CN102425805A - Air change and fresh air heating system of boiler house - Google Patents
Air change and fresh air heating system of boiler house Download PDFInfo
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- CN102425805A CN102425805A CN201110372651XA CN201110372651A CN102425805A CN 102425805 A CN102425805 A CN 102425805A CN 201110372651X A CN201110372651X A CN 201110372651XA CN 201110372651 A CN201110372651 A CN 201110372651A CN 102425805 A CN102425805 A CN 102425805A
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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 invention discloses an air change and fresh air heating system of a boiler house, and belongs to the field of air change systems of boiler houses. The system comprises a fresh air heater, a fresh air inlet with an axial flow fan, a fresh air outlet, a draught fan, a desulfurization dust remover, a blower air inlet pipe, a blower, an air pre-heater, a boiler, the boiler house, a chimney and a flue, wherein the fresh air heater is arranged between the boiler house and the chimney, one end of the fresh air heater is provided with the fresh air inlet with the axial flow fan, and the fresh air outlet at the other end of the fresh air heater is connected to the inner part of the boiler house; the draught fan is connected with the desulfurization dust remover; one end of the blower is connected with the blower air inlet pipe, and the other end of the blower is connected with the air pre-heater; the air pre-heater is connected with the boiler; and the boiler house is connected with the chimney through the flue. By the method of improving the environmental temperature of the boiler house and the air supply temperature of the boiler, purifying the air in the boiler house, improving the thermal efficiency of the boiler, saving energy and reducing environmental pollution, a new thought of saving energy and reducing emission is broadened and a new path of saving energy and reducing emission is created.
Description
Technical field
The invention belongs to air exchange system field, boiler room, particularly relate to boiler room employed warming and aeration system.
Background technology
Required new wind of boiler combustion and boiler room ventilation present situation in the prior art.
The required new wind of boiler combustion in the prior art is by air blast outdoor cold air (new wind) directly to be sent into air preheater to burn to boiler, does not have the boiler of air preheater, and cold air (new wind) burns with regard to directly being admitted to boiler.Air blast is sent into the new wind of burning in the winter time, is outdoor about-20 ℃ cold air, does not carry out any heating and just participates in burning directly; Cold wind is participated in burning is the part heat that needs to absorb burner hearth, just can reach burning condition, heats cold wind with the heat of burner hearth; Just directly reduced the temperature of burner hearth; Also just reduced ignition temperature, the drawback of thing followed low-temperature burning just displays, and remedy the drawback of low-temperature burning; Can only realize that at present the waste that forms the energy so also just becomes inevitable with many fuel burnings.Because the boiler room does not just have new wind heating and ventilation system from designing; Exist the defective of this respect so it is born with, also have the flue dust in the boiler room also to can not get instant effective the eliminating with dirty air, flue dust fills the air; Divulge a secret everywhere in the boiler room that has; Cold wind is made sth. dry or cool, and as the stoker is general in the open, thermal loss is very big.Its reason is that the mode that new wind is sent in existing boiler room exists bigger drawback, is exactly that the boiler room does not have or very unscientificly send new wind mode to cause.The top of existing most of boiler rooms all is provided with outdoor fresh inlet specially, and what have has also installed axial flow blower; Directly in the boiler room, send cold wind, or the high-temperature gas in the boiler room is directly discharged outdoor, no matter ventilating opening arranged; Still do not have ventilating opening, getting in the boiler room all is cold wind, causes in the boiler room environment temperature low; Have and adopt the also of no avail of dim facility, make blowoff valve in the boiler room, feed pipe, radiator etc. be damaged by frost often.There have air blast to send the new wind-warm syndrome degree of boiler to again to be also very low, is exactly outdoor weather temperature in winter basically, equals at outdoor burning boiler.Weather is cold more, and to send into the temperature of new wind low more, and combustion position is bad more, and fire box temperature does not increase more; Make the fuel that gets into burner hearth fully evenly not burn or to burn endless; Combustion conditions has formed vicious circle, and the low more burning of temperature is bad more, and the bad more temperature of burning is low more.Because the boiler room does not have new wind heating system, the combustion conditions of boiler is difficult to get into eucyclic state.
Present boiler room design is ventilation and new wind heating system not, exists certain drawback and defective, and the new wind that gets into the boiler room can not get heating and just participates in burning; Air dirty in the boiler room can't be got rid of again, is the burning coal boiler room of Winter heat supply operation by it, and dust concentration is very high; Foul atmosphere row do not go out, and lets the people be out of breath in the boiler room that has, and dirty air lets the people suffocate; The serious harm health of operators, operating personnel open burning boiler or go to the outside door and window of boiler room ventilative thoroughly in order to reduce dust concentration; What have simply smashes the ventilation problem that solves to glass,, and through the fresh air of door and window with other hole inorganization entering; Cold wind under the outdoor environment in winter really; Though this peripheral structure of boiler room is arranged, at this moment do not had the effect of building enclosure, serious cold wind infiltration is as general at outdoor burning stove.
Summary of the invention
In order to solve the deficiency of prior art, the invention provides following technical scheme.Boiler room ventilation and new wind heating system; It is characterized in that: comprise the new wind inlet of new wind heater, tape spool flow fan, new wind outlet, air-introduced machine, desulfurizing dust-collector, air blast blast pipe, air blast, air preheater, boiler, boiler room, chimney; Flue; Described new wind heater is installed in the flue between boiler room and the chimney, and new wind heater inside is equipped with acidproof heat exchanger tube; Described air-introduced machine is connected with desulfurizing dust-collector; Described air blast one end is connected with the air blast blast pipe other end and links to each other with air preheater; Described air preheater links to each other with boiler; Outside, described boiler room is provided with the new wind inlet of tape spool flow fan, and inside is provided with new wind outlet, and new wind shunting partition wall is installed in the boiler room.
New wind gets into new wind heater by the new wind inlet of tape spool flow fan, behind acidproof heat exchanger tube acquisition heat, arrives new wind outlet and through new wind shunting partition wall new wind is assigned in the boiler room.
Original foul atmosphere sucks in the air blast through the air blast blast pipe in the boiler room, and is sent in air preheater and the boiler by air blast; The flue gas that boiler produces enters into desulfurizing dust-collector through air preheater, by air-introduced machine row flue, through new wind heater the acidproof heat exchanger tube of heat transferred is entered atmosphere through chimney.
The outside of described flue is equipped with the insulation casing, and on the insulation casing access hole is installed.
Beneficial effect: the benefit that heats new wind: prove with relevant product that through factual survey the useless flue gas heat energy of low temperature can reclaim and utilize fully.The flue gas that boiler produces is via the deposition of equipment such as economizer, air preheater, desulfurizing dust-collector, air-introduced machine and overanxious; Sulfide and dust content have reduced much; Temperature has also descended a lot; Though certain corrosivity is arranged, compare with the benefit that reclaims heat, just seem insignificant.Under the situation that current energy prices are doubled and redoubled, the necessity that reclaims and utilize is just arranged more.We generally adopt common iron plate to be made through observing the boiler flue chimney operating position that a lot of metals (iron and steel) are made, and service life is all more than the more than ten years.We are based on the air quantity of the required new wind of burning and the temperature difference of new wind heating front and back; Just can calculate the heat that wind obtained that makes new advances; Be converted into the mark coal by heat again, the direct benefit that the result is then to be obtained, the fabrication and installation cost that just can regain boiler room ventilation and new wind heating system also has residue.The benefit that is obtained for the large-sized boiler room can be higher, the high more burning that helps fuel more of wind pushing temperature.Boiler room of the present invention ventilation and new wind characteristics of heating system and advantage are: the air that has effectively constantly purified the boiler room; Reduced the dust concentration in the boiler room; Improve environment temperature in ignition temperature and the boiler room, when having reduced exhaust gas temperature, also contained NO
X, SO
XDeng the generation of pernicious gas, help the deposition of flue gas flying dust, thereby reduced the discharge of harmful gases amount.
Utilize useless fume afterheat to heat the value calculation of new wind:
We can calculate the heat that new wind obtains through actual measurement exhaust gas temperature, wind pushing temperature and the environment temperature of boiler room, Changchun:
Environment temperature and wind pushing temperature is low as can be seen from the above table, the height of exhaust gas temperature.Work to new wind heating system is very favorable, and the temperature difference helps heat exchange more greatly more, and heat exchange efficiency is high more.
Our promise is with new wind-20 ℃ by winter; 40 ℃ (the new wind-warm syndrome degree that enters into the boiler room should be controlled at below 40 ℃) are brought up in heating, and every the stove of heat that from useless flue gas, extracts is every year: 0.2 χ, 29 χ, 8000 χ, 0.24 χ [40-(20)] χ, 24 χ 170/7000=389 tons mark coal
But this boiler room feast-brand mark in every year coal: 390 χ 3+389/2=1362 tons mark coal
The boiler room of scale like this; Adopt boiler room ventilation and new wind heating system; A heating period can be saved 1362 tons of fire coals (mark coal) at least; Amount to 800 yuan/ton=1,090,000 yuan of RMB 1362 χ at market price, deduct 60,000 yuan of the annual operating costs of the new wind of tape spool flow fan inlet, can save coal-fired 1,030,000 yuan.The new wind that heating boiler burning is used through reclaiming and utilizing useless fume afterheat to realize, is to cement out through the heat that new air heating device will give up in the flue gas, so only drains waste gas and does not drain heat, just can reduce the consumption of the energy greatly.
There is the advantage of the temperature difference greatly based on new wind and useless flue gas, just can designs and produces a kind of equipment that utilizes the fume afterheat that gives up to heat new wind.For being different from boiler air preheater, we are called new wind heater to this equipment.The new wind heater of fabrication and installation will be according to the terrain actual conditions, and the fresh air heat exchanger that the making of suiting measures to local conditions is multi-form is installed in after the air-introduced machine, before the chimney in the outdoor flue of this section.Air blast is the foul atmosphere in the boiler room; Suck through the air blast blast pipe; Send into boiler and participate in burning, make the negative pressure that produces in the boiler room, add the power of the new wind inlet of tape spool flow fan; New wind just can become hot-air through new wind heater and get in the boiler room, makes temperature rising in the boiler room.Air in the boiler room is admitted to again in boiler and the air preheater (owing to get into the raising of the new wind-warm syndrome degree of air preheater simultaneously; The cold and hot temperature difference reduces; Played the effect of protection air preheater), the air themperature of sending into boiler combustion like this can be higher, more stable.
The advantage of boiler room of the present invention ventilation and new wind heating system is: can new wind-warm syndrome degree on average be improved about 60 ℃; Becoming the new wind of heat sends in the boiler room; Except that having improved the boiler combustion temperature; Also improve between coal handling system, pump the temperature in each room in water system, the boiler room, reduced the radiation loss of boiler body, pipeline etc., intercepted large-area cold wind infiltrations such as building enclosure door and window body of wall.Prevent or slowed down dewfall and the formation of crock in the air preheater, purified the air in the boiler room, improved stoker's environment and combustion conditions, also we can say by burning stove winter to have become and burn stove summer.There are experience and data to prove; The change of this burning situation, it is about 3～8% to improve boiler thermal output, fuel savings 5～12%.The combustion conditions of boiler has just got into benign recurrent state.
Description of drawings
Below in conjunction with the description of drawings and the specific embodiment the present invention is further specified.
Fig. 1 is boiler room of the present invention ventilation and new wind heating system figure.
Fig. 2 is the new wind heater of a present invention plane deployment diagram.
Among the figure 1 be new wind heater, 2 new wind inlets for the tape spool flow fan, 3 for new wind outlet, 4 for air-introduced machine, 5 for desulfurizing dust-collector, 6 for the air blast blast pipe, 7 for air blast, 8 for air preheater, 9 for boiler, 10 for boiler room, 11 is chimney, 12 be flue, 13 for access hole, 14 for the insulation casing, 15 for new wind shunting partition wall, 16 be acidproof heat exchanger tube.
The specific embodiment
The technical problem that is solved
The present invention is exactly these drawbacks and the defective to present boiler room, and boiler room new wind warming and aeration system has been invented in design, and how the technical problem that the is solved required new wind that burns exactly obtains heating; And form complete new wind warming and aeration system, and the present invention utilizes the big temperature difference between new wind and the useless flue gas, and the advantage of good effect of heat exchange realizes; Be exactly to utilize useless fume afterheat; Come the required new wind of heating flame, improve new wind-warm syndrome degree, and form the new wind heating system of a whole set of energy-conserving and environment-protective; This system is safe and reliable, and the acquisition of heat is a cost free.For preventing the cold end corrosion and the dust stratification of sulfide and other pernicious gas in the flue gas; We adopt corrosion-resistant material (as: materials such as pottery, enamel, acid resisting steel), the new wind heater 1 that mainly adopts enamel pipe to process, about 15 years of the service life of this heater; Be installed in the outdoor flue 12 behind the air-introduced machine 4; Utilize the outdoor useless flue gas of discharge to heat new wind, let the new wind that obtains certain heat, send to and get into boiler room 10 by the power that the new wind inlet of tape spool flow fan produces; Get into air blast 7 through air blast blast pipe 6 again and send into air preheater 8 and boiler 9; Participate in boiler 9 burnings, thereby improved the burning quality of boiler 9, solved boiler room 10 new wind heating and ventilation problems again.
Boiler room ventilation and new wind heating system are installed; Just adopt this system when being preferably in the planning and designing in new boiler room; Change the practice that the new wind in conventional boiler room just gets into the boiler room without heating; For this reason we in the middle of the planning in new boiler room, design, construction, the content that just can set up this respect, boiler room ventilation and the most suitable field fabrication of new wind heating system and installation; The installation site that comprises new wind heater 1; Make material (also can directly utilize the tube sheet of flue) as new wind heater 1; Exchange capability of heat; The reset mode of dust stratification; Insulation and safeguard procedures or the like.Set up boiler room ventilation and new wind heating system during design and construction in the boiler room; It is the most time saving and energy saving practice of saving money again; The full payment of this system is merely 1% of boiler room construction investment, though construction investment seldom, the comprehensive benefit that is produced is very considerable.Be provided with and implement this new wind warming and aeration system, can make the waste heat of useless flue gas obtain to greatest extent recycling, and effectively solve boiler room 10 ventilation problems, its specific practice is with down.
The improvement of existing boiler room: now; The boiler room of central heating and the normal heating boiler room (comprising the thermal power plant boiler room) that burns; Boiler room ventilation and new wind heating system can be installed (during the summer boiler operatiopn; Can the hot-blast outlet of new wind heater directly be connected with blower inlet, but will keep suction port).Can design enforcement according to what suited measures to local conditions in the position of flue.According to investigating: boiler room ventilation and new wind heating system can both just can be installed with investment seldom in existing boiler room.Specific practice is following:
One, with the outdoor fresh inlet sealing of former air blast 7, changes indoor import into, make it to completely cut off with outdoor fully, and carry out the rainproof insulation after the sealing.
Two, carry out the sealing of boiler room building enclosure (peripheral structure that refers to buildings such as exterior wall, roofing, door, window).As: door, window, skylight, axial flow blower hole, trench, advance coal and remove cinder notch etc. and the outdoor hole that is communicated with, prevent in the direct inlet chamber of cold wind.The effect of the good new more wind warming and aeration system operation of these holes sealing is good more, and heat loss is more little.
Three, the hot-blast outlet of new wind heater 1 is located at indoor; Help the distribution of hot blast.(locate like the doorway of frequent unlatching, slag remover, coaling machine etc., the through type warm air curtain also can be installed, can do the intrusion that cold wind is intercepted in the water conservancy diversion air channel when having ready conditions).
Four, the air inlet of the tape spool flow fan of new wind heater 1 is located at outdoorly, be above the ground level, and add protection network, avoids dust and other impurities to get into.Carry out insulation and waterproof, rainproof, the inspection socket of maintenance and removing dust stratification arranged.
Five, the heat exchanger tube of the new wind heater 1 in boiler room ventilation and the new wind heating system adopts pipeline corrosion-resistant, good heat conduction effect to make; Like earthenware, clay pipe, enamel pipe, stainless steel tube or the like.The main enamel pipe that adopts, tube sheet can be used steel plate, need not weld; Adopt the resilient material shutoff of heat-and corrosion-resistant tube sheet gap, also can heat exchanger tube directly be built by laying bricks or stones in flue 12, walling of flue and heat exchanger tube will use the encapsulant shutoff good; Make the new wind heater 1 of shell-and-tube, shell side is a flue 12, and tube side is the air channel; Do like this and help ash disposal and maintenance replace tubes, the import and export of new wind, the import and export of useless flue gas; Answer mounting temperature meter and Pressure gauge, can grasp the working condition of boiler room ventilation and new wind heating system at any time.New wind heater 1 utilizes useless fume afterheat, and heating gets into the new wind in the boiler room 10.Foul atmosphere is installed in the boiler room 10 in the boiler room 10, as the air blast blast pipe 6 suction air blasts 7 of exhaust duct, and sends into air preheater 8 and participates in burning with boiler 9.
Six, described air blast blast pipe 6 is to arrange according to the exhaust duct of ventilation in the boiler room 10, through the reasonable Arrangement of air blast blast pipe 6, gets rid of the foul atmosphere in the boiler room 10.
Conclusion: boiler room of the present invention ventilation and new wind heating system; Promote boiler room environment temperature and boiler wind pushing temperature, purify the air in the boiler room, improve boiler thermal output; Energy savings; Reduce this method of environmental pollution, widened the new approaches of energy-saving and emission-reduction, created the new route of energy-saving and emission-reduction.
Claims (4)
1. take a breath and new wind heating system in the boiler room; It is characterized in that: comprise the new wind inlet (2) of new wind heater (1), tape spool flow fan, new wind outlet (3), air-introduced machine (4), desulfurizing dust-collector (5), air blast blast pipe (6), air blast (7), air preheater (8), boiler (9), boiler room (10), chimney (11); Flue (12); Described new wind heater (1) is installed in the flue (12) between boiler room (10) and the chimney (11), and new wind heater (1) inside is equipped with acidproof heat exchanger tube (16); Described air-introduced machine (4) is connected with desulfurizing dust-collector (5); Described air blast (7) one ends are connected with air blast blast pipe (6) other end and link to each other with air preheater (8); Described air preheater (8) links to each other with boiler (9); Outside, described boiler room (10) is provided with the new wind inlet (2) of tape spool flow fan, and inside is provided with new wind outlet (3), and new wind shunting partition wall (15) is installed in boiler room (10).
2. boiler room according to claim 1 ventilation and new wind heating system; It is characterized in that: new wind gets into new wind heater (1) by the new wind inlet (2) of tape spool flow fan; Behind acidproof heat exchanger tube (16) acquisition heat, arrive new wind outlet (3) and new wind is assigned in the boiler room (10) through new wind shunting partition walls (15).
3. boiler room according to claim 1 ventilation and new wind heating system; It is characterized in that: original foul atmosphere sucks in the air blast (7) through air blast blast pipe (6) in boiler room (10), and is sent in air preheater (8) and the boiler (9) by air blast (7); The flue gas that boiler (9) produces enters into desulfurizing dust-collector (5) through air preheater (8), by air-introduced machine (4) row flue (12), through new wind heater (1) the acidproof heat exchanger tube of heat transferred (16) is entered atmosphere through chimney (11).
4. boiler room according to claim 1 ventilation and new wind heating system is characterized in that: the outside of described flue (12) is equipped with insulation casing (14), and on the insulation casing (14) access hole (13) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110372651XA CN102425805B (en) | 2011-11-22 | 2011-11-22 | Air change and fresh air heating system of boiler house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110372651XA CN102425805B (en) | 2011-11-22 | 2011-11-22 | Air change and fresh air heating system of boiler house |
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| Publication Number | Publication Date |
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| CN102425805A true CN102425805A (en) | 2012-04-25 |
| CN102425805B CN102425805B (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110372651XA Expired - Fee Related CN102425805B (en) | 2011-11-22 | 2011-11-22 | Air change and fresh air heating system of boiler house |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767816A (en) * | 2012-07-16 | 2012-11-07 | 山东泓奥电力科技有限公司 | System for lowering exhaust gas temperature of boiler in external-internal combined mode |
| CN103759284A (en) * | 2014-02-20 | 2014-04-30 | 北京龙电宏泰环保科技有限公司 | Electrostatic precipitation technology with flue gas heat exchange system configured |
| CN104614006A (en) * | 2014-12-25 | 2015-05-13 | 吉林省电力科学研究院有限公司 | System and method for measuring carbon dioxide emission factors of power station boiler |
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| CN2156402Y (en) * | 1993-05-26 | 1994-02-16 | 黑龙江省农业机械工程科学研究院 | Boiler smoke waste heat recovery device |
| CN2854358Y (en) * | 2005-12-30 | 2007-01-03 | 李毓秀 | Gas boiler device capable of sufficient using residual heat |
| JP2009179935A (en) * | 2008-01-29 | 2009-08-13 | Nikko Co Ltd | Asphalt mixture manufacturing device |
| CN201652791U (en) * | 2009-12-25 | 2010-11-24 | 天津华能能源设备有限公司 | Horizontal type coal hot air furnace with combustion air preheater |
| EP2309185A2 (en) * | 2009-09-30 | 2011-04-13 | Hitachi, Ltd. | Oxyfuel combustion boiler plant |
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2011
- 2011-11-22 CN CN201110372651XA patent/CN102425805B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156402Y (en) * | 1993-05-26 | 1994-02-16 | 黑龙江省农业机械工程科学研究院 | Boiler smoke waste heat recovery device |
| CN2854358Y (en) * | 2005-12-30 | 2007-01-03 | 李毓秀 | Gas boiler device capable of sufficient using residual heat |
| JP2009179935A (en) * | 2008-01-29 | 2009-08-13 | Nikko Co Ltd | Asphalt mixture manufacturing device |
| EP2309185A2 (en) * | 2009-09-30 | 2011-04-13 | Hitachi, Ltd. | Oxyfuel combustion boiler plant |
| CN201652791U (en) * | 2009-12-25 | 2010-11-24 | 天津华能能源设备有限公司 | Horizontal type coal hot air furnace with combustion air preheater |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767816A (en) * | 2012-07-16 | 2012-11-07 | 山东泓奥电力科技有限公司 | System for lowering exhaust gas temperature of boiler in external-internal combined mode |
| CN102767816B (en) * | 2012-07-16 | 2015-07-08 | 山东泓奥电力科技有限公司 | System for lowering exhaust gas temperature of boiler in external-internal combined mode |
| CN103759284A (en) * | 2014-02-20 | 2014-04-30 | 北京龙电宏泰环保科技有限公司 | Electrostatic precipitation technology with flue gas heat exchange system configured |
| CN104614006A (en) * | 2014-12-25 | 2015-05-13 | 吉林省电力科学研究院有限公司 | System and method for measuring carbon dioxide emission factors of power station boiler |
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|---|---|
| CN102425805B (en) | 2013-09-18 |
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