CN218494960U - Hydrophobic energy recycling system of garbage power plant - Google Patents
Hydrophobic energy recycling system of garbage power plant Download PDFInfo
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- CN218494960U CN218494960U CN202222296888.0U CN202222296888U CN218494960U CN 218494960 U CN218494960 U CN 218494960U CN 202222296888 U CN202222296888 U CN 202222296888U CN 218494960 U CN218494960 U CN 218494960U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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Abstract
The utility model provides a hydrophobic energy recovery utilizes system of rubbish power plant can effectively recycle potential energy and heat energy that air preheater and steam-gas heater high pressure were hydrophobic. The utility model discloses an air preheater, steam-gas heater and oxygen-eliminating device, its characterized in that: the device also comprises a water turbine, a generator, a drainage heat exchanger, a high-pressure drainage pipeline, a low-pressure drainage pipeline and a rear drainage pipeline; the hydrophobic outlet of the air preheater and/or the steam-flue gas heat exchanger is connected with the hydrophobic inlet of the water turbine through a high-pressure hydrophobic pipeline; the water turbine is connected with a generator; a drain outlet of the water turbine is connected with a drain inlet of the drain heat exchanger through a low-pressure drain pipeline; the drainage outlet of the drainage heat exchanger is connected with the water inlet of the deaerator through a rear drainage pipeline.
Description
Technical Field
The utility model relates to a hydrophobic energy recuperation utilizes system of rubbish power plant.
Background
In recent years, along with the continuous progress of urbanization, the call of the national green energy comprehensive utilization policy is actively responded, and about 550 waste incineration power generation projects are put into operation throughout the country by 2021. Parameters of high-pressure drainage of an air preheater and drainage of a steam/flue gas heat exchanger SGH of the garbage power plant are mainly influenced by parameters of a waste heat boiler. In the operating waste incineration power generation project, the parameters of a waste heat boiler mainly comprise medium-temperature medium-pressure (4.0 MPaG,400 ℃) and medium-temperature medium-pressure (6.4 MPaG,450 ℃). The corresponding high-pressure hydrophobic air preheater and steam-flue gas heat exchanger (SGH) hydrophobic pressure is about 4.8 MPaG to 8.3 MPaG. Due to the temperature of the boiler feed water, the deaerator of the garbage power plant usually adopts a medium-temperature and medium-pressure (0.17MPaG, 130 ℃) deaerator. In order to recover the part of the water drainage of the air preheater and the SGH, the part of the water drainage enters a deaerator after water drainage throttling decompression or water drainage expansion is generally adopted. The two methods are easy to form vapor-liquid two-phase drainage, increase flow resistance, generate vapor-water impact phenomenon, scour the pipe wall, particularly form severe scour at the parts of a tee joint, an elbow and the like, cause pipeline vibration, cause pipeline leakage and influence the safe operation of a system.
In order to better and safely operate and recycle energy, practitioners in the waste incineration power generation industry are always seeking new methods. For example, the Chinese patent with the authorization number of CN 216047715U discloses a drainage regulation control system of an air preheater in the garbage incineration industry, and the invention arranges a set of drainage valve bank and a set of regulation valve bank on a drainage pipeline of the air preheater, and mainly solves the problems of drainage water vapor and drainage quantity regulation. For example, the Chinese patent with the authorization number of CN 215765034U discloses a heating steam drainage system, the invention changes an air preheater from two-section type to four-section type, simultaneously arranges an air preheater drainage tank and a valve regulating group, connects the water discharged by an SGH high-pressure drainage flash tank with a deaerator water balance pipeline, and realizes the recovery of partial drainage energy on the basis of solving the problem of smooth drainage.
The existing high-pressure drainage recovery modes of an air preheater and an SGH mainly adopt throttling and expansion, and no mode capable of simultaneously recovering pressure potential energy and heat energy exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a hydrophobic energy recuperation system of rubbish power plant that structural design is reasonable, can effectively recycle air preheater and steam-gas heater high pressure hydrophobic potential energy and heat energy.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a hydrophobic energy recuperation utilizes system of rubbish power plant, includes air preheater, steam-gas heater and oxygen-eliminating device, its characterized in that: the system also comprises a water turbine, a generator, a drainage heat exchanger, a high-pressure drainage pipeline, a low-pressure drainage pipeline and a rear drainage pipeline; the drain outlet of the air preheater and/or the steam-flue gas heat exchanger is connected with the drain inlet of the water turbine through a high-pressure drain pipeline; the water turbine is connected with a generator; a drainage outlet of the water turbine is connected with a drainage inlet of the drainage heat exchanger through a low-pressure drainage pipeline; the drain outlet of the drain heat exchanger is connected with the water inlet of the deaerator through a back drain pipeline.
The utility model discloses still include low pressure feed water heater and bearing seal heater, hydrophobic heat exchanger's condensate inlet and low pressure feed water heater's condensate outlet connection, low pressure feed water heater's condensate inlet and bearing seal heater's condensate outlet connection.
The condensed water outlet of the hydrophobic heat exchanger is connected with the water inlet of the deaerator.
The utility model is provided with two water turbines, namely a first water turbine and a second water turbine; the two water-repellent heat exchangers are a water-repellent heat exchanger I and a water-repellent heat exchanger II; a drainage outlet of the air preheater is connected with a drainage inlet of the first water turbine through a high-pressure drainage pipeline; a drainage outlet of the water turbine I is connected with a drainage inlet of the drainage heat exchanger I through a low-pressure drainage pipeline; a drainage outlet of the first drainage heat exchanger is connected with a water inlet of the deaerator through a rear drainage pipeline; a drain outlet of the steam-flue gas heat exchanger is connected with a drain inlet of the water turbine II through a high-pressure drain pipeline; a drain outlet of the water turbine II is connected with a drain inlet of the drain heat exchanger II through a low-pressure drain pipeline; a drain outlet of the second drain heat exchanger is connected with a water inlet of the deaerator through a rear drain pipeline, and a condensed water outlet of the second drain heat exchanger is connected with a water inlet of the deaerator; and a condensed water outlet of the first hydrophobic heat exchanger is connected with a condensed water inlet of the second hydrophobic heat exchanger.
Compared with the prior art, the utility model, have following advantage and effect: the system has the advantages of simple structure, convenient improvement on the existing system, convenient popularization and application and wide market prospect. The hydraulic generator is used for recovering the high-pressure hydrophobic pressure potential energy in the garbage power plant, and the purpose of hydrophobic pressure reduction is achieved, and meanwhile, the hydrophobic recovery is facilitated to be directly utilized by the deaerator. According to the hydrophobic temperature condition, the hydrophobic heat exchanger is utilized to enable the condensed water and the hydrophobic water to exchange heat, and the deaerator is ensured and the hydrophobic heat energy is recycled.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Example 1:
the embodiment comprises an air preheater 1, a water turbine 2, a generator 3, a water-repellent heat exchanger 4, a deaerator 5, a low-pressure heater 6, a shaft seal heater 7, a high-pressure water-repellent pipeline 8, a low-pressure water-repellent pipeline 9, a rear water-repellent pipeline 10 and a condensate pipeline 11.
The hydrophobic outlet of the air preheater 1 is connected with the hydrophobic inlet of the water turbine 2 through a high-pressure hydrophobic pipeline 8. The water turbine 2 is connected with a generator 3.
A hydrophobic outlet of the water turbine 2 is connected with a hydrophobic inlet of the hydrophobic heat exchanger 4 through a low-pressure hydrophobic pipeline 9; the hydrophobic outlet of the hydrophobic heat exchanger 4 is connected with the water inlet of the deaerator 5 through the back hydrophobic pipeline 10, and the condensed water outlet of the hydrophobic heat exchanger 4 is connected with the water inlet of the deaerator 5 through the condensed water pipeline 11.
The condensed water inlet of the hydrophobic heat exchanger 4 is connected with the condensed water outlet of the low-pressure heater 6 through a condensed water pipeline 11, and the condensed water inlet of the low-pressure heater 6 is connected with the condensed water outlet of the shaft seal heater 7 through the condensed water pipeline 11.
For example, in a certain garbage power plant, the air preheater 1 has the high-pressure hydrophobic flow rate of 16t/h, the pressure of 7.7MPaG, the temperature of 168 ℃ and no SGH for hydrophobic. The temperature of the high-pressure drain of the air preheater 1 is higher, the high-pressure drain should enter the deaerator 5 after being cooled by the water-repellent heat exchanger 4, and the deaerator 5 has a better deaerating effect. A system as in fig. 1 is used. The high-pressure drainage of the air preheater 1 enters a water turbine 2 to convert pressure potential energy into electric energy, and the low-pressure drainage pressure of an outlet is 1MPa. The low-pressure hydrophobic water passes through a hydrophobic heat exchanger 4, the temperature is reduced to below 130 ℃, and then the low-pressure hydrophobic water enters a deaerator 5. The condensed water enters the condenser, passes through a condensate pump, sequentially passes through a shaft seal heater 7, a low-pressure heater 6 and a water-draining heat exchanger 4, and finally enters a deaerator 5.
Example 2:
the embodiment comprises an air preheater 1, a water turbine 2, a generator 3, a water-repellent heat exchanger 4, a deaerator 5, a low-pressure heater 6, a shaft seal heater 7, a high-pressure water-repellent pipeline 8, a low-pressure water-repellent pipeline 9, a rear water-repellent pipeline 10, a condensed water pipeline 11 and a steam-flue gas heat exchanger 12.
The hydrophobic outlet of the steam-flue gas heat exchanger 12 is connected with the hydrophobic inlet of the water turbine 2 through a high-pressure hydrophobic pipeline 8. The water turbine 2 is connected with a generator 3.
A hydrophobic outlet of the water turbine 2 is connected with a hydrophobic inlet of the hydrophobic heat exchanger 4 through a low-pressure hydrophobic pipeline 9; the hydrophobic outlet of the hydrophobic heat exchanger 4 is connected with the water inlet of the deaerator 5 through the back hydrophobic pipeline 10, and the condensed water outlet of the hydrophobic heat exchanger 4 is connected with the water inlet of the deaerator 5 through the condensed water pipeline 11.
The condensed water inlet of the hydrophobic heat exchanger 4 is connected with the condensed water outlet of the low-pressure heater 6 through a condensed water pipeline 11, and the condensed water inlet of the low-pressure heater 6 is connected with the condensed water outlet of the shaft seal heater 7 through the condensed water pipeline 11.
In this embodiment, two water turbines 2 are provided; the drain inlet of one water turbine 2 is connected with the steam-flue gas heat exchanger 12 through a high-pressure drain pipeline 8; the hydrophobic inlet of the other water turbine 2 is connected with the hydrophobic outlet of the air preheater 1 through a high-pressure hydrophobic pipeline 8, and the hydrophobic outlet is directly connected with the water inlet of the deaerator 5 through a low-pressure hydrophobic pipeline 9.
For example, in a certain garbage power plant, the air preheater 1 is provided with a high-supercooling-degree supercooling section, the high-pressure drainage flow of the air preheater 1 is 25t/h, the pressure is 7.8MPaG, and the temperature is 112 ℃; the high-pressure hydrophobic flow of the steam-flue gas heat exchanger 12 is 12t/h, the pressure is 7.8MPaG, and the temperature is 120 ℃. A system as in figure 2 is used. The high-pressure drainage of the air preheater 1 enters a water turbine 2 to convert pressure potential energy into electric energy, and the low-pressure drainage pressure of an outlet is 1MPa. The high-pressure hydrophobic temperature of the air preheater 1 is low, and the air preheater can directly enter the deaerator 5. The steam-flue gas heat exchanger 12 enters a water turbine 2 for high-pressure drainage to convert pressure potential energy into electric energy, and the outlet low-pressure drainage pressure is 1.7MPa. The steam-flue gas heat exchanger 12 discharges water at low pressure, then the water is drained through the water drainage heat exchanger 4, the temperature is reduced to below 130 ℃, and the water enters the deaerator 5. The condensed water comes to the condenser, passes through the condensate pump, sequentially passes through the shaft seal heater 7, the low-pressure heater 6 and the water-draining heat exchanger 4, and finally enters the deaerator 5.
Example 3:
the embodiment comprises an air preheater 1, a water turbine, a generator 3, a water-draining heat exchanger, a deaerator 5, a low-pressure heater 6, a shaft seal heater 7, a high-pressure water-draining pipeline 8, a low-pressure water-draining pipeline 9, a rear water-draining pipeline 10, a condensed water pipeline 11 and a steam-flue gas heat exchanger 12.
In this embodiment, two water turbines 2 are provided, namely a first water turbine 21 and a second water turbine 22; the water-repellent heat exchanger 4 is provided with two sets, namely a first water-repellent heat exchanger 41 and a second water-repellent heat exchanger 42.
And a hydrophobic outlet of the air preheater 1 is connected with a hydrophobic inlet of the first water turbine 21 through a high-pressure hydrophobic pipeline 8. The first water turbine 21 is connected with a generator 3.
A drainage outlet of the water turbine I21 is connected with a drainage inlet of the drainage heat exchanger I41 through a low-pressure drainage pipeline 9; and a drainage outlet of the first drainage heat exchanger 41 is connected with a water inlet of the deaerator 5 through a rear drainage pipeline 10.
And a condensed water inlet of the first hydrophobic heat exchanger 41 is connected with a condensed water outlet of the low-pressure heater 6 through a condensed water pipeline 11, and a condensed water inlet of the low-pressure heater 6 is connected with a condensed water outlet of the shaft seal heater 7 through the condensed water pipeline 11.
And a hydrophobic outlet of the steam-flue gas heat exchanger 12 is connected with a hydrophobic inlet of the second water turbine 22 through a high-pressure hydrophobic pipeline 8. The second water turbine 22 is connected with a generator 3.
A hydrophobic outlet of the second water turbine 22 is connected with a hydrophobic inlet of the second hydrophobic heat exchanger 42 through a low-pressure hydrophobic pipeline 9; the water drainage outlet of the second water drainage heat exchanger 42 is connected with the water inlet of the deaerator 5 through the rear water drainage pipeline 10, and the condensed water outlet of the second water drainage heat exchanger 42 is connected with the water inlet of the deaerator 5 through the condensed water pipeline 11.
And a condensed water inlet of the first hydrophobic heat exchanger 41 is connected with a condensed water outlet of the low-pressure heater 6 through a condensed water pipeline 11, and a condensed water inlet of the low-pressure heater 6 is connected with a condensed water outlet of the shaft seal heater 7 through the condensed water pipeline 11. The condensed water outlet of the first hydrophobic heat exchanger 41 is connected with the condensed water inlet of the second hydrophobic heat exchanger 42 through the condensed water pipe 11.
In a certain garbage power plant, an air preheater 1 has the high-pressure drainage flow of 15t/h, the pressure of 7.8MPaG and the temperature of 170 ℃; the high-pressure drainage flow of the steam-flue gas heat exchanger 12 is 7t/h, the pressure is 7.8MPaG, and the temperature is 210 ℃. A system as in fig. 3 is used. The high-pressure drainage of the air preheater 1 enters a water turbine I21 to convert pressure potential energy into electric energy, and the low-pressure drainage pressure of an outlet is 1.2MPa. Draining water at low pressure in the air preheater, passing through a first hydrophobic heat exchanger 41, reducing the temperature to below 130 ℃, and then entering a deaerator 5. The steam-flue gas heat exchanger 12 enters a second water turbine 22 for high-pressure drainage, the pressure potential energy is converted into electric energy, and the outlet low-pressure drainage pressure is 2.0MPa. The steam-flue gas heat exchanger 12 conducts low-pressure hydrophobic treatment, then the water passes through a second hydrophobic heat exchanger 42, the temperature is reduced to be below 130 ℃, and then the water enters the deaerator 5. The condensed water enters the condenser, passes through a condensate pump, sequentially passes through a shaft seal heater 7, a low-pressure heater 6, a first water-draining heat exchanger 41 and a second water-draining heat exchanger 42, and finally enters a deaerator 5.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The utility model provides a hydrophobic energy recovery utilizes system of rubbish power plant, includes air preheater, steam-gas heater and oxygen-eliminating device, its characterized in that: the device also comprises a water turbine, a generator, a drainage heat exchanger, a high-pressure drainage pipeline, a low-pressure drainage pipeline and a rear drainage pipeline; the hydrophobic outlet of the air preheater and/or the steam-flue gas heat exchanger is connected with the hydrophobic inlet of the water turbine through a high-pressure hydrophobic pipeline; the water turbine is connected with a generator; a drain outlet of the water turbine is connected with a drain inlet of the drain heat exchanger through a low-pressure drain pipeline; the drainage outlet of the drainage heat exchanger is connected with the water inlet of the deaerator through a rear drainage pipeline.
2. The refuse power plant hydrophobic energy recovery system according to claim 1, characterized in that: the drainage heat exchanger is characterized by further comprising a low-pressure heater and a shaft seal heater, a condensed water inlet of the drainage heat exchanger is connected with a condensed water outlet of the low-pressure heater, and a condensed water inlet of the low-pressure heater is connected with a condensed water outlet of the shaft seal heater.
3. The refuse power plant hydrophobic energy recovery system according to claim 1, characterized in that: and a condensed water outlet of the hydrophobic heat exchanger is connected with a water inlet of the deaerator.
4. The waste power plant hydrophobic energy recovery system of claim 1, wherein: the two water turbines are a first water turbine and a second water turbine; the two water-repellent heat exchangers are a water-repellent heat exchanger I and a water-repellent heat exchanger II; a drainage outlet of the air preheater is connected with a drainage inlet of the first water turbine through a high-pressure drainage pipeline; a drainage outlet of the water turbine I is connected with a drainage inlet of the drainage heat exchanger I through a low-pressure drainage pipeline; a drainage outlet of the first drainage heat exchanger is connected with a water inlet of the deaerator through a rear drainage pipeline; a drain outlet of the steam-flue gas heat exchanger is connected with a drain inlet of the water turbine II through a high-pressure drain pipeline; a drain outlet of the water turbine II is connected with a drain inlet of the drain heat exchanger II through a low-pressure drain pipeline; a drain outlet of the second drain heat exchanger is connected with a water inlet of the deaerator through a rear drain pipeline, and a condensed water outlet of the second drain heat exchanger is connected with a water inlet of the deaerator; and a condensed water outlet of the first hydrophobic heat exchanger is connected with a condensed water inlet of the second hydrophobic heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222296888.0U CN218494960U (en) | 2022-08-31 | 2022-08-31 | Hydrophobic energy recycling system of garbage power plant |
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| CN202222296888.0U CN218494960U (en) | 2022-08-31 | 2022-08-31 | Hydrophobic energy recycling system of garbage power plant |
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| CN218494960U true CN218494960U (en) | 2023-02-17 |
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