CN216136999U - Wet desulphurization system for industrial emission flue gas - Google Patents
Wet desulphurization system for industrial emission flue gas Download PDFInfo
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- CN216136999U CN216136999U CN202122000614.8U CN202122000614U CN216136999U CN 216136999 U CN216136999 U CN 216136999U CN 202122000614 U CN202122000614 U CN 202122000614U CN 216136999 U CN216136999 U CN 216136999U
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Abstract
The utility model relates to the technical field of flue gas desulfurization, in particular to a wet desulfurization system for industrial emission flue gas, which comprises a desulfurization tower, a mixing tank, a sedimentation tank, a clean water tank and a spray pump, wherein the mixing tank is connected with the desulfurization tower; the utility model discloses a desulfurization tower, including desulfurizing tower, mixing tank, spray pump, upper and lower liquid phase absorption, the lateral wall lower part of desulfurizing tower has seted up into the mouth of cigarette, and its top has seted up the exhaust port, desulfurizing tower's inside bottom doctor solution via the pipeline pump send to in the mixing tank, mixed liquid in the mixing tank via the pipeline pump send to carry out supernatant separation and deposit in the sedimentation tank, supernatant via the pipeline pump send to in the clear water tank, the spray pump will spray liquid pump in the clear water tank send to in the desulfurizing tower, spray desulfurization treatment to the flue gas, owing to adopt the higher sodium alkali of activity as the reaction solution to for liquid phase absorption in the desulfurizing tower, thereby solved interior crystallization scale deposit of tower and thick liquids pipe jam scheduling problem, and obviously improved desulfurization efficiency, the raw materials of desulfurization consumption still calcium alkali, can effectively reduced the operation cost of a whole set of desulfurization equipment.
Description
Technical Field
The utility model relates to the technical field of flue gas desulfurization, in particular to a wet desulphurization system for industrial emission flue gas.
Background
The wet flue gas desulfurization is the most widely applied flue gas desulfurization technology at present, namely, the flue gas is washed in a cyclone column plate by using solution or slurry containing a desulfurizing agent, so that sulfur dioxide in the flue gas and a desulfurizing liquid perform a sufficient absorption reaction under a better mass transfer condition in the cyclone column plate, thereby greatly reducing the concentration of the sulfur dioxide in the flue gas and achieving the aim of desulfurization. In the existing desulfurization system process, the wet limestone/limestone method cyclone plate tower technology is mature, the desulfurization efficiency is high, but calcium alkali is adopted as the desulfurization reaction raw material, so that crystallization and scaling are easily generated due to excessive calcium in use, the blockage of an absorption system and a pipeline is caused, and the operation cost of the whole set of desulfurization equipment is obviously increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the wet desulphurization system for the industrial emission flue gas, which adopts the double alkali method and has the obvious advantages that the problems of crystallization and scaling in the tower, slurry pipe blockage and the like are solved because the sodium alkali with higher activity is adopted as the reaction liquid and the liquid phase is absorbed in the desulphurization tower, the desulphurization efficiency is obviously improved, the raw materials consumed by desulphurization are calcium alkali, and the operation cost of the whole set of desulphurization equipment can be effectively reduced.
The utility model is realized by the following technical scheme:
a wet desulphurization system for industrial emission flue gas comprises a desulphurization tower, a mixing tank, a sedimentation tank, a clean water tank and a spray pump;
the utility model discloses a desulfurization tower, including the lateral wall of desulfurizing tower, mixing tank, supernatant separation and precipitation, the lateral wall lower part of desulfurizing tower has seted up into the mouth of cigarette, and the exhaust port has been seted up at its top, the inside bottom desulfurization liquid of desulfurizing tower is via the pipeline pump sending extremely in the mixing tank, the mixed liquid in the mixing tank is via the pipeline pump sending extremely carry out the supernatant separation in the sedimentation tank and deposit, the supernatant is via the pipeline pump sending extremely in the clear water tank, the spray pump will spray liquid pump sending in the clear water tank extremely in the desulfurizing tower, spray desulfurization to the flue gas and handle.
Preferably, when advancing the mouth and using, the kiln flue gas carries extremely through the draught fan in the desulfurizing tower, wherein still include the bypass pipeline with former chimney intercommunication on the pipeline of draught fan, pipeline with the bypass pipeline is equipped with the valve on the road respectively.
Preferably, the desulfurization tower adopts a counter-flow FGD spray absorption tower.
Preferably, when the mixing tank is used, the mixing tank further comprises a lime slaking tank, and the slurry in the lime slaking tank is pumped into the mixing tank through a pipeline and is mixed and reacted with the desulfurization solution.
