CN203431900U - Smoke cooling and air heating device of power station boiler - Google Patents
Smoke cooling and air heating device of power station boiler Download PDFInfo
- Publication number
- CN203431900U CN203431900U CN201320403804.7U CN201320403804U CN203431900U CN 203431900 U CN203431900 U CN 203431900U CN 201320403804 U CN201320403804 U CN 201320403804U CN 203431900 U CN203431900 U CN 203431900U
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- boiler
- smoke
- temperature
- air
- heater
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a smoke cooling and air heating device of a power station boiler. The smoke cooling and air heating device comprises a smoke cooler through pipelines, a water pump, a water tank and an air heater which are connected in sequence, the smoke cooler is further connected with the air heater, and the pipeline between the water pump and the smoke cooler is provided with a flow meter. Circulating media with working temperature ranging from 65 DEG C to 96 DEG C and operating pressure ranging from 0.05MPa to 0.2MPa are arranged inside the pipelines. The water tank is provided with a water supplementation and discharging port. The pipelines are provided with adjustable valves. Power-plant softened water is used as the circulating media. The smoke cooling and air heating device enables part of heat of exhausted smoke of the boiler to be recovered, heat air fed by the boiler, and return back to a combustion device of the boiler. The temperature of the exhausted smoke is lowered, thermal efficiency of the boiler is improved, meanwhile, the temperature of cold air at an inlet of an air pre-heater of the boiler is increased, low-temperature corrosion to a heated surface of the tail portion of the power station boiler is avoided, and operation safety of the boiler is improved. Because the circulating media operate in a certain temperature range, the temperature of the outer wall of the smoke cooler is higher than the dew-point temperature of the smoke all the time, and low-temperature corrosion to the smoke cooler is avoided effectively.
Description
Technical field
The utility model relates to thermal power generating technology field, relates in particular to station boiler cold smoke heater.
Background technology
Discharge smoke temperature of power station boiler is commonplace higher than the imagination of design load at present, and the serious overtemperature of exhaust gas temperature not only affects the economy of power plant, and affects the safe operation of air preheater, deduster and desulphurization plant below.Therefore, reduce exhaust gas temperature and there is important practical significance for security reliability energy-saving and cost-reducing, that improve boiler; While is due to the anxiety of the energy, coal used for station boiler quality generally declines, and especially the general sulfur content higher than design coal of raw coal sulfur content, causes the cold end corrosion of Rear of Utility Boiler heating surface very serious, even have influence on the safe operation of station boiler, prevent that cold end corrosion is very urgent.
For the problem of above two aspects, prior art cannot accomplish that the two takes into account:
As low-pressure coal saver technology, low-pressure coal saver technology is after the part heat recovery of station boiler smoke evacuation, to send into the low pressure air extractor of power plant's thermal device, can effectively reduce exhaust gas temperature, owing to reclaiming heat, not get back to burner, therefore boiler thermal output does not change; Heat enters low pressure air extractor, and due to the thermoelectric conversion efficiency less than 25% of low-pressure steam, thereby this part heat overwhelming majority enters power plant steam turbine condenser and drained.
For another example various steam air heaters, can improve the entrance air temperature of boiler air preheater, effectively avoid the cold end corrosion of heated surface at the end of boiler, raising due to the entrance air temperature of boiler air preheater, thereby cause discharge smoke temperature of power station boiler to rise, reduce boiler economy, and affect air preheater, the safe operation of deduster and desulphurization plant below, in addition, because the heat energy that heats steam air heater is from the our factory's thermal source (as auxiliary steam) outside boiler plant, our factory's thermal source results from the burning of boiler at first, consider transmission and conversion efficiency impossible 100%, therefore less economical.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, a kind of station boiler cold smoke heater is provided, it has the processing of making overall plans, both the heat of recovery was made full use of, improve boiler efficiency, reduce coal consumption, improved again the entrance cold wind temperature of station boiler air preheater, effectively avoided the advantage of the cold end corrosion of heated surface at the end of boiler.
To achieve these goals, the utility model adopts following technical scheme:
A cold smoke heater, comprises the gas cooler, water pump, water tank and the steam air heater that by pipeline, connect successively, and described gas cooler is also connected with steam air heater, and the pipeline of described water pump and gas cooler is provided with flowmeter.
In described pipeline, being provided with operating temperature is 65～96 ℃, the circulatory mediator that operating pressure is 0.05～0.2MPa.
Described water tank is provided with mends dewatering outlet.
On described pipeline, be equipped with adjustable valve.
Described circulatory mediator is used power plant's demineralized water.
Operation principle of the present utility model:
Workflow, power plant's demineralized water enters gas cooler through water pump pressurization, after cooled flue gas heat absorption, enters steam air heater, after heating air-supply heat release, gets back to water tank.By adjust flux, adjust the operating temperature of circulatory mediator, Flow-rate adjustment can regulate by pump rotary speed, and also available adjustable valve completes.The operating temperature of circulatory mediator is 65～96 ℃, and operating pressure is 0.05～0.2MPa (gauge pressure).
This device can make discharge smoke temperature of power station boiler reduce by 25～45 ℃, and air-supply degree can raise 30～50 ℃, improves boiler efficiency 1.3～2.0%.With 334 grams/kW.h of the average net coal consumption rate of current 300MW unit, calculate, can 4～6 grams/kW.h of feast-brand mark coal.If unit year operation 6000 hours, 800 yuan/ton of mark coal prices, year saving is more than 700 ten thousand yuan, is the twice of low-pressure coal saver saving amount.
The beneficial effects of the utility model:
1 this device is simple, and initial cost is little, and the investment payback time is short.Device operating pressure is low, low to material requirements;
2 are provided with benefit dewatering outlet, and device starts, stops maintenance conveniently;
The reserved heat supply outlet of 3 device, docks convenient and swift with heating plant;
4 processing of making overall plans, both made full use of the heat of recovery, improved boiler efficiency, reduced coal consumption, had improved again the entrance cold wind temperature of station boiler air preheater, had effectively avoided the cold end corrosion of heated surface at the end of boiler.
5 concrete running temperatures can be determined according to the sulfur content of boilers of power plants coal, guarantee that the outer wall temperature of gas cooler is not less than the dew point of flue gas.Keep circulatory mediator certain pressure, guarantee that circulatory mediator does not seethe with excitement in gas cooler, guarantee heat transfer effect.
6 combination units that comprise gas cooler and steam air heater, this device can and make full use of the part heat recovery of station boiler smoke evacuation, burner is returned in air-supply by heating boiler, save the coal-fired station boiler thermal efficiency that improves, simultaneously, owing to having improved the entrance cold wind temperature of boiler air preheater, can effectively avoid the cold end corrosion of Rear of Utility Boiler heating surface.
7 circulatory mediators are used power plant's demineralized water, can effectively prevent the fouling and corrosion of gas cooler, steam air heater and pipeline.
Accompanying drawing explanation
Fig. 1 is device connection diagram of the present utility model;
Wherein, 1, gas cooler, 2, flowmeter, 3, water pump, 4, water tank, 5, steam air heater, 6, adjustable valve.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of station boiler cold smoke heater, comprise the gas cooler 1, water pump 3, water tank 4 and the steam air heater 5 that by pipeline, connect successively, described gas cooler 1 is also connected with steam air heater 5, and described water pump 3 is provided with flowmeter 2 with the pipeline of gas cooler 1.
In described pipeline, being provided with operating temperature is 65～96 ℃, the circulatory mediator that operating pressure is 0.05～0.2MPa.
Described water tank 4 is provided with mends dewatering outlet.
On described pipeline, be equipped with adjustable valve 6.
Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present utility model is described; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (4)
1. a station boiler cold smoke heater, is characterized in that, comprises the gas cooler, water pump, water tank and the steam air heater that by pipeline, connect successively, and described gas cooler is also connected with steam air heater, and the pipeline of described water pump and gas cooler is provided with flowmeter.
2. a kind of station boiler cold smoke heater as claimed in claim 1, is characterized in that, in described pipeline, being provided with operating temperature is 65～96 ℃, the circulatory mediator that operating pressure is 0.05～0.2MPa.
3. a kind of station boiler cold smoke heater as claimed in claim 1, is characterized in that, described water tank is provided with mends dewatering outlet.
4. a kind of station boiler cold smoke heater as claimed in claim 1, is characterized in that, on described pipeline, is equipped with adjustable valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403804.7U CN203431900U (en) | 2013-07-08 | 2013-07-08 | Smoke cooling and air heating device of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403804.7U CN203431900U (en) | 2013-07-08 | 2013-07-08 | Smoke cooling and air heating device of power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203431900U true CN203431900U (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320403804.7U Expired - Lifetime CN203431900U (en) | 2013-07-08 | 2013-07-08 | Smoke cooling and air heating device of power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203431900U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949148A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving device of thermal power plant |
| CN105423275A (en) * | 2015-12-17 | 2016-03-23 | 沈阳航空航天大学 | Biomass direct combustion power plant flue gas waste heat utilization system and method |
-
2013
- 2013-07-08 CN CN201320403804.7U patent/CN203431900U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949148A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving device of thermal power plant |
| CN105423275A (en) * | 2015-12-17 | 2016-03-23 | 沈阳航空航天大学 | Biomass direct combustion power plant flue gas waste heat utilization system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220121 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: Shandong Electric Power Research Institute |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: Shandong Electric Power Research Institute Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: Shandong Electric Power Research Institute |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220214 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: Shandong Electric Power Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |