CN111715064A - Wet desulphurization efficient dust removal desulfurization tower and application - Google Patents
Wet desulphurization efficient dust removal desulfurization tower and application Download PDFInfo
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- CN111715064A CN111715064A CN202010626854.6A CN202010626854A CN111715064A CN 111715064 A CN111715064 A CN 111715064A CN 202010626854 A CN202010626854 A CN 202010626854A CN 111715064 A CN111715064 A CN 111715064A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
Abstract
The invention discloses a wet desulphurization high-efficiency dedusting and desulfurizing tower and application thereof, and relates to the technical field of flue gas dedusting and desulfurizing, wherein the tower comprises a raw flue gas inlet, a nozzle, a spraying layer, an absorption liquid circulating pipe, a clean flue gas outlet, an absorption liquid circulating pump, an absorption liquid circulating tank, an oxidation air distribution pipe network, a plurality of jet pipes and a demister, wherein the jet pipes are uniformly distributed above the oxidation air distribution pipe network side by side, the upper ends of the jet pipes are close to the lower part of the raw flue gas inlet, the lower ends of the jet pipes are positioned in absorption liquid in the absorption liquid circulating tank, and the demister is arranged at the clean flue gas outlet. By adopting the scheme, the desulfurization and dust removal efficiency can be effectively improved, the operation energy consumption is reduced, the system structure is simplified, and the system is easy to maintain.
Description
Technical Field
The invention relates to the technical field of flue gas dust removal and desulfurization, in particular to a wet desulfurization efficient dust removal desulfurization tower and application thereof.
Background
SO in flue gas discharged in coal burning process2Has caused harm to the environment, and the flue gas must be subjected to desulfurization treatment to control the emission of the flue gas. The limestone-gypsum method is the most stable, mature and widely applied wet flue gas desulfurization process at present, and the smoke discharged from the coal burning process is generated in ChinaThe gas is treated and meets the requirements of the emission standard of thermal power atmospheric pollutants (GB 13223-2003). With the continuous improvement of the national requirement on environmental protection, the GB 13223-2003 standard is replaced by GB 13223-2011, the emission index of pollutants is stricter, wherein SO2Emission standard of 200mg/m3Increased to 50mg/m3The total dust emission requirement is lower than 50mg/m3The key area is increased to 20mg/m3. Recently, recommended emission outlet SO according to the coal-electricity energy conservation and emission reduction upgrade and improvement action plan (2014-2020)2The content is required to be less than 35mg/m3The total dust emission requires 5mg/m3. The desulfurization and dust removal capability of the original desulfurization device can not meet the new environmental protection emission index, and the existing device is necessary to be upgraded and modified to adapt to the new national environmental protection requirement.
At present, the recommended scheme for upgrading and modifying the existing device for desulfurization mainly comprises: the single PH value serial desulfurization tower, the single PH value parallel desulfurization tower, the single PH value increases the spray amount of the original desulfurization tower and the dual cycle desulfurization (namely, the circulating slurry of the absorption tower is divided into two independent reaction tanks and forms two circulation loops, each circulation loop operates under different PH values, so that the desulfurization reaction is carried out under more ideal conditions, and single tower dual cycle or dual tower dual cycle can be adopted to improve the desulfurization efficiency). The scheme is further perfected on the basis of the existing spray tower desulfurization mode, the desulfurization is firstly carried out, then the dedusting and efficiency-improving treatment is carried out, and the two effects are separately and independently carried out to achieve the environmental-friendly emission index. The whole implementation process is large in total investment, high in operating cost and low in oxidation rate of dual-cycle high-pH value slurry, and the slurry flows through a wet desulphurization high-efficiency dust removal desulphurization tower FT tower, pumps, pipelines, liquid collecting rings, liquid collecting hoppers, spray pipes and other areas, so that the inner wall of the flowing equipment is more in scale and needs to be stopped periodically.
Disclosure of Invention
In order to solve the technical problems, the invention provides a wet desulphurization high-efficiency dust removal desulfurization tower, which comprises a raw flue gas inlet, nozzles, a spraying layer, an absorption liquid circulating pipe, a purified flue gas outlet, an absorption liquid circulating pump, an absorption liquid circulating pool and an oxidation air distribution pipe network, wherein the raw flue gas inlet and the purified flue gas outlet are respectively arranged at two sides of a tower body, the spraying layer comprises a plurality of nozzles which are uniformly distributed at the upper part in the tower and positioned above the raw flue gas inlet, the absorption liquid circulating pipe and the absorption liquid circulating pump are arranged outside the tower body, the absorption liquid circulating pool is arranged at the lower part in the tower and provides absorption liquid for spraying for the spraying layer through the absorption liquid circulating pipe and the absorption liquid circulating pump, the oxidation air distribution pipe network is uniformly distributed in the absorption liquid circulating pool and also comprises a plurality of jet pipes and demisters, the jet pipes are uniformly distributed above the oxidation air distribution pipe network side by side, the upper ends, the lower end of the absorption liquid circulating tank is positioned in the absorption liquid of the absorption liquid circulating tank, and the demister is arranged at the clean flue gas outlet.
The technical effects are as follows: in the design scheme adopted by the invention, raw flue gas enters a desulfurizing tower and contacts with absorption liquid sprayed out from a nozzle at the top of the desulfurizing tower, the flue gas is cooled and saturated and washed to remove dust, part of sulfur dioxide is absorbed by the absorption liquid (primary absorption), and an absorption model of a spray tower is utilized; the flue gas after primary absorption is mixed and absorbed with absorption liquid through a jet pipe and enters an absorption liquid circulating tank, is dispersed into fine bubbles, passes through the liquid level at the upper part of the absorption liquid circulating tank, is further cleaned and is subjected to sulfur dioxide removal (secondary absorption), an absorption model of a bubble tower is utilized, fine fog drops carried by the flue gas generated in the absorption stage of a spray tower are captured by liquid after entering the absorption liquid circulating tank, and convenience is brought to dust removal of a subsequent device. By adopting the scheme, the desulfurization and dust removal efficiency can be effectively improved, the operation energy consumption is reduced, the system structure is simplified, and the system is easy to maintain.
The technical scheme of the invention is further defined as follows:
preceding a high-efficient dust removal desulfurizing tower of wet flue gas desulfurization, still including the liquid level control pipe that is used for controlling absorption liquid circulation pond liquid level, the liquid level control pipe includes fluid-discharge tube, flexible coupling, liquid level control U pipe, electric putter support and electric putter, and the fluid-discharge tube passes through the flexible coupling intercommunication with liquid level control U pipe, and the electric putter top is fixed with liquid level control U pipe, and electric putter is fixed electric putter and is fixed in absorption liquid circulation pond lateral wall to the electric putter support.
The wet desulphurization high-efficiency dedusting desulfurization tower further comprises an absorbent supply pipe, and the absorbent supply pipe is arranged in the jet pipe.
The wet desulphurization high-efficiency dedusting and desulfurizing tower at least comprises a second-stage flat plate type demisting structure.
The wet desulphurization efficient dust removal desulfurization tower has the advantages that the raw flue gas inlet and the clean flue gas outlet are arranged close to the upper part of the tower body, the flow speed of the raw flue gas entering the tower is 6-15m/s, and the angle of the raw flue gas entering the tower is 5-20 degrees.
The liquid-gas ratio of the absorption liquid sprayed out of the nozzle to the raw flue gas entering the raw flue gas inlet is (2-6): 1.
In the wet desulphurization high-efficiency dedusting and desulfurizing tower, the flow velocity of the flue gas in the jet pipe is 1-5 m/s.
The invention also aims to provide application of the wet desulphurization high-efficiency dust removal desulphurization tower, which comprises the following steps:
s1, enabling the raw flue gas to enter a desulfurizing tower through a raw flue gas inlet, firstly contacting the raw flue gas with absorption liquid sprayed by a nozzle of a top spraying layer to perform primary absorption, immediately cooling and saturating the raw flue gas, washing dust, absorbing part of sulfur dioxide by the absorption liquid, and evaporating part of water in the absorption liquid;
s2, enabling the flue gas subjected to temperature reduction, dust washing and partial sulfur dioxide absorption to flow downwards with absorption liquid through a jet pipe in a parallel flow mode, enabling the absorption liquid to enter an absorption liquid circulating pool, enabling the flue gas to enter the absorption liquid for secondary absorption, dispersing the flue gas into fine bubbles, enabling the fine bubbles to pass through the absorption liquid to go upwards, and enabling the flue gas to be further subjected to dust washing and sulfur dioxide removal;
and S3, converging the flue gas subjected to dust washing and sulfur dioxide removal in the middle of the desulfurization tower, passing through a demister arranged at a clean flue gas outlet, removing fine particles such as water mist, gypsum, slurry and the like carried in the flue gas, and discharging the treated flue gas through the clean flue gas outlet.
