CN202018186U - System using boiler flue gas waste heat for drying brown coal - Google Patents
System using boiler flue gas waste heat for drying brown coal Download PDFInfo
- Publication number
- CN202018186U CN202018186U CN2011200834062U CN201120083406U CN202018186U CN 202018186 U CN202018186 U CN 202018186U CN 2011200834062 U CN2011200834062 U CN 2011200834062U CN 201120083406 U CN201120083406 U CN 201120083406U CN 202018186 U CN202018186 U CN 202018186U
- Authority
- CN
- China
- Prior art keywords
- brown coal
- flue gas
- coal drying
- waste heat
- boiler
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The utility model belongs to the technical field of boiler energy conservation and brown coal drying, and particularly relates to a system using boiler flue gas waste heat for drying brown coal. A part of high-temperature flue gas at an economizer outlet enters an air preheater, another part of the high-temperature flue gas enters a brown coal drying drum through a drying system bypass to dry the brown coal, partial boiler flue gas waste heat is used as a heat source for a brown coal drying system, partial flue gas waste heat is recycled, and flue gas at an outlet of the brown coal drying drum enters an electrostatic dust collector after being mixed with flue gas at an outlet of the air preheater. A bypass shutoff damper is arranged between the economizer outlet and an inlet of the brown coal drying drum and used for splitting the brown coal drying system, and a bypass modulation damper is arranged between the outlet of the brown coal drying drum and the electrostatic dust collector and used for modulating the quantity of the flue gas passing the brown coal drying drum. The system uses the partial boiler flue gas waste heat for drying the brown coal, thereby achieving the purposes of energy conservation and emission reduction of the brown coal drying system.
Description
Technical field
The utility model belongs to boiler energy-saving and brown coal drying technical field, is specifically related to a kind of system that utilizes the dry brown coal of residual heat from boiler fume.
Background technology
About about 120-140 ℃, flue gas loss is the heat loss of pulverized-coal fired boiler maximum up to 6-7% to the exhaust gas temperature of conventional power plant pulverized-coal fired boiler greatly.Moisture is one of notable attribute of brown coal, also is to influence it to use one of most important parameter.Tradition brown coal drying system needs special-purpose hot-blast stove to produce dry flue gas, consumes a large amount of energy.
Summary of the invention
At the problems referred to above, the utility model provides a kind of system that utilizes the dry brown coal of residual heat from boiler fume.
The technical solution adopted in the utility model is as follows:
The economizer exhanst gas outlet is divided into two-way: the one road inserts air preheater, and another road enters the brown coal drying cylinder through drying system bypass flue, utilizes the thermal source of boiler partial fume waste heat as the brown coal drying system, the recovery section fume afterheat; The export pipeline of brown coal drying cylinder is communicated with the inlet that electrostatic precipitator is inserted in the back with the export pipeline of air preheater.
Between described economizer exit and the brown coal drying cylinder inlet bypass shutoff damper is set, is used for the brown coal drying system sectionalizing.
On the pipeline between described brown coal drying drum outlet and the electrostatic precipitator bypass controllable register is set, is used to adjust exhaust gas volumn by the brown coal drying cylinder.
The utility model compared with prior art has following characteristics:
(1) the brown coal drying agent is an economizer rear section flue gas, can be under the prerequisite that does not influence boiler operatiopn, and the partially recycled residual heat from boiler fume that utilizes replaces the conventional pulverized-coal hot-blast stove, saves the fuel consumption of equipment investment and hot-blast stove.
(2) the drying drum exhanst gas outlet exports with air preheater and enters the boiler electrostatic precipitator after flue gas mixes, and exhaust gas temperature reduces can improve electrostatic precipitation efficient.
(3) the flue gas resistance partial offset that the drying system resistance that increases and the air preheater of not flowing through reduce of flowing through, the boiler induced-draft fan allowance can overcome the flue gas resistance of increase, saves investment of drying system Fan Equipment and power consumption.
(4) the brown coal drying agent is an air preheater rear section flue gas, and its main component is carbon dioxide, sulfur dioxide, nitrogen, water vapour and minor amounts of oxygen, can effectively prevent brown coal generation spontaneous combustion, guarantees the drying system safe operation.
(5) the drying drum exit gas temperature can be saved equipment investment and the operation power consumption of GGH near boiler desulfurization system optimum temperature.
(6) drying drum outlet flue gas carries moisture increases, and can reduce the water consumption of boiler flue gas desulfurization device.
(7) can change the exhaust gas volumn of passing through the brown coal drying cylinder by gas proportioning damper, the brown coal drying system is simple, moves easy to adjust.
(8) can under the prerequisite that does not influence the normal operation of boiler, realize the maintenance of system by the flue gas shutoff damper with the brown coal drying system sectionalizing.
Description of drawings
Fig. 1 is a system schematic of the present utility model.
Number in the figure:
The 1-economizer; The 2-air preheater; 3-brown coal drying cylinder; 4-bypass controllable register; 5-bypass shutoff damper; The 6-electrostatic precipitator; The 7-air-introduced machine; The 8-booster fan; The 9-desulfurizing tower; The 10-chimney.
The specific embodiment
The utility model provides a kind of system that utilizes the dry brown coal of residual heat from boiler fume, below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described.
As shown in Figure 1, the high-temperature flue gas part of economizer 1 outlet enters air preheater 2, another part enters brown coal drying cylinder 3 dry brown coal through drying system bypass flue, utilizes the thermal source of boiler partial fume waste heat as the brown coal drying system, the recovery section fume afterheat; The flue gas of brown coal drying cylinder 3 outlet mixes the laggard electrostatic precipitator 6 of going into the flue gas that air preheater 2 exports, enter chimney 10 by air-introduced machine 7, booster fan 8, desulfurizing tower 9 then.Between economizer 1 outlet and brown coal drying cylinder 3 inlets, bypass shutoff damper 5 is set, is used for the brown coal drying system sectionalizing.On the pipeline between 3 outlets of brown coal drying cylinder and the electrostatic precipitator 6, bypass controllable register 4 is set, is used to adjust exhaust gas volumn by the brown coal drying cylinder.Can be under the prerequisite that does not influence boiler operatiopn, the brown coal drying system is stopped transport and operation such as maintenance.
Claims (3)
1. system that utilizes the dry brown coal of residual heat from boiler fume, it is characterized in that the economizer exhanst gas outlet is divided into two-way: the one road inserts air preheater, and another road enters the brown coal drying cylinder through drying system bypass flue; The export pipeline of brown coal drying cylinder is communicated with the inlet that electrostatic precipitator is inserted in the back with the export pipeline of air preheater.
2. according to the right 1 desired system that utilizes the dry brown coal of residual heat from boiler fume, it is characterized in that, between described economizer exit and the brown coal drying cylinder inlet bypass shutoff damper is set.
3. according to the right 1 desired system that utilizes the dry brown coal of residual heat from boiler fume, it is characterized in that, on the pipeline between described brown coal drying drum outlet and the electrostatic precipitator bypass controllable register is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200834062U CN202018186U (en) | 2011-03-25 | 2011-03-25 | System using boiler flue gas waste heat for drying brown coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200834062U CN202018186U (en) | 2011-03-25 | 2011-03-25 | System using boiler flue gas waste heat for drying brown coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202018186U true CN202018186U (en) | 2011-10-26 |
Family
ID=44811855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200834062U Expired - Fee Related CN202018186U (en) | 2011-03-25 | 2011-03-25 | System using boiler flue gas waste heat for drying brown coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202018186U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564084A (en) * | 2012-03-14 | 2012-07-11 | 煤炭工业济南设计研究院有限公司 | Low-temperature waste-heat coal slime drying device |
| CN102661661A (en) * | 2012-05-30 | 2012-09-12 | 西安交通大学 | Smoke residual heat utilization system in doped burning biomass power plant |
| CN102679706A (en) * | 2012-05-10 | 2012-09-19 | 山东电力工程咨询院有限公司 | Furnace smoke extraction lignite drying system of direct-blowing pulverizing system of double-inlet and double-outlet steel ball coal mill |
| CN104197343A (en) * | 2014-08-29 | 2014-12-10 | 华北电力大学 | Oxygen-enriched combustion recycle flue gas catalytic desulfurization system and method |
| CN104775933A (en) * | 2015-04-09 | 2015-07-15 | 山东电力工程咨询院有限公司 | Afterheat cascaded utilization system of electricity generating internal combustion engine |
-
2011
- 2011-03-25 CN CN2011200834062U patent/CN202018186U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564084A (en) * | 2012-03-14 | 2012-07-11 | 煤炭工业济南设计研究院有限公司 | Low-temperature waste-heat coal slime drying device |
| CN102679706A (en) * | 2012-05-10 | 2012-09-19 | 山东电力工程咨询院有限公司 | Furnace smoke extraction lignite drying system of direct-blowing pulverizing system of double-inlet and double-outlet steel ball coal mill |
| CN102661661A (en) * | 2012-05-30 | 2012-09-12 | 西安交通大学 | Smoke residual heat utilization system in doped burning biomass power plant |
| CN104197343A (en) * | 2014-08-29 | 2014-12-10 | 华北电力大学 | Oxygen-enriched combustion recycle flue gas catalytic desulfurization system and method |
| CN104775933A (en) * | 2015-04-09 | 2015-07-15 | 山东电力工程咨询院有限公司 | Afterheat cascaded utilization system of electricity generating internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203533526U (en) | Waste-heat utilization system ensuring lignite boiler dry output and SCR safe smoke temperature | |
| CN204395778U (en) | A kind of ultra-clean exhaust system for fluidized-bed combustion boiler | |
| CN202177093U (en) | Multi-level efficient displacement type fume waste-heat utilization system | |
| CN203177151U (en) | Boiler flue gas waste heat recycling system with improved structure | |
| CN202018186U (en) | System using boiler flue gas waste heat for drying brown coal | |
| CN103604116A (en) | Device and method for reducing oxynitrides smoke product of circulating fluidized bed boiler | |
| CN105570883A (en) | Flue gas recirculation-based wide load-wide coal deep denitrification system for CFB (circulating fluidized bed) boiler | |
| CN204438718U (en) | Residual heat from boiler fume drying brown coal system and boiler smoke system | |
| CN103486566A (en) | Waste heat utilization system capable of guaranteeing lignite boiler dry output and SCR safe flue gas temperature | |
| CN203595119U (en) | Device capable of reducing nitric oxides in flue gas product of circulating fluidized bed boiler | |
| CN204404213U (en) | A kind of power station brown coal fluidized bed drying system saving desulfurizing tower water consumption | |
| CN103032867A (en) | Multilevel efficient replaceable type smoke waste heat using system | |
| CN203771439U (en) | High-moisture lignite medium speed mill coal pulverizing system using pulverized coal combustion heating primary air | |
| CN205717147U (en) | A kind of full load denitration utilizes and air preheater corrosion-and blocking-prevention coupled system with fume afterheat | |
| CN204534555U (en) | A kind of flue gas recirculation device for reducing NO_x formation | |
| CN204395745U (en) | A kind of clean exhaust system for fluidized-bed combustion boiler | |
| CN202056856U (en) | System for recycling afterheat of flue gas through high-temperature coal economizer | |
| CN203731456U (en) | Boiler flue gas temperature rise device for thermal generator unit | |
| CN202993536U (en) | Coal-fired hot blast furnace set with waste heat boiler | |
| CN202692019U (en) | Flue gas waste heat recycling system of steam boiler | |
| CN202203970U (en) | Secondary energy saving and utilizing device for furnace exhaust gas waste heat | |
| CN106765035A (en) | Improve SCR temperature of reactor system and device and method | |
| CN203099790U (en) | 600 MW supercritical circulating fluid bed boiler system provided with external heat exchanger | |
| CN204730177U (en) | Residual heat from boiler fume cascade utilization device | |
| CN109114583B (en) | Flue gas waste heat utilization system of coal-fired power plant and working method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20140325 |