CN102425805B - 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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- CN102425805B CN102425805B CN201110372651XA CN201110372651A CN102425805B CN 102425805 B CN102425805 B CN 102425805B CN 201110372651X A CN201110372651X A CN 201110372651XA CN 201110372651 A CN201110372651 A CN 201110372651A CN 102425805 B CN102425805 B CN 102425805B
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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 airoutlet 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
The 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, it is outdoor about-20 ℃ cold air, do not carry out any heating and just participate in burning directly, it is the part heat that needs to absorb burner hearth that cold wind participates in burning, just can reach burning condition, heat with burner hearth heats cold wind, just directly reduced the temperature of burner hearth, also just reduced ignition temperature, the drawback of thing followed low-temperature burning just displays, remedy the drawback of low-temperature burning, can only realize with many fuel burnings at present, the waste that forms the energy so also just becomes inevitable.Because the boiler room does not just have new wind heating and ventilation system from designing, so being born with, it exists the defective of this respect, also have flue dust and dirty air in the boiler room also to can not get instant effective the eliminating, 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 stoker 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 be provided with outdoor fresh inlet specially, what have has also installed axial flow blower, directly send cold wind in the boiler room, or directly discharges the high-temperature gas in the boiler room outdoor, no matter ventilating opening is arranged, still do not have ventilating opening, entering 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 more cold, and to send into the temperature of new wind more low, and combustion position is more bad, and fire box temperature does not more increase, make the fuel that enters burner hearth fully evenly not burn or to burn endless, combustion conditions has formed vicious circle, and the more low burning of temperature is more bad, and the more bad temperature of burning is more low.Because the boiler room does not have new wind heating system, the combustion conditions of boiler is difficult to enter eucyclic state.
Present boiler room design is ventilation and new wind heating system not, exist certain drawback and defective, the new wind that enters 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, be the burning coal boiler room of Winter heat supply operation by it, dust concentration is very high, foul atmosphere row do not go out, allow the people be out of breath in the boiler room that has, dirty air allows the people suffocate, the serious harm health of operators, operating personnel are in order to reduce dust concentration, the door and window of boiler room are opened burning boiler or go to the outside saturating ventilative, and what have simply smashes the ventilation problem that solves to glass,, the fresh air that enters by door and window and other hole inorganization, the cold wind under the outdoor environment in winter really is though there is this peripheral structure of boiler room, but at this moment do not had the effect of building enclosure, the infiltration of serious cold wind is as at outdoor burning stove.
Summary of the invention
In order to solve the deficiencies in the 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 entrance 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 entrance 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 enters new wind heater by the new wind entrance 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 by 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 by 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 precipitation 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, but 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 by 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 according to the air quantity of the required new wind of burning and the temperature difference before and after the new wind heating, just can calculate the heat that the wind that makes new advances obtains, be converted into the mark coal by heat again, the result is the direct benefit that obtains then, and the fabrication and installation cost that just can regain boiler room ventilation and new wind heating system also has residue.The benefit that obtains for the large-sized boiler room can be higher, the more high burning that more is conducive to fuel 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, be conducive to the precipitation 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 by 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.Be very favorable to the work of new wind heating system, the temperature difference is more big more to be conducive to heat exchange, and heat exchange efficiency is more high.
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 below 40 ℃) are brought up in heating, and every the stove of heat that extracts from useless flue gas 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 entrance of tape spool flow fan, can save coal-fired 1,030,000 yuan.The new wind that heating boiler burning is used by 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 according to 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 by 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 entrance of tape spool flow fan, new wind just can become hot-air by new wind heater and enter in the boiler room, makes temperature rising in the boiler room.Air in the boiler room is admitted to (because the raising that enters the new wind-warm syndrome degree of air preheater in boiler and the air preheater again 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: new wind-warm syndrome degree on average can be improved about 60 ℃, becoming the new wind of heat sends in the boiler room, except having improved the boiler combustion temperature, also improved between coal handling system, pump the temperature in each room in water system, the boiler room, reduce 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 in the air preheater and the formation of crock, 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 entered benign recurrent state.
Description of drawings
The present invention will be further described below in conjunction with description of drawings and the specific embodiment.
Fig. 1 is boiler room of the present invention ventilation and new wind heating system figure.
Fig. 2 is the new wind heater of the present invention plane deployment diagram.
Among the figure 1 be new wind heater, 2 for the new wind entrance of tape spool flow fan, 3 for the outlet of new wind, 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 solves
The present invention is exactly these drawbacks and the defective at present boiler room, boiler room new wind warming and aeration system has been invented in design, the technical problem that solves burn exactly required new wind how to obtain the heating, and form complete new wind warming and aeration system, the present invention utilizes the big temperature difference between new wind and the useless flue gas, 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, and this system is safe and reliable, the acquisition of heat is cost free.For preventing cold end corrosion and the dust stratification of sulfide in the flue gas and other pernicious gas, we adopt corrosion-resistant material (as: pottery, enamel, materials such as acid resisting steel), the main new wind heater 1 that adopts enamel pipe to make, 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, the power that allows the new wind that obtains certain heat be produced by the new wind entrance of tape spool flow fan, send to and enter boiler room 10, enter air blast 7 by 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 enters the boiler room without heating, we are in the middle of the planning in new boiler room, design, construction for this reason, just can set up the content of 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 flue as the tube sheet of new wind heater 1); Exchange capability of heat; The reset mode of dust stratification; Insulation and safeguard procedures etc.When the boiler room design and construction, set up boiler room ventilation and new wind heating system, it is the most time saving and energy saving practice of saving money again, the full payment of this system only is 1% of boiler room construction investment, though the comprehensive benefit that construction investment seldom, produces is very considerable.Arrange 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, the hot-blast outlet of new wind heater directly can 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 investigation: boiler room ventilation and new wind heating system can both just can be installed with investment seldom in existing boiler room.Specific practice is as follows:
One, with the outdoor fresh inlet sealing of former air blast 7, changes indoor import into, make it complete and outdoor isolated, 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 except cinder notch etc. and the outdoor hole that is communicated with, prevent in the direct inlet chamber of cold wind.The effect of the more good new wind warming and aeration system operation of these holes sealing is more good, and heat loss is more little.
Three, the hot-blast outlet of new wind heater 1 is located at indoor; Be conducive to the distribution of hot blast.(locate as 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 enter.Carry out insulation and waterproof, rainproof, the inspection socket of maintenance and removing dust stratification be 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; As earthenware, clay pipe, enamel pipe, stainless steel tube etc.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 heat exchanger tube directly can be built by laying bricks or stones in flue 12, walling of flue and heat exchanger tube are good with the encapsulant shutoff, make the new wind heater 1 of shell-and-tube, shell side is flue 12, and tube side is the air channel, does like this to be conducive to ash disposal and maintenance replace tubes, the import and export of new wind, the import and export of useless flue gas should be installed thermometer 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 enters 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 boiler 9 participation burnings.
Six, described air blast blast pipe 6 is to arrange according to the exhaust duct of ventilation in the boiler room 10, by 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 entrance (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 entrance (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. take a breath and new wind heating system in boiler room according to claim 1, it is characterized in that: new wind enters new wind heater (1) by the new wind entrance (2) of tape spool flow fan, behind acidproof heat exchanger tube (16) acquisition heat, arrive new wind outlet (3) and through new wind shunting partition walls (15) new wind is assigned in the boiler room (10).
3. take a breath and new wind heating system in boiler room according to claim 1, it is characterized in that: original foul atmosphere sucks in the air blast (7) by 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 by chimney (11).
4. take a breath and new wind heating system in boiler room according to claim 1, it 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.
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| 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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| 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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| CN102425805A CN102425805A (en) | 2012-04-25 |
| CN102425805B true CN102425805B (en) | 2013-09-18 |
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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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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104614006B (en) * | 2014-12-25 | 2017-05-17 | 吉林省电力科学研究院有限公司 | Method for measuring CO2 emission factors of power station boiler |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4997130B2 (en) * | 2008-01-29 | 2012-08-08 | 日工株式会社 | Asphalt mixture production equipment |
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Patent Citations (4)
| 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 |
| 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 |
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