CN102798116A - Horizontal-type three-section thermal power high-pressure feed-water heater and heating method - Google Patents
Horizontal-type three-section thermal power high-pressure feed-water heater and heating method Download PDFInfo
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- CN102798116A CN102798116A CN2012103049754A CN201210304975A CN102798116A CN 102798116 A CN102798116 A CN 102798116A CN 2012103049754 A CN2012103049754 A CN 2012103049754A CN 201210304975 A CN201210304975 A CN 201210304975A CN 102798116 A CN102798116 A CN 102798116A
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Abstract
The invention discloses a horizontal-type three-section thermal power high-pressure feed-water heater and a heating method. In recent years, with the rapid development of the national economy, the parameters of power units are continuously updated from 300 MW to 600 MW to 1000 MW, and the regeneration of technology is always performed. From composition, the product comprises a shell (3), wherein a tube plate (2) is installed at one side in the shell; a hemispherical sealing head (15) with a water chamber (1) is connected to one side of the tube plate; an overheat steam cooling section (4) and a drainage cooling section (6) are installed side by side in the shell which is located at one side of the tube plate; a condensing section (5) is installed behind the overheat steam cooling section and the drainage cooling section in the shell; and a U-shaped heat exchange tube (7) is installed in the shell and connected with the tube plate by penetrating through the overheat steam cooling section, the drainage cooling section and the condensing section. The heating method disclosed by the invention is used for the horizontal-type three-section thermal power high-pressure feed-water heater.
Description
Technical field:
the present invention relates to a kind of horizontal three sections high-pressure feed-water heaters of thermoelectricity that are used for thermal power plant 1000MW unit.
Background technology:
in recent years, along with the high speed development of national economy, the parameter of electric power unit is also in continuous upgrading, to the 1000MW unit, carrying out the update of technology from 300MW unit, 600MW unit always.High-pressure heater is that the operating pressure in the heat regenerative system of power station is the highest; The equipment that the shell journey work temperature difference is maximum; And be one of most important equipment in the heat regenerative system of thermal power plant; The safety and economic operation of high-pressure heater also plays important effect to the operational reliability and the economy of power plant.
conventional 1000MW unit height adds because steam flow is big; The cause that feedwater flow is big; And it is excessive that height adds the tube sheet diameter, is unfavorable for making, and generally all adopts biserial to arrange; Every like this Lie Gaojia adds with regard to the height that is equivalent to the 500MW unit parameter, helps carrying out design, the manufacturing of high-pressure heater.Biserial is arranged also has certain shortcoming, and being exactly needs two cover control elements, and the occupation of land space is also bigger, simultaneously, the control of total system is had relatively high expectations.
The pure counter-flow arrangement of the general employing of the superheat section that
conventional thermoelectricity height adds; Be in order to obtain the bigger temperature difference, to reduce heat transfer area like this, thereby improved the unit mass heat exchange efficiency; But in 1000MW single series unit; If adopt pure counter-flow arrangement structure, can make the steam flow rate in the superheat section involucrum too high, and then cause the heat exchanger tube generation vibration and the pressure loss to surpass the permissible value of 0.035MPa.
Summary of the invention:
the purpose of this invention is to provide a kind of mode that adopts adverse current to add following current simultaneously and conduct steam flow, reduce the horizontal three sections high-pressure feed-water heaters of thermoelectricity and the heating means of the pressure loss.
Above-mentioned purpose realizes through following technical scheme:
The horizontal three sections high-pressure feed-water heaters of
a kind of thermoelectricity; Its composition comprises: housing; A side is equipped with tube sheet in the described housing; Described tube sheet one side connects the dome-type end socket that has hydroecium; Be installed with superheated steam cooling section and hydrophobic cooling section side by side at the described housing that is positioned at described tube sheet one side, the section of condensing is contained in the rear of described superheated steam cooling section and described hydrophobic cooling section in the described housing, and the U-shaped heat exchanger tube is contained in the described housing and passes described superheated steam cooling section, described hydrophobic cooling section, the described tube sheet of the described section of condensing connection.
