CN112058028A - Double-tower double-circulation desulfurization system and method for eliminating accident slurry system - Google Patents
Double-tower double-circulation desulfurization system and method for eliminating accident slurry system Download PDFInfo
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- CN112058028A CN112058028A CN202010995371.3A CN202010995371A CN112058028A CN 112058028 A CN112058028 A CN 112058028A CN 202010995371 A CN202010995371 A CN 202010995371A CN 112058028 A CN112058028 A CN 112058028A
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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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- B01D53/14—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 by absorption
- B01D53/1406—Multiple stage absorption
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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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
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Abstract
The utility model provides a double-tower double-circulation desulfurization system and a method for eliminating an accident slurry system, which comprises the following steps: the device comprises a first-stage absorption tower and a second-stage absorption tower, wherein the first-stage absorption tower is connected with a first-stage tower gypsum discharge pump through a first pipeline, and the second-stage absorption tower is connected with a second-stage gypsum discharge pump through a second pipeline; the first-stage tower gypsum discharge pump and the second-stage gypsum discharge pump are both connected with the desulfurization system through a third pipeline; a reflux pipeline is arranged on the third pipeline and is respectively connected with the primary absorption tower and the secondary absorption tower; the design of an accident slurry system is cancelled, the construction period is effectively prevented from being prolonged due to the construction of the independent accident slurry system, the construction period is ensured, the engineering quality is ensured, and the increase of on-site construction is reduced, so that the planning of a wet desulphurization area is more standard, and the fire-fighting maintenance road is smoother; the method reduces the workload of corrosion, scaling and maintenance in the desulfurization system, reduces the workload of equipment maintenance and reduces the energy consumption of the desulfurization system.
Description
Technical Field
The disclosure belongs to the technical field of desulfurization, and particularly relates to a double-tower double-circulation desulfurization system and method for eliminating an accident slurry system.
Background
The accident slurry discharge system is an important system for ensuring the stable operation of the desulfurization facility, and has the main function that when the desulfurization system breaks down, slurry in the system is discharged into the accident slurry box, so that gypsum slurry in the absorption tower to the drainage pit can be emptied in time. When the conventional design of the desulfurization accident slurry discharge system is adopted, the accommodation capacity of an accident slurry pool is considered firstly; secondly, the return operation of the accident slurry and the cleaning operation after the accident slurry tank is used must be considered.
Because the slurry amount in the whole desulfurization system is large, the occupied area of an accident slurry box is large, the slurry solid content is high, a large jacking stirrer or a plurality of side-entering stirrers provided with a safety power supply are required to maintain slurry suspension, and the electricity consumption during the slurry storage period is large. In winter with low air temperature in individual regions, heat preservation and heat supplement are needed to be carried out on the accident slurry system, and the required energy consumption is also high. When the desulfurization system is repaired, the stored gypsum slurry is sent back to the absorption tower through an accident slurry return pump; the emergency slurry system is also an important system for preventing corrosion and fouling in desulfurization systems.
The inventor finds that the independent configuration of the accident slurry system in the desulfurization system includes an accident slurry tank, an accident slurry tank stirrer, an accident slurry tank liquid level meter, an accident slurry return pump, an accident slurry pump instrument, a valve, a pipeline, pipeline flushing water and the like. From the design of the accident slurry system, the material, the construction and the operation and maintenance, the work is heavy and complex, the material cost is high, the construction content is multi-culvert civil engineering foundation, equipment installation, pipeline laying and the like. Investment cost should not be increased, and the occupied area of the accident slurry system is large. The one-time cost is high, and the later operation and maintenance cost is also high.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a double-tower double-circulation desulfurization system and method that cancels an accident slurry system.
In a first aspect, the present disclosure provides a dual tower dual cycle desulfurization system that eliminates an accident slurry system, comprising: the device comprises a first-stage absorption tower and a second-stage absorption tower, wherein the first-stage absorption tower is connected with a first-stage tower gypsum discharge pump through a first pipeline, and the second-stage absorption tower is connected with a second-stage gypsum discharge pump through a second pipeline; the first-stage tower gypsum discharge pump and the second-stage gypsum discharge pump are both connected with the desulfurization system through a third pipeline; and a reflux pipeline is arranged on the third pipeline and is respectively connected with the first-stage absorption tower and the second-stage absorption tower.
In a second aspect, the present disclosure provides a method of using the dual column dual cycle desulfurization system of the first aspect, comprising:
when the double-tower double-circulation system normally operates, the first-stage tower gypsum discharge pump is started to discharge fully oxidized gypsum slurry to the gypsum dehydration system, and the second-stage tower gypsum discharge pump is started to discharge second-stage tower gypsum slurry to the first-stage tower or the gypsum dehydration system;
when the primary absorption tower is in a maintenance state, discharging gypsum slurry in the primary absorption tower to the secondary absorption tower through a gypsum discharge pump and a reflux pipeline of the primary absorption tower, and after the primary absorption tower is repaired to be in a failure state, returning the gypsum slurry to the primary absorption tower through a gypsum discharge pump and a reflux pipeline of the secondary absorption tower;
when the secondary absorption tower is in the maintenance state, gypsum slurry in the secondary absorption tower is discharged to the primary absorption tower through a gypsum discharge pump and a reflux pipeline of the secondary absorption tower, and after the failure repair secondary absorption tower recovers to operate, the gypsum slurry is sent back to the secondary absorption tower through the gypsum discharge pump and the reflux pipeline of the primary absorption tower.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. this openly utilize two circulation system in two towers, be equipped with return line on through the third pipeline, return line is connected with one-level absorption tower and second grade absorption tower respectively, cancel accident slurry system's design, effectively avoid causing the construction cycle extension because of the construction of solitary configuration accident slurry system, reduce the construction degree of difficulty and construction engineering volume greatly, from designing to construction material-saving engineering volume, still reduce the increase of on-the-spot construction when guaranteeing the time limit for a project quality, make the regional planning of wet flue gas desulfurization more normal, the fire control is examined and repaired the road more unobstructed. The method reduces the workload of corrosion, scaling and maintenance in the desulfurization system, reduces the workload of equipment maintenance and reduces the energy consumption of the desulfurization system.
2. The first-stage tower gypsum discharge pump and the second-stage gypsum discharge pump are connected with a desulfurization system through a third pipeline; be equipped with the return line on the third pipeline, the return line is connected with one-level absorption tower and second grade absorption tower respectively, has solved accident thick liquids system area big. The one-time cost is high, the later-stage operation and maintenance cost is also high, the accident slurry system of the desulfurization system is cancelled, the energy consumption of the desulfurization project is reduced, the overhaul project amount is reduced, and the land used by the desulfurization project is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a two-tower two-cycle desulfurization system;
in the figure: firstly, a first-stage absorption tower, secondly, a second-stage absorption tower, thirdly, a first-stage tower gypsum discharge pump A/B, fourthly, a second-stage tower gypsum discharge pump A/B, fifthly, a first-stage tower gypsum discharge pump A/B inlet pipeline and a valve, sixthly, gypsum slurry returns to a first-stage tower pipeline and a backflow port, seventhly, a second-stage tower gypsum discharge pump A/B inlet pipeline and a valve, eighthly, gypsum slurry returns to a second-stage tower pipeline and a backflow port, and ninthly, gypsum slurry reaches a desulfurization system pipeline and a valve.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, a double-tower double-circulation desulfurization system for eliminating an accident slurry system comprises a primary absorption tower and a secondary absorption tower, wherein the primary absorption tower is connected with a primary tower gypsum discharge pump through a first pipeline, and the secondary absorption tower is connected with a secondary gypsum discharge pump through a second pipeline; the first-stage tower gypsum discharge pump and the second-stage gypsum discharge pump are both connected with the desulfurization system through a third pipeline; and a reflux pipeline is arranged on the third pipeline and is respectively connected with the first-stage absorption tower and the second-stage absorption tower.
Furthermore, the reflux pipeline returns a pipeline of the primary absorption tower through gypsum slurry and is connected with the primary absorption tower, and the reflux pipeline returns a pipeline of the secondary absorption tower through gypsum slurry and is connected with the secondary absorption tower. The gypsum slurry return first-stage tower pipeline is connected with the gypsum slurry return second-stage absorption tower pipeline to form a passage, and the joint of the gypsum slurry return first-stage tower pipeline and the gypsum slurry return second-stage absorption tower pipeline is connected with a return pipeline.
Furthermore, a valve is arranged on the pipeline for returning the gypsum slurry to the primary absorption tower, and a valve is arranged on the pipeline for returning the gypsum slurry to the secondary absorption tower; the two valves are respectively positioned at two sides of the return pipeline.
Further, first pipeline includes one-level tower gypsum discharge pump A inlet pipeline and one-level tower gypsum discharge pump B inlet pipeline, and one-level tower gypsum discharge pump A inlet pipeline and one-level tower gypsum discharge pump B inlet pipeline all are equipped with the valve.
Further, the second pipeline includes second grade tower gypsum discharge pump A inlet pipeline and second grade tower gypsum discharge pump B inlet pipeline, and second grade tower gypsum discharge pump A inlet pipeline and second grade tower gypsum discharge pump B inlet pipeline all are equipped with the valve.
Further, the first-stage tower gypsum discharge pump comprises two pump bodies, namely a first pump body and a second pump body, wherein the first pump body and the second pump body are connected through a fourth pipeline, and the middle section of the fourth pipeline is connected to a third pipeline through a fifth pipeline; two valves are arranged at a position of the fourth pipeline, which is a set distance away from the middle section, and one valve is arranged on the fifth pipeline; a valve is arranged on the third pipeline at a set distance from the joint of the fifth pipeline and the third pipeline;
further, the second-stage tower gypsum discharge pump comprises two pump bodies, namely a third pump body and a fourth pump body, wherein the third pump body and the fourth pump body are connected through a sixth pipeline, and the middle section of the sixth pipeline is connected to a third pipeline through a seventh pipeline; two valves are arranged at a set distance from the sixth pipeline to the middle section, and one valve is arranged on the seventh pipeline;
furthermore, the backflow pipeline is arranged between the fifth pipeline and the seventh pipeline, two valves are arranged on the third pipeline at a set distance from the joint of the backflow pipeline and the third pipeline, and the two valves are located on two sides of the joint.
Further, the desulfurization system comprises a desulfurization multifunctional tower, the desulfurization multifunctional tower comprises a closed desulfurization system and an open desulfurization system which are switched to use, the closed desulfurization system comprises a sulfur excitation device, a sulfur absorption device and a circulating device, a liquid inlet of a spraying layer of the sulfur absorption device is connected with a hydrogen peroxide solution pool, the sulfur excitation device is arranged below the sulfur absorption device, a liquid inlet of the spraying layer of the sulfur excitation device is connected with a liquid outlet of the circulating device, and a liquid inlet of the circulating device is communicated with the bottom of the desulfurization multifunctional tower; the open desulfurization system comprises a sulfur excitation device and a sulfur absorption device in the closed desulfurization system, and further comprises a standby desulfurization device arranged above the sulfur absorption device, wherein the sulfur excitation device sprays a layer, the sulfur absorption device sprays a layer, and a liquid inlet of the spraying layer of the standby desulfurization device is communicated with a seawater inlet.
As shown in attached figure 1, in the double-tower double-circulation desulfurization system, the figure includes a first-stage absorption tower, a second-stage absorption tower, a first-stage tower gypsum discharge pump A/B, a second-stage tower gypsum discharge pump A/B, a first-stage tower gypsum discharge pump A/B inlet pipeline, a valve and the like, a gypsum slurry returning pipeline and a backflow port of the first-stage tower, a second-stage tower gypsum discharge pump A/B inlet pipeline, a valve and the like, a gypsum slurry returning pipeline and a backflow port of the second-stage tower, and a gypsum slurry returning pipeline and a valve from the gypsum slurry to the desulfurization system.
When the double-tower double-circulation system normally operates, starting a first-stage tower gypsum discharge pump to discharge fully oxidized gypsum slurry to a gypsum dehydration system, and starting a second-stage tower gypsum discharge pump to discharge second-stage tower gypsum slurry to a first-stage tower or a gypsum dehydration system; when the first-stage tower is in a maintenance state, gypsum slurry in the first-stage tower can be discharged to the second-stage tower through the gypsum discharge pump of the first-stage tower, the switching valve at the outlet of the gypsum discharge pump of the first-stage tower and the pipeline of the gypsum discharge pump of the first-stage tower, and the gypsum slurry is sent back to the first-stage tower through the gypsum discharge pump of the second-stage tower, the switching valve at the outlet of the gypsum discharge pump of the second-stage tower. On the contrary, when the secondary tower is overhauled, the gypsum slurry can be switched, stored and sent back through the primary gypsum discharge pump, the secondary gypsum discharge pump, the inlet and outlet pipelines and the valves.
Example 2
The present disclosure also provides a method for using a double-tower double-circulation desulfurization system without an accident slurry system, comprising:
when the double-tower double-circulation system normally operates, the first-stage tower gypsum discharge pump is started to discharge fully oxidized gypsum slurry to the gypsum dehydration system, and the second-stage tower gypsum discharge pump is started to discharge second-stage tower gypsum slurry to the first-stage tower or the gypsum dehydration system;
when the primary absorption tower is in a maintenance state, gypsum slurry in the primary absorption tower is discharged to the secondary absorption tower through a gypsum discharge pump of the primary absorption tower, a switching valve at an outlet of the gypsum discharge pump and a pipeline of the primary absorption tower, and after the primary absorption tower is repaired to be in failure, the gypsum slurry is sent back to the primary absorption tower through a gypsum discharge pump of the secondary absorption tower, the switching valve at the outlet of the gypsum discharge pump and the pipeline of the gypsum discharge pump;
when the secondary absorption tower is in a maintenance state, gypsum slurry is switched, stored and returned through a gypsum discharge pump of the secondary absorption, an inlet and outlet pipeline and a valve when the secondary absorption tower is maintained.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A cancel accident thick liquid system's two tower dual cycle desulfurization systems, its characterized in that includes: the device comprises a first-stage absorption tower and a second-stage absorption tower, wherein the first-stage absorption tower is connected with a first-stage tower gypsum discharge pump through a first pipeline, and the second-stage absorption tower is connected with a second-stage gypsum discharge pump through a second pipeline; the first-stage tower gypsum discharge pump and the second-stage gypsum discharge pump are both connected with the desulfurization system through a third pipeline; and a reflux pipeline is arranged on the third pipeline and is respectively connected with the first-stage absorption tower and the second-stage absorption tower.
2. The dual column dual cycle desulfurization system of claim 1, wherein said return line is connected to the primary absorber via a gypsum slurry return primary column line, and wherein the return line is connected to the secondary absorber via a gypsum slurry return secondary column line.
3. The double column double cycle desulfurization system of claim 1, wherein the gypsum slurry return primary column conduit is connected to the gypsum slurry return secondary absorption column conduit to form a passageway, and the return conduit is connected to the gypsum slurry return primary column conduit at the connection to the gypsum slurry return secondary absorption column conduit.
4. The dual-tower dual-cycle desulfurization system of claim 3, wherein the gypsum slurry return primary tower conduit is provided with a valve, and the gypsum slurry return secondary absorber tower conduit is provided with a valve; the two valves are respectively positioned at two sides of the return pipeline.
5. The dual tower dual cycle desulfurization system of claim 1, wherein said first conduit comprises a primary tower gypsum discharge pump a inlet conduit and a primary tower gypsum discharge pump B inlet conduit, both of which are valved.
6. The dual tower dual cycle desulfurization system of claim 1, wherein said second conduit comprises a secondary tower gypsum discharge pump a inlet conduit and a secondary tower gypsum discharge pump B inlet conduit, both of which are valved.
7. The dual-tower dual-cycle desulfurization system of claim 1, wherein the first-stage tower gypsum discharge pump comprises two pumps, namely a first pump and a second pump, which are connected by a fourth pipeline, and the middle section of the fourth pipeline is connected to the third pipeline by a fifth pipeline.
8. The dual-tower dual-cycle desulfurization system according to claim 7, wherein the secondary tower gypsum discharge pump comprises two pumps, namely a third pump and a fourth pump, which are connected by a sixth pipeline, and the middle section of the sixth pipeline is connected to the third pipeline by a seventh pipeline; the sixth pipeline is provided with two valves at a set distance from the middle section, and the seventh pipeline is provided with a valve.
9. The dual column dual cycle desulfurization system of claim 8, wherein the return line is disposed between the fifth line and the seventh line, and wherein two valves are disposed on the third line at a set distance from the junction of the return line and the third line, the two valves being located on either side of the junction.
10. A method of using the double column double cycle desulfurization system of any one of claims 1-9, comprising:
when the double-tower double-circulation system normally operates, the first-stage tower gypsum discharge pump is started to discharge fully oxidized gypsum slurry to the gypsum dehydration system, and the second-stage tower gypsum discharge pump is started to discharge second-stage tower gypsum slurry to the first-stage tower or the gypsum dehydration system;
when the primary absorption tower is in a maintenance state, discharging gypsum slurry in the primary absorption tower to the secondary absorption tower through a gypsum discharge pump and a reflux pipeline of the primary absorption tower, and after the primary absorption tower is repaired to be in a failure state, returning the gypsum slurry to the primary absorption tower through a gypsum discharge pump and a reflux pipeline of the secondary absorption tower;
when the secondary absorption tower is in the maintenance state, gypsum slurry in the secondary absorption tower is discharged to the primary absorption tower through a gypsum discharge pump and a reflux pipeline of the secondary absorption tower, and after the failure repair secondary absorption tower recovers to operate, the gypsum slurry is sent back to the secondary absorption tower through the gypsum discharge pump and the reflux pipeline of the primary absorption tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010995371.3A CN112058028B (en) | 2020-09-21 | 2020-09-21 | Double-tower double-circulation desulfurization system and method for eliminating accident slurry system |
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| CN202010995371.3A CN112058028B (en) | 2020-09-21 | 2020-09-21 | Double-tower double-circulation desulfurization system and method for eliminating accident slurry system |
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| CN112058028B CN112058028B (en) | 2021-09-28 |
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| JP2004344762A (en) * | 2003-05-22 | 2004-12-09 | Kawasaki Heavy Ind Ltd | Wet flue-gas desulfurizing method and wet flue-gas desulfurizing apparatus |
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| CN207042234U (en) * | 2017-07-31 | 2018-02-27 | 贵州黔东电力有限公司 | A kind of desulfurization slurry combined operation system |
| CN209108932U (en) * | 2018-09-27 | 2019-07-16 | 北京国电龙源环保工程有限公司 | The slurry dehydrating device of flue gas desulphurization system |
| CN210814627U (en) * | 2019-09-13 | 2020-06-23 | 赵红文 | Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower |
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2020
- 2020-09-21 CN CN202010995371.3A patent/CN112058028B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004344762A (en) * | 2003-05-22 | 2004-12-09 | Kawasaki Heavy Ind Ltd | Wet flue-gas desulfurizing method and wet flue-gas desulfurizing apparatus |
| CN201135853Y (en) * | 2007-12-24 | 2008-10-22 | 同方环境股份有限公司 | Desulfurizing device suitable for sulfurous anhydride varying at large scope |
| CN102921287A (en) * | 2012-10-30 | 2013-02-13 | 北京国电龙源环保工程有限公司 | Double-tower double-circulation limestone wet method desulfurization device and method |
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Denomination of invention: A Double Tower Double Circulation Desulfurization System and Method for Canceling Emergency Slurry System Effective date of registration: 20221228 Granted publication date: 20210928 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Changqing branch Pledgor: SHANDONG GUOSHUN CONSTRUCTION GROUP Co.,Ltd. Registration number: Y2022980029384 |