CN210197273U - Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating - Google Patents
Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating Download PDFInfo
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- CN210197273U CN210197273U CN201920429124.XU CN201920429124U CN210197273U CN 210197273 U CN210197273 U CN 210197273U CN 201920429124 U CN201920429124 U CN 201920429124U CN 210197273 U CN210197273 U CN 210197273U
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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
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Abstract
The utility model relates to a thereby improve steam reheating system of energy utilization efficiency through improving waste incinerator steam parameter is the domestic waste incineration exhaust-heat boiler steam reheating system who adopts main steam heating, including main component parts such as exhaust-heat boiler, over heater, steam reheater, catch water, steam turbine high pressure cylinder and low pressure jar, condenser, oxygen-eliminating device, feed pump. The main steam of the boiler enters a high-pressure cylinder of the steam turbine and a steam reheater in two paths respectively. The main steam enters a steam-water separator after acting in a high-pressure cylinder of the steam turbine, the separated water enters a deaerator, the steam enters a steam reheater and exchanges heat with the other path of main steam, and the reheated superheated steam is introduced into a low-pressure cylinder of the steam turbine to act. The system not only improves the energy utilization efficiency of the waste incinerator, but also avoids the corrosion of a steam reheating pipeline, and improves the equipment stability and the economic benefit of the waste incineration plant.
Description
Technical Field
The utility model relates to a high steam parameter domestic waste burns power generation system is a steam turbine high pressure cylinder steam extraction after the steam-water separation, gets into the system of steam turbine low pressure cylinder acting after by the main steam heating in the steam reheater again, improves waste incinerator's energy utilization efficiency, reduces high steam parameter waste incinerator high temperature corrosion's harm simultaneously.
Background
The incineration of the domestic garbage can make the urban domestic garbage harmless, quantitative-reduction and resource-utilization, and is an optimal scheme for solving the problem of the city surrounded by the garbage, so that the domestic garbage incineration is widely adopted. In China, domestic waste treatment subsidies and electricity sales are important income sources of waste incineration plants, and with the increasing degree of marketization of the industry, the waste treatment subsidies from governments are less and less, and the waste incineration plants are more and more dependent on the income of electricity sales, so that the improvement of the power generation efficiency is the primary task of a plurality of waste incineration plants.
The household garbage incinerator usually adopts main steam with the parameters of 400 ℃ and 4MPa to generate electricity, but the steam parameters limit the energy utilization efficiency of the garbage incinerator. The power generation efficiency of the garbage incinerator adopting the parameters is generally 23%. In order to improve the power generation efficiency of the waste incinerator, in recent years, more and more waste incinerators increase the steam parameters to 450-485 ℃ and increase the steam pressure to improve the power generation efficiency by increasing the heat exchange ratio of the superheater in the boiler. However, due to the limitations of objective conditions such as high-temperature corrosion of the boiler, the requirement of dryness of the end blade of the steam turbine and the like, if the traditional mode is continuously adopted, the steam parameters cannot be further improved, so that the mode of reheating the steam can be adopted, and the overall thermal efficiency of the incineration plant can be improved under the condition of not increasing the steam temperature.
SUMMERY OF THE UTILITY MODEL
In order to further improve waste incinerator's generating efficiency, the utility model discloses synthesize and adopted steam turbine height, low pressure jar, reheat steam-water separation, the middle reheat of outer steam of stove, modes such as main steam heating, improved the energy utilization efficiency of msw incineration rate, reduced the high temperature corrosion of boiler and the dryness fraction restriction of steam turbine last stage blade.
The utility model provides a technical scheme that its technical problem adopted is: a steam reheating system of a household garbage incineration waste heat boiler adopting main steam for heating is characterized in that the main steam of the boiler enters a steam turbine high-pressure cylinder and a steam reheater in two paths respectively. The steam enters a steam-water separator after acting in a high-pressure cylinder of the steam turbine, main steam enters the steam-water separator after acting in the high-pressure cylinder of the steam turbine, separated saturated water enters a deaerator, the saturated steam enters a steam reheater to exchange heat with the other path of main steam, and reheated superheated steam is introduced into a low-pressure cylinder of the steam turbine to act. The heat source of the steam reheater is the boiler main steam from the superheater.
Further, in the exhaust-heat boiler 1, heat generated by waste incineration is absorbed by water through a heat exchanger; the saturated steam from the steam drum 2 absorbs more energy in the superheater 12 and becomes the main steam of the system with high temperature and high pressure; the main steam from the superheater 12 enters a steam turbine high-pressure cylinder 5 and a steam reheater 4 in two paths respectively; the main steam enters a steam-water separator 10 after acting in a steam turbine high-pressure cylinder 5; the steam-water separator 10 separates saturated water from saturated steam, wherein the saturated steam enters the steam reheater 4 to exchange heat with main steam from the superheater 12, and enters the steam turbine low-pressure cylinder 6 to expand to work and generate power after being heated to superheated steam; saturated water obtained by the separation of the steam-water separator 10 enters a deaerator 9; the exhaust steam of the turbine low pressure cylinder 6 enters a condenser 8 for condensation; the saturated water obtained by the condenser 8 then enters the steam drum 2 through the deaerator 9, the water feed pump 11, the economizer 3 and the like, and the next steam-water circulation process is started.
Further, the steam reheater 4 is a shell-and-tube heater, the main steam from the superheater 12 flows through the tube side of the steam reheater 4 as a heating medium, and the return steam from the outlet of the high-pressure steam turbine cylinder 5 flows through the shell side to be heated.
Further, a steam-water separator 10 is adopted to separate the two-phase components of the steam and the water of the steam discharged by the high-pressure cylinder 5 of the steam turbine.
Furthermore, a high-pressure cylinder 5 and a low-pressure cylinder 6 of the steam turbine are adopted, and exhaust steam of the high-pressure cylinder 5 is heated and then used as inlet steam of the low-pressure cylinder 6.
Further, the pressure of reheat steam from the steam reheater is not lower than 1.4MPa, and the temperature is not lower than 320 ℃.
Further, the Inconel625 overlaying welding protection is adopted for the upper portion of the first flue and the second flue of the waste heat boiler 1.
Further, the main steam pressure from the waste heat boiler 1 is not lower than 13MPa, and the temperature is not lower than 440 ℃.
Furthermore, at least more than 2 waste heat boilers are arranged in the system, the main steam is connected in parallel through a main pipe system, and at least more than 2 steam turbine power generation systems are simultaneously arranged in the system.
The utility model has the advantages that the steam reheating technology is used, and the energy utilization efficiency of the garbage incinerator is improved; the reheater tube bundle with poor heat exchange effect is prevented from being placed in the flue of the waste heat boiler with high-temperature corrosion hazard, the pipeline corrosion of a steam reheating system is reduced, and the equipment stability and the economic benefit of a waste incineration plant are increased; the waste heat boiler only provides main steam for the steam turbine generator units (each steam turbine generator unit comprises a set of steam-water separator and a set of steam reheater) through steam pipelines, so that the reheating system can be used for a main pipe system and a multi-steam-turbine (2 or more) incineration power generation system.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic view of the steam reheating system of the household garbage incineration waste heat boiler adopting main steam for heating.
In the figure, 1, a waste heat boiler, 2, a steam drum, 3, a coal economizer, 4, a steam reheater, 5, a high pressure cylinder of a turbine, 6, a low pressure cylinder of the turbine, 7, a generator, 8, a condenser, 9, a deaerator, 10, a steam-water separator and 11 are feed water pumps.
Detailed Description
The utility model discloses thereby be one kind through improving waste incinerator steam parameter and improve reheat system in middle of steam of energy utilization efficiency, this embodiment is in with the utility model discloses technical scheme implements under the prerequisite, has given detailed embodiment and specific operation process, nevertheless the utility model discloses a scope of protection is not limited to following embodiment.
The system comprises main equipment such as a waste heat boiler 1, a steam drum 2, an economizer 3, a steam reheater 4, a steam turbine high pressure cylinder 5, a steam turbine low pressure cylinder 6, a generator 7, a condenser 8, a deaerator 9, a steam-water separator 10, a water feed pump 11 and the like.
(1) In the waste heat boiler 1, heat generated by waste incineration is absorbed by water through a heat exchanger;
(2) the saturated steam from the steam drum 2 absorbs more energy in the superheater 12 and becomes the main steam of the system with high temperature and high pressure;
(3) the main steam from the superheater 12 enters a steam turbine high-pressure cylinder 5 and a steam reheater 4 in two paths respectively;
(4) the main steam enters a steam-water separator 10 after acting in a steam turbine high-pressure cylinder 5;
(5) the steam-water separator 10 separates saturated water from saturated steam, wherein the saturated steam enters the steam reheater 4 to exchange heat with main steam from the superheater 12, and enters the steam turbine low-pressure cylinder 6 to expand to work and generate power after being heated to superheated steam;
(6) saturated water obtained by the separation of the steam-water separator 10 enters a deaerator 9;
(7) the exhaust steam of the turbine low pressure cylinder 6 enters a condenser 8 for condensation;
(8) the saturated water obtained by the condenser 8 then enters the steam drum 2 through the deaerator 9, the water feed pump 11, the economizer 3 and the like, and the next steam-water circulation process is started.
The present invention will be further described with reference to the following examples.
