CN102322734A - End steam-hot air conversion device of pipe bundle drier - Google Patents
End steam-hot air conversion device of pipe bundle drier Download PDFInfo
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- CN102322734A CN102322734A CN201110187842A CN201110187842A CN102322734A CN 102322734 A CN102322734 A CN 102322734A CN 201110187842 A CN201110187842 A CN 201110187842A CN 201110187842 A CN201110187842 A CN 201110187842A CN 102322734 A CN102322734 A CN 102322734A
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- pipe
- bundle drier
- tail vapour
- pipe bundle
- hot blast
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to a mechanical device, i.e. an end steam-hot air conversion device of a pipe bundle drier, which is characterized in that the end steam exhaust port (1) of the pipe bundle drier is connected into an end steam recycle tank (2); the upper part of the end steam recycle tank (2) is connected into a water inlet pipe (5); the water inlet pipe (5) is connected with a spray header (3) in the tank; the upper end of the end steam recycle tank (2) is provided with an exhaust pipe (4); the lower part of the end steam recycle tank (2) is connected with a heat transfer pipe (6); and the other end of the heat transfer pipe (6) is connected with a preheater. The end steam-hot air conversion device of the pipe bundle drier has the beneficial effects that heat and water are remained by the end steam of the pipe bundle drier through spraying water mist, and uncondensed gas is discharged, thereby, the heat exchange performance is improved, the corrosivity is reduced, and the end steam becomes an available heat source, and moreover, a tank body is larger, and the energy storage action is protruded, therefore, a stable heat source can be provided for the preheater. The end steam-hot air conversion device of the pipe bundle drier is especially suitable for the air preheating of the pneumatic drying of green starch and has protruded energy saving and consumption reduction effects and extremely obvious economic benefit and environmental protection benefit. Moreover, the end steam-hot air conversion device of the pipe bundle drier has a skillful conception, a simple structure and reliable performance, so that significant progress is generated on a traditional starch production technology, and an application prospect is very considerable.
Description
Technical field
The present invention relates to a kind of mechanical device, promptly a kind of pipe bundle drier tail vapour-hot blast conversion equipment.
Background technology
Pipe bundle drier be a kind of be the drying equipment of thermal source with steam, in cornstarch production, be mainly used in the dried of plumule, slag crust and albumen powder.In dry run, pipe bundle drier will discharge a large amount of nearly 100 ℃ tail vapour, is the highest, the capable of using a part of waste vapour that is worth maximum of temperature in the Starch Production.According to statistics, produce the enterprise of 100,000 tons of cornstarch per year, only the tail vapour of pipe bundle drier discharging just reaches 43700 tons; Calculate by domestic steam average price 120-200 unit/ton; Consider that the tail stripping temperature is lower than steam and gets 120 yuan/ton of its lower limits, be worth 5,240,000 yuan, be equivalent to starch per ton and lose 50 yuan.In order to recycle pipe bundle drier tail vapour, the enterprise that has is used for the prime of multi-effect evaporator with this part tail vapour, carries out The pre-heat treatment to being evaporated material, but energy-saving effect and not obvious.Its reason is: tail vapour participates in some on-condensible gases in running, can be known by Dalton partial pressure theorem, in heat exchange container; The peripheral pressure of steam is lower than internal pressure, and particularly pressure more can reduce when heat exchange appears in peripheral steam and heat exchange wall, and on-condensible gas is on the contrary; Peripheral pressure is higher than internal pressure; Thereby on-condensible gas constantly accumulates in heat exchange interface, in the middle of vapor slugs is trapped among, hinders contacting of steam and heat exchange wall; Because the heat exchange rate of air causes heat exchange to be difficult to carry out far below the heat exchange wall.Prove according to relevant research:, also can make the condensation coefficient of steam reduce by 60% (seeing 43 pages in " Chemical Equipment Design pandect " heat exchanger fascicle) even 1% air is arranged in the water vapour.On-condensible gas not only hinders the heat energy output of tail vapour, but also can increase the dissolved oxygen composition of steam, and the heat exchanging device has very strong corrosiveness, strengthens the cost of heat transmission equipment, and the utilization of pipe bundle drier tail vapour is restricted.It is thus clear that, improve the heat exchange performance of pipe bundle drier tail vapour, reduce its corrosiveness, must reduce on-condensible gas wherein as far as possible., on-condensible gas is blended in the middle of the tail vapour, is difficult to separate.Therefore, most starches enterprise all directly is emitted on this part waste vapour in the atmosphere at present, causes energy waste and environmental disruption.
Summary of the invention
The purpose of this invention is to provide a kind of on-condensible gas that can remove in the pipe bundle drier tail vapour; Improve its heat exchange property; Reduce its corrosiveness; And then reclaim and utilize the heat of pipe bundle drier tail vapour, energy-saving and emission-reduction reduce production costs, avoid the pipe bundle drier tail vapour recycling equipment of environmental pollution.
Above-mentioned purpose is realized by following technical scheme: develop a kind of pipe bundle drier tail vapour-hot blast conversion equipment; Be characterized in: the back of pipe bundle drier adds a kind of tail vapour recycling can, and the tail vapour floss hole of pipe bundle drier inserts tail vapour recycling can, and water inlet pipe is inserted on tail vapour recycling can top; Water inlet pipe is connected to spray head in jar; The spray head top of tail vapour recycling can is provided with blast pipe, and the bottom picks out defeated heat pipe, another termination air preheater of defeated heat pipe.
The following installation of spray head has the unhurried current layer of many penetrating holes in the said tail gas recycle jar.
Be provided with the range of atomization between the gentle fluid layer of said spray head.
The said defeated heat pipe of one side joint of said air preheater, the opposite side water pipe that runs in.
The water inlet pipe of another termination tail vapour recycling can of the drainpipe of said air preheater.
Also be connected to outlet pipe on the drainpipe of said air preheater.
On the bottom of said tail vapour recycling can or defeated heat pipe, also be connected to the waste heat pipe.
Said air preheater connects pneumatic drier.
Said air preheater connects roller drier.
Said air preheater connects spray dryer.
The invention has the beneficial effects as follows: the tail vapour of pipe bundle drier stays heat and water through spray water mist, discharges on-condensible gas, thereby has improved heat exchange property; Reduce corrosivity, become thermal source capable of using, be particularly suitable for the air preheat of wet starch pneumatic conveying drying; Energy conservation and consumption reduction effects is outstanding; Economic benefit and environmental benefit very significantly, and have be skillfully constructed, advantage such as simple in structure, dependable performance, application prospect is very considerable.
Description of drawings
Fig. 1 is the front view of first kind of embodiment;
Fig. 2 is the front view of second kind of embodiment;
Fig. 3 is the front view of the third embodiment;
Fig. 4 is the front view of the 4th kind of embodiment;
Visible among the figure: pipe bundle drier tail vapour floss hole 1, tail vapour recycling can 2, spray head 3, blast pipe 4, water inlet pipe 5; Defeated heat pipe 6, air preheater 7, drainpipe 8, range of atomization 9, unhurried current layer 10; Heater 11, feeding mouth 12, pneumatic drier 13, exhaust outlet 14; Outlet pipe 15, waste heat pipe 16, roller drier 17, spray dryer 18.
The specific embodiment
Total design of the present invention is to install the tail gas recycle jar at the back additional at pipe bundle drier tail vapour floss hole, and in jar, is provided with spray head, and tail vapour is passed through in water smoke, and on-condensible gas is wherein discharged, and recovery heat and water are used for other and use hot device.Just list below and lift six embodiment.
First kind of embodiment: as shown in Figure 1; Back at pipe bundle drier increases a tail vapour recycling can (2); The bottom that tail vapour recycling can (2) is inserted in (1) is put in the tail vapour exhaust of pipe bundle drier; Tail vapour recycling can (2) top is connected to water inlet pipe (5), and water inlet pipe (5) gets in the jar and a plurality of spray heads (3) are housed.Tail vapour recycling can (2) upper end is provided with blast pipe (4), and the bottom is provided with defeated heat pipe (6), and defeated heat pipe (6) inserts a side of air preheater (7), and the opposite side of air preheater (7) picks out drainpipe (8).During work, open water inlet pipe (5), spray head (3) sprays water smoke downwards, and the tail vapour of pipe bundle drier is up with the water smoke contrary after getting in the jar, and the on-condensible gas in the tail vapour is gone out water smoke, discharges from blast pipe (4), and the steam chance falls to forming hot water under water.Experiment shows, nearly 100 ℃ of the exhaust temperature of pipe bundle drier obtains temperature and reaches the hot water more than 80 ℃ behind spray.Hot water gets into air preheater (7) through defeated heat pipe (6), through carrying out heat exchange with air, discharges from drainpipe (8) again.Air preheater (7) generally has two kinds of forms: the one, in many branch wind pipes are arranged, air therefrom passes through, and hot water passes through from airduct outside, can become hot blast to the air heat in the pipe.The 2nd, in many branching pipes are arranged, hot water passes through from water pipe, air passes through from water pipe outside, can obtain hot blast equally.Because air preheater (7) belongs to conventional equipment, so do not specify.The hot water on-condensible gas and the dissolved oxygen content that to be tail vapour form through handling that should draw attention here are few; Very easily carry out heat exchange with other media; And corrosivity significantly reduces; Become a kind of available heat sources, convert the cleaning hot blast to through air preheater (7) and deliver to the various parts that need.
Second kind of embodiment: as shown in Figure 2, the same bottom of inserting tail vapour recycling can (2) of the tail vapour floss hole (1) of pipe bundle drier with precedent.Different with precedent is to have increased unhurried current layer (10) in the below of tail vapour recycling can (2) the inside spray head (3).Unhurried current layer (10) is the tabular screen configuration of a kind of many spaces multilist face, and its effect is fluid is obstructed and passes through along zigzag path, to increase mutual contact and exchange opportunity.The concrete outcome of the unhurried current layer (10) here is optional a kind of in order to down:
1. process by multi-deck screen sheet or screen cloth.
2. bottom is the porous supporting plate, dispenser hard particles above the supporting plate.
3. the upper strata is the porous pressing plate, and bottom is the porous supporting plate, bulk storage light granules between pressing plate and the supporting plate.
Tail vapour for pipe bundle drier reclaims, and unhurried current layer (10) damping has his own strong points with atomizing exchange dual mode, therefore, and the composite construction that this example is recommended the employing dual mode and deposited.Promptly as shown in Figure 2, the layer (10) that will flow slowly spaces out with spray head (3), forms a range of atomization (9); Like this, tail vapour can toss about in bed at unhurried current layer (10) in uphill process; Again can be in the range of atomization (9) and water smoke intersect activity; Thereby the chance that more touching exchange is arranged forms hot water and drips, and discharges on-condensible gas simultaneously more completely.
The third embodiment: as shown in Figure 3, the same bottom of inserting tail vapour recycling can (2) of the tail vapour floss hole (1) of pipe bundle drier with precedent.The structure and the operation principle of tail vapour recycling can (2) are identical with precedent: spray head (3), blast pipe (4), water inlet pipe (5), defeated heat pipe (6), unhurried current layer parts such as (10) are arranged.Different with precedent is: pipe bundle drier tail vapour is used for the dry run of wet starch after tail vapour recycling can (2) reclaims.Specific practice is: air preheater (8) connects pneumatic drier (13) front end.In the middle of Starch Production, pipe bundle drier generally is used for the drying process of byproducts such as albumen powder, plumule, fiber, and pneumatic drier is used for the drying process of wet starch.Pneumatic drier (13) front end is provided with wet starch feeding mouth (12) and heater (11), and the back is provided with Waste gas outlet (14).This example increases a heater (11) in the back of air preheater (7), air preheater (8) is not if the hot blast of producing reaches and requires temperature then replenished by heater (11), and qualified hot blast and wet starch converge along the pipeline operation and with the wet starch drying.
The 4th kind of embodiment: as shown in Figure 4, this example is received the drainpipe of air preheater (7) (8) water inlet pipe (5) of tail vapour recycling can (2) again on the basis of the third embodiment, through the water of heat exchange as the spray water.In addition, on the drainpipe (8) of air preheater (7), also be connected to outlet pipe (15), when the spray water satisfied, unnecessary hot water can pass through outlet pipe (15) and discharge.On the bottom of tail vapour recycling can (2) or defeated heat pipe (6), also be connected to waste heat pipe (16).When residue appears in the hot water in jar, can be sent to other to hot water with the heat place through waste heat pipe (16).Certainly, also can pass through outlet pipe (15) discharges.
Experiment showed, the economic benefit and the emission reduction effect highly significant of technique scheme.Its experimental result meets following computational methods:
1. calculate wet starch dry run consumption quantity of steam: finished product starch moisture 13%; Dry matter content X=100%-13%=87% then; Wet starch water content 37% before the pneumatic conveying drying; Starch-containing amount Y=100%-37%=63%, the wet weight Z=X/Y=0.87/0.63=1.381 ton of finished product starch then per ton; The pneumatic drier dehydrating amount W=Z-1=1.381-1=0.381 ton of finished product starch then per ton is according to the statistical indicator of 1 ton of consumption of dehydration quantity of steam E=1.9 ton, 1 ton of starch air consumption Q=WE=0.381 * 1.9=0.7329 ton of then every production.(vapor (steam) temperature=130-150 ℃)
2. calculate the air consumption of the byproduct tube bank dry run of producing 1 ton of starch: by 1.49 tons of calculating of 1 ton of finished product starch mean consumption corn; Fiber, albumen powder, plumule yield account for the corn total amount 25%, moisture content 13% calculates; Byproduct total amount G=1.49 * 25% * 13%=0.323 ton; Moisture content 60% before dry; Weight in wet base S=G (1-60%)=0.323/40%=0.809 ton; Drying and dehydrating amount T=S-G=0.809-1.49 * 25%=0.809-0.372=0.437 ton, the statistical indicator of pressing the consumption quantity of steam E=1.4 ton of 1 ton of dehydration then has: air consumption R=TE=0.437 * 1.4=0.6118 ton of producing the byproduct tube bank dry run of 1 ton of starch.(vapor (steam) temperature=100 ℃).
3. produce the byproduct of 1 ton of starch and restrain the air consumption of dry run and the ratio=R/Q=0.6118/0.7329=83% of 1 ton of starch air consumption of every production; Promptly restrain dried tail gas and can satisfy 83% of the dry gas consumption of wet starch; Produce 1 ton of starch and only need replenish the 0.7329-0.6118=0.1211 ton; The steam that is replenished can reuse again, ton starch steam CER＞0.6118 ton.In this process, 80 ℃ water also will be heated to 130-150 ℃, also need certain energy consumption, but because the latent heat of steam is very big, and the required energy consumption of heating process is very little, removes this part consumption, the wet starch drying cost can reduce more than 50% still.
The 5th kind of embodiment: as shown in Figure 5, the same bottom of inserting tail vapour recycling can (2) of the tail vapour floss hole (1) of pipe bundle drier with precedent.The hot water of tail vapour recycling can (2) is produced hot blast through air preheater (7), and different is that the hot blast of generation inserts roller drier (17), carries out drying operation.
The 6th kind of embodiment: as shown in Figure 6, the same bottom of inserting tail vapour recycling can (2) of the tail vapour floss hole (1) of pipe bundle drier with precedent.The hot water of tail vapour recycling can (2) is produced hot blast through air preheater (7).Different is that the hot blast of generation inserts spray dryer (18), carries out drying operation.Purposes after the tail vapour of this example explanation pipe bundle drier reclaims is a lot.
Claims (10)
1. pipe bundle drier tail vapour-hot blast conversion equipment; It is characterized in that: the back of pipe bundle drier adds a kind of tail vapour recycling can (2), and the tail vapour floss hole of pipe bundle drier inserts tail vapour recycling can (2), and water inlet pipe (8) is inserted on tail vapour recycling can (2) top; Water inlet pipe (8) is connected to spray head (3) in jar; Spray head (3) top of tail vapour recycling can (2) is provided with blast pipe (4), and the bottom picks out defeated heat pipe (6), another termination air preheater (7) of defeated heat pipe (6).
2. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: the following installation of the interior spray head of said tail gas recycle jar (2) (3) has the unhurried current layer (10) of many penetrating holes.
3. pipe bundle drier tail vapour according to claim 2-hot blast conversion equipment is characterized in that: be provided with range of atomization (9) between the gentle fluid layer (10) of said spray head (3).
4. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: the said defeated heat pipe of a side joint of said air preheater (7) (6), the opposite side water pipe (8) that runs in.
5. pipe bundle drier tail vapour according to claim 4-hot blast conversion equipment is characterized in that: the water inlet pipe (5) of another termination tail vapour recycling can (2) of drainpipe (8) of said air preheater (7).
6. pipe bundle drier tail vapour according to claim 5-hot blast conversion equipment is characterized in that: also be connected to outlet pipe (15) on the drainpipe (8) of said air preheater (7).
7. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: on the bottom of said tail vapour recycling can (2) or defeated heat pipe (6), also be connected to waste heat pipe (16).
8. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: said air preheater (7) connects pneumatic drier (13).
9. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: said air preheater (7) connects roller drier (17).
10. pipe bundle drier tail vapour according to claim 1-hot blast conversion equipment is characterized in that: said air preheater (7) connects spray dryer (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110187842.9A CN102322734B (en) | 2011-07-06 | 2011-07-06 | End steam-hot air conversion device of pipe bundle drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110187842.9A CN102322734B (en) | 2011-07-06 | 2011-07-06 | End steam-hot air conversion device of pipe bundle drier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102322734A true CN102322734A (en) | 2012-01-18 |
| CN102322734B CN102322734B (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110187842.9A Expired - Fee Related CN102322734B (en) | 2011-07-06 | 2011-07-06 | End steam-hot air conversion device of pipe bundle drier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710147A (en) * | 2020-12-18 | 2021-04-27 | 安徽泰德康农业科技发展有限公司 | Waste heat recovery device of airflow dryer for drying modified starch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI974039A (en) * | 1997-10-24 | 1999-04-25 | Waertsilae Nsd Oy Ab | Method and arrangement for purifying the exhaust gases |
| US20030164309A1 (en) * | 2001-12-28 | 2003-09-04 | Omega Co., Ltd. | Method and device for deodorization and purification of exhaust gas or flue gas |
| CN201442912U (en) * | 2009-06-01 | 2010-04-28 | 邓亚东 | Starch airflow drying and tail gas reclaiming device |
| JP2011020091A (en) * | 2009-07-17 | 2011-02-03 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment apparatus |
| CN202141304U (en) * | 2011-07-06 | 2012-02-08 | 邓亚东 | Device converting tail steam to hot air for pipe bundle drier |
-
2011
- 2011-07-06 CN CN201110187842.9A patent/CN102322734B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI974039A (en) * | 1997-10-24 | 1999-04-25 | Waertsilae Nsd Oy Ab | Method and arrangement for purifying the exhaust gases |
| US20030164309A1 (en) * | 2001-12-28 | 2003-09-04 | Omega Co., Ltd. | Method and device for deodorization and purification of exhaust gas or flue gas |
| CN201442912U (en) * | 2009-06-01 | 2010-04-28 | 邓亚东 | Starch airflow drying and tail gas reclaiming device |
| JP2011020091A (en) * | 2009-07-17 | 2011-02-03 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment apparatus |
| CN202141304U (en) * | 2011-07-06 | 2012-02-08 | 邓亚东 | Device converting tail steam to hot air for pipe bundle drier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710147A (en) * | 2020-12-18 | 2021-04-27 | 安徽泰德康农业科技发展有限公司 | Waste heat recovery device of airflow dryer for drying modified starch |
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| CN102322734B (en) | 2014-06-04 |
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