CN209978018U - Water feeding pump pipeline of three-pressure waste heat boiler - Google Patents
Water feeding pump pipeline of three-pressure waste heat boiler Download PDFInfo
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- CN209978018U CN209978018U CN201920310306.5U CN201920310306U CN209978018U CN 209978018 U CN209978018 U CN 209978018U CN 201920310306 U CN201920310306 U CN 201920310306U CN 209978018 U CN209978018 U CN 209978018U
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Abstract
The utility model relates to a three-pressure exhaust-heat boiler's feed pump pipeline. The utility model discloses a high-pressure line that is connected with the high-pressure steam pocket, the middling pressure pipeline that is connected with the middling pressure steam pocket, the low-pressure pipeline that is connected with the low-pressure steam pocket, high-pressure line includes the high-pressure economizer, the high-pressure water-feeding pump is connected with the low-pressure steam pocket, the middling pressure pipeline includes the middling pressure economizer, the middling pressure water-feeding pump is connected with the low-pressure steam pocket, the low-pressure pipeline includes the low-pressure economizer and congeals the pump, it connects the water supply end to congeal the pump, still include the high-pressure water-feeding pump and take a percentage the pipeline, the high-pressure water-feeding pump is taken a percentage pipeline one. The utility model has the advantages of the operation energy consumption of high and medium pressure feed water pump is comparatively saved, the water supply is adjusted in a flexible way, the unit operating stability is better.
Description
Technical Field
The utility model relates to a three pressure exhaust-heat boiler's feed pump pipeline belongs to power plant boiler equipment technical field.
Background
In the waste heat boiler, the feed water of the steam pocket is connected through a feed pump pipeline. The water feeding pump pipeline of the three-pressure waste heat boiler comprises a low-pressure pipeline 6 connected with a low-pressure steam drum 3, a medium-pressure pipeline 5 connected with the low-pressure steam drum 3 and a medium-pressure steam drum 2, and a high-pressure pipeline 4 connected with the low-pressure steam drum 3 and a high-pressure steam drum 1, wherein a high-pressure water feeding pump 42 is arranged on the high-pressure pipeline 4, a medium-pressure water feeding pump 52 is arranged on the medium-pressure pipeline 5, a condensing pump 62 is arranged on the low-pressure pipeline 6, and the condensing pump 62 is connected with a water feeding end 8 (shown in figure. As can be seen from fig. 1, the condensate pump 62 supplies water to the low-pressure steam drum 3, the high-pressure water supply pump 42 supplies water to the high-pressure steam drum 1 alone, and the medium-pressure water supply pump 52 supplies water to the medium-pressure steam drum 2 alone, and the water supply pump has the following disadvantages: the high-pressure and medium-pressure water feeding pumps supply water for the high-pressure and medium-pressure steam drums independently, and when the unit is in a low-load operation working condition, the high-pressure and medium-pressure water feeding pumps are low in operation efficiency and large in power consumption waste.
Disclosure of Invention
The utility model discloses mainly when solving the unit low-load operation that prior art exists high, the lower technological defect who brings the power consumption waste of operation efficiency of middling pressure feed water pump provides a high, the higher three pressure exhaust-heat boiler's of middling pressure feed water pump operation efficiency feed water pump pipeline.
The utility model discloses to above-mentioned technical problem mainly can solve through following technical scheme: the utility model discloses a high-pressure line that is connected with the high-pressure steam pocket, the middling pressure pipeline that is connected with the middling pressure steam pocket, the low-pressure pipeline that is connected with the low-pressure steam pocket, high-pressure pipeline is including the high-pressure economizer that exports and be connected with the high-pressure steam pocket, the high-pressure feed pump that exports and be connected with high-pressure economizer entry, high-pressure feed pump entry is connected with the low-pressure steam pocket, the middling pressure economizer that the middling pressure feed pipe way is connected with the middling pressure steam pocket is drawn together to the middling pressure economizer that exports and be connected with middling pressure economizer, export and the middling pressure feed pump of middling pressure economizer entry linkage, the middling pressure feed pump entry linkage is held for water, its characterized in that, the low-pressure feed pipe way is including the low-pressure economizer that the export is: the high-pressure water supply pump tap pipeline is connected with a tap outlet of the high-pressure water supply pump at one end and is connected with an inlet of the medium-pressure economizer at the other end.
Preferably, the high-pressure water-feeding pump tap pipeline is provided with a regulating valve, and the regulating valve controls the water-feeding flow of the high-pressure water-feeding pump tap pipeline.
Therefore, the utility model discloses rational in infrastructure has following advantage:
the utility model discloses in, through setting up the high pressure feed water pump pipeline of taking a percentage, the high pressure feed water pump accessible high pressure feed water pump takes a percentage the pipeline and provides the feedwater for the middling pressure steam pocket when satisfying the high pressure steam pocket feedwater demand, consequently:
1. when the unit runs under partial load, the medium-pressure water feeding pump can stop running, and the high-pressure steam drum and the medium-pressure steam drum are completely supplied with water by the high-pressure water feeding pump, so that the high-pressure water feeding pump has higher running efficiency, and the running power consumption is greatly saved;
2. in the operation process, when the medium-pressure water feed pump fails, the design margin of the high-pressure water feed pump can be used for providing water for the medium-pressure steam drum to maintain the basic operation of the medium-pressure system, so that the stability of the unit operation is better;
3. the high-pressure water-feeding pump tap pipeline is provided with the regulating valve, the water-feeding flow of the high-pressure water-feeding pump tap pipeline is controlled by the regulating valve, the operation load of the high-pressure water-feeding pump and the operation load of the medium-pressure water-feeding pump can be flexibly regulated according to the load condition of the unit when the unit operates, and the power consumption of the high-pressure water-feeding pump and the medium-pressure water-feeding pump.
Drawings
FIG. 1 is a schematic diagram of the prior art;
fig. 2 is a schematic diagram of the present invention.
Description of reference numerals: 1. a high pressure steam drum; 2. a medium pressure steam drum; 3. a low pressure steam drum; 4. a high pressure line; 41. a high-pressure economizer; 42. a high pressure feed pump; 5. a medium pressure pipeline; 51. a medium-pressure economizer; 52. a medium pressure feed pump; 6. a low pressure line; 61. a low-pressure economizer; 62. a coagulation pump; 7. a high-pressure water supply pump tap pipeline; 71. adjusting a valve; a water feed end 8.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example 1: as shown in the attached figure 2, the utility model comprises a high pressure pipeline 4 connected with a high pressure steam drum 1, a medium pressure pipeline 5 connected with a medium pressure steam drum 2, and a low pressure pipeline 6 connected with a low pressure steam drum 3;
the high-pressure pipeline 4 comprises a high-pressure economizer 41 of which the outlet is connected with the high-pressure steam drum 1, a high-pressure water feeding pump 42 of which the outlet is connected with the inlet of the high-pressure economizer 41, and the inlet of the high-pressure water feeding pump 42 is connected with the low-pressure steam drum 3;
the medium-pressure pipeline 5 comprises a medium-pressure economizer 51 of which the outlet is connected with the medium-pressure steam drum 2, a medium-pressure water feed pump 52 of which the outlet is connected with the inlet of the medium-pressure economizer 51, and the inlet of the medium-pressure water feed pump 52 is connected with the low-pressure steam drum 3;
the low-pressure pipeline 6 comprises a low-pressure economizer 61 of which the outlet is connected with the inlet of the low-pressure steam pocket 3, a condensing pump 62 of which the outlet is connected with the inlet of the low-pressure economizer 61, and the inlet of the condensing pump 62 is connected with the water supply end 8;
the high-pressure water-feeding pump tap pipeline 7 is connected between the tap outlet of the high-pressure water-feeding pump 42 and the inlet of the medium-pressure economizer 51, the high-pressure water-feeding pump tap pipeline 7 is provided with an adjusting valve 71, and the adjusting valve 71 controls the water-feeding flow of the high-pressure water-feeding pump tap pipeline 7.
The utility model discloses at the operation in-process of unit, when the unit high load operation: the high-pressure water feeding pump 42 sends the feed water from the low-pressure steam pocket 3 into the high-pressure steam pocket 1 through the high-pressure economizer 41, the medium-pressure water feeding pump 52 sends the feed water from the low-pressure steam pocket 3 into the medium-pressure steam pocket 2 through the medium-pressure economizer 51, when the feed water quantity required by the medium-pressure steam pocket 2 is large and the medium-pressure feed water pump 52 can not be completely met, part of the feed water provided by the high-pressure water feeding pump 42 enters the medium-pressure economizer 41 through the high-pressure feed water pump tap pipeline 7 and then is sent into the medium-pressure steam pocket 2;
when the unit is operated under partial load, 2 water supply schemes can be selected:
1) the operation of the medium-pressure water feed pump 52 is stopped, the high-pressure water feed pump 42 supplies water to the high-pressure steam pocket 1 through the high-pressure economizer 41, and meanwhile, the high-pressure water feed pump 42 supplies water to the medium-pressure steam pocket 2 through the high-pressure water feed pump tap pipeline 7 and the medium-pressure economizer 51;
2) the high-pressure feed water pump tap line 7 is blocked, the high-pressure feed water pump 42 supplies feed water to the high-pressure steam drum 1 via the high-pressure economizer 41, and the intermediate-pressure feed water pump 52 supplies feed water to the intermediate-pressure steam drum 2 via the intermediate-pressure economizer 51.
The two water supply schemes can be flexibly adjusted according to the running condition of the unit.
The utility model discloses when applying to 9F grade combined cycle unit:
1. the running power consumption of the high-pressure and medium-pressure feed water pumps is lower.
Because the type selection of the medium-pressure feed water pump is small, the operation efficiency of the medium-pressure feed water pump is closer to a high-efficiency point when the unit operates at a low load, and the operation power consumption is saved; the efficiency of the high-pressure water feed pump is generally 5% -10% higher than that of the medium-pressure water feed pump, when the unit load is higher, the high-pressure water feed pump bears part of the load of the medium-pressure water feed besides the load of the high-pressure water feed, and the high-pressure water feed pump has higher operation efficiency. Therefore, the power consumption of the high-pressure and medium-pressure feed water pump is obviously reduced.
The utility model discloses with prior art's operation power consumption contrast:
power consumption comparison table for operation of high and medium pressure water supply pump
2. The running stability and the adjusting performance of the unit are better.
When the unit operates, the medium-pressure water feeding pump breaks down, and the high-pressure water feeding pump can provide water for the medium-pressure steam drum, so that the stability of the unit operation is ensured; when the unit is in a partial load working condition, the high-pressure water supply pump can be selected to supply water to the medium-pressure steam drum, the medium-pressure pump can also be selected to supply water to the medium-pressure steam drum, and the water supply device can be flexibly adjusted according to the requirement, so that the water supply device can be more suitable for the load change of the unit.
Of course, the drawings and examples are only for the purpose of illustrating and explaining the present invention and should not be taken as unduly limiting the invention. All the technical solutions obtained by making equivalent adjustments and changes according to the present invention fall within the protection scope of the present invention.
Claims (2)
1. A water feeding pump pipeline of a three-pressure waste heat boiler comprises a high-pressure pipeline (4) connected with a high-pressure steam drum (1), a medium-pressure pipeline (5) connected with a medium-pressure steam drum (2), and a low-pressure pipeline (6) connected with a low-pressure steam drum (3), wherein the high-pressure pipeline (4) comprises a high-pressure economizer (41) of which the outlet is connected with the high-pressure steam drum (1), a high-pressure water feeding pump (42) of which the outlet is connected with the inlet of the high-pressure economizer (41), the inlet of the high-pressure water feeding pump (42) is connected with the low-pressure steam drum (3), the medium-pressure pipeline (5) comprises a medium-pressure economizer (51) of which the outlet is connected with the medium-pressure steam drum (2), a medium-pressure water feeding pump (52) of which the outlet is connected with the inlet of the medium-pressure economizer (51), and the inlet of the medium-pressure water feeding pump (52) is connected, the low-pressure pipeline (6) comprises a low-pressure economizer (61) with an outlet connected with the low-pressure steam pocket (3), a condensing pump (62) with an outlet connected with an inlet of the low-pressure economizer (61), and a water feeding end (8) connected with an inlet of the condensing pump (62), and is characterized in that: the high-pressure water supply system is characterized by further comprising a high-pressure water supply pump tap pipeline (7), wherein one end of the high-pressure water supply pump tap pipeline (7) is connected with a tap outlet of the high-pressure water supply pump (42), and the other end of the high-pressure water supply pump tap pipeline is connected with an inlet of the medium-pressure economizer (51).
2. The feed-water pump pipeline of the three-pressure waste heat boiler according to claim 1, characterized in that: the high-pressure water supply pump tap pipeline (7) is provided with an adjusting valve (71), and the adjusting valve (71) adjusts the water supply flow of the high-pressure water supply pump tap pipeline (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920310306.5U CN209978018U (en) | 2019-03-12 | 2019-03-12 | Water feeding pump pipeline of three-pressure waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920310306.5U CN209978018U (en) | 2019-03-12 | 2019-03-12 | Water feeding pump pipeline of three-pressure waste heat boiler |
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| CN209978018U true CN209978018U (en) | 2020-01-21 |
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| CN201920310306.5U Active CN209978018U (en) | 2019-03-12 | 2019-03-12 | Water feeding pump pipeline of three-pressure waste heat boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135858A (en) * | 2021-11-03 | 2022-03-04 | 中山嘉明电力有限公司 | Water feeding method and system applied to waste heat boiler |
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2019
- 2019-03-12 CN CN201920310306.5U patent/CN209978018U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135858A (en) * | 2021-11-03 | 2022-03-04 | 中山嘉明电力有限公司 | Water feeding method and system applied to waste heat boiler |
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