CN210229611U - Flue gas desulfurization system - Google Patents
Flue gas desulfurization system Download PDFInfo
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- CN210229611U CN210229611U CN201920979289.4U CN201920979289U CN210229611U CN 210229611 U CN210229611 U CN 210229611U CN 201920979289 U CN201920979289 U CN 201920979289U CN 210229611 U CN210229611 U CN 210229611U
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Abstract
The utility model provides a flue gas desulfurization system, including the absorption tower, absorption tower bottom feed inlet passes through pipe connection limestone milk pump discharge end, limestone milk pump feed end passes through pipe connection limestone milk jar, absorption tower bottom discharge gate is connected with first circulation pump group and second circulation pump group respectively through the pipeline, the top spray layer is provided with first shower set and second shower set in the absorption tower, the shower of first shower set corresponds with the circulating pump of first circulation pump group through the pipeline and is connected, the shower of second shower set corresponds with the circulating pump of second circulation pump group through the pipeline and is connected, the second shower set is higher than first shower set, the charge-in pipeline of the circulating pump of second circulation pump group adds the discharge end of pipe connection lime milk pump through alkali lye, the feed end of lime milk pump passes through pipe connection lime milk jar, the utility model discloses a dual power of lime milk pump and circulating pump and the design of higher shower can reach better desulfurization effect.
Description
Technical Field
The utility model belongs to the technical field of flue gas desulfurization, concretely relates to flue gas desulfurization system.
Background
The traditional method for desulfurizing flue gas is CaCO3Limestone slurry prepared from powder and water is used as a desulfurizer to be added into the absorption tower, and is mixed with SO in the flue gas2The reaction can achieve the desulfurization effect. However, when the sulfur content of the flue gas is higher, the pH value in the tower is rapidly lower, and when the pH value is lower than 3.5, the desulfurization efficiency of the absorption tower is rapidly reduced. In order to meet the requirement of environmental protection, alkali liquor is required to be added into the absorption tower to increase the pH value, so that the desulfurization efficiency is improved. The traditional way to improve the desulfurization efficiency is to increase the pH of the circulating slurry in the absorption tower by increasing the flow rate of the limestone milk pump and adding the limestone milk pump. However, the pH value of limestone milk is 6.5-7 in the first mode, so that the limestone milk is only suitable for running under normal working conditions and cannot adapt to working conditions with large fluctuation, and the pH value of circulating slurry is slowly increased and the desulfurization efficiency is not obviously improved in the second mode because the volume of the slurry in the absorption tower is large. Therefore, the development of a flue gas desulfurization system with high desulfurization efficiency is a need for further development of the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough and provide a flue gas desulfurization system of prior art, thereby can reach better desulfurization effect through the dual power of lime breast pump and circulating pump and the design of higher shower.
The technical scheme of the utility model as follows: a flue gas desulfurization system comprises an absorption tower, wherein a flue gas inlet and a flue gas outlet are formed in the absorption tower, a feed inlet at the bottom of the absorption tower is connected with a discharge end of a limestone milk pump through a pipeline, the feed end of the limestone milk pump is connected with a limestone milk tank through a pipeline, and a discharge outlet at the bottom of the absorption tower is respectively connected with a first circulating pump group and a second circulating pump group through pipelines;
a first spraying pipe group and a second spraying pipe group are arranged on a spraying layer at the top in the absorption tower, a spraying pipe of the first spraying pipe group is correspondingly connected with a circulating pump of a first circulating pump group through a pipeline, a spraying pipe of the second spraying pipe group is correspondingly connected with a circulating pump of a second circulating pump group through a pipeline, and the second spraying pipe group is higher than the first spraying pipe group;
a feed pipeline of a circulating pump of the second circulating pump group is connected with a discharge end of a lime milk pump through an alkali liquor adding pipeline, a feed end of the lime milk pump is connected with a lime milk tank through a pipeline, and an alkali liquor adding valve is installed on the alkali liquor adding pipeline;
and a pH meter is arranged on any pipeline connected with a circulating pump of the first circulating pump group and a spray pipe of the first spray pipe group.
Preferably, the first and second circulating pump groups are respectively provided with 2 circulating pumps.
Preferably, the pipeline of the absorption tower connected with the first circulating pump group and the second circulating pump group is provided with a regulating valve.
