CN111351063A - Novel sludge incineration waste heat utilization system - Google Patents
Novel sludge incineration waste heat utilization system Download PDFInfo
- Publication number
- CN111351063A CN111351063A CN201811478081.0A CN201811478081A CN111351063A CN 111351063 A CN111351063 A CN 111351063A CN 201811478081 A CN201811478081 A CN 201811478081A CN 111351063 A CN111351063 A CN 111351063A
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- Prior art keywords
- temperature
- waste heat
- steam
- heat boiler
- low
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
A novel sludge incineration waste heat utilization system relates to the technical field of environmental protection. The high-temperature flue gas at the outlet of the incinerator sequentially enters a high-temperature waste heat boiler, an air preheater and a low-temperature waste heat boiler. The low-temperature feed water receives heat of low-temperature flue gas through the low-temperature waste heat boiler to form saturated steam, one part of the saturated steam is used for evaporating moisture in wet sludge by the drier, the other part of the saturated steam enters the high-temperature waste heat boiler to absorb high-quality heat to form high-temperature steam, and the high-temperature steam enters the steam turbine to do work and generate electric energy. The air preheater arranged between the two stages of waste heat boilers heats the compressed cold air into high-temperature fluidizing air which is sent to the incinerator. And condensing the steam which is applied with work by the steam turbine into condensed water through an air cooler, mixing the condensed water with the condensed water of the drier, and then conveying the mixed water serving as feed water to the low-temperature waste heat boiler to form closed circulation. The invention adopts the two-stage waste heat boiler to more fully utilize the heat of the flue gas and simultaneously meet the quality requirements of the air required by the incinerator and the steam required by the drier.
Description
Technical Field
The invention relates to the technical field of sludge incineration disposal, energy utilization and environmental protection, in particular to an energy system for efficiently utilizing sludge incineration heat.
Background
Sludge drying and incineration disposal is an efficient and harmless technology, and is a relatively environment-friendly disposal means in a plurality of sludge disposal modes. With the increasingly strict national requirements on environmental protection, sludge drying and incineration projects have very rapid development in China in recent years.
In the prior art, in a conventional sludge drying and incinerating project, flue gas at an outlet of an incinerator firstly enters an air preheater to generate high-temperature air, the flue gas enters a waste heat boiler after passing through the air preheater, and the waste heat boiler generates steam for a drier to use. The mode does not reach the utilization of maximize to the heat in the flue gas, still has the extravagant problem of energy, and the output of system also has increased space.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel sludge incineration waste heat utilization system. The two-stage waste heat boiler is adopted to more fully utilize the heat of the flue gas, and simultaneously meet the quality requirements of air required by the incinerator and steam required by the drier.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a novel sludge incineration waste heat utilization system comprises an incinerator. The structure is characterized in that high-temperature flue gas at the outlet of the incinerator sequentially enters a high-temperature waste heat boiler, an air preheater and a low-temperature waste heat boiler. The low-temperature feed water receives heat of low-temperature flue gas through the low-temperature waste heat boiler to form saturated steam, one part of the saturated steam is used for evaporating moisture in wet sludge by the drier, the other part of the saturated steam enters the high-temperature waste heat boiler to absorb high-quality heat to form high-temperature steam, and the high-temperature steam enters the steam turbine to do work and generate electric energy. The air preheater arranged between the two stages of waste heat boilers heats the compressed cold air into high-temperature fluidizing air which is sent to the incinerator. And condensing the steam which is applied with work by the steam turbine into condensed water through an air cooler, mixing the condensed water with the condensed water of the drier, and then conveying the mixed water serving as feed water to the low-temperature waste heat boiler to form closed circulation.
Due to the adoption of the structure, the invention can meet the requirements of the fluidized air temperature of the sludge incinerator and the required steam quality of the drier while improving the existing flue gas waste heat utilization system, and has no influence on the performance of the existing system. Simultaneously, compare with prior art and have following advantage and beneficial effect:
1. the system is additionally provided with the high-temperature waste heat boiler, the small steam turbine and the air cooler, so that the added equipment is less, the occupied area is small, and the benefit of electric energy output is obvious.
2. The air preheater is arranged between the two stages of waste heat boilers, utilizes lower-quality flue gas to heat cold air, and meets the air temperature requirement of the sludge incinerator by using lower-quality energy.
3. The flue gas is used for producing high-temperature steam at the high-temperature section and is used for doing work, and the saturated steam produced at the low-temperature section meets the requirements of the drier, so that the heat utilization rate of the flue gas is increased.
And 4. the condensed water of the condenser is mixed with the condensed water of the drier and is used as the feed water to be supplied to the waste heat boiler.
The invention is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
Referring to fig. 1, the novel sludge incineration waste heat utilization system comprises an incinerator 15, a high-temperature waste heat boiler 16, an air preheater 17, a low-temperature waste heat boiler 18 and a drier 21 which are connected in sequence. The low-temperature section saturated steam branched from the steam side of the high-temperature waste heat boiler 16 passes through a steam turbine 19 and an air cooler 20 and then is respectively connected to a drier 21 and the low-temperature waste heat boiler 18, and the steam turbine 19 works and generates electric energy. The low-temperature waste heat boiler 18 sends a part of saturated steam after the feed water is heated to the drier 21, and the other part of the saturated steam is sent to the high-temperature waste heat boiler 16. The air preheater 17 heats the compressed cool air into fluidizing air to the incinerator 15.
When the invention is operated, the dried sludge enters the sludge incinerator 15, and the sludge is completely incinerated under the circulating action of the hot air and the heat carrier. The incinerated flue gas firstly enters a high-temperature waste heat boiler 16, saturated steam heated by a low-temperature waste heat boiler 18 is input at the steam side of the high-temperature waste heat boiler 16, and the steam becomes superheated steam after being heated and enters a steam turbine 19 to do work. The flue gas from the high-temperature waste heat boiler 16 enters an air preheater 17 to heat external cold air, and the cold air is heated and then sent into the sludge incinerator 15 as fluidized air. The flue gas from the air preheater 17 enters the low-temperature waste heat boiler 18, and heats the feed water of the low-temperature waste heat boiler 18 into saturated steam to be discharged. The discharged saturated steam is divided into two parts, one part is used for air for the drier 21, and the other part is introduced into the high-temperature waste heat boiler 16. Steam generated by the steam turbine 19 after working to generate electric energy is condensed by the air cooler 20, and condensed water is mixed with hot water at the outlet of the drier 21 and is sent to the low-temperature waste heat boiler 18 as feed water.
Claims (1)
1. The utility model provides a novel sludge incineration waste heat utilization system, it includes burns burning furnace (15), a serial communication port, the high temperature flue gas that burns burning furnace (15) export gets into high temperature exhaust-heat boiler (16) in proper order, air heater (17) and low temperature exhaust-heat boiler (18), the low temperature is feedwater and is formed saturated steam through the heat that low temperature exhaust-heat boiler (18) received low temperature flue gas, saturated steam partly is arranged in moisture in drier (21) evaporation wet sludge, another part saturated steam gets into high temperature exhaust-heat boiler (16) and absorbs high-quality heat and forms high-temperature steam, high-temperature steam gets into steam turbine (19) and does work and produces electric energy, air heater (17) that set up between two-stage exhaust-heat boiler heat the compressed cold air into high temperature fluidization wind and send to burning furnace (15), the steam after steam turbine (19) do work passes through air cooler, and the mixed water is used as feed water to be sent to a low-temperature waste heat boiler (18) to form closed circulation after being mixed with the condensed water of the drier (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478081.0A CN111351063A (en) | 2018-12-05 | 2018-12-05 | Novel sludge incineration waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478081.0A CN111351063A (en) | 2018-12-05 | 2018-12-05 | Novel sludge incineration waste heat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111351063A true CN111351063A (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811478081.0A Pending CN111351063A (en) | 2018-12-05 | 2018-12-05 | Novel sludge incineration waste heat utilization system |
Country Status (1)
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| CN (1) | CN111351063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983474A (en) * | 2021-10-28 | 2022-01-28 | 上海发电设备成套设计研究院有限责任公司 | Device system and method for generating power by drying and incinerating sludge |
| CN114542221A (en) * | 2022-02-22 | 2022-05-27 | 上海发电设备成套设计研究院有限责任公司 | Device system and method for power station peak shaving and sludge drying energy storage |
-
2018
- 2018-12-05 CN CN201811478081.0A patent/CN111351063A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983474A (en) * | 2021-10-28 | 2022-01-28 | 上海发电设备成套设计研究院有限责任公司 | Device system and method for generating power by drying and incinerating sludge |
| CN114542221A (en) * | 2022-02-22 | 2022-05-27 | 上海发电设备成套设计研究院有限责任公司 | Device system and method for power station peak shaving and sludge drying energy storage |
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