CN208203373U - A kind of preposition heat-exchange system of oxygen-eliminating device - Google Patents
A kind of preposition heat-exchange system of oxygen-eliminating device Download PDFInfo
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- CN208203373U CN208203373U CN201820687328.9U CN201820687328U CN208203373U CN 208203373 U CN208203373 U CN 208203373U CN 201820687328 U CN201820687328 U CN 201820687328U CN 208203373 U CN208203373 U CN 208203373U
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Abstract
The utility model discloses a kind of preposition heat-exchange systems of oxygen-eliminating device, belong to thermal power plant high temperature and pressure back pressure steam turbines oxygen-eliminating device deoxygenation technology field, including moisturizing collecting box and turbine discharge pipe, the moisturizing collecting box is communicated with surface-type heat exchanger by water supply pipe, surface-type heat exchanger is communicated with direct contact heat exchanger by medium temperature water-supply-pipe, and direct contact heat exchanger is communicated with oxygen-eliminating device by high temperature water-supply-pipe；The turbine discharge pipe is connected to surface-type heat exchanger, and surface-type heat exchanger is connected to by steam transmitting pipe with direct contact heat exchanger.The utility model can solve in high temperature and pressure back pressure steam turbines, and deoxygenation, heating problems when all low temperature demineralized water of oxygen-eliminating device moisturizing meet the inflow temperature requirement of high-temperature high-pressure boiler, guarantee deaerating effect, avoid influencing pipeline life and boiler output.
Description
Technical field
The utility model relates to thermal power plant high temperature and pressure back pressure steam turbines oxygen-eliminating device deoxygenation technology fields, especially
It is related to a kind of preposition heat-exchange system of oxygen-eliminating device.
Background technique
The main function of thermal power plant's oxygen-eliminating device is to guarantee water supply for removing oxygen and other gases in boiler feedwater
Quality.Meanwhile oxygen-eliminating device itself is a heater in water supply back heating system again, plays heating water supply, improves to water temperature
The effect of degree.
The newly-built unit of thermal power plant is substantially high temperature and pressure cogeneration units at present, and specially back pressure type steam turbine generates electricity
Unit, but since technique limits, many thermal power plants add hyperbaric heating there is no the outer recycling for steam condensate is equipped with
Device leakage problem takes place frequently, and maintenance duration is long, and more and more thermal power plants no longer add high-pressure heater, causes oxygen-eliminating device without height
The hydrophobic moisturizing of temperature, leads to all low temperature demineralized waters of the moisturizing of oxygen-eliminating device, after low temperature demineralized water enters oxygen-eliminating device, by oxygen-eliminating device
Heating, deoxygenation, but the using effect of low temperature demineralized water is not fully up to expectations, because of the demineralized water after oxygen-eliminating device heating merely
Really be unable to satisfy the inflow temperature requirement of high-temperature high-pressure boiler, and deaerating effect is also bad, very influence pipeline life and
Boiler output.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of preposition heat-exchange systems of oxygen-eliminating device；The oxygen-eliminating device
Preposition heat-exchange system can solve in high temperature and pressure back pressure steam turbines, when all low temperature demineralized waters of oxygen-eliminating device moisturizing,
It is well positioned to meet the inflow temperature requirement of high-temperature high-pressure boiler, guarantees deaerating effect, avoids influencing pipeline life and boiler goes out
Power.
In order to solve the above-mentioned technical problem, the preposition heat-exchange system of a kind of oxygen-eliminating device provided by the utility model, including moisturizing
Collecting box and turbine discharge pipe, the moisturizing collecting box are communicated with surface-type heat exchanger, surface-type heat exchanger by water supply pipe
It is communicated with direct contact heat exchanger by medium temperature water-supply-pipe, direct contact heat exchanger is communicated with oxygen-eliminating device by high temperature water-supply-pipe；It is described
Turbine discharge pipe is connected to surface-type heat exchanger, and surface-type heat exchanger is connected to by steam transmitting pipe with direct contact heat exchanger.
It is further to improve, it is low temperature demineralized water in above-mentioned moisturizing collecting box, water temperature is 23 DEG C ~ 27 DEG C；The medium temperature is defeated
It is medium temperature demineralized water in water pipe, water temperature is 48 DEG C ~ 52 DEG C；It is high temperature demineralized water in the high temperature water-supply-pipe, water temperature is 88 DEG C ~ 92
DEG C, moisturizing is collected by moisturizing collecting box, is more convenient to carry out heating treatment to moisturizing；By with the higher vapour of the degree of superheat
The heat exchange for the first time of turbine discharge, low temperature demineralized water are about warming up to above-mentioned 48 DEG C ~ 52 DEG C temperature ranges；By being arranged with steam turbine
The secondary heat exchange of vapour saturated vapor, medium temperature demineralized water are about warming up to above-mentioned 88 DEG C ~ 92 DEG C temperature ranges.
It is further to improve, it is high degree of superheat steam in above-mentioned turbine discharge pipe；It is saturated vapor in the steam transmitting pipe.
Further to improve, above-mentioned turbine discharge pipe is connected to by steam supply pipe with direct contact heat exchanger, the steam supply pipe
On be provided with manual valve, in actual operation because heat midway scatter and disappear etc. reasons, cause finally in direct contact heat exchanger
The temperature of high temperature demineralized water be perhaps not achieved about 90 DEG C, but by above-mentioned design, this patent can enable turbine discharge pipe
In high degree of superheat steam and direct contact heat exchanger in high temperature demineralized water carry out mixed heat transfer, guarantee high temperature demineralized water entering
Reach 88 DEG C ~ 92 DEG C of preset temperature before oxygen-eliminating device, guarantees going on smoothly for task.
Further to improve, above-mentioned high temperature water-supply-pipe water inlet position is provided with temperature sensor, temperature sensor connection
There is PLC controller, PLC controller is connected with display screen, and display screen is used to show the water temperature of detection, by above-mentioned design, so that it may
It preferably constantly grasps whether temperature of the high temperature demineralized water before entering oxygen-eliminating device reaches requirement, and then judges whether to open hand
Valve is controlled, enables the high degree of superheat steam in turbine discharge pipe carry out mixing to the high temperature demineralized water in direct contact heat exchanger and adds
Heat guarantees that high temperature demineralized water reaches 88 DEG C ~ 92 DEG C of preset temperature before entering oxygen-eliminating device.
It is further to improve, temperature detecting module is provided in above-mentioned PLC controller；The temperature detecting module be responsible for by
The temperature information of temperature sensor feedback is shown on a display screen.
It is further to improve, it is provided with bracket on above-mentioned high temperature water-supply-pipe, control cabinet is provided on bracket, is set in control cabinet
It is equipped with the PLC controller, control box outer wall is provided with the display screen.
It is further to improve, the model S7-200 or S7-300 of above-mentioned PLC controller, it should be noted that above-mentioned
Model is the citing of this patent, and the PLC controller of above-mentioned model can only be used by not representing this patent.
Compared with prior art, the utility model has the following beneficial effects:
The utility model can solve in high temperature and pressure back pressure steam turbines, when all low temperature demineralized waters of oxygen-eliminating device moisturizing
When, it is also well positioned to meet the inflow temperature requirement of high-temperature high-pressure boiler, guarantees deaerating effect, avoids influencing pipeline life and pot
Furnace power output.
The demineralized water that it is about 23 DEG C ~ 27 DEG C of room temperature that the design concept of the utility model, which is by water temperature, preheats, by it
90 DEG C are heated to about, then it is allowed to carry out subsequent deoxygenation, heating operation subsequently into oxygen-eliminating device.
Since heating steam superheat is too high, the requirement of heat exchange is unable to satisfy using direct contact mixed heat transfer, so this
Patent innovation devises two-stage heat exchange structure, is exchanged heat, is made twice using surface-type heat exchanger and direct contact heat exchanger
Low temperature demineralized water enters back into oxygen-eliminating device and completes subsequent deoxygenation, heating operation after gradually heating up, promote high-temperature high-pressure boiler
Inflow temperature is met the requirements, and guarantees deaerating effect, avoids influencing pipeline life and boiler output.
Detailed description of the invention
Fig. 1 is the utility model structure diagram.
It is as shown in the figure: 1- moisturizing collecting box；2- water supply pipe；3- surface-type heat exchanger；4- medium temperature water-supply-pipe；5- is hybrid to be changed
Hot device；6- high temperature water-supply-pipe；7- oxygen-eliminating device；8- turbine discharge pipe；9- steam transmitting pipe；10- steam supply pipe；11- manual valve；12-
Temperature sensor；13- display screen；14- bracket；15- control cabinet.
Specific embodiment
In order to make those skilled in the art better understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in new embodiment, the technical solutions in the embodiments of the present invention are clearly and completely described.
As shown in Figure 1, a kind of preposition heat-exchange system of oxygen-eliminating device, including moisturizing collecting box 1 and turbine discharge pipe 2, it is described
Moisturizing collecting box 1 is communicated with surface-type heat exchanger 3 by water supply pipe 2, and surface-type heat exchanger 3 is communicated with by medium temperature water-supply-pipe 4
Direct contact heat exchanger 5, direct contact heat exchanger 5 are communicated with oxygen-eliminating device 7 by high temperature water-supply-pipe 6；The turbine discharge pipe 8 and table
Face formula heat exchanger 3 is connected to, and surface-type heat exchanger 3 is connected to by steam transmitting pipe 9 with direct contact heat exchanger 5.
It is low temperature demineralized water in the moisturizing collecting box 1, water temperature is 23 DEG C ~ 27 DEG C；It is medium temperature in the medium temperature water-supply-pipe 4
Demineralized water, water temperature are 48 DEG C ~ 52 DEG C；It is high temperature demineralized water in the high temperature water-supply-pipe 6, water temperature is 88 DEG C ~ 92 DEG C, the steamer
It is high degree of superheat steam in machine gland steam exhauster 8；It is saturated vapor in the steam transmitting pipe 9.
The turbine discharge pipe 8 is connected to by steam supply pipe 10 with direct contact heat exchanger 5, is provided on the steam supply pipe 10
Manual valve 11,6 water inlet position of high temperature water-supply-pipe are provided with temperature sensor 12, and temperature sensor 12 is connected with PLC
Controller, PLC controller are connected with display screen 13, and display screen 13 is used to show the water temperature of detection, is arranged in the PLC controller
There is temperature detecting module；The temperature detecting module is responsible for showing the temperature information that temperature sensor 12 is fed back in display screen 13
On, it is provided with bracket 14 on the high temperature water-supply-pipe 6, control cabinet 15 is provided on bracket 14, is provided in control cabinet 15 described
PLC controller, 15 outer wall of control cabinet are provided with the display screen 13, the model S7-200 or S7- of the PLC controller
300。
This patent is to aim to solve high temperature and pressure back pressure steam turbines, and when oxygen-eliminating device moisturizing all low temperature demineralized water removes
The problem of deoxygenation of oxygen device, heating, as shown in Figure 1, about 25 DEG C of room temperature of low temperature demineralized water is exchanged heat by tube side into surface-type
Device, while the higher turbine discharge of the degree of superheat carries out preliminary add to low temperature demineralized water by the shell side of surface-type heat exchanger
Heat, low temperature demineralized water water temperature rises to about 50 DEG C, and by mutual heat exchange, the steam superheat of overheat, which is reduced to, to be essentially saturated
Steam；Then about 50 DEG C of medium temperature demineralized water enters direct contact heat exchanger, while saturated vapor also enters direct contact heat exchanger,
The two carries out mixed heat transfer again, and the water temperature of demineralized water can about rise to 90 DEG C；Final demineralisation water enter oxygen-eliminating device carry out deoxygenation,
The follow-up process such as heating.
Since heating steam superheat is too high, the requirement of heat exchange is unable to satisfy using direct contact mixed heat transfer, so this
Patent innovation devises two-stage heat exchange structure, utilizes surface-type heat exchanger (contactless heat exchange) and direct contact heat exchanger
(contact heat exchange) is exchanged heat twice, oxygen-eliminating device is entered back into after so that low temperature demineralized water is gradually heated up and complete subsequent deoxygenation,
Heating operation promotes the inflow temperature of high-temperature high-pressure boiler to meet the requirements, and guarantees deaerating effect, avoids influencing pipeline life and pot
Furnace power output.
The main function of thermal power plant's oxygen-eliminating device is to guarantee water supply for removing oxygen and other gases in boiler feedwater
Quality, meanwhile, oxygen-eliminating device itself is a heater in water supply back heating system again, plays heating water supply, improves to water temperature
The effect of degree；Under pressure, the temperature of water is higher, and the solubility of gas is with regard to smaller；Conversely, the solubility of gas is got over
Greatly.
Because of the limitation of technique and cost, there is the deoxygenation of many high temperature and pressure back pressure steam turbines thermal power plant at present
The moisturizing of device can only be low temperature demineralized water, very the stability and service life of influence unit operation；So the design of this patent
The demineralized water that it is about 25 DEG C of room temperature that design, which is by water temperature, preheats, and is heated to about 90 DEG C, then allows it subsequently into removing
Oxygen device carries out subsequent deoxygenation, heating operation, meets the inflow temperature requirement of high-temperature high-pressure boiler, guarantees deaerating effect, avoids
Influence pipeline life and boiler output；This patent meets all water at low temperature of unit moisturizing, and the heating and deoxygenation of oxygen-eliminating device are wanted
It asks, ensure that this smoothly drops in unit, and the stability run, guarantee pipeline service life and boiler operatiopn stability, guarantee fire
The safe operation of power plant.
