CN216171369U - Rapid bed building system for semidry desulfurization - Google Patents
Rapid bed building system for semidry desulfurization Download PDFInfo
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- CN216171369U CN216171369U CN202122376004.8U CN202122376004U CN216171369U CN 216171369 U CN216171369 U CN 216171369U CN 202122376004 U CN202122376004 U CN 202122376004U CN 216171369 U CN216171369 U CN 216171369U
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Abstract
The utility model relates to the technical field of flue gas treatment, in particular to a system for quickly building a bed for semidry desulfurization, which comprises the following components: the first dust remover group and the second dust remover group, each dust remover group corresponds to a boiler respectively, and each dust remover group comprises at least one dust remover. Through optimizing original ash conveying pipeline, increase the cross storehouse pipeline of connecting normal working form furnace storehouse pump and building bed state furnace storehouse pump, and set up building bed pneumatic control valve on crossing storehouse pipeline, whether control passes through the pneumatic conveying mode with the fly ash in the unit ash bucket, directly carry to waiting to start in the unit ash bucket, in order to shorten unit start initial stage ash bucket and hold grey process, reach the quick bed purpose of building, make desulfurizing tower export sulfur dioxide concentration reach the environmental protection index requirement, thereby can avoid about 10h sulfur dioxide time that exceeds standard, and with low costs to the equipment transformation.
Description
Technical Field
The utility model relates to the technical field of flue gas treatment, in particular to a system for quickly building a bed for semi-dry desulphurization.
Background
The semidry desulfurization of a thermal power generating set is one of main processes of thermal power desulfurization in China, and through application in recent years, the process is mature and can meet the requirement of ultra-clean discharge, but the desulfurization circulating ash in an ash hopper of a dust remover needs to be discharged completely after the set is stopped to avoid the desulfurization circulating ash hardening caused by long-term stop, and simultaneously, the waste of a desulfurizer in the circulating ash is also caused. At the initial stage of unit start, because the load is lower, the coal ash amount is less, the bed layer can not be established due to insufficient desulfurization circulating ash amount, and a window period exists for desulfurization flue gas emission, so that the concentration of sulfur dioxide at the outlet can not meet the environmental protection requirement. With the continuous strictness of the environmental protection requirement, the problem is more remarkable.
Documents of the prior art
Patent document 1: CN110465160A semi-dry desulfurization equipment
Patent document 2: CN111135686A semidry flue gas desulfurization device and desulfurization method
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for quickly building a bed for semi-dry desulphurization, which comprises:
the system comprises a first dust remover group and a second dust remover group, wherein each dust remover group corresponds to a boiler and comprises at least one dust remover;
the furnace bin pumps correspond to the dust collectors in the first dust collector group and the second dust collector group in number;
the furnace bin pump comprises an ash falling end, an input end and an output end, and the ash falling end of the furnace bin pump is correspondingly connected to the bottom of the dust remover and used for receiving mixed ash falling from the dust remover;
the ash discharge pipeline comprises branches with the number corresponding to that of the furnace chamber pumps, each branch comprises a first pipeline and a second pipeline, the first end of each first pipeline is connected with the gas storage tank, the second end of each first pipeline is connected with the gas inlet end of the furnace chamber pump, the first end of each second pipeline is connected to the gas outlet end of the corresponding pipeline chamber pump, the second end of each second pipeline is connected to the ash storage, and the branches are connected in parallel and used for conveying mixed ash in the furnace chamber pumps to the ash storage;
wherein, along the flowing direction of the gas in the ash discharge pipeline, the input end of each furnace chamber pump is provided with an input side pneumatic control valve, and the output end is provided with an output side pneumatic control valve;
and a bin crossing pipeline is arranged on the ash discharge pipeline, the first end of the bin crossing pipeline is arranged at the input side of the pneumatic control valve at the output side corresponding to the furnace bin pump, the second end of the bin crossing pipeline is connected to the dust remover in the second dust remover group, and a bed building pneumatic control valve is arranged on the bin crossing pipeline.
Preferably, the number of the cross-bin pipelines corresponds to the number of the dust remover groups.
Preferably, the bin crossing pipeline comprises a first bin crossing pipeline and a second bin crossing pipeline, a first end of the first bin crossing pipeline is arranged at the input side of the pneumatic control valve at the output side in the first dust remover group, and a second end of the first bin crossing pipeline is connected to the second dust remover group; the first end of the second cross-bin pipeline is arranged on the input side of the pneumatic control valve on the output side in the second dust collector group, and the second end of the second cross-bin pipeline is connected to the first dust collector group.
Preferably, the first cross-bin conduit is connected to each dust remover in the first dust remover group.
Preferably, the cross-bin pipeline is connected to the upper part of an ash hopper of the dust remover.
Preferably, a first end of the cross-bin pipeline is connected to the input side of the output side pneumatic control valve in one dust collector group, and a second end of the cross-bin pipeline is connected to at least two dust collector groups.
Preferably, a first end of the cross-bin pipeline is connected to the input side of the output side pneumatic control valve in at least two dust collector groups, and a second end of the cross-bin pipeline is connected to one dust collector group.
Preferably, the ash discharge pipeline comprises an input main line, and input branches and output branches, the number of the input branches corresponds to that of each dust remover group, the input branches are connected to the output side of the input main line, and the input branches are connected in series with each furnace chamber pump of each dust remover group and connected to the ash storage through the output branches.
Preferably, the ash discharge pipeline further comprises a fluidization pipeline connected to the bottom of each silo pump for inputting fluidization gas into the silo pump.
Preferably, the ash discharge pipeline further comprises a cleaning pipeline which is connected with the input branch in parallel and used for inputting cleaning gas to the output branch.
Compared with the prior art, the utility model has the advantages that;
through optimizing original ash conveying pipeline, increase the cross storehouse pipeline of connecting normal working form furnace storehouse pump and building bed state furnace storehouse pump, and set up building bed pneumatic control valve on crossing storehouse pipeline, whether control passes through the pneumatic conveying mode with the fly ash in the unit ash bucket, directly carry to waiting to start in the unit ash bucket, in order to shorten unit start initial stage ash bucket and hold grey process, reach the quick bed purpose of building, make desulfurizing tower export sulfur dioxide concentration reach the environmental protection index requirement, thereby can avoid about 10h sulfur dioxide time that exceeds standard, and with low costs to the equipment transformation.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a rapid bed building of a desulfurization tower according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the utility model. It should be understood that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways for a semi-dry desulfurization rapid bed building system, as the disclosed concepts and embodiments are not limited to any implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
At present, a thermal generator set generally comprises more than two boilers, wherein each boiler corresponds to one dust remover group, each dust remover group comprises at least one dust remover, and desulfurization circulating ash in an ash hopper of the dust remover needs to be discharged completely after the set is stopped to prevent the desulfurization circulating ash from being hardened due to long-term stop. At the initial stage of unit starting, because the load is lower, the coal ash amount is less, and the bed layer can not be established in delay due to insufficient desulfurization circulating ash amount, the concentration of sulfur dioxide at the outlet can not reach the environmental protection requirement. The utility model aims to solve the problem of environmental protection exceeding caused by the fact that a desulfurizing tower cannot build a bed quickly at the initial starting stage of a unit by conveying desulfurization circulating ash accumulated in an operating unit to an ash hopper of a bag-type dust collector of the unit to be started in a pneumatic conveying mode.
Referring to fig. 1, the present invention aims to provide a rapid bed building system for semi-dry desulfurization, which takes two sets of two dust collectors (a first dust collector set 61 and a second dust collector set 62) of a boiler as an example. Each dust remover group corresponds to different boilers respectively and is used for removing dust of the smoke in the corresponding boiler and reserving mixed ash containing raw smoke ash, desulfurization reaction products and unreacted slaked lime.
The bottom of each dust remover is provided with a furnace chamber pump 5, the furnace chamber pump 5 comprises a dust falling end, an input end and an output end, part of mixed ash in the dust remover is conveyed to the desulfurizing tower through the conveying chute, and part of mixed ash enters the furnace chamber pump 5 from the dust falling end and is conveyed to the ash chamber 9. Specifically, gas holder 1 is connected to the first end of ash discharge pipe 2, and ash storehouse 9 is connected to the second end, and ash discharge pipe 2 includes the branch road that corresponds quantity with furnace storehouse pump 5, and every branch road includes first pipeline and second pipeline, and gas holder 1 is connected to the first end of first pipeline, and furnace storehouse pump 5's inlet end is connected to the second end, and the first end of second pipeline is connected to way storehouse pump 5's exhaust end, and the second end is connected to ash storehouse 9, and parallelly connected between each branch road for carry the mixed ash in the furnace storehouse pump 5 to ash storehouse 9.
As shown in fig. 1, further, an input side pneumatic control valve 31 is provided at an input end of each silo pump 5 along a flow direction of the ash discharge pipeline 2, an output side pneumatic control valve 34 is provided at an output end, a cross-silo pipeline is provided on the ash discharge pipeline 2, a first end of the cross-silo pipeline is provided at an input side of the output side pneumatic control valve 34 in a first dust collector group 61 (a boiler in a normal operation state), and a second end of the cross-silo pipeline is connected to a second dust collector group 62 (a boiler in a bed building state), wherein a bed building pneumatic control valve 41 is provided on the cross-silo pipeline.
Thus, the bed building pneumatic control valve 41 and the output side pneumatic control valve 34 respectively control the flow direction of the mixed ash output from the silo pump 5, and when the bed building pneumatic control valve 41 is opened and the output side pneumatic control valve 34 is closed, the mixed ash output from the silo pump 5 is input to the second dust collector group 62 (the boiler in a bed building state) along a cross-silo pipeline; when the bed building pneumatic control valve 41 is closed and the output side pneumatic control valve 34 is opened, the mixed ash output by the furnace chamber pump 5 is conveyed to the ash storage 9 along the output branch.
In an alternative embodiment, as shown in fig. 1, each dust remover group corresponds to one cross-bin pipeline, each dust remover group comprises at least two dust removers, and the cross-bin pipeline is connected to each dust remover.
Specifically, the dust remover comprises a first dust remover group 61 and a second dust remover group 62, the bin crossing pipeline comprises a first bin crossing pipeline 7 and a second bin crossing pipeline 8, a first end of the first bin crossing pipeline 7 is arranged on the input side of the output side pneumatic control valve 34 in the first dust remover group 61, a second end of the first bin crossing pipeline 7 is connected to the second dust remover group 62, a first end of the second bin crossing pipeline 8 is arranged on the input side of the output side pneumatic control valve 34 in the second dust remover group 62, and a second end of the second bin crossing pipeline 8 is connected to the first dust remover group 61.
Similarly, the dust remover comprises a first dust remover group, a second dust remover group and a third dust remover group, the bin crossing pipeline comprises a first bin crossing pipeline, a second bin crossing pipeline and a third bin crossing pipeline, the first end of the first bin crossing pipeline is arranged on the input side of the output side pneumatic control valve in the first dust remover group, the second end of the first bin crossing pipeline is connected to the second dust remover group, the first end of the second bin crossing pipeline is arranged on the input side of the output side pneumatic control valve in the second dust remover group, the second end of the second bin crossing pipeline is connected to the third dust remover group, the first end of the third bin crossing pipeline is arranged on the input side of the output side pneumatic control valve in the third dust remover group, and the second end of the third bin crossing pipeline is connected to the first dust remover group.
Thus, a one-to-one corresponding cross-cabin quick bed building mode is formed.
In other embodiments, a first end of the cross-bin line is connected to the input side of the output side pneumatic control valve 34 in one dust collector bank, and a second end of the cross-bin line is connected to at least two dust collector banks. In this way, more than one set of dust collectors can be used to build a bed.
In an alternative embodiment, a first cross-bin conduit is connected to each precipitator in the first precipitator bank 61.
Further, a first end of the cross-bin pipeline is connected to the input side of the output side pneumatic control valve 34 in at least two dust collector groups, and a second end of the cross-bin pipeline is connected to one dust collector group. Therefore, a group of dust collectors which are in a bed building state can be built through a plurality of groups of dust collectors in a running state, and the bed building speed is improved.
In the above embodiment, the cross-bin line is connected to the upper portion of the hopper of the dust collector 6.
The ash discharge pipeline comprises an input main line, and input branches and output branches, the number of the input branches corresponds to that of each dust remover group 6, the input branches are connected to the output side of the input main line, the input branches are connected with each furnace chamber pump of each dust remover group in series, and the input branches are connected to the ash storage through the output branches.
Further, the ash discharge line 2 further comprises a fluidization conduit connected to the bottom of each silo pump for feeding fluidization gas into the silo pumps. The ash discharge pipeline 2 further comprises a cleaning pipeline which is connected with the input branch in parallel and used for inputting cleaning gas to the output branch.
Referring to fig. 1, in an alternative embodiment, the first input branch 21 and the second input branch 22 are respectively connected to the bin pumps 5 of the first dust collector group and the second dust collector group, an input side pneumatic control valve 31 is disposed on the first input branch 21, a fluidizing gas branch is disposed on each of one sides of the first input branch 21 and the second input branch 22, a fluidizing gas pneumatic control valve 32 is disposed on the fluidizing gas branch, and a cleaning pipeline is further disposed on the cleaning pipeline, and a cleaning gas control valve 33 is disposed on the cleaning pipeline.
The pneumatic input-side control valve 31, the pneumatic fluidizing control valve 32 and the pneumatic cleaning control valve 33 in the first dust collector group form a first front-side valve group 301, and the pneumatic input-side control valve 31, the pneumatic fluidizing control valve 32 and the pneumatic cleaning control valve 33 in the second dust collector group form a second front-side valve group 302.
The cleaning pipeline is also provided with a cross-bin manual valve 42 and a cross-bin check valve 43 which are connected with the cross-bin pipeline and used for cleaning the cross-bin pipeline; the cleaning pipeline is also provided with a manual valve 35 and a check valve 36 which are connected with the output branch and used for cleaning the output branch.
The bed building valve set is formed by a bed building pneumatic control valve 41, a bin-crossing manual valve 42 and a bin-crossing check valve 43, and comprises a first bed building valve set 401 and a second bed building valve set 402. The output-side pneumatic control valve 34 forms a rear-side valve group including a first rear-side valve group 303 and a second rear-side valve group 304 together with the manual valve 35 and the check valve 36.
By combining the above embodiments, the utility model optimizes the original ash conveying pipeline, adds the cross-bin pipeline connecting the normal working state furnace bin pump and the bed building state furnace bin pump, and sets the bed building pneumatic control valve on the cross-bin pipeline to control whether the fly ash in the ash bucket of one unit is directly conveyed to the ash bucket of the unit to be started in a pneumatic conveying mode, so as to shorten the ash storage process of the ash bucket at the initial starting stage of the unit, achieve the purpose of quickly building the bed, enable the concentration of sulfur dioxide at the outlet of the desulfurizing tower to reach the requirement of environmental protection indexes, avoid the exceeding time of the sulfur dioxide of about 10 hours and reduce the equipment modification cost.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A quick bed building system for semi-dry desulphurization is characterized by comprising:
the system comprises a first dust remover group and a second dust remover group, wherein each dust remover group corresponds to a boiler and comprises at least one dust remover;
the furnace bin pumps correspond to the dust collectors in the first dust collector group and the second dust collector group in number;
the furnace bin pump comprises an ash falling end, an input end and an output end, and the ash falling end of the furnace bin pump is correspondingly connected to the bottom of the dust remover and used for receiving mixed ash falling from the dust remover;
the ash discharge pipeline comprises branches with the number corresponding to that of the furnace chamber pumps, each branch comprises a first pipeline and a second pipeline, the first end of each first pipeline is connected with the gas storage tank, the second end of each first pipeline is connected with the gas inlet end of the furnace chamber pump, the first end of each second pipeline is connected to the gas outlet end of the corresponding pipeline chamber pump, the second end of each second pipeline is connected to the ash storage, and the branches are connected in parallel and used for conveying mixed ash in the furnace chamber pumps to the ash storage;
wherein, along the flowing direction of the gas in the ash discharge pipeline, the input end of each furnace chamber pump is provided with an input side pneumatic control valve, and the output end is provided with an output side pneumatic control valve;
and a bin crossing pipeline is arranged on the ash discharge pipeline, the first end of the bin crossing pipeline is arranged at the input side of the pneumatic control valve at the output side corresponding to the furnace bin pump, the second end of the bin crossing pipeline is connected to the dust remover in the second dust remover group, and a bed building pneumatic control valve is arranged on the bin crossing pipeline.