Example 1
The Inconel625 surfacing protection is used for the water-cooled wall surface above the refractory pouring material in the flue of the waste heat boiler 1 and the water-cooled wall surface of the two flues. The temperature and the pressure of main steam from the superheater 12 are 485 ℃ and 13MPa respectively, and the temperature and the pressure are reduced to 195 ℃ and 1.4MPa respectively after the main steam enters the high-pressure cylinder 5 of the steam turbine for acting; in the steam reheater 4, 485 ℃ and 13MPa main steam from the superheater 12 decomposes and raises the temperature and pressure of 195 ℃ and 1.4MPa steam returned from the high-pressure cylinder 5 to 320 ℃ and 1.4MPa to form superheated steam, the superheated steam (320 ℃ and 1.4MPa) enters the low-pressure turbine cylinder 6 to do work, the exhaust steam of the low-pressure turbine cylinder 6 in the condenser 8 is cooled to supersaturated water of 25 ℃ and 0.003MPa, and the supersaturated water enters the next steam-water circulation process through the deaerator 9, the economizer 3 and the steam drum 2.
Claims (6)
1. A steam reheating system of a household garbage incineration waste heat boiler heated by main steam is characterized in that the main steam of the boiler enters a steam turbine high-pressure cylinder and a steam reheater respectively in two paths; the steam enters a steam-water separator after acting in a high-pressure cylinder of the steam turbine, the separated saturated water enters a deaerator, the saturated steam enters a steam reheater to exchange heat with the other path of main steam, and the reheated superheated steam enters a low-pressure cylinder of the steam turbine to act; the heat source of the steam reheater is the boiler main steam from the superheater.
2. The steam reheating system of the household garbage incineration waste heat boiler adopting main steam for heating as claimed in claim 1, characterized in that in the waste heat boiler (1), heat generated by garbage incineration is absorbed by water through a heat exchanger; saturated steam from the steam drum (2) absorbs more energy in the superheater (12) and becomes system main steam with high temperature and high pressure; main steam from the superheater (12) enters a high-pressure steam turbine cylinder (5) and a steam reheater (4) in two paths respectively; the main steam enters a steam-water separator (10) after acting in a steam turbine high-pressure cylinder (5); the steam-water separator (10) separates saturated water from saturated steam, wherein the saturated steam enters the steam reheater (4) to exchange heat with main steam from the superheater (12), and after the steam is heated to superheated steam, the steam enters the low-pressure cylinder (6) of the steam turbine to expand to work and generate power; saturated water obtained by the separation of the steam-water separator (10) enters a deaerator (9); the exhaust steam of the low-pressure cylinder (6) of the steam turbine enters a condenser (8) for condensation; saturated water obtained by the condenser (8) then enters the steam drum (2) through the deaerator (9), the water feed pump (11) and the economizer (3) to start the next steam-water circulation process.
3. The steam reheating system of the household garbage incineration waste heat boiler adopting main steam for heating as claimed in claim 2, characterized in that the steam reheater (4) is a shell-and-tube heater, the main steam from the superheater (12) flows through the tube side of the steam reheater (4) as a heating medium, and the return steam from the outlet of the steam turbine high-pressure cylinder (5) flows through the shell side for heating.
4. The steam reheating system of the household garbage incineration waste heat boiler adopting main steam for heating as claimed in claim 2, characterized in that a high-pressure cylinder (5) and a low-pressure cylinder (6) of a steam turbine are adopted, and exhaust steam of the high-pressure cylinder (5) is heated to be used as inlet steam of the low-pressure cylinder (6).
5. The steam reheating system of the household garbage incineration waste heat boiler adopting main steam for heating is characterized in that the Inconel625 overlaying welding protection is adopted for the upper portion of the first flue and the second flue of the waste heat boiler (1).
6. The steam reheating system of the household garbage incineration waste heat boiler adopting the main steam for heating as claimed in claim 2, wherein at least 2 waste heat boilers are arranged in the system, the main steam is connected in parallel through a main pipe, and at least 2 steam turbine power generation systems are arranged in the system at the same time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920429124.XU CN210197273U (en) | 2019-03-30 | 2019-03-30 | Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating |
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| CN201920429124.XU CN210197273U (en) | 2019-03-30 | 2019-03-30 | Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608432A (en) * | 2019-03-30 | 2019-12-24 | 上海康恒环境股份有限公司 | Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating |
| CN112065519A (en) * | 2020-09-11 | 2020-12-11 | 上海康恒环境股份有限公司 | High-parameter waste incineration power generation system with dehumidification function |
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2019
- 2019-03-30 CN CN201920429124.XU patent/CN210197273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608432A (en) * | 2019-03-30 | 2019-12-24 | 上海康恒环境股份有限公司 | Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating |
| CN112065519A (en) * | 2020-09-11 | 2020-12-11 | 上海康恒环境股份有限公司 | High-parameter waste incineration power generation system with dehumidification function |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20210820 Address after: No.9, songqiu Road, Xianghuaqiao street, Qingpu District, Shanghai, 201703 Patentee after: SHANGHAI SUS ENVIRONMENT Co.,Ltd. Address before: No.9, songqiu Road, Xianghuaqiao street, Qingpu District, Shanghai, 201703 Patentee before: SHANGHAI SUS ENVIRONMENT RESTORATION Co.,Ltd. |
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