CN100528277C - Apparatus for preventing flue-gas from being washed down for wet chimney of flue-gas desulphurization equipment - Google Patents
Apparatus for preventing flue-gas from being washed down for wet chimney of flue-gas desulphurization equipment Download PDFInfo
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- CN100528277C CN100528277C CNB2005100955371A CN200510095537A CN100528277C CN 100528277 C CN100528277 C CN 100528277C CN B2005100955371 A CNB2005100955371 A CN B2005100955371A CN 200510095537 A CN200510095537 A CN 200510095537A CN 100528277 C CN100528277 C CN 100528277C
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Abstract
An apparatus preventing the down washing of fume and raising the height of low-temp fume for the wet chimney running in fume gas desulfurizing (FGD) system is composed of intelligent controller, intelligent fuel valve, blower, burner, fuel oil/gas delivering pipeline, and wind supplying pipeline. It can decrease the pollution of fume gas to environment.
Description
Technical field
The present invention relates to a kind ofly be used for preventing when wet chimney operation is adopted in flue gas desulphurization system (FGD) device back washing under the flue gas (downwash) or similar field and be used to increase the rising height of low-temperature flue gas or vertical proliferation speed, belong to the technical field of environmental protection equipment to reduce a set of equipment system of flue gas to the pollution level of neighboring area.
Background technology
The literal sense of washing is air-flow deflecting down with respect to the wing direction of motion down.For fired power generating unit, wash under the flue gas be meant when the chimney outlet flow velocity low excessively, under the inversion layer meteorological condition, air-flow is not to the floating diffusion of rising, but is diffused into ground on every side downwards.
After fired power generating unit adopts the FGD system, the flue-gas temperature step-down, humidity uprises, in order to prevent to wash under the flue gas, influence peripheral resident's life, so generally need increase flue gas reheat system (GGH),, promote flue-gas temperature thereby go up largely to improve the flue-gas temperature in exit at the desulphurization system afterbody, increase the discharging rising height, wash under guaranteeing not occur.But GGH is extra cost burden for the FGD system, investment cost height not only, and running resistance (power consumption) is also very high; And itself also face serious etching problem, and increased maintenance cost, workload greatly, reduced the reliability of FGD system, also be one of capital equipment that causes by the FGD disorderly closedown.That is to say, the consideration of the comprehensive method of investment, operation and maintenance cost, in most of the cases, wet flue gas emission scenary (without GGH) has minimum total cost.Therefore, the FGD device of the U.S. since the eighties in last century cancelled GGH mostly, and adopts the technology of wet chimney, and China is also proposing to adopt wet chimney to substitute the requirement of GGH in recent years.But, adopt the wet flue gas discharging, under certain outside meteorological condition, take place to wash phenomenon under the flue gas, this will weaken the diffusion of flue gas, and the resident's of surrounding area living environment is caused great influence.
Summary of the invention
Technical problem: the purpose of this invention is to provide under the anti-flue gas of the wet chimney of a kind of flue gas desulfur device and wash system, this plant investment is few, operating cost is low, makes wet chimney replace GGH to become possibility.
Technical scheme: because in most cases, the probability that occurs the meteorological condition of washing down in 1 year is that very little (concrete probability is different because of the residing meteorology of each fired power generating unit and geographical environment, can quantitative analysis estimate), and wash phenomenon under the flue gas when adopting wet chimney and only can occur at this moment.At these characteristics, the present invention has designed the system of washing under the flue gas of preventing, this system adopts the direct heat release of combustion oil/gas, and the heating low-temperature flue gas guarantees the temperature and the flow velocity of chimney outlet flue gas to stop the generation of washing phenomenon under the flue gas.This system layout is in wet chimney bottom, and is relatively independent with the FGD device.Install after the present invention, the FGD device can fully phase out GGH, reduces investment and operating cost greatly, increases the reliability of system.
Cleaning device is made up of intelligent controller, intelligent fuel valve, blower fan, burner, fuel oil/letter shoot road, air supply line under the anti-flue gas of the wet chimney of flue gas desulfur device of the present invention; Two control ends of intelligent controller connect intelligent fuel valve, blower fan respectively, and the output of intelligent fuel valve joins by fuel oil/letter shoot road and burner, and the output of blower fan joins by air supply line and burner, and burner is arranged in chimney.Intelligent controller realized by an industrial computer, according to meteorology and geographical environment, the determining program of the critical operating mode of washing under the intelligent controller operation flue gas, under wash when being about to take place, send signal to intelligent fuel valve and blower fan.
Operation principle of the present invention and process are: when system judges that meteorology reaches the criticality of washing under the flue gas, this system starts, flow and temperature according to flue gas, the intelligent controller of this invention is made rational judgement, and send signal to burner, flue gas is heated in fuel (fuel oil/gas) burning immediately.Flue gas after the heating is through behind the chimney, and rising height improves, and has avoided washing under the flue gas generation of phenomenon.
Beneficial effect: device 1. of the present invention start and stop flexibly, easy and simple to handle, the investment far below the GGH of flue gas reheat system, can reduce resistance greatly, save power consumption, and security of operation, fault rate is low, maintenance cost is few, guarantees the long-term normal operation of wet chimney with less cost.2. the present invention adopts fuel oil/gas firing as thermal source, compare with steam-heating system, and the energy utilization rate height, system is simple, convenient.3. the device in flue, prevent that dust from stopping up, the wall corrosion all is the problem that heater should be considered, and this invention be can avoid use Steam Heating the time, stifled ash of surface heater and the problem of corroding.4. by optimal control, improve efficiency of combustion to this system; Can judge the critical point of washing under the flue gas according to the various places meteorological condition; Can be an intelligent apparatus system therefore according to the capacity of unit and the required fuel flow rate of temperature decision of flue gas.
Description of drawings
Fig. 1 is a general structure schematic diagram of the present invention.Have among the figure: chimney 1, intelligent controller 2, intelligent fuel valve 3, blower fan 4, burner 5, fuel oil/letter shoot road 6, air supply line 7, combustion flame 8.
The specific embodiment
The present invention is further described below in conjunction with accompanying drawing.
When the FGD device selected wet chimney to move, at chimney outlet, owing to flue-gas temperature step-down, humidity uprise, flue gas vertical proliferation speed reduced, and atmosphere hoist height descends bigger, can take place to wash phenomenon under the plume.
Cleaning device is made up of intelligent controller 2, intelligent fuel 3, blower fan 4, burner 5, fuel oil/letter shoot road 6, air supply line 7 under the anti-flue gas of the wet chimney of flue gas desulfur device of the present invention; Two control ends of intelligent controller 2 connect intelligent fuel valve 3, blower fan 4 respectively, the output of intelligent fuel valve 3 joins with burner 5 by fuel oil/letter shoot road 6, the output of blower fan 4 joins by air supply line 7 and burner 5, and burner 5 is arranged in chimney 1.Intelligent controller 2 realized by an industrial computer, according to meteorology and geographical environment, the determining program of the critical operating mode of washing under the intelligent controller 2 operation flue gases, under wash when being about to take place, send signal to intelligent fuel valve 3 and blower fan 4.
The system of washing is exactly little at the plume rise of wet smoke stack emission under the anti-flue gas of wet chimney of the present invention, starts during the threat that is about to take place to wash down.At first be about to the critical condition that generation is washed down according to the meteorological condition of fired power generating unit region of living in and the physical parameter prediction of FGD system outlet flue gas, under this state, start this system by intelligent controller 2.Intelligent controller 2 obtains sending order to intelligent fuel valve 3 behind the signal, parameters such as wind speed according to the physical parameter and the chimney breast height of flue gas, the definite fuel quantity that will supply with, open the suitable valve aperture as required, under the control of this valve, fuel is delivered directly in the combustion system by fuel oil/letter shoot road 6.Simultaneously, intelligent controller 2 sends order to blower fan 4, and the based on fuel amount is given combustion system by air supply line 7 air feeds.Then, by the burner 5 of a performance optimization, fire fuel, fuel burns rapidly and release heat in chimney 1.This system layout is in the stronger position of flue gas turbulent flow, and like this, the heat that burning produces can discharge rapidly, the flue gas in the chimney is heated to surmount the critical condition of washing under the flue gas.The flow scheme design compactness of whole system, good effect of heat exchange.
The intelligent controller that the present invention relates to can be about to the critical condition that generation is washed down according to the meteorological condition of fired power generating unit region of living in and the physical parameter prediction of FGD system outlet flue gas; The intelligent fuel valve can be according to the parameters such as wind speed of the physical parameter and the chimney breast height of flue gas, determine the fuel quantity that will supply with, and open the suitable valve aperture as required; Burner can be reduced to minimum level to the influence of burning with air-flow in the flue, when because of extraneous bad working environments flame-out situation taking place, can rekindle rapidly.When not moving this system for a long time, burner has the ability that stronger opposing ash is stifled and corrode.
Claims (1)
1. cleaning device under the anti-flue gas of the wet chimney of flue gas desulfur device is characterized in that this device is made up of intelligent controller (2), intelligent fuel valve (3), blower fan (4), burner (5), fuel oil/letter shoot road (6), air supply line (7); Two control ends of intelligent controller (2) connect intelligent fuel valve (3) respectively, blower fan (4), the output of intelligent fuel valve (3) joins by fuel oil/letter shoot road (6) and burner (5), the output of blower fan (4) joins by air supply line (7) and burner (5), burner (5) is arranged in chimney (1), intelligent controller (2) is realized by an industrial computer, according to meteorology and geographical environment, the determining program of the critical operating mode of washing under intelligent controller (2) the operation flue gas, under wash when being about to take place, send signal to intelligent fuel valve (3) and blower fan (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100955371A CN100528277C (en) | 2005-11-23 | 2005-11-23 | Apparatus for preventing flue-gas from being washed down for wet chimney of flue-gas desulphurization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100955371A CN100528277C (en) | 2005-11-23 | 2005-11-23 | Apparatus for preventing flue-gas from being washed down for wet chimney of flue-gas desulphurization equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1792408A CN1792408A (en) | 2006-06-28 |
| CN100528277C true CN100528277C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100955371A Expired - Fee Related CN100528277C (en) | 2005-11-23 | 2005-11-23 | Apparatus for preventing flue-gas from being washed down for wet chimney of flue-gas desulphurization equipment |
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| CN (1) | CN100528277C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278017A (en) * | 2013-05-27 | 2013-09-04 | 中冶北方（大连）工程技术有限公司 | Device preventing diffusing chimney of blower-driven drying segment of grate kiln from condensing |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363540B (en) * | 2013-06-21 | 2016-04-27 | 广东电网公司电力科学研究院 | Intensification afterburning system under a kind of Power Station Boiler in Low Loads runs |
| CN113322103B (en) * | 2021-05-28 | 2024-03-08 | 安庆长宏科技股份有限公司 | Reducing air separation inlet CO of coal gasification device 2 Concentration device |
-
2005
- 2005-11-23 CN CNB2005100955371A patent/CN100528277C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278017A (en) * | 2013-05-27 | 2013-09-04 | 中冶北方（大连）工程技术有限公司 | Device preventing diffusing chimney of blower-driven drying segment of grate kiln from condensing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1792408A (en) | 2006-06-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Granted publication date: 20090819 Termination date: 20101123 |