CN1517589A - Waste gas treatment system for paint drying oven - Google Patents
Waste gas treatment system for paint drying oven Download PDFInfo
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- CN1517589A CN1517589A CNA031127185A CN03112718A CN1517589A CN 1517589 A CN1517589 A CN 1517589A CN A031127185 A CNA031127185 A CN A031127185A CN 03112718 A CN03112718 A CN 03112718A CN 1517589 A CN1517589 A CN 1517589A
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- drying oven
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- waste gas
- gas
- flue gas
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Abstract
A waste gas treating system for paint oven with product entrance and exis is composed of said paint oven, incinerator, air exhaustor, and multi-stage heat exchanger. The air comes in the oven via product entrance and then becomes waste gas, which is exhausted into incinerator for burning it. The high-temp fume flows through multi-stage heat exchanger and then is discharged.
Description
Technical field
The present invention relates to environmental protection exhaust-gas treatment field, particularly a kind of Paint Drying Oven exhaust treatment system.
Background technology
Drying oven for general transmission chain type, particularly the organic exhaust gas that produced in the bake process of product with general Paint Drying Oven of the organic exhaust gas that produced of priming paint drying oven is difficult to collect effectively and handle, always in the product inlet of drying oven, outlet to external diffusion, cause the air pollution of external environment condition, the product that sprayed paint is along the drying oven body of heater, transmit through conveyer chain by product inlet, through the drying oven inner heating drying, the paint on the product surface in heating process, be heated volatilization, decomposition.Produce a large amount of oil flue waste gas, progressively rise to the top of heating furnace, because oil flue waste gas is heavier than air, therefore sink gradually again, form thick fog group from products export and porch to external diffusion, contain many noxious materials, particularly organic matter in these oil flue waste gas, this gas has and brings out cancer, causes one of root of breathing problem, when polluting, at the stove internal upper part oil droplet that congeals into, be dropped on the product again, form hard oil mark, cause product to do over again.Drying oven waste gas is to environment, all have very big harm to operating personnel and product.Once tried out the method that waste gas burns then that extracts for this reason, become oxide high-temperature gas after will containing organic process high-temp combustion, organic matter is discharged innoxiously, than having improved much without processing, be the effective ways that adopt in the similar place of a kind of majority, yet existing priming paint drying oven emission-control equipment is in the stage casing of body of heater square fume absorbing openings to be set, with the oil smoke of extracting out, heating flame falls, and the shortcoming of its existence is:
1, the position and the shape of fume absorbing openings setting are unreasonable, and waste gas extracts not thorough, still has a large amount of waste gas to leak.
2, fume absorbing openings is located at the middle part of drying oven, is the highest temperature section of drying oven, if increase the exhausting amount, influences bake out temperature in the stove, increase furnace temperature, has then increased energy resource consumption.
3, do not handle waste gas after the burning, the high temperature when failing waste gas burning is effectively recycled.
Summary of the invention
The oil flue waste gas that the objective of the invention is effectively to solve the priming paint Paint Drying Oven as mentioned above reclaims fully and handles, and effectively with heat energy recycle.
The present invention is the priming paint drying oven that transmits chain type, product through painting passes to product in the inlet drying stove of conveyer chain at product outlet, and be provided with firing equipment, utilize heating, drying, the exhaust treatment system of this drying oven is characterized in that using three air exhausters that fresh air is sent into drying oven from the exit of product, extract waste gas out through rear portion, product porch, send into incinerator through pipeline and carry out high-temp combustion, and in the pipeline of process, be provided with after the repeatedly heat exchange flue gas emptying.
Under the process condition of original priming paint drying oven exhaust-gas treatment, carried out deep research, by air quantity, blast, speed, the test of resistance, calculating to original equipment, to understanding in depth of the actual conditions of the heating of product paint, cooling, flow regime in the drying oven, and progressively improvement, perfect, the exhaust-gas treatment flow process system that design makes new advances.Native system mainly is to solve three problems, the firstth, and waste gas absorbs fully, and the secondth, waste gas completing combustion, the 3rd is the high-temperature flue gas available heat recycling after the burning.
The incinerator of waste gas completing combustion wherein, it has autonomous independent control system, and incinerator has gas-fired, this device is with oily, the size that enters exhausted air quantity is promptly wanted completing combustion energy savings again, and general heating becomes organic exhaust gas into oxide, environmental sound.Only waste gas need be infeeded in the use of design native system and get final product, completing combustion is independently carried out.
The following method of taking that absorbs fully of the present invention:
In investigation, find, the overall process of product oven dry is that product is in conveyer chain is sent into drying oven after one meter, the beginning heating volatilizes organic exhaust gas, volatile matter heating volatilization becomes gaseous state in the product surface paint, around product and upwards, spread, volatile substance is in the process of upwards diffusion, reach thermal balance with hot-air on every side, the oils volatile substance volatile matter in the priming paint particularly under identical temperature, always the air than equality of temperature is heavy, so under the effect of gravitational field, the oil smoke spray flows downward again, the oils volatile matter then moves to the two ends upper inclined surface in the oven dry body of heater, if there is not the exhaust-gas treatment measure, volatile matter can go out from drying oven two ends product, the porch is excessive, and the product drying course mainly is that the anterior volatile matter of drying oven is maximum, product flow to the most of drying course in middle part and finishes substantially, the volatile matter of having crossed middle part product afterwards gradually reduces, therefore bleed position and the structure of selecting and design rear portion, product inlet place are successful keys, the metastomium place of going into that is chosen in the drying oven product is best position of collecting waste gas along sheath top plate place, body of heater slope, this waste gas draft hood mouth is a rectangle mouth of pipe, its length accounts for 70～100% of drying oven inner top width, open its bottom, open the base longer dimension near the product inlet end, the inside is short and outward-dipping, be in order to aim at the waste gas flue inwards, a longer dimension by the product inlet end has the waste gas of stopping effect.
Fresh air is sent into drying oven from products export, and the middle and lower part of drying oven oblique wave is provided with air outlet, and air outlet is the tubular body that has some angles, from the bottom air inlet, blows out on the upper side from the side.
The drying oven product goes out, the sealing of porch also is the very important factor that the present invention collects waste gas fully, though going out of product, inlet has all been taked seal approach, but product and conveyer chain all will pass in and out drying oven, impossible closed sealing, air passes in and out unavoidably to some extent, for this reason in order to make waste gas not to external diffusion, and have inwardly air-breathing on a small quantity, must produce the subnormal ambient in the drying oven, therefore require the negative pressure in negative pressure-PC district of draft hood mouth higher, the product inlet end is inwardly air-breathing few again, the top of product inlet particularly, then tighter to seal request, the negative pressure-PS of the air-supply oral region of products export end is lower than the negative pressure-PC district of draft hood mouth.
Outside the draft hood mouth, be provided with the waste gas air exhauster, taking out waste gas is sent into incinerator through preheating, outside air outlet, be provided with air-heater, fresh air through preheating is sent into drying oven, the standard air quantity of these two blower fans quite but power differ widely, the air quantity of waste gas air exhauster should be slightly larger than the air output of air-heater, it is the power source that guarantees that air evenly flows to the product inlet place from products export, in use should be according to the size of drying oven, product oven dry quantity, the exhausted air quantity that volume produced are adjusted the air quantity of blower fan.
Emit after in the pipeline of process, repeatedly heat exchange being set as mentioned above: comprise on A, the draft hood mouth pipeline afterwards waste gas～flue gas heat exchange device is housed, give waste gas with the exchange heat of flue gas, waste gas is connected to the waste gas air exhauster by pipeline, send into incinerator then, flue gas is gone back to high pressure air exhauster, emptying then from the top by pipeline.
Be provided with some furnace gas-flue gas heat exchange device in B, the pipeline behind incinerator, give furnace gas, make in the drying oven by pipeline to heat, to reduce the needed energy of oven dry product the high temperature heat exchange of just having burnt.Make the high-temperature flue gas that burnt progressively reduce temperature simultaneously.
C, in B, flue gas is sent into air-fume exchanger by pipeline after furnace gas-flue gas heat exchange device,, give the fresh air that has just entered, fresh air is heated up, send into the air outlet of products export through pipeline the exchange heat of flue gas by this heat exchanger.
And through the flue gas after the heat exchange repeatedly, also have surplus heat, turn back to drying oven top, product inlet place again, the waste gas of draft hood mouth back-flue gas heat exchange device, flue gas are waste gas described in the A---go back to the emptying then of high pressure air exhauster by pipeline behind the flue gas heat exchange device.
The waste gas at draft hood mouth place is because of the extraction zone negative pressure is stronger, the concentration of narmful substance height in the big waste gas in addition of speed, and the heat that self absorbs is bigger, therefore need be with heating by the exhaust gases.
Furnace gas-flue gas heat exchange device is effectively to utilize the flue gas heat after burning to convert the oven dry furnace heat to, in each furnace gas-flue gas heat exchange device small-sized fan is arranged all, owing to used multi-stage heat-exchanger to increase the vapour lock in the pipeline, therefore be provided with the high pressure air exhauster when flue gas is discharged, the total head that high pressure is bled is 2-4 a times of waste gas air exhauster.
This Paint Drying Oven exhaust treatment system has solved the collection and the processing of the oil flue waste gas of Paint Drying Oven effectively, and effectively utilizes the heat utilization problem behind the burned waste gas.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a draft hood mouth structure schematic diagram.
Fig. 3 is the air outlet structural representation.
The specific embodiment
Referring to accompanying drawing, wherein 1, drying oven, 2, the high pressure air exhauster, 3, air-flue gas heat exchange device, 4, furnace air---flue gas heat exchange device, 5, incinerator, 6, waste gas air exhauster, 7, draft hood mouth, 8, waste gas---flue gas heat exchange device, 9, product, 10, air outlet, 11, air-heater, IN product inlet, OUT products export.
Embodiment
In the present embodiment, fresh air at first enters the air outlet 10 at products export OUT place through thermomotor 11 by air-flue gas heat exchange device 3, air runs to the draught hood mouth 7 at product inlet IN place along drying oven 1 internal channel, waste gas enters waste gas-flue gas heat exchange device 8 then after waste gas air exhauster 6 enters incinerator 5, waste gas becomes flue gas and enters many furnace airs behind high temperature incineration---and the flue gas of flue gas heat exchange device 4 enters waste gas-flue gas heat exchange device 8 fume pipes at oven dry furnace shell top again, goes back to 2 emptyings of high pressure air exhauster again.Be provided with air outlet 10 at 0～15 meter of products export OUT end, air outlet 10 for the tubular body that has some angles from the bottom air inlet, blow out on the upper side from the side, make it air-supply evenly.At 0.3 meter to 10 meters at product inlet IN end, be provided with draft hood mouth 7 above the drying oven shell 1, this draft hood mouth 7 is a rectangle mouth of pipe, its length accounts for more than 80% of drying oven insied width, open the bottom of draft hood mouth 7, opens end power, longer dimension near product inlet IN end, the weak point and outward-dipping of the inside, the shape of formation air draught in drying oven.
Repeatedly heat exchange comprises:
A, on the pipeline after dryer 1 product inlet top draft hood mouth 7 waste gas-flue gas heat exchange device 8 is being housed between draft hood mouth 7 and the waste gas air exhauster 6.
B, on the pipeline behind the incinerator 5, be provided with some furnace airs-flue gas heat exchange device 4.
C, after furnace air-flue gas heat exchange device 4, send into air-flue gas heat exchange device 3 by pipeline.
Make fresh air enter the first preheating in back.The total head of high pressure air exhauster is 2-4 a times of waste gas air exhauster 6.
Claims (6)
1, a kind of Paint Drying Oven exhaust treatment system, comprise drying oven and products thereof entry and exit, incinerator, it is characterized in that fresh air sends into drying oven through the product exit, the passage of air in drying oven becomes waste gas to the operation of product inlet place, extract the stove processing of burning then out outward, high-temperature flue gas after the burning is discharged after multistage heat exchange, in the exhaust-gas treatment loop, makes air force by air exhauster.
2, Paint Drying Oven exhaust treatment system according to claim 1, it is characterized in that in the exhaust-gas treatment pipeline, make air force by three air exhausters, A is that the waste gas air exhauster is extracted the back top region out from the product inlet rear portion with waste gas, sends into the incinerator burning thereafter; B discharges flue gas for the high pressure air exhauster is contained in the last of exhaust-gas treatment loop; C is that air-heater is sent into drying oven with the fresh air of preheating from the exit of product.
3, Paint Drying Oven exhaust treatment system according to claim 1, it is characterized in that described fresh air sends into drying oven from products export, it is middle and lower part at drying oven outlet oblique wave, be provided with air outlet, air outlet is the tubular body that has some angles, from the bottom air inlet, blow out on the upper side from the side.
4, Paint Drying Oven exhaust treatment system according to claim 1, it is characterized in that described product inlet place extraction waste gas is meant on the drying oven housing, be provided with the draft hood mouth apart from rear portion, product inlet place, this draft hood mouth is a rectangle mouth of pipe, its length accounts for 70～100% of drying oven inner top width, and open draft hood mouth bottom, opens the base longer dimension near the product inlet end, the weak point and outward-dipping of the inside forms negative pressuren zone at the draft hood oral region.
5, Paint Drying Oven exhaust treatment system according to claim 1 is characterized in that the high-temperature flue gas after the described burning is discharged, its multistage heat exchange after multipole heat exchange:
A, on the top of drying oven product inlet, pipeline after the draft hood mouth, waste gas～flue gas heat exchange device is housed;
B, on the pipeline behind the incinerator, be provided with many furnace gas～flue gas heat exchange device;
Be provided with air in C, the pipeline after the furnace gas described in the B～flue gas heat exchange device---the flue gas heat exchange device;
Connect between D, the heat exchanger at different levels for connecting, flue gas is flowed in heat exchanger fully.
6, Paint Drying Oven exhaust treatment system according to claim 1, the total head that it is characterized in that the high pressure air exhauster are 2～4 times of waste gas air exhauster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031127185A CN1517589A (en) | 2003-01-18 | 2003-01-18 | Waste gas treatment system for paint drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031127185A CN1517589A (en) | 2003-01-18 | 2003-01-18 | Waste gas treatment system for paint drying oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1517589A true CN1517589A (en) | 2004-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031127185A Pending CN1517589A (en) | 2003-01-18 | 2003-01-18 | Waste gas treatment system for paint drying oven |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421815C (en) * | 2005-09-01 | 2008-10-01 | 中国国际海运集装箱(集团)股份有限公司 | Container paint house system with exhaust-gas treatment facilities |
| CN101011692B (en) * | 2006-12-08 | 2010-06-16 | 黄桂清 | Environment friendly and energy saving method and device for coat dying of continuous paint baking |
| CN101829649A (en) * | 2010-05-26 | 2010-09-15 | 浙江华立涂装设备有限公司 | Drying oven for spraying |
| CN103292334A (en) * | 2013-06-27 | 2013-09-11 | 姚钰锋 | Waste gas processing method and device for forming machine |
| CN105114961A (en) * | 2015-09-29 | 2015-12-02 | 江苏鼎范环保服务有限公司 | Method and heat recovery system for recovering and recycling waste paint bucket |
| CN105864803A (en) * | 2016-03-31 | 2016-08-17 | 张家港市弘扬石化设备有限公司 | Direct combustion type waste gas treatment and heat energy utilization system and utilization method |
-
2003
- 2003-01-18 CN CNA031127185A patent/CN1517589A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421815C (en) * | 2005-09-01 | 2008-10-01 | 中国国际海运集装箱(集团)股份有限公司 | Container paint house system with exhaust-gas treatment facilities |
| CN101011692B (en) * | 2006-12-08 | 2010-06-16 | 黄桂清 | Environment friendly and energy saving method and device for coat dying of continuous paint baking |
| CN101829649A (en) * | 2010-05-26 | 2010-09-15 | 浙江华立涂装设备有限公司 | Drying oven for spraying |
| CN103292334A (en) * | 2013-06-27 | 2013-09-11 | 姚钰锋 | Waste gas processing method and device for forming machine |
| CN103292334B (en) * | 2013-06-27 | 2015-06-24 | 吴竺 | Waste gas processing method and device for forming machine |
| CN105114961A (en) * | 2015-09-29 | 2015-12-02 | 江苏鼎范环保服务有限公司 | Method and heat recovery system for recovering and recycling waste paint bucket |
| CN105114961B (en) * | 2015-09-29 | 2019-02-12 | 江苏鼎范环保服务有限公司 | A kind of method and its heat recovery system that the recovery processing of waste oil paint can recycles |
| CN105864803A (en) * | 2016-03-31 | 2016-08-17 | 张家港市弘扬石化设备有限公司 | Direct combustion type waste gas treatment and heat energy utilization system and utilization method |
| CN105864803B (en) * | 2016-03-31 | 2018-11-30 | 张家港市弘扬石化设备有限公司 | A kind of direct-fired exhaust-gas treatment and heat energy utilization system and utilize method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |