CN214250594U - Flue gas heat storage system - Google Patents
Flue gas heat storage system Download PDFInfo
- Publication number
- CN214250594U CN214250594U CN202023182387.7U CN202023182387U CN214250594U CN 214250594 U CN214250594 U CN 214250594U CN 202023182387 U CN202023182387 U CN 202023182387U CN 214250594 U CN214250594 U CN 214250594U
- Authority
- CN
- China
- Prior art keywords
- outlet
- inlet
- flue
- valve
- outlet flue
- 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
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a flue gas heat-retaining system, include: the sintering waste heat boiler is provided with a first inlet pipeline and a first outlet flue, and a branch pipeline is arranged on the first inlet pipeline; the solid heat storage device is provided with a second inlet pipeline and a second outlet flue, and the second inlet pipeline is communicated with the branch pipeline; a cold air valve is arranged on the second inlet pipeline; the circulating fan is provided with a circulating fan outlet and a circulating fan inlet, the circulating fan outlet is communicated to the second outlet flue through a heat release pipeline, and the circulating fan inlet is communicated to the first outlet flue; and the second outlet flue is communicated to the first outlet flue through a first electric butterfly valve and a second electric gas stop valve. The problem of current sintering waste heat power generation frequently shut down the stove and shut down is solved.
Description
Technical Field
The utility model belongs to the technical field of the heat-retaining, concretely relates to flue gas heat-retaining system.
Background
The prior sintering waste heat power generation system has the following defects in actual operation: 1. the waste heat boiler of the sintering waste heat power generation system passively receives the flue gas waste heat of the circular cooler, the working state of the waste heat boiler is completely controlled by the working state of the circular cooler, the load fluctuation is large, the power generation power cannot be effectively combined with the peak-valley electricity price, and the electricity price difference benefit brought by the peak-valley adjustment cannot be realized. 2. The shutdown caused by the fault of the sintering circular cooler leads the waste heat power generation system not to be continuously operated for a long time, and the economic benefit is not expected. 3. The fluctuation of the smoke volume and the smoke temperature of the waste heat boiler causes the fluctuation of steam parameters and the fluctuation of generated energy, and the waste heat boiler does not use stable load.
The main target of the high-efficiency utilization of the sintering waste heat is that the waste heat boiler can continuously and stably supply steam at any time, so that the steam turbine generator unit stably generates electricity and brings higher electricity generation benefit. The flue gas heat storage system can realize long-time large-scale storage and planned heat release, thereby overcoming the defects existing in the actual operation of the existing sintering waste heat power generation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a flue gas heat-retaining system to solve the problem that current sintering waste heat power generation frequently stops the stove and shut down.
The utility model adopts the following technical scheme: a flue gas thermal storage system comprising:
the sintering waste heat boiler is provided with a first inlet pipeline and a first outlet flue, and a branch pipeline is arranged on the first inlet pipeline;
the solid heat storage device is provided with a second inlet pipeline and a second outlet flue, and the second inlet pipeline is communicated with the branch pipeline; a cold air valve is arranged on the second inlet pipeline;
the circulating fan is provided with a circulating fan outlet and a circulating fan inlet, the circulating fan outlet is communicated to the second outlet flue through a heat release pipeline, and the circulating fan inlet is communicated to the first outlet flue;
and the second outlet flue is communicated to the first outlet flue through a first electric butterfly valve and a second electric gas stop valve.
Furthermore, a first electric gas stop valve and a first electric adjusting valve are arranged on the branch pipeline.
Furthermore, a second electric regulating valve, a third electric gas cut-off valve and a second electric butterfly valve are arranged on the second outlet flue.
The utility model has the advantages that: the system improves the economic benefit of the waste heat generator set, solves the problems of emergency shutdown, stable load and system freeze prevention caused by short-time faults on the furnace side.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The system comprises a first electric gas stop valve 1, a first electric regulating valve 2, a cold air valve 3, a first electric butterfly valve 4, a solid heat storage device 9, a sintering waste heat boiler 10, a circulating fan 11, a first inlet pipeline 12, a first outlet flue 13, a branch pipeline 14, a second inlet pipeline 15, a second outlet flue 16, a heat release pipeline 17, a circulating fan outlet 18 and a circulating fan inlet 19.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a flue gas heat-retaining system, as shown in figure 1, it includes sintering exhaust-heat boiler 10, solid heat-retaining device 9 and circulating fan 11.
The sintering waste heat boiler 10 is provided with a first inlet pipeline 12 and a first outlet flue 13, and a branch pipeline 14 is arranged on the first inlet pipeline 12. The solid heat storage device 9 has a second inlet duct 15 and a second outlet flue 16, the second inlet duct 15 and the branch duct 14 being in communication; and a cold air valve 3 is arranged on the second inlet pipeline 15. The recycle fan 11 has a recycle fan outlet 18 and a recycle fan inlet 19, the recycle fan outlet 18 being connected to the second outlet flue 16 by a heat release duct 17, the recycle fan inlet 19 being connected to the first outlet flue 13. The second outlet flue 16 is connected to the first outlet flue 13 via a first electrically operated butterfly valve 4 and a second electrically operated gas shut-off valve 5.
In some embodiments, the branch line 14 is provided with a first electric gas cutoff valve 1 and a first electric control valve 2.
In some embodiments, a second electrically adjustable valve 6, a third electrically operated gas shut-off valve 7 and a second electrically operated butterfly valve 8 are provided in the second outlet stack 16.
The utility model discloses a flue gas heat-retaining system's application method as follows:
1. heat charging process and system configuration (valley power time period): a branch pipeline 14 is arranged on a first inlet pipeline 12 of the sintering waste heat boiler 10, flue gas in the valley power time period is sent to a solid heat storage device 9 through a first electric gas stop valve 1 and a first electric regulating valve 2, and after heat storage is carried out through the solid heat storage device 9, a second outlet flue 16 of the solid heat storage device 9 is connected to a first outlet flue 13 of the sintering waste heat boiler through an electric butterfly valve 4 and a second electric gas stop valve 5. A cold air valve 3 is arranged on the second inlet pipe 15 of the solid heat storage device 9 so as to regulate the temperature of the flue gas entering the solid heat storage device 9. And under the heating working condition, the second electric regulating valve 6, the third electric gas cut-off valve 7 and the second electric butterfly valve 8 on the heat release pipeline 17 between the circulating fan outlet 18 and the solid heat storage device 9 are in a closed state.
2. Heat release flow and system setup (peak power time period): the circulating fan 11 is used for extracting hot air from the tail part of the sintering waste heat boiler 10, the hot air enters the solid heat storage device 9 through the second electric butterfly valve 8, the third electric gas stop valve 7 and the second electric regulating valve 6 for heat exchange, the hot air enters the sintering waste heat boiler 10 through the first electric regulating valve 2 and the first electric gas stop valve 1 after the temperature rises, the hot air is mixed with high-temperature hot air from the outlet of the afterburning furnace and then enters the sintering waste heat boiler 10, and the flue gas releases heat to a working medium of the sintering waste heat boiler 10 and then enters the circular cooler through the circulating fan 11. And in the heat release working condition, the first electric butterfly valve 4 and the second electric gas cut-off valve 5 on the second outlet flue 16 of the solid heat storage device 9 are in a closed state.
The utility model discloses a flue gas heat-retaining system has following advantage:
1) the peak shaving power generation improves the power generation income: when the electricity price of the user is poor when the electricity consumption is peak-valley, part of the smoke gas flow entering the sintering waste heat boiler in the valley electricity time period is shunted to enter the smoke gas heat storage device for heat storage, and the heat is released in the peak electricity time period. And part of the valley power generation amount is transferred to the peak power time period through the heat charging and discharging of the flue gas heat storage device, so that the economic benefit brought by the peak-valley power price difference is obtained.
2) The problem of emergency shutdown caused by short-time faults of the furnace side is solved: when the failure rate of the sintering machine and the ring cooling machine in the operation is high, when the sintering machine and the ring cooling machine have failures, the boiler is forced to stop operation, the steam turbine generator unit is forced to stop operation, and a large amount of heat is lost in restarting after the failure processing is finished. The heat that usable flue gas heat-retaining device prestore maintains not shutting down for a short time, waits that sintering machine and ring cold machine salvage finish, can resume normal operating condition fast, improves the electricity generation income greatly.
When the turbo generator set is shut down for a short time due to temporary faults, the flue gas heat storage device can be switched to a heat charging mode to store the heat of the flue gas, the standby side finishes rush repair, and the flue gas heat storage device emits heat timely according to the operation condition when the standby side recovers to normal operation, so that the utilization rate of the waste heat of the flue gas is improved.
3) And (3) stabilizing load: the waste heat power station is influenced by a main production line, the temperature and the amount of flue gas of a boiler often fluctuate, and even shutdown is caused in severe cases. By adding the flue gas heat storage device, when the flue gas volume is large or the temperature of the flue gas is higher, the flue gas at the inlet of the boiler can be shunted to the flue gas heat storage device through the connected branch pipeline for heat storage; when the flue gas is insufficient, the heat storage device is switched to a heat release mode, the heat stored by the heat storage device is released in a flue gas mode and enters the boiler, and the stability of the flue gas volume and the flue gas temperature at the inlet of the boiler is maintained, so that the stability of the steam inlet volume and the steam inlet temperature of the steam turbine generator unit is maintained, the running stability of the unit is improved, the service life of the waste heat power station equipment is prolonged, and the economic loss caused by shutdown is reduced.
4) And (3) freezing prevention of the system: before the turbo generator set is overhauled in winter, the flue gas heat storage system can store corresponding heat in advance, and the maintenance time quantum device can release heat to the boiler system and provide the system heat source of preventing frostbite of about a week, reducible anti-freezing measure implementation expense.
Claims (3)
1. A flue gas heat storage system, comprising:
a sintering waste heat boiler (10) having a first inlet duct (12) and a first outlet flue (13), the first inlet duct (12) being provided with a branch line (14);
a solid heat storage device (9) having a second inlet duct (15) and a second outlet flue (16), the second inlet duct (15) being in communication with the branch duct (14); a cold air valve (3) is arranged on the second inlet pipeline (15);
a circulation fan (11) having a circulation fan outlet (18) and a circulation fan inlet (19), the circulation fan outlet (18) being connected to the second outlet flue (16) by a heat release duct (17), the circulation fan inlet (19) being connected to the first outlet flue (13);
the second outlet flue (16) is communicated to the first outlet flue (13) through a first electric butterfly valve (4) and a second electric gas stop valve (5).
2. A flue gas heat storage system according to claim 1, wherein a first electrically operated gas shut-off valve (1) and a first electrically operated regulating valve (2) are provided in the branch line (14).
3. A flue gas heat storage system according to claim 1 or 2, wherein a second electric regulating valve (6), a third electric gas cut-off valve (7) and a second electric butterfly valve (8) are arranged on the second outlet flue (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023182387.7U CN214250594U (en) | 2020-12-25 | 2020-12-25 | Flue gas heat storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023182387.7U CN214250594U (en) | 2020-12-25 | 2020-12-25 | Flue gas heat storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214250594U true CN214250594U (en) | 2021-09-21 |
Family
ID=77742295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023182387.7U Active CN214250594U (en) | 2020-12-25 | 2020-12-25 | Flue gas heat storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214250594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353541A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | System and method for improving operation stability of waste heat boiler of heating furnace |
| CN114413637A (en) * | 2022-01-20 | 2022-04-29 | 北京思安综合能源发展有限公司 | Heat storage peak regulation device, waste heat power generation system and method |
-
2020
- 2020-12-25 CN CN202023182387.7U patent/CN214250594U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353541A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | System and method for improving operation stability of waste heat boiler of heating furnace |
| CN114353541B (en) * | 2022-01-07 | 2023-09-26 | 鞍钢股份有限公司 | System and method for improving operation stability of waste heat boiler of heating furnace |
| CN114413637A (en) * | 2022-01-20 | 2022-04-29 | 北京思安综合能源发展有限公司 | Heat storage peak regulation device, waste heat power generation system and method |
| CN114413637B (en) * | 2022-01-20 | 2024-04-30 | 北京思安综合能源发展有限公司 | Heat storage peak regulation device, waste heat power generation system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109798157B (en) | Condensing and back-pumping coupled steam extraction integrated system for thermoelectric unit power peak regulation and operation method thereof | |
| CN214250594U (en) | Flue gas heat storage system | |
| CN108316981B (en) | Natural gas residual pressure and gas turbine coupling and supplying system, pipe network system and method | |
| CN206785443U (en) | A kind of high-pressure natural gas cogeneration distributed energy resource system | |
| EP2578951A2 (en) | Small-scale combined heat and power system and method for controlling same | |
| CN111852595A (en) | Efficient thermal power plant deep peak regulation system and method | |
| CN115717845A (en) | Method for improving peak regulation capacity of thermal power generating unit by fused salt energy storage | |
| CN108468575B (en) | System for changing extraction condensing unit into back pressure unit based on injection heat pump and operation method thereof | |
| CN113864016A (en) | Diesel generator standby system based on molten salt heat storage of power plant | |
| CN210951252U (en) | Efficient supercritical carbon dioxide boiler working medium temperature regulating system | |
| CN209800040U (en) | Internal bypass steam turbine power generation system applied to cogeneration unit | |
| CN212565993U (en) | Heat supply operation system for prolonging service life of safety valve | |
| CN109209536B (en) | Variable heat energy recovery system and method for cogeneration unit | |
| CN108730951B (en) | Auxiliary frequency modulation and peak shaving system and method by using high-pressure low-temperature economizer | |
| CN113107625A (en) | Multi-heat-source wide-load low-pressure industrial steam supply system and working method | |
| CN220958521U (en) | System for lifting primary hot air temperature based on high-temperature flue gas | |
| CN210637123U (en) | Tower type photothermal power station bypass valve pressure reduction system | |
| CN211975174U (en) | Afterburning reheating peak regulation steam turbine set | |
| CN215979530U (en) | Diesel generator standby system based on molten salt heat storage of power plant | |
| CN213817251U (en) | New energy coupling thermal power generating unit power generation energy storage peak regulation combined system | |
| CN220791326U (en) | Heat storage peak shaving system applied to CCPP power generation | |
| CN216384324U (en) | Device for quickly adjusting load by using long-distance heat supply pipe network | |
| CN221074393U (en) | Turbine power generation system capable of carrying out peak regulation in real time | |
| CN115127136B (en) | Energy storage and heat supply system and method based on renewable energy source heating power station | |
| CN211082003U (en) | Waste heat power generation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |