plurality of water receiving boxes 7.

[0022] A water receiving pipe is provided between the circular bracket 1 and the multiple grilles 2. A water inlet pipe 8 connected to the water receiving pipe is provided on one side of the circular bracket 1. The water inlet pipe 8 is connected to multiple flushing nozzles 9 through the water receiving pipe. The multiple flushing nozzles 9 have multi-directional spray holes. Water is received through the water inlet pipe 8 and flushed downward from the top of the defoaming screen 4 through the flushing nozzles 9.

[0023] A plurality of foam removing screens 4 are matched and connected with the mounting groove 3, and the lower end of the foam removing screens 4 is conical, and a plurality of water receiving boxes 7 are arranged one by one corresponding to the foam removing screens 4. The water flushed by the foam removing screens 4 is collected into water droplets through the conical lower end thereof, and the water receiving boxes 7 are mutually penetrated by a plurality of water guide pipes 10, and both ends of the plurality of water guide pipes 10 are connected with the drainage ring 6. There is a certain gap between the water receiving boxes 7 and the foam removing screens 4, and a drainage pipe 11 is provided on one side of the drainage ring 6, and the drainage pipe 11 is connected with a plurality of water guide pipes 10. The upper end of the drainage ring 6 is fixedly connected with the circular bracket 1 by a locking screw, and the water discharged from the foam removing screens 4 drops into the corresponding water receiving boxes 7. After the water receiving boxes 7 are connected with the drainage ring 6 through the water guide pipe 10, the water is discharged through the drainage pipe 11.

[0024] The demisting structure is installed in the desulfurization tower and is connected to the water inlet pipe 8 through an external water pump for water supply. In order to prevent the defoaming screen 4 from being blocked, after turning on the water pump, water is fed into each defoaming screen 4 through multiple flushing nozzles 9 for flushing. The flushed sewage flows out from the lower end of the defoaming screen 4. The conical bottom structure of the defoaming screen 4 can collect the sewage and flow it into the water receiving box 7. Multiple water receiving boxes 7 are connected to the water diversion pipe 10, and the sewage is discharged from the desulfurization tower through the water diversion pipe 10 and the drain pipe 11.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A flue gas desulfurization and demisting structure, characterized in that: The invention comprises a circular bracket (1), wherein a plurality of grilles (2) are arranged inside the circular bracket (1), a plurality of flushing nozzles (9) are arranged at the upper end of the grilles (2), a plurality of mounting grooves (3) are arranged between the plurality of grilles (2) and the circular bracket (1), a foam removal screen (4) is embedded in each of the plurality of mounting grooves (3), a drain assembly (5) is arranged at the lower end of the circular bracket (1), and the drain assembly (5) comprises a drain ring (6) and a plurality of water receiving boxes (7).

2. A flue gas desulfurization and demisting structure according to claim 1, characterized in that: A water receiving pipeline is provided between the circular support (1) and the plurality of grilles (2), and a water inlet pipe (8) connected to the water receiving pipeline is provided on one side of the circular support (1).

3. A flue gas desulfurization and demisting structure according to claim 2, characterized in that: The water inlet pipe (8) is connected to the plurality of flushing nozzles (9) via a water receiving pipeline.

4. A flue gas desulfurization and demisting structure according to claim 1, characterized in that: A plurality of the foam removal screens (4) are matched and connected to the installation grooves (3), and the lower ends of the foam removal screens (4) are tapered.

5. A flue gas desulfurization and demisting structure according to claim 1, characterized in that: The plurality of water receiving boxes (7) and the foam removing screen (4) are arranged in one-to-one correspondence, the water receiving boxes (7) are penetrated by a plurality of water guide pipes (10), both ends of the plurality of water guide pipes (10) are connected to the drainage ring (6), and there is a certain gap between the water receiving boxes (7) and the foam removing screen (4).

6. A flue gas desulfurization and demisting structure according to claim 5, characterized in that: A drainage pipe (11) is provided on one side of the drainage ring (6), and the drainage pipe (11) is connected to the plurality of water diversion pipes (10).

7. A flue gas desulfurization and demisting structure according to claim 1, characterized in that: The upper end of the drainage ring (6) is fixedly connected to the circular bracket (1) via locking screws.

Images