CN210495906U - Low-resistance circulating fluidized bed dry desulfurization reactor - Google Patents
Low-resistance circulating fluidized bed dry desulfurization reactor Download PDFInfo
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- CN210495906U CN210495906U CN201920788976.8U CN201920788976U CN210495906U CN 210495906 U CN210495906 U CN 210495906U CN 201920788976 U CN201920788976 U CN 201920788976U CN 210495906 U CN210495906 U CN 210495906U
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Abstract
The utility model relates to a low resistance circulating fluidized bed dry desulfurization reactor, including the ash bucket of from the bottom up intercommunication, venturi and absorption tower, one side intercommunication flue gas import section of ash bucket, be equipped with urgent ash valve and normal ash device of arranging on the ash bucket, venturi includes the horn mouth that from the bottom up set gradually, choke section and diffuser, the absorption tower includes reaction section and absorption tower backward flow section that from the bottom up set gradually, be equipped with the absorption tower export on one side of absorption tower backward flow section, choke section is equipped with the circulation ash entry with the junction of diffuser, the diffuser is equipped with the atomizing water entry with the junction of reaction section. The utility model provides a low resistance circulating fluidized bed dry desulfurization reactor, whole streamline is good, and structural resistance is little, and the flow field is even, and desulfurization efficiency is high, is difficult for the bed that collapses.
Description
Technical Field
The utility model relates to a chemical engineering equipment technical field especially relates to a low resistance circulating fluidized bed dry process desulfurization reactor.
Background
The comprehensive implementation of ultralow emission and energy-saving reconstruction of coal-fired power plants is an important national special action, and according to the notice requirement of issuing a working scheme for comprehensively implementing ultralow emission and energy-saving reconstruction of coal-fired power plants, namely, according to the environmental requirement of issuing No. 164 [ 2015 ], all coal-fired power plants with reconstruction conditions in the whole country in 2020 strive to realize ultralow emission (namely, under the condition that the reference oxygen content is 6%, the emission concentrations of smoke dust, sulfur dioxide and nitrogen oxide are respectively not higher than 10 mg/cubic meter, 35 mg/cubic meter and 50 mg/cubic meter).
At present, the dry desulfurization technology of a circulating fluidized bed is commonly used in the domestic technology for desulfurizing the flue gas of small units. The desulfurization efficiency is improved by improving the recycling rate of the absorbent and prolonging the contact time of the flue gas and the absorbent. Therefore, the process design of the tower has direct relation to the desulfurization efficiency, the running resistance and the running stability. The common absorption tower is that the flue gas passes through a venturi via an elbow and then is sent upwards into a tower body, then an absorbent and a proper amount of atomized water are sprayed into the tower, and pollutants in the flue gas react with the absorbent and the atomized water in the ascending process, so that the pollutants in the flue gas are removed. However, in the existing absorption tower, because the design of the venturi device is unreasonable, the flue gas flow field entering the tower body is not uniformly distributed, the tower bed is unstable, the ash falling is serious, and the normal operation of desulfurization and even the normal operation of a main machine are affected.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned not enough of prior art, the utility model provides a low resistance circulating fluidized bed dry desulfurization reactor solves current desulfurization inefficiency, the operation of column bed unstability, and falls the serious problem of ash.
The utility model discloses a realize through following technical scheme:
the utility model provides a low resistance circulating fluidized bed dry desulfurization reactor, includes ash bucket, venturi and the absorption tower of from the bottom up one time intercommunication, one side intercommunication flue gas import section of ash bucket, be equipped with urgent ash valve and the normal ash device of arranging on the ash bucket, venturi includes horn mouth, choke section and the diffuser that from the bottom up set gradually, the absorption tower includes reaction section and absorption tower backward flow section that from the bottom up set gradually absorption tower backward flow section one side is equipped with the absorption tower export, the throat section is equipped with the circulation ash entry with the junction of diffuser, the diffuser is equipped with the atomized water entry with the junction of reaction section.
Further, the flue gas inlet section is a circular pipe.