Preferably, the mixing tank and the lime slaking tank respectively comprise stirring mechanisms which are respectively arranged and used for respectively stirring the mixed liquid.
Preferably, when the sedimentation tank is used, the sedimentation tank further comprises a sludge pump and an oxidation tank, wherein the sludge pump pumps the sediments in the sedimentation tank into the oxidation tank through a pipeline for oxidation treatment.
Preferably, when the clean water tank is used, the clean water tank further comprises a sodium alkali tank, and sodium alkali liquor stored in the sodium alkali tank is pumped into the clean water tank through a pipeline.
Preferably, the upper part in the desulfurizing tower further comprises three layers of spraying pipelines which are arranged and communicated with the spraying pump, and a plurality of spraying nozzles are uniformly arranged at the bottom of each spraying pipeline.
Preferably, the upper portion still includes the baffling defroster that sets up in the desulfurizing tower, and the flue gas is in after the desulfurizing purification in the desulfurizing tower, the process baffling defroster gets rid of the water smoke that contains in the flue gas, then discharges by the exhaust port.
Preferably, the desulfurizing tower is made of an acid and alkali corrosion resistant glass fiber reinforced plastic material, and the spray pump is an anticorrosive wear-resistant polymer lining plastic pump.
The utility model has the beneficial effects that:
the utility model adopts the design and the use of the structure, based on the principle of a double alkali method, sodium alkali is used as a reaction raw material in the desulfurization tower body, sodium alkali with higher activity is used as reaction absorption alkali liquor to react and absorb SO2 in the tower body, calcium alkali such as lime or carbide slag slurry is used in a sedimentation tank outside the tower body to carry out regeneration reaction on the discharged liquid after the reaction in the tower body, the sodium alkali consumed by the reaction and absorption in the tower body is replaced and reduced by the calcium alkali, and the sodium alkali returns to the tower body again to carry out reaction desulfurization, namely, the raw material consumed by desulfurization is the calcium alkali in the desulfurization process, SO the operation cost of the whole set of desulfurization equipment can be effectively reduced, and the obvious advantage of the double alkali method is that the problems of scaling of crystallization of the tower, blocking of a slurry pipe and the like in the desulfurization tower are solved because the sodium alkali with higher activity is used as the reaction liquid phase absorption in the desulfurization tower, and the desulfurization efficiency is obviously improved;
the utility model has novel structure, reasonable design, simple and flexible operation and stronger practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-a desulfurizing tower, 101-a smoke inlet, 102-a smoke outlet, 2-a mixing tank, 3-a settling tank, 4-a clean water tank, 5-a spray pump, 51-a spray nozzle, 6-a bypass pipeline, 7-a lime digestion tank, 8-a stirring mechanism, 9-a sludge pump, 10-an oxidation tank and 11-a sodium soda tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the embodiment specifically discloses and provides a technical scheme of a wet desulphurization system for industrial exhaust flue gas, which includes a desulphurization tower 1, a mixing tank 2, a settling tank 3, a clean water tank 4 and a spray pump 5; the flue gas inlet 101 has been seted up to the lateral wall lower part of desulfurizing tower 1, and exhaust port 102 has been seted up at its top, and desulfurizing liquid carries out the supernatant separation and deposits in the inside bottom of desulfurizing tower 1 is through the pipeline pump sending to mixing tank 2, and the mixed liquid in the mixing tank 2 carries out the supernatant separation in the sedimentation tank 3 through the pipeline pump sending, and the supernatant carries out the spray desulfurization to the flue gas in the clean water basin 4 through the pipeline pump sending to clean water basin 4, spray pump 5 in with the spray liquid pump sending to desulfurizing tower 1 in with clean water basin 4.
Specifically, when the smoke inlet 101 is used, kiln smoke is conveyed into the desulfurizing tower 1 through the induced draft fan, wherein the conveying pipeline of the induced draft fan further comprises a bypass pipeline 6 communicated with the original chimney, valves are respectively arranged on the conveying pipeline and the bypass pipeline 6, and through the bypass pipeline 6, when the desulfurizing system device is in failure and is stopped, the smoke can be discharged through the original chimney, and the work of the kiln body is not influenced.
Specifically, the desulfurization tower 1 adopts a counter-flow FGD spray absorption tower, meets the requirements of sulfur content of different raw materials while meeting the surface area required by absorbing SO2, and simultaneously reduces the pressure loss caused by spraying to the minimum.
Specifically, when the mixing tank 2 is used, the mixing tank further comprises a lime slaking tank 7, and slurry in the lime slaking tank 7 is pumped into the mixing tank 2 through a pipeline and is mixed and reacted with the desulfurization solution.
Specifically, the mixing tank 2 and the lime slaking tank 7 each include a stirring mechanism 8 disposed therein, for stirring the mixed liquid thereof.
Specifically, when the sedimentation tank 3 is used, the sedimentation tank further comprises a sludge pump 9 and an oxidation tank 10, wherein the sludge pump 9 pumps the sediments in the sedimentation tank 3 into the oxidation tank 10 through a pipeline for oxidation treatment.
Specifically, when the clean water tank 4 is used, the clean water tank further comprises a sodium alkali tank 11, sodium alkali liquor stored in the sodium alkali tank 11 is pumped into the clean water tank 4 through a pipeline, and sodium alkali absorption liquid is used as spraying liquid, so that no precipitate is formed in an absorption system in the desulfurizing tower 1.
The upper portion still sprays the pipeline including the three-layer that sets up and spray pump 5 and be linked together in 1 concrete desulfurizing tower, and the bottom that sprays the pipeline evenly is equipped with a plurality of nozzles 51 that spray, sprays nozzle 51 and specifically adopts the special nozzle of desulfurization, can effectively reduce the jam phenomenon of nozzle in the use, improves reaction rate and desulfurization efficiency greatly.
Specifically, the upper part in the desulfurizing tower 1 also comprises a baffling demister, and after the flue gas is desulfurized and purified in the desulfurizing tower 1, water mist contained in the flue gas is removed by the baffling demister and then is discharged from the smoke outlet 102; through above-mentioned baffling type defroster, can get rid of in the flue gas through spraying the moisture back of layer entrainment and discharging the atmosphere of entering through exhaust port 102.
Concretely, desulfurizing tower 1 adopts acid and alkali corrosion resistant glass steel material to make, improves acid and alkali corrosion resistance to can bear the wearing and tearing of flue gas flying dust and desulfurization suspended solid, and spray pump 5 and adopt anticorrosive wear-resisting polymer to line with and mould the pump, can effectively avoid quick wearing and tearing, scale deposit and jam.
The working principle of the utility model is as follows: when the technical scheme is used, kiln flue gas is conveyed by the draught fan and enters the desulfurizing tower 1 through the smoke inlet 101 to be in countercurrent contact with the spray liquid for reaction and absorption, SO2 in the flue gas is absorbed by the spray liquid in the desulfurizing tower 1 at the moment, the removal rate of the flue gas SO2 at the outlet is more than 90%, and the flue gas after desulfurization and purification is discharged through the smoke outlet 102 after water mist and mist drops in the flue gas are removed by the upper-section high-efficiency combined demister.
And the spray liquid is fully contacted and reacted with the flue gas to form desulfurized liquid, the desulfurized liquid is pumped by a return pipeline at the bottom of the tower body of the desulfurizing tower 1 and flows back into the mixing pool 2, the desulfurized liquid flowing into the mixing pool 2 and lime or carbide slag slurry carry out regeneration reaction, the reaction liquid enters the sedimentation pool 3 for separation and sedimentation treatment, the supernatant liquid separated by the regeneration reaction is sodium alkali liquid, the sodium alkali liquid is circulated again and enters the clean water pool 4 for spraying by the spray pump 5, and the bottom mixed liquid enters the oxidation pool 10 for oxidation treatment to obtain gypsum.
The principle of the reaction and absorption of the flue gas SO2 is mainly a double-alkali method: sodium alkali liquor is used as reaction spraying alkali liquor in the separation tower to react and absorb SO2 contained in the flue gas, then lime or carbide slag slurry is used as reducing alkali liquor to react and regenerate the desulfurized reaction absorption liquid, and the regenerated absorption liquid can be recycled.
The utility model adopts the design and the use of the structure, based on the principle of a double alkali method, sodium alkali is used as a reaction raw material in the desulfurization tower body, sodium alkali with higher activity is used as reaction absorption alkali liquor to react and absorb SO2 in the tower body, calcium alkali such as lime or carbide slag slurry is used in a sedimentation tank outside the tower body to carry out regeneration reaction on the discharged liquid after the reaction in the tower body, the sodium alkali consumed by the reaction and absorption in the tower body is replaced and reduced by the calcium alkali, and the sodium alkali returns to the tower body again to carry out reaction desulfurization, namely, the raw material consumed by desulfurization is the calcium alkali in the desulfurization process, SO the operation cost of the whole set of desulfurization equipment can be effectively reduced, and the obvious advantage of the double alkali method is that the problems of scaling of crystallization of the tower, blocking of a slurry pipe and the like in the desulfurization tower are solved because the sodium alkali with higher activity is used as the reaction liquid phase absorption in the desulfurization tower, and the desulfurization efficiency is obviously improved.