The invention has the beneficial effects that:
(1) in the invention, two PH value areas are present in the absorption liquid circulating pool, and the high PH value area is as follows: by adding limestone slurry near the upper liquid level of the absorption liquid circulation tank, the high PH slurry environment contributes to SO2Ensures that the secondary absorption area has higher PH value and ensures the SO at the flue gas outlet2The content reaches 35mg/m3The new environmental protection emission index of (2); the low pH region was: slurry pumped out from the bottom of the absorption liquid circulating tank is pumped to a spraying system at the top of the tower through an absorption liquid circulating pump to carry out primary absorption on the flue gas, the low pH value is favorable for full oxidation of calcium sulfite and gypsum crystallization, and the pH value of the absorption liquid circulating tank is gradually reduced from top to bottom;
(2) in the invention, the desulfurization efficiency is controlled by the pH value of the single tower and the double regions, and the height of the jet pipe inserted below the liquid level of the absorption liquid circulating pool can be timely adjusted by the liquid level adjusting pipe, SO that the liquid level height of the absorption liquid circulating pool is adjusted, and the SO of a flue gas outlet is ensured2The content reaches 35mg/m3The new environmental protection emission index of (2);
(3) the demister is arranged on the flue of the clean flue gas outlet, the air flow horizontally passes through the demister, the phenomenon of liquid drop entrainment is reduced, liquid drops in the flue gas are easier to separate, the operating gas speed of the demister is also improved, the investment of the demister is saved, and the mist drops removed by the demister directly flow into the desulfurizing tower;
(4) according to the invention, the height of the liquid level control U pipe is controlled by the upward and downward movement of the electric push rod, so that the height change of the overflow weir is achieved, and the liquid level height control of the circulating pool is realized;
(5) the device designed by the invention has lower overall height and is more convenient to operate and maintain.
Drawings
FIG. 1 is a flow diagram of desulfurization in a conventional process;
FIG. 2 is an elevation view of a conventional desulfurization tower;
FIG. 3 is a flow diagram of a desulfurization process of the present invention;
FIG. 4 is an elevational view of a desulfurization tower of the present invention;
FIG. 5 is a schematic view of a desulfurization tower according to the present invention;
FIG. 6 is a schematic view of a liquid level regulating tube according to the present invention;
wherein: 1. a raw flue gas inlet; 2. a nozzle; 3. a spray layer; 4. an absorption liquid circulation pipe; 5. a purified flue gas outlet; 6. a demister; 7. an absorption liquid circulating pump; 8. an absorption liquid circulation tank; 9. oxidizing an air distribution pipe network; 10. a jet pipe; 11. a liquid level regulating tube; 11-1, a liquid discharge pipe; 11-2, flexible connection; 11-3, a liquid level control U pipe; 11-4, an electric push rod bracket; 11-5, an electric push rod; 12. an absorbent supply tube.
Detailed Description
The structure of the high-efficiency dust-removing desulfurization tower adopting wet desulfurization provided by the embodiment is shown in fig. 5, and the high-efficiency dust-removing desulfurization tower adopting wet desulfurization comprises an original flue gas inlet 1, a nozzle 2, a spraying layer 3, an absorption liquid circulating pipe 4, a clean flue gas outlet 5, an absorption liquid circulating pump 7, an absorption liquid circulating pool 8, an oxidation air distribution pipe network 9, a jet pipe 10, a demister 6, a liquid level adjusting pipe 11 and an absorbent supply pipe 12.
The raw flue gas inlet 1 and the clean flue gas outlet 5 are respectively arranged at two sides of the tower body and are both arranged close to the upper part of the tower body, the flow rate of the raw flue gas entering the tower is 6-15m/s, and the angle of the raw flue gas entering the tower is 5-20 degrees. The spraying layer 3 comprises a plurality of nozzles 2 which are uniformly distributed above the tower and above the raw flue gas inlet 1, an absorption liquid circulating pipe 4 and an absorption liquid circulating pump 7 are arranged outside the tower, an absorption liquid circulating pool 8 is arranged below the tower and provides absorption liquid for spraying for the spraying layer 3 through the absorption liquid circulating pipe 4 and the absorption liquid circulating pump 7, and the ratio of the absorption liquid sprayed by the nozzles 2 to the raw flue gas entering from the raw flue gas inlet 1 is (2-6): 1. The oxidation air distribution pipe network 9 is uniformly distributed in the absorption liquid circulating pool 8, so that the oxidation air can be uniformly dispersed in the absorption liquid circulating pool 8, the sulfite in the absorption liquid can be fully oxidized, the slurry stirring effect is also realized, the absorption liquid in the absorption liquid circulating pool 8 can be timely and uniformly stirred, and the gypsum precipitation is prevented. The jet pipes 10 are arranged above the oxidation air distribution pipe network 9 side by side, the upper ends of the jet pipes are close to the lower part of the original flue gas inlet 1, the lower ends of the jet pipes are positioned in the absorption liquid of the absorption liquid circulation tank 8, and the flow velocity of the flue gas in the jet pipes 10 is 1-5 m/s. The demister 6 is arranged at the purified flue gas outlet 5 and at least comprises a second-stage flat plate type demisting structure.
The liquid level adjusting pipe 11 comprises a liquid discharge pipe 11-1, a flexible connection 11-2, a liquid level control U pipe 11-3, an electric push rod support 11-4 and an electric push rod 11-5, the liquid discharge pipe 11-1 is communicated with the liquid level control U pipe 11-3 through the flexible connection 11-2, the top end of the electric push rod 11-5 is fixed with the liquid level control U pipe 11-3, the electric push rod support 11-4 is used for fixing the electric push rod 11-5 and is fixed on the side wall of the absorption liquid circulating pool 8, the liquid level of the absorption liquid circulating pool 8 is controlled, and the desulfurization efficiency is guaranteed. An absorbent supply tube 12 is provided within the jet tube 10.
The working principle is as follows: the wet flue gas desulfurization tower is the core of the whole desulfurization technology, the absorption theory of hollow tower spraying is derived from a gas-water-in-water model, gas is a continuous phase, water is a dispersed phase, gas and water are in surface contact through water drops, and sulfur dioxide in the gas passes through an interface to enter a liquid phase, so that the desulfurization efficiency is improved, the gas-liquid contact area is required to be increased, namely the specific surface of the water drops is increased, the target can be realized by atomizing absorption liquid through the nozzle 2, but the smaller the particle size of the atomized water drops is, the easier the atomized water drops are taken away by flue gas, and the load is increased for a subsequent dust removal. The theory of the bubble tower is derived from a water-in-gas model, water is a continuous phase, gas is a dispersed phase, bubbles pass through absorption liquid, gas and water are in surface contact through the gas, sulfur dioxide in the gas passes through an interface to enter a liquid phase, some water drops can be entrained when the gas passes through the liquid and rises to the surface of the liquid, but the particle size of the entrained water drops is two orders of magnitude different from that of the water drops sprayed by the atomizing nozzle 2 on average, convenience is brought to a subsequent dust removal device, and the total dust emission can be less than 5mg/m through efficient demisting3The emission index of (1).
The working process is as follows: raw flue gas enters a desulfurization tower through a raw flue gas inlet 1, firstly contacts with absorption liquid sprayed out of a nozzle 2 of a top spraying layer 3 to carry out primary absorption, the raw flue gas is immediately cooled, saturated and washed to remove dust, part of sulfur dioxide is absorbed by the absorption liquid, and part of moisture in the absorption liquid is evaporated; the flue gas after being cooled, washed dust and absorbed with part of sulfur dioxide flows down through the jet pipe 10 in parallel, the absorption liquid enters the absorption liquid circulating pool 8, the flue gas enters the absorption liquid for secondary absorption, is dispersed into fine bubbles and passes through the absorption liquid to go up, and the flue gas is further washed dust and removed with sulfur dioxide; the flue gas after dust washing and sulfur dioxide removal is converged at the middle part of the desulfurization tower and then passes through a demister 6 arranged at a clean flue gas outlet 5 to remove fine particles such as water mist, gypsum, slurry and the like carried in the flue gas, and the treated flue gas is discharged through the clean flue gas outlet 5. The absorption liquid at the bottom of the tower is continuously supplied to the nozzle 2 at the top of the desulfurization tower by an absorption liquid circulating pump 7 outside the tower, and the absorption liquid enters an absorption liquid circulating pool 8 through the nozzle 2 and a jet pipe 10 and reacts with air conveyed by an oxidation air distribution pipe network 9 in the pool. The following are examples of applications:
the smoke parameters of the original smoke treatment device of a certain plant in the congratulation state are shown in the table 1 (single furnace):
TABLE 1 flue gas parameters
According to the design of the traditional dust removal desulfurization tower, the process flow is shown in figure 1, the elevation of the desulfurization tower is shown in figure 2, and the equipment parameters are shown in table 2:
TABLE 2 desulfurization tower and accompanying equipment parameters
According to the design of the invention, the process flow is shown in figure 3, the elevation of the desulfurizing tower is shown in figure 4, and the equipment parameters are shown in table 3: TABLE 3 desulfurizing tower and accessory equipment parameter table
The two process investment costs are compared in table 4:
TABLE 4 investment cost of two processes (unit: Wanyuan)
| Traditional high-efficient dust removal desulfurizing tower | The invention relates to a high-efficiency dust-removing desulfurizing tower | |
| Tower with a tower body | 720 | 530 |
| Slurry circulating pump | 180(4 pieces) | 50(1 bench) |
| Oxidation fan | 100 | 100 |
| Spray layer and nozzle | 80(4 sets) | 30(1 set) |
| Demister | 140 (three-level high efficiency ridge type) | 35 (second-level plate type) |
| Circulation pipeline | 20(4 pieces) | 6(1 root) |
| Stirrer | 120(4 pieces) | / |
| Jet pipe | / | 165(1000 root) |
| Others | 100 | 100 |
| Total up to | 1420 | 1056 |
The electrical comparison of the two processes is shown in table 5:
TABLE 5 two process electricity (unit: kwh)
As can be seen from Table 4, the investment cost of the process adopting the high-efficiency dust removal desulfurization tower is lower and is about 75 percent of that of the traditional process; as can be seen from Table 5, the process of the high-efficiency dust removal desulfurization tower of the invention has low electricity consumption, which is about 74 percent of that of the traditional process.
In conclusion, the invention effectively combines the bubbling tower and the spray tower, and reasonably arranges and optimizes the raw flue gas interface, the clean flue gas interface, the spray pipe network and the slurry stirring mode, so that the raw flue gas enters the tower to be timely cooled and saturated and to be subjected to primary spray absorption during the operation of the device, and then the raw flue gas is subjected to secondary bubbling absorption, the slurry flows stably in the tank, the gas-solid-liquid is fully contacted, the requirements of full oxidation of calcium sulfite and scale formation prevention are met, the desulfurization rate is improved, the gypsum entrainment is reduced, the dust removal efficiency is improved, and the operation energy consumption is reduced.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (8)
1. A wet desulphurization high-efficiency dedusting desulfurizing tower comprises a raw flue gas inlet (1), nozzles (2), a spraying layer (3), an absorption liquid circulating pipe (4), a clean flue gas outlet (5), an absorption liquid circulating pump (7), an absorption liquid circulating pool (8) and an oxidation air distribution pipe network (9), wherein the raw flue gas inlet (1) and the clean flue gas outlet (5) are respectively arranged at two sides of a tower body, the spraying layer (3) comprises a plurality of nozzles (2) which are uniformly arranged at the upper part in the tower and positioned above the raw flue gas inlet (1), the absorption liquid circulating pipe (4) and the absorption liquid circulating pump (7) are arranged outside the tower body, the absorption liquid circulating pool (8) is arranged at the lower part in the tower and provides absorption liquid for spraying through the absorption liquid circulating pipe (4) and the absorption liquid circulating pump (7), the oxidation air distribution pipe network (9) is uniformly distributed in the absorption liquid circulating pool (8), and is characterized in that: still include a plurality of efflux pipe (10), defroster (6), efflux pipe (10) are evenly arranged side by side oxidation air distribution pipe network (9) top, its upper end next-door neighbour former flue gas entry (1) below, its lower extreme is located in the absorption liquid of absorption liquid circulation pond (8), defroster (6) are located clean exhanst gas outlet (5) department.
2. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 1, characterized in that: the liquid level control device is characterized by further comprising a liquid level adjusting pipe (11) used for controlling the liquid level of the absorption liquid circulation pool (8), wherein the liquid level adjusting pipe (11) comprises a liquid discharge pipe (11-1), a flexible connection (11-2), a liquid level control U pipe (11-3), an electric push rod support (11-4) and an electric push rod (11-5), the liquid discharge pipe (11-1) is communicated with the liquid level control U pipe (11-3) through the flexible connection (11-2), the top end of the electric push rod (11-5) is fixed to the liquid level control U pipe (11-3), and the electric push rod support (11-4) is fixed to the electric push rod (11-5) and fixed to the side wall of the absorption liquid circulation pool (8).
3. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 1 or 2, characterized in that: also comprises an absorbent supply pipe (12), wherein the absorbent supply pipe (12) is arranged in the jet pipe (10).
4. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 1, characterized in that: the demister (6) at least comprises a two-stage flat plate type demisting structure.
5. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 1, characterized in that: the raw flue gas inlet (1) and the clean flue gas outlet (5) are both arranged close to the upper part of the tower body, the flow speed of raw flue gas entering the tower is 6-15m/s, and the angle of the raw flue gas entering the tower is 5-20 degrees.
6. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 5, characterized in that: the volume ratio (correct or not) of the absorption liquid sprayed out of the nozzle (2) to the raw flue gas entering from the raw flue gas inlet (1) is (2-6): 1.
7. The wet desulphurization high-efficiency dust removal desulfurization tower according to claim 5, characterized in that: the flow velocity of the flue gas in the jet pipe (10) is 1-5 m/s.
8. The use of the wet desulfurization high efficiency dust removal desulfurization tower of any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, enabling the raw flue gas to enter a desulfurizing tower through the raw flue gas inlet (1), firstly contacting with absorption liquid sprayed by a nozzle (2) of a top spraying layer (3) to perform primary absorption, immediately cooling and saturating the raw flue gas, washing dust, absorbing part of sulfur dioxide by the absorption liquid, and evaporating part of water in the absorption liquid;
s2, enabling the flue gas subjected to temperature reduction, dust washing and partial sulfur dioxide absorption and absorption liquid to flow downwards through the jet pipe (10) in a parallel mode, enabling the absorption liquid to enter an absorption liquid circulating pool (8), enabling the flue gas to enter the absorption liquid for secondary absorption, dispersing the flue gas into fine bubbles, enabling the fine bubbles to pass through the absorption liquid to ascend, and enabling the flue gas to be further subjected to dust washing and sulfur dioxide removal;
s3, converging the flue gas subjected to dust washing and sulfur dioxide removal in the middle of the desulfurizing tower, passing through the demister (6) arranged at the clean flue gas outlet (5), removing fine particles carried in the flue gas, and discharging the treated flue gas through the clean flue gas outlet (5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314928A (en) * | 2022-01-04 | 2022-04-12 | 湖南烯富环保科技有限公司 | Integrated production line and method for removing chloride ions and regenerating dechlorination agent from dechlorination slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314928A (en) * | 2022-01-04 | 2022-04-12 | 湖南烯富环保科技有限公司 | Integrated production line and method for removing chloride ions and regenerating dechlorination agent from dechlorination slag |
| CN114314928B (en) * | 2022-01-04 | 2023-09-08 | 湖南烯富环保科技有限公司 | Integrated production line and method for chloride ion removal and chlorine removal slag regeneration chlorine removal agent |
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