CN220380298U

CN220380298U - Intelligent efficient energy-saving power plant circulating water system

Info

Publication number: CN220380298U
Application number: CN202320056618.4U
Authority: CN
Inventors: 李国宾; 王深
Original assignee: Nanjing Gaohe Environment Engineering Co ltd
Current assignee: Nanjing Gaohe Environment Engineering Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2024-01-23
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses an intelligent efficient energy-saving power plant circulating water system, which belongs to the technical field of power generation, and because a heat pipe is adopted as a heat transfer element, and a heated section of the heat pipe element is adopted to strengthen heat transfer by adopting a high-frequency welding spiral fin, the whole device has high heat transfer efficiency, compact equipment and relatively small hot side smoke flow resistance; the heat is transmitted to the water by the flue gas, the water is indirectly heated by the heat pipe element, the flue gas and the water are completely separated, the heat pipe element in the system is relatively independent, the operation of the system is not affected by single or multiple damages, the operation is simple, the maintenance is convenient, the work is reliable, the system is integrated through the optimization, the energy conservation and the reconstruction of the components, the operation of the whole system is intelligent, the operation cost is reduced, the power generation operation time and the power generation efficiency are greatly improved, and the environment is optimized.

Description

Intelligent efficient energy-saving power plant circulating water system

Technical Field

The utility model belongs to the technical field of power generation, and particularly relates to an intelligent efficient energy-saving power plant circulating water system.

Background

The power generation system of small and medium power plants in China generates steam in a boiler through burning fuel or waste heat generated by industry, and the steam is utilized to push a steam turbine to do work for power generation. Most of steam discharged by the steam turbine is condensed into water in the condenser, and the water is sent into the boiler for recycling. The cooling circulating water of the condenser is usually industrial fresh water, underground water, river water and other high-hardness water quality, and the heat exchange performance of the condenser is good or bad, so that the power generation efficiency of the steam turbine is directly determined. The heat losses of the power plant are about: 50.5% of heat loss of steam turbine exhaust, 8% of heat loss of boiler, 0.5% of mechanical loss of steam turbine, 0.5% of power generator loss, 0.5% of heat loss of pipeline, 60% of total heat loss and about 40% of heat efficiency of whole plant. From the above, the heat loss of the power plant is mainly concentrated on the heat loss of the exhaust steam of the steam turbine. The boiler heat loss and the like only occupy a very small proportion, the reduction margin is not large, the main factors are the heat loss of the steam turbine exhaust, and the heat loss occupies about 50% of the total heat loss of the whole plant, so that the potential for improving the heat efficiency is huge.

The existing circulating water system has the following problems: 1. the system is mostly operated manually; 2. the boiler exhaust gas temperature is high; 3. the scaling of the inner wall of the heat exchange tube of the condenser affects the generating efficiency of the unit, and manual cleaning, rubber ball cleaning, ultrasonic cleaning and other methods are commonly used for descaling, but the cleaning methods cannot achieve the effects that the heat exchange tube of the condenser is not scaled and the heat exchange capacity can be improved; 4. the problems of large heat consumption, low water pump efficiency and the like of the cooling tower, the deaerator and the vacuum pump greatly reduce the power generation efficiency of the system, and the intelligent high-efficiency energy-saving power plant circulating water system is invented.

Disclosure of Invention

Aiming at the problems of the existing circulating water system, the utility model provides an intelligent efficient energy-saving circulating water system of a power plant, which comprises a heat pipe economizer, and the components can be matched for use to effectively solve the problems.

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides an intelligent high-efficient energy-saving power plant circulating water system, including steam drum (1), superheater (2), economizer (3), air preheater (4), deaerator (5), feed water pump (6), cold oil ware (7), steam turbine (8), vacuum pump (9), condenser (10), condensate pump (11), air cooler (12), generator (13), first circulating water pump (14), second circulating water pump (15), draught fan (16), cooling tower (17), fan (18) and chimney (19), steam drum (1) have a plurality of outputs and input, an output and the superheater (2) of steam drum (1) are connected, an output and an input of steam drum (1) are connected with downcomer and water-cooling wall respectively, superheater (2), economizer (3), air preheater (4), draught fan (16) all set up inside the flue, the output of economizer (3) is connected with an input of steam drum (1), the high-efficient energy-saving circulating water system (20) is still including a boiler (20) is connected with the input of the economizer (20) of the boiler (5), a water supply pump (6) is arranged between the deaerator (5) and the heat pipe economizer (20), a multi-pipeline valve is arranged at the front end of the water supply pump (6) and is simultaneously input into the economizer (3), an air preheater (4) is arranged between the heat pipe economizer (20) and the economizer (3), and an induced draft fan (16) is arranged at the front end of the heat pipe economizer (20).

Further, the input of deaerator (5) is connected condenser (10), set up condensate pump (11) between condenser (10) and deaerator (5), turbine (8) are connected to the input of condenser (10), set up vacuum pump (9) between turbine (8) and condenser (10). Further, the steam turbine (8) is connected with the oil cooler (7) and the generator (13), the generator (13) is connected with the air cooler (12), the cooling tower (17) is connected with the other output end and the input end of the condenser (10) respectively, the first circulating water pump (14) and the second circulating water pump (15) are arranged between the cooling tower (17) and the condenser (10) respectively, and one end of the cooling tower (17) is connected with the fan (18).

Specifically, the cooling tower (17) is energy-saving modified, the cooling effect is improved, a water source is further saved, and the circulating water pump adopts a novel energy-saving water pump.

Further, the filter screen is modified to be about 6mm in caliber. Further, the deaerator adopts a novel energy-saving efficient deaerator, so that steam loss is reduced, the circulating water pump adopts a novel energy-saving water pump, and the water supply pump adopts a novel energy-saving water pump.

Further, the manual operation of the circulating water system is changed into the intelligent operation of DCS centralized control.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that: (1) In the utility model, the heat pipe is adopted as the heat transfer element, and the heated section of the heat pipe element adopts the high-frequency welding spiral fins to strengthen the heat transfer, so the whole device has high heat transfer efficiency, compact equipment and relatively smaller hot side smoke flow resistance; the heat quantity is transmitted to water by flue gas, the water is completely completed by a heat pipe element, the water is indirectly heated, the flue gas and the water are completely separated, the heat pipe element in the system is relatively independent, single or multiple heat pipe elements are damaged, the operation of the system is not affected, the operation is simple, the maintenance is convenient, the work is reliable, no external power is needed in the heat conveying process of the whole system, the failure rate is low, the efficiency is high, the radial heat pipe can effectively control the wall temperature, and the wall temperature can be better improved and dew point corrosion is prevented because the area of the heat pipe is far larger than that of the cold side; the heat pipe economizer recovers the waste heat of the flue gas and has the characteristics of small device volume, simple structure, stable operation, safety, reliability and the like.

(2) In the utility model, the inner wall of the heat exchange tube of the condenser is changed into an automatic descaling heat exchange system to realize (1) intensified heat: the heat exchange effect of the water side of the heat exchange tube of the condenser is enhanced, and the heat exchange efficiency is improved by about 20%. End difference is reduced, and vacuum is improved; (2) automatic descaling: the on-line cleaning of the condenser is realized, the long-term clean and scale-free heat exchange tube is maintained, and the continuous operation period of the equipment is prolonged; (3) The scale corrosion is reduced, and the service life of the heat exchange tube of the condenser is prolonged; (4) The steam consumption is reduced, the water supplementing quantity is reduced, and the dosage can be moderately reduced according to the specific condition of the circulating water system.

(3) In the utility model, the power plant circulating water adopts a DCS control system to realize the functions of displaying, controlling, alarming, interlocking and the like of main process parameters of a production device and supporting facilities; the operator station is used for human-machine interface and process window, and the process detection control station is used for data acquisition, data processing and process control output of various transmitters on site and state information from the running of MCC motor. And an operator in a control room intervenes in the production process by keyboard or mouse operation, so that centralized detection, process control and operation management of main process parameters of the device are realized.

Drawings

FIG. 1 is a schematic diagram of a circulating water system of a conventional high-efficiency energy-saving power plant;

FIG. 2 is a schematic diagram of a circulating water system of a high-efficiency energy-saving power plant in the utility model;

the correspondence between the reference numerals and the component names in the drawings is as follows: 1. A steam drum; 2. a superheater; 3. an economizer; 4. an air preheater; 5. a deaerator; 6. a water feed pump; 7. an oil cooler; 8. A steam turbine; 9. a vacuum pump; 10. a condenser; 11. a condensate pump; 12. an air cooler; 13. a generator; 14. a first circulating water pump; 15. a second circulating water pump; 16. an induced draft fan; 17. a cooling tower; 18. a blower; 19. a chimney; 20. a heat pipe coal economizer.

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.

1-2, which are schematic diagrams of an intelligent efficient energy-saving power plant circulating water system according to a preferred embodiment of the present utility model, the intelligent efficient energy-saving power plant circulating water system is characterized in that: the system comprises a steam drum 1, a superheater 2, an economizer 3, an air preheater 4, a deaerator 5, a water supply pump 6, a cold oil device 7, a steam turbine 8, a vacuum pump 9, a condenser 10, a condensate pump 11, an air cooler 12, a generator 13, a first circulating water pump 14, a second circulating water pump 15, an induced draft fan 16, a cooling tower 17, a fan 18 and a chimney 19, wherein the steam drum 1 is provided with a plurality of output ends and input ends, one output end and one input end of the steam drum 1 are respectively connected with a downcomer and a water cooling wall, the superheater 2, the economizer 3, the air preheater 4 and the induced draft fan 16 are all arranged in a flue, the output end of the economizer 3 is connected with one input end of the steam drum 1, the output end of the intelligent high-efficiency energy-saving power plant circulating water system further comprises a heat pipe economizer 20 arranged in the flue, the output end of the heat pipe economizer 20 is connected with the economizer 3, one output end and one input end of the deaerator 20 is connected with the superheater 2, one input end of the heat pipe economizer 20 is respectively connected with a downcomer and one input end of the water-cooling wall, the boiler 5 is connected with the boiler 6, and the water-saving pump 20 is arranged between the boiler 3 and the water supply pump 4 and the water supply pump 20 is arranged in the flue, and the water supply pump 3 is arranged between the boiler 3 and the water supply pump 4.

Specifically, the heating and circulation of the water heating system is completely separated from the heat source due to the existence of the heat pipe and independently exists outside the air channel of the hot fluid, so that the water is heated without direct scouring of the hot fluid.

Further, electric drive in the circulating water system is changed into hydraulic drive, a speed reducer and a motor of an original cooling tower are removed, a water turbine is installed at an original position, and the novel non-floating water collector and the big three-splashing spray head are adopted.

Specifically, the water turbine driving energy mainly utilizes the surplus energy of the water pump without additionally increasing motor driving, so that the purposes of energy conservation and noise reduction are achieved.

The technology can be utilized to carry out energy-saving reconstruction on the cooling tower with the fan motor, a novel water collector without floating is adopted to reduce the loss of circulating water, and a big three-splashing spray head is adopted to fully atomize the circulating water and improve the cooling effect; the original cooling tower filler, steel skeleton, panel and air duct are utilized. Working principle: because the heat pipe is adopted as the heat transfer element, and the heated section of the heat pipe element adopts the high-frequency welding spiral fins to strengthen the heat transfer, the whole device has high heat transfer efficiency, compact equipment and relatively small hot side smoke flow resistance; the heat is transmitted to the water by the flue gas, the water is indirectly heated, the flue gas and the water are completely separated, the heat pipe elements in the system are relatively independent, single or multiple damages do not affect the operation of the system, the operation is simple, the maintenance is convenient, the work is reliable, no external power is needed in the heat quantity transmission process of the whole system, the failure rate is low, the efficiency is high, the radial heat pipe can more effectively control the wall temperature, and the wall temperature can be better improved and dew point corrosion is prevented because the area of the heat pipe is far larger than that of the cold side; the heat pipe economizer 8 recovers the waste heat of the flue gas and has the characteristics of small device volume, simple structure, stable operation, safety, reliability and the like.

As shown in fig. 2, which is a schematic diagram of an intelligent efficient energy-saving power plant circulating water system according to another preferred embodiment of the present utility model, an input end of the deaerator 5 is connected with a condenser 10, a condensate pump 11 is disposed between the condenser 10 and the deaerator 5, an input end of the condenser 10 is connected with a steam turbine 8, and a vacuum pump 9 is disposed between the steam turbine 8 and the condenser 10. Further, the steam turbine 8 is connected with the oil cooler 7 and the generator 13, the generator 13 is connected with the air cooler 12, the other output end and the input end of the condenser 10 are respectively connected with the cooling tower 17, a first circulating water pump 14 and a second circulating water pump 15 are respectively arranged between the cooling tower 17 and the condenser 10, and one end of the cooling tower 17 is connected with the fan 18.

Specifically, the cooling tower 17 is energy-saving modified, the cooling effect is improved, the water source is saved, and the circulating water pump is a novel energy-saving water pump.

Further, the filter screen is modified to be about 6mm in caliber.

Further, the deaerator adopts a novel energy-saving efficient deaerator, so that steam loss is reduced, the circulating water pump adopts a novel energy-saving water pump, and the water supply pump adopts a novel energy-saving water pump.

Working principle: in the utility model, the inner wall of the heat exchange tube of the condenser is changed into an automatic descaling heat exchange system to realize 1 intensified heat generation: the heat exchange effect of the water side of the heat exchange tube of the condenser is enhanced, and the heat exchange efficiency is improved by about 20%. End difference is reduced, and vacuum is improved; 2. automatic descaling: the on-line cleaning of the condenser is realized, the long-term clean and scale-free heat exchange tube is maintained, and the continuous operation period of the equipment is prolonged; 3. the corrosion under scale is slowed down, and the service life of the heat exchange tube of the condenser is prolonged; 4. the steam consumption and the water supplementing quantity are reduced, the dosage can be moderately reduced according to the specific condition of the circulating water system, and the circulating water of the power plant adopts a DCS control system to realize the functions of displaying, controlling, alarming, interlocking and the like of main process parameters of the production device and the matched facilities; the operator station is used for human-machine interface and process window, and the process detection control station is used for data acquisition, data processing and process control output of various transmitters on site and state information from the running of MCC motor.

And an operator in a control room intervenes in the production process by keyboard or mouse operation, so that the main process parameters of the device are intensively detected, process control and operation management are realized.

While the utility model has been described in detail in connection with specific embodiments thereof, it should be understood that the utility model is not limited to those precise embodiments, and that various simple deductions or substitutions may be made by one skilled in the art without departing from the spirit of the utility model, which is to be construed as falling within the scope of the utility model defined by the appended claims.

Claims

1. The intelligent efficient energy-saving power plant circulating water system is characterized by comprising a steam drum (1), a superheater (2), an economizer (3), an air preheater (4), a deaerator (5), a water supply pump (6), a cold oil device (7), a steam turbine (8), a vacuum pump (9), a condenser (10), a condensate pump (11), an air cooler (12), a generator (13), a first circulating water pump (14), a second circulating water pump (15), an induced draft fan (16), a cooling tower (17), a fan (18) and a chimney (19), wherein the steam drum (1) is provided with a plurality of output ends and input ends, one output end and one input end of the steam drum (1) are respectively connected with a down pipe and a water cooling wall, the superheater (2), the economizer (3), the air preheater (4) and the induced draft fan (16) are all arranged inside a flue, the output end of the economizer (3) is connected with one input end of the steam drum (1), one output end of the intelligent energy-saving circulating water system is further connected with one input end of the boiler (20) of the power plant (20), a water supply pump (6) is arranged between the deaerator (5) and the heat pipe economizer (20), a multi-pipeline valve is arranged at the front end of the water supply pump (6) and is simultaneously input into the economizer (3), an air preheater (4) is arranged between the heat pipe economizer (20) and the economizer (3), and an induced draft fan (16) is arranged at the front end of the heat pipe economizer (20).

2. The intelligent efficient energy-saving power plant circulating water system according to claim 1, wherein the input end of the deaerator (5) is connected with a condenser (10), a condensate pump (11) is arranged between the condenser (10) and the deaerator (5), the input end of the condenser (10) is connected with a steam turbine (8), and a vacuum pump (9) is arranged between the steam turbine (8) and the condenser (10).

3. The intelligent efficient energy-saving power plant circulating water system according to claim 1, wherein the steam turbine (8) is connected with the oil cooler (7) and the generator (13), the generator (13) is connected with the air cooler (12), the other output end and the input end of the condenser (10) are respectively connected with the cooling tower (17), a first circulating water pump (14) and a second circulating water pump (15) are respectively arranged between the cooling tower (17) and the condenser (10), and one end of the cooling tower (17) is connected with the fan (18).

4. The intelligent efficient energy-saving power plant circulating water system according to claim 3, wherein the circulating water pump is a novel energy-saving water pump.

5. The intelligent efficient energy-saving power plant circulating water system according to claim 1, wherein the deaerator (5) is a novel energy-saving efficient deaerator, steam loss is reduced, the circulating water pump is a novel energy-saving water pump, and the water supply pump is a novel energy-saving water pump.