Preferably, the pH meter is intelligently connected with the limestone milk pump, the lime milk pump and the alkali liquor adding valve through a PLC.
The utility model has the advantages that:
(1) by adding the circulating pump and the alkali liquor adding valve, under the dual action of the driving force provided by the lime breast pump and the suction force provided by the circulating pump, the slurry volume provided by the lime breast pump is larger than the rated flow of the pump, and more alkali liquor can be provided, so that the pH value of the circulating slurry can be conveniently improved, and a better desulfurization effect can be obtained;
(2) the utility model discloses lime breast thick liquid mixes in higher second shower nest through second circulating pump group and circulation thick liquid, and it is long with flue gas contact time to spray the in-process downwards to can reach better desulfurization effect.
Drawings
Fig. 1 is a front view of the present invention;
in the figure: 1. absorption tower, 2, lime stone breast pump, 3, lime stone breast jar, 4, first circulating pump, 5, second circulating pump, 6, first shower, 7, second shower, 8, alkali lye addition pipeline, 9, lime breast pump, 10, lime breast jar, 11, alkali lye addition valve, 12, pH meter, 13, governing valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a flue gas desulfurization system comprises an absorption tower 1, wherein a flue gas inlet and a flue gas outlet are arranged on the absorption tower 1, a feed inlet at the bottom of the absorption tower 1 is connected with a discharge end of a limestone breast pump 2 through a pipeline, a feed end of the limestone breast pump 2 is connected with a limestone breast tank 3 through a pipeline, and a discharge outlet at the bottom of the absorption tower 1 is respectively connected with a first circulating pump 4 group and a second circulating pump 5 group through pipelines;
a spraying layer at the top in the absorption tower 1 is provided with a first spraying pipe 6 group and a second spraying pipe 7 group, the spraying pipes of the first spraying pipe 6 group are correspondingly connected with a circulating pump of a first circulating pump 4 group through pipelines, the spraying pipes of the second spraying pipe 7 group are correspondingly connected with a circulating pump of a second circulating pump 5 group through pipelines, and the second spraying pipe 7 group is higher than the first spraying pipe 6 group;
a feed pipeline of the circulating pump of the second circulating pump 5 group is connected with a discharge end of a lime milk pump 9 through an alkali liquor adding pipeline 8, a feed end of the lime milk pump 9 is connected with a lime milk tank 10 through a pipeline, and an alkali liquor adding valve 11 is installed on the alkali liquor adding pipeline 8;
and a pH meter 12 is arranged on any pipeline connected with the circulating pump of the first circulating pump 4 group and the spraying pipe of the first spraying pipe 6 group.
In the embodiment, the lime milk slurry is mixed with the circulating alkali liquor in the spray pipes of the higher second spray pipe 7 group through the circulating pumps of the second circulating pump 5 group, and the contact time with the flue gas is long in the downward spraying process, so that a better desulfurization effect can be achieved;
the 4 groups of the first circulating pumps and the 5 groups of the second circulating pumps are respectively provided with 2 circulating pumps, so that the cost is saved when the supply amount of limestone emulsion and lime emulsion is ensured;
a regulating valve 13 is arranged on a pipeline of the absorption tower 1 connected with the first circulating pump 4 group and the second circulating pump 5 group and is used for controlling flow;
the pH meter 12 is intelligently connected with the limestone milk pump 2, the lime milk pump 9 and the alkali liquor adding valve 11 through a PLC, the limestone milk pump 2 and the lime milk pump 9 are common delivery pumps on the market, and the frequency of the variable frequency motors of the limestone milk pump 2 and the lime milk pump 9 and the opening and closing of the alkali liquor adding valve 11 are controlled through the PLC according to the detected pH value of the circulating alkali liquor of the pH meter 12, so that the intelligent addition of limestone slurry and lime milk slurry is realized.
