CN103206702A - Energy-saving device - Google Patents
Energy-saving device Download PDFInfo
- Publication number
- CN103206702A CN103206702A CN2013100134938A CN201310013493A CN103206702A CN 103206702 A CN103206702 A CN 103206702A CN 2013100134938 A CN2013100134938 A CN 2013100134938A CN 201310013493 A CN201310013493 A CN 201310013493A CN 103206702 A CN103206702 A CN 103206702A
- Authority
- CN
- China
- Prior art keywords
- energy
- heat exchanger
- primary air
- saving device
- hot primary
- 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.)
- Pending
Links
Images
Landscapes
- Air Supply (AREA)
Abstract
The invention relates to an energy-saving device and belongs to the technical field of thermal power energy-saving devices. The energy-saving device comprises a heat exchanger. The heat exchanger is arranged on a hot primary air channel of an air inlet of a coal mill and connected in a pipeline of a low-voltage heater in series. By installing the heat exchanger on the hot primary air channel of the air inlet of the coal mill, redundant energy in hot primary air is recovered and enters a low-voltage heating system, and an advantage of improving heat energy use rate is achieved. Further improvement of the energy-saving device is that an electric valve connected with the heat exchanger on the hot primary air channel in parallel. According to moisture volume difference in coal powder, when air temperature is required to be increased, the hot primary air is mixed into a coal mill inlet in short-circuit mode, and the coal powder is guaranteed to be fully dried. The temperature of a heat exchanger outlet is slightly higher than design required temperature so that the energy-saving device can meet all working condition requirements and guarantees stable operation of a boiler.
Description
Technical field
The invention belongs to thermoelectricity energy-saving equipment technical field, relate in particular to a kind of energy saver of heat primary air.
Background technology
Current domestic each tame power plant all adopts the method for mixing brown coal in order to reduce the coal price cost that grows to even greater heights in the fire coal.The brown coal mixed ratio of each power plant of various places does not wait 10～40%, and brown coal contain moisture 20～30%, needs water evaporates is come out in pulverizing process, is beneficial to dry coal dust and catches fire at burner hearth.Therefore, heat primary air must satisfy dry minimum temperature requirement, simultaneously for the explosion-proof temperature of also must controlling must not be higher than 280 degree, for guaranteeing the temperature of coal pulverizer air inlet, often adopts and introduce a cold wind in the heat primary air house steward.
Summary of the invention
In order to reduce the quantity of mixing cold wind, improve the integral body generating thermal efficiency of power plant, the technical solution used in the present invention is that a kind of energy saver comprises heat exchanger, described heat exchanger is installed on the heat primary air road of coal pulverizer air inlet, is connected in the pipeline of low-pressure heater.
Energy saver of the present invention, by on the heat primary air road of coal pulverizer air inlet, mounting heat exchanger, unnecessary energy enters the low-pressure heater system in the recovery heat primary air, reaches the beneficial effect that improves the heat energy utilization rate.
Further improve as the present invention, on described heat primary air road, be connected in parallel to motor-driven valve with heat exchanger, according to the difference of moisture in the coal dust, when needs improve wind-warm syndrome, be incorporated into the coal pulverizer import by the control motor-driven valve by the heat primary air short circuit, guarantee that coal dust obtains abundant drying; Described heat exchanger outlet temperature to ensure that energy saver can satisfy all working condition requirements, ensures the stable operation of boiler a little more than the designing requirement temperature.
Description of drawings
Accompanying drawing is the layout schematic diagram of energy saver of the present invention in pipe network.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is made and to further specify.
As shown in the figure, energy saver of the present invention, heat primary air road 1 at coal pulverizer 4 air inlets installs heat exchanger 3 additional, the waste heat that heat exchanger 3 reclaims is connected in the low pressure heating system 5, as preferably, on the heat primary air road, be connected in parallel to motor-driven valve 2 with heat exchanger, calculating shows, design setting is realized 200 ℃ of coal pulverizer 4 import wind-warm syndrome by heat exchanger 3, for coal pulverizer 4 import wind-warm syndrome are brought up to 230 ℃, need open motor-driven valve 2 at the heat exchanger bypass pipeline, allow 22 %, 335 ℃ heat primary air short circuit be incorporated into the coal pulverizer import.
(1) actual operating data and general control method.
| Require change outlet wind-warm syndrome ℃ | 200 | 220 | 226 | 230 | 260 |
| The bypass air quantity accounts for the total blast volume ratio | 0 | 0.148 | 0.19 | 0.22 | 0.444 |
[0011]If the design setting heat exchanger outlet temperature is 200 ℃, need to improve wind-warm syndrome so and just need mix 335 ℃ of bypass hot blasts, when 260 ℃ of heat primary airs of needs, need the heat primary air of short circuit almost near half.Cause many-sided difficulty.
If operating mode is often like this, wind-warm syndrome is set on the high value and is advisable, such as, 230 ℃, change is mixed cold wind or short circuit hot blast all than being easier to up and down, measures little and quick-acting.
(2) the convenient-to-running effect of two-way temperature control, shown in seeing the following form:
Suppose 230 ℃ of design setting coal pulverizer import wind-warm syndrome, the bypass hot blast rate: heat exchanger air quantity=2: 5 can obtain 260 ℃; Mix cold primary air flow 4.9%, can obtain 220 ℃; Mix cold blast rate 9.70%, can get 210 ℃.
Above-mentioned 2 tables carry data declaration, and the reduction value of heat primary air need be selected in conjunction with actual operating mode, is not more low more good, and the demand that improve or reduce wind-warm syndrome for following appearance leaves two-way leeway.
Do not select minimum in the outlet wind-warm syndrome of setting heat exchanger, minimum no doubt obtains maximum energy-saving effect, when coal changes, temperature and load variations round the clock, when needing to improve coal pulverizer import wind-warm syndrome, but be difficult to achieve the goal, in order to ensure that energy saver of the present invention can satisfy all working condition requirements, ensure the stable operation of boiler, heat exchanger outlet temperature is a little more than the designing requirement temperature.
Adopt energy saver of the present invention can reduce even cancel mixing of cold wind, improve the heat exchange efficiency of air preheater; The unnecessary energy of wind is recovered to low-pressure heater, and the response national policy is called, and reaches target for energy-saving and emission-reduction.
The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; should be noted that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. energy saver, it is characterized in that: comprise heat exchanger, described heat exchanger is installed on the heat primary air road of coal pulverizer air inlet, is connected in the pipeline of low-pressure heater.
2. according to the described energy saver of claim 1, it is characterized in that: on described heat primary air road, be connected in parallel to motor-driven valve with heat exchanger.
3. according to claim 1 or 2 described energy savers, it is characterized in that: described heat exchanger outlet temperature is a little more than the designing requirement temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100134938A CN103206702A (en) | 2013-01-15 | 2013-01-15 | Energy-saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100134938A CN103206702A (en) | 2013-01-15 | 2013-01-15 | Energy-saving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103206702A true CN103206702A (en) | 2013-07-17 |
Family
ID=48754014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100134938A Pending CN103206702A (en) | 2013-01-15 | 2013-01-15 | Energy-saving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103206702A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5886303A (en) * | 1981-11-18 | 1983-05-23 | 株式会社 テイエルブイ | Heat exchanger type condensation heat recovery device |
| CN2591047Y (en) * | 2002-12-31 | 2003-12-10 | 中冶集团北京钢铁设计研究总院 | Hot-blast furnace waste gas comprehensive utilizing device |
| CN101709882A (en) * | 2009-12-09 | 2010-05-19 | 西安热工研究院有限公司 | Coal-fired boiler hot primary wind heating system |
| CN201531900U (en) * | 2009-10-13 | 2010-07-21 | 夏学苏 | Industrial furnace low oxygen combustion control device |
| EP2249079A2 (en) * | 2009-04-27 | 2010-11-10 | Interesco S.r.l. | Method and apparatus for improving the efficiency of a heat generator for industrial or domestic use |
| CN201885213U (en) * | 2010-12-10 | 2011-06-29 | 华北电力大学（保定） | Primary air waste heat utilizing device of direct-blowing powder producing system of coal powder boiler |
-
2013
- 2013-01-15 CN CN2013100134938A patent/CN103206702A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5886303A (en) * | 1981-11-18 | 1983-05-23 | 株式会社 テイエルブイ | Heat exchanger type condensation heat recovery device |
| CN2591047Y (en) * | 2002-12-31 | 2003-12-10 | 中冶集团北京钢铁设计研究总院 | Hot-blast furnace waste gas comprehensive utilizing device |
| EP2249079A2 (en) * | 2009-04-27 | 2010-11-10 | Interesco S.r.l. | Method and apparatus for improving the efficiency of a heat generator for industrial or domestic use |
| CN201531900U (en) * | 2009-10-13 | 2010-07-21 | 夏学苏 | Industrial furnace low oxygen combustion control device |
| CN101709882A (en) * | 2009-12-09 | 2010-05-19 | 西安热工研究院有限公司 | Coal-fired boiler hot primary wind heating system |
| CN201885213U (en) * | 2010-12-10 | 2011-06-29 | 华北电力大学（保定） | Primary air waste heat utilizing device of direct-blowing powder producing system of coal powder boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102252339B (en) | System for reducing discharge smoke temperature of power station boiler | |
| CN106051805B (en) | A kind of residual neat recovering system and method using smoke discharging residual heat as steam air heater heat source | |
| CN201885213U (en) | Primary air waste heat utilizing device of direct-blowing powder producing system of coal powder boiler | |
| CN210206361U (en) | High-efficiency volatile organic waste gas treatment and improvement system | |
| CN105180146B (en) | A kind of cogeneration power plant fume afterheat is multistage to reclaim utilization system | |
| CN204460852U (en) | Air source heat pump heat supply and blower fan generate electricity association system | |
| CN204478009U (en) | A kind of low low-temperature flue gas waste heat recovery system | |
| CN203784991U (en) | Hot air recirculating system of coal-fired boiler | |
| CN203687075U (en) | Primary air system of coal mill of thermal power plant | |
| CN101338979B (en) | Steel works sintering cooling machine low-temperature flue gas residual heat utilization system | |
| CN104990063A (en) | Hot primary air waste heat utilization device coupled with air heater system in use | |
| CN212058346U (en) | Flue gas waste heat air mixing device capable of adjusting temperature | |
| CN103206702A (en) | Energy-saving device | |
| CN202813420U (en) | System for raising air temperature of secondary air at inlet of air preheater | |
| CN202692429U (en) | Waterway system of direct thermal circulation type heat pump water heater | |
| CN204962712U (en) | System is used multipurposely in multistage recovery of cogeneration of heat and power power plant flue gas waste heat | |
| CN205191618U (en) | Waste heat utilization system of boiler blow -off | |
| CN210197339U (en) | Combined system for effectively relieving blockage of ammonium bisulfate of air preheater | |
| CN204730177U (en) | Residual heat from boiler fume cascade utilization device | |
| CN204444214U (en) | A kind of waste-heat recovery device | |
| CN201697223U (en) | Waste gas afterheat recovery and heating system | |
| CN113294799A (en) | Hot primary air and air-powder mixture heat exchange system | |
| CN102954460B (en) | Power station boiler energy optimal utilization system | |
| CN207379065U (en) | A kind of air source heat pump host anti-corrosion shell | |
| CN206846868U (en) | Power plant's low calorie heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130717 |