2. The system for semi-dry desulfurization rapid bed building according to claim 1, wherein the number of the cross-bin pipelines corresponds to the number of the dust collector groups.
3. The system for semi-dry desulfurization rapid bed building according to claim 2, wherein the cross-bin pipeline comprises a first cross-bin pipeline and a second cross-bin pipeline, a first end of the first cross-bin pipeline is arranged at the input side of the pneumatic control valve at the output side of the first dust collector group, and a second end of the first cross-bin pipeline is connected to the second dust collector group; the first end of the second cross-bin pipeline is arranged on the input side of the pneumatic control valve on the output side in the second dust collector group, and the second end of the second cross-bin pipeline is connected to the first dust collector group.
4. The system for semi-dry desulfurization flash bed building according to claim 3, wherein the first cross-bin pipe is connected to each dust remover of the first dust remover group.
5. The system for semi-dry desulfurization rapid bed building according to claim 1, wherein the cross-bin pipeline is connected to an upper portion of an ash hopper of the dust remover.
6. The system for semi-dry desulfurization rapid bed building according to claim 1, wherein a first end of the cross-bin pipeline is connected to an input side of the output-side pneumatic control valve in one dust collector group, and a second end of the cross-bin pipeline is connected to at least two dust collector groups.
7. The system for semi-dry desulfurization rapid bed building according to claim 1, wherein a first end of the cross-bin pipeline is connected to an input side of the pneumatic control valve on the output side in at least two dust collector groups, and a second end of the cross-bin pipeline is connected to one dust collector group.
8. The system for semi-dry desulfurization rapid bed building according to any one of claims 1 to 7, wherein the ash discharge pipeline comprises an input trunk, and a number of input branches and output branches corresponding to each dust collector group, the input branches are connected to the output side of the input trunk, the input branches are connected in series with each furnace chamber pump of each dust collector group, and are connected to an ash storage through the output branches.
9. The system for semi-dry desulfurization rapid bed building according to claim 8, wherein the ash discharge pipeline further comprises a fluidization conduit connected to the bottom of each silo pump for feeding fluidization gas into the silo pump.
10. The system for semi-dry desulfurization and rapid bed building according to claim 8, wherein the ash discharge pipeline further comprises a cleaning pipeline connected in parallel with the input branch for inputting cleaning gas to the output branch.
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| CN202122376004.8U CN216171369U (en) | 2021-09-29 | 2021-09-29 | Rapid bed building system for semidry desulfurization |
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| CN202122376004.8U CN216171369U (en) | 2021-09-29 | 2021-09-29 | Rapid bed building system for semidry desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856447A (en) * | 2021-09-29 | 2021-12-31 | 国能龙源环保南京有限公司 | Rapid bed building system for semidry desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856447A (en) * | 2021-09-29 | 2021-12-31 | 国能龙源环保南京有限公司 | Rapid bed building system for semidry desulfurization |
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