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity; Has described hydroecium in the described dome-type end socket; Described dome-type end socket one side has the feedwater discharge connection; Described dome-type end socket opposite side has feed-water inlet nozzle, and described dome-type end socket top has pressure self-energized seal manhole.
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity; Described housing one side is installed with the water delivery discharge connection; Described water delivery discharge connection connects hydrophobic cooling section; Described housing opposite side is installed with steam inlet and takes over, and described steam inlet is taken over and connected described superheated steam cooling section.
The horizontal three sections high-pressure feed-water heaters of described thermoelectricity, described superheated steam cooling section has the superheated steam cooling sectionHorizontal
Dividing plate and superheated steam cooling section involucrum, described hydrophobic cooling section have hydrophobic cooling section dividing plate and hydrophobic cooling section involucrum, the described Duan Jun of condensing have the section of condensingHorizontal
Dividing plate and the section of condensing involucrum; Described U-shaped heat exchanger tube passes described superheated steam cooling section dividing plate, described hydrophobic cooling section dividing plate, the described section of condensing dividing plate, and described superheated steam cooling section is made up of described steam cooled section involucrum, described steam cooled section diaphragm plate, described U-shaped heat exchange tube, special-purpose steam channel; The described section of condensing is made up of the described section of condensing diaphragm plate and described U-shaped heat exchanger tube; Described hydrophobic cooling section is made up of described hydrophobic section dividing plate, described hydrophobic section involucrum and described U-shaped heat exchanger tube, and described U-shaped heat exchanger tube passes described hydrophobic section dividing plate side by side.
Superheated steam cooling section and back superheated steam cooling section before the horizontal three sections high-pressure feed-water heaters of
described thermoelectricity, described superheated steam cooling section comprise; MEDIA FLOW is that following current is arranged to consistent in steam flow before described in the superheated steam cooling section and the described U-shaped heat exchanger tube, and steam flow in the superheated steam cooling section of described back and the interior MEDIA FLOW of described U-shaped heat exchanger tube are counter-flow arrangement on the contrary.
The heat-exchange method of
horizontal three sections high-pressure feed-water heaters of a kind of thermoelectricity, steam are taken over from steam inlet and are got into the superheated steam cooling section, after getting into the superheated steam cooling section, are divided into two-way, and one the tunnel is the following current heat exchange, and another road is a countercurrent flow.
Beneficial effect:
1. the present invention have reduced the control requirement of power plant; Saved the floor space of a Lie Gaojia simultaneously; Investment reduces greatly; The generation pressure loss of heat exchanger tube vibration surpassed permissible value when the layout of the steam cooled section of suitable contrary formula can avoid steam flow excessive, had improved the operational safety performance that 1,000,000 single series height add.
2. the invention solves the problem that 1,000,000 biserial height add the control aspect, have improved the control ability of total system.
are the steam flow along contrary formula of the present invention's employing 3., and promptly one road steam is the following current heat exchange, and another road is a countercurrent flow, has guaranteed the safety of heat exchanger tube in the superheat section involucrum.
water side seal head diameter 4. of the present invention increases 26% than the water side seal head diameter that the bi serie height adds; Increased the space in the water side seal head; To the impact that causes of tube sheet, improve the high running environment that adds tube sheet when reducing feedwater entering high-pressure heater water side more effectively.Simultaneously, bigger hydroecium space helps the operation maintenance to high-pressure heater water side.
The equal unit bi serie height of
overall weight 5. of the present invention adds reduction by 13%, has greatly improved every cover unit stock utilization, has practiced thrift a large amount of high-quality low-alloy steel products simultaneously, meets the policy of national cost efficiency.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is that accompanying drawing 1 steam moves towards figure.
