CN214664529U - Gasification air supply system for ash storage of coal burner unit - Google Patents
Gasification air supply system for ash storage of coal burner unit Download PDFInfo
- Publication number
- CN214664529U CN214664529U CN202120835844.3U CN202120835844U CN214664529U CN 214664529 U CN214664529 U CN 214664529U CN 202120835844 U CN202120835844 U CN 202120835844U CN 214664529 U CN214664529 U CN 214664529U
- Authority
- CN
- China
- Prior art keywords
- gasification
- fan
- flue gas
- heat exchanger
- ash
- 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
- 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
Landscapes
- Air Supply (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The utility model discloses an ash storehouse gasification wind air supply system is organized to coal burner, including the gasification fan, the clean flue gas export of gasification fan's entry intercommunication flue gas pipe connection desulfurizing tower, the export of gasification fan links to each other with the heat exchanger that sets up before the electric precipitation, clean flue gas is sent into the ash storehouse through ash storehouse gasification wind pipeline after the high temperature flue gas heating of heat exchanger. The utility model discloses can make gasification wind air feed temperature and ash storehouse in the ash content temperature phase-match, reduce the unusual disturbance that causes system and unit operation of equipment, avoid unstable problems such as electrical heating abnormal tripping operation to the economic nature is better.
Description
Technical Field
The utility model relates to an ash storehouse warehousing and transportation technical field, in particular to coal burner group ash storehouse gasification wind air supply system.
Background
The ash storehouse of the coal-fired unit is used for storing and conveying the ash after combustion in the boiler flue gas removed by the electric dust removal, and is an important component of an ash storehouse storage and transportation system of the coal-fired unit. The ash storehouse gasification air is introduced into the ash storehouse, and the ash deposited in the ash storehouse flows under the blast of wind power, so that the dust is prevented from being hardened, and the ash is convenient to discharge and transport. In order to ensure a good gasification effect and reduce hardening caused by the temperature difference between gasification air and ash content, the gasification air sent into the ash silo needs to be heated to be close to the temperature of the ash content before entering the ash silo.
At present, a conventionally designed ash storehouse gasification air supply system adopts a centrifugal fan to supply air, and adopts electric heating to heat and raise the temperature of the air and then send the air into an ash storehouse so as to achieve the design purpose. This design has drawbacks in terms of economy and reliability.
1. The electric heating belongs to high-energy-consumption equipment, and the service power of the unit can be increased after long-time operation, so that the economic benefit of the unit is influenced;
2. the electrical heating operation life is limited, and the reliability of continuous heating is poor, and if the electrical heating trips abnormally or the power drops, the gas supply temperature can not be guaranteed, the low-temperature gasification air is sent into the ash storehouse to cause dust hardening, the ash in the ash storehouse is blocked seriously, and the coal-fired unit is forced to stop because of the unable discharge of ash.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art, the utility model aims to provide a coal burner group ash storehouse gasification wind air feed system can make gasification wind air feed temperature and ash storehouse in ash temperature phase-match, reduces the unusual disturbance that causes system and unit operation of equipment, avoids unstable problems such as the unusual tripping operation of electrical heating to the economic nature is better.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides an ash storehouse gasification wind air supply system of coal burner group, includes the gasification fan, the clean flue gas export of gasification fan's entry intercommunication flue gas pipeline connection desulfurizing tower 5, the export of gasification fan links to each other with the pipe side of setting up heat exchanger 2 before 3 electrostatic precipitator, clean flue gas is after the high temperature flue gas heating of heat exchanger 2, sends into ash storehouse 19 through ash storehouse gasification wind pipeline 18.
The gasification fan comprises a first gasification fan 10 and a second gasification fan 11 which are arranged in parallel, wherein a first manual door 8 is arranged at an inlet of the first gasification fan 10, a third manual door 12 is arranged at an outlet of the first gasification fan, a second manual door 9 is arranged at an inlet of the second gasification fan 11, and a fourth manual door 13 is arranged at an outlet of the second gasification fan.
The flue gas pipeline of 3 and the coal fired boiler 1 export of electrostatic precipitator links to each other, heat exchanger 2 sets up in the flue gas pipeline of 1 export of coal fired boiler for promote the medium temperature of gasification fan export, the flue gas behind the desorption ash content among the electrostatic precipitator 3 sucks entering desulfurizing tower 5 under the negative pressure that draught fan 4 formed.
The heat exchanger 2 is a surface type heat exchanger, gasification air at the outlet of the gasification fan flows through the inside of the pipe, high-temperature flue gas at the outlet of the coal-fired boiler 1 flows outside the pipe, and the temperature of the gasification air is increased through heat exchange.
The heat exchanger 2 is provided with a heat exchanger outlet pipeline 15, the heat exchanger outlet pipeline 15 is connected with an ash storehouse 19 through an ash storehouse gasification air pipeline 18, the heat exchanger outlet pipeline 15 is provided with an electric heater 16 and a temperature sensor 17, and the electric heater 16 performs auxiliary heating during the shutdown period of the coal burner unit or when the gasification air temperature does not reach the standard.
A gas supply method of a gasification air supply system of an ash storage of a coal burner unit comprises the following steps;
when the system is put into use, opening a first manual door 8 and a second manual door 9 at inlets of a first gasification fan 10 and a second gasification fan 11, and guiding the clean flue gas after the desulfurizing tower 5 into the inlets of the first gasification fan 10 and the second gasification fan 11; starting a first gasification fan 10 and a second gasification fan 11, opening a third manual door 12 and a fourth manual door 13 at the outlet of the gasification fans, and conveying the pressurized clean flue gas to the heat exchanger 2 through an outlet pipeline 14 of the gasification fans; the pressurized clean flue gas exchanges heat with high-temperature flue gas at the outlet of the coal-fired boiler 1 in the heat exchanger 2, and the heated clean flue gas is sent to an ash silo 19 as gasified air;
in the operation of the system, a temperature sensor 17 put on a gasification air pipeline 18 at the inlet of the ash silo is used for monitoring the temperature of gasification air, when a coal-fired unit is stopped or a heater 2 cannot meet the temperature requirement of the gasification air, an alarm signal is sent to a control system, and meanwhile, an electric heater 16 is automatically started to maintain the designed temperature of the gasification air; when the temperature is higher than the designed value, the temperature sensor 17 sends a signal to the control system to automatically stop the electric heater 16, and when one fan fails, the fan can quit operation and start the other spare fan to continue air supply.
The temperature of the high-temperature flue gas at the outlet of the coal-fired boiler 1 is between 120 and 130 ℃.
The coal-fired unit ash storehouse gasification air supply system is used for an ash storehouse storage and transportation system.
The ash storehouse storage and transportation system is used for a coal-fired unit.
The utility model has the advantages that:
when the utility model is operated, the clean flue gas is extracted from the outlet pipeline of the desulfurizing tower to be used as the source of the gasified air, and a filter is not needed, so that the environmental protection emission requirement can be met; the temperature of clean flue gas at the outlet of the desulfurizing tower reaches 70-80 ℃, which is far higher than the environmental temperature, and the clean flue gas is used as gasification air, so that low-grade heat can be effectively utilized; the high-temperature flue gas at the outlet of the coal-fired boiler is used for heating the gasified air, so that the temperature of the gasified air is matched with the temperature of ash in the ash warehouse, the possibility of ash hardening is reduced, meanwhile, electric heating is not adopted, the electricity consumption of electric heating is reduced, the station service power is reduced, and the economical efficiency is higher; meanwhile, the running risk caused by abnormal tripping of electric heating is avoided, and the supply reliability of the gasified air is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a coal-fired boiler, 2 is a heat exchanger, 3 is an electric dust remover, 4 is a draught fan, 5 is a desulfurizing tower, 6 is a chimney, 7 is a gasification fan inlet pipeline, 8 is an inlet manual door I, 9 is an inlet manual door II, 10 is a gasification fan I, 11 is a gasification fan II, 12 is an outlet manual door III, 13 is an outlet manual door IV, 14 is a gasification fan outlet pipeline, 15 is a heat exchanger outlet pipeline, 16 is an electric heater, 17 is a temperature sensor, 18 is an ash storehouse gasification air pipeline, and 19 is an ash storehouse.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a coal fired boiler 1, heat exchanger 2, electric precipitation 3, draught fan 4, desulfurizing tower 5, chimney 6, gasification fan inlet pipe 7, entry manual door, export manual door, gasification fan outlet pipe 14, heat exchanger outlet pipe 15, electrical heating 16, temperature sensor 17, ash storehouse gasification wind pipeline 18 and ash storehouse 19.
The clean flue gas at the outlet of the desulfurizing tower 5 is divided into two paths, wherein one path is communicated with the gasification fan through an inlet pipeline 7, and the other path is discharged into the atmosphere through a chimney 6. The gasification fans are arranged in parallel, a manual door is arranged at an inlet, and a manual door is arranged at an outlet. The heat exchanger 2 is arranged in the flue gas pipeline at the outlet of the coal-fired boiler 1, the purified flue gas at the outlet of the desulfurizing tower 5 is subjected to pressure rise through the gasification fan and then is subjected to heat exchange with the high-temperature flue gas at the outlet of the coal-fired boiler 1 in the heat exchanger 2, and the purified flue gas is heated and then is connected with the ash silo 19 through the heat exchanger outlet pipeline 15, the electric heater 16, the temperature sensor 17 and the ash silo gasification air pipeline 18.
The utility model discloses a concrete operation process does:
when the coal-fired unit operates, high-temperature flue gas at the outlet of the coal-fired boiler 1 enters the electric dust collector 3 through the heat exchanger 2, and is sucked under the negative pressure formed by the draught fan 4 and enters the desulfurizing tower 5 after ash is removed from the electric dust collector 3. The clean flue gas at the outlet of the desulfurizing tower 5 is divided into two paths, wherein one path is communicated with a gasification fan through an inlet pipeline 7 to supply a gasification air source, and the other path is discharged into the atmosphere through a chimney 6. When the system is put into use, opening a first manual door 8 and a second manual door 9 of inlets of a first gasification fan 10 and a second gasification fan 11, and guiding the clean flue gas after the desulfurizing tower 5 into the inlet of the gasification fan; starting a first gasification fan 10 and a second gasification fan 11, opening a third manual door 12 and a fourth manual door 13 at the outlet of the gasification fans, and conveying the pressurized clean flue gas to the heat exchanger 2 through an outlet pipeline 14 of the gasification fans; the pressurized clean flue gas exchanges heat with high-temperature flue gas at the outlet of the coal-fired boiler 1 in the heat exchanger 2, and the heated clean flue gas is sent to the ash silo 19 as gasified air.
In system operation, a temperature sensor 17 on the ash silo inlet gasification air duct 18 is used to monitor the gasification air temperature. When the coal-fired unit is shut down or the heater 2 cannot meet the temperature requirement of the gasified air, an alarm signal is sent to the control system, and meanwhile, the electric heater 16 is automatically started to maintain the designed temperature of the gasified air; when the temperature is higher than the design value, the temperature sensor 17 sends a signal to the control system, automatically deactivating the electric heater 16. When one fan breaks down, the fan can quit operation, and the other standby fan is started to continue air supply.
Furthermore, the temperature of the high-temperature flue gas extracted from the flue gas outlet of the coal-fired boiler 1 is between 120 ℃ and 130 ℃, the high-temperature flue gas is matched with the temperature of the stored ash in the ash warehouse 19, the high-temperature flue gas can ensure good gasification effect without heating by using electricity, and the high-temperature flue gas is energy-saving and reliable.
Further, the gasification fan 10/11 for conveying the clean flue gas is two centrifugal fans arranged in parallel, a one-use one-standby operation mode is adopted, when one fan fails, the one fan can quit operation, the other standby fan is started to continue air supply, and the operation reliability of the system is ensured.
Further, the heat exchanger 2 is a surface heat exchanger, the gasification air at the outlet of the gasification fan flows through the pipe, the high-temperature flue gas at the outlet of the coal-fired boiler 1 flows outside the pipe, and the temperature of the gasification air is raised through heat exchange.
Further, an electric heater 16 connected in series is arranged on an outlet pipeline of the heat exchanger 2, and auxiliary heating is carried out during shutdown of the coal burner unit or when the temperature of the gasification air does not reach the standard.
Further, a temperature sensor 17 on the gasification air duct 18 at the ash silo inlet is used for monitoring the temperature of the gasification air, and when the temperature is monitored to be lower than a set value, the electric heater 16 is automatically started through DCS interlocking logic to carry out auxiliary heating.
Coal burner group ash storehouse gasification wind air feed method, including following step:
when the system is put into use, opening a first manual door 8 and a second manual door 9 at inlets of a first gasification fan 10 and a second gasification fan 11, and guiding the clean flue gas after the desulfurizing tower 5 into the inlets of the first gasification fan 10 and the second gasification fan 11; starting a first gasification fan 10 and a second gasification fan 11, opening a third manual door 12 and a fourth manual door 13 at the outlet of the gasification fans, and conveying the pressurized clean flue gas to the heat exchanger 2 through an outlet pipeline 14 of the gasification fans; the pressurized clean flue gas exchanges heat with high-temperature flue gas at the outlet of the coal-fired boiler 1 in the heat exchanger 2, and the heated clean flue gas is sent to the ash silo 19 as gasified air.
In system operation, a temperature sensor 17 on the ash silo inlet gasification air duct 18 is used to monitor the gasification air temperature. When the coal-fired unit is shut down or the heater 2 cannot meet the temperature requirement of the gasified air, an alarm signal is sent to the control system, and meanwhile, the electric heater 16 is automatically started to maintain the designed temperature of the gasified air; when the temperature is higher than the design value, the temperature sensor 17 sends a signal to the control system, automatically deactivating the electric heater 16. When one fan breaks down, the fan can quit operation, and the other standby fan is started to continue air supply.
Claims (5)
1. The utility model provides an ash storehouse gasification wind air feed system of coal burner group, a serial communication port, including the gasification fan, the net flue gas export of the entry intercommunication flue gas pipeline connection desulfurizing tower (5) of gasification fan, the export of gasification fan links to each other with the pipe side that sets up heat exchanger (2) before electric precipitation (3), the ash storehouse (19) is sent into through ash storehouse gasification wind pipeline (18) to net flue gas after the high temperature flue gas heating of heat exchanger (2).
2. The coal burner group ash storehouse gasification air supply system of claim 1, wherein the gasification fan comprises a first gasification fan (10) and a second gasification fan (11) which are arranged in parallel, the inlet of the first gasification fan (10) is provided with a first manual door (8), the outlet of the first gasification fan is provided with a third manual door (12), the inlet of the second gasification fan (11) is provided with a second manual door (9), and the outlet of the second gasification fan is provided with a fourth manual door (13).
3. The coal burner group ash storehouse gasification air supply system of claim 1, characterized in that, the flue gas pipeline that electric precipitation (3) and coal fired boiler (1) export link to each other, heat exchanger (2) set up in the flue gas pipeline of coal fired boiler (1) export for promote the medium temperature of gasification fan export, flue gas behind the desorption ash content in electric precipitation (3) is the suction under the negative pressure that draught fan (4) formed and is got into desulfurizing tower (5).
4. The coal burner group ash storage gasification air supply system as claimed in claim 3, wherein the heat exchanger (2) is a surface heat exchanger, gasification air at the outlet of the gasification fan flows through a pipe, high-temperature flue gas at the outlet of the coal-fired boiler (1) flows outside the pipe, and the temperature of the gasification air is raised through heat exchange.
5. The gasification air supply system for the ash storage of the coal burner group as claimed in claim 1, characterized in that a heat exchanger outlet pipeline (15) is arranged on the heat exchanger (2), the heat exchanger outlet pipeline (15) is connected with an ash storage (19) through an ash storage gasification air pipeline (18), an electric heater (16) and a temperature sensor (17) are arranged on the heat exchanger outlet pipeline (15), and the electric heater (16) is used for auxiliary heating during the shutdown of the coal burner group or when the gasification air temperature does not reach the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835844.3U CN214664529U (en) | 2021-04-22 | 2021-04-22 | Gasification air supply system for ash storage of coal burner unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835844.3U CN214664529U (en) | 2021-04-22 | 2021-04-22 | Gasification air supply system for ash storage of coal burner unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214664529U true CN214664529U (en) | 2021-11-09 |
Family
ID=78465729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120835844.3U Active CN214664529U (en) | 2021-04-22 | 2021-04-22 | Gasification air supply system for ash storage of coal burner unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214664529U (en) |
-
2021
- 2021-04-22 CN CN202120835844.3U patent/CN214664529U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203867644U (en) | Compressed air energy storage system | |
| CN206469276U (en) | A kind of heat accumulating type catalytic burning device | |
| CN214664529U (en) | Gasification air supply system for ash storage of coal burner unit | |
| CN113154424A (en) | Gasification air supply system and method for ash storage of coal burner unit | |
| CN213803860U (en) | Blast furnace raw gas heating device | |
| CN111321263A (en) | Blast furnace raw gas heating method and device | |
| CN101270874B (en) | Coal-burning type boiler breeze blowing combustion device | |
| CN214468721U (en) | Air supply system for gasified air of electric dust removal ash bucket | |
| CN220602313U (en) | Novel online ash removal of biomass boiler air heat transfer device | |
| CN102607286A (en) | Molten salt furnace afterheat power-generation and combustion comprehensive utilizing system | |
| CN201221760Y (en) | Fire coal type boiler coal fines blowing combustion apparatus | |
| CN220955812U (en) | Thermoelectric linkage power generation device in ceramic industry | |
| CN216644235U (en) | Device for reducing content of nitrogen oxides in waste gas | |
| CN218755850U (en) | High-efficient recovery system of converter coal gas | |
| CN219036665U (en) | Cooling air recovery device of dry slag discharging system of coal-fired boiler | |
| CN112923386A (en) | Air supply system and method for air gasification of electric dust removal ash bucket | |
| CN220502897U (en) | Combustion-supporting air heating system | |
| CN211260947U (en) | Rural straw bundle burning direct-fired heat supply system | |
| CN220471603U (en) | High-pressure fluidization air system of circulating fluidized bed | |
| CN216584878U (en) | Dry quenching system | |
| CN212644668U (en) | Energy-saving boiler shutdown system | |
| CN212157136U (en) | Bed material recycling device in circulating fluidized bed boiler operation process | |
| CN210688197U (en) | Symmetrical full-heat-storage combustion system | |
| CN220205804U (en) | Probe cooling system is examined to thermal power plant's fire | |
| CN221206799U (en) | Low-energy-consumption ceramic powder preparation equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |