CN102192498A - Method of flue gas separation and depressurization as well as flue-returning and burning - Google Patents
Method of flue gas separation and depressurization as well as flue-returning and burning Download PDFInfo
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- CN102192498A CN102192498A CN 201010127207 CN201010127207A CN102192498A CN 102192498 A CN102192498 A CN 102192498A CN 201010127207 CN201010127207 CN 201010127207 CN 201010127207 A CN201010127207 A CN 201010127207A CN 102192498 A CN102192498 A CN 102192498A
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Abstract
The invention discloses a method of flue gas separation and depressurization as well as flue-returning and burning. The method is characterized in that through the linkage of a method of flue gas separation and depressurization, a method of air exchanging and a method of flue-returning and burning, the flue gas is expelled to enter an isolating device and an isolating chamber with greater resistance after the flue gas is supercharged through a first draught fan, thus the energy is lost and the gas diffuses, the partial pressure of the flue gas is reduced, the gas and dust are separated, and unburned CO and various harmful gases are cycled; the recycled flue gas is mixed with fresh air for a second time through the method of air exchanging, and a recurrent state of flue-returning and burning is formed under the effect of a second draught fan; and under the effect of a third draught fan, a small amount of evaporation flue gas is recycled when at an intervallic smoldering fire state, and a slow smoldering fire oxidation process is formed. Through the method of flue gas separation and depressurization as well as flue-returning and burning, the emission of greenhouse gases is reduced greatly.
Description
Technical field
The present invention relates to a kind of method that flue gas separates step-down that is used for, refer in particular to a kind of flue gas separation step-down and return the cigarette combustion method.
Background technology
In recent years, pollute, reduce CO, CO in order to prevent and treat ambient air effectively
2, SO
2And NO
XDeng discharging, smoke abatement and dust control and combustion technology broad development.Report as Chinese environmental and just to publish a kind of outlet flue in the 4051st phase the 3rd edition electrostatic precipitation is set earlier in combustion system, flue gas is carried out pre-dedusting, entered again in the semi-dry desulphurization system that communicates therewith through the flue gas behind this deduster, the flue gas behind the desorption enters in the atmosphere behind sack cleaner again.And for example: in " boiler ABC " book of publishing in nineteen eighty-three by scientific and technical literature publishing house Chongqing branch, the 164th～200 page is just published multinomial combustion technology and method, the technical scheme that wherein is stated from 196～197 pages " smoke evacuation recycle burning method " discloses and has connect one time smoke pipe at the chimney place, the partial fume and the air that chimney are entered atmosphere mix, and send into the inhibition NO that right burning temperature is descended then
XMeasure.But said method is owing to be subjected to recycling the restriction of sending into position and circulating ratio of smoke evacuation, and its effect is not very good.But a kind of smoke abatement and dust control of research and design, reduce noxious gas emission, the reduction of discharging combustion technology of effectively preventing and treating the ambient air pollution accords with the demands of the market, and it not only can overcome the existing shortcoming that reduces discharging combustion technology, the boiler operatiopn cost is reduced, and energy-saving effect is more remarkable.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of flue gas separation step-down and returns the cigarette combustion method, this combustion method is by separation and step-down to flue gas, flue dust is separated with flue gas (comprising CO), reduced the dividing potential drop of cigarette, and form back the recurrent state of cigarette burning.
The technical problem to be solved in the present invention is realized by following scheme: a kind of flue gas separates step-down and returns the cigarette combustion method, it is characterized in that: the flue gas of combustion furnace is introduced to first air-introduced machine, be discharged to booster by outlet flue again, the inlet pressure of smoke pipe equals the booster internal pressure, outlet pressure is greater than the booster internal pressure, flue gas obstructing instrument and air lock in flows by step-down after being increased 0.5 table atmospheric pressure at least, flue gas feeds the air device for interchanging that the air lock adjacent is provided with again then, owing to have cold and hot respiratory exchange mouth on the air device for interchanging, the air of high-temperature flue gas and environment temperature exchanges, flue gas after the cooling is arranged on second air-introduced machine of air device for interchanging outlet again and introduces in the stove from the mouth that advances of above-mentioned combustion furnace, form back cigarette burn cycle state, when burning is out of service, combustion furnace enters property smouldering fire state at interval, the 3rd air-introduced machine of peripheral hardware then enters the flue gas recovery operation state during the smouldering fire, this moment is owing to the upper smoke tube in the 3rd air-introduced machine is connected with the outlet of combustion furnace, another port is connected with obstructing instrument, make a small amount of evaporation flue gas of smouldering fire state in the combustion furnace obtain reclaiming, form smouldering fire oxidizing process slowly.
Advantage of the present invention is: separate the interlock of voltage drop method and air exchange method and time cigarette firing method by flue gas, when forcing flue gas to pass through intake resistance is bigger after the first air-introduced machine supercharging obstructing instrument and air lock, cause the diffusion of energy loss and gas, reduced the dividing potential drop of flue gas, make bring about the desired sensation, dirt obtains separating, Ran CO and various pernicious gas do not obtain recovery; The flue gas that reclaims mixes with new air secondary by the method that air exchanges, and forms back the recurrent state of cigarette burning under the effect of second air-introduced machine; Under the effect of the 3rd air-introduced machine, a small amount of evaporation flue gas is reclaimed during the property smouldering fire state of interval, forms smouldering fire oxidizing process slowly, has significantly reduced the discharging of greenhouse gases.This reduction of discharging combustion technology makes the boiler operatiopn cost reduce the energy-saving effect highly significant.
Description of drawings
Fig. 1 is a burning schematic flow sheet of the present invention
The specific embodiment
As shown in Figure 1, first air-introduced machine 1 is made up of blower fan, aspiration channel and ajutage; Booster 2 is made up of smoke pipe and vessel; Smoke pipe stretches into the diverse location in the vessel, and the inlet pressure of smoke pipe equals the total head of first air-introduced machine 1, and its outlet pressure is greater than 0.5 of the body pressure of container more than the atmospheric pressure, and its shape can be any desirable shape.Obstructing instrument 3 and air lock 4 are a kind of dropping equipments that separate among the present invention, are connected with booster 2.The body inner-use clapboard of obstructing instrument 3 is separated by, also circulation mutually, and its body shape can be any desirable shape, can be monomer, also can be that many bodies are formed.Air lock 4 is a brick mix structure, its indoor partition wall is shelved and circulation mutually, and can be one also can be a plurality of compositions, and it can be arranged at more than the ground also can be arranged at below ground, it can be any desirable form that its body is constructed, as turriform, multi-story shape or labyrinth type etc.Air device for interchanging 5 is arranged at the exit of air lock 4, is connected with aspiration channel, has cold and hot gas exchange mouth on its body, and its shape can be any desirable shape, and it can be a steel construction, also can be brick mix structure.
As shown in Figure 1, second air-introduced machine 6 is provided with aspiration channel and ajutage, and wherein aspiration channel is connected with the outlet of air device for interchanging 5, and ajutage communicates with combustion furnace 7 air inlets.The 3rd air-introduced machine 8 is arranged at the adjacent of second air-introduced machine 6.The upper smoke tube that the 3rd air-introduced machine 8 is provided with is connected with the outlet of combustion furnace 7, and another port is connected with obstructing instrument 3.
As shown in Figure 1, when first air-introduced machine 1 was in running order, the total head of sending the pressure of smoke pipe to equal air-introduced machine was because its smoke pipe stretches in the body of booster 2, send smoke pipe and booster 2 bodies to form pressure reduction this moment, guaranteed the normal operation of first air-introduced machine 1.When the high-temperature flue gas of 250 ℃ of media flows in the body of obstructing instrument 3, under the cooling effect of outside air, formed heat exchange, the temperature of flue gas drops between 80-100 ℃, and the coefficient of expansion of flue gas reduces, and has reduced the dividing potential drop of cigarette.Under the drag effect of obstructing instrument 3 and air lock 4, the kinetic energy of flue gas stream changes, and along with the increase of flow of flue gas resistance, its energy loss further strengthens, and has reduced the dividing potential drop of cigarette, and the separation that helps not fire CO is reclaimed.After above-mentioned flue gas is through the separation step-down, rise and flow in the body of air device for interchanging 5, the flue-gas temperature of this moment has dropped between 60-65 ℃, the gas of two kinds of different mediums forms convection current at the opening part of air device for interchanging 5, becoming a kind of new air and exchange mode, is not fire CO to obtain the secondary mixing.Deflected from by second air-introduced machine 6 when mist rises, the mist in deflecting from is sent into the air inlet of combustion furnace 7 by the air-supply smoke pipe, makes it to form back the recurrent state that cigarette burns.When the burning of combustion furnace 7 is out of service, enter property smouldering fire state at interval, the 3rd air-introduced machine 8 enters the flue gas recovery operation state during the smouldering fire simultaneously, and a small amount of evaporation flue gas of this smouldering fire state obtains reclaiming, and forms the smouldering fire oxidizing process of slow property, reaches CO, CO
2, SO
2Deng the reduction of discharging purpose.
Claims (1)
1. the cigarette combustion method is returned in a flue gas separation step-down, it is characterized in that: the flue gas of combustion furnace is introduced to first air-introduced machine, be discharged to booster by outlet flue again, flue gas obstructing instrument and air lock in flows by step-down after being increased 0.5 table atmospheric pressure at least, flue gas feeds the air device for interchanging that the air lock adjacent is provided with again then, owing to have cold and hot respiratory exchange mouth on the air device for interchanging, the air of high-temperature flue gas and environment temperature exchanges, flue gas after the cooling is arranged on second air-introduced machine of air device for interchanging outlet again and introduces in the stove from the mouth that advances of above-mentioned combustion furnace, form back cigarette burn cycle state, when burning is out of service, combustion furnace enters property smouldering fire state at interval, the 3rd air-introduced machine of peripheral hardware then enters the flue gas recovery operation state during the smouldering fire, this moment is owing to the upper smoke tube in the 3rd air-introduced machine is connected with the outlet of combustion furnace, another port is connected with obstructing instrument, makes a small amount of evaporation flue gas of smouldering fire state in the combustion furnace obtain reclaiming, and forms smouldering fire oxidizing process slowly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010127207 CN102192498A (en) | 2010-03-19 | 2010-03-19 | Method of flue gas separation and depressurization as well as flue-returning and burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010127207 CN102192498A (en) | 2010-03-19 | 2010-03-19 | Method of flue gas separation and depressurization as well as flue-returning and burning |
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|---|---|
| CN102192498A true CN102192498A (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010127207 Pending CN102192498A (en) | 2010-03-19 | 2010-03-19 | Method of flue gas separation and depressurization as well as flue-returning and burning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152676A (en) * | 2017-06-15 | 2017-09-12 | 董磊 | Residual heat from boiler fume utilizes and reduced the air supply system of NO_x formation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039826U (en) * | 1988-07-22 | 1989-06-21 | 上海交通大学 | Cycling combustion system for kiln smoke |
| EP1059294A1 (en) * | 1999-06-09 | 2000-12-13 | Guascor Investigacion y Desarrollo, S.A. | Procedure for the treatment of purines |
| JP2005274015A (en) * | 2004-03-24 | 2005-10-06 | Mitsui Eng & Shipbuild Co Ltd | Circulation fluidized bed boiler device and its operation control method |
| CN2826178Y (en) * | 2005-10-21 | 2006-10-11 | 王宏 | Feedback reburning type purifying, smoke eliminating and dust removing device |
| CN101592336A (en) * | 2009-07-06 | 2009-12-02 | 宁波怡诺能源科技有限公司 | A kind of fluidized-bed combustion boiler |
-
2010
- 2010-03-19 CN CN 201010127207 patent/CN102192498A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039826U (en) * | 1988-07-22 | 1989-06-21 | 上海交通大学 | Cycling combustion system for kiln smoke |
| EP1059294A1 (en) * | 1999-06-09 | 2000-12-13 | Guascor Investigacion y Desarrollo, S.A. | Procedure for the treatment of purines |
| JP2005274015A (en) * | 2004-03-24 | 2005-10-06 | Mitsui Eng & Shipbuild Co Ltd | Circulation fluidized bed boiler device and its operation control method |
| CN2826178Y (en) * | 2005-10-21 | 2006-10-11 | 王宏 | Feedback reburning type purifying, smoke eliminating and dust removing device |
| CN101592336A (en) * | 2009-07-06 | 2009-12-02 | 宁波怡诺能源科技有限公司 | A kind of fluidized-bed combustion boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152676A (en) * | 2017-06-15 | 2017-09-12 | 董磊 | Residual heat from boiler fume utilizes and reduced the air supply system of NO_x formation |
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Application publication date: 20110921 |