The control mode of the electrical components is controlled by a PLC control box of a control terminal matched with the electrical components, a control circuit can be realized by simple programming of a person skilled in the art, the control circuit belongs to the common general knowledge in the field, the control circuit is only used and is not improved, and the control circuit is mainly used for protecting a mechanical device, so the control mode and the circuit connection are not described in detail in the utility model.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an industrial emission flue gas wet flue gas desulfurization system which characterized in that: comprises a desulfurizing tower (1), a mixing tank (2), a sedimentation tank (3), a clean water tank (4) and a spray pump (5);
the flue gas inlet (101) have been seted up to the lateral wall lower part of desulfurizing tower (1), and exhaust port (102) have been seted up at its top, the inside bottom doctor solution of desulfurizing tower (1) via the pipeline pump send extremely in mixing tank (2), mixed liquid in mixing tank (2) via the pipeline pump send extremely carry out supernatant separation and deposit in sedimentation tank (3), the supernatant via the pipeline pump send extremely in clean water basin (4), spray pump (5) will spray the liquid pump send extremely in clean water basin (4) in desulfurizing tower (1), spray desulfurization to the flue gas.
2. The industrial emission flue gas wet desulphurization system according to claim 1, wherein when the flue gas inlet (101) is in use, the kiln flue gas is conveyed into the desulphurization tower (1) through an induced draft fan, wherein a bypass pipeline (6) communicated with an original chimney is further included on the conveying pipeline of the induced draft fan, and valves are respectively arranged on the conveying pipeline and the bypass pipeline (6).
3. The wet desulphurization system for industrial exhaust flue gas according to claim 1, wherein the desulphurization tower (1) adopts a counter-flow FGD spray absorption tower.
4. The wet desulphurization system for the industrial exhaust flue gas according to claim 1, wherein the mixing tank (2) is used and further comprises a lime slaking tank (7), and the slurry in the lime slaking tank (7) is pumped into the mixing tank (2) through a pipeline to be mixed and reacted with the desulphurization solution.
5. The wet desulphurization system for industrial exhaust flue gas according to claim 4, wherein the mixing tank (2) and the lime slaking tank (7) each comprise a stirring mechanism (8) respectively arranged therein for stirring the mixed liquid thereof.
6. The industrial emission flue gas wet desulphurization system according to claim 1, wherein the sedimentation tank (3) further comprises a sludge pump (9) and an oxidation tank (10) when in use, and the sludge pump (9) pumps the sediment in the sedimentation tank (3) into the oxidation tank (10) through a pipeline for oxidation treatment.
7. The wet desulphurization system for industrial exhaust gas according to claim 1, wherein the clean water tank (4) is used and further comprises a sodium-alkali tank (11), and sodium alkali liquor stored in the sodium-alkali tank (11) is pumped into the clean water tank (4) through a pipeline.
8. The wet desulphurization system for industrial exhaust flue gas according to claim 1, wherein the upper part in the desulphurization tower (1) further comprises three layers of spraying pipelines which are arranged and communicated with the spraying pump (5), and the bottoms of the spraying pipelines are uniformly provided with a plurality of spraying nozzles (51).
9. The wet desulphurization system for industrial exhaust flue gas according to claim 1, wherein the upper part in the desulphurization tower (1) further comprises a baffling demister, and after the flue gas is desulfurized and purified in the desulphurization tower (1), water mist contained in the flue gas is removed by the baffling demister and then discharged from the smoke outlet (102).
10. The wet desulphurization system for industrial exhaust flue gas according to claim 1, wherein the desulphurization tower (1) is made of an acid-base corrosion resistant glass fiber reinforced plastic material, and the spray pump (5) is a corrosion-resistant wear-resistant polymer plastic-lined pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122000614.8U CN216136999U (en) | 2021-08-24 | 2021-08-24 | Wet desulphurization system for industrial emission flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122000614.8U CN216136999U (en) | 2021-08-24 | 2021-08-24 | Wet desulphurization system for industrial emission flue gas |
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| CN216136999U true CN216136999U (en) | 2022-03-29 |
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| CN202122000614.8U Active CN216136999U (en) | 2021-08-24 | 2021-08-24 | Wet desulphurization system for industrial emission flue gas |
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