CN211216155U - Lime wet flue gas desulfurization tower - Google Patents
Lime wet flue gas desulfurization tower Download PDFInfo
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- CN211216155U CN211216155U CN201921865206.5U CN201921865206U CN211216155U CN 211216155 U CN211216155 U CN 211216155U CN 201921865206 U CN201921865206 U CN 201921865206U CN 211216155 U CN211216155 U CN 211216155U
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Abstract
The utility model relates to a lime flue gas desulfurization technical field specifically is a lime wet flue gas desulfurization tower, comprising a tower body, be equipped with the thick liquid in the tower body and spray the layer, still include cooling tower and pond, the thick liquid sprays the top on layer and is equipped with collection night dish, flow equalizing plate and water spray layer in proper order, the pond supplies water for the water spray layer through cold water circulating pump, the liquid inflow cooling tower that the collection dish will collect through the pipeline in, the pond is located the below of cooling tower, the top on water spray layer is equipped with the defroster. The flue gas is sprayed and washed by clean water in the desulfurization tower, the demister is used for acting, the dust and sulfate content in the flue gas is reduced, the problems of catalyst hole blockage and inactivation in a follow-up system are solved, the safe and stable operation of a denitration system is ensured, the ultralow emission standard is met, and the environment protection is facilitated.
Description
Technical Field
The utility model relates to a lime flue gas desulfurization technical field specifically is a lime wet flue gas desulfurization tower.
Background
The lime/limestone wet flue gas desulfurization process is widely applied to flue gas desulfurization of sintering machines in steel plants, in the early stage, because the production of the steel plants is relatively extensive, the emission standard is relatively loose, and a dedusting device after desulfurization is not arranged in a plurality of flue gas treatment processes, so that the dust content in the discharged flue gas and the sulfate content carried in flue gas fog drops are relatively high. At present, national and local environmental protection departments put forward stricter requirements on ultralow emission of smoke in the steel industry, wherein the content of SO2 is less than or equal to 35mg/Nm3, the content of dust is less than or equal to 10mg/Nm3, and the content of NOX is less than or equal to 50mg/Nm3, the prior desulphurization device can realize the ultralow emission of SO2 by means of effect improvement and other measures, a denitration system is arranged after lime-gypsum wet desulphurization, and an SCR denitration process is generally adopted, so that the standard emission of the NOX content can be realized, however, dust and sulfate (Na2SO4, K2SO4 and the like) carried in the flue gas after wet desulphurization are subjected to viscosity variation at high temperature, SO that the blockage of the SCR catalyst is easily caused, the safe operation of a denitration system is further influenced, therefore, the dust and the sulfate in the flue gas are removed or the content of the dust and the sulfate is reduced before a denitration system, and the problem that the safe and stable operation of the denitration process after the desulfurization is in short of the prior art is solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses be exactly to the above-mentioned deficiency that prior art exists, provide a lime wet flue gas desulfurization tower, reduced dust and sulfate content in the flue gas, solved follow-up catalyst hole jam and deactivation problem in the system of selling of taking off.
In order to realize the purpose, the utility model provides the following technical scheme:
the utility model provides a lime wet flue gas desulfurization tower, includes the tower body, be equipped with the thick liquid in the tower body and spray the layer, still include cooling tower and pond, the thick liquid sprays the top on layer and is equipped with the liquid collecting tray in proper order, flow equalizing plate and water spray the layer, the pond supplies water for the water spray layer through cold water circulating pump, the liquid that the liquid collecting tray will collect flows in the cooling tower through the pipeline, the pond is located the below of cooling tower, the top on water spray layer is equipped with the defroster.
Preferably, the upper end of the liquid collecting disc is uniformly provided with air holes, the upper end of each air hole is connected with an air lifting cap, the bottom of the liquid collecting disc is provided with a liquid outlet hole, and the liquid outlet hole is connected with the cooling tower through a pipeline.
Preferably, the gas lift cap comprises a gas lift cylinder, the gas lift cylinder is communicated with the gas hole, the lower end of the gas lift cylinder is welded with the liquid collecting disc, a supporting plate is arranged at the upper end of the gas lift cylinder, an upper baffle plate located above the gas lift cylinder is arranged at the upper end of the supporting plate, and a gas outlet channel is formed between the upper baffle plate and the gas lift cylinder.
Preferably, side baffles are arranged on two sides of the upper baffle and are located at the upper end edge of the air outlet channel.
Preferably, a sludge pump for discharging sludge is arranged in the water tank.
Preferably, the flow equalizing plate is uniformly provided with sieve pores.
Preferably, the water spraying layer adopts a spiral nozzle.
Preferably, the upper end of the tower body is provided with a wet electric system.
Compared with the prior art, the beneficial effects of utility model are that:
1. the utility model discloses utilize the clear water to spray the washing and utilize the defroster effect to the flue gas in the desulfurizing tower, reduced dust and sulfate content in the flue gas, solved follow-up catalyst hole jam and inactivation problem in the system of selling of taking off, ensure the safety and stability operation of deNOx systems, satisfied low emission standard, be favorable to the environmental protection.
2. The utility model discloses a liquid collecting tray and lift-gas cap can prevent that the water current that the water sprays the layer and sprays from entering the tower body bottom, avoid diluting the bottom thick liquid, and the lift-gas cap can be with the flue gas diffusion, the area of contact of increase and water, and the even dispersion of board to the flue gas is flowed to the rethread flow equalizer, guarantees the abundant contact of flue gas and water, improves and sprays the dust fall effect.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of a drip pan;
FIG. 3 is a front view of the lift cap;
fig. 4 is a left side view of the lift cap.
In the figure: 1-a tower body; 2-slurry spraying layer; 3-liquid collecting disc; 301-rising air cap; 302-liquid outlet holes; 303-side baffle; 304-a support plate; 305-liter gas cylinder; 306-an outlet channel; 307-upper baffle; 4-flow equalizing plate; 5-water spraying layer; 6-a demister; 7-a wet electric system; 8-a cooling tower; 9-a water pool; 901-sludge pump; 10-cold water circulating pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a lime wet flue gas desulfurization tower, including the tower body 1, cooling tower 8 and pond 9, cooling tower 8 adopts CLBJ-650ZX2 type counter-current cooling tower 8, be equipped with the thick liquid in the tower body 1 and spray layer 2, the thick liquid sprays the top on layer 2 and is equipped with the liquid collecting tray in proper order, flow equalizing plate 4 and water spray layer 5, evenly be equipped with the sieve mesh on the flow equalizing plate 4, pond 9 supplies water for water spray layer 5 through cold water circulating pump 10, water spray layer 5 adopts the screw-tupe nozzle, liquid collecting tray 3 flows into cooling tower 8 through the pipeline with the liquid of collecting in, pond 9 is located the below of cooling tower 8, the top of water spray layer 5 is equipped with defroster 6.
As shown in fig. 2, the upper end of drip pan 3 evenly is equipped with the gas pocket, even there is the cap 301 that rises to the upper end of gas pocket, and open the bottom of drip pan 3 has a liquid hole 302, and liquid hole 302 passes through the pipeline to be connected with cooling tower 8, and drip pan 3 and the cap 301 that rises are 2205 material, thickness 2mm, and drip pan 3 is fixed on the supporting beam with 1 inner wall connection of tower body to adopt bolted connection, the supporting cushion of shock attenuation of bolt, add the whole backing plate of PVC between drip pan 3 and 1 inner wall of tower body.
The main function of the air lift cap 301 is to ensure the passage of flue gas and prevent spray water from entering the bottom of the tower 1, as shown in fig. 3-4, the air lift cap 301 comprises an air lift cylinder 305, the air lift cylinder 305 is communicated with an air hole, the lower end of the air lift cylinder 305 is welded with a liquid collecting tray 3, the upper end of the air lift cylinder 305 is provided with a support plate 304, the upper end of the support plate 304 is provided with an upper baffle 307 positioned above the air lift cylinder 305, an air outlet channel 306 is arranged between the upper baffle 307 and the air lift cylinder 305, water falling from the water spray layer 5 cannot enter the air lift cylinder 305 and fall into the liquid collecting tray 3 through the air outlet hole 302, and in order to prevent water drops from entering the air outlet channel 306 in an inclined manner, the two sides of the upper baffle 307 are provided with side baffles 303, and the side baffles 303 are positioned at the upper end edge of the air outlet channel 306 to further shield the spray water.
The water tank 9 is supplied with clean water through tap water, and a sludge pump 901 for discharging sludge is arranged in the water tank 9.
The process flow is as follows: raw flue gas enters a tower body 1, the tower body 1 is matched with a slurry circulating pump, the slurry circulating pump and a slurry spraying layer 2 are designed according to a unit system, the raw flue gas is contacted with slurry fog drops atomized by nozzles on the slurry spraying layer 2, unsaturated raw flue gas is changed into saturated wet flue gas, the temperature of the flue gas is reduced to about 50 ℃, then the raw flue gas enters a water washing device, the first water washing stage is an air lifting cap 301 device, water sprayed by a water spraying layer 5 falls down after striking an upper baffle 307 and a side baffle 303 to form a water curtain to be fully contacted with the flue gas, the second water washing stage is a flow equalizing plate 4, the flow equalizing plate 4 has the functions of flue gas flow equalization and liquid holding layer formation, the flow equalizing plate 4 is in the form of a sieve plate, holes on the flow equalizing plate 4 are round holes, the flue gas passes through the liquid holding layer on the flow equalizing plate 4, the gas-liquid contact reaction time is prolonged, dust in, the water spray is matched with a solid cone spiral nozzle, the coverage rate of the absorption tower is ensured to be 200 percent, two layers of water washing devices are arranged together, the temperature of flue gas is reduced by 4-8 ℃ by the two layers of water washing devices, a large amount of condensed water can be separated from saturated wet flue gas, the condensed water and the washed spray water are collected out through a liquid collecting disc 3 and enter a cooling tower 8 through a water pipeline, the water after being heated up is cooled by the cooling tower 8 and then automatically flows to a water tank 9 below the cooling tower 8 through gravity, the water tank 9 is matched with a cold water circulating pump 10, the cold water circulating pump 10 pumps the supernatant of the clean water tank 9 to enter a water spray layer 5, the sludge formed at the bottom of the clean water tank 9 is discharged to a designated position of an owner through a sludge pump 901 and enters a high-efficiency demister through the water-washed flue gas, the first stage of the first layer, the second stage of the first layer of the high-efficiency demister is a coarse demister, streamline blades are selected, scaling caused by intercepting fogdrop dust can be effectively prevented, the fogdrop content behind a roof-type coarse separator can reach the level within 80mg/Nm3, the first stage of the second layer of the high-efficiency demister is a separator, the first stage of the second layer of the high-efficiency demister has the main function of coupling residual fine droplets removed by the pre-separator in a collision mode to realize the coupling of dust and dust, droplets and droplets, and dust and droplets, and the second stage of the second layer of the high-efficiency demister is a fine demister, has more excellent separation performance, has the limit fogdrop particle size as low as 13-14 u, achieves the effect of high-efficiency dedusting and demisting, and needs to be provided with an online washing system to ensure that demisting elements are clean in order to ensure that the demister can operate for a long time and high; the flue gas through the high-efficient defroster enters into wet electric system 7, and the flue gas through wet electricity reaches the requirement of minimum emission.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides a lime wet flue gas desulfurization tower, includes the tower body, be equipped with the thick liquid in the tower body and spray the layer, its characterized in that: still include cooling tower and pond, the top that the thick liquid sprayed the layer is equipped with liquid collecting tray, flow equalizing plate and water in proper order and sprays the layer, the pond passes through cold water circulating pump and sprays the layer water supply for the water, the liquid collecting tray flows into the cooling tower through the liquid that the pipeline will be collected in, the pond is located the below of cooling tower, the top that the water sprayed the layer is equipped with the defroster.
2. The lime wet flue gas desulfurization tower of claim 1, wherein: the upper end of the liquid collecting disc is uniformly provided with air holes, the upper end of each air hole is connected with an air lifting cap, the bottom of the liquid collecting disc is provided with a liquid outlet hole, and the liquid outlet hole is connected with the cooling tower through a pipeline.
3. The lime wet flue gas desulfurization tower of claim 2, wherein: the air lifting cap comprises an air lifting cylinder, the air lifting cylinder is communicated with the air hole, the lower end of the air lifting cylinder is welded with the liquid collecting disc, a supporting plate is arranged at the upper end of the air lifting cylinder, an upper baffle plate located above the air lifting cylinder is arranged at the upper end of the supporting plate, and an air outlet channel is formed between the upper baffle plate and the air lifting cylinder.
4. The lime wet flue gas desulfurization tower of claim 3, wherein: and side baffles are arranged on two sides of the upper baffle and are positioned at the upper end edge of the air outlet channel.
5. The lime wet flue gas desulfurization tower of claim 1, wherein: a sludge pump for discharging sludge is arranged in the water tank.
6. The lime wet flue gas desulfurization tower of claim 1, wherein: and the flow equalizing plate is uniformly provided with sieve pores.
7. The lime wet flue gas desulfurization tower of claim 1, wherein: the water spraying layer adopts a spiral nozzle.
8. The lime wet flue gas desulfurization tower of claim 1, wherein: and the upper end of the tower body is provided with a wet electric system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921865206.5U CN211216155U (en) | 2019-10-31 | 2019-10-31 | Lime wet flue gas desulfurization tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921865206.5U CN211216155U (en) | 2019-10-31 | 2019-10-31 | Lime wet flue gas desulfurization tower |
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| CN211216155U true CN211216155U (en) | 2020-08-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828139A (en) * | 2021-11-08 | 2021-12-24 | 佛山市粤辰新太机械设备有限公司 | Flue gas desulfurization dust removal complete sets |
| CN114477335A (en) * | 2022-01-25 | 2022-05-13 | 山东国舜建设集团有限公司 | Desulfurization wastewater evaporation and concentration zero-emission system and process based on double circulation loops |
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2019
- 2019-10-31 CN CN201921865206.5U patent/CN211216155U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828139A (en) * | 2021-11-08 | 2021-12-24 | 佛山市粤辰新太机械设备有限公司 | Flue gas desulfurization dust removal complete sets |
| CN114477335A (en) * | 2022-01-25 | 2022-05-13 | 山东国舜建设集团有限公司 | Desulfurization wastewater evaporation and concentration zero-emission system and process based on double circulation loops |
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