Furthermore, the ash bucket comprises an upper cylindrical part and a lower conical part, the conical part of the ash bucket is connected with two cylindrical discharge ports, and the ash bucket is also provided with a material level indicator.
Further, the diameter of the inlet of the bell mouth is 2.5 times of the diameter of the throat section, the length of the throat section is not more than 1.2 times of the diameter of the throat section, and the diffusion angle of the diffusion section is within 20 degrees.
Furthermore, the reflux section of the absorption tower consists of an eccentric reducer.
Further, the outlet of the absorption tower is of a flat cuboid structure, and the length-width ratio is 1.3.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a low resistance circulating fluidized bed dry desulfurization reactor, whole streamline is good, and structural resistance is little, and the flow field is even, and desulfurization efficiency is high, is difficult for the bed that collapses. The circulating ash inlet is arranged at the joint of the throat pipe section and the diffusion section, so that the circulating ash is carried into a bed layer at the inlet by high-speed airflow, and the entering of the circulating ash is not influenced due to low flow speed and unsmooth blanking; the atomized water inlet is formed in the diffusion section and the reaction section, so that the desulfurization is more efficient and stable, the distribution is more uniform, the wall is not easy to wet, and the drying time is sufficient.
Drawings
Fig. 1 is a schematic structural diagram of a low-resistance circulating fluidized bed dry desulfurization reactor of the present invention.
In the figure:
1. a flue gas inlet section; 2. a bell mouth; 3. a throat section; 4. a diffuser section; 5. a reaction section; 6. a reflux section of the absorption tower; 7. an outlet of the absorption tower; 8. an ash hopper; 9. an emergency ash discharge valve; 10. a normal ash discharge device; 11. a venturi tube; 12. an absorption tower; 13. a circulating ash inlet; 14. an atomized water inlet.
Detailed Description
The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present disclosure.
The low-resistance circulating fluidized bed dry desulfurization reactor shown in fig. 1 comprises an ash hopper 8, a venturi tube 11 and an absorption tower 12 which are communicated from bottom to top, wherein one side of the ash hopper 8 is communicated with a flue gas inlet section 1, an emergency ash discharge valve 9 and a normal ash discharge device 10 are arranged on the ash hopper 8, and the normal ash discharge device 10 discharges ash in a low-pressure conveying mode; the Venturi tube 11 comprises a bell mouth 2, a throat pipe section 3 and a diffusion section 4 which are sequentially arranged from bottom to top, the absorption tower 12 comprises a reaction section 5 and an absorption tower backflow section 6 which are sequentially arranged from bottom to top, and the diameter of the reaction section 5 controls the flow velocity to be within the range of 5-6 m/s; an absorption tower outlet 7 is arranged on one side of the reflux section 6 of the absorption tower, and a circulating ash inlet 13 is arranged at the joint of the throat section 3 and the diffusion section 4, so that the circulating ash is enabled to be brought into a bed layer at the inlet by high-speed airflow, and the entering of the circulating ash is not influenced due to low flow speed and unsmooth blanking; the joint of the diffusion section 4 and the reaction section 5 is provided with an atomized water inlet 14, and the desulfurization at the joint is efficient and stable, the distribution is uniform, the wall is not easy to wet, and the drying time is sufficient.
The flue gas inlet section 1 is a circular pipe.
The ash hopper 8 comprises an upper cylindrical part and a lower conical part, and the conical part of the ash hopper 8 is connected with two cylindrical discharge ports (one is an ash conveying and discharging port and the other is an emergency discharge port) for removing large particles and discharging ash in an accident state and a shutdown process of the absorption tower; and a material level meter is also arranged on the ash bucket 8.
The diameter of the inlet of the bell mouth 2 is 2.5 times of the diameter of the throat section 3, the flow velocity of the throat section 3 is controlled within the range of 40-60 m/s, the length of the throat section 3 is not more than 1.2 times of the diameter of the throat section 3, and the diffusion angle of the diffusion section 4 is within 20 degrees.
The reflux section 6 of the absorption tower consists of an eccentric reducer.
The outlet 7 of the absorption tower is of a flat cuboid structure, the length-width ratio is 1.3, and the flow velocity of the outlet 7 of the absorption tower is controlled within the range of 12 m/s.
In conclusion, the low-resistance dry desulfurization reactor for the circulating fluidized bed has the advantages of good overall streamline, small structural resistance, uniform flow field, high desulfurization efficiency and difficulty in bed collapse. The circulating ash inlet is arranged at the joint of the throat pipe section and the diffusion section, so that the circulating ash is carried into a bed layer at the inlet by high-speed airflow, and the entering of the circulating ash is not influenced due to low flow speed and unsmooth blanking; the atomized water inlet is formed in the diffusion section and the reaction section, so that the desulfurization is more efficient and stable, the distribution is more uniform, the wall is not easy to wet, and the drying time is sufficient.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. A low-resistance circulating fluidized bed dry desulfurization reactor is characterized by comprising an ash hopper (8), a Venturi tube (11) and an absorption tower (12) which are communicated from bottom to top, one side of the ash bucket (8) is communicated with the flue gas inlet section (1), the ash bucket (8) is provided with an emergency ash discharge valve (9) and a normal ash discharge device (10), the Venturi tube (11) comprises a bell mouth (2), a throat pipe section (3) and a diffusion section (4) which are arranged from bottom to top in sequence, the absorption tower (12) comprises a reaction section (5) and an absorption tower reflux section (6) which are arranged from bottom to top in sequence, an absorption tower outlet (7) is arranged on one side of the reflux section (6) of the absorption tower, a circulating ash inlet (13) is arranged at the joint of the throat pipe section (3) and the diffusion section (4), and an atomized water inlet (14) is formed at the joint of the diffusion section (4) and the reaction section (5).
2. The low resistance circulating fluidized bed dry desulfurization reactor according to claim 1, characterized in that said flue gas inlet section (1) is a circular duct.
3. The low-resistance circulating fluidized bed dry desulfurization reactor according to claim 1, characterized in that the ash hopper (8) comprises an upper cylindrical part and a lower conical part, two cylindrical discharge ports are connected to the conical part of the ash hopper (8), and a level indicator is further arranged on the ash hopper (8).
4. The low resistance circulating fluidized bed dry desulfurization reactor according to claim 1, characterized in that the inlet diameter of said bell mouth (2) is 2.5 times the diameter of the throat section (3), the length of said throat section (3) is not more than 1.2 times the diameter of the throat section (3), and the diffusion angle of said diffuser section (4) is within 20 °.
5. The low resistance circulating fluidized bed dry desulfurization reactor according to claim 1, wherein said absorption tower reflux section (6) is comprised of an eccentric reducer.
6. The low resistance circulating fluidized bed dry desulfurization reactor according to claim 1, characterized in that said absorber outlet (7) has a flat rectangular parallelepiped structure with an aspect ratio of 1.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920788976.8U CN210495906U (en) | 2019-05-28 | 2019-05-28 | Low-resistance circulating fluidized bed dry desulfurization reactor |
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| CN201920788976.8U CN210495906U (en) | 2019-05-28 | 2019-05-28 | Low-resistance circulating fluidized bed dry desulfurization reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715049A (en) * | 2020-07-02 | 2020-09-29 | 中冶华天工程技术有限公司 | Air flow disturbance device installed on circulating fluidized bed absorption tower |
| CN112588112A (en) * | 2020-12-30 | 2021-04-02 | 河南赛隆科技有限公司 | Desulfurization reaction tower capable of absorbing medicament internally |
-
2019
- 2019-05-28 CN CN201920788976.8U patent/CN210495906U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715049A (en) * | 2020-07-02 | 2020-09-29 | 中冶华天工程技术有限公司 | Air flow disturbance device installed on circulating fluidized bed absorption tower |
| CN112588112A (en) * | 2020-12-30 | 2021-04-02 | 河南赛隆科技有限公司 | Desulfurization reaction tower capable of absorbing medicament internally |
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