CN1793722A - Hot oil furnace of burning straw powder material and its combustion method - Google Patents
Hot oil furnace of burning straw powder material and its combustion method Download PDFInfo
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- CN1793722A CN1793722A CN 200510112028 CN200510112028A CN1793722A CN 1793722 A CN1793722 A CN 1793722A CN 200510112028 CN200510112028 CN 200510112028 CN 200510112028 A CN200510112028 A CN 200510112028A CN 1793722 A CN1793722 A CN 1793722A
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Abstract
The invention is a hot oil furnace of burning stalk powder, comprising a combustion chamber and a convective heating chamber and characterized in that a fume return mouth is arranged before a fume inlet of the convective heating chamber and connected through pipeline and temperature regulating fan with the fume outlet of the convective heating chamber. The invention solves the technique of deposit and foul of silicide smoke on the heat exchanger in the heat exchange course.
Description
Technical field:
The invention relates to boiler and burning, particularly make hot oil furnace and its combustion method that the sanding powder that produces in the wood-based plate process is made fuel by crop stalk about burning.
Background technology:
Wood-based plate is in the process of processing and manufacturing, need to use a large amount of heat energy, for reducing production costs, utilize enterprise itself to have resource as far as possible, its thermal hardware hot oil furnace is except that using mining industry fuel such as coal, oil, natural gas where necessary, and main the employing gathered materials on the spot the remaining leftover bits and pieces in sheet material processing back, waste material and the sanding powder fuel as boiler.Yet along with the raw material of wood-based plate are constantly expanded, the advancing by leaps and bounds of processing technology, original leftover bits and pieces, waste material also become recycling raw material processing and manufacturing sheet material again gradually, and the fuel that only remaining sanding powder can be used as hot oil furnace is used.In recent years; the gluing technology makes great progress; particularly adopt formaldehydeless different hydrogen acid ether (hydrogen acid ester) (MDI) to make binding agent; not only can make wood-based plate meet the safety requirements of indoor air environment, and can make the agricultural crop straw that was originally abandoned in a large number, as straw, rice straw, cornstalk and fringe rod; pulverize the raw material of back as wood-based plate; both enlarge the artifical board material source, turned waste into wealth, protected the forest reserves and ecological environment again, stepped into the broad road of sustainable development.
But these agricultural crop straws contain a large amount of silicides, and they are when burning, and silicide will be with the flue gas disperse in air.Therefore, if with the fuel of these powder of straw as hot oil furnace, when the hot flue gas of height carries out heat exchange by the Convective Heating chamber, the silicide in the flue gas will deposit fouling on the counter-flow heat exchanger of complications coiling, reduce its thermal efficiency, and shorten dramatically its service life.Just because of there is the very easily problem of fouling of boiler in the burning crop straws powder, make manufacturing enterprise that sanding powder have to be abandoned and adopt coal, oil, coal gas that other fuel such as natural gas provides heat energy.This not only makes producer's fuel cost of producing artificial board of straw heighten, and piles up a difficult problem of disposing but also produced a large amount of stalk sanding powders.
Summary of the invention:
The object of the present invention is to provide a kind of hot oil furnace of burning straw powder material and its combustion method, solve silicide cigarette ash in its heat exchanging process deposits fouling on heat exchanger technical problem.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of hot oil furnace of the straw powder that burns, comprise combustion chamber and Convective Heating chamber, it is characterized in that: be provided with the smoke backflow mouth before the smoke inlet of this Convective Heating chamber, this smoke backflow mouth links to each other with the exhanst gas outlet of temperature adjustment blower fan with this Convective Heating chamber by pipeline.
It is characterized in that: be provided with the radiation heating chamber, this radiation heating chamber is between between this combustion chamber and Convective Heating chamber; This smoke backflow mouth is arranged on top, radiation heating chamber.
It is characterized in that: the flue place that establishes between radiation heating chamber and this Convective Heating chamber in binding is provided with the interface that thermometer is installed.
The combustion method of above-mentioned hot oil furnace is characterized in that:
1, start the combustion fan of combustion chamber, full trrottle purged the combustion chamber about about 3 minutes;
2, air door is half-open, opens the natural gas nozzle, the burning torch igniting, treat steady flame after, full trrottle;
When 3, the thermometer of interface reaches 500 ℃, start the air-introduced machine communicate with exhanst gas outlet, make the combustion chamber be in-20～-negative pressure state of 50pa;
4, open the powder of straw nozzle, treat its flame stabilization after, close the natural gas nozzle one by one, up to closing combustion fan;
When 5, the thermometer of interface rises to 800 ℃～900 ℃ scopes, open the temperature adjustment blower fan;
6, if the powder of straw nozzle is in operation and extinguishes, then need under the condition of stop supplies powder of straw, to continue purging with conveying fan and close the powder of straw nozzle after about 2 minutes, repeat 1～5 operation then;
7, close whole powder of straw nozzles, completion of combustion.
Advantage of the present invention is as follows:
Solved the technical problem of the silicide fouling in baroque convection type heat exchanger in the straw burning flue gas.
Can make full use of the powder that stays after the artificial board of straw sanding and do the fuel of boiler, remove the difficult problem of the sanding powder of enterprise's bulk deposition.
Realized the principle that raw material are made the best use of everything, in the whole building board production process, raw material are all used up.
For the wood-based plate manufacturing provides cheap heat energy, saved production cost.
The radiant type heat exchanger maintaining of radiation heating of the present invention chamber is easy, only the fouling on its coil pipe is manually rooted out to get final product.
Hot oil furnace of the present invention can use natural gas or fuel oil to heat-conducting oil heating separately when the powder of straw shortage, and heat energy is provided.
Description of drawings:
Fig. 1 is a structural representation of the present invention,
Fig. 2 is a fundamental diagram of the present invention.
The specific embodiment:
See also shown in Figure 1ly, hot oil furnace of the present invention comprises combustion chamber 4 and Convective Heating chamber 2.This combustion chamber 4 is provided with natural gas nozzle 3 and powder of straw nozzle 5.Be provided with the convection type heat exchanger 21 that the conduit of the tortuous coiling of numerous levels constitutes in this Convective Heating chamber 2, this convection type heat exchanger 21 by conduction oil interface c, d with adiabatic conduit and join with hot equipment.The smoke inlet of this Convective Heating chamber 2 communicates with combustion chamber 4, and its exhanst gas outlet b links to each other with chimney through air-introduced machine by pipeline, and the low-temperature flue gas after the heat exchange is entered atmosphere.Be provided with smoke backflow mouth j before the smoke inlet of Convective Heating chamber 2, this smoke backflow mouth j links to each other with exhanst gas outlet b with the temperature adjustment blower fan by pipeline.The low-temperature flue gas that the present invention utilizes Convective Heating chamber 4 to discharge refluxes, the high-temperature flue gas that flows out with combustion chamber 4 mixes, to reduce the temperature that flows into flue gas in the Convective Heating chamber 4, make it be no more than 900 ℃, so, the silicide temperature that is contained in the flue gas also about 900 ℃, is lower than its distortion softening range (900～1000 ℃), can not stick and be connected on the convection type heat exchanger 21, go out and discharge stove with air-flow.
In order to improve the thermal efficiency, except the volume that enlarges Convective Heating chamber 2, the present invention has also be provided with radiation heating chamber 1 between combustion chamber 4 and Convective Heating chamber 4, is provided with radiation heat exchanger 11 in this radiation heating chamber 1.The conduction oil coil pipe cylinder that this radiation heat exchanger 11 is an individual layer, its tube wall is thicker, tube pitch is bigger, when the flue gas of high temperature in the combustion chamber 4 is flowed through this radiation heat exchanger 11, though the silicide cigarette ash of molten is easy in its coil pipe outer wall fouling in the flue gas, but the radiation heat exchanger 11 of said structure can remove fouling from its coil pipe outer wall supernatant easily, and can not impact its service life, 4 high-temperature flue gas that come out carry out preliminary heat exchange by this radiation heating chamber 1 from the combustion chamber simultaneously, its temperature descends to some extent, helps that the flue gas that enters Convective Heating chamber 2 is carried out temperature adjustment and handles.Smoke backflow mouth j is arranged on 1 top, radiation heating chamber, and be provided with the interface e that thermometer is installed at the flue place that connects radiation heating chamber 1 and Convective Heating chamber 2, be convenient to observe the flue-gas temperature that enters Convective Heating chamber 2, in time start the temperature adjustment blower fan, high-temperature flue gas after the part low-temperature flue gas that exhanst gas outlet b is discharged enters 1 top, radiation heating chamber and wherein carries out preliminary heat exchange from smoke backflow mouth j mixes, make this mixed flue gas be cooled to≤enter Convective Heating chamber 2 after 900 ℃, again to the heat-conducting oil heating in its counter-flow heat exchanger 21.
What the present invention used is a kind of stalk fuel of powdery, by pressed gas powder of straw is sprayed into combustion chamber 4 internal combustion from powder of straw nozzle 5, therefore at first need in combustion chamber 4, create the temperature conditions of the powder of straw of igniting, otherwise misoperation, to cause dust explosion, therefore, combustion method of the present invention is as follows:
1, start the combustion fan of combustion chamber 4, full trrottle purges the combustion chamber 4 about about 3 minutes.
2, air door is half-open, opens natural gas nozzle 3, the burning torch igniting, and behind the steady flame, full trrottle.
When 3, the temperature at interface E place reaches 500 ℃, start the air-introduced machine communicate with exhanst gas outlet b, make maintenance-20 in the combustion chamber 4～-the 50pa negative pressure.
4, open powder of straw nozzle 5, treat its flame stabilization after, close natural gas nozzle 3 one by one, until closing combustion fan, drop into the quantity of the powder of straw nozzle 5 of burning and determine by institute's calorific requirement.
5, if the temperature at interface e place when 800 ℃～900 ℃ scopes, unlatching temperature adjustment blower fan, otherwise close the temperature adjustment blower fan.
6, flame-out if powder of straw nozzle 5 is in operation, then need to repeat 1～5 operation then closing the powder of straw nozzle with conveying fan continuation purging after about 2 minutes under the condition of stop supplies powder of straw.
7, close whole powder of straw nozzle 5 completion of combustion.
Now in conjunction with Fig. 2 operation principle of the present invention is done a detailed description, the present invention uses natural gas in the combustion chamber internal combustion earlier, treats that the temperature in its burner hearth rises to 500 ℃, creates the environment of a spontaneous ignition for the powder of straw that sprays into.In view of requiring burner hearth, powder of straw under condition of negative pressure, can be split into stable burning, pure chimney air inducing still can not meet the demands, so should start this moment air-introduced machine make burner hearth generation-20 combustion chamber in～-the 50pa negative pressure, thereby formed by the combustion chamber through radiation heat exchanger, counter-flow heat exchanger, air-introduced machine is to the flue gas stream of chimney, flue gas is when flowing through radiation heat exchanger and counter-flow heat exchanger successively simultaneously, the part heat that it is entrained is passed to the conduction oil in the interchanger, and by the poly-hot press of delivering to of conduction oil circulation, the heat exchanger heat supply of heat-needing facilities such as dryer.The flue-gas temperature that flow out the combustion chamber is more than 1000 ℃, and the silicide that wherein closes is the fusion soft state, and viscosity is big, very easily at the body surface adventitious deposit, forms fouling.In case when flue-gas temperature was lower than 900 ℃, silicide cigarette ash wherein solidified and is non-melting state, loses viscosity, seldom is attached on body surface.Simultaneously, the coil pipe of radiation heat exchanger is sparse, and one deck is only arranged, and tube wall is thicker, and the fouling on it is very easily manually rooted out, but the counter-flow heat exchanger complex structure, extremely difficult removing the after the fouling.Therefore, the high-temperature flue gas that the present invention takes to come out from the combustion chamber passes through radiation heat exchanger earlier, in the heating conduction oil, suitably reduce flue-gas temperature, and be back near mouthful of counter-flow heat exchanger flue or radiation heat exchanger tail end with the low-temperature flue gas that the temperature adjustment blower fan will be discharged from the Convective Heating chamber, make the flue-gas temperature that enters counter-flow heat exchanger be controlled at 800 ℃～900 ℃ scope, both fully improve the thermal efficiency of flue gas, avoided the fouling of counter-flow heat exchanger again.
