CN212406837U - Condensate water combined circulation system for improving cold and steam supply capacity of boiler - Google Patents
Condensate water combined circulation system for improving cold and steam supply capacity of boiler Download PDFInfo
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- CN212406837U CN212406837U CN202021870242.3U CN202021870242U CN212406837U CN 212406837 U CN212406837 U CN 212406837U CN 202021870242 U CN202021870242 U CN 202021870242U CN 212406837 U CN212406837 U CN 212406837U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000002955 isolation Methods 0.000 claims abstract description 39
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000008676 import Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
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Abstract
The utility model discloses a promote condensate water combined cycle system of cold vapour ability of supplying again of boiler, including steam conduit isolation valve, heat recovery heat exchanger, flow control orifice plate, the isolation valve that intakes, play water isolation valve, bypass isolation valve, water-water heat exchanger, circulating pump. Cold re-steam enters the heat recovery heat exchanger through a steam pipeline, the cold re-steam is mixed with original steam through the steam re-steam pipeline after heat exchange and temperature reduction, a flow regulating pore plate is newly arranged on the cold re-steam pipeline to balance the steam flow, and closed circulating water absorbs heat in the heat recovery device and is conveyed to the water-water heat exchanger through a circulating pump. The condensate water at the outlet of the shaft seal heater enters the water-water heat exchanger after passing through the water inlet isolation valve, the system can effectively improve the cold re-industrial steam supply capacity of the boiler, reduce the over-temperature risk of the boiler reheater, can be put into operation and shut down on line, and can effectively improve the cold re-steam supply flow of the unit so as to improve the economical efficiency of the unit.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of the energy is used multipurposely, a promote condensate water combined cycle system of cold vapour ability of supplying again of boiler is related to.
[ background of the invention ]
The external industrial steam supply can effectively reduce the energy consumption index of the thermal power generator set and is one of the important profit directions of the power generator set. On the basis of meeting the requirements of industrial steam supply users on steam parameters, steam with lower quality is used as much as possible, so that economic operation of a unit is facilitated. Therefore, the direction of improving the industrial steam supply economy of the unit is to increase the industrial steam supply and reduce the steam supply parameters as much as possible.
At present, cold reheat steam is used as a steam source more in industrial steam supply units, but if the cold reheat steam is extracted more, the danger of overtemperature is easy to appear in a boiler reheater, so the extraction amount of the cold reheat steam of a plurality of units is greatly restricted, the requirements of users cannot be completely met, the heat supply economical efficiency of the units is poor only due to the fact that the reheat steam with higher steam quality can be utilized, the temperature of the cold reheat steam is generally higher than the requirements of the users by dozens of degrees centigrade, and a large amount of spraying desuperheating water is needed for desuperheating. If through technical means, the temperature of cold reheat steam is rationally reduced, and unnecessary heat is transferred to low pressure feed water heater and make full use of, then can effectively reduce the risk of boiler reheater overtemperature to can increase the supply steam volume of unit cold reheat by a wide margin.
[ summary of the invention ]
An object of the utility model is to solve the problem among the prior art, provide a condensate water combined cycle system who promotes the cold ability of supplying steam again of boiler, the utility model discloses use low pressure feed water import condensate to cool off the cold steam again of source cooling part, reduce the cold temperature of re-steaming of unit, reduce the boiler re-heater overtemperature risk, promote cold ability of supplying steam of industry again.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a condensation water combined cycle system for improving the cold and steam supply capacity of a boiler comprises a high-pressure cylinder, a steam pipeline and a steam return pipeline;
cold re-steam of the high-pressure cylinder enters a steam pipeline, and a closed circulating water system is arranged between the steam pipeline and the steam re-steam pipeline; the steam return pipeline is provided with a shaft seal heater and a low-pressure heater, part of heat of cold re-steam exchanges heat with the closed circulating water system, the closed circulating water system exchanges heat with condensed water in the steam return pipeline simultaneously, and the condensed water after heat exchange is conveyed to the low-pressure heater for continuous heating.
The utility model discloses further improvement lies in:
the closed circulating water system comprises a heat recovery heat exchanger and a water-water heat exchanger, the circulating water forms closed circulation between the heat recovery heat exchanger and the water-water heat exchanger, and a circulating pump for providing power for the circulating water system is arranged between the heat recovery heat exchanger and the water-water heat exchanger.
The outlet of the shaft seal heater is connected with the cold side inlet of the water-water heat exchanger, the cold side outlet of the water-water heat exchanger is connected with the low-pressure heater, and condensed water of the shaft seal heater is heated by the water-water heat exchanger and then is conveyed to the low-pressure heater.
And a bypass pipeline is also connected in parallel on the water-water heat exchanger, and a bypass isolating valve is arranged on the bypass pipeline.
The steam pipeline is provided with a flow regulating pore plate, the heat recovery heat exchanger is connected on the flow regulating pore plate in parallel, cold re-steam enters the heat recovery heat exchanger through the first steam pipeline isolation valve to exchange heat, the cold re-steam after heat exchange is converged with the cold re-steam passing through the flow regulating pore plate through the second steam pipeline isolation valve, one part of the cold re-steam after heat exchange is output as industrial steam supply, and the other part of the cold re-steam is output to the boiler reheater.
The inlet of the water-water heat exchanger is provided with a water inlet isolation valve, the outlet of the water-water heat exchanger is provided with a water outlet isolation valve, and the bypass pipeline is connected in parallel at two ends of the water inlet isolation valve, the water-water heat exchanger and the water outlet isolation valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a partial heat transfer of heat recovery heat exchanger with cold redistributing to low pressure feed water, can reduce cold redistributing temperature more than 30 ℃ on the one hand, multiplicable cold industry steam supply volume 200% again, the unit can be because the promotion of outside steam supply ability and the use that reduces high-quality steam and the economic nature is promoted to also can reduce the use that industry supplied steam desuperheating water.
The utility model discloses establish and set up heat recovery heat exchanger, water-water heat exchanger double loop, utilize the cold steam heating low pressure feed water heater import condensate water again of part to reach the energy and jointly shift the utilization, and then reduce the risk of boiler re-heater overtemperature, increase the maximum heating capacity of cold steam again, reduce the volume of devoting of cold steam supply desuperheating water again, promote unit operation economic nature. The utility model discloses can be applied to the external industry and supply the secondary reheat generating set of vapour, the heat part through the heat transfer with cold reheat utilizes the condensate water of low pressure feed water heater import, reduce cold reheat and the external industry and supply the temperature of vapour, reduce the risk of reheater overtemperature when the boiler is cold again external to supply vapour, promote the cold maximum ability that supplies vapour external to industry again, reduce the use of high-quality steam such as reheat steam, reduce the use that the industry supplied vapour desuperheating water, promote unit operation economy, reduce the electricity generation coal consumption.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of the system structure of the present invention.
Wherein, 1-high pressure cylinder of steam turbine; 2-a first steam line isolation valve; 3-a shaft seal heater; 4-water heat exchanger; 5-a second steam line isolation valve; 6-flow regulating orifice plate; 7-a water inlet isolation valve; 8-a water outlet isolation valve; 9-a bypass isolation valve; 10-heat recovery heat exchanger; 11-a circulation pump; 12-Low pressure Heater.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses a condensate water combined cycle system for improving the cold and re-steam supply capacity of a boiler, which comprises a steam turbine high pressure cylinder 1, a steam pipeline and a steam return pipeline; cold re-steam of the high-pressure cylinder 1 of the steam turbine enters a steam pipeline, and a closed circulating water system is arranged between the steam pipeline and the steam re-steam pipeline.
The closed circulating water system comprises a heat recovery heat exchanger 4 and a water-water heat exchanger 10, the circulating water heat recovery heat exchanger 4 and the water-water heat exchanger 10 are in closed circulation, and a circulating pump 11 for providing power for the circulating water system is arranged between the heat recovery heat exchanger 4 and the water-water heat exchanger 10.
An outlet of the shaft seal heater 3 is connected with a cold side inlet of the water-water heat exchanger 10, a cold side outlet of the water-water heat exchanger 10 is connected with a low-pressure heater 12, and condensed water of the shaft seal heater 3 is heated by the water-water heat exchanger 10 and then is conveyed to the low-pressure heater 12; the water-water heat exchanger 10 is also connected in parallel with a bypass pipeline, and a bypass isolating valve 9 is arranged on the bypass pipeline.
Be provided with flow control orifice plate 6 on the steam conduit, heat recovery heat exchanger 4 connects in parallel on flow control orifice plate 6, and cold steams get into heat recovery heat exchanger 4 through first steam conduit isolating valve 2 and carry out the heat transfer, and cold steams after the heat transfer converge with the cold steams through flow control orifice plate 6 through second steam conduit isolating valve 5, and partly cold steams after converging are exported as industry steam supply, and another part is exported to the boiler reheater.
The inlet of the water-water heat exchanger 10 is provided with a water inlet isolation valve 7, the outlet is provided with a water outlet isolation valve 8, and the bypass pipeline is connected in parallel at two ends of the water inlet isolation valve 7, the water-water heat exchanger 10 and the water outlet isolation valve 8.
The principle of the utility model is as follows:
the utility model discloses a heat recovery heat exchanger 4 shifts the heat part of cold reheat to low pressure feed water, can reduce cold reheat temperature more than 30 ℃, reduces the risk of boiler reheater overtemperature, and then increases about cold industry steam supply volume 200%, can reduce the unit cold and supply the operation of vapour desuperheating water again. The increase of the industrial steam supply can greatly improve the economic index of the unit.
The utility model discloses a working process:
in the utility model, after one part of cold re-steam of the high-pressure cylinder of the steam turbine passes through the steam pipeline isolation valve 2, the heat recovery heat exchanger 4 and the steam pipeline isolation valve 5, the cold re-steam which passes through the flow regulating orifice 6 and is not subjected to heat exchange is merged with the other part of cold re-steam; the closed circulating water passes through the heat recovery heat exchanger 4, the circulating pump 11 and the water-water heat exchanger 10 to complete the heat exchange process; outlet condensed water of the shaft seal heater 3 passes through the water inlet isolation valve 7, the water-water heat exchanger 10 and the water outlet isolation valve 8 and is heated by closed circulating water, and the heated condensed water enters the low-pressure heater.
When the steam pipeline isolation valve 2, the steam pipeline isolation valve 5, the water inlet isolation valve 7 and the water outlet isolation valve 8 are in an open state, the bypass isolation valve 9 is in a closed state, and the circulating pump 11 is in a running state; when the unit does not use cold and supplies steam to the outside, the steam pipeline isolation valve 2 and the steam pipeline isolation valve 5 are closed in sequence, then the bypass isolation valve 9 is opened gradually, the heat recovery heat exchanger 4 is in a shutdown state, and the circulating pump 11 is shut down.
The utility model discloses the principle is clear, the system is simple, and the maintenance volume is little, can be on-line put into operation and shut down, is adapted to all secondary reheat generating set, is the innovation technique that promotes reheat generating set cold industry steam supply volume again, reduces boiler reheater overtemperature risk, lifting machine group heating economy nature.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021870242.3U CN212406837U (en) | 2020-08-31 | 2020-08-31 | Condensate water combined circulation system for improving cold and steam supply capacity of boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021870242.3U CN212406837U (en) | 2020-08-31 | 2020-08-31 | Condensate water combined circulation system for improving cold and steam supply capacity of boiler |
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| CN212406837U true CN212406837U (en) | 2021-01-26 |
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| CN202021870242.3U Active CN212406837U (en) | 2020-08-31 | 2020-08-31 | Condensate water combined circulation system for improving cold and steam supply capacity of boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927587A (en) * | 2020-08-31 | 2020-11-13 | 西安热工研究院有限公司 | A condensed water combined cycle system and method for improving boiler cold resupply capability |
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2020
- 2020-08-31 CN CN202021870242.3U patent/CN212406837U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927587A (en) * | 2020-08-31 | 2020-11-13 | 西安热工研究院有限公司 | A condensed water combined cycle system and method for improving boiler cold resupply capability |
| CN111927587B (en) * | 2020-08-31 | 2024-12-24 | 西安热工研究院有限公司 | A condensate combined circulation system and method for improving boiler cold re-steam supply capacity |
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