CN221062251U

CN221062251U - Ultra-low emission efficient desulfurizing tower

Info

Publication number: CN221062251U
Application number: CN202323055923.0U
Authority: CN
Inventors: 刘正东; 周琼波; 杨雄俊; 胡垒; 周鑫; 饶文金; 李键; 张晓艺; 何伟富
Original assignee: Yunnan Phosphate Chemical Group Corp Ltd
Current assignee: Yunnan Phosphate Chemical Group Corp Ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-06-04
Anticipated expiration: 2033-11-13

Abstract

The utility model relates to the technical field of desulfurizing towers, in particular to an ultra-low emission efficient desulfurizing tower, which comprises a tower body, wherein a washing cooling area is arranged below the inner part of the tower body, a mist removing area is arranged above the tower body, a stirring device is arranged at the lower part of the washing cooling area, a plurality of spray heads are arranged in the middle of the washing cooling area, each spray head comprises a first-stage spray head positioned at the lower part and a second-stage spray head positioned at the upper part, three groups of air lifting hoods are arranged in the washing cooling area, the ultra-low emission efficient desulfurizing tower further comprises a first corrugated filler and a second corrugated filler, a first water separator is arranged at the upper part of the first corrugated filler, a second water separator is arranged at the upper part of the second corrugated filler, and at least three groups of ridge mist removing devices are arranged below the inner part of the mist removing area. In the ultra-low emission high-efficiency desulfurizing tower, the stirring device is arranged at the bottom of the desulfurizing tower, so that the solid phase at the bottom can not be deposited, and the pipeline is blocked. The spray head is provided with a plurality of layers, so that atomized washing liquid is ensured to cover the section of the whole tower body, and the desulfurization efficiency is further improved.

Description

Ultra-low emission efficient desulfurizing tower

Technical Field

The utility model relates to the technical field of desulfurizing towers, in particular to an ultra-low emission efficient desulfurizing tower.

Background

In the production of sulfuric acid, the absorbed sulfur-containing tail gas is directly discharged into the atmosphere, and if the content of sulfur dioxide and acid mist in the tail gas is high, the emission standard is possibly exceeded, and certain influence is caused on the air quality and the surrounding air environment. Along with the increasing requirements of the state on environmental protection, the tail gas emission index is continuously downwards regulated from original 960mg/m ³,860mg/m³ to 400mg/m ³, and then the tail gas emission index can be lower to reach 200mg/m ³, so that the standard emission of the tail gas is difficult to ensure by only using a catalyst with high quality performance to improve the conversion rate, the tail gas to be emitted needs to be desulfurized and washed, and a desulfurizing tower with higher washing efficiency needs to be used for ensuring a lower emission value in the emitted tail gas. Desulfurizing towers are one of the important devices for treating sulfur-containing gases in the industrial field. In the fields of thermal power generation, petrochemical industry, steel smelting and the like, the emission of sulfur-containing gas not only pollutes the environment, but also can cause corrosion and damage to equipment. Thus, the treatment and purification of sulfur-containing gases is a problem that these industries must face.

There are some problems with the existing desulfurizing towers. Firstly, the cooling effect of the washing cooling area is not ideal enough, so that fog drops in the defogging area are seriously carried with water, and the desulfurization effect is influenced. Secondly, the shower nozzle in washing cooling district is easy to block up, leads to shower nozzle flow inhomogeneous, influences the washing effect. In addition, the flushing device of ridge defroster and wire mesh defroster is not perfect enough, easily causes the defroster to block up, influences desulfurization effect.

Disclosure of utility model

The utility model aims to provide an ultra-low emission high-efficiency desulfurizing tower so as to solve the problems that in the background technology, the cooling effect of a washing cooling area is not ideal enough, and fog drops in a defogging area are seriously carried with water, so that the desulfurizing effect is influenced. Secondly, the shower nozzle in washing cooling district is easy to block up, leads to shower nozzle flow inhomogeneous, influences the washing effect. In addition, the washing unit of ridge defroster and wire mesh defroster is not perfect enough, easily causes the defroster to block up, influences the problem of desulfurization effect.

In order to achieve the above purpose, the utility model provides an ultra-low emission efficient desulfurizing tower, which comprises a tower body, wherein a washing cooling area is arranged below the inner part of the tower body, a mist removing area is arranged above the tower body, a stirring device is arranged below the washing cooling area, a plurality of spray heads are arranged in the middle of the washing cooling area, each spray head comprises a first-stage spray head positioned at the lower part and a second-stage spray head positioned at the upper part, three groups of air lifting hoods are arranged in the washing cooling area, a first corrugated filler and a second corrugated filler are further arranged in the washing cooling area, a first water separator is arranged at the upper part of the first corrugated filler, a second water separator is arranged at the upper part of the second corrugated filler, at least three groups of ridge mist eliminators are arranged below the inner part of the mist removing area, a wire mesh mist eliminator is arranged above the inner part of the mist removing area, and an exhaust port is arranged at the top of the tower body.

Preferably, the number of the first-stage spray heads is not less than three, the number of the second-stage spray heads is not less than two, and the synergistic ring is arranged below the second-stage spray heads.

Preferably, the synergistic ring is of an annular structure, the outer wall is attached to the inner wall of the tower body, and the top surface is an inclined surface.

Preferably, the stirring device comprises a fixed groove, a rotating shaft is arranged in the fixed groove, one end of the rotating shaft is driven to rotate by a driving motor, a plurality of first bevel gears are arranged on the rotating shaft, a plurality of stirring rods are vertically arranged on the upper portion of the rotating shaft, a plurality of stirring blades are arranged on the outer side of each stirring rod, a fixing frame is arranged at the top of each stirring rod, two ends of each fixing frame are arranged on the inner wall of the tower body, the bottom of each fixing frame is rotationally connected with the top of each stirring rod through a bearing, and a second bevel gear is arranged at the bottom end of each stirring rod and meshed with the corresponding first bevel gear.

Preferably, one group of the gas raising covers is located at the upper part of the first-stage spray head, and the other two groups of the gas raising covers are respectively located at the lower parts of the first corrugated packing and the second corrugated packing.

Preferably, a first flushing device is arranged at the upper part of the ridge demister, and a second flushing device is arranged at the upper part of the wire mesh demister.

Preferably, a flushing water return port is arranged at the position, close to the upper part, of the outer wall of the tower body, a circulating washing water return port is arranged at the position, close to the middle part, of the gas lift cover, and an oxidation absorption liquid return port is arranged at the position, close to the lower part, of the outer wall of the tower body.

Preferably, the lower outer wall of the tower body is also provided with an oxidation absorption liquid supplementing inlet, a gas inlet and an absorption liquid supplementing inlet, and the bottom side wall of the tower body is provided with an absorption liquid outlet, a stirring liquid outlet and a saturated absorption liquid outlet.

Compared with the prior art, the utility model has the beneficial effects that:

In the ultra-low emission high-efficiency desulfurizing tower, the stirring device is arranged at the bottom of the desulfurizing tower, so that the solid phase at the bottom can not be deposited, and the pipeline is blocked. The spray head is provided with a plurality of layers, so that atomized washing liquid is ensured to cover the section of the whole tower body, and the desulfurization efficiency is further improved. The synergistic plate is arranged, so that washing tail gas can be prevented from influencing the exertion of washing absorption functions due to short circuit while washing liquid is used for washing the tower wall, and the flushing devices of the ridge demister and the silk screen demister are perfect in design and can effectively prevent the demister from being blocked.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic structural view of a stirring device according to the present utility model;

FIG. 3 is a schematic structural view of the synergistic ring of the present utility model.

The meaning of each reference sign in the figure is:

1. A tower body; 2. a stirring device; 201. a fixing groove; 202. a rotating shaft; 203. a driving motor; 204. a first bevel gear; 205. a second bevel gear; 206. a stirring rod; 207. stirring blades; 208. a fixing frame; 3. a first-stage spray head; 4. a lift hood; 5. a synergistic ring; 6. a secondary nozzle; 7. a first corrugated filler; 8. a first water separator; 9. a second corrugated filler; 10. a second water separator; 11. a ridge demister; 12. a first flushing device; 13. a wire mesh mist eliminator; 14. a second flushing device; 15. an exhaust port; 16. a flushing water return port; 17. circulating washing water return port; 18. an oxidation absorption liquid supplementing port; 19. an oxidation absorption liquid reflux port; 20. a gas inlet; 21. an absorption liquid supplementing port; 22. an absorption liquid outlet; 23. a stirring liquid outlet; 24. saturated absorption liquid outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides an ultra-low emission high-efficiency desulfurizing tower, as shown in figures 1-3, which comprises a tower body 1, wherein a washing cooling area is arranged below the inside of the tower body 1, a demisting area is arranged above the washing cooling area, a stirring device 2 is arranged at the lower part of the washing cooling area and used for stirring the bottom of the entering tower body 1, so that solid matters do not deposit to cause pipeline blockage, a plurality of spray heads are arranged in the middle of the washing cooling area, the spray heads comprise a first-stage spray head 3 positioned at the lower part and a second-stage spray head 6 positioned at the upper part and are used for spraying and flushing, three groups of gas lifting hoods 4 are arranged in the washing cooling area, the washing cooling area also comprises a first corrugated packing 7 and a second corrugated packing 9 and used for absorbing the thermal deformation amount generated by temperature change of equipment, the first corrugated packing 7 is also used for noise reduction and vibration reduction, a first water separator 8 is arranged at the upper part of the first corrugated packing 7, a second water separator 10 is arranged at the upper part of the second corrugated packing 9, no less than three groups of ridge demisters 11 are arranged below the inside the demister, a demister 13 is arranged above the inside of the demister area, three groups of gas lifting hoods 13 are arranged above the inside the demister, and the demister 13 is arranged at the top of the tower body 1, and the demister is effectively used for preventing the demister from being blocked by mass transfer.

In this embodiment, the number of the first-stage spray heads 3 is not less than three, the number of the second-stage spray heads 6 is not less than two, and the synergistic ring 5 is installed below the second-stage spray heads 6.

Specifically, the synergistic ring 5 is annular structure, and the outer wall laminating is at the inner wall of tower body 1, and the top surface is the inclined plane for spray water can not flow along tower body 1 inner wall, avoids causing the corruption to tower body 1.

Further, agitating unit 2 includes fixed slot 201, the inside of fixed slot 201 is provided with pivot 202, the one end of pivot 202 passes through driving motor 203 drive and rotates, install a plurality of first bevel gears 204 on the pivot 202, the upper portion of pivot 202 is vertical to be provided with a plurality of puddler 206, a plurality of stirring vane 207 are installed in the outside of puddler 206, mount 208 is installed at the top of puddler 206, the inner wall at tower 1 is installed at the both ends of mount 208, the bottom of mount 208 is rotated through the top of bearing and puddler 206 and is connected, second bevel gear 205 is installed to the bottom of puddler 206, second bevel gear 205 meshes with first bevel gear 204, make tower 1 bottom intensive mixing through agitating unit 2's work, avoid the jam.

Further, one set of gas-lifting hoods 4 is located at the upper part of the first-stage spray head 3, and the other two sets of gas-lifting hoods 4 are respectively located at the lower parts of the first corrugated packing 7 and the second corrugated packing 9.

Further, the first flushing device 12 is installed on the upper portion of the ridge demister 11, the second flushing device 14 is installed on the upper portion of the wire mesh demister 13 and used for flushing gas, the first flushing device 12 and the second flushing device 14 are composed of annular water pipes and spray heads, water is sprayed out of the spray heads on the annular water pipes through the water pumps, the first flushing device 12 flushes the ridge demister 11, and the second flushing device 14 flushes the wire mesh demister 13.

Further, a flushing water return port 16 is arranged at the position, close to the upper part, of the outer wall of the tower body 1, of the gas lift cover 4, a circulating washing water return port 17 is arranged at the position, close to the middle part, of the outer wall of the tower body 1, of the gas lift cover 4, and an oxidation absorption liquid return port 19 is arranged at the position, close to the lower part, of the outer wall of the tower body 1.

Further, the lower outer wall of the tower body 1 is also provided with an oxidation absorption liquid supplementing inlet 18, a gas inlet 20 and an absorption liquid supplementing inlet 21, and the bottom side wall of the tower body 1 is provided with an absorption liquid outlet 22, a stirring liquid outlet 23 and a saturated absorption liquid outlet 24.

When the ultra-low emission high-efficiency desulfurizing tower is used, sulfur-containing tail gas enters the desulfurizing tower from a gas inlet 20, an exhaust port 15 is communicated with a chimney through a pipeline, a stirring liquid outlet 23 is connected with a stirring pump inlet through a pipeline, a stirring pump outlet is connected with a stirring device 2 through a pipeline, circulating absorption liquid enters a circulating pump through an absorption liquid outlet 22, the circulating pump outlet enters a first-stage spray head 3 through a pipeline, an oxidation absorption liquid reflux port 19 enters an oxidation tank through a pipeline, an oxidation tank outlet is connected with an oxidation circulating pump, an oxidation circulating pump outlet respectively enters a second-stage spray head 6 and an absorption liquid supplementing inlet 21, a circulating washing water reflux port 17 is connected with a first-stage circulating water tank and an oxidation absorption liquid supplementing inlet 18 through a pipeline, a first-stage circulating water tank outlet is connected with a first-stage circulating pump, and a first-stage circulating pump outlet is connected with a first water distributor 8 through a pipeline. The flushing water reflux port 16 enters a secondary circulating water tank through a pipeline, the outlet of the secondary circulating water tank is connected with a secondary circulating pump, the outlet of the secondary circulating water tank is connected with the second water separator 10 and the primary circulating water tank through a pipeline, the process water is directly connected with the first flushing device 12 through a pipeline, the treated process water is connected with the second flushing device 14 through a washing pump outlet, the saturated absorption liquid outlet is connected with a crystal liquid pump inlet through a pipeline, and the outlet of the crystal liquid pump is connected with a cyclone inlet through a pipeline.

The tower body 1 is divided into four sections by the gas lift cover 4 to form four functional sections of concentration absorption, oxidation absorption, water washing absorption and combined demisting.

The stirring device 2 is arranged below the liquid surface at the lower part of the tower body 1 and is fixed at the bottom of the tower through a bracket.

It should be noted that the concentration absorption section is an empty tower, the first-stage spray heads 3 are arranged in layers, the number of each layer is not less than 3, the number of each layer is not less than 4, the first-stage spray heads 3 on the same layer are annularly and uniformly distributed, and the spray heads 3 on the adjacent layers are arranged in a staggered manner. The oxidation absorption section is an empty tower, the number of the two-stage spray heads 6 is not less than two, each layer is not less than 4, the two-stage spray heads 6 on the same layer are annularly and uniformly distributed, and the two-stage spray heads 6 on the adjacent layers are arranged in a staggered mode. The lower part of each layer of spray heads of the secondary spray heads 6 is respectively provided with a circle of synergistic ring 5, and the synergistic rings 5 are fixed on the tower wall. The combined demister section is provided with at least three layers of ridge demisters 11 and one layer of wire mesh demisters 13, and the wire mesh demisters 13 are arranged on the upper portion of the tower body 1. The washing water of the wire mist eliminator 13 uses process water subjected to algae removal filtration treatment.

In the actual production process, an ammonia tail sulfur eluting process is adopted, the total height of the tower body 1 is 39 meters, and the tower body is divided into four sections by the gas raising cover 4, so that four functional sections of concentration absorption, oxidation absorption, water washing absorption and combined demisting are formed. The sulfur-containing tail gas enters the desulfurizing tower from the gas inlet 20, the circulating absorption liquid enters the circulating pump from the absorption liquid outlet 22 and is respectively sent into the three-layer first-stage spray head 3 for atomization spraying, the gas phase temperature after washing is reduced, the liquid concentration is improved, and when the specified circulating concentration is reached, part of the circulating absorption liquid is pumped out to the centrifugal device through the crystal liquid pump for separation, and then the ammonium sulfate product is obtained. The tail gas after concentration, washing and absorption enters an oxidation absorption section, oxidation absorption liquid is connected with an oxidation circulating pump from an oxidation tank outlet, most of the oxidation circulating pump enters a three-layer secondary spray head 6 through a pipeline and then is atomized and sprayed out, the gas is subjected to countercurrent washing, and a small amount of the gas enters an absorption liquid supplementing inlet 21 to supplement the circulating absorption liquid. The washed oxidation absorption liquid reflux port 19 enters an oxidation tank through a pipeline, and air is introduced into the tank for oxidation. The washed gas upwards enters a primary water washing absorption section, primary circulating water is connected with a primary circulating pump from a primary circulating water tank outlet, the primary circulating pump outlet is connected with a first water separator 8 through a pipeline, circulating water fully contacts with the gas in the first water separator 8, the washed gas upwards enters a secondary water washing section, and the washed water enters the primary circulating water tank and an oxidation absorption liquid supplementing inlet 18 from a circulating washing water backflow port 17 through a pipeline to be supplemented into oxidation absorption liquid. The secondary circulating water enters a secondary circulating pump from the outlet of the secondary circulating water tank, most of liquid phase at the outlet of the secondary circulating pump enters the second water separator 10 to be fully contacted with gas for washing, and the other part of liquid phase enters the primary circulating water tank, and the washed liquid phase enters the secondary circulating water tank through a flushing water return port 16 and a pipeline. The process water directly enters the first flushing device 12 of the two-layer ridge demister 11 through a process water pipeline to flush the demister, and the processed process water enters the second flushing device 14 through a washing pump outlet to clean the wire mesh demister 13. Clean tail gas after washing and demisting enters the pipeline from the exhaust port 15 and is discharged through a chimney after reaching standards.

Finally, it should be noted that, in the stirring device 2, the flushing device and the like in this embodiment, the electronic components in the above components are all universal standard components or components known to those skilled in the art, the structure and principle thereof are all known to those skilled in the art through technical manuals or through routine experiment methods, all the above electrical components are connected through wires at the idle position of the device, and the specific connection means should refer to the sequential working order among the electrical components in the working principle to complete the electrical connection, which is known in the art.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An ultra-low emission high-efficiency desulfurizing tower comprises a tower body (1), and is characterized in that: the inside below of tower body (1) is provided with washing cooling district, and the top is provided with the defogging district, and agitating unit (2) are installed to the lower part in washing cooling district, and the mid-mounting in washing cooling district has a plurality of shower nozzles, and the shower nozzle is including being located one-level shower nozzle (3) of lower part and being located second shower nozzle (6) on upper portion, installs three group's gas hood (4) in the washing cooling district, still includes first ripple packing (7) and second ripple packing (9), first water knockout ware (8) are installed on the upper portion of first ripple packing (7), second water knockout ware (10) are installed on the upper portion of second ripple packing (9), and be not less than three group's room ridge defroster (11) are installed to the inside below in defogging district, silk screen mist eliminator (13) are installed to the inside top in defogging district, the top of tower body (1) is provided with gas vent (15).

2. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: the number of the first-stage spray heads (3) is not less than three groups, the number of the second-stage spray heads (6) is not less than two groups, and a synergy ring (5) is arranged below the second-stage spray heads (6).

3. The ultra-low emission high efficiency desulfurizing tower according to claim 2, wherein: the synergistic ring (5) is of an annular structure, the outer wall of the synergistic ring is attached to the inner wall of the tower body (1), and the top surface of the synergistic ring is an inclined surface.

4. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: stirring device (2) are including fixed slot (201), the inside of fixed slot (201) is provided with pivot (202), the one end of pivot (202) is passed through driving motor (203) drive and is rotated, install a plurality of first bevel gears (204) on pivot (202), the upper portion of pivot (202) is vertical to be provided with a plurality of puddler (206), a plurality of stirring vane (207) are installed in the outside of puddler (206), mount (208) are installed at the top of puddler (206), the inner wall at tower body (1) is installed at the both ends of mount (208), the bottom of mount (208) is passed through the top rotation of bearing and puddler (206) and is connected, second bevel gear (205) are installed to the bottom of puddler (206), second bevel gear (205) and first bevel gear (204) meshing.

5. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: one group of the air lifting covers (4) are positioned at the upper part of the first-stage spray head (3), and the other two groups of the air lifting covers (4) are respectively positioned at the lower parts of the first corrugated packing (7) and the second corrugated packing (9).

6. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: the upper part of the ridge demister (11) is provided with a first flushing device (12), and the upper part of the wire mesh demister (13) is provided with a second flushing device (14).

7. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: the tower body (1) is characterized in that a flushing water reflux port (16) is formed in the position, close to the upper portion, of the outer wall of the tower body (1) and close to the air lift cover (4) in the middle of the tower body, a circulating washing water reflux port (17) is formed in the position, close to the lower portion, of the outer wall of the tower body (1) and close to the air lift cover (4) in the lower portion, and an oxidation absorption liquid reflux port (19) is formed in the position.

8. The ultra-low emission high efficiency desulfurizing tower according to claim 1, wherein: the lower part outer wall of tower body (1) still is provided with oxidation absorption liquid benefit entry (18), gas inlet (20) and absorption liquid benefit entry (21), the bottom lateral wall of tower body (1) is provided with absorption liquid export (22), stirring liquid export (23) and saturated absorption liquid export (24).