CN217746443U - A spray column for flue gas deacidification - Google Patents

Abstract

The application discloses a spray tower for deacidifying flue gas, which comprises a cylindrical tower body, wherein a circulation area, a spray area, a packing area and a demisting area are sequentially formed in the tower body from bottom to top; the tower body is provided with an air inlet communicated with the spraying area and an liquid outlet communicated with the circulating area, the demisting area is provided with a demister, the top of the tower body is provided with an air outlet, and two adjacent packing layers are arranged at intervals; corresponding to each layer of packing layer, a middle manhole is arranged on the tower body, and the middle manhole is positioned on the upper side of the corresponding packing layer. Utilize this application, can carry out preliminary absorption and washing to the acidic material in the flue gas, reduce the deposit volume of dirt on packing, prolong spray column's life adopts countercurrent washing, prolongs the contact time of absorption liquid and flue gas, has improved deacidification efficiency.

Description

A spray column for flue gas deacidification

Technical Field

The utility model relates to a spray column for flue gas deacidification.

Background

At present, lime slurry is generally adopted to react with acidic substances in the flue gas for treating the acid-containing flue gas, or adsorbing materials such as activated carbon are adopted to deacidify the flue gas, but when the lime slurry is adopted, the dust amount in the flue gas is increased, and dust removal treatment is needed, and when the activated materials are adopted for adsorption, the lime slurry is only suitable for the condition that the flue gas amount is not large, for a large-sized organic waste incinerator, a large amount of flue gas is generated during incineration, when the activated carbon is adopted for adsorption, the treatment cost is high, and for the activated carbon and other materials, the activated carbon and other materials are collected in a filtering mode and the like, so that the treatment cost of the organic waste is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a spray tower for deacidifying flue gas, which comprises a cylindrical tower body, wherein a circulation area, a spray area, a packing area and a demisting area are sequentially formed in the tower body from bottom to top; the tower body is provided with an air inlet communicated with the spraying area and an liquid outlet communicated with the circulating area, the demisting area is provided with a demister, the top of the tower body is provided with an air outlet, and two adjacent packing layers are arranged at intervals; corresponding to each layer of packing layer, a middle manhole is arranged on the tower body, and the middle manhole is positioned on the upper side of the corresponding packing layer. Specifically, the demister adopts a wire mesh demister.

This application is at the during operation, burn organic solution or organic gas produced flue gas and enter into the district that sprays by the air inlet, then flow upwards, pass through each packing layer in proper order, with the absorption liquid contact of downward flow, desorption acidic material wherein, then after the defroster dehydration, discharge by the gas vent, get into next process, the partial absorption liquid discharge in the circulation district gets into effluent disposal system, in the partial absorption liquid was squeezed into the spray thrower through the circulating pump after the liquid outlet discharge, and spout by atomizing nozzle, form water smoke, and flow downwards, absorb the acid component in the flue gas, drop at last in the circulation district. In the spraying area, the flue gas can accomplish evenly distributed to upwards flow, can also carry out the preliminary absorption to the acid material in the flue gas by the exhaust absorption liquid of lower floor packing layer moreover, can wash the flue gas simultaneously, reduce the solid particle in the flue gas, reduce the deposit volume of dirt on packing, prolong spray column's life. Meanwhile, a countercurrent washing mode is adopted, and the absorption liquid which falls after being sprayed is supported to a certain extent by the rising flue gas, so that the contact time of the flue gas and the absorption liquid is prolonged, the full contact between the flue gas and the absorption liquid is enhanced, and the deacidification efficiency is improved. Make up for the absorption liquid discharged from the circulation zone by replenishing with fresh absorption liquid.

Furthermore, corresponding to each packing layer, a sprayer is arranged above the packing layer, and a spray area is arranged between the sprayer and the corresponding packing layer. All set up a sprayer corresponding to every packing layer, can replenish the absorption liquid to every packing layer, improve the deacidification efficiency to the flue gas, set up the spraying district, can make atomizing nozzle spun water smoke overlap each other to make water smoke cover whole packing layer, avoid appearing the water smoke breach, lead to the decline of flue gas deacidification efficiency.

Further, the sprayer comprises a main spraying pipe and spraying branch pipes arranged on two sides of the main spraying pipe in the horizontal direction, and atomizing nozzles are arranged on the lower sides of the main spraying pipe and the spraying branch pipes. This design can arrange a plurality of atomizing nozzle on same spray thrower to improve atomizing nozzle's the homogeneity of arranging, make adjacent atomizing nozzle spun water smoke can partially overlap, so that water smoke can cover whole packing layer.

Specifically, the height of each packing layer is 0.8 to 1.2 meters. In the above height range of the packing layer, the absorption liquid can absorb acidic materials in the flue gas, the too high packing layer greatly reduces the absorption effect on the acidic materials, the cost performance is not high, the packing layer is too low, and the deacidification capability of each packing layer cannot be fully utilized.

Preferably, in order to secure a contact area of moisture, the packing layer is filled with at least one of raschig rings, saddle rings or pall rings.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the sprinkler.

Detailed Description

Referring to fig. 1 and 2, a spray tower for deacidifying flue gas includes a cylindrical tower body 10, a bottom plate 31 of the tower body is flat, an upper head 16 of the tower body is conical and protrudes upwards, and an exhaust port 15 is opened at the center of the upper head. An upper manhole 14 is arranged on the upper end closure.

In the tower body 10, a circulation area 111, a spraying area 112, a packing area 113 and a demisting area 114 are sequentially formed from bottom to top, two packing layers 23 are arranged in the packing area, the two packing layers are arranged at intervals, a support grid 24 is arranged corresponding to each packing layer, the support grids are fixedly arranged on the inner wall of the tower body, and packing pall rings are stacked on the support grids. In order to facilitate filling of the filler, a middle manhole 26 is installed on the tower body corresponding to each layer of the filler layer, the middle manhole is located on the upper side of the corresponding filler layer, each filler layer can be entered into through the middle manhole, corresponding parts are overhauled, and the filler is replaced. In this embodiment, the height of each packing layer is 1.1 m. It is understood that in other embodiments, raschig rings or saddle rings can be used as the packing, or several kinds of packing can be mixed and filled. A lower maintenance manhole 12 is arranged on the tower body corresponding to the spraying area.

Corresponding to each packing layer, a sprayer 21 is arranged, and the sprayer 21 is arranged above the corresponding packing layer. One main spray pipe 211 of each sprayer 21, one end of the main spray pipe 211 penetrates through the tower body 10 along the horizontal direction and then extends into the tower body, one end of the main spray pipe extending into the tower body is supported on a main support plate 214, the main support plate 214 is welded on the inner wall of the tower body, and the main spray pipe is fixed on the main support plate by a first U-shaped bolt 215; the other end of the main spray pipe is positioned outside the tower body and is formed into a liquid inlet 219.

The two sides of the horizontal direction of the spraying main pipe are respectively connected with four spraying branch pipes 212, one end of each spraying branch pipe, which is far away from the spraying main pipe, is supported on an auxiliary supporting plate 216, the auxiliary supporting plate 216 is welded on the inner wall of the tower body, and the spraying branch pipes are fixed on the auxiliary supporting plate 216 by second U-shaped bolts 217. The lower sides of the main spray pipe and the branch spray pipes are provided with atomizing nozzles 213, and in this embodiment, the atomizing nozzles are spiral nozzles.

Each shower 21 has a distance to the corresponding packing layer, which distance is formed as a spray zone 25, the height of which spray zone is 0.5 m in the present embodiment.

The tower body is provided with an air inlet 11 communicated with a spraying area 112 and an liquid outlet 19 communicated with a circulating area 111. Wherein the outlet of the air inlet faces downwards along the inclined direction. And a drain pipe 18 is also arranged at the bottom of the tower body and is positioned at the bottom of the tower body, and a glass tube liquid level meter 101 and an overflow pipe 17 are also arranged on the tower body corresponding to the circulating area 111.

The demister 13 is installed in the demisting zone 114, and in this embodiment, a wire mesh demister is specifically used as the demister.

The liquid outlet 19 is connected with the inlet of a circulating pump 41 through a liquid inlet pipe 42, the outlet of the circulating pump is connected with liquid inlets 219 of all sprayers 21, and a liquid supplementing pipe 43 is connected to the liquid inlet pipe 42 and is used for directly supplementing fresh absorption liquid into the spray tower through the circulating pump.

Claims (6)

1. A spray tower for deacidifying flue gas is characterized by comprising a cylindrical tower body, wherein a circulation area, a spray area, a packing area and a demisting area are sequentially formed in the tower body from bottom to top; the tower body is provided with an air inlet communicated with the spraying area and an liquid outlet communicated with the circulating area, the demisting area is provided with a demister, the top of the tower body is provided with an air outlet, and two adjacent packing layers are arranged at intervals; corresponding to each layer of packing layer, a middle manhole is arranged on the tower body and is positioned at the upper side of the corresponding packing layer.

2. The spray tower for deacidifying flue gas according to claim 1,

corresponding to each packing layer, a sprayer is arranged above the packing layer, and a spray area is arranged between the sprayer and the corresponding packing layer.

3. The spray tower for deacidifying flue gas according to claim 1,

the sprayer comprises a main spraying pipe and spraying branch pipes arranged on two sides of the main spraying pipe in the horizontal direction, and atomizing nozzles are arranged on the lower sides of the main spraying pipe and the spraying branch pipes.

4. The spray tower for deacidifying flue gas according to claim 1,

the height of each filler layer is 0.8-1.2 m.

5. The spray tower for deacidifying flue gas according to claim 1,

the demister adopts a wire mesh demister.

6. The spray tower for deacidifying flue gas according to claim 1,

the packing layer is filled with at least one of Raschig rings, saddle rings or pall rings.

Images