Natural gas nozzle 3 of the present invention also can change fuel nozzle into, replaces the auxiliary fuel of natural gas as the hot oil furnace that ignites with fuel oil.
Claims (4)
1, a kind of hot oil furnace of the straw powder that burns, comprise combustion chamber and Convective Heating chamber, it is characterized in that: be provided with the smoke backflow mouth before the smoke inlet of this Convective Heating chamber, this smoke backflow mouth links to each other with the exhanst gas outlet of temperature adjustment blower fan with this Convective Heating chamber by pipeline.
2, the hot oil furnace of burning straw powder material according to claim 1 is characterized in that: be provided with the radiation heating chamber, this radiation heating chamber is between between this combustion chamber and Convective Heating chamber; This smoke backflow mouth is arranged on top, radiation heating chamber.
3, the hot oil furnace of burning straw powder material according to claim 2 is characterized in that: be provided with the interface that thermometer is installed at the flue place that links between this radiation heating chamber and this Convective Heating chamber.
4, a kind of combustion method that is used for the hot oil furnace of claim 1,2 or 3 described burning straw powder materials is characterized in that:
1) combustion fan of startup combustion chamber, full trrottle purged the combustion chamber about about 3 minutes;
2) air door is half-open, opens the natural gas nozzle, the burning torch igniting, treat steady flame after, full trrottle;
When 3) thermometer of interface reaches 500 ℃, start the air-introduced machine communicate with exhanst gas outlet make the combustion chamber be in-20～-negative pressure state of 50pa;
4) open the powder of straw nozzle, treat its flame stabilization after, close the natural gas nozzle one by one, up to closing combustion fan;
When 5) thermometer of interface rises to 800 ℃～900 ℃ scopes, open the temperature adjustment blower fan;
6) if the powder of straw nozzle is in operation and extinguishes, then need under the condition of stop supplies powder of straw, to continue purging with conveying fan and close the powder of straw nozzle after about 2 minutes, repeat 1～5 operation then;
7) close whole powder of straw nozzles, completion of combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101120285A CN100381754C (en) | 2005-12-27 | 2005-12-27 | Hot oil furnace of burning straw powder material and its combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101120285A CN100381754C (en) | 2005-12-27 | 2005-12-27 | Hot oil furnace of burning straw powder material and its combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1793722A true CN1793722A (en) | 2006-06-28 |
| CN100381754C CN100381754C (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101120285A Active CN100381754C (en) | 2005-12-27 | 2005-12-27 | Hot oil furnace of burning straw powder material and its combustion method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506361A (en) * | 2018-11-16 | 2019-03-22 | 崔小勤 | A kind of natural gas boiler and its method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101198U (en) * | 1991-06-10 | 1992-04-08 | 董维义 | Radiation-convection concentric high-temp. hot ali furnace |
| CN2104410U (en) * | 1991-06-10 | 1992-05-13 | 董维义 | Combined radiation-convection high-temp. hot-blast stove |
| CN2479362Y (en) * | 2001-02-28 | 2002-02-27 | 诺维特有限公司 | Oil and gas boiler |
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2005
- 2005-12-27 CN CNB2005101120285A patent/CN100381754C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506361A (en) * | 2018-11-16 | 2019-03-22 | 崔小勤 | A kind of natural gas boiler and its method |
| CN109506361B (en) * | 2018-11-16 | 2020-12-11 | 林雅娟 | Natural gas boiler and method thereof |
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| Publication number | Publication date |
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| CN100381754C (en) | 2008-04-16 |
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Application publication date: 20060628 Assignee: SHANGHAI COMPAK ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Assignor: Shanghai Kangbai Environment Protection Science & Technology Co., Ltd. Contract record no.: 2013310000117 Denomination of invention: Hot oil furnace of burning straw powder material and its combustion method Granted publication date: 20080416 License type: Exclusive License Record date: 20130909 |
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Effective date of registration: 20151222 Address after: 200001 Shanghai city Huangpu District Nanjing Road Plaza No. 409-459 East Building Room 1701-1705 Patentee after: SHANGHAI COMPAK ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Address before: 200023 Shanghai Xietu Road No. 768 room 1701-05 Patentee before: Shanghai Kangbai Environment Protection Science & Technology Co., Ltd. |