CN221237985U - Wind-water coupling type closed water waste heat recovery system - Google Patents
Wind-water coupling type closed water waste heat recovery system Download PDFInfo
- Publication number
- CN221237985U CN221237985U CN202322887166.7U CN202322887166U CN221237985U CN 221237985 U CN221237985 U CN 221237985U CN 202322887166 U CN202322887166 U CN 202322887166U CN 221237985 U CN221237985 U CN 221237985U
- Authority
- CN
- China
- Prior art keywords
- air
- closed
- closed water
- water
- heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 239000002918 waste heat Substances 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 239000000498 cooling water Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Abstract
The utility model provides a wind-water coupling type closed water waste heat recovery system, includes closed water return main pipe pipeline and closed water supply main pipe pipeline, is provided with two at least cooling user in parallel between closed water return main pipe pipeline and closed water supply main pipe pipeline, closed circulation cooling water pump and the closed water booster pump for the heater, and wherein, closed circulation cooling water pump connects closed circulation cooling water heat exchanger, and the closed water booster pump for the heater is connected one, overgrate air heater. The utility model adopts the cold air cooling closed water system, the primary closed water pump can be used as spare capacity, and the heat of the recovered closed water system is coupled with the primary air system and the secondary air system of the boiler, so that the safe and reliable operation of the closed water system can be realized, the heat can be recovered, and the efficiency of the boiler can be improved; the working conditions of machine unit shutdown turning and startup warming-up can adopt pressurized cold air to cool the turbine lubricating oil system.
Description
Technical Field
The utility model relates to a wind-water coupling type closed water waste heat recovery system which can be widely applied to the optimization design and shape selection of closed water systems in coal-fired power generation projects, is also applicable to closed water systems adopted by units such as gas power stations, garbage power generation, biomass power generation and the like, and is used for improving the running efficiency of the closed water systems of the units and recovering the waste heat of auxiliary machines of the units to improve the boiler efficiency.
Background
In a thermal power plant, a closed water system provides cooling water with qualified pressure, temperature, flow and quality for auxiliary mechanical equipment of a steam turbine and a boiler under various operation conditions, when the closed water system is designed, the closed water pump is generally configured according to 2 100% capacity, the single pump is required to run to meet the requirements of summer conditions, namely, the model selection principle of the closed water pump is high flow and high lift, however, in the actual power plant operation process, due to the difference of seasonal temperature difference, besides the high temperature in summer, the environment temperature is lower, the corresponding closed water flow is far smaller than the design flow, a large amount of throttling loss exists when the closed water pump is operated, the energy loss is larger, the closed water system also needs to maintain cooling of the turbine lubricating oil system during unit outage, the closed water system needs to continuously throttle and operate, a large amount of electric energy is consumed, obviously, the capacity of the closed water system does not reach the design requirement, the motor efficiency is lower than the design value, the water pump flow is lower than the design value, the water pump efficiency is lower than the actual value, and the water pump efficiency is lower than the actual value, so that the closed water pump has the problems of economy and safety at the same time.
Disclosure of utility model
The utility model aims to solve the technical problems that: in order to solve the problem that the design and operation of the closed water system are uneconomical, the waste heat of the closed water system is comprehensively utilized, the heat economy characteristic is improved, and meanwhile, the problems that the closed cooling capacity is not matched, the adjustment is difficult and the energy consumption is large in the shutdown turning and starting warm-up stages are also considered, the wind-water coupling type closed water waste heat recovery energy-saving system is provided.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
The utility model provides a wind-water coupling type closed water waste heat recovery system, includes closed water return main pipe pipeline and closed water supply main pipe pipeline, is provided with two at least cooling user in parallel between closed water return main pipe pipeline and closed water supply main pipe pipeline, closed circulation cooling water pump and the closed water booster pump for the heater, and wherein, closed circulation cooling water pump connects closed circulation cooling water heat exchanger, and the closed water booster pump for the heater is connected one, overgrate air heater.
The closed water booster pump for the air heater is connected with the rear regulating valve of the closed water booster pump for the air heater.
1. The cooling of the secondary air heater adopts a double-way switchable air source, which is respectively a booster fan rear electric air door and a primary air and secondary air incoming electric air door which are connected in parallel, wherein the booster fan rear electric air door is also connected with the booster fan, and the air incoming by the air enters the primary air heater and the secondary air heater through the booster fan and the booster fan rear electric air door; 1. the secondary air from the outlet of the secondary air blower passes through the electric air door of the primary air and the secondary air to directly enter the primary air and the secondary air heater.
1. The air outlet end of the secondary air heater is respectively arranged to an electric air door of the primary air system and an electric air door for exhausting the atmosphere.
Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a wind-water coupling type closed water waste heat recovery energy-saving system, which fully exerts the heat exchange capability of a closed water pump and a heat exchanger by utilizing an original closed water system under the normal operation working condition in summer and operates efficiently; the closed water waste heat recovery energy-saving system provided by the utility model is utilized under the working condition of normal operation in non-summer, the cold air is adopted to cool the closed water system, the primary closed water pump can be used as spare capacity, and the heat of the recovered closed water system is coupled with the primary air system and the secondary air system of the boiler, so that the safe and reliable operation of the closed water system can be realized, the heat can be recovered, and the efficiency of the boiler is improved; the working conditions of machine unit shutdown turning and startup warming-up can adopt pressurized cold air to cool the turbine lubricating oil system. In summary, the system provided by the utility model can effectively solve the problem that the design and operation of the closed water system are uneconomical, can comprehensively utilize the residual heat of the closed water system, improves the heat economy characteristic, can also solve the problems of unmatched closed cooling capacity, difficult adjustment and large energy consumption in the shutdown turning and starting warm-up stages, has larger energy saving and consumption reduction space, can provide references and references for auxiliary machine energy conservation of the same type of power plants, and has wide popularization and application prospects.
Drawings
Fig. 1 is an overall schematic of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 1, the wind-water coupling type closed water waste heat recovery system comprises a closed water return main pipe pipeline 16 and a closed water supply main pipe pipeline 17, at least two cooling users, a closed circulating cooling water pump 1 and a closed water booster pump 6 for a heater are arranged in parallel between the closed water return main pipe pipeline 16 and the closed water supply main pipe pipeline 17, wherein the closed circulating cooling water pump 1 is connected with a closed circulating cooling water heat exchanger 2, and the closed water booster pump 6 for the heater is connected with a primary air heater and a secondary air heater 7. In this way, the closed water booster pump 6 for the air heater is arranged in the closed water system and is connected with the closed circulating cooling water pump 1 in parallel, the closed water waste heat is recovered by the air heater, primary air and secondary air are heated, the boiler efficiency is improved, the low-flow and low-efficiency operation of the closed water pump under non-summer working conditions is reduced, and the thermal economy and reliability of unit operation are improved.
In the present utility model, the cooling users include three, namely, a first cooling user 3, a second cooling user 4, and a third cooling user 5.
Further, the closed circulating cooling water pump 1 is also connected with a closed water pump outlet regulating valve 15.
Further, the closed water booster pump 6 for the air heater is connected with a closed water booster pump rear regulating valve 10 for the air heater. In order to reduce the problem that design parameters of the closed circulation cooling water pump 1 and the closed circulation cooling water heat exchanger 2 are not matched with the cooling capacity of closed water operation, and improve the operation economy of the system, a set of closed water cooling loop is additionally arranged between a closed water return main pipe pipeline 16 and a closed water supply main pipe pipeline 17, and the closed water cooling loop is mainly provided with a closed water booster pump 6 for a heater, a closed water booster pump rear regulating valve 10 for the heater and a primary and secondary air heater 7. The closed water booster pump 6 for the air heater is designed and selected according to the maximum flow and lift in the three working conditions of starting warm-up, stopping turning and winter working conditions, a certain margin is reserved, and the newly added parallel loop is ensured to meet the requirements of starting warm-up, stopping turning and closed water flow and lift in winter working conditions; the closed water booster pump rear regulating valve 10 for the air heater can also be replaced by an electric isolation valve with position feedback, and the improvement based on the electric isolation valve belongs to the protection scope of the utility model, and the function of the electric isolation valve is to regulate the flow of cooling water entering the primary air heater 7 and the secondary air heater 7 according to the requirements of a closed system.
Further, in order to ensure continuous supply of cooling air under all working conditions from the starting to the stopping of the unit, the air inlet ends of the first and second air heaters 7 are connected with two-way switchable air sources, namely a booster fan rear electric air door 13 and a first and second air incoming electric air door 14 which are connected in parallel, wherein the booster fan rear electric air door 13 is also connected with a booster fan 8, and after air incoming by the air, the air enters the first and second air heaters 7 through the booster fan 8 and the booster fan rear electric air door 13; 1. the secondary air from the outlet of the secondary air blower passes through the primary air and secondary air from the electric air door 14 and directly enters the primary air and secondary air heater. Thus, two paths of cold air systems are formed, the two paths of cold air systems can be flexibly configured according to engineering investment, no items are needed, and the combination or improvement based on the two paths of cold air systems belongs to the protection scope of the utility model.
Further, the air outlet ends of the primary air heater 7 and the secondary air heater 7 are respectively arranged to the primary air valve 11 and the secondary air valve 12 for air exhaust, so that the air can be directly introduced into a secondary air system through the primary air valve 11 and the secondary air valve 11 respectively according to selection, and can be directly exhausted to the atmosphere through the air exhaust electric valve 12.
It should be noted that, in normal operation of the present utility model, the closed water return main pipe 16 is connected with the closed water expansion tank 9.
The working principle and the working process of the utility model are as follows:
The wind-water coupling type closed water waste heat recovery energy-saving system provided by the utility model mainly illustrates the working principle and the working process from the following three aspects:
1) Operating conditions in summer
In a closed water system, a general closed circulating cooling water pump 1 is configured according to two 100% capacities, one pump is used for one operation, and the single pump is required to run to meet the requirements of working conditions in summer, so that the temperature of the closed water system is reduced by adopting the closed circulating cooling water pump 1 and a closed circulating cooling water heat exchanger 2 in summer, the two closed circulating cooling water pumps 1 and the closed circulating cooling water heat exchanger 2 can be considered to run simultaneously to cool main and auxiliary equipment of a steam turbine in extreme high temperature in summer, and in addition, a closed water pump outlet is provided with a closed water pump outlet regulating valve, so that the closed flow can be regulated. Because the ambient temperature is higher in summer, the closed water system cannot be effectively cooled by the air cooling system, and therefore, the newly-added air cooling loop is in a shutdown state.
2) Operating conditions in winter
The environmental temperature is lower in winter, and the closed water system can be cooled through a newly-added air cooling loop. Because the closed water booster pump 6 for the air heater is designed and selected according to the maximum flow and lift in the three working conditions of starting warm-up, stopping turning and winter working conditions, the closed circulating cooling water pump 1 can be stopped under the winter working conditions, and the closed water system is cooled by adopting cold air. At the moment, the closed water side is opened by the closed water booster pump 6 for the air heater, and the rear regulating valve 10 of the closed water booster pump for the air heater participates in regulation according to the closed water flow, so that the closed water balance of the water side is ensured; when the first air system and the second air system of the boiler are not put into operation, cold air of the air heater 7 can directly suck cold air through the booster fan 8 to cool closed water, hot air passing through the air heater can directly exhaust the air, and at the moment, the electric air door 12 for exhausting the air and the electric air door 13 for adjusting after the booster fan are opened and participated in the adjustment until the electric air door 11 of the first air system and the electric air door 14 for exhausting the secondary air are in a closed state; when the first and second air systems of the boiler are operated, a pressurizing fan can be adopted to pump cold air according to the needs, or one path of cold air can be led to enter the air heater from the outlets of the first and second air systems to cool closed water, heated hot air is sent to the first and second air systems of the boiler, the residual heat of the closed water is recovered, the boiler efficiency is improved, at the moment, the electric air door 11 of the first and second air systems is opened, the electric air door 12 for air exhaust is closed, and the electric air door 13 behind the pressurizing fan and the electric air door 14 for the first and second air are opened in a single path according to the operation characteristics.
3) Starting warm-up and stopping turning operation
During the starting warm-up and stopping turning of the unit, the temperature of the turbine cylinder is higher, and the turning system must be maintained to run, so that the turbine top shaft oil system, the lubricating oil system and the sealing oil system cannot be stopped, at this time, a user of the closed water system only brings heat in the turbine for the turbine lubricating oil system, and heat generated by running of each oil system, and only a small part of closed water flow is needed for taking away the heat, therefore, if the closed circulating cooling water pump 1 and the closed circulating cooling water heat exchanger 2 are adopted, a large amount of throttling loss exists, and a large amount of electric energy is consumed. Therefore, the closed circulating cooling water pump 1 can be turned off under the working conditions of starting warm-up and stopping of the turning machine, the closed water system is cooled by adopting cold air, namely, the closed water booster pump 6 for the air heater is started, the rear regulating valve 10 for the closed water booster pump for the air heater participates in regulation according to closed water flow, cold air of the primary air heater 7 and the secondary air heater can directly suck the cold air to cool the closed water through the booster fan 8, hot air passing through the air heater can be directly discharged to the atmosphere, and the electric air door 12 for the air discharge and the electric air door 13 for the booster fan are started and participate in regulation.
The utility model is suitable for optimizing the design and the selection of the closed water system or the open water system in the power generation project, can realize the safe and reliable operation of the closed water system, can recycle heat and improve the efficiency of the boiler; the machine set is stopped, started and warmed up and working conditions in winter, the main machine system and the auxiliary machine system can be cooled by adopting cold air, the problem that the design and operation of the closed water system are uneconomical is effectively solved, the waste heat of the closed water system can be comprehensively utilized, the heat economy characteristic is improved, the problems that the closed cooling capacity is not matched, the adjustment is difficult and the energy consumption is large in the stopping and warming up stage can be solved, and the energy saving and consumption reduction space is large.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several changes and modifications can be made without departing from the general inventive concept, and these should also be regarded as the scope of the utility model.
Claims (4)
1. A wind-water coupling type closed water waste heat recovery system is characterized in that: the water heating device comprises a closed water return main pipe pipeline (16) and a closed water supply main pipe pipeline (17), wherein at least two cooling users, a closed circulating cooling water pump (1) and a closed water booster pump (6) for a heater are arranged in parallel between the closed water return main pipe pipeline (16) and the closed water supply main pipe pipeline (17), the closed circulating cooling water pump (1) is connected with a closed circulating cooling water heat exchanger (2), and the closed water booster pump (6) for the heater is connected with a primary air heater (7).
2. The wind-water coupled closed water waste heat recovery system according to claim 1, wherein: the closed water booster pump (6) for the air heater is connected with a rear regulating valve (10) of the closed water booster pump for the air heater.
3. The wind-water coupled closed water waste heat recovery system according to claim 1, wherein: 1. the cooling of the secondary air heater (7) adopts a double-way switchable air source, namely a booster fan rear electric air door (13) and a primary air and secondary air incoming electric air door (14) which are connected in parallel, wherein the booster fan rear electric air door (13) is also connected with a booster fan (8), and the air enters the primary air heater and the secondary air heater (7) through the booster fan (8) and the booster fan rear electric air door (13) after entering the air from the air; 1. the secondary air from the outlet of the secondary air blower directly enters the primary and secondary air heater (7) through the primary and secondary air from the electric air door (14).
4. The wind-water coupled closed water waste heat recovery system according to claim 1, wherein: 1. the air outlet end of the secondary air heater (7) is respectively arranged on an electric air door (11) of the primary air system and an electric air door (12) for exhausting the air.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221237985U true CN221237985U (en) | 2024-06-28 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109322716B (en) | Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method | |
| CN110793011A (en) | Two-stage steam extraction type medium-temperature and medium-pressure waste incineration power generation system and use method thereof | |
| CN203603989U (en) | Combined heating and power system with waste heat recycling function | |
| CN110553301B (en) | Heat supply method and system for air cooling unit | |
| CN109751652B (en) | High back pressure and heat pump combined heat supply system of 300MW and above grade wet cooling unit | |
| CN210714796U (en) | Back-pressure small steam turbine heat-regeneration steam extraction system | |
| CN221237985U (en) | Wind-water coupling type closed water waste heat recovery system | |
| CN111366004A (en) | Flue gas waste heat recycling system and intelligent control method | |
| CN220365632U (en) | Thermal power peak regulation economizer system based on leading regulation level little steam turbine | |
| CN211975086U (en) | Power plant system | |
| CN210220144U (en) | Exhaust heat exchange system of internal combustion engine power generation plant | |
| CN204757075U (en) | Wide load of little steam turbine of backpressure formula drive draught fan supplies heat energy -saving system | |
| CN114635797A (en) | Control system for inlet air temperature of gas turbine | |
| CN212132387U (en) | Two-stage steam extraction type medium-temperature and medium-pressure waste incineration power generation system | |
| CN209840253U (en) | Heat pump system for power plant waste heat cold and hot coupling utilization | |
| CN210663026U (en) | Novel heating system | |
| CN113587176A (en) | Clean heat supply system with steam extraction coupling solar energy of thermoelectric unit and operation method | |
| CN110700908A (en) | Condensing and back pressure switchable steam turbine power generation system and using method thereof | |
| CN218721825U (en) | High back pressure heating system | |
| CN211782825U (en) | Flue gas waste heat recycling system | |
| CN211314298U (en) | Condensing and backpressure switchable steam turbine power generation system | |
| CN109737473B (en) | Waste heat recovery system and process of back pressure type heat supply unit | |
| CN218495000U (en) | Biogas incineration heating and refrigerating system in waste incineration disposal power station | |
| CN213777865U (en) | Efficient different-vacuum series waste heat recovery control system | |
| CN214944463U (en) | Steam turbine backheating drainage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |