CN205138151U - Dry clean system of fodder - Google Patents
Dry clean system of fodder Download PDFInfo
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- CN205138151U CN205138151U CN201520754867.6U CN201520754867U CN205138151U CN 205138151 U CN205138151 U CN 205138151U CN 201520754867 U CN201520754867 U CN 201520754867U CN 205138151 U CN205138151 U CN 205138151U
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Abstract
The utility model relates to a dry clean system of fodder, including locating the desiccator between intake pipe and the blast pipe, be equipped with a filter unit between intake pipe and the desiccator, be equipped with the 2nd filter unit between desiccator and the blast pipe, a filter unit and the 2nd filter unit include at least one filtration that comprises the flexible porous metal film respectively. This dry clean system of fodder, simple structure, the thermal efficiency reach 95%, the gas -flow resistance is low, fodder drying efficiency is high, gaseous dustiness after the filtration is less than 5mgNm3, can be very big alleviate fodder and atmospheric pollution to reduce the dry loss that purifies the in -process fodder of whole fodder by a wide margin, simultaneously furthest the saving energy, reduced manufacturing cost.
Description
Technical field
The utility model relates to dry decontamination field, specifically a kind of feed dry decontamination system.
Background technology
In prior art, feed dry decontamination system is mainly by the high-temperature gas of temperature about 100 DEG C ~ 550 DEG C, pass into and be equipped with in the drying machine of feedstuff, utilize high-temperature gas to remove moisture unnecessary in feedstuff, so that the packaging of feed, transport, storage etc.In order to economize energy, the main high-temperature flue gas adopting the hot-blast stove in industrial production to produce at present, its temperature can reach 1000 DEG C and containing a large amount of dust and particle, meet the temperature requirement of feed drying, must lower the temperature to high-temperature flue gas and gas-solid separating and filtering.Existing gas cleaning mainly adopt filtration be the sack cleaner of fibrous material to carry out gas solid separation filtration, its serviceability temperature is less than 200 DEG C.Therefore high-temperature flue gas will be utilized to carry out feed drying, first need high-temperature flue gas to be passed into multi-stage heat exchanger and carry out heat exchange, cool to about 150 DEG C; Again the flue gas of temperature about 150 DEG C is carried out gas solid separation filtration by sack cleaner, inevitably because of thermal loss, temperature reduces (lower than 100 DEG C) to gas after filtration, this carries out heat exchange intensification with regard to needing the gas after by filtration to pass into multi-stage heat exchanger, thus meets the temperature requirement of feed drying; Carry out dried to feed, the gas containing feed dust is passed into sack cleaner and carries out gas solid separation filtration, reclaim containing after the feed in the gas of feed dust, by the gas discharging by sack cleaner in air.
As can be seen here, the feed dry decontamination system of prior art adopts multi-stage heat exchanger to carry out lowering the temperature or heating up, the thermal efficiency low (about 30% ~ 60%), and the adjustment of temperature is comparatively complicated; SR is large, and energy consumption is high, and system equipment is many, difficult in maintenance.Existing sack cleaner filtering accuracy is low, and the dustiness of flue gas after sack cleaner filters is greater than 80mg/Nm
3(i.e. 80 milligrams/standard cubic meter), can cause pollution to a certain degree to feed; Be discharged into also containing more feed dust in the gas in air from sack cleaner, feed loses serious and can pollute air; Further, because prior art is comparatively complicated to the adjustment of flue-gas temperature, and there is certain fluctuation in flue-gas temperature, even if consider control temperature when designing sack cleaner, also inevitable Yin Wendu is too high suddenly and cause the problem such as burning bag, filtration inefficiencies.In addition, the filtration of fibrous material easily causes dust at the surface aggregation of filtration, thus causes the filtration resistance of sack cleaner significantly to increase, and causes the whole efficiency of feed drying low.
Utility model content
It is simple that technical problem to be solved in the utility model is to provide a kind of structure, and the thermal efficiency can reach 95%, and gas-flow resistance is low, and feed drying efficiency is high, can alleviate greatly and produce to feed and air the feed dry decontamination system polluted.
Feed dry decontamination system of the present utility model, comprise the drying machine be located between air inlet pipe and blast pipe, the first filter element is provided with between air inlet pipe and drying machine, be provided with the second filter element between drying machine and blast pipe, the first filter element and the second filter element comprise at least one filtration be made up of flexible, porous metal film respectively.
When practical application, can utilize the existing equipments such as air blast that the high-temperature flue gas produced in industrial production (temperature of this flue gas should adapt with the temperature of feed dry decontamination) is led to the first filter element from air inlet pipe, carry out after gas solid separation filtration through the first filter element, dust in removing flue gas and particle, gas after filtration enters and is equipped with in the drying machine of feed, and moisture unnecessary in removing feed is to make feed dry; Finally, the gas containing feed dust of discharging from drying machine, carry out discharging from blast pipe after gas solid separation filtration through the second filter element, the feed in the described gas containing feed dust is recovered in the second filter element.
Described filtration is made up of flexible, porous metal film, this flexible, porous metal film can adopt application number to be that the preparation method of the flexible, porous metal forming recorded in the Chinese patent application of 201510153116.3 makes, or adopts other similar approach existing to make.After tested, filtration obtained like this, its heat resistance is good, can bear the high temperature of 550 DEG C, and heat-conductive characteristic is stablized, temperature due to feed dry decontamination is 100 DEG C ~ 550 DEG C, therefore without the need to carrying out heat exchange intensification to the gas after the first filter element filters, carry out heat exchange, the structure that the application has higher efficiency and more simplifies relative to the existing multi-stage heat exchanger that utilizes, thus it is little to reduce thermal loss greatly, makes the overall thermal efficiency of feed dry decontamination reach 95%; And the regeneration easy to clean of this filtration, long service life, also saves a large amount of financial cost thus; In addition, after tested, the air flux of this filtration can reach 2000m
3/ h, gas-flow resistance is low, and the rate of filtration is fast, can improve the efficiency of whole feed dry decontamination greatly; Filtering accuracy can reach 0.1 μm, dust and the particle of in flue gas more than 99.99% can be filtered, and by containing in the gas of feed dust 99.99% feed dust intercept at the second filter element, the gas dust content after the first filter element and the second filter element filter is less than 5mg/Nm
3, thus significantly alleviate the pollution to feed and air, reclaim a large amount of described containing the feed in the gas of feed dust, greatly reduce the loss of feed in whole feed dry decontamination process.Feed dry decontamination system of the present utility model, structure is simple, and the thermal efficiency can reach 95%, and gas-flow resistance is low, and feed drying efficiency is high, can alleviate greatly and produce pollution to feed and air, and significantly reduce the loss of feed in whole feed dry decontamination process.
Preferably, between the first filter element and drying machine, be also provided with the first air-introduced machine, between the second filter element and blast pipe, be provided with the second air-introduced machine.Flue gas can be pumped to the first filter element by described first air-introduced machine, and make the first filter element be in negative pressure state, flue gas carries out gas solid separation filtration by the first filter element, and the gas after filtration is discharged from the first filter element and towards the drying machine that feed is housed, carried out drying to feed.Similar, the effect of the second air-introduced machine is that the gas containing feed dust in drying machine is drawn into the second filter element, under the effect of the second filter element, gas solid separation filtration is carried out to the gas containing feed dust, reclaim containing the feed in the gas of feed dust and reduce air pollution.Utilize the first air-introduced machine and the second air-introduced machine to carry out air inducing to the first filter element and the second filter element respectively, the filter efficiency of the first filter element and the second filter element can greatly be improved, thus improve the overall efficiency of feed dry decontamination; And relative to only arranging an air-introduced machine, the thermal loss that gas causes because of long distance flowing can be reduced, thus the temperature of convenient control feed dry decontamination, and ensure that the effect of feed dry decontamination is better.Described first air-introduced machine and the second air-introduced machine are existing device or equipment, for the common air blast from inlet end to relevant device input air or flue gas, there is good high-temperature stability, and better air inducing effect can be played, reduce the adjustment to flue gas or the gas temperature after filtering, be conducive to the structure simplifying the utility model feed dry decontamination system, and cost-saving further.
Due in actual production, the import and export of usual first filter element, the second filter element overdraught are relative to less itself section, the import and export of drying machine overdraught are also less relative to the section of drying machine itself, therefore when air-flow enters into larger space from less import, the gas shock of easy generation eddy current and offset direction or air pulse, Velocity Profiles is uneven, gas-flow resistance can be made so to a certain extent to increase, thus cause overall filtration and drying efficiency to reduce.Therefore in order to cut down air turbulence phenomenon, improve the quality of air flow method, thus improve the efficiency of filter efficiency and overall feed dry decontamination, except adjustment air-flow is imported and exported with except the first filter element, the second filter element or the ratio of the section of drying machine own and the mode of shape, preferably between described air inlet pipe and blast pipe, be provided with airflow distribution device, under the effect of airflow distribution device, make flue gas and distribute containing the gas uniform of feed dust.
Described airflow distribution device can be existing device or equipment, and also can be the structure comprising at least two airflow-distribution boards, described airflow-distribution board be located at the inlet end of the first filter element and the second filter element.Described airflow-distribution board can comprise existing distribution grid and be located at deflector on distribution grid, described distribution grid be provided with multiple can the perforate that flows through of air feed, and reached the object of airflow uniform distribution by the position and quantity adjusting deflector.
Further, the first filter element is also respectively equipped with the back-blowing device corresponding with filtration with the second filter element.Carry out in the process of filtering at the first filter element and the second filter element, the dust that is blocked part gravitate and drop to bottom the first filter element and the second filter element, another part can be attached to filtration surface.Along with the growth of service time, the dust quantity that filtration adheres to is on the increase, filtration resistance will rise, when reaching certain numerical value, described back-blowing device can carry out blowback dedusting to filtration, for the use of the long-time stable of filtration provides safeguard, make it can not cause filtration inefficiencies because filtration resistance is excessive.
Concrete, above-mentioned back-blowing device can comprise blowback pipeline, and the pulse valve be connected with blowback pipeline.Such as, can according to concrete operating mode, utilize the existing time relay to arrange the corresponding pulse period, when the time reaches setting value, pulse valve is opened, and the purge gas in back-blowing device enters blowback pipeline and carries out blowback dedusting to filtration, and the dust that filtration gathers is come off rapidly under the effect of purge gas, thus reduction filtration resistance, or recover the filter capacity of filtration.Gas after the preferred smoke filtration of purge gas carries out blowback, with economize energy; In addition, conventional compressed air or compressed nitrogen also can be adopted to carry out blowback.
Preferably, above-mentioned pulse valve is connected with existing pressure-detecting device, pressure-detecting device is utilized automatically to detect the force value of actual motion in the first filter element and the second filter element, the size of current filtration resistance can be judged, namely force value is larger, corresponding filtration resistance is larger, when force value reaches upper pressure limit (such as: the empirical data 1500Pa ~ 2000Pa of practical operation) that preset, pulse valve is opened, purge gas in back-blowing device enters blowback pipeline and carries out blowback dedusting to filtration, the dust that filtration gathers is come off rapidly under the effect of purge gas, thus reduction filtration resistance.Carrying out blowback dedusting relative to rule of thumb presetting the time, having more specific aim, ensureing all the time, under the prerequisite that the filtration resistance of filtration is less, the number of times of blowback dedusting to be reduced to a certain extent, economize energy.
