CN213866088U - Gasifier fly ash recirculation system capable of recycling coal gas - Google Patents
Gasifier fly ash recirculation system capable of recycling coal gas Download PDFInfo
- Publication number
- CN213866088U CN213866088U CN202022908158.2U CN202022908158U CN213866088U CN 213866088 U CN213866088 U CN 213866088U CN 202022908158 U CN202022908158 U CN 202022908158U CN 213866088 U CN213866088 U CN 213866088U
- Authority
- CN
- China
- Prior art keywords
- fly ash
- tank
- unit
- gas
- pulverized coal
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model discloses a gasifier flying dust recirculation system that can retrieve coal gas belongs to gasifier technical field. The fly ash lock hopper is connected with the fly ash gas stripping tank, the fly ash lock hopper and the fly ash gas stripping tank are respectively connected with the first exhaust filter, the fly ash gas stripping tank is connected with the fly ash accelerating unit, and the fly ash accelerating unit is connected with the pulverized coal conveying unit; the first exhaust filter is connected with the desulfurization unit, the desulfurization unit is connected with the hot blast stove unit, the hot blast stove unit is connected with the coal grinding drying device, the coal grinding drying device is connected with the second exhaust filter, and the second exhaust filter is respectively connected with the coal powder conveying unit and the hot blast stove unit; the pulverized coal conveying unit is connected with a burner of the gasification furnace. The system can make full use of the fly ash carbon residue and the carried coal gas, improves the utilization rate of energy, and has good application prospect.
Description
Technical Field
The utility model belongs to the technical field of the gasifier, concretely relates to gasifier flying dust recirculation system that can retrieve coal gas.
Background
The coal gasification technology is a core technology for clean and efficient utilization of coal, is a key technology for developing advanced clean coal power generation, coal chemical industry, coal-based poly-generation and other energy systems, and has important influence on the operation reliability and economy of each system. Driven by the rapid development of modern coal chemical engineering projects, coal gasification technology is developing towards large-scale, clean, efficient and wide coal adaptability. The development of coal gasification technology presents a lot of flowers, but in the development process of the high-efficiency clean coal gasification technology at the present stage, a plurality of problems still exist and need to be solved.
In the existing gasification furnace system, coal gas in fly ash is replaced, the fly ash is removed from the air, and the coal gas is removed to a torch. By adopting the measure, on one hand, the fly ash with higher carbon residue content is directly sent out, so that the energy is wasted; on the other hand, the gas carried in the fly ash can not be effectively utilized, and the low-grade gas is burnt by the torch, and the low-grade gas needs to be burnt by the burner, so that the fly ash carbon residue can be wasted due to extra energy, and the gas carried in the fly ash can not be effectively utilized, thereby causing the waste of energy.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a gasifier fly ash recirculation system capable of recycling coal gas, which can make full use of the residual carbon in the fly ash and the coal gas carried thereby, and improve the utilization rate of energy.
The utility model discloses a realize through following technical scheme:
the utility model discloses a gasification furnace fly ash recirculation system capable of recycling coal gas, which comprises a coal gas ash remover, a fly ash storage tank, a fly ash lock hopper, a fly ash gas stripping tank, a first exhaust filter, a desulfurization unit, a hot blast stove unit, a fly ash acceleration unit, a coal grinding drying device, a second exhaust filter and a coal powder conveying unit;
the inlet of the gas ash remover is connected with the waste pot outlet of the gasification furnace, the bottom outlet of the gas ash remover is connected with the fly ash storage tank, the fly ash storage tank is connected with a stamping nitrogen gas inlet pipe, the fly ash storage tank is connected with a fly ash lock hopper, the fly ash lock hopper is connected with a high-pressure nitrogen gas inlet pipe, the fly ash lock hopper is connected with a fly ash gas stripping tank, the fly ash gas stripping tank is connected with a low-pressure nitrogen gas inlet pipe, the fly ash lock hopper and the fly ash gas stripping tank are respectively connected to a first exhaust filter, the fly ash gas stripping tank is connected with a fly ash accelerating unit, and the fly ash accelerating unit is connected with a pulverized coal conveying unit;
the first exhaust filter is connected with the desulfurization unit, the desulfurization unit is connected with the hot blast stove unit, the hot blast stove unit is connected with the coal grinding drying device, the coal grinding drying device is connected with the second exhaust filter, and the second exhaust filter is respectively connected with the coal powder conveying unit and the hot blast stove unit; the pulverized coal conveying unit is connected with a burner of the gasification furnace.
Preferably, the hot blast stove unit comprises a hot blast stove and a hot blast stove circulating fan, the desulfurization unit is connected with a fuel inlet of the hot blast stove, a hot air outlet of the hot blast stove is connected with the coal grinding and drying device, the coal grinding and drying device is connected with the second exhaust filter, a gas outlet of the second exhaust filter is connected with the hot blast stove circulating fan, and the hot blast stove circulating fan is connected with an air inlet of the hot blast stove.
Preferably, the pulverized coal conveying unit comprises a pulverized coal conveying normal-pressure tank, a pulverized coal conveying variable-pressure tank and a pulverized coal conveying high-pressure tank; the inlet of the pulverized coal conveying normal pressure tank is connected with the fly ash accelerating unit and the second exhaust filter respectively, the outlet of the pulverized coal conveying normal pressure tank is connected with the pulverized coal conveying variable pressure tank, the pulverized coal conveying variable pressure tank is connected with a stamping nitrogen gas inlet pipe, the pulverized coal conveying variable pressure tank is connected with the pulverized coal conveying high pressure tank, the pulverized coal conveying high pressure tank is connected with a burner of the gasification furnace, and the pulverized coal conveying high pressure tank is connected with a high-pressure nitrogen gas inlet pipe.
Further preferably, valves are arranged on a connecting pipeline between the fly ash acceleration unit and the pulverized coal conveying normal pressure tank and a connecting pipeline between the second exhaust filter and the pulverized coal conveying normal pressure tank.
Further preferably, valves on a connecting pipeline between the fly ash acceleration unit and the pulverized coal conveying normal pressure tank and a connecting pipeline between the second exhaust filter and the pulverized coal conveying normal pressure tank are connected with a bridging blockage prevention device.
Preferably, the fly ash acceleration unit comprises a fly ash buffer tank and a pressurized nitrogen system, the fly ash buffer tank is connected with the pressurized nitrogen system, a connection pipeline of the fly ash buffer tank and the pressurized nitrogen system is provided with an adjusting valve, an inlet of the fly ash buffer tank is connected with the fly ash gas stripping tank, and an outlet of the fly ash buffer tank is connected with the pulverized coal conveying unit.
Further preferably, the fly ash buffer tank is connected with a fly ash carbon residue on-line detection device, the fly ash carbon residue on-line detection device is connected with a controller, an outlet of the fly ash buffer tank is connected with two branches, one branch is connected with the pulverized coal conveying unit, the other branch is connected with the fly ash bin, valves are arranged on the two branches, and the two valves are respectively connected with the controller.
Further preferably, the valves on the two branches are connected with a bridging blockage preventing device.
Preferably, the first exhaust filter is connected with a back-blown nitrogen buffer tank.
Preferably, the coal gas ash remover adopts a cyclone separator, so that the separation efficiency is high, and the control and the maintenance are simple.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a can retrieve gasifier flying dust recirculation system of coal gas, the synthetic gas that contains ash is exported by the exhaust pot of gasifier through the coal gas ash remover after the separation is handled, gets into flying dust storage tank, flying dust lock bucket and flying dust air stripping jar in proper order, and the coal gas that carries in the flying dust is replaced out, gets into the hot-blast furnace unit as fuel burning after filtration and desulfurization, and the recovered energy reaches energy-conserving purpose. The gas discharged by the second exhaust gas filter is also fully utilized as the inlet air of the hot blast stove unit. The fly ash and the coal powder enter the coal powder conveying unit together, and finally enter a hearth of the gasification furnace through a burner of the gasification furnace to perform combustion circulation again. In addition, the replaced coal gas is used for removing the hot air furnace, the energy consumption of the flame-removing torch burner for burning is saved, and the load of the torch is reduced. The gasifier has reasonable structural design, makes full use of the residual carbon in the fly ash and the coal gas carried in the fly ash, and improves the overall efficiency of the gasifier and the comprehensive utilization rate of energy.
Furthermore, the fly ash from the fly ash accelerating unit enters the pulverized coal conveying normal pressure tank, and a fly ash silo does not need to be arranged independently, so that the system is simplified, and the design, manufacturing and maintenance costs are reduced.
Furthermore, valves are arranged on a connecting pipeline between the fly ash acceleration unit and the coal powder conveying normal pressure tank and a connecting pipeline between the second exhaust filter and the coal powder conveying normal pressure tank, the control system can control the coal powder and the fly ash to intermittently enter the coal powder conveying normal pressure tank, and the automation degree is high.
Furthermore, the bridging and blocking prevention device can prevent fly ash and coal powder from blocking the valve, and the safety and the stability of the system are improved.
Further, the fly ash in the fly ash buffer tank is conveyed through the pressurized nitrogen system, the regulating valve regulates the conveying pressure in real time according to the working condition of the system, the efficiency is improved, and meanwhile the stability of the system is guaranteed.
Furthermore, the residual carbon amount of the fly ash can be detected in real time through the fly ash residual carbon online detection device, when the fly ash residual carbon is high, the fly ash is controlled to enter the pulverized coal conveying unit through the valve, and then the fly ash is combusted and reused; when the carbon residue of fly ash is low, the fly ash is controlled by a valve to enter the fly ash bin to be discharged out of the system as a byproduct. The overall efficiency of the gasification rate is ensured while the energy is reasonably utilized.
Furthermore, the first exhaust filter is connected with a back-blowing nitrogen buffer tank, so that blockage is prevented, and the safety and the stability of the system are improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: the device comprises a gas ash remover 1, a fly ash storage tank 2, a fly ash lock hopper 3, a fly ash gas stripping tank 4, a first exhaust filter 5, a desulfurization unit 6, a fly ash acceleration unit 7, a coal grinding drying device 8, a second exhaust filter 9, a hot-blast stove 10, a hot-blast stove circulating fan 11, a coal powder conveying normal-pressure tank 12, a coal powder conveying pressure-changing tank 13, a coal powder conveying high-pressure tank 14 and a nitrogen back-blowing buffer tank 15.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention:
as shown in fig. 1, it is the utility model discloses a gasifier flying dust recycling system that can retrieve coal gas, including coal gas ash remover 1, flying dust storage tank 2, flying dust lock fill 3, flying dust air stripping jar 4, first exhaust filter 5, desulfurization unit 6, hot-blast furnace unit, flying dust accelerating unit 7, coal grinding drying device 8, second exhaust filter 9 and buggy conveying unit. The coal gas ash remover 1 preferably adopts a cyclone separator.
The inlet of a gas ash remover 1 is connected with the waste boiler outlet of a gasification furnace, the bottom outlet of the gas ash remover 1 is connected with a fly ash storage tank 2, the fly ash storage tank 2 is connected with a stamping nitrogen gas inlet pipe, the fly ash storage tank 2 is connected with a fly ash lock bucket 3, the fly ash lock bucket 3 is connected with a high-pressure nitrogen gas inlet pipe, the fly ash lock bucket 3 is connected with a fly ash gas stripping tank 4, the fly ash gas stripping tank 4 is connected with a low-pressure nitrogen gas inlet pipe, the fly ash lock bucket 3 and the fly ash gas stripping tank 4 are respectively connected to a first exhaust filter 5, and the first exhaust filter 5 is connected with a back-blowing nitrogen buffer tank 15; the fly ash gas stripping tank 4 is connected with a fly ash accelerating unit 7, and the fly ash accelerating unit 7 is connected with a coal powder conveying unit;
The fly ash acceleration unit 7 comprises a fly ash buffer tank and a pressurized nitrogen system, the fly ash buffer tank is connected with the pressurized nitrogen system, a regulating valve is arranged on a connecting pipeline of the fly ash buffer tank and the pressurized nitrogen system, the inlet of the fly ash buffer tank is connected with the fly ash gas stripping tank 4, and the outlet of the fly ash buffer tank is connected with the pulverized coal conveying unit. The fly ash buffer tank is connected with a fly ash residual carbon online detection device, the fly ash residual carbon online detection device is connected with a controller, an outlet of the fly ash buffer tank is connected with two branches, one branch is connected with the pulverized coal conveying unit, the other branch is connected with the fly ash bin, valves are arranged on the two branches, and the two valves are respectively connected with the controller.
The working method of the gasifier fly ash recycling system capable of recycling coal gas comprises the following steps:
the ash-containing synthetic gas enters a gas ash remover 1 from a waste boiler outlet of a gasification furnace and is separated by a gas ash remover 2, the clean synthetic gas is discharged from an upper outlet of the gas ash remover 1, the fly ash enters a fly ash storage tank 2 from a bottom outlet of the gas ash remover 1, the fly ash sequentially enters a fly ash lock bucket 3 and a fly ash gas-stripping tank 4 under the action of stamping nitrogen, the gas carried in the fly ash is replaced and enters a first gas-discharging filter 5 under the action of high-pressure nitrogen and low-pressure nitrogen, a back-blowing nitrogen buffer tank 15 periodically purges the first gas-discharging filter 5, and the particles obtained by filtration return to the fly ash gas-stripping tank 4 and enter a fly ash buffer tank of a fly ash acceleration unit 7 together with the fly ash, and enter a coal powder conveying normal-pressure tank 12 after being accelerated by a pressurized nitrogen system;
filtered coal gas enters a desulfurization unit 6 for desulfurization and then enters a hot blast stove 10 for fuel combustion, hot air produced by the hot blast stove 10 enters a coal grinding drying device 8 as dry air, coal powder enters a second exhaust filter 9 from the coal grinding drying device 8, gas discharged from the second exhaust filter 9 enters the hot blast stove 10 for heating through a hot blast stove circulating fan 11, and the coal powder enters a coal powder conveying normal pressure tank 12 to be mixed with fly ash and then enters a hearth of a gasification furnace through a nozzle of the gasification furnace. The residual carbon amount of the fly ash can be detected in real time through the fly ash residual carbon online detection device, when the fly ash residual carbon is high, the fly ash is controlled to enter the pulverized coal conveying unit through the valve, and then the fly ash is combusted and recycled; when the carbon residue of fly ash is low, the fly ash is controlled by a valve to enter the fly ash bin to be discharged out of the system as a byproduct.
Although some terms are used in the present invention, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the present invention and are to be construed as any additional limitation which is not in accordance with the spirit of the present invention. The above description is only used as an example to further illustrate the content of the present invention, so as to facilitate understanding, but not to represent that the embodiment of the present invention is limited to this, and any technical extension or re-creation according to the present invention is protected by the present invention.
Claims (10)
1. A gasification furnace fly ash recycling system capable of recycling coal gas is characterized by comprising a coal gas ash remover (1), a fly ash storage tank (2), a fly ash lock hopper (3), a fly ash gas stripping tank (4), a first exhaust filter (5), a desulfurization unit (6), a hot blast stove unit, a fly ash acceleration unit (7), a coal grinding drying device (8), a second exhaust filter (9) and a coal powder conveying unit;
the inlet of a gas ash remover (1) is connected with the waste boiler outlet of a gasification furnace, the bottom outlet of the gas ash remover (1) is connected with a fly ash storage tank (2), the fly ash storage tank (2) is connected with a stamping nitrogen gas inlet pipe, the fly ash storage tank (2) is connected with a fly ash lock hopper (3), the fly ash lock hopper (3) is connected with a high-pressure nitrogen gas inlet pipe, the fly ash lock hopper (3) is connected with a fly ash gas stripping tank (4), the fly ash gas stripping tank (4) is connected with a low-pressure nitrogen gas inlet pipe, the fly ash lock hopper (3) and the fly ash gas stripping tank (4) are respectively connected to a first exhaust filter (5), the fly ash gas stripping tank (4) is connected with a fly ash accelerating unit (7), and the fly ash accelerating unit (7) is connected with a pulverized coal conveying unit;
the first exhaust filter (5) is connected with the desulfurization unit (6), the desulfurization unit (6) is connected with the hot blast stove unit, the hot blast stove unit is connected with the coal grinding drying device (8), the coal grinding drying device (8) is connected with the second exhaust filter (9), and the second exhaust filter (9) is respectively connected with the coal powder conveying unit and the hot blast stove unit; the pulverized coal conveying unit is connected with a burner of the gasification furnace.
2. The gasification furnace fly ash recycling system capable of recycling gas as claimed in claim 1, wherein the hot blast furnace unit comprises a hot blast furnace (10) and a hot blast furnace circulating fan (11), the desulfurization unit (6) is connected with a fuel inlet of the hot blast furnace (10), a hot air outlet of the hot blast furnace (10) is connected with the coal grinding and drying device (8), the coal grinding and drying device (8) is connected with the second exhaust filter (9), a gas outlet of the second exhaust filter (9) is connected with the hot blast furnace circulating fan (11), and the hot blast furnace circulating fan (11) is connected with an air inlet of the hot blast furnace (10).
3. The gasifier fly ash recirculation system capable of recycling gas according to claim 1, wherein the pulverized coal conveying unit comprises a pulverized coal conveying atmospheric tank (12), a pulverized coal conveying pressure swing tank (13) and a pulverized coal conveying high pressure tank (14); the inlet of a pulverized coal conveying normal pressure tank (12) is respectively connected with a fly ash accelerating unit (7) and a second exhaust filter (9), the outlet of the pulverized coal conveying normal pressure tank (12) is connected with a pulverized coal conveying variable pressure tank (13), the pulverized coal conveying variable pressure tank (13) is connected with a stamping nitrogen gas inlet pipe, the pulverized coal conveying variable pressure tank (13) is connected with a pulverized coal conveying high pressure tank (14), the pulverized coal conveying high pressure tank (14) is connected with a burner of a gasification furnace, and the pulverized coal conveying high pressure tank (14) is connected with a high pressure nitrogen gas inlet pipe.
4. The gasifier fly ash recirculation system capable of recycling gas according to claim 3, wherein a valve is disposed on a connecting pipeline between the fly ash acceleration unit (7) and the pulverized coal transportation atmospheric tank (12) and a connecting pipeline between the second exhaust filter (9) and the pulverized coal transportation atmospheric tank (12).
5. The gasifier fly ash recirculation system capable of recycling gas according to claim 4, wherein valves on the connecting pipeline between the fly ash acceleration unit (7) and the pulverized coal transportation atmospheric tank (12) and the connecting pipeline between the second exhaust filter (9) and the pulverized coal transportation atmospheric tank (12) are connected with a bridging blockage prevention device.
6. The gasifier fly ash recycling system capable of recycling gas according to claim 1, wherein the fly ash acceleration unit (7) comprises a fly ash buffer tank and a pressurized nitrogen system, the fly ash buffer tank is connected with the pressurized nitrogen system, a connection pipeline of the fly ash buffer tank and the pressurized nitrogen system is provided with a regulating valve, an inlet of the fly ash buffer tank is connected with the fly ash stripping tank (4), and an outlet of the fly ash buffer tank is connected with the pulverized coal conveying unit.
7. The gasifier fly ash recycling system capable of recycling gas as claimed in claim 6, wherein the fly ash buffer tank is connected to an online detection device for fly ash carbon residue, the online detection device for fly ash carbon residue is connected to the controller, the outlet of the fly ash buffer tank is connected to two branches, one branch is connected to the pulverized coal conveying unit, the other branch is connected to the fly ash bin, and both branches are provided with valves, and the two valves are respectively connected to the controller.
8. The gasifier fly ash recirculation system capable of recycling gas as claimed in claim 7, wherein the valves of both branches are connected with a device for preventing bridge formation and blockage.
9. The gasifier fly ash recirculation system capable of recovering gas according to claim 1, wherein a back-blown nitrogen buffer tank (15) is connected to the first exhaust filter (5).
10. The gasifier fly ash recirculation system capable of recovering gas as claimed in claim 1, wherein the gas ash remover (1) is a cyclone separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022908158.2U CN213866088U (en) | 2020-12-07 | 2020-12-07 | Gasifier fly ash recirculation system capable of recycling coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022908158.2U CN213866088U (en) | 2020-12-07 | 2020-12-07 | Gasifier fly ash recirculation system capable of recycling coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213866088U true CN213866088U (en) | 2021-08-03 |
Family
ID=77042203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022908158.2U Active CN213866088U (en) | 2020-12-07 | 2020-12-07 | Gasifier fly ash recirculation system capable of recycling coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213866088U (en) |
-
2020
- 2020-12-07 CN CN202022908158.2U patent/CN213866088U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113154432A (en) | Biomass power generation system and method coupled with coal burner unit | |
| CN110404650B (en) | Coal grinding system and method for safely and efficiently preparing lignite | |
| CN205174413U (en) | Boiler smoke whirlwind separation recycle device | |
| CN109812830A (en) | A kind of biologic grain and coal-fired coupled electricity-generation system and method | |
| CN213866088U (en) | Gasifier fly ash recirculation system capable of recycling coal gas | |
| CN204854246U (en) | Gasification cinder drying equipment and system | |
| CN112391208A (en) | Gasification furnace fly ash recycling system capable of recycling coal gas and working method thereof | |
| CN216639609U (en) | System for overall process comprehensive utilization of stone coal | |
| CN201737956U (en) | Recycling device for gas in blast-furnace charging and uniform-pressure diffusing process | |
| CN104833189A (en) | Gasification coal cinder drying equipment and system | |
| CN105570908B (en) | Method and system for recycling and treating waste | |
| CN209655336U (en) | A kind of biologic grain and coal-fired coupled electricity-generation system | |
| CN104004550A (en) | Purification and dust removal system of dusty coal gas and process method of purification and dust removal system | |
| CN212560337U (en) | Converter primary dry dedusting system for recycling ultra-clean coal gas | |
| CN204404215U (en) | Utilize the system of adjacent stove negative pressure bug dusting warehousing powder | |
| CN105485706A (en) | Boiler smoke cyclone separation recycling device and smoke recycling method thereof | |
| CN109628148B (en) | Biomass gasification system and working process thereof | |
| CN213835180U (en) | Gasification furnace based on fly ash recirculation system | |
| CN214991325U (en) | Fine coal powder recycling system for fine coal pyrolysis | |
| CN110066690A (en) | A kind of system and method for thermal power plant slightly burnt steam pyrolysis coal gas | |
| CN219223356U (en) | Coal gas energy cascade utilization system of submerged arc furnace | |
| CN213066075U (en) | Coupling power generation system for gasifying biomass by using high-temperature flue gas | |
| CN211372384U (en) | Fly ash remelting device for industrial pulverized coal boiler | |
| CN204421035U (en) | A kind of coal-burning boiler reduces discharging transformation smoke processing system | |
| CN216203305U (en) | Low-temperature methanol washing tail gas recycling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |