CN103322787A - Flow-drying exhaust gas treatment device and method - Google Patents
Flow-drying exhaust gas treatment device and method Download PDFInfo
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- CN103322787A CN103322787A CN2013102684307A CN201310268430A CN103322787A CN 103322787 A CN103322787 A CN 103322787A CN 2013102684307 A CN2013102684307 A CN 2013102684307A CN 201310268430 A CN201310268430 A CN 201310268430A CN 103322787 A CN103322787 A CN 103322787A
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- heat exchanger
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- exhaust gas
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Abstract
The invention discloses a flow-drying exhaust gas treatment device and method. Exhaust gas enters a heat exchanger from an exhaust gas inlet pipe. The heat exchanger guides circulating water to cool through a circulating pump and a circulating water inlet pipe. Water on the upper portion of the heat exchanger is discharged through a hot water outlet pipe, and water on the lower potion of the heat exchanger flows to a circulating water tank through a circulating water return pipe. Condensate water generated by cooling the exhaust gas is discharged through a water collector at the bottom of the heat exchanger and a water outlet of a water outlet pipe. Flow of the circulating water is controlled to adjust the air temperature of the output of the heat exchanger to be lower than the temperature required by art. Heat-exchanged low-temperature air is transmitted to drying equipment through a lower-temperature air outlet. When the temperature of the exhaust gas inlet is lower than 35 DEG C, an ozone generator is turned on to guide ozone into a system; when the odor concentration at the lower-temperature air outlet is lower than 200 equivalents, the ozone generator is turned off, and a washing system is turned on to wash the heat exchanger. Harmful substances in the exhaust gas can be removed basically, and the discharged low-temperature gas can be used circularly.
Description
Technical field
The present invention relates to a kind of method and device of pneumatic conveying drying vent gas treatment, particularly the foul smell molecule in a kind of environmental protection oxidation Decomposition tail gas and method and the device of recycling residual heat.
Background technology
Higher by the dried tail gas temperature that pneumatic conveying dryer is discharged, can cause the thermal pollution to environment, cause the waste of thermal pollution and the energy simultaneously; And contain the foul smell molecule of multiple components in the tail gas, if directly discharging, the foul smell molecule pollutes the environment; Pneumatic conveying dryer institute required airflow is bigger, particularly the mephitis molecule of dried material can't be handled the pollution of environment, is by the discharging of water spray simple process substantially, and foul smell molecule complexity, mostly be organic matter greatly and be difficult to be dissolved in the water, treatment effect is invalid substantially.
Summary of the invention
Purpose of the present invention just provides a kind of pneumatic conveying drying exhaust gas processing device and method, can make that the harmful substance in the tail gas is removed substantially, and the low temperature exhaust gas of discharge recycles, and the waste heat by pneumatic conveying drying tail gas recycles and cuts down the consumption of energy.
A kind of pneumatic conveying drying exhaust gas processing device, comprise housing, be provided with heat exchanger in the housing, the housing upper end is connected with the tail gas air inlet pipe, the tail gas air inlet pipe is provided with the tonifying Qi entrance, the housing lower end connects the Cryogenic air outlet, and heat exchanger is provided with purging system, and the heat exchanger bottom also is provided with ozone generator.
Described purging system comprises the cleaning shower nozzle that is arranged on case top, cleans shower nozzle and connects water circulating pump by water pipeline, and housing bottom is provided with water collector, and water collector connects outlet conduit.
Described heat exchanger is provided with circulating water inlet, recirculated water return pipe and hot water outlet pipe, and circulating water inlet links to each other with the recirculated water return pipe, and circulating water inlet connects water circulating pump, and circulating water inlet is provided with by-pass valve control.
Described heat exchanger adopts finned heat exchanger tube.
The air inlet place of described tail gas air inlet pipe is provided with temperature measuring equipment; Described Cryogenic air outlet is provided with temperature-detecting device and odor concentration checkout gear.
The ozone pipeline of described ozone generator places the lower end of heat exchanger, and the heat exchanger lower end is provided with a plurality of entrances of ozone pipeline.
The heat exchanger lower end is provided with 4 entrances of ozone pipeline.
A kind of pneumatic conveying drying exhaust gas treating method, tail gas enters heat exchanger from the tail gas air inlet pipe, heat exchanger feeds the recirculated water cooling by water circulating pump and circulating water inlet, in the time of recirculated water process heat exchanger, the water on heat exchanger top is discharged by the hot water outlet pipe, the water of heat exchanger bottom flows into circulating water pool by the recirculated water return pipe, and the condensed water that produces during cooled exhaust gas is discharged by water collector and the outlet conduit delivery port of heat exchanger bottom; The flow of controlling recirculated water simultaneously is lower than the technological requirement temperature to regulate the air themperature of discharging heat exchanger exit, and the Cryogenic air after the heat exchange feeds drying equipment by the Cryogenic air outlet; When the tail gas air inlet temperature is lower than 35 ℃, open ozone generator, begin system is fed ozone, when Cryogenic air outlet odor concentration is that 200 equivalents are closed ozone generator when following, open purging system, the heat exchanging device cleans.
The air themperature of the low temperature exhaust gas outlet of described discharge heat exchanger is 30-55 ℃.
When being 30 ℃, described tail gas inlet temperature opens ozone generator.
The invention has the beneficial effects as follows:
1, by the high temperature gas flow dried tail gas is cooled to below 55 ℃, the moisture in the tail gas is removed relatively substantially, and the low temperature exhaust gas of discharge recycles, and the waste heat by pneumatic conveying drying tail gas recycles capable of reducing energy consumption;
2, near the tail gas air inlet, be provided with gas supplementing opening, make that whole pressure process is steady, not only be conducive to dry carrying out smoothly, more be conducive to the steady quality of dry products;
3, the ozone molecule that produces by ozone generator fully contacts with the tail gas molecule in drying equipment and the heat exchanger UNICOM space, ozone rely on its strong oxidizing property can rapid decomposable generation stink and the organic substance of other smell after reach deodorising effect, stink root substance decomposition is become innocuous substance, can reach zero effect of polluting basically.
Description of drawings.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the distribution map of heat exchanger lower end ozone pipeline.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As Fig. 1,2, a kind of pneumatic conveying drying exhaust gas processing device, comprise housing 20, be provided with heat exchanger 5 in the housing 20, housing 20 upper ends are connected with tail gas air inlet pipe 1, and tail gas air inlet pipe 1 is provided with tonifying Qi entrance 3, and housing 20 lower ends connect Cryogenic air outlet 9, heat exchanger 5 is provided with purging system, and heat exchanger 5 bottoms also are provided with ozone generator 10.Purging system comprises the cleaning shower nozzle 2 that is arranged on housing 20 tops, cleans shower nozzle 2 and connects water circulating pump 4 by water pipeline 12, and housing bottom is provided with water collector 13, and water collector connects outlet conduit 6.Heat exchanger 5 is provided with circulating water inlet 17, recirculated water return pipe 7 and hot water outlet pipe 8, and circulating water inlet 17 connects water circulating pump 4, and circulating water inlet 17 is provided with by-pass valve control 11.Heat exchanger adopts finned heat exchanger tube.The air inlet place of tail gas air inlet pipe 1 is provided with temperature measuring equipment; Cryogenic air outlet 9 is provided with temperature-detecting device and odor concentration checkout gear.The ozone pipeline of ozone generator places the lower end of heat exchanger, and the heat exchanger lower end is provided with 4 entrances of ozone pipeline.
General general about 100 ℃ tail gas enters heat exchanger 5 by tail gas air inlet pipe 1, water circulating pump 4 adds the recirculated water cooling by circulating water inlet 17 heat exchanging devices 5 simultaneously, recirculated water is through after the heat exchanger, the coolant-temperature gage on heat exchanger top is higher, it is discharged as the hot water reuse by hot water outlet pipe 8, the coolant-temperature gage of heat exchanger bottom is lower, and it flows into circulating water pool as the usefulness of cooling water by recirculated water return pipe 7; The condensed water that produces during cooled exhaust gas is discharged by water collector 13 and outlet conduit 6 delivery ports of heat exchanger bottom; In cooling, regulate the feasible air themperature of discharging the Cryogenic air outlet 9 of heat exchanger of the recirculated water water yield by the by-pass valve control 11 on the circulating water inlet 17 and control 30-55 ℃, Cryogenic air outlet is connected with the pressure fan entrance of drying equipment, and it is recycling that the tail gas that export 9 discharges from Cryogenic air are sent drying equipment back to again by the breeze fan of drying equipment; System's air pressure in running can produce fluctuation, enters gas supplementing opening before the heat exchanger by tail gas and goes into 3 and replenish air automatically, makes system's operation pressure stabilization; Air inlet place in the tail gas air inlet pipe arranges temperature measuring equipment, when the temperature T 1 of air inlet is lower than 35 ℃ (for example 30 ℃), start ozone generator 10, annotate ozone in the beginning heat exchanging device, export 9 places in Cryogenic air temperature-detecting device and odor concentration checkout gear are set, when exporting 9 odor concentrations, Cryogenic air shows that data are that 200 equivalents are when following, stop ozone generator work, and stop drying equipment breeze fan and air inducing blower fan, open purging system, namely open the valve 21 on the water pipeline 12, clean shower nozzle 2 from the top water spray of heat exchanger, the heat exchanging device cleans, and stops after three minutes; The waste water that cleans is discharged by water collector 13 and the outlet conduit 6 of bottom.
In order to stablize drying system air pressure balance in service, adopt the tonifying Qi entrance 3 between tail gas import and the heat exchanger, the assurance system is stable; Start ozone generator, ozone relies on its strong oxidizing property can decompose stink and other smell thereof of generation fast, and stink root substance decomposition is become innocuous substance, can reach zero-emission substantially; At the airborne foul smell molecule of ozone oxidation, incorporation time is 10 minutes, and usually the time should be 10 seconds, but it is longer to remove the time that the foul smell molecule on the equipment of being attached to needs.Reaching control by the purpose of heat exchanger 5 exhaust temperatures with adjusting the recirculated water water yield, is energy-conservation keys in the temperature T 2 of Cryogenic air outlet 9, can guarantee that drying equipment normally moves.Purging system, is removed wet dust by spray Cleaning for High Capacity removing the dust that heat exchanger 5 adheres to, and guarantees heat exchange efficiency.The cooled exhaust gas temperature of discharging as for Cryogenic air outlet 9 arranges, and calculates according to technological requirement and wet feed water content, finds a tail gas cooling point like this, reaches the minimizing quantity of circulating water and can guarantee the tail gas water content again.Air moisture content sees Table 1.Detect odor concentration employing odor concentration detector XP329IIIR in the tail gas, detect odor concentration by detecting a mouthful timing.
| Dew-point temperature ℃ | Water content g/m3 | Dew-point temperature ℃ | Water content g/m3 |
| 26 | 24.4 | 46 | 68.56 |
| 28 | 27.2 | 48 | 75.55 |
| 30 | 30.4 | 50 | 83.05 |
| 32 | 33.84 | 52 | 91.02 |
| 34 | 37.6 | 60 | 129.6 |
| 36 | 41.63 | 70 | 208.5 |
| 38 | 46.21 | 80 | 290.4 |
| 40 | 51.21 | 90 | 418.1 |
| 42 | 56.59 | 100 | 580.6 |
| 44 | 62.54 | ? | ? |
The water content of air under table 1. dew-point temperature
Claims (10)
1. pneumatic conveying drying exhaust gas processing device, it is characterized in that: comprise housing (20), be provided with heat exchanger (5) in the housing (20), housing (20) upper end is connected with tail gas air inlet pipe (1), tail gas air inlet pipe (1) is provided with tonifying Qi entrance (3), housing (20) lower end connects Cryogenic air outlet (9), and heat exchanger (5) is provided with purging system, and heat exchanger (5) bottom also is provided with ozone generator (10).
2. a kind of pneumatic conveying drying exhaust gas processing device according to claim 1, it is characterized in that: described purging system comprises the cleaning shower nozzle (2) that is arranged on housing (20) top, clean shower nozzle (2) and connect water circulating pump (4) by water pipeline (12), housing bottom is provided with water collector (13), and water collector connects outlet conduit (6).
3. a kind of pneumatic conveying drying exhaust gas processing device according to claim 2, it is characterized in that: described heat exchanger (5) is provided with circulating water inlet (17), recirculated water return pipe (7) and hot water outlet pipe (8), circulating water inlet (17) connects water circulating pump (4), and circulating water inlet (17) is provided with by-pass valve control (11).
4. a kind of pneumatic conveying drying exhaust gas processing device according to claim 3, it is characterized in that: described heat exchanger adopts finned heat exchanger tube.
5. a kind of pneumatic conveying drying exhaust gas processing device according to claim 3, it is characterized in that: the air inlet place of described tail gas air inlet pipe (1) is provided with temperature measuring equipment; Described Cryogenic air outlet (9) is provided with temperature-detecting device and odor concentration checkout gear.
6. a kind of pneumatic conveying drying exhaust gas processing device according to claim 3, it is characterized in that: the ozone pipeline of described ozone generator places the lower end of heat exchanger, and the heat exchanger lower end is provided with a plurality of entrances of ozone pipeline.
7. a kind of pneumatic conveying drying exhaust gas processing device according to claim 6, it is characterized in that: the heat exchanger lower end is provided with 4 entrances of ozone pipeline.
8. pneumatic conveying drying exhaust gas treating method, it is characterized in that: tail gas enters heat exchanger (5) from tail gas air inlet pipe (1), heat exchanger (5) feeds the recirculated water cooling by water circulating pump (4) and circulating water inlet (17), in the time of recirculated water process heat exchanger, the water on heat exchanger top is discharged by hot water outlet pipe (8), and the condensed water that produces during cooled exhaust gas is discharged by water collector (13) and outlet conduit (6) delivery port of heat exchanger bottom; The flow of controlling recirculated water simultaneously is lower than the technological requirement temperature to regulate the air themperature of discharging heat exchanger exit, and the Cryogenic air after the heat exchange feeds drying equipment by the Cryogenic air outlet; When the tail gas air inlet temperature is lower than 35 ℃, open ozone generator, begin system is fed ozone, when Cryogenic air outlet odor concentration is that 200 equivalents are closed ozone generator when following, open purging system, the heat exchanging device cleans.
9. pneumatic conveying drying exhaust gas treating method as claimed in claim 8 is characterized in that: the air themperature of the low temperature exhaust gas outlet of described discharge heat exchanger is 30-55 ℃.
10. pneumatic conveying drying exhaust gas treating method as claimed in claim 8 is characterized in that: open ozone generator when described tail gas inlet temperature is 30 ℃.
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| CN2013102684307A CN103322787A (en) | 2013-06-28 | 2013-06-28 | Flow-drying exhaust gas treatment device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106036770A (en) * | 2016-06-14 | 2016-10-26 | 大连盐化集团有限公司 | System and process for producing snowflake salt by aid of high-temperature hot-air and solar energy |
| CN109793113A (en) * | 2019-01-21 | 2019-05-24 | 常宁德邦生物科技有限公司 | A kind of production technology of high, the free of contamination iron-amino acid complex of biological value |
| CN110614015A (en) * | 2018-06-19 | 2019-12-27 | 英格索尔-兰德公司 | Gas-water separation system and method |
| CN114046636A (en) * | 2021-11-29 | 2022-02-15 | 湖南康捷生物科技有限公司 | Amylase drying equipment with prevent flying dust structure |
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| CN101543723A (en) * | 2009-05-08 | 2009-09-30 | 大连汪洋环境工程有限公司 | Device and process for processing nitrogen-oxide waste gas containing acidic gas |
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2013
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| JP2001280845A (en) * | 2000-03-31 | 2001-10-10 | Okawara Mfg Co Ltd | Condensation removing/preventing system and method for municipal waste drying facility |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106036770A (en) * | 2016-06-14 | 2016-10-26 | 大连盐化集团有限公司 | System and process for producing snowflake salt by aid of high-temperature hot-air and solar energy |
| CN110614015A (en) * | 2018-06-19 | 2019-12-27 | 英格索尔-兰德公司 | Gas-water separation system and method |
| CN109793113A (en) * | 2019-01-21 | 2019-05-24 | 常宁德邦生物科技有限公司 | A kind of production technology of high, the free of contamination iron-amino acid complex of biological value |
| CN114046636A (en) * | 2021-11-29 | 2022-02-15 | 湖南康捷生物科技有限公司 | Amylase drying equipment with prevent flying dust structure |
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Application publication date: 20130925 |