The utility model discloses a working process:
the pH meter 12 arranged on any pipeline connected with the circulating pump of the first circulating pump 4 group and the spraying pipe of the first spraying pipe 6 group is used for detecting the pH value of the circulating slurry, controlling the conveying amount of the limestone slurry through the linkage of the pH value and the limestone slurry pump 2 (controlling the motor frequency of the limestone slurry pump 2 through a PLC), controlling the pH value of the circulating slurry within a certain range, and when SO is contained in the flue gas2When the concentration is increased rapidly, the pH value is reduced rapidly, the limestone milk pump 2 is fully opened (the motor frequency is highest), the pH value is still reduced, when the pH value is lower than 3.5, the pH value is interlocked with the lime milk pump 9 and the alkali liquor adding valve 11 (the motor frequency of the lime milk pump 9 and the opening and closing of the alkali liquor adding valve 11 are controlled by a PLC), the alkali liquor adding valve 11 at the outlet of the lime milk pump 9 is opened, the lime milk pump 9 is fully opened (the motor frequency is highest), lime milk liquid (the pH value is 12-14) and circulating alkali liquor are fully mixed in the shell of the second circulating pump 5 and the second spraying pipe 7, the pH value of the spraying alkali liquor is increased rapidly, and therefore the overall desulfurization efficiency is improved;
when the pH value detected by the pH meter 12 reaches 7, the pH value is controlled by interlocking with the limestone milk pump 2, the lime milk pump 9 and the alkali liquor adding valve 11, the running frequency of the limestone milk pump 2 is reduced to 5Hz (anti-blocking setting), the running frequency of the lime milk pump 9 is reduced to 5Hz (anti-blocking setting), and the alkali liquor adding valve 11 is opened;
after the lime milk pump 9 is started, when the pH value is higher than 5.3 and lower than 7.0, the lime milk pump 2 cannot be closed, and the lime milk liquid is continuously conveyed into the tower to reduce the using amount of the lime milk;
the pH value may be set according to actual conditions.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a flue gas desulfurization system, includes absorption tower (1), be provided with flue gas inlet and exhanst gas outlet on absorption tower (1), its characterized in that: a feed inlet at the bottom of the absorption tower (1) is connected with a discharge end of a limestone breast pump (2) through a pipeline, the feed end of the limestone breast pump (2) is connected with a limestone breast tank (3) through a pipeline, and a discharge outlet at the bottom of the absorption tower (1) is respectively connected with a first circulating pump (4) group and a second circulating pump (5) group through pipelines;
a first spraying pipe (6) group and a second spraying pipe (7) group are arranged on a spraying layer at the top in the absorption tower (1), the spraying pipes of the first spraying pipe (6) group are correspondingly connected with a circulating pump of the first circulating pump (4) group through pipelines, the spraying pipes of the second spraying pipe (7) group are correspondingly connected with a circulating pump of the second circulating pump (5) group through pipelines, and the second spraying pipe (7) group is higher than the first spraying pipe (6) group;
a feed pipeline of the circulating pump of the second circulating pump (5) group is connected with a discharge end of a lime milk pump (9) through an alkali liquor adding pipeline (8), a feed end of the lime milk pump (9) is connected with a lime milk tank (10) through a pipeline, and an alkali liquor adding valve (11) is installed on the alkali liquor adding pipeline (8);
and a pH meter (12) is arranged on any pipeline connected with the circulating pump of the first circulating pump (4) group and the spraying pipe of the first spraying pipe (6) group.
2. The flue gas desulfurization system of claim 1, wherein: the first circulating pump (4) group and the second circulating pump (5) group are respectively provided with 2 circulating pumps.
3. The flue gas desulfurization system of claim 1, wherein: and the absorption tower (1) is provided with an adjusting valve (13) on a pipeline connected with the first circulating pump (4) group and the second circulating pump (5) group.
4. The flue gas desulfurization system of claim 1, wherein: the pH meter (12) is intelligently connected with the limestone milk pump (2), the lime milk pump (9) and the alkali liquor adding valve (11) through a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979289.4U CN210229611U (en) | 2019-06-26 | 2019-06-26 | Flue gas desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979289.4U CN210229611U (en) | 2019-06-26 | 2019-06-26 | Flue gas desulfurization system |
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| CN210229611U true CN210229611U (en) | 2020-04-03 |
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| CN201920979289.4U Active CN210229611U (en) | 2019-06-26 | 2019-06-26 | Flue gas desulfurization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246735A (en) * | 2022-08-01 | 2022-10-28 | 河北浩锐陶瓷制品有限公司 | Production process of energy-saving environment-friendly ceramic tile |
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2019
- 2019-06-26 CN CN201920979289.4U patent/CN210229611U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246735A (en) * | 2022-08-01 | 2022-10-28 | 河北浩锐陶瓷制品有限公司 | Production process of energy-saving environment-friendly ceramic tile |
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