The technical solution of the utility model embodiment is described in detail above, this part uses specific embodiment pair
The principles of the present invention and embodiment are expounded, and the above embodiments are only used to help understand, and this is practical new
The core concept of type, in the case where not departing from the utility model principle, those skilled in the art are not making creative labor
The range of the utility model protection all should belong in every other embodiment obtained under the premise of dynamic.
Claims (8)
1. a kind of preposition heat-exchange system of oxygen-eliminating device, it is characterised in that: including moisturizing collecting box and turbine discharge pipe, the moisturizing
Collecting box is communicated with surface-type heat exchanger by water supply pipe, and surface-type heat exchanger is communicated with mixing heat-exchange by medium temperature water-supply-pipe
Device, direct contact heat exchanger are communicated with oxygen-eliminating device by high temperature water-supply-pipe；The turbine discharge pipe is connected to surface-type heat exchanger,
Surface-type heat exchanger is connected to by steam transmitting pipe with direct contact heat exchanger.
2. the preposition heat-exchange system of oxygen-eliminating device according to claim 1, it is characterised in that: be low temperature in the moisturizing collecting box
Demineralized water, water temperature are 23 DEG C ~ 27 DEG C；It is medium temperature demineralized water in the medium temperature water-supply-pipe, water temperature is 48 DEG C ~ 52 DEG C；The high temperature
It is high temperature demineralized water in water-supply-pipe, water temperature is 88 DEG C ~ 92 DEG C.
3. the preposition heat-exchange system of oxygen-eliminating device according to claim 1, it is characterised in that: be height in the turbine discharge pipe
Degree of superheat steam；It is saturated vapor in the steam transmitting pipe.
4. the preposition heat-exchange system of oxygen-eliminating device according to claim 1, it is characterised in that: the turbine discharge pipe passes through benefit
Steam pipe is connected to direct contact heat exchanger, is provided with manual valve on the steam supply pipe.
5. the preposition heat-exchange system of oxygen-eliminating device according to claim 4, it is characterised in that: the high temperature water-supply-pipe water inlet position
It installs and is equipped with temperature sensor, temperature sensor is connected with PLC controller, and PLC controller is connected with display screen, and display screen is used for
Show the water temperature of detection.
6. the preposition heat-exchange system of oxygen-eliminating device according to claim 5, it is characterised in that: be provided in the PLC controller
Temperature detecting module；The temperature detecting module is responsible for showing the temperature information that temperature sensor is fed back on a display screen.
7. the preposition heat-exchange system of oxygen-eliminating device according to claim 6, it is characterised in that: be provided on the high temperature water-supply-pipe
Bracket is provided with control cabinet on bracket, and the PLC controller is provided in control cabinet, and control box outer wall is provided with the display
Screen.
8. according to the preposition heat-exchange system of oxygen-eliminating device described in claim 5 or 6 or 7, it is characterised in that: the PLC controller
Model S7-200 or S7-300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687328.9U CN208203373U (en) | 2018-05-09 | 2018-05-09 | A kind of preposition heat-exchange system of oxygen-eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687328.9U CN208203373U (en) | 2018-05-09 | 2018-05-09 | A kind of preposition heat-exchange system of oxygen-eliminating device |
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| CN208203373U true CN208203373U (en) | 2018-12-07 |
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| CN201820687328.9U Active CN208203373U (en) | 2018-05-09 | 2018-05-09 | A kind of preposition heat-exchange system of oxygen-eliminating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234663A (en) * | 2021-12-01 | 2022-03-25 | 东方电气集团东方汽轮机有限公司 | Industrial water replenishing and deoxidizing system and method for steam turbine |
-
2018
- 2018-05-09 CN CN201820687328.9U patent/CN208203373U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234663A (en) * | 2021-12-01 | 2022-03-25 | 东方电气集团东方汽轮机有限公司 | Industrial water replenishing and deoxidizing system and method for steam turbine |
| CN114234663B (en) * | 2021-12-01 | 2023-10-27 | 东方电气集团东方汽轮机有限公司 | Water supplementing and deoxidizing system and method for steam turbine industry |
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