Further, the aperture of described filtration is 0.05 ~ 50 μm, and porosity is 40% ~ 70%, and thickness is 200 ~ 2000 μm.After tested, the filter efficiency of this filtration is high, and filtration resistance is little, and filtration flux is large, filtering accuracy higher (can reach 0.1 μm), and working strength is high, even if still can keep good filter effect after repeatedly cleaning.
According to different working conditions, filtration can also be provided with support cages bone, thus improves overall intensity, makes filtration not yielding or damage in filtration, blowback and clean process.
Further, the residual neat recovering system that flue-gas temperature can be adjusted to 100 DEG C ~ 550 DEG C is provided with between described air inlet pipe and the first filter element.Described residual neat recovering system can comprise existing waste heat steam boiler equipment or waste heat power generation equipment etc., the high-temperature flue gas entering air inlet pipe from hot-blast stove can be made full use of (such as produce vapours or generate electricity etc.), reach the object of energy-conserving and environment-protective, and realize sensible heat utilization by residual neat recovering system, to the adjustment of flue-gas temperature.In addition, also can control the temperature difference within 5 DEG C by residual neat recovering system, the temperature of feed dry decontamination is more stable, and dry decontamination effect is better.
Feed dry decontamination system of the present utility model, structure is simple, and the thermal efficiency can reach 95%, and gas-flow resistance is low, and feed drying efficiency is high, and the gas dust content after filtration is less than 5mg/Nm
3, the pollution to feed and air can greatly be alleviated, and significantly reduce the loss of feed in whole feed dry decontamination process, save the energy to greatest extent simultaneously, reduced production cost.
Below in conjunction with the detailed description of the invention of embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following example.Do not departing from the above-mentioned technological thought situation of the utility model, the various replacement made according to ordinary skill knowledge and customary means or change, all should be included in scope of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model feed dry decontamination system.
Detailed description of the invention
As shown in Figure 1, feed dry decontamination system of the present utility model, comprise the drying machine 4 be located between air inlet pipe 1 and blast pipe 7, the first filter element 2 is provided with between air inlet pipe 1 and drying machine 4, the second filter element 5, first filter element 2 is provided with and the second filter element 5 comprises at least one filtration 21 be made up of flexible, porous metal film respectively between drying machine 4 and blast pipe 7.
Described filtration 21 is made up of flexible, porous metal film, has good flexibility, therefore according to different working conditions, filtration 21 can also be provided with support cages bone, thus improves overall intensity, does not make filtration 21 yielding or damage.The aperture of described filtration 21 is 0.05 ~ 50 μm, porosity is 40% ~ 70%, thickness is 200 ~ 2000 μm, its heat resistance is good, the high temperature of 550 DEG C can be born, heat-conductive characteristic is stablized, temperature due to feed dry decontamination is 100 DEG C ~ 550 DEG C, therefore without the need to carrying out heat exchange intensification to the gas after the first filter element 2 filters, heat exchange is carried out relative to the existing multi-stage heat exchanger that utilizes, the structure that the application has higher efficiency and more simplifies, thus it is little to reduce thermal loss greatly, the overall thermal efficiency of feed dry decontamination is made to reach 95%, and the regeneration easy to clean of this filtration 21, long service life, also saves a large amount of financial cost thus, in addition, the air flux of this filtration 21 can reach 2000m
3/ h, gas-flow resistance is low, and the rate of filtration is fast, can improve the efficiency of whole feed dry decontamination greatly, filtering accuracy can reach 0.1 μm, and the gas dust content after the first filter element 2 filters and the second filter element 5 filters is less than 5mg/Nm
3dust and the particle of in flue gas more than 99.99% can be filtered, and by containing feed dust gas in 99.99% feed dust intercept at the second filter element 5, thus the pollution significantly alleviated feed and air, reclaim a large amount of described containing the feed in the gas of feed dust, greatly reduce the loss of feed in whole feed dry decontamination process.
First filter element 2 and the second filter element 5 are also respectively equipped with the back-blowing device corresponding with filtration 21.Described back-blowing device comprises blowback pipeline 22, and the pulse valve 23 be connected with blowback pipeline 22.Described pulse valve 23 is connected with existing pressure-detecting device 24.Along with the growth of service time, on filtration 21, the dust quantity of attachment is on the increase, filtration resistance will rise, the force value that pressure-detecting device 24 detects actual motion in the first filter element 2 and the second filter element 5 automatically also becomes large thereupon, when force value reaches upper pressure limit (such as: the empirical data 1500Pa ~ 2000Pa of practical operation) that preset, pulse valve 23 is opened, purge gas in back-blowing device enters blowback pipeline 22 and carries out blowback dedusting to filtration 21, the dust that filtration 21 gathers is come off rapidly under the effect of purge gas, thus reduction filtration resistance.Purge gas can adopt the gas after filtration to carry out blowback, with economize energy; In addition, conventional compressed air or compressed nitrogen also can be adopted to carry out blowback.
Existing residual neat recovering system 8 is provided with between air inlet pipe 1 and the first filter element 2, described residual neat recovering system 8 can comprise existing waste heat steam boiler equipment or waste heat power generation equipment etc., the high-temperature flue gas entering air inlet pipe 1 from hot-blast stove is made full use of (such as produce vapours or generate electricity etc.), reach the object of energy-conserving and environment-protective, and realize sensible heat utilization by residual neat recovering system 8, to the adjustment of flue-gas temperature.According to different feed dry decontamination requirements, it is 100 DEG C ~ 550 DEG C by the temperature of the adjustable flue gas of residual neat recovering system 8, and control the temperature difference within 5 DEG C, meet the temperature requirement of feed dry decontamination and the serviceability temperature requirement of the first filter element 2, make the temperature of feed dry decontamination more stable, dry decontamination effect is better.
Be provided with the first air-introduced machine 3 between first filter element 2 and drying machine 4, the exhaust end (namely between the second filter element 5 and blast pipe 7) of described second filter element 5 is also provided with the second air-introduced machine 6.Flue gas can be pumped to the first filter element 2 by described first air-introduced machine 3, and make the first filter element 2 be in negative pressure state, flue gas carries out gas solid separation filtration by the first filter element 2, gas after filtration is discharged from the first filter element 2 and towards the drying machine 4 that feed is housed, is carried out drying to feed.Similar, the effect of the second air-introduced machine 6 is that the gas containing feed dust in drying machine 4 is drawn into the second filter element 5, under the effect of the second filter element 5, gas solid separation filtration is carried out to the gas containing feed dust, reclaim containing the feed in the gas of feed dust and reduce air pollution.Utilize the first air-introduced machine 3 and the second air-introduced machine 6 to carry out air inducing to the first filter element 2 and the second filter element 5 respectively, the filter efficiency of the first filter element 2 and the second filter element 5 can greatly be improved, thus improve the overall efficiency of feed dry decontamination; And relative to only arranging an air-introduced machine, the thermal loss that gas causes because of long distance flowing can be reduced, thus the temperature of convenient control feed dry decontamination, and ensure that the effect of feed dry decontamination is better.Described first air-introduced machine 3 and the second air-introduced machine 6 are existing device or equipment, for the common air blast from inlet end to relevant device input air or flue gas, there is good high-temperature stability, the operating temperature of about 250 DEG C can be born, use in feed dry decontamination process, better air inducing effect can be played and the adjustment to flue gas or the gas temperature after filtering can be reduced, being conducive to the operation simplifying feed dry decontamination, and saving production cost further.
Between air inlet pipe 1 and blast pipe 7, corresponding airflow distribution device is set, described airflow distribution device is the airflow-distribution board (not shown) being arranged on the first filter element 2, second filter element 5 or drying machine 4 air inlet, described airflow-distribution board can comprise existing distribution grid and be located at the deflector on distribution grid, described distribution grid be provided with multiple can the perforate that flows through of air feed, and reached the object of airflow uniform distribution by the position and quantity adjusting deflector.
Above-mentioned feed dry decontamination system of the present utility model (airflow direction reference as shown by the arrows in Figure 1), from the high-temperature flue gas that air inlet pipe 1 enters, through residual neat recovering system 8 carry out UTILIZATION OF VESIDUAL HEAT IN go forward side by side trip temperature regulate after, under the effect of the first air-introduced machine 3, make flue gas lead to the first filter element 2 carry out gas solid separation filtration, dust in removing flue gas and particle, and the gas after filtering is led to drying machine 4; The gas after filtering is utilized to carry out drying to the feed in drying machine 4; Then, under the effect of the second air-introduced machine 6, led to after the second filter element 5 carries out gas solid separation filtration by the gas containing feed dust and discharge from blast pipe 7, the feed in the described gas containing feed dust is recovered in the second filter element 5.This system, structure is simple, and the thermal efficiency can reach 95%, and gas-flow resistance is low, and feed drying efficiency is high, and the gas dust content after filtration is less than 5mg/Nm
3, the pollution to feed and air can greatly be alleviated, and significantly reduce the loss of feed in whole feed dry decontamination process, save the energy to greatest extent simultaneously, reduced production cost.
Claims (10)
1. feed dry decontamination system, comprise the drying machine (4) be located between air inlet pipe (1) and blast pipe (7), it is characterized in that being provided with the first filter element (2) between air inlet pipe (1) and drying machine (4), be provided with the second filter element (5) between drying machine (4) and blast pipe (7), the first filter element (2) and the second filter element (5) comprise at least one filtration be made up of flexible, porous metal film (21) respectively.
2. feed dry decontamination system as claimed in claim 1, it is characterized in that also being provided with the first air-introduced machine (3) between the first filter element (2) and drying machine (4), between the second filter element (5) and blast pipe (7), be provided with the second air-introduced machine (6).
3. feed dry decontamination system as claimed in claim 1, is characterized in that also being provided with airflow distribution device between air inlet pipe (1) and blast pipe (7).
4. feed dry decontamination system as claimed in claim 3, it is characterized in that described airflow distribution device comprises at least two airflow-distribution boards, described airflow-distribution board is located at the inlet end of the first filter element (2) and the second filter element (5).
5. feed dry decontamination system as claimed in claim 1, is characterized in that the first filter element (2) and the second filter element (5) are also respectively equipped with the back-blowing device corresponding with filtration (21).
6. feed dry decontamination system as claimed in claim 5, is characterized in that described back-blowing device comprises blowback pipeline (22), and the pulse valve (23) be connected with blowback pipeline (22).
7. feed dry decontamination system as claimed in claim 6, is characterized in that described pulse valve (23) is connected with pressure-detecting device (24).
8. feed dry decontamination system as claimed in claim 1, it is characterized in that the aperture of described filtration (21) is 0.05 ~ 50 μm, porosity is 40% ~ 70%, and thickness is 200 ~ 2000 μm.
9. feed dry decontamination system as claimed in claim 8, is characterized in that described filtration (21) is also provided with support cages bone.
10. the feed dry decontamination system as described in one of claim 1 to 9, is characterized in that being provided with residual neat recovering system (8) between air inlet pipe (1) and the first filter element (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754867.6U CN205138151U (en) | 2015-09-28 | 2015-09-28 | Dry clean system of fodder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754867.6U CN205138151U (en) | 2015-09-28 | 2015-09-28 | Dry clean system of fodder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205138151U true CN205138151U (en) | 2016-04-06 |
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ID=55623937
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520754867.6U Active CN205138151U (en) | 2015-09-28 | 2015-09-28 | Dry clean system of fodder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205138151U (en) |
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2015
- 2015-09-28 CN CN201520754867.6U patent/CN205138151U/en active Active
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