CN102635857B - Flue gas reutilization technology flue gas and the air blender device of low NOx drainage fall - Google Patents
Flue gas reutilization technology flue gas and the air blender device of low NOx drainage fall Download PDFInfo
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- CN102635857B CN102635857B CN201210083760.4A CN201210083760A CN102635857B CN 102635857 B CN102635857 B CN 102635857B CN 201210083760 A CN201210083760 A CN 201210083760A CN 102635857 B CN102635857 B CN 102635857B
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Abstract
The present invention reduces NOXFlue gas reutilization technology flue gas and the air blender device of discharge, relate to industrial burner technical field, it is characterized in that: flue gas-air mixing chamber inwall is fixedly connected with axial diversion reinforcement, and mixing chamber inner chamber middle part is equipped with board-like honeycomb screen; The top of board-like honeycomb screen is equipped with combustion air entrance and smoke inlet section, and the below of board-like honeycomb screen is equipped with mixed gas outlet, and the lower end of mixing chamber is water conservancy diversion wedged bottom, and the low side of water conservancy diversion wedged bottom is equipped with water seal U-shaped pipe. Advantage of the present invention is: due to the even premix of fresh air, reduced the concentration of oxygen in flue gas and air mixture, be conducive to reduce high temperature modification NOXGeneration, also reduced the reaction of intermediate product nitrogen-containing group and oxygen, be therefore conducive to reduce the fuel type NO of fuel oilXGeneration. This mixing arrangement is simple in structure, without changing burner body, operates steadily, and successful, NO when combustion gasXConcentration of emission can reduce by 30%, when fuel oil, can reduce by 10%～30%.
Description
Technical field
The present invention relates to the hybrid technology field of apparatus for industry fuel-oil combustor partial fume and air, relate in particular to a kind of flue gas reutilization technology that falls low NOx drainage, make the flue gas and the mixed uniformly blending bin device of fresh air that recycle.
Background technology
Along with the raising that Environmental Protection in China requires, appearance and the application of low-carbon (LC) low emission, energy-saving and emission-reduction policy, proposed requirements at the higher level to fuel-firing gas-firing burner at the aspect such as safety, environmental protection.
The NO that fuel gas buring producesXMainly heating power type, more than 1536 degree, NOXA large amount of generation, CO is the result due to the imperfect combustion generation of combustion gas. The NO that oil inflame producesXMainly contain two kinds of heating power type and fuel types. wherein thermal NOXPrinciple similar to above-mentioned gas burner, fuel type easily produces NO with airborne combination with oxygen mainly due to the N atom in fuelX. Name is called " the super mixing arrangement of industrial burner gaseous fuel and combustion air " (patent No.: Chinese patent 200710041897.2) is mainly for thermal NOXMechanism, in burner body structure, improve and invention, reduce the flame peak temperature of burner hearth, make fire box temperature more even, thereby reduce NOXDischarge; And to reduce the fuel type NO of fuel oilX, the also chance of the combination of the N atom in necessary minimizing fuel oil and oxygen. Fewer, DeGrain. And to reduce the fuel type NO of fuel oilX, the also chance of the combination of the N atom in necessary minimizing fuel oil and oxygen.
Particularly oil burner of traditional burner, is relating to reduction NOXIt is fewer that discharge aspect is done, DeGrain.
Summary of the invention
The object of the invention is: do not changing on the basis of burner body structure, increasing the blending bin device of a combustion product flue gas and fresh air, thereby reducing the oxygen concentration in flue gas and air mixture, and relatively reducing the temperature in burner hearth.
For achieving the above object, the technical scheme of employing is: reduce NOXFlue gas reutilization technology flue gas and the air blender device of discharge, comprise flue gas-air mixing chamber, smoke inlet section, combustion air entrance and mixed gas outlet, it is characterized in that: described flue gas-air mixing chamber inwall is fixedly connected with axial diversion reinforcement, described flue gas-air mixing chamber inner chamber middle part is equipped with board-like honeycomb screen; The top of described board-like honeycomb screen is equipped with combustion air entrance and smoke inlet section, and the below of described board-like honeycomb screen is equipped with mixed gas outlet, and the lower end of described flue gas-air mixing chamber is water conservancy diversion wedged bottom, and the low side of described water conservancy diversion wedged bottom is equipped with water seal U-shaped pipe.
