CN206160180U - Energy transposition cascade utilization explosion -proof type wind powder heating system - Google Patents
Energy transposition cascade utilization explosion -proof type wind powder heating system Download PDFInfo
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- CN206160180U CN206160180U CN201621246485.3U CN201621246485U CN206160180U CN 206160180 U CN206160180 U CN 206160180U CN 201621246485 U CN201621246485 U CN 201621246485U CN 206160180 U CN206160180 U CN 206160180U
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Abstract
The utility model relates to an energy transposition cascade utilization explosion -proof type wind powder heating system, get into pipeline, wind powder discharge pipe, heat sink and heating device including coal pulverizer, a wind, the entry of coal pulverizer and the one end of a wind entering pipeline are linked together, and the export of coal pulverizer is linked together with wind powder discharge pipe's one end, the heat sink sets up on a wind gets into the pipeline, and heating device sets up on wind powder discharge pipe. The utility model discloses can transmit the wind powder mixture for the powder process system to the heat of lower grade heat source to realize that the further intensification of wind powder mixture before getting into the furnace burning is dry, improved the safety and economic of boiler combustion, reduced the formation and the emission of pollutants such as nitrogen oxide, reduced the cold source loss of steam turbine simultaneously or retrieved other waste heats, improved the economic nature of unit operation.
Description
Technical field
The utility model is related to coal-fired power plant's pulverized coal preparation system, more particularly to a kind of energy transposition cascade utilization explosion-proof type wind
Powder heating system.
Background technology
Heat primary air is limited to the heating efficiency of coal dust in coal pulverizer, in order to realize that coal dust is entering boiler combustion
Front abundant intensification drying, it is necessary to increase second level heat-exchanger rig in coal pulverizer outlet wind powder mixture pipeline, in order to overcome
Terminal temperature difference, therewith heat source pressure in steam turbine can only be adopted the to draw gas latent heat of vaporization that even more high pressure draws gas or grade phase
Near thermal source；Because the saturation temperature of extracted steam from turbine is far below the temperature of heat primary air, according to thermodynamic argument, warmed with high
The source coal dust relatively low to temperature carries out first order heating, and with the low-temperature heat source wind powder mixture powder higher to temperature the second level is carried out
Heating, does not meet cascaded utilization of energy principle, therefore the economy of which is not in full use.
For explosion-proof consideration, need to be lowered into by mixing First air in cold wind in the coal pulverizer operation of most coal units
Air temperature of coal pulverizer, so as to reduce the drying capacity to coal dust, reduces the safety and economic benefit of boiler combustion；Together
When, coal pulverizer inlet First air is mixed after cold wind, reduces caloric receptivity of the First air in air preheater, causes exhaust gas temperature liter
Height, boiler efficiency declines.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of for coal-fired power plant's pulverized coal preparation system and by not
Exchange with the energy grade of thermal source and realize that coal pulverizer wind powder is carried out with more low-grade thermal source heats and improve unit safety economy
Property energy transposition cascade utilization explosion-proof type wind powder heating system.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of energy transposition cascade utilization explosion-proof type wind
Powder heating system, including coal pulverizer, First air are into pipeline, wind powder discharge line, heat sink and heater；The coal-grinding
The entrance of machine is connected with the First air into one end of pipeline, the outlet of the coal pulverizer and the wind powder discharge line
One end is connected；The heat sink is arranged on the First air on pipeline, and the heater is arranged on the wind powder
On discharge line.
The beneficial effects of the utility model are：Enter on pipeline in the First air of coal pulverizer inlet and heat sink is set,
First air transfers heat to water and reduces entering coal pulverizer after temperature in heat sink, so as to the wind powder that coal pulverizer is exported is mixed
Compound temperature is reduced；At the same time, the water after heat absorption heats up in heat sink enters the wind powder discharge line of coal pulverizer outlet
On heater, transfer heat to wind powder mixture, realize the heat temperature raising of wind powder mixture；Improving pulverized coal preparation system
While to the heating of wind powder mixture with drying capacity, the heat primary air temperature into coal pulverizer is significantly reduced, so as to aobvious
Work reduces the detonation risk in coal pulverizer, improves pulverized coal preparation system security；Thoroughly avoid the one of coal pulverizer inlet simultaneously
Secondary wind mixes cold wind phenomenon, improves caloric receptivity of the First air in air preheater, so as to significantly reduce the exhaust gas temperature of boiler, carries
High boiler efficiency, improves the thermal efficiency of cycle of unit, realizes significant energy-saving effect.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, also including circulation, the heat sink is First Heat Exchanger, and the heater is changed for second
Hot device, the First Heat Exchanger includes heat exchange outlet, heat exchange import, a wind inlet and First air with second heat exchanger
Outlet a, wind inlet of the First Heat Exchanger is connected with the First air with First air outlet into pipeline, described
Wind inlet of the second heat exchanger and First air outlet are connected with the wind powder discharge line, the First Heat Exchanger
Heat exchange outlet is connected by pipeline with the heat exchange import of second heat exchanger, and the heat exchange import of the First Heat Exchanger passes through
Pipeline is connected with the intake of the circulation, and the heat exchange outlet of second heat exchanger is by pipeline and the circulation
The water return outlet of water system is connected.
Further, the circulation includes turbine low pressure cylinder, low-pressure heater, circulating pump and water supply installation；Institute
The entrance for stating low-pressure heater is connected by pipeline with the outlet of the turbine low pressure cylinder and the outlet of the water supply installation,
The outlet of the low-pressure heater is connected by pipeline with the heat exchange import of the First Heat Exchanger, the entrance of the circulating pump
It is connected with the outlet of second heat exchanger by pipeline, the outlet of the circulating pump is by pipeline and the low-pressure heater
Entrance be connected.
It is using the beneficial effect of above-mentioned further scheme：By above recuperated cycle, can be compared with low-grade heat source
Heat transmission to pulverized coal preparation system wind powder mixture, so as to realize further liter of the wind powder mixture before into hearth combustion
Temperature is dried；First by the heat transfer of grade highest heat primary air to grade it is time high equivalent to extracted steam from turbine saturation temperature
Hot water, goes the coal dust relatively low to temperature to carry out first order heating with the First air after grade is reduced, then with improving after grade
Hot water go the wind powder mixed powder higher to temperature to carry out second level heating, by the exchange of energy grade, effectively realize energy
The cascade utilization of amount, while reducing the cold source energy of steam turbine, also reduces the irreversible heat transfer loss of each heat transfer link,
So as to the entropy for reducing whole system increases, the acting ability of whole system is increased, its result can be just to use more low-grade
The heat source that turbine low pressure cylinder draws gas or therewith the close thermal source of grade exports wind powder mixture as coal pulverizer, effective
While improving boiler combustion safety and economic benefit, reduce pollutant generation and discharge, the thermal efficiency of cycle of unit is improve, realized
Significant energy-saving effect.
Further, the water supply installation is unit condensate system, or boiler waste heat utilization system, or water tank.
Further, the circulation is connected by circulating water line with therrmodynamic system, and the First Heat Exchanger is changed
Hot entrance is connected with one end of the circulating water line.
Further, the First air is connected into the other end of pipeline with the outlet of boiler air preheater.
Further, the other end of wind powder discharge line is connected with the entrance of boiler furnace.
It is using the beneficial effect of above-mentioned further scheme：The First air for being exported to coal pulverizer inlet in boiler air preheater enters
Enter and arrange on pipeline primary heater, while arranging second on the wind powder discharge line that coal pulverizer is exported to boiler furnace entrance
Heater, improves the thermal efficiency of cycle of unit, realizes significant energy-saving effect.
Description of the drawings
Fig. 1 is the utility model overall structure figure.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, coal pulverizer；2nd, First air enters pipeline；21st, First Heat Exchanger；3rd, wind powder discharge line；31st, the second heat exchanger；
4th, circulation；41st, turbine low pressure cylinder；42nd, low-pressure heater；43rd, circulating pump；44th, water supply installation；45th, circulating water pipe
Road.
Specific embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
As shown in figure 1, a kind of energy transposition cascade utilization explosion-proof type wind powder heating system of the present embodiment, including coal pulverizer
1st, First air enters pipeline 2, wind powder discharge line 3, heat sink and heater；The entrance of coal pulverizer 1 is entered with First air
One end of pipeline 2 is connected, and the outlet of coal pulverizer 1 is connected with one end of wind powder discharge line 3；Heat sink is arranged on once
Wind is entered on pipeline 2, and heater is arranged on wind powder discharge line 3；Also include circulation 4, heat sink is first
Heat exchanger 21, heater is the second heat exchanger 31, and the heat exchanger 31 of First Heat Exchanger 21 and second includes heat exchange outlet, heat exchange
The outlet of import, a wind inlet and First air, a wind inlet and the First air outlet of First Heat Exchanger 21 are entered with First air
Enter pipeline 2 to be connected, a wind inlet of the second heat exchanger 31 and First air outlet are connected with wind powder discharge line 3, the
The heat exchange outlet of one heat exchanger 21 is connected by pipeline with the heat exchange import of the second heat exchanger 31, the heat exchange of First Heat Exchanger 21
Import is connected by pipeline with the intake of circulation 4, and the heat exchange outlet of the second heat exchanger 31 is by pipeline and circulation
The water return outlet of water system 4 is connected.
As shown in figure 1, the circulation 4 of the present embodiment includes turbine low pressure cylinder 41, low-pressure heater 42, circulating pump
43 and water supply installation 44；The entrance of low-pressure heater 42 is by the outlet of pipeline and turbine low pressure cylinder 41 and water supply installation 44
Outlet is connected, and the outlet of low-pressure heater 42 is connected by pipeline with the heat exchange import of First Heat Exchanger 21, circulating pump 43
Entrance be connected with the outlet of the second heat exchanger 31 by pipeline, the outlet of circulating pump 43 is by pipeline and low-pressure heater 42
Entrance be connected.
The water supply installation 44 of the present embodiment is unit condensate system, or boiler waste heat utilization system, or water tank；Coal pulverizer
The temperature of 1 outlet wind powder mixture is reduced, and the terminal temperature difference of the second heat exchanger 31 increases therewith, from heat release in the second heat exchanger 31
Return water temperature afterwards is also corresponding relatively low, the backwater is incorporated into the entrance of low-pressure heater 42 of unit, in low-pressure heater 42
Absorb and heated up after the latent heat of vaporization that turbine low pressure cylinder draws gas, in being then re-introduced into the First Heat Exchanger 21 of the entrance of coal pulverizer 1
Continue to heat up and complete whole recuperated cycle.
As shown in figure 1, the circulation 4 of the present embodiment is connected by circulating water line 45 with therrmodynamic system, first changes
The heat exchange entrance of hot device 21 is connected with one end of circulating water line 45.
The First air of the present embodiment is connected into the other end of pipeline 2 with the outlet of boiler air preheater, wind powder discharge pipe
The other end in road 3 is connected with the entrance of boiler furnace.
The present embodiment a kind of energy transposition cascade utilization explosion-proof type wind powder heating system, can with the two-way of particular design or
Multichannel thermal source heat-exchanger rig is engaged, and can constitute flexible system connected mode, realizes the transposition of energy using sharp with step
With.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (7)
1. a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that including coal pulverizer (1), First air
Into pipeline (2), wind powder discharge line (3), heat sink and heater；The entrance of the coal pulverizer (1) with it is described once
Wind enters one end of pipeline (2) and is connected, and the outlet of the coal pulverizer (1) is connected with one end of the wind powder discharge line (3)
It is logical；The heat sink is arranged on the First air on pipeline (2), and the heater is arranged on the wind powder discharge pipe
On road (3).
2. according to claim 1 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that also wrap
Include circulation (4), the heat sink is First Heat Exchanger (21), the heater is the second heat exchanger (31), institute
Stating First Heat Exchanger (21) and second heat exchanger (31) includes heat exchange outlet, heat exchange import, a wind inlet and once
Wind is exported, and a wind inlet and the First air of the First Heat Exchanger (21) are exported and enter pipeline (2) phase with the First air
Connection, a wind inlet of second heat exchanger (31) and First air outlet are connected with the wind powder discharge line (3),
The heat exchange outlet of the First Heat Exchanger (21) is connected by pipeline with the heat exchange import of second heat exchanger (31), described
The heat exchange import of First Heat Exchanger (21) is connected by pipeline with the intake of the circulation (4), and described second changes
The heat exchange outlet of hot device (31) is connected by pipeline with the water return outlet of the circulation (4).
3. according to claim 2 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that described
Circulation (4) includes turbine low pressure cylinder (41), low-pressure heater (42), circulating pump (43) and water supply installation (44)；Institute
The entrance for stating low-pressure heater (42) passes through outlet and the water supply installation (44) of the pipeline with the turbine low pressure cylinder (41)
Outlet be connected, the outlet of the low-pressure heater (42) is by pipeline and the heat exchange import phase of the First Heat Exchanger (21)
Connection, the entrance of the circulating pump (43) is connected by pipeline with the outlet of second heat exchanger (31), the circulating pump
(43) outlet is connected by pipeline with the entrance of the low-pressure heater (42).
4. according to claim 3 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that described
Water supply installation (44) is unit condensate system, or boiler exhaust smoke waste-heat utilization system, or water tank.
5. according to claim 3 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that described
The intake of circulation (4) is connected by circulating water line (45) with therrmodynamic system, the First Heat Exchanger (21)
Heat exchange import is connected with one end of the circulating water line (45).
6. according to claim 1 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that described
First air enters the other end of pipeline (2) and is connected with the outlet of boiler air preheater.
7. according to claim 1 a kind of energy replaces cascade utilization explosion-proof type wind powder heating system, it is characterised in that described
The other end of wind powder discharge line (3) is connected with the entrance of boiler furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246485.3U CN206160180U (en) | 2016-11-15 | 2016-11-15 | Energy transposition cascade utilization explosion -proof type wind powder heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246485.3U CN206160180U (en) | 2016-11-15 | 2016-11-15 | Energy transposition cascade utilization explosion -proof type wind powder heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206160180U true CN206160180U (en) | 2017-05-10 |
Family
ID=58660708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621246485.3U Active CN206160180U (en) | 2016-11-15 | 2016-11-15 | Energy transposition cascade utilization explosion -proof type wind powder heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206160180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388637A (en) * | 2019-07-01 | 2019-10-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of energy-saving type boiler ultra-low load steady combustion system |
| CN113294799A (en) * | 2021-05-27 | 2021-08-24 | 东方电气集团东方锅炉股份有限公司 | Hot primary air and air-powder mixture heat exchange system |
-
2016
- 2016-11-15 CN CN201621246485.3U patent/CN206160180U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388637A (en) * | 2019-07-01 | 2019-10-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of energy-saving type boiler ultra-low load steady combustion system |
| CN113294799A (en) * | 2021-05-27 | 2021-08-24 | 东方电气集团东方锅炉股份有限公司 | Hot primary air and air-powder mixture heat exchange system |
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