The specific embodiment:
Embodiment 1:
The horizontal three sections high-pressure feed-water heaters of
a kind of thermoelectricity; Its composition comprises: housing 3; A side is equipped with tube sheet 2 in the described housing; Described tube sheet one side connects the dome-type end socket 15 that has hydroecium 1; Be installed with superheated steam cooling section 4 and hydrophobic cooling section 6 side by side at the described housing that is positioned at described tube sheet one side, the section of condensing 5 is contained in the rear of described superheated steam cooling section and described hydrophobic cooling section in the described housing, and U-shaped heat exchanger tube 7 is contained in the described housing and passes described superheated steam cooling section, described hydrophobic cooling section, the described tube sheet of the described section of condensing connection.
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity; Has described hydroecium in the described dome-type end socket; Described dome-type end socket one side has feedwater discharge connection 11; Described dome-type end socket opposite side has feed-water inlet nozzle 12, and described dome-type end socket top has pressure self-energized seal manhole 10.
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity; Described housing one side is installed with water delivery discharge connection 9; Described water delivery discharge connection connects hydrophobic cooling section; Described housing opposite side is installed with steam inlet and takes over 8, and described steam inlet is taken over and connected described superheated steam cooling section.
The horizontal three sections high-pressure feed-water heaters of described thermoelectricity, described superheated steam cooling section has the superheated steam cooling sectionHorizontal
Dividing plate 13 has hydrophobic cooling section dividing plate 16 with superheated steam cooling section involucrum 14, described hydrophobic cooling section and hydrophobic cooling section involucrum 17, the described Duan Jun of condensing have the section of condensingHorizontal
Dividing plate 18 and the section of condensing involucrum 19; Described U-shaped heat exchanger tube passes described superheated steam cooling section dividing plate, described hydrophobic cooling section dividing plate, the described section of condensing dividing plate, and described superheated steam cooling section is made up of described steam cooled section involucrum, described steam cooled section diaphragm plate, described U-shaped heat exchange tube, special-purpose steam channel; The described section of condensing is made up of the described section of condensing diaphragm plate and described U-shaped heat exchanger tube; Described hydrophobic cooling section is made up of described hydrophobic section dividing plate, described hydrophobic section involucrum and described U-shaped heat exchanger tube, and described U-shaped heat exchanger tube passes described hydrophobic section dividing plate side by side.
Superheated steam cooling section and back superheated steam cooling section before the horizontal three sections high-pressure feed-water heaters of
described thermoelectricity, described superheated steam cooling section comprise; MEDIA FLOW is that following current is arranged to consistent in steam flow before described in the superheated steam cooling section and the described U-shaped heat exchanger tube, and steam flow in the superheated steam cooling section of described back and the interior MEDIA FLOW of described U-shaped heat exchanger tube are counter-flow arrangement on the contrary.
Embodiment 2:
The heat-exchange method of
horizontal three sections high-pressure feed-water heaters of a kind of thermoelectricity, steam are taken over from steam inlet and are got into the superheated steam cooling section, after getting into the superheated steam cooling section, are divided into two-way, and one the tunnel is the following current heat exchange, and another road is a countercurrent flow.
Embodiment 3:
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity of the foregoing description are made up of parts such as hydroecium, tube sheet, housing, U-shaped heat exchanger tubes; The heat exchange zone is divided into superheated steam cooling section, the section of condensing, hydrophobic cooling section; Hydroecium is in tube sheet one side; Be connected with tube sheet through welding; At tube sheet opposite side be arranged side by side superheat section and hydrophobic cooling section of two parts up and down; The section of condensing is at superheat section and hydrophobic cooling section rear, and the U-shaped heat exchanger tube passes the dividing plate of each section, and links together through the mode that welding adds expanded joint with tube sheet; The steam admission mode of superheated steam cooling section is along contrary hybrid.
Embodiment 4:
The horizontal three sections high-pressure feed-water heaters of the described thermoelectricity of the foregoing description are made up of hydroecium, tube sheet, housing, superheated steam cooling section, the section of condensing, hydrophobic cooling section, U-shaped heat exchanger tube etc.; Hydroecium is connected with tube sheet through welding manner with housing; U-shaped tube and tube plate adds expanded joint through welding and links to each other; Two ones are arranged side by side superheated steam cooling section and hydrophobic cooling section about tube sheet one side, at superheated steam cooling section and hydrophobic cooling section rear the section of condensing are set, and the U-shaped heat exchanger tube is a main element of forming steam cooled section, the section of condensing, hydrophobic cooling section; Steam inlet is set above the superheated steam cooling section takes over, hydrophobic discharge connection is set below hydrophobic cooling section;
Described hydroecium is the dome-type end socket, and pressure self-energized seal manhole is arranged at the end socket top, on the top of dome-type end socket the feedwater discharge connection is set, and in dome-type end socket bottom the feedwater discharge connection is set;
Embodiment 5:
The horizontal three sections high-pressure feed-water heaters of
described thermoelectricity of the foregoing description are made up of parts such as hydroecium, tube sheet, housing, U-shaped heat exchanger tubes; The heat exchange zone that height adds is divided into superheated steam cooling section, the section of condensing, hydrophobic cooling section; Hydroecium is in tube sheet one side; Be connected with tube sheet through welding; At tube sheet opposite side upper and lower two be arranged side by side superheat section and hydrophobic cooling sections; The section of condensing is at superheat section and hydrophobic cooling section rear, and the U-shaped heat exchanger tube passes the dividing plate of each section, and links together through the mode that welding adds expanded joint with tube sheet.
Claims (7)
1. horizontal three sections high-pressure feed-water heaters of thermoelectricity; Its composition comprises: housing; It is characterized in that: a side is equipped with tube sheet in the described housing; Described tube sheet one side connects the dome-type end socket that has hydroecium; Be installed with superheated steam cooling section and hydrophobic cooling section side by side at the described housing that is positioned at described tube sheet one side, the section of condensing is contained in the rear of described superheated steam cooling section and described hydrophobic cooling section in the described housing, and the U-shaped heat exchanger tube is contained in the described housing and passes described superheated steam cooling section, described hydrophobic cooling section, the described tube sheet of the described section of condensing connection.
2. the horizontal three sections high-pressure feed-water heaters of thermoelectricity according to claim 1; It is characterized in that: have described hydroecium in the described dome-type end socket; Described dome-type end socket one side has the feedwater discharge connection; Described dome-type end socket opposite side has feed-water inlet nozzle, and described dome-type end socket top has pressure self-energized seal manhole.
3. the horizontal three sections high-pressure feed-water heaters of thermoelectricity according to claim 1; It is characterized in that: described housing one side is installed with the water delivery discharge connection; Described water delivery discharge connection connects hydrophobic cooling section; Described housing opposite side is installed with steam inlet and takes over, and described steam inlet is taken over and connected described superheated steam cooling section.
4. according to claim 1 or the horizontal three sections high-pressure feed-water heaters of 2 or 3 described thermoelectricitys; It is characterized in that: described superheated steam cooling section has superheated steam cooling section diaphragm plate and superheated steam cooling section involucrum, described hydrophobic cooling section have hydrophobic cooling section dividing plate and hydrophobic cooling section involucrum, the described Duan Jun of condensing have the section of condensing diaphragm plate and the section of condensing involucrum; Described U-shaped heat exchanger tube passes described superheated steam cooling section dividing plate, described hydrophobic cooling section dividing plate, the described section of condensing dividing plate, and described superheated steam cooling section is made up of described steam cooled section involucrum, described steam cooled section diaphragm plate, described U-shaped heat exchange tube, special-purpose steam channel; The described section of condensing is made up of the described section of condensing diaphragm plate and described U-shaped heat exchanger tube; Described hydrophobic cooling section is made up of described hydrophobic section dividing plate, described hydrophobic section involucrum and described U-shaped heat exchanger tube, and described U-shaped heat exchanger tube passes described hydrophobic section dividing plate side by side.
