CN204987057U - Coal pulverizer energy -conservation heat regenerative system that adjusts temperature - Google Patents
Coal pulverizer energy -conservation heat regenerative system that adjusts temperature Download PDFInfo
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- CN204987057U CN204987057U CN201520704066.9U CN201520704066U CN204987057U CN 204987057 U CN204987057 U CN 204987057U CN 201520704066 U CN201520704066 U CN 201520704066U CN 204987057 U CN204987057 U CN 204987057U
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Abstract
The utility model relates to a coal pulverizer energy -conservation heat regenerative system that adjusts temperature, this system are connected with air heater, condensate water water supply mechanism and oxygen -eliminating device respectively, the heat regenerative system include that forced air cooler, cooling water flow control valve, an air regulation control the baffle, a forced air cooler establish in wind channel of bypass heat of air heater export, air regulation control baffle establish on air heater's the female pipe of wind of heat, a forced air cooler one end pass through the cooling water flow control valve and be connected with condensate water water supply mechanism, the other end is connected with the oxygen -eliminating device. Compared with the prior art, the utility model has the advantages of can significantly reduce not through air heater's cold blast rate to increase wind and at the caloric receptivity of air preheater, reduce boiler exhaust gas temperature, reduce the power supply coal consumption of unit.
Description
Technical field
The utility model relates to coal-burning power plant's field of energy-saving technology, especially relates to a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system.
Background technology
As important component part indivisible in boiler combustion system, pulverized coal preparation system should be able to according to the requirement of boiler load, continuously, stable, that adjustably supply burner hearth is up-to-standard coal dust, therefore the operation of coal pulverizer and pulverized coal preparation system and the operation of boiler closely link together, its runnability must consider the requirement of boiler operatiopn, and both runnabilities influence each other, mutually restrict.And in most cases, than coal pulverizer inlet drying medium, air preheater outlet First air temperature requires that temperature is much higher, tradition medium-speed pulverizer unit pulverized-coal system regulates the entrance wind-warm syndrome of coal pulverizer by the mixing of hot and cold First air, this method of operation to air preheater due to bypass part cold First air, decrease the First air total amount by preheater, First air is reduced from the caloric receptivity of flue gas, exhaust gas temperature can be made to raise.
Utility model content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system is provided, the cold blast rate of bypass air preheater can be greatly reduced, thus increase the caloric receptivity of First air at air preheater, reduce exhaust gas temperature, reduce the net coal consumption rate of unit, be mainly applicable to the Thermal generation unit adopting medium-speed pulverizer unit pulverized-coal system.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of coal pulverizer energy-saving temperature-regulating heat regenerative system, this system respectively with air preheater, condensate water water supply mechanism is connected with oxygen-eliminating device, it is characterized in that, described heat regenerative system comprises First air cooler, cooling water flow control valve, air quantity regulable control baffle plate, described First air cooler is located in the bypass heat primary air road of air preheater outlet, described air quantity regulable control baffle plate is located on the female pipe of heat primary air of air preheater, described First air cooler one end is connected with condensate water water supply mechanism by cooling water flow control valve, the other end is connected with oxygen-eliminating device.
Isolating baffle is provided with between described air preheater and bypass heat primary air road.
In the bypass heat primary air road of described First air cooling implement body between air preheater and the female pipe of heat primary air.
Described condensate water water supply mechanism is low-pressure heater outlet condensing water conduit.
Boost in pressure pump is provided with between described low-pressure heater outlet condensing water conduit and cooling water flow control valve.
Be provided with hot blast controllable register between described heat primary air mother pipe and coal pulverizer, between the cold First air mother pipe of described air preheater and coal pulverizer, be provided with cold wind controllable register.
Compared with prior art, the utility model, by application coal pulverizer energy-saving heat regenerative system, is significantly reduced the cold primary air flow of airbypass preheater, makes to be increased by the primary air flow of air preheater, add the caloric receptivity of First air from flue gas, thus reduce existing boiler of power plant exhaust gas temperature; Then enter unit heat regenerative system for heat-setting water by the heat of coal pulverizer energy-saving heat regenerative system recoveries, thus decrease the amount of drawing gas needing to extract from steam turbine, reduce the net coal consumption rate of generating set.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
100, First air cooler, 200, air preheater, 300, bypass heat primary air road, 400, low-pressure heater, 500, oxygen-eliminating device, 600, heat primary air mother pipe, 700, cold once female pipe, V1, cooling water flow control valve, V2, cold wind controllable register, V3, hot blast controllable register, V4, isolating baffle, V5, air quantity regulable control baffle plate, B, elevator pump
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment
See Fig. 1, the coal pulverizer energy-saving heat regenerative system that this example provides is installed in generator unit thermodynamic system, comprises First air cooler 100, cooling water flow control valve V1, air quantity regulable control baffle plate V5.
Wherein, First air cooler 100 is placed in the bypass heat primary air road 300 of boiler air preheater 200 outlet, specifically between boiler air preheater 200 and the female pipe 600 of heat primary air, by regulating V5 controllable register in normal operation, make part or all of heat primary air by bypass heat primary air road 300, directly reduce air preheater 200 by First air cooler 100 like this and export heat primary air temperature, heat primary air temperature t1 can be reduced to t2, to be coordinated with cold wind controllable register V2 by hot blast controllable register V3 again and regulate, heat primary air temperature t2 is reduced to t3, t2 equals or a little more than the drying medium inlet temperature t3 of coal pulverizer requirement.Thus significantly reduce the cold primary air flow of airbypass preheater, reduce existing boiler of power plant exhaust gas temperature.
Simultaneously, the water inlet side of First air cooler 100 also connects coal unit condensate water heat regenerative system, and introduce condensate water as cooling water, the heat reclaimed by First air cooler so then enters unit heat regenerative system for heat-setting water, reduces the net coal consumption rate of generating set.
Concrete, the water inlet side of First air cooler 100 exports condensing water conduit with certain the one-level low-pressure heater 400 in Thermal generation unit low pressure condensate water heat regenerative system and is communicated with, and introduces corresponding unit condensate water as cooling water; Simultaneously the water outlet side of First air cooler 100 is connected with oxygen-eliminating device 500 in Thermal generation unit heat regenerative system, makes the cooling water after absorption heat primary air heat enter into oxygen-eliminating device 500 through First air cooler 100 like this.
For the cooling water being taken from unit condensate system, adopt the water outlet of which rank of low-pressure heater 400 as cooling water, specifically determine according to water supply heat back system.
Cooling water flow control valve V1 in native system is arranged on the connected loop between First air cooler and coal unit low pressure heat regenerative system, is specifically arranged in cooling water and enters on the passage of First air cooler 100.The cooling water flow flowing through First air cooler 100 can be regulated like this by this cooling water flow control valve V1.
On the basis of such scheme, this example provides further prioritization scheme, enters on the passage in First air cooler 100 be also provided with a boost in pressure pump B at cooling water.This boost in pressure pump B specifically exports between feedwater piping at cooling water flow control valve V1 and corresponding feedwater low-pressure heater 400, pressure and the speed of the cooling water entered in First air cooler 100 can be ensured by boost in pressure pump B further, thus ensure the accuracy that cooling water flow control valve V1 controls.
As an example, when adopting the Thermal generation unit application native system of medium-speed pulverizer unit pulverized-coal system, require to install bypass heat primary air road 300 additional in the outlet of boiler air preheater 200 according to such scheme, and First air cooler 100 is installed therein, then from unit condensate system, cooling water is introduced, absorb heat primary air heat, and on the female pipe of heat primary air, air quantity regulable control baffle plate V5 is installed.
The cooling water flow flowing through First air cooler 100 is regulated by cooling water flow control valve V1, cooling water flow is controlled in suitable scope, controlled the heat primary air temperature t2 of the female pipe of First air cooler 100 downstream heat First air by air quantity regulable control baffle plate V5.If First air cooler downstream heat First air temperature t2 requires temperature t3 higher than the entrance drying medium of all coal pulverizers, then turn down air quantity regulable control baffle plate V5, increase the air quantity by bypass heat primary air road, reduce female pipe heat primary air temperature; If First air cooler downstream heat air temperature t2 requires temperature t3 lower than the entrance drying medium of certain coal pulverizer, then open Wind Volume regulable control baffle plate V5, be reduced by the air quantity in bypass heat primary air road, improve female pipe heat primary air temperature.
First air cooler is installed and significantly can reduces exhaust gas temperature, especially for using low moisture coal, the unit that pulverized coal preparation system drying capacity surplus capacity is large, energy-saving effect is particularly evident, energy-saving potential is larger, and be applicable to all medium-speed pulverizer unit pulverized-coal systems, practical.
Meanwhile, First air cooler is arranged in the bypass heat primary air road of air preheater outlet, and surrounding work medium is the hot-air containing a small amount of dust, compared with flue gas cryocooler, there is not burn into wearing and tearing and dust-proof problem.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. a coal pulverizer energy-saving temperature-regulating heat regenerative system, this system respectively with air preheater (200), condensate water water supply mechanism is connected with oxygen-eliminating device (500), it is characterized in that, described heat regenerative system comprises First air cooler (100), cooling water flow control valve (V1), air quantity regulable control baffle plate (V5), described First air cooler (100) is located in the bypass heat primary air road (300) that air preheater (200) exports, described air quantity regulable control baffle plate (V5) is located on heat primary air mother's pipe (600) of air preheater (200), described First air cooler (100) one end is connected with condensate water water supply mechanism by cooling water flow control valve (V1), the other end is connected with oxygen-eliminating device (500).
2. a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system according to claim 1, is characterized in that, is provided with isolating baffle (V4) between described air preheater (200) and bypass heat primary air road (300).
3. a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system according to claim 1, it is characterized in that, described First air cooler (100) is specifically positioned at air preheater (200) and the female bypass heat primary air road (300) of managing between (600) of heat primary air.
4. a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system according to claim 1, is characterized in that, described condensate water water supply mechanism is low-pressure heater (400) outlet condensing water conduit.
5. a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system according to claim 4, it is characterized in that, between described low-pressure heater (400) outlet condensing water conduit and cooling water flow control valve (V1), be provided with boost in pressure pump (B).
6. a kind of coal pulverizer energy-saving temperature-regulating heat regenerative system according to claim 1, it is characterized in that, be provided with hot blast controllable register (V3) between described heat primary air mother's pipe (600) and coal pulverizer, between cold First air mother's pipe (700) of described air preheater (200) and coal pulverizer, be provided with cold wind controllable register (V2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520704066.9U CN204987057U (en) | 2015-09-11 | 2015-09-11 | Coal pulverizer energy -conservation heat regenerative system that adjusts temperature |
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| CN201520704066.9U CN204987057U (en) | 2015-09-11 | 2015-09-11 | Coal pulverizer energy -conservation heat regenerative system that adjusts temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238070A (en) * | 2016-03-28 | 2017-10-10 | 宝山钢铁股份有限公司 | Combined low-level (stack-gas) economizer system |
| CN111359765A (en) * | 2020-04-17 | 2020-07-03 | 西安热工研究院有限公司 | System for improving flexibility of temperature regulation of outlet of coal mill |
-
2015
- 2015-09-11 CN CN201520704066.9U patent/CN204987057U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238070A (en) * | 2016-03-28 | 2017-10-10 | 宝山钢铁股份有限公司 | Combined low-level (stack-gas) economizer system |
| CN111359765A (en) * | 2020-04-17 | 2020-07-03 | 西安热工研究院有限公司 | System for improving flexibility of temperature regulation of outlet of coal mill |
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