CN204002956U - A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan - Google Patents
A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan Download PDFInfo
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- CN204002956U CN204002956U CN201420393297.8U CN201420393297U CN204002956U CN 204002956 U CN204002956 U CN 204002956U CN 201420393297 U CN201420393297 U CN 201420393297U CN 204002956 U CN204002956 U CN 204002956U
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Abstract
A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan, the condensed steam type small turbine that comprises main steam turbine and be connected with induced draught fan, the exhaust vent of small turbine is connected with small turbine vapour condenser, and the exhaust vent of main steam turbine is connected with main frame vapour condenser, condensate pump, precision processing device of condensation water, shaft sealing cooler and low pressure heat regenerative system successively; The outlet of shaft sealing cooler is also connected with the cooling water inlet of small turbine vapour condenser through water of condensation branch road pipeline, the water of condensation export pipeline of the coolant outlet of small turbine vapour condenser and small turbine vapour condenser meets at coagulation hydroenergy backwater pipeline, and the outlet of coagulation hydroenergy backwater pipeline is connected with low pressure heat regenerative system.The utility model utilizes main frame water of condensation can fully reclaim small turbine exhausted spare heat as the cooling water source of small turbine vapour condenser, the total cold source energy of minimizing system, and system is relatively simple, and operation maintenance workload is less, can be common to water chiller and Air-cooled Unit.
Description
Technical field
The utility model belongs to station boiler and turbine system field, is specifically related to a kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan.
Background technique
Along with the maximization increasingly of coal-fired power plant's capacity, and the deep popularization execution of environmental transformation, the capacity of boiler induced-draft fan also increases thereupon.Induced draught fan capacity has brought station service increase, inrush current large after increasing, and station service electric pressure such as need to improve at the problem.For making full use of primary energy, excavate boiler, steam turbine potentiality, improve the power supply capacity of unit, adopt small turbine instead of electric motor to drive induced draught fan to become a kind of trend.Conventional small turbine has two kinds of back pressure type and condensed steam types, and condensed steam type small turbine has better power savings advantages, but investment is also relatively high.Conventional condensed steam type small turbine, using electric power plant circulating water as cooling water source, need to be set up separately cooling water system and the relevant equipment and system such as filter screen, circulating water pump in the time building.Electric power plant circulating water clean degree is poor, and after long-time running, fouling situation aggravation in small condenser tube bank, causes temperature conductivity to decline, and the small turbine steam consumption increases.The operation maintenance workload of power plant and water consumption also increase thereupon simultaneously.In addition, small turbine Cooling Tubes of Condenser bundle need carry out selection according to the water quality of circulating water, if the water quality that puts into operation is poor, may cause small condenser manufacture cost further to increase.If for Air-cooled Unit, also need additionally to build mechanical force cooling column, construction cost and water consumption also will continue to increase.On the whole, condensed steam type induced draught fan small turbine system construction investment that power plant puts into operation is large, operation maintenance workload is large, system complex, has limited greatly it and has extensively promoted.
In sum, develop that a kind of stable and reliable operation, system are relatively simple, operation maintenance workload is less, amount of energy saving significantly, the condensed steam type induced draught fan small turbine that can be common to water chiller and Air-cooled Unit is significant.
Model utility content
The purpose of this utility model is to provide a kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan, and this system run all right is reliable, maintenance workload is less and amount of energy saving is remarkable.
In order to achieve the above object, the technical solution adopted in the utility model is: the condensed steam type small turbine that comprises main steam turbine and be connected with induced draught fan, the exhaust vent of condensed steam type small turbine is connected with small turbine vapour condenser, and the exhaust vent of main steam turbine is connected with main frame vapour condenser, condensate pump, precision processing device of condensation water, shaft sealing cooler and low pressure heat regenerative system successively; The outlet of shaft sealing cooler is also connected with the cooling water inlet of small turbine vapour condenser through water of condensation branch road pipeline, the water of condensation export pipeline of the coolant outlet of small turbine vapour condenser and small turbine vapour condenser meets at coagulation hydroenergy backwater pipeline, and the outlet of coagulation hydroenergy backwater pipeline is connected with low pressure heat regenerative system.
Described low pressure heat regenerative system by the backwater point being connected before after low-pressure heater group and backwater point low-pressure heater group form, the outlet of shaft sealing cooler is connected with the entrance of low-pressure heater group before the entrance of water of condensation branch road pipeline and backwater point respectively through deaerator level control valve group, and the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of low-pressure heater group after backwater point.
Described low pressure heat regenerative system by the final stage low-pressure heater being communicated with successively, inferior final stage low-pressure heater and backwater point after low-pressure heater group, and the outlet of shaft sealing cooler is connected with final stage low-pressure heater, after the entrance of the outlet of coagulation hydroenergy backwater pipeline and inferior final stage low-pressure heater or backwater point, the entrance of low-pressure heater group is connected.
After described inferior final stage low-pressure heater and backwater point, between low-pressure heater group, be provided with deaerator level control valve group, the entrance of deaerator level control valve group is connected with the outlet of coagulation hydroenergy backwater pipeline with the outlet of inferior final stage low-pressure heater respectively.
Described water of condensation branch road pipeline is provided with flow control valve.
Between the entrance and exit of described flow control valve, be connected by the spare duct that is provided with stop valve.
The water of condensation export pipeline of described small turbine vapour condenser is provided with the some little condensate pump being connected in parallel.
Compared with prior art, the beneficial effects of the utility model are:
1) main steam turbine of the present utility model is connected with main frame vapour condenser, the main frame water of condensation that main frame vapour condenser produces can replace the steam discharge of traditional electric power plant circulating water as the cooling small turbine being connected with condensed steam type induced draught fan of cooling water source, thereby the water quality of the cooling water source of small turbine vapour condenser is improved, remove the workload of small condenser periodic cleaning from, also be conducive to reduce the leakage of small condenser tube bank simultaneously, improve its operating conditions, improve the operational reliability of equipment.And the main frame water of condensation producing using main frame vapour condenser, as cooling water source, can fully reclaim small turbine exhausted spare heat, its advantageous effects is similar to low-level (stack-gas) economizer, has increased the amount of energy saving of system.
2) the main frame water of condensation that the utility model produces using main frame vapour condenser, as cooling water source, can be led in water chiller and Air-cooled Unit, has removed the construction cost of Air-cooled Unit small turbine building machine cooling tower etc. from.
3) the main frame water of condensation that the utility model produces using main frame vapour condenser, as cooling water source, than using circulating water as cooling water source, is conducive to reduce the water consumption that generating is produced.
4) the main frame water of condensation that main frame vapour condenser produces is drawn from condensate pump outlet, saves the correlative investment of small turbine circulating water pump, has also removed the construction cost that circulating water pipeline system pipe laying is arranged simultaneously from, has simplified system, is conducive to reduce investment.
Brief description of the drawings
Fig. 1 is a kind of condensed steam type small turbine exhaust steam waste heat utilization system schematic that drives induced draught fan of the utility model;
Fig. 2 is the another kind of condensed steam type small turbine exhaust steam waste heat utilization system schematic that drives induced draught fan of the utility model;
Wherein, 1, solidifying gas formula small turbine, 2, induced draught fan, 3, small turbine vapour condenser, 4, little condensate pump, 5, main steam turbine, 6, main frame vapour condenser, 7, condensate pump, 8, precision processing device of condensation water, 9, shaft sealing cooler, 10, deaerator level control valve group, 11, flow control valve, 12, stop valve, 13, low-pressure heater group before backwater point, 14, low-pressure heater group after backwater point.15, final stage low-pressure heater, 16, inferior final stage low-pressure heater.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, the solidifying gas formula small turbine 1 that the utility model comprises main steam turbine 5 and is connected with induced draught fan 2, the exhaust vent of solidifying gas formula small turbine 1 is connected with small turbine vapour condenser 3, and the exhaust vent of main steam turbine 5 is connected with main frame vapour condenser 6, condensate pump 7, precision processing device of condensation water 8, shaft sealing cooler 9 successively and low pressure heat regenerative system is connected, the outlet of shaft sealing cooler 9 is also connected with the cooling water inlet of small turbine vapour condenser 3 through water of condensation branch road pipeline, the water of condensation export pipeline of the coolant outlet of small turbine vapour condenser 3 and small turbine vapour condenser 3 meets at coagulation hydroenergy backwater pipeline, the outlet of coagulation hydroenergy backwater pipeline is connected with low pressure heat regenerative system, and water of condensation branch road pipeline is provided with flow control valve 11, between the entrance and exit of flow control valve 11, be also connected by the spare duct that is provided with stop valve 12, in order to control the condensing water flow that enters small turbine vapour condenser, stop valve 12 is standby valve, in normal off status, in the time of flow control valve 11 fault, come into operation.The water of condensation export pipeline of small turbine vapour condenser 3 is provided with some the little condensate pumps 4 (preferably two) that are connected in parallel, when wherein one go wrong, use another.In addition, in the outlet port of the utility model shaft sealing cooler 9 or low pressure heat regenerative system, be provided with deaerator level control valve group 10.
As shown in Figure 1, low pressure heat regenerative system of the present utility model by the backwater point being connected before after low-pressure heater group 13 and backwater point low-pressure heater group 14 form, the outlet of shaft sealing cooler 9 is connected with the entrance of low-pressure heater group 13 before the entrance of water of condensation branch road pipeline and backwater point respectively through deaerator level control valve group 10, and the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of low-pressure heater group 14 after backwater point.
The running principle of system is as shown in Figure 1: before operation, ensure that deaerator level control valve group 10, flow control valve 11 open, stop valve 12 is standby valve, in normal off status.
The steam discharge of main steam turbine 5 produces main frame water of condensation after main frame vapour condenser 6 condenses, main frame water of condensation is divided into two-way through precision processing device of condensation water 8, shaft sealing cooler 9 and deaerator level control valve group 10 after condensate pump 7 boosts, the flow control valve 11 of one tunnel on water of condensation branch road pipeline enters the cooling water inlet of small turbine vapour condenser 3 in order to the steam discharge of the cooling small turbine being connected with condensed steam type induced draught fan, and reclaims the waste heat in the steam discharge of small turbine; Another road successively after low-pressure heater group 13 before backwater point and backwater point low-pressure heater group 14 discharge; Main frame water of condensation after recovery waste heat is from the coolant outlet of small turbine vapour condenser 3 flows out, the water of condensation that main frame water of condensation after recovery waste heat and small turbine vapour condenser 3 produce meets at coagulation hydroenergy backwater pipeline, then enters low-pressure heater group 14 after backwater point.
As shown in Figure 2, the utility model comprises successively low-pressure heater group 14 after final stage low-pressure heater 15, inferior final stage low-pressure heater 16, deaerator level control valve group 10 and the backwater point being communicated with, the outlet of shaft sealing cooler 9 is connected with final stage low-pressure heater 15, and the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of inferior final stage low-pressure heater 16 or the entrance of deaerator level control valve group 10.
The working principle of system is as shown in Figure 2: before operation, ensure that deaerator level control valve group 10, flow control valve 11 open, stop valve 12 is standby valve, in normal off status.
The steam discharge of main steam turbine 5 produces main frame water of condensation after main frame vapour condenser 6 condenses, main frame water of condensation is after condensate pump 7 boosts, after precision processing device of condensation water 8, shaft sealing cooler 9, be divided into two-way, one tunnel enters the cooling water inlet of small turbine vapour condenser 3 in order to the steam discharge of the cooling solidifying gas formula small turbine being connected with condensed steam type induced draught fan through flow control valve 11, and reclaims the waste heat in the steam discharge that coagulates gas formula small turbine; Discharge after low-pressure heater group 14 successively after final stage low-pressure heater 15, inferior final stage low-pressure heater 16, deaerator level control valve group 10 and backwater point on another road.Main frame water of condensation after recovery waste heat is from the coolant outlet of small turbine vapour condenser 3 flows out, the water of condensation that main frame water of condensation after recovery waste heat and small turbine vapour condenser 3 produce meets at coagulation hydroenergy backwater pipeline, then after backwater point low-pressure heater group 14 after processing, discharge or main frame water of condensation after recovery waste heat from the coolant outlet of small turbine vapour condenser 3 flows out, the water of condensation that the main frame water of condensation after recovery waste heat and small turbine vapour condenser 3 produce meets at coagulation hydroenergy backwater pipeline;
In the time that the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of inferior final stage low-pressure heater 16, the water of condensation that the main frame water of condensation after recovery waste heat and small turbine vapour condenser 3 produce enters low-pressure heater group 14 through time final stage low-pressure heater 16, deaerator level control valve group 10;
In the time that the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of deaerator level control valve group 10, the water of condensation that the main frame water of condensation after recovery waste heat and small turbine vapour condenser 3 produce enters low-pressure heater group 14 after deaerator level control valve group 10.
In system as depicted in figs. 1 and 2, enter the flow control valve 11 that arranges on the water of condensation branch road pipeline of small turbine vapour condenser 3 in order to control the assignment of traffic of cooling water branch road of small turbine vapour condenser 3, thereby make can realize from the assignment of traffic of total condensing water flow 0～100% and regulating as the flow on the water of condensation branch road pipeline of the main frame water of condensation of small turbine vapour condenser 3 cooling waters.And the utility model utilization (main steam turbine) water of condensation replaces the cooling water source of circulating water as induced draught fan small turbine vapour condenser, fully to reclaim small turbine exhausted spare heat, and simplify condensed steam type small turbine system, raising system reliability of operation, reduces condensed steam type small turbine operation maintenance workload.Stop valve 12 is standby valve, in normal off status.In the time of flow control valve 11 fault, come into operation.
Claims (7)
1. one kind drives the condensed steam type small turbine exhaust steam waste heat utilization system of induced draught fan, it is characterized in that: the condensed steam type small turbine (1) that comprises main steam turbine (5) and be connected with induced draught fan (2), the exhaust vent of condensed steam type small turbine (1) is connected with small turbine vapour condenser (3), and the exhaust vent of main steam turbine (5) is connected with main frame vapour condenser (6), condensate pump (7), precision processing device of condensation water (8), shaft sealing cooler (9) and low pressure heat regenerative system successively; The outlet of shaft sealing cooler (9) is also connected with the cooling water inlet of small turbine vapour condenser (3) through water of condensation branch road pipeline, the water of condensation export pipeline of the coolant outlet of small turbine vapour condenser (3) and small turbine vapour condenser (3) meets at coagulation hydroenergy backwater pipeline, and the outlet of coagulation hydroenergy backwater pipeline is connected with low pressure heat regenerative system.
2. the condensed steam type small turbine exhaust steam waste heat utilization system of driving induced draught fan according to claim 1, it is characterized in that: described low pressure heat regenerative system by the backwater point being connected before after low-pressure heater group (13) and backwater point low-pressure heater group (14) form, the outlet of shaft sealing cooler (9) is connected with the entrance of low-pressure heater group (13) before the entrance of water of condensation branch road pipeline and backwater point respectively through deaerator level control valve group (10), the outlet of coagulation hydroenergy backwater pipeline is connected with the entrance of low-pressure heater group (14) after backwater point.
3. the condensed steam type small turbine exhaust steam waste heat utilization system of driving induced draught fan according to claim 1, it is characterized in that: described low pressure heat regenerative system by the final stage low-pressure heater (15) being communicated with successively, inferior final stage low-pressure heater (16) and backwater point after low-pressure heater group (14), and the outlet of shaft sealing cooler (9) is connected with final stage low-pressure heater (15), after the entrance of the outlet of coagulation hydroenergy backwater pipeline and time final stage low-pressure heater (16) or backwater point, the entrance of low-pressure heater group (14) is connected.
4. the condensed steam type small turbine exhaust steam waste heat utilization system of driving induced draught fan according to claim 3, it is characterized in that: after described inferior final stage low-pressure heater (16) and backwater point, between low-pressure heater group (14), be provided with deaerator level control valve group (10), the entrance of deaerator level control valve group (10) is connected with the outlet of coagulation hydroenergy backwater pipeline with the outlet of inferior final stage low-pressure heater (16) respectively.
5. according to the condensed steam type small turbine exhaust steam waste heat utilization system of the driving induced draught fan described in any one claim in claim 1～4, it is characterized in that: described water of condensation branch road pipeline is provided with flow control valve (11).
6. the condensed steam type small turbine exhaust steam waste heat utilization system of driving induced draught fan according to claim 5, is characterized in that: between the entrance and exit of described flow control valve (11), be connected by the spare duct that is provided with stop valve (12).
7. according to the condensed steam type small turbine exhaust steam waste heat utilization system of the driving induced draught fan described in any one claim in claim 1～4, it is characterized in that: the water of condensation export pipeline of described small turbine vapour condenser (3) is provided with the some little condensate pump (4) being connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393297.8U CN204002956U (en) | 2014-07-16 | 2014-07-16 | A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420393297.8U CN204002956U (en) | 2014-07-16 | 2014-07-16 | A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan |
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| CN201420393297.8U Expired - Fee Related CN204002956U (en) | 2014-07-16 | 2014-07-16 | A kind of condensed steam type small turbine exhaust steam waste heat utilization system that drives induced draught fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100314A (en) * | 2014-07-16 | 2014-10-15 | 西安热工研究院有限公司 | Steam discharge waste heat utilization system of condensing type small turbine for driving induced draft fan |
| CN113847824A (en) * | 2021-09-18 | 2021-12-28 | 西安热工研究院有限公司 | System and method for adjusting cooling water amount of independent condenser of small turbine of water feeding pump |
-
2014
- 2014-07-16 CN CN201420393297.8U patent/CN204002956U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100314A (en) * | 2014-07-16 | 2014-10-15 | 西安热工研究院有限公司 | Steam discharge waste heat utilization system of condensing type small turbine for driving induced draft fan |
| CN104100314B (en) * | 2014-07-16 | 2016-03-02 | 西安热工研究院有限公司 | A kind of condensed steam type small steam turbine exhaust steam bootstrap system driving induced draught fan |
| CN113847824A (en) * | 2021-09-18 | 2021-12-28 | 西安热工研究院有限公司 | System and method for adjusting cooling water amount of independent condenser of small turbine of water feeding pump |
| CN113847824B (en) * | 2021-09-18 | 2024-05-07 | 西安热工研究院有限公司 | Method for adjusting cooling water quantity of independent condenser of small turbine suitable for feed pump |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160716 |