CN209997447U

CN209997447U - flue gas desulfurization haze reduction tower

Info

Publication number: CN209997447U
Application number: CN201822195258.8U
Authority: CN
Inventors: 刘明; 刘森
Original assignee: Shandong Normal University
Current assignee: Shandong Normal University
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-01-31
Anticipated expiration: 2028-12-26

Abstract

The utility model discloses a flue gas desulfurization subtracts haze tower, including tower shell and inside subassembly, the tower body divide into the pars desulfurae and subtract two parts about the haze portion by the baffle, from bottom to top in the tower shell of pars desulfurae, be slurry district in proper order, admit air district and desulfurization district, slurry district, admit air district and desulfurization district communicate with each other, subtract inside from bottom to top of haze portion tower shell and arrange district and washing district for the trachea in proper order, the flue gas can desulfurization and flue gas dust removal purification technology in the haze tower is subtracted in the desulfurization, reach the desulfurization and subtract the haze purpose, accomplish clean emission.

Description

flue gas desulfurization haze reduction tower

Technical Field

The invention relates to the technical field of flue gas purification equipment, in particular to an flue gas desulfurization haze reduction tower.

Background

The existing flue gas desulfurization methods mainly comprise a wet desulfurization method and a dry desulfurization method, wherein the wet desulfurization method mainly adopts a limestone-gypsum method, the technology of the method is mature, and the method is adopted by most of the existing flue gas desulfurization processes.

Disclosure of Invention

In order to solve the technical problems, the invention provides novel desulfurization and haze reduction tower devices, which can ensure the original wet desulfurization process and simultaneously prevent a desulfurizing agent and desulfurization products from escaping along with flue gas, and the invention is realized by the following technical scheme:

flue gas desulfurization haze reduction tower, which comprises a tower shell and an internal assembly, and is characterized in that a tower body is divided into a desulfurization part and a haze reduction part from top to bottom by a partition plate, the desulfurization part is arranged below the tower shell, the haze reduction part is arranged above the desulfurization part, the inside of the tower shell of the desulfurization part is sequentially a slurry area, an air inlet area and a desulfurization area, the slurry area, the air inlet area and the desulfurization area are communicated, a flue gas inlet is formed in the position of the tower shell at the air inlet area, a desulfurizer is arranged in the desulfurization area, an air pipe arrangement area and a washing area are sequentially arranged inside the haze reduction part from bottom to top, the air pipe is a hollow pipe, a end is fixed in a pipe hole formed in the partition plate, the end extends to the washing area, the desulfurization area is communicated with the washing area through an air pipe hole, the washer is arranged on the upper portion of the washing area, the washer is connected.

Preferably, a water retaining cap is further arranged above the air pipe.

Preferably, the upper surface, the lower surface or the upper and lower surfaces of the water retaining cap are convex.

Preferably, wherein the air tube is bent at the upper portion, the bending angle β is not less than 90 °.

The related nouns mean:

1. and (3) wet desulphurization: the method is characterized in that flue gas to be desulfurized is contacted with a desulfurization solution, and the aim of desulfurization is achieved through mass transfer and reaction between gas and liquid. The current wet desulphurization method is a limestone/gypsum method; the desulfurizing agent in the limestone/gypsum method is limestone, the limestone is crushed and then mixed with water to form slurry, the slurry is contacted with flue gas, sulfur in the flue gas is converted into gypsum, and therefore desulfurization is completed.

2. The desulfurizer is a main component for removing sulfur in flue gas, the current mature desulfurization towers are mainly divided into two types, types are spray towers, desulfurization slurry is sprayed downwards from a nozzle in a mist shape and is in contact reaction with the flue gas flowing in the reverse direction to complete desulfurization, the nozzle or the nozzle combination in the tower is called a sprayer, the other types of towers are plate towers, the flue gas and the desulfurization slurry are in contact reaction on a tower tray to complete desulfurization, the tower tray in the tower is called a desulfurizer, and the desulfurizers of other types of desulfurization towers are similar to the tower tray.

3. A washer: the part for washing the flue gas with water can accomplish the function that water and flue gas mix to reach the purpose of washing flue gas. The common methods are as follows: in the spraying mode, a nozzle of a sprayer sprays water to be contacted with the flue gas for absorption, and the sprayer is called a washer; the flue gas is contacted and absorbed with water on the tower tray, and the tower tray is called a scrubber at the moment; similarly, this is true.

The invention has the beneficial effects that:

1. the structure is compact, and the processes of flue gas desulfurization and haze reduction (removal of entrained desulfurizer and desulfurization products and other dust) can be completed in towers;

2. the environment is protected, the flue gas is purified, and the flue gas can be discharged cleanly.

Drawings

FIG. 1 is a structural diagram of a flue gas desulfurization haze reduction tower;

FIG. 2 is a flow chart of a flue gas desulfurization haze reduction tower;

FIG. 3 is a structural view of a double-spherical water retaining cap;

FIG. 4 is a top view of FIG. 3;

fig. 5 is a structural view of a bent air tube.

Detailed Description

Example

The invention is described below with reference to fig. 1 and 2:

kinds of flue gas desulfurization and haze reduction tower comprises a tower shell 1 and internal components, the tower body is divided into a desulfurization part I and a haze reduction part II by a partition plate 2, the desulfurization part I is arranged below, the haze reduction part II is arranged above, a slurry area 3, an air inlet area 4 and a desulfurization area 5 are arranged in sequence in the tower shell 1 of the desulfurization part I from bottom to top, the slurry area 3 is an area for storing and collecting desulfurization slurry and is also called a slurry pool, the air inlet area is an area for allowing flue gas to enter the desulfurization and haze reduction tower, the desulfurization area 5 is an area for allowing the desulfurization slurry to contact with the flue gas and absorb reaction, in the embodiment, spraying desulfurization is adopted, so that the main components of a desulfurizer 8 are spray heads, the spray heads spray nozzles spray the desulfurization slurry to react with the reverse flue gas, an air pipe arrangement area 6 and a washing area 7 are arranged in sequence from bottom to top in the tower shell 1 of the haze reduction part II, the air pipe arrangement area 6 is an area for arranging air pipes 14 in a fixed space above the partition plate , the air pipes 14 are arranged side by side, the space between adjacent air pipes 14, the washing area for washing the flue gas after washing, and the washing area for removing dust in a washing water, and the flue gas washing water by adopting a washing method for removing dust in which other steps of flue gas washing.

The positions and the connection relations of all the areas and all the parts of the desulfurization and haze reduction tower are that a slurry area 3, an air inlet area 4 and a desulfurization area 5 are communicated, a desulfurization slurry inlet and a desulfurization slurry outlet are arranged in the slurry area 3 of a tower shell 1, a flue gas inlet 9 is arranged in the air inlet area 4, a desulfurizer 8 is arranged in the desulfurization area 5 and is a universal desulfurization tower spray header and can be directly purchased from the market, the desulfurization area 5 and a gas pipe arrangement area 6 are separated by a partition plate 2, the partition plate 2 is a pipe plate of a gas pipe 14, the gas pipe 14 is higher than the partition plate 2 for a certain height, the desulfurization area 5 is communicated with a washing area 7 through a gas pipe hole, a washer 10 is arranged at the upper part of the washing area 7, the washer 10 adopts a water spray header and can be customized from the market and is required to be uniform in sprayed water mist, a water outlet 11 is arranged at the bottom of the gas pipe arrangement area 6 of the tower shell 1.

The working principle of the flue gas desulfurization haze reduction tower is as follows: raw flue gas from a boiler is subjected to electrostatic dust removal, enters an air inlet area 4 of a tower shell 1 through a flue gas inlet 9, rises in the tower, enters a desulfurization area 5, meets desulfurization slurry in the desulfurization area 5, and sulfur in the flue gas is absorbed and reacts; the desulfurized flue gas continuously rises and enters a washing area 7 from an inner cavity of an air pipe fixed on the partition plate 2, water mist is sprayed downwards by a washer 10 in the washing area 7, the flue gas meets the water mist, a desulfurizer, a desulfurization product and other dust in the flue gas are washed away by the water, and the flue gas is changed into purified flue gas; the purified flue gas continuously rises and passes through a demister 12 arranged above the washing zone, and the demister 12 demists the flue gas; and the desulfurized haze-reducing tower is discharged from a flue gas outlet 13.

When the flue gas flows through the desulfurization haze-reducing tower, two liquid operation systems also exist:

(see the attached figure 2), the prepared desulfurization slurry (limestone slurry is adopted in the embodiment) is firstly conveyed to the slurry area 3, lifted by the outer pipe under the action of the pressure pump, enters the sprayer of the desulfurization area 5, is uniformly sprayed out from the nozzle of the spray head, is contacted and mixed with upward flue gas to complete desulfurization, the slurry containing sulfur falls into the slurry pool, is oxidized to become gypsum liquid, and the gypsum liquid is led out from the bottom of the slurry pool.

Secondly (see the attached figure 2), the washing water is conveyed into the washer 10 in the washing area 7 through a pump, sprayed out in a fog form from a nozzle and meets the ascending desulfurization flue gas, the water fog washes the desulfurizer, desulfurization products and other dust carried in the flue gas down and falls onto the partition plate 2 to form washing water, and the washing water flows out through a water outlet 11 of the air pipe arrangement area 6, enters a water storage tank, is purified and then is conveyed into the washer 10 through the pump, so that the circular washing is completed.

Example two

The present invention is explained below with reference to fig. 1, 2, 3 and 4:

on the basis of embodiment , a shielding device for the air pipe opening, namely a water blocking cap 15, is added at the position above the air pipe opening and the washing area 7, and is used for shielding the water sprayed by the washing device 10 from entering the inner cavity of the air pipe and falling into a slurry pool, the water blocking cap 15 is arranged at the upper part of the air pipe opening and is spaced from the air pipe 14, so that the flue gas enters the washing area 7 from the air pipe cavity, the water blocking cap 15 can be respectively arranged above each air pipe opening and can also be arranged into bodies, and the water blocking cap 15 with a double spherical surface is adopted in the embodiment.

EXAMPLE III

The present invention is explained below with reference to fig. 1, 2 and 5:

on the basis of the embodiment , the air pipe 14 of the washing area 7 is changed in such a way that the air outlet of the air pipe 14 is bent, and the bending angle β is not less than 90 degrees, so that after the change, the flue gas can still enter the washing area 7 through the inner cavity of the air pipe, but the washing water from the washing device 10 cannot enter the inner cavity of the air pipe, and then falls into the slurry tank.

Claims

The utility model provides a haze tower is subtracted in flue gas desulfurization, including tower shell and inside subassembly, a serial communication port, the tower body is divided into desulfurizing part and two parts about subtracting the haze portion by the baffle, the desulfurizing part is under, it is last to subtract the haze portion, from bottom to top in the tower shell of desulfurizing part, slurry zone is in proper order, intake zone and desulfurization zone, slurry zone, intake zone and desulfurization zone communicate with each other, the tower shell sets up the flue gas import in the intake zone position, the desulfurization zone sets up the desulfurizer, the desulfurizer advances union coupling with the outside thick liquids of tower shell, subtract inside trachea arrangement area and the washing district of being in proper order from bottom to top of haze portion tower shell, the trachea is fixed on the baffle and exceeds baffle and decides the height, the desulfurization district passes through trachea hole and washing district intercommunication, washing district upper portion installation scrubber, the scrubber links to each other with the outside the tower shell washing water inlet tube, the washing district communicates with each other with the flue gas outlet of.
2. The flue gas desulfurization haze reduction tower according to claim 1, wherein a water retaining cap is further arranged above the air pipe.
3. The flue gas desulfurization haze reduction tower of claim 2, wherein the upper, lower or upper and lower surfaces of the water retaining cap are convex.
4. The flue gas desulfurization haze reduction tower according to claim 1, wherein the air pipes are bent at the upper part, and the bending angle β is not less than 90 °.