5. according to claim 1 or the horizontal three sections high-pressure feed-water heaters of 2 or 3 described thermoelectricitys, it is characterized in that: superheated steam cooling section and back superheated steam cooling section before described superheated steam cooling section comprises; MEDIA FLOW is that following current is arranged to consistent in steam flow before described in the superheated steam cooling section and the described U-shaped heat exchanger tube, and steam flow in the superheated steam cooling section of described back and the interior MEDIA FLOW of described U-shaped heat exchanger tube are counter-flow arrangement on the contrary.
6. the horizontal three sections high-pressure feed-water heaters of thermoelectricity according to claim 4 is characterized in that: superheated steam cooling section and back superheated steam cooling section before described superheated steam cooling section comprises; MEDIA FLOW is that following current is arranged to consistent in steam flow before described in the superheated steam cooling section and the described U-shaped heat exchanger tube, and steam flow in the superheated steam cooling section of described back and the interior MEDIA FLOW of described U-shaped heat exchanger tube are counter-flow arrangement on the contrary.
7. the heat-exchange method of the horizontal three sections high-pressure feed-water heaters of thermoelectricity is characterized in that: steam is taken over from steam inlet and is got into the superheated steam cooling section, after getting into the superheated steam cooling section, is divided into two-way, and one the tunnel is the following current heat exchange, and another road is a countercurrent flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210304975.4A CN102798116B (en) | 2012-08-26 | 2012-08-26 | Horizontal-type three-section thermal power high-pressure feed-water heater and heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210304975.4A CN102798116B (en) | 2012-08-26 | 2012-08-26 | Horizontal-type three-section thermal power high-pressure feed-water heater and heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102798116A true CN102798116A (en) | 2012-11-28 |
| CN102798116B CN102798116B (en) | 2016-12-21 |
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| CN201210304975.4A Active CN102798116B (en) | 2012-08-26 | 2012-08-26 | Horizontal-type three-section thermal power high-pressure feed-water heater and heating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471082A (en) * | 2013-09-04 | 2013-12-25 | 哈尔滨锅炉厂有限责任公司 | Three-section horizontal type feed water heater for 200MW units |
| CN104457338A (en) * | 2014-11-27 | 2015-03-25 | 哈尔滨锅炉厂有限责任公司 | Heat exchanging method for horizontal type heat exchanger for steam cooling with high degree of superheat |
| CN108343943A (en) * | 2017-01-22 | 2018-07-31 | 东方电气集团东方锅炉股份有限公司 | A kind of overheat segment structure improving high pressure heater available rate |
| CN110043885A (en) * | 2019-04-10 | 2019-07-23 | 哈尔滨锅炉厂有限责任公司 | A kind of novel fired power generating unit steam condenser U heat exchange tail portion containment structure |
| CN113266816A (en) * | 2021-04-22 | 2021-08-17 | 哈尔滨锅炉厂有限责任公司 | Combined high-pressure heater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471082A (en) * | 2013-09-04 | 2013-12-25 | 哈尔滨锅炉厂有限责任公司 | Three-section horizontal type feed water heater for 200MW units |
| CN104457338A (en) * | 2014-11-27 | 2015-03-25 | 哈尔滨锅炉厂有限责任公司 | Heat exchanging method for horizontal type heat exchanger for steam cooling with high degree of superheat |
| CN108343943A (en) * | 2017-01-22 | 2018-07-31 | 东方电气集团东方锅炉股份有限公司 | A kind of overheat segment structure improving high pressure heater available rate |
| CN108343943B (en) * | 2017-01-22 | 2023-11-07 | 东方电气集团东方锅炉股份有限公司 | Overheating section structure for improving input rate of high-pressure heater |
| CN110043885A (en) * | 2019-04-10 | 2019-07-23 | 哈尔滨锅炉厂有限责任公司 | A kind of novel fired power generating unit steam condenser U heat exchange tail portion containment structure |
| CN113266816A (en) * | 2021-04-22 | 2021-08-17 | 哈尔滨锅炉厂有限责任公司 | Combined high-pressure heater |
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| CN102798116B (en) | 2016-12-21 |
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