Combustion air entrance is horn-like reducing.
The axis of smoke inlet section and mixing chamber axis are α angle, 90 ° of 45 ° of < α <.
The below of described board-like honeycomb screen is equipped with water conservancy diversion arc plate, in the middle of described water conservancy diversion arc plate, is circular arc, and two ends are respectively straight section flat board. and one end is fixedly connected with water conservancy diversion reinforcement in mixing chamber, and the other end is placed in mixed gas outlet.
Described water conservancy diversion wedged bottom and mixing chamber axis are β angle, 60 ° of 30 ° of < β <.
When work, combustion-supporting fresh air enters into mixing chamber upper end by trumpet type combustion air entrance and enters mixing chamber, the flue gas of combustion product enters into mixing chamber through smoke inlet section, in mixing chamber, be furnished with board-like honeycomb screen, some water conservancy diversion reinforcements and water conservancy diversion arc plate, fresh air and flue gas at an angle in mixing chamber violent scour mix, mixed gas outlet connects extraneous burner fans entrance, under the suction of blower fan, finally make mixing chamber produce micro-negative pressure, combustion product gases part is mixed with combustion air, be transported in buner system and go to burn with fuel mix via mixed gas outlet.
Good effect of the present invention is: in mixing chamber of the present invention, be furnished with board-like honeycomb screen, some water conservancy diversion reinforcements and water conservancy diversion arc plate, can reduce air agitation, and fresh air acutely collides and mixes at an angle with flue gas in mixing chamber, forms uniform flue gas-air mixture. Due to the even premix of fresh air partial fume, can reduce the oxygen concentration in flue gas and air mixture, be on the one hand conducive to reduce high temperature modification NOXGeneration, also reduced in addition the reaction of intermediate product nitrogen-containing group and oxygen, a part will be converted into molecule N2, is therefore conducive to reduce the fuel type NO of fuel oilXGeneration. Through our company, many places result of the test shows, NO when combustion gasXConcentration of emission can reduce by 30%, when fuel oil, can reduce by 10%～30%. This mixing arrangement is simple in structure, without changing burner body, operates steadily, and successful.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the A of Fig. 1 is to structural representation;
Fig. 3 is that the B of Fig. 1 is to structural representation.
In figure, 1-combustion air entrance; 2-flue gas-air mixing chamber; 3-smoke inlet section; 4-mixed gas outlet; 5-mixing chamber water conservancy diversion wedged bottom; 6-water seal U-shaped pipe; 7-water conservancy diversion reinforcement; 8-water conservancy diversion arc plate; The board-like honeycomb screen of 9-.
Detailed description of the invention
Fig. 1 is structural representation of the present invention, from diagram, reduces NOXThe flue gas reutilization technology flue gas of discharge and the blending bin device of air, comprise flue gas-air mixing chamber 2, smoke inlet section 3, combustion air entrance 1 and mixed gas outlet 4, it is characterized in that: described flue gas-air mixing chamber 2 inwalls are fixedly connected with axial diversion reinforcement 7, described flue gas-air mixing chamber 2 inner chamber middle parts are equipped with board-like honeycomb screen 9; The top of described board-like honeycomb screen 9 is equipped with combustion air entrance 1 and smoke inlet section 3, the below of described board-like honeycomb screen 9 is equipped with mixed gas outlet 4, the lower end of described flue gas-air mixing chamber 2 is water conservancy diversion wedged bottom 5, and the low side of described water conservancy diversion wedged bottom 5 is equipped with water seal U-shaped pipe 6.
The axis of the axis of smoke inlet section 3 and mixing chamber 2 is α angle, 90 ° of 45 ° of < α <.
The below of described board-like honeycomb screen 9 is equipped with water conservancy diversion arc plate 8, and described water conservancy diversion arc plate 8 stage casings are circular arc, and two ends are respectively straight section flat board. and one end is fixedly connected with the interior water conservancy diversion reinforcement 7 of mixing chamber 2, and the other end is placed in mixed gas outlet 4.
Described water conservancy diversion wedged bottom 5 is β angle with mixing chamber 2 axis, 60 ° of 30 ° of < β <.
When work, combustion-supporting fresh air enters mixing chamber by horn-like contraction entrance 1 from mixing chamber 2 upper ends, the flue gas of combustion product enters into mixing chamber 2 through smoke inlet section 3, in mixing chamber 2, be furnished with board-like honeycomb screen 9, some water conservancy diversion reinforcements 7 and water conservancy diversion arc plate 8, can reduce air agitation, and fresh air mixes at the interior violent scour of mixing chamber 2 at an angle with flue gas, form uniform flue gas-air mixture, mixed gas outlet 4 connects extraneous burner fans entrance, under the suction of blower fan, make the micro-negative pressure of the interior generation of mixing chamber 2, combustion-supporting fresh air is by doing under the effect of mixing chamber 2 interior negative pressure, enter mixing chamber 2 mixes with the combustion product gases part entering from smoke inlet section 3 from mixing chamber 2 tops, last described flue gas-air mixture passes through respectively the above and below of water conservancy diversion arc plate 8, be transported in buner system and go to burn with fuel mix via mixed gas outlet 4. reduce like this reaction of intermediate product nitrogen-containing group and oxygen, combustion product gases part is mixed with combustion air, be then jointly transported to burner and fuel mix burning.
Air intake is the tubaeform entrance resistance that can reduce air of reducing.
Mixing chamber 2 internal face vertical directions are evenly arranged from top to bottom and are welded with 4～10 water conservancy diversion reinforcements 7, i.e. flat iron bar, and material is ordinary carbon steel, can reduce air agitation, and strengthens the intensity of mixing chamber 2 walls; Smoke inlet section 3 acutangulates α (45 < α < 90) with mixing chamber 2, and like this, air can mix by mutual violent scour with flue gas, and air is unlikely to pour in down a chimney in smoke inlet section 3. Flue gas comes from boiler tail, is the product after fuel combustion, because the flue-gas temperature of combustion product is 140～180 degree, main component is carbon dioxide, steam, dew-point temperature approximately 65 degree, and the general temperature of fresh air is-5～25 degree, both mass flow ratios are 10: 1～8: 1. So once mixing, steam in flue gas just condenses into rapidly aqueous water and is deposited on the bottom of mixing chamber 2, volume sharply reduces, make air-flow that violent turbulent flow easily occur, easily bring out mixing chamber 2 sharp poundings, and in this device, owing to first there being the rectified action of board-like honeycomb screen 9, have the guide functions of water conservancy diversion arc plate 8 to add the convergent rectified action of the tubaeform reducing of mixed gas outlet 4 front ends, gaseous mixture can flow out mixed gas outlet 4 stably again; The bottom of mixing chamber 2 is water conservancy diversion wedged bottom 5 simultaneously, and in vertical direction with acute angles beta (30 < β < 60). Water seal U-shaped pipe 6 is positioned at mixing chamber 2 lowest parts, is communicated with mixing chamber 2. The aqueous water condensing is deposited on mixing chamber water conservancy diversion wedged bottom 5, discharges mixing chamber 2 via hydrolock U-shaped pipe 6, avoids mixing chamber 2 ponding and corrodes mixing arrangement, impact operation.
Claims (3)
1. reduce NOXFlue gas reutilization technology flue gas and the air blender device of discharge, comprise flue gas-air mixing chamber, smoke inlet section, combustion air entrance and mixed gas outlet, described flue gas-air mixing chamber inwall is fixedly connected with axial diversion reinforcement, and described flue gas-air mixing chamber inner chamber middle part is equipped with board-like honeycomb screen; The top of described board-like honeycomb screen is equipped with combustion air entrance and smoke inlet section, the below of described board-like honeycomb screen is equipped with mixed gas outlet, it is characterized in that: the below of described board-like honeycomb screen is equipped with water conservancy diversion arc plate, in the middle of described water conservancy diversion arc plate, be circular arc, two ends are respectively straight section flat board, wherein one end is fixedly connected with water conservancy diversion reinforcement in mixing chamber, and the other end is placed in mixed gas outlet middle part.
2. the flue gas reutilization technology flue gas and the air blender device that fall according to claim 1 low NOx drainage, is characterized in that: the axis of described smoke inlet section and mixing chamber axis are α angle.
3. the flue gas reutilization technology flue gas and the air blender device that fall according to claim 2 low NOx drainage, is characterized in that: described α angle is: 90 ° of 45 ° of < α <.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210083760.4A CN102635857B (en) | 2012-03-27 | 2012-03-27 | Flue gas reutilization technology flue gas and the air blender device of low NOx drainage fall |
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| CN201210083760.4A CN102635857B (en) | 2012-03-27 | 2012-03-27 | Flue gas reutilization technology flue gas and the air blender device of low NOx drainage fall |
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| CN102635857A CN102635857A (en) | 2012-08-15 |
| CN102635857B true CN102635857B (en) | 2016-05-18 |
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| CN103925596B (en) * | 2014-05-07 | 2016-05-04 | 太仓市高泰机械有限公司 | A kind of dynamical gas burner |
| CN106225003A (en) * | 2016-08-31 | 2016-12-14 | 上海华之邦科技股份有限公司 | In a kind of flue gas recirculation, flue gas closes and dehydrating unit with air pre-mixing |
| CN106669379A (en) * | 2017-01-19 | 2017-05-17 | 上海华之邦科技股份有限公司 | Boiler flue gas recirculation dehumidification device |
| CN106861397A (en) * | 2017-03-03 | 2017-06-20 | 黄永乐 | A kind of boiler exhaust gas treatment facilities and the boiler using the structure |
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| JPS61117989U (en) * | 1985-01-10 | 1986-07-25 | ||
| EP0087643B1 (en) * | 1982-02-24 | 1986-09-10 | Kraftwerk Union Aktiengesellschaft | Exhaust duct for gas turbines |
| US4919170A (en) * | 1987-08-08 | 1990-04-24 | Veba Kraftwerke Ruhr Aktiengesellschaft | Flow duct for the flue gas of a flue gas-cleaning plant |
| JPH11114393A (en) * | 1997-10-09 | 1999-04-27 | Ishikawajima Harima Heavy Ind Co Ltd | Gas mixing device |
| CN101732980A (en) * | 2010-01-19 | 2010-06-16 | 福建龙净环保股份有限公司 | Diversion device and fume circulating fluidized bed desulfurization system with same |
| CN101975321A (en) * | 2010-10-26 | 2011-02-16 | 西安建筑科技大学 | Rectangular wind-pipe separate converging-rectifying three-way pipe |
| CN202494107U (en) * | 2012-03-27 | 2012-10-17 | 上海诺特飞博燃烧设备有限公司 | Smoke and air mixing box device for reducing NOx emission through smoke recycling technology |
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2012
- 2012-03-27 CN CN201210083760.4A patent/CN102635857B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087643B1 (en) * | 1982-02-24 | 1986-09-10 | Kraftwerk Union Aktiengesellschaft | Exhaust duct for gas turbines |
| JPS61117989U (en) * | 1985-01-10 | 1986-07-25 | ||
| US4919170A (en) * | 1987-08-08 | 1990-04-24 | Veba Kraftwerke Ruhr Aktiengesellschaft | Flow duct for the flue gas of a flue gas-cleaning plant |
| JPH11114393A (en) * | 1997-10-09 | 1999-04-27 | Ishikawajima Harima Heavy Ind Co Ltd | Gas mixing device |
| CN101732980A (en) * | 2010-01-19 | 2010-06-16 | 福建龙净环保股份有限公司 | Diversion device and fume circulating fluidized bed desulfurization system with same |
| CN101975321A (en) * | 2010-10-26 | 2011-02-16 | 西安建筑科技大学 | Rectangular wind-pipe separate converging-rectifying three-way pipe |
| CN202494107U (en) * | 2012-03-27 | 2012-10-17 | 上海诺特飞博燃烧设备有限公司 | Smoke and air mixing box device for reducing NOx emission through smoke recycling technology |
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| CN102635857A (en) | 2012-08-15 |
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