CN218442246U - Temperature reduction system for heating steam - Google Patents
Temperature reduction system for heating steam Download PDFInfo
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- CN218442246U CN218442246U CN202222303445.XU CN202222303445U CN218442246U CN 218442246 U CN218442246 U CN 218442246U CN 202222303445 U CN202222303445 U CN 202222303445U CN 218442246 U CN218442246 U CN 218442246U
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- pump
- desuperheating
- heating steam
- water
- heating
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Abstract
The utility model discloses a temperature reduction system of heating steam, which relates to the technical field of combined heat and power heat supply, and comprises a heating steam source pipeline, a condensation water pipeline and a temperature reduction water pipeline, wherein the heating steam source pipeline is provided with a first pressure reducing valve and a temperature reducer, one end of the first pressure reducing valve is connected with the heating steam source, the other end of the first pressure reducing valve is connected with a steam inlet of the temperature reducer, and a steam outlet of the temperature reducer is connected with a heating user; the condensate water pipeline is provided with condensate pump, low pressure feed water pump, oxygen-eliminating device, leading pump, feed water pump, and condensate pump is connected to low pressure feed water pump one end, and the oxygen-eliminating device is connected to the other end, and the leading pump is connected to the oxygen-eliminating device, and leading pump connection desuperheating water pipeline, the desuperheating water import of desuperheating device is connected to the other end of desuperheating water pipeline, and the desuperheating water pipeline is provided with the pressure adjustment unit. The utility model discloses a pump outlet connection desuperheating water pipe way with leading, the desuperheater that will pass through after low pressure feed water heater, oxygen-eliminating device heating through desuperheating water pipe way offers the desuperheater, has improved heating economic nature.
Description
Technical Field
The utility model relates to a combined heat and power generation heat supply technical field especially relates to a temperature reduction system of heat supply steam.
Background
When the cogeneration unit supplies heat to the outside, the heat supply steam source is usually subjected to pressure reduction and temperature reduction to obtain heat supply steam meeting certain pressure and temperature parameters, and then the heat supply steam is supplied to heat supply users. For the requirements of heat supply steam with medium and low pressure (such as 3MPa, 240 ℃, 1MPa and 200 ℃), cold reheat steam is often selected as a heat supply steam source, pressure is reduced by an adjusting valve, and condensed water at the outlet of a condensed water pump is selected to be used as desuperheating water after being boosted by a booster pump for desuperheating.
In the existing heat supply steam system, cold reheat steam is taken as a heat supply steam source as an example, after pressure reduction is carried out through an adjusting valve, condensed water at an outlet of a condensed water pump is selected to be used as desuperheating water for temperature reduction after being boosted by a booster pump, and thus, heat supply steam with certain parameters is obtained after the cold reheat steam is subjected to pressure reduction and temperature reduction.
The condensed water of the existing scheme is used as desuperheating water, the condensed water at the outlet of the condensed water pump is not heated and is directly supplied to a desuperheater by a booster pump, so that the temperature difference between the desuperheating water and the heating steam is large, the heat for absorbing the heating steam is large, and the heating economy is low.
Accordingly, those skilled in the art have endeavored to develop a desuperheating system for supplying steam to increase the temperature of desuperheating water to improve heat economy.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model discloses the preferred working medium that has passed through turbo generator set backheat steam extraction system heating is as the desuperheating water to improve heating economy.
In order to achieve the purpose, the utility model provides a temperature reduction system for heating steam, which comprises a heating steam source pipeline, a condensation water pipeline and a temperature reduction water pipeline, wherein the heating steam source pipeline is provided with a first pressure reducing valve and a temperature reducer, one end of the first pressure reducing valve is connected with a heating steam source, the other end of the first pressure reducing valve is connected with a steam inlet of the temperature reducer, and a steam outlet of the temperature reducer is connected with a heating user; the condensate water pipeline is provided with a condensate pump, a low-pressure heater, a deaerator, a front pump and a water feeding pump, one end of the low-pressure heater is connected with the condensate pump, the other end of the low-pressure heater is connected with the deaerator, the deaerator is connected with the front pump, the front pump is connected with the desuperheating water pipeline and the water feeding pump, the other end of the desuperheating water pipeline is connected with a desuperheating water inlet of the desuperheater, and the desuperheating water pipeline is provided with a pressure adjusting unit.
In a preferred embodiment of the present invention, the pre-pump is a pneumatic pump coaxial with the feed pump.
Preferably, the pressure adjusting unit is a booster pump, one end of the booster pump is connected with the front pump, and the other end of the booster pump is connected with the desuperheater desuperheating water inlet.
In another preferred embodiment of the present invention, the pre-pump is a single-operation electric pump, and the rated outlet pressure of the single-operation electric pump is higher than the heating steam extraction pressure requirement.
Preferably, the separately operated electric pump is a separately variable frequency operated electric pump.
Preferably, the pressure adjusting unit is a second pressure reducing valve, one end of the second pressure reducing valve is connected with the pre-pump, and the other end of the second pressure reducing valve is connected with the desuperheater desuperheating water inlet.
Preferably, the condensation water pipeline is further provided with a boiler, and the boiler is connected with the feed water pump.
Preferably, the condensed water pipeline is further provided with a condenser, and the condenser is connected with the condensed water pump.
Preferably, the low-pressure heater is a horizontal shell-and-tube heater.
Preferably, the number of the low pressure heaters is at least one.
The beneficial effects of the utility model are that:
1. the desuperheating water pipeline is connected with the outlet of the preposed pump, and the desuperheating water heated by the low-pressure heater and the deaerator is supplied to the desuperheater through the desuperheating water pipeline, so that the backheating steam extraction quantity of the low-pressure heater and the deaerator is increased, the temperature difference between the desuperheating water and the heating steam is reduced, the heat of the absorbed heating steam is reduced, and the heating economy is improved;
2. the preposed pump is an independent electric pump, and the rated outlet pressure is higher than the requirement of heat supply steam extraction pressure, so that a booster pump can be eliminated, a pressure reducing valve is additionally arranged, the system is simplified, the investment is reduced, and the heat supply economy is improved.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic view of a system for reducing temperature of heating steam according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a system for reducing the temperature of heating steam according to another preferred embodiment of the present invention.
In the attached drawings, 1, a heating steam source; 2. a first pressure reducing valve; 3. a desuperheater; 4. a heat supply user; 5. a condensate pump; 6. a low pressure heater; 7. a deaerator; 8. a pre-pump; 9. a booster pump; 10. a feed pump; 11. a boiler; 12. a condenser; 13. a second pressure reducing valve.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components has been exaggerated in some places in the drawings where appropriate for clarity of illustration.
As shown in fig. 1, in a preferred embodiment of the present invention, the temperature reduction system for heating steam comprises a heating steam source pipeline, a condensed water pipeline and a temperature reduction water pipeline, wherein the heating steam source pipeline is provided with a first pressure reducing valve 2 and a temperature reducer 3, one end of the first pressure reducing valve 2 is connected to a heating steam source 1, the other end of the first pressure reducing valve is connected to a steam inlet of the temperature reducer 3, and a steam outlet of the temperature reducer 3 is connected to a heating user 4; the condensate water pipeline is provided with condensate water pump 5, low pressure feed water heater 6, oxygen-eliminating device 7, leading pump 8, water feed pump 10, 6 one end of low pressure feed water heater is connected condensate water pump 5, the other end is connected oxygen-eliminating device 7, oxygen-eliminating device 7 is connected leading pump 8, leading pump 8 is connected the desuperheating water pipeline with water feed pump 10, leading pump 8 is the pneumatic pump coaxial with water feed pump 10, the other end of desuperheating water pipeline is connected the desuperheating water import of desuperheater 3, the desuperheating water pipeline is provided with booster pump 9, booster pump 9 one end with leading pump 8 is connected, the other end with 3 desuperheating water access connection of desuperheater.
Condensed water heated by the low-pressure heater 6 and the deaerator 7 is supplied to the deaerator 3 through the temperature-reducing water pipeline, the heat regeneration steam extraction quantity of the low-pressure heater 6 and the deaerator 7 is increased, the temperature difference between the temperature-reducing water and the heating steam is reduced, the heat of absorbing the heating steam is reduced, the heating economy is improved, and the heating steam which obtains certain parameters after the temperature reduction is carried out on the heating steam is provided for heating users.
The medium-pressure water from the front pump 8 is pressurized by the booster pump 9 and then enters the desuperheater 3 as desuperheater water to meet the requirement of heat supply steam extraction pressure.
As shown in fig. 2, in another embodiment of the present invention, the temperature reduction system for heating steam includes a heating steam source pipeline, a condensed water pipeline and a temperature reduction water pipeline, the heating steam source pipeline is provided with 2 a first pressure reducing valve and a temperature reducer 3, one end of the first pressure reducing valve 2 is connected to a heating steam source 1, the other end is connected to the temperature reducer 3, and the temperature reducer 3 is connected to a heating user 4; the condensate pipe way is provided with condensate pump 5, low pressure feed water heater 6, oxygen-eliminating device 7, leading pump 8, 6 one end connections of low pressure feed water heater 5, the other end is connected oxygen-eliminating device 7, oxygen-eliminating device 7 is connected leading pump 8, leading pump 8 is connected desuperheating water pipe way and water-feeding pump 10, leading pump 8 is the electric pump of independent operation, and is preferred, leading pump 8 is the electric pump of independent frequency conversion operation, and the rated outlet pressure of the electric pump of independent operation is higher than heat supply steam extraction pressure demand. The desuperheating water pipeline is provided with a second reducing valve 13, one end of the second reducing valve 13 is connected with the front pump 8, and the other end of the second reducing valve is connected with the low-temperature water inlet of the desuperheater 3.
Through setting up independent power frequency electric pre-pump, need not set up booster pump 9 in the de-superheating water pipeline, through setting up second relief pressure valve 13 satisfies heat supply extraction pressure demand, and then the simplified system, reduces the investment, improves heating economic nature.
The condensation water pipeline is further provided with a boiler 11, and the boiler 11 is connected with the feed pump 10.
The condensed water pipeline is further provided with a condenser 12, and the condenser 12 is connected with the condensed water pump 5.
The utility model discloses an embodiment to adopt cold reheat steam to supply heat externally for example in certain 1000MW unit THA operating mode, and heat supply steam parameter demand is: 1.2MPa, 200 ℃ and 200t/h. The front pump 8 and the feed pump 10 of the unit run coaxially and at variable speeds.
Prior art scheme comparative example 1: cold and hot steam is 5.8MPa, 360 ℃ and 182.4t/h, condensed water is 3.5MPa, 30.2 ℃ and 17.6t/h;
the embodiment of the technical scheme of the utility model is that: cold and hot steam is 5.8MPa, 360 ℃ and 177.4t/h, condensed water is 3.6MPa, 182.1 ℃ and 22.6t/h;
compared with the prior art, the technical proposal of the utility model has the advantages that the heat consumption of the unit is gained by 7 kJ/(kW.h).
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art without the use of inventive faculty. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A temperature reduction system for heating steam is characterized by comprising a heating steam source pipeline, a condensed water pipeline and a temperature reduction water pipeline, wherein the heating steam source pipeline is provided with a first pressure reducing valve and a temperature reducer, one end of the first pressure reducing valve is connected with a heating steam source, the other end of the first pressure reducing valve is connected with a steam inlet of the temperature reducer, and a steam outlet of the temperature reducer is connected with a heating user; the condensate pipe way is provided with condensate pump, low pressure feed water heater, oxygen-eliminating device, leading pump, water feed pump, low pressure feed water heater one end is connected condensate pump, the other end is connected the oxygen-eliminating device, the oxygen-eliminating device is connected leading pump, leading pump connection the desuperheating water pipe way with the water feed pump, the other end of desuperheating water pipe way is connected the desuperheating water import of desuperheating device, the desuperheating water pipe way is provided with the pressure adjustment unit.
2. A desuperheating system for heating steam as claimed in claim 1 wherein said pre-pump is a steam driven pump coaxial with said feedwater pump.
3. A desuperheating system for heating steam as claimed in claim 2 wherein said pressure regulating unit is a booster pump, one end of said booster pump being connected to said pre-pump and the other end being connected to said desuperheater desuperheating water inlet.
4. A system for attemperation of heating steam as recited in claim 1, wherein the pre-pump is a separately operating electric pump rated for outlet pressure higher than heating extraction pressure requirements.
5. A desuperheating system for heating steam as claimed in claim 4 wherein said pre-pump is a single variable frequency operated electric pump.
6. A desuperheating system for supplying steam as claimed in any of claims 4 to 5 wherein said pressure regulating unit is a second pressure reducing valve, one end of said second pressure reducing valve being connected to said pre-pump and the other end being connected to said desuperheater desuperheating water inlet.
7. A system for attemperation of heating steam as claimed in claim 1 wherein said condensed water line is further provided with a boiler, said boiler being connected to said feedwater pump.
8. A desuperheating system for supplying heating steam as claimed in claim 1, wherein said condensate line is further provided with a condenser, said condenser being connected to said condensate pump.
9. A desuperheating system for heating steam as claimed in claim 1 wherein said low pressure heater is a horizontal, shell and tube heater.
10. A system for attemperation of heating steam as recited in claim 1, wherein a number of the low pressure heaters is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222303445.XU CN218442246U (en) | 2022-08-31 | 2022-08-31 | Temperature reduction system for heating steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222303445.XU CN218442246U (en) | 2022-08-31 | 2022-08-31 | Temperature reduction system for heating steam |
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| Publication Number | Publication Date |
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| CN218442246U true CN218442246U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222303445.XU Active CN218442246U (en) | 2022-08-31 | 2022-08-31 | Temperature reduction system for heating steam |
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| CN (1) | CN218442246U (en) |
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2022
- 2022-08-31 CN CN202222303445.XU patent/CN218442246U/en active Active
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