CN209925035U - Low-vacuum operation circulating water waste heat recovery device - Google Patents
Low-vacuum operation circulating water waste heat recovery device Download PDFInfo
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- CN209925035U CN209925035U CN201820307006.7U CN201820307006U CN209925035U CN 209925035 U CN209925035 U CN 209925035U CN 201820307006 U CN201820307006 U CN 201820307006U CN 209925035 U CN209925035 U CN 209925035U
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Abstract
The utility model relates to a low vacuum operation circulating water waste heat recovery device, including the steam turbine, a steam outlet of steam turbine is connected with the condenser, the condenser is connected with one-level water supply pipe system, one-level water supply pipe system is connected with the first heat exchanger, the first heat exchanger is connected with second grade return water pipe, still be connected with one-level net return water outer circulating system on the second grade net water supply system. The water condenser is also connected with a cooling water circulating system; and the other outlet of the steam turbine is also connected with an auxiliary heating system, the auxiliary heating system is connected with a primary water supply system, and the auxiliary heating system is also connected with a heating system. And ball valves are arranged on the cooling water circulation system, the primary net backwater external circulation system and the heating system. The utility model discloses can realize utilizing the waste heat of gas condenser and reducing the return water temperature of one-level net under the temperature demand of difference, furthest utilizes waste heat resource.
Description
Technical Field
The utility model belongs to the waste heat recovery utilizes the field, concretely relates to low vacuum operation circulating water waste heat recovery device.
Background
In the existing cogeneration power plant, the power utilization rate of the gas turbine and the steam turbine exceeds 60%, and part of low-grade heat energy is dissipated to the atmosphere by a cooling tower, in order to better utilize the part of waste heat, hot cooling water from a condenser is generally used for heating by resident power, a heater is additionally arranged at an outlet of the condenser to carry out multistage temperature elevation on circulating water, and relatively high-temperature water is used for heating, so that the purpose of utilizing the waste heat of the condenser more is achieved, but the return water temperature is also raised to reach 55-65 ℃, and the steam turbine and the condenser are serious potential safety hazards. Meanwhile, if the steam turbine fails in the heating season in winter, the steam turbine will have great influence on the residents who are heating, and the heating quality cannot be completely guaranteed.
Disclosure of Invention
The utility model discloses a low vacuum operation circulating water waste heat recovery device, return water temperature is high in the waste heat utilization that aim at solved the existence at present, is serious potential safety hazard problem to steam turbine and condenser to and improve the stability promotion of heat supply.
The technical scheme of the utility model as follows:
a low-vacuum operation circulating water waste heat recovery device comprises a steam turbine, wherein a steam outlet of the steam turbine is connected with a condenser, an air inlet end of the condenser is connected with a primary water supply pipeline, a cooling water inlet of the condenser is connected with a primary water return pipeline, and a main circulating water pump is arranged on the primary water supply pipeline; the primary water supply pipeline and the primary water return pipeline are connected with a primary heat exchanger for heat exchange to form a circulation loop, a water outlet of the primary heat exchanger is connected with a secondary water supply pipeline, the secondary water supply pipeline is connected with a heat user, and a water inlet of the primary heat exchanger is connected with a secondary water return pipeline to form a circulation loop; a circulating water pump is arranged on the secondary water supply pipeline, a flowmeter B is arranged in front of the circulating water pump, a primary network backwater external circulating system is also connected to the secondary water supply pipeline, one end of the primary network backwater external circulating system is connected with a primary backwater pipeline, and the other end of the primary network backwater external circulating system is connected with the secondary water supply pipeline; the circulating system consisting of the primary water supply pipeline and the primary water return pipeline is also connected with an auxiliary heat supply system, the auxiliary heat supply system comprises a small condenser connected with the gas outlet of the steam turbine, the water outlet of the small condenser is connected with one end of the auxiliary water supply pipeline, the other end of the auxiliary water supply pipeline is connected with the primary water supply pipeline, the water inlet of the small condenser is connected with an auxiliary water return pipeline, and the other end of the auxiliary water return pipeline is connected with the primary water return pipeline; and the auxiliary heating system is also connected with a heating system.
Further, the primary net backwater external circulation system comprises a primary backwater external circulation water pipe, a ball valve A is arranged on the primary backwater external circulation water pipe, and a flowmeter A is further arranged on the primary backwater external circulation water pipe.
Further, be connected with cooling circulation water supply pipe on the one-level water supply pipeline of condenser export, cooling circulation water supply pipe is connected with cooling device's entry, cooling device's exit linkage has the cooling return water pipeline, the cooling return water pipeline is connected on one-level return water pipeline, be provided with ball valve C on the cooling circulation water supply pipeline.
Furthermore, a return water dirt separator is connected to the primary return water pipeline.
Furthermore, the heating system comprises a heater, an inlet of the heater is connected with one end of a water inlet pipeline of the heating system, the other end of the water inlet pipeline of the heating system is connected with an auxiliary water return pipeline, a water outlet of the heater is connected with one end of a water outlet pipeline of the heating system, the other end of the water outlet pipeline of the heating system is connected with an auxiliary water supply pipeline, and a ball valve B is arranged on the water inlet pipeline of the heating system.
Furthermore, an auxiliary circulating pump and a ball valve D are arranged on the auxiliary water supply pipeline.
The utility model has the advantages as follows:
1. the utility model discloses a steam turbine is connected with the condenser, and the condenser links to each other with one-level net circulation system, and one-level net circulation system carries out the heat transfer through head station heat exchanger and second grade net, and one-level return water pipeline is connected with second grade net water supply pipe through the ball valve, can realize under the condition that utilizes the condenser, also can recycle through one-level net return water, effectively reduces one-level net return water temperature to reduce the harm of high return water temperature to condenser and steam turbine.
2. The utility model discloses in still including supplementary heating system, directly let in small-size condenser by a steam outlet of steam turbine, carry out the thermal replenishment of one-level net, when condenser water supply system can not reach the second grade net water supply demand, can realize the heat replenishment to one-level net water supply through control flap's switch.
3. The utility model discloses a be connected with heating system on the auxiliary heating system, when the water supply temperature demand further risees, can control ball valve B's switch, make auxiliary heating system's return water reentrant the heater in heat to on the water after will heating passes through heating system outlet pipe and imports auxiliary heating system's auxiliary water supply pipeline, provide the heat for one-level net circulation system, further guaranteed the heat supply demand of second grade net.
4. The utility model discloses a condenser still is connected with cooling device, cooling device can handle the unnecessary heat of condenser in non-heating season to prevent heating system to produce big influence with power generation system's system.
Drawings
Fig. 1 is an overall schematic view of the present invention;
in the figure: 1 steam turbine, 2 condensers, 3 main circulating pump, 4 and water supply pipeline, 5 one-level return water pipeline, 6 first station heat exchangers, 7 second grade water supply pipeline, 8 circulating water pump, 9 hot users, 10 second grade return water pipeline, 11 one-level return water extrinsic cycle water pipe, 12 flowmeter A, 13 ball valve A, 14 return water dirt separator, 15 small-size condensers, 16 auxiliary water supply pipeline, 17 auxiliary circulating pump, 18 auxiliary water return pipeline, 19 heaters, 20 ball valve B, 21 flowmeter B, 22 cooling device, 23 cooling cycle water supply pipeline, 24 cooling cycle return water pipeline, 25 ball valve C, 26 ball valve D.
Detailed Description
The technical scheme of the utility model is described in detail with the accompanying drawings and the embodiments as follows:
a low-vacuum operation circulating water waste heat recovery device is shown in figure 1 and comprises a steam turbine 1, wherein a steam outlet of the steam turbine 1 is connected with a condenser 2, an air inlet end of the condenser 2 is connected with a primary water supply pipeline 4, a cooling water inlet of the condenser 2 is connected with a primary water return pipeline 5, and a main circulating water pump 3 is arranged on the primary water supply pipeline 4; the primary water supply pipeline 4 and the primary water return pipeline 5 are connected with a primary heat exchanger 6 for heat exchange to form a circulation loop, the water outlet of the primary heat exchanger 6 is connected with a secondary water supply pipeline 7, the secondary water supply pipeline 7 is connected with a heat user 9, and the water inlet of the primary heat exchanger 6 is connected with a secondary water return pipeline 10 to form a circulation loop; and a circulating water pump 8 is arranged on the secondary water supply pipeline 7, and a flow meter B21 is arranged in front of the circulating water pump 8.
A primary network backwater external circulation system is connected to the secondary water supply pipeline 7, one end of the primary network backwater external circulation system is connected with the primary backwater pipeline 5, and the other end of the primary network backwater external circulation system is connected with the secondary water supply pipeline 7; the primary net backwater external circulation system comprises a primary backwater external circulation water pipe 11, a ball valve A13 is arranged on the primary backwater external circulation water pipe 11, a flowmeter A12 is further arranged on the primary backwater external circulation water pipe 11, and a backwater dirt separator 14 is connected to the primary backwater pipeline 5.
The circulation system that one-level water supply pipe 4 and one-level return water pipe 5 are constituteed still is connected with supplementary heating system, supplementary heating system includes the small-size condenser 15 that is connected with 1 gas outlet of steam turbine, the delivery port of small-size condenser 15 is connected with the one end of supplementary water supply pipe 16, the other end of supplementary water supply pipe 16 is connected with one-level water supply pipe 4, the water inlet of small-size condenser 15 is connected with supplementary return water pipe 18, the other end of supplementary return water pipe 18 be connected with one-level return water pipe 5, be provided with auxiliary circulating pump 17 and ball valve D26 on the supplementary water supply pipe 16.
Still be connected with heating system on the supplementary heating system, heating system includes heater 19, the entry of heater 19 is connected with the one end of heating system inlet channel, the other end of heating system inlet channel is connected with supplementary return water pipe 18, the delivery port of heater 19 is connected with the one end of heating system outlet conduit, the other end of heating system outlet conduit is connected with supplementary water supply pipe 16, be provided with ball valve B20 on the heating system inlet channel.
Be connected with cooling circulation water supply pipe 23 on the one-level water supply pipe 4 of 2 exports of condenser, cooling circulation water supply pipe 23 is connected with cooling device 22's entry, cooling device's exit linkage has cooling return water pipe 24, cooling return water pipe 24 connects on one-level return water pipe 5, be provided with ball valve C25 on the cooling circulation water supply pipe 23.
Several conditions of the operation of the technical scheme are described through specific embodiments:
example 1
When the waste heat of condenser can satisfy the second grade water supply temperature demand, and when one-level net return water temperature was less than 40 ℃, ball valve A13, ball valve B20, ball valve C25 and ball valve D26 were closed, and the steam extraction of steam turbine 1 gas outlet enters into condenser 2, and the one-level net circulation system that is connected with condenser 2 absorbs the exhaust waste heat, carries out the heat exchange at first station heat exchanger 6 and second grade net circulation system, second grade net circulation system is under circulating water pump 8's drive, for heat user 9 supplies heat.
Example 2
When the waste heat step of the condenser can meet the requirement of the secondary water supply temperature, and the return water temperature is higher than 40 ℃, the ball valve A13 is opened, the ball valve B20, the ball valve C25 and the ball valve D26 are closed, the return water of the primary network is introduced into the secondary water supply pipeline 7 through the primary return water external circulation water pipe 11, the flow on the water supply pipeline is displayed by the flowmeter A12, and the reference is provided for the water quantity control of the system.
Example 3
When the condition in the embodiment 2 can not meet the heating demand of the customer, the ball valve A13, the ball valve D26 are opened, the ball valve B20 and the ball valve C25 are closed, on the basis of the embodiment 2, the exhaust steam of the steam turbine 1 enters the small condenser 15 through one port on the steam turbine 1, the small condenser 15 exchanges heat with the auxiliary heating system, and the water in the auxiliary water supply pipeline 16 is introduced into the primary water supply pipeline 4 through the auxiliary circulating pump 17 to provide auxiliary heating for the circulation of the secondary network.
Example 4
When the conditions in the embodiment 3 can not meet the heating requirement of the customer, the ball valves A13, D26 and B20 are opened, the ball valve C25 is closed, on the basis of the embodiment 3, the auxiliary water return pipeline 18 of the auxiliary heating system is connected with the water inlet pipeline of the heating system, and after being heated by the heater 19, the output pipeline is connected with the auxiliary water supply pipeline 16 to jointly provide heat for the heat exchange of the secondary circulation.
Example 5
When the steam turbine is not in the heating season, the ball valve A13 is opened, the ball valve B20 and the ball valve D26 are closed, the ball valve C25 is opened and connected with a cooling system, water supply in the primary water supply pipeline is led into the cooling device 22 through the cooling circulation water supply pipeline, return water of the cooling device is connected with the primary return water pipeline 5 through the cooling circulation return water pipeline 24, and cooling of steam turbine exhaust steam in the non-heating season is facilitated.
Claims (6)
1. A low-vacuum operation circulating water waste heat recovery device comprises a steam turbine (1), wherein a steam outlet of the steam turbine (1) is connected with a condenser (2), an air inlet end of the condenser (2) is connected with a primary water supply pipeline (4), a cooling water inlet of the condenser (2) is connected with a primary water return pipeline (5), and a main circulating water pump (3) is arranged on the primary water supply pipeline (4); the method is characterized in that: the primary water supply pipeline (4) and the primary water return pipeline (5) are connected with a primary heat exchanger (6) for heat exchange to form a circulation loop, a water outlet of the primary heat exchanger (6) is connected with a secondary water supply pipeline (7), the secondary water supply pipeline (7) is connected with a heat user (9), and a water inlet of the primary heat exchanger (6) is connected with a secondary water return pipeline (10) to form a circulation loop; a circulating water pump (8) is arranged on the secondary water supply pipeline (7), a flowmeter B (21) is arranged in front of the circulating water pump (8), a primary network backwater external circulating system is also connected to the secondary water supply pipeline (7), one end of the primary network backwater external circulating system is connected with the primary backwater pipeline (5), and the other end of the primary network backwater external circulating system is connected with the secondary water supply pipeline (7); the circulating system consisting of the primary water supply pipeline (4) and the primary water return pipeline (5) is also connected with an auxiliary heat supply system, the auxiliary heat supply system comprises a small condenser (15) connected with an air outlet of the steam turbine (1), a water outlet of the small condenser (15) is connected with one end of an auxiliary water supply pipeline (16), the other end of the auxiliary water supply pipeline (16) is connected with the primary water supply pipeline (4), a water inlet of the small condenser (15) is connected with an auxiliary water return pipeline (18), and the other end of the auxiliary water return pipeline (18) is connected with the primary water return pipeline (5); and the auxiliary heating system is also connected with a heating system.
2. The low-vacuum operation circulating water waste heat recovery device of claim 1, characterized in that: the primary net backwater external circulation system comprises a primary backwater external circulation water pipe (11), a ball valve A (13) is arranged on the primary backwater external circulation water pipe (11), and a flowmeter A (12) is further arranged on the primary backwater external circulation water pipe (11).
3. The low-vacuum operation circulating water waste heat recovery device according to claim 1 or 2, characterized in that: be connected with cooling circulation water supply pipe (23) on one-level water supply pipe (4) of condenser (2) export, cooling circulation water supply pipe (23) are connected with the entry of cooling device (22), cooling device's exit linkage has cooling return water pipe (24), cooling return water pipe (24) are connected on one-level return water pipe (5), be provided with ball valve C (25) on cooling circulation water supply pipe (23).
4. The low-vacuum operation circulating water waste heat recovery device of claim 3, characterized in that: and the primary water return pipeline (5) is connected with a water return dirt separator (14).
5. The low-vacuum operation circulating water waste heat recovery device according to claim 1 or 2, characterized in that: the heating system comprises a heater (19), an inlet of the heater (19) is connected with one end of a water inlet pipeline of the heating system, the other end of the water inlet pipeline of the heating system is connected with an auxiliary water return pipeline (18), a water outlet of the heater (19) is connected with one end of a water outlet pipeline of the heating system, the other end of the water outlet pipeline of the heating system is connected with an auxiliary water supply pipeline (16), and a ball valve B (20) is arranged on the water inlet pipeline of the heating system.
6. The low-vacuum operation circulating water waste heat recovery device of claim 1, characterized in that: and an auxiliary circulating pump (17) and a ball valve D (26) are arranged on the auxiliary water supply pipeline (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307006.7U CN209925035U (en) | 2018-03-06 | 2018-03-06 | Low-vacuum operation circulating water waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307006.7U CN209925035U (en) | 2018-03-06 | 2018-03-06 | Low-vacuum operation circulating water waste heat recovery device |
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| Publication Number | Publication Date |
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| CN209925035U true CN209925035U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820307006.7U Active CN209925035U (en) | 2018-03-06 | 2018-03-06 | Low-vacuum operation circulating water waste heat recovery device |
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| Country | Link |
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| CN (1) | CN209925035U (en) |
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2018
- 2018-03-06 CN CN201820307006.7U patent/CN209925035U/en active Active
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