CN208003656U - Mechanical ventilation type tower top treating flour dust retracting device - Google Patents
Mechanical ventilation type tower top treating flour dust retracting device Download PDFInfo
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- CN208003656U CN208003656U CN201820052613.3U CN201820052613U CN208003656U CN 208003656 U CN208003656 U CN 208003656U CN 201820052613 U CN201820052613 U CN 201820052613U CN 208003656 U CN208003656 U CN 208003656U
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Abstract
The utility model discloses a kind of mechanical ventilation type tower top treating flour dust retracting devices, including device for recovering powder shell, shell lower end, which is equipped with, collects liquid bath, cycle liquid bath, recycle liquid pump, fluid infusion pump, supplement liquid pipeline and circulation fluid filtration device, collects liquid bath and is connected by downspout with cycle liquid bath；Shell is provided, in sequence from bottom to top, with circulation fluid flow-guiding screen, column plate even gas distribution device, primary wash mill, high-efficient washing device, composite efficient demister；Cycle liquid bath is connected with circulation fluid first layer spray atomizing cloth liquid component, circulation fluid second layer spray atomizing cloth liquid component and circulation fluid drain nozzle respectively by recycle liquid pump；Supplement liquid pipeline is connected with high-efficient washing spray atomizing cloth liquid component, composite efficient demisting spray atomizing cloth liquid component and circulating slot fluid infusion nozzle respectively by fluid infusion pump.The utility model efficiently can thoroughly solve the problems, such as granulation tower dust emission, reach ultra-clean emission request.
Description
Technical field
The utility model belongs to environmental technology field, is related to a kind of in urea/ammonium nitrate high-tower granulation production process
Dust emission mechanical ventilation type tower top treating flour dust retracting device not up to standard.
Background technology
Currently, China's nitrogen fertilizer production mostly uses natural ventilation type high-tower granulation, which is sprayed by granulation tower top spray head
Fused materials, high-altitude sedimentation forms nitrogenous fertilizer grain products through equal temperature technique of circulation to material under the effect of gravity.In granulation process
In due to some inevitable factors such as nozzle injection, chemical reaction, high temperature heat exchange and mechanical collision formed material dusts with
Tail gas is disposed in air.And according to production technology or the difference of device, general dust actual discharge value is often as high as 100-
500mg/N.m3, significantly larger than national existing limit value 30mg/N.m3Index, not only pollute and environment but also cause stock product
Severe attrition waste.As China's on January 1st, 2015 is new《Environmental law》Promulgation and a series of new pollutant emission states
The improvement of the implementation of family's standard, this kind of pollution sources has become regulation mandatory requirement, and Environment Pollution Event has become the whole society
Focus.
With the increasing of the stringent and implementation dynamics of national environmental protection policy, many enterprises limit the production because of dust emission problem
Or order halt production.Therefore, Some Enterprises have used wet scrubbing technology to carry out dust recycling transformation, the technology dust removing effects one
As, and entrainment is serious.It is most commonly seen to purify dust-containing tail gas wet sprinkling to be taken in tower top, i.e., at the top of granulation tower at present
Inversely spraying washing and filler demisting are directly carried out, this technology can increase granulation tower ventilation since tower body thermal head is smaller
Resistance causes tower interior air-flow to be blocked, and ventilation is unsmooth, and finished particle temperature is caused to increase, and leads to product caking adhesion, sternly
Ghost image rings the quality of product.This cleaning dust device gravity-flow ventilation air draft form smaller due to being limited to thermal head, washing
Filter element simple in structure, pressure drop is smaller can only be used with demister system, clean emission effect is nearly all not achieved, because washing
The tail gas for being not thorough and carrying secretly a large amount of material drop is washed, the gas containing a large amount of corrosivity drops is discharged into ambient atmosphere, not only
Environmental pollution, material waste are caused, and damages machinery equipment, building, soil and the health on periphery.Domestic existing powder
Dirt recovery technology refers to Fig. 1.Major technique is spray washing and folded plate demisting, which is gravity-flow ventilation form, washs and removes
Fog effect is general, is unable to environmental requirement, influences product quality and production capacity.
Not up to standard in face of environmentally friendly dust emission, enterprise's significant loss and product quality problem, enterprise have to continuous right
Granulation tower device for recovering powder is transformed upgrading, a large amount of people of waste enterprise, object, financial resources.Therefore, high-tower granulation field is badly in need of looking for
It can put things right once and for all to one kind, can thoroughly solve the problems, such as the new technology of granulation tower dust emission.
Utility model content
The purpose of this utility model is that existing Industry and existing device for recovering powder there are the problem of solved
Certainly, a kind of mechanical ventilation type tower top treating flour dust retracting device is provided, which efficiently can thoroughly solve granulation tower dust row
Put problem.
The technical scheme in the invention for solving the above technical problem is as follows：
A kind of mechanical ventilation type tower top treating flour dust retracting device, including device for recovering powder shell, the air inlet of shell lower end
Mouth and upper end gas outlet；It is characterized in that upper end gas outlet upper end is equipped with the air-introduced machine for force ventilation；Under the shell
End, which is equipped with, collects liquid bath, cycle liquid bath, recycle liquid pump, fluid infusion pump, supplement liquid pipeline and circulation fluid filtration device, the collection liquid
Slot is connected with cycle liquid bath by downspout；Shell be provided, in sequence from bottom to top, with circulation fluid flow-guiding screen, column plate even gas distribution device,
Primary wash mill, high-efficient washing device, composite efficient demister；The cycle liquid bath by recycle liquid pump respectively with follow
Ring liquid first layer spray atomizing cloth liquid component, circulation fluid second layer spray atomizing cloth liquid component and circulation fluid drain nozzle are connected
It connects；The supplement liquid pipeline is pumped by fluid infusion and removes mist spray with high-efficient washing spray atomizing cloth liquid component, composite efficient respectively
Atomizing irrigation component and circulating slot fluid infusion nozzle are connected, and can realize three's free switching according to live actual condition.
As an improvement, being equipped at the top of air-introduced machine for preventing external impurities from entering the anti-of the treating flour dust retracting device
Shield.
As an improvement, being provided with the circulation fluid flow-guiding screen for preventing circulation fluid splash between housing bottom and collection liquid bath.
As an improvement, nozzle blocks in order to prevent, set before the recycle liquid pump being connected with spray atomizing liquid distribution system
There is filtering to intercept the circulation fluid filtration device of solid impurity in liquid.
As an improvement, being equipped with circulation fluid drain pipe in recycle liquid pump outlet.
As an improvement, being equipped with column plate even gas distribution device between circulation fluid flow-guiding screen and primary wash mill, ensure dust-laden
Gas is uniformly distributed, promotes subsequent technique Effec-tive Function.
As an improvement, being equipped with the heating device for adjusting circulation fluid temperature in recycling liquid bath.
As an improvement, being equipped with primary wash mill, high-efficient washing device in treating flour dust retracting device shell, thoroughly wash
Wash material dust in ash-laden gas；
As an improvement, being equipped with composite efficient demister in treating flour dust retracting device shell, thoroughly removing intercepts
The corrosive materials drop carried in gas；
As an improvement, washing nozzle takes into account cloth liquid and spray washing double effects, control nozzle spray angles, spray pressure
Etc. parameters, select the spray nozzle of different atomizing particle sizes (droplet particles diameter after spray), realize the effect of multiple wash；
As an improvement, the design principle of railroad bridge truss is used for reference in each system component support in shell, design, which is selected, to be had
The ladder shape truss support beam that intensity is high, amount of deflection is small.
The effect of the utility model
Compared with prior art, the utility model is provided with using the air inlet in shell lower end and is led to circulation fluid water conservancy diversion
Drift net and column plate even gas distribution device, prevent the circulation fluid of free-falling to be splashed on the finished product raw material of bottom of tower, influence product quality；
Primary wet scrubbing is carried out to the ash-laden gas for entering dust recycling and administration device simultaneously and gas is uniformly distributed, mitigates down-stream system
Processing load.Ash-laden gas after column plate even gas distribution device passes through connecing for gas, liquid, solid three-phase into primary washing unit
Mass transfer is touched, most of dust in dusty gas is washed to be separated；Later, ash-laden gas and the certain density material of carrying
Drop passes through two layers of spray atomizing cloth liquid zone, and the circulation fluid by spray is further to the dust progress gas-liquid mixed in gas
Washing separation；Finally, by the absorption of high-efficient washing system and spray atomizing cloth liquid component, thoroughly washing, which is isolated in gas, takes
The material dust of band.
For dust recycling and administration device, it is crucial that can the dust that is carried in gas, which wash and separate, but is filled
The defogging effect quality set directly determines the final effect of device, it is however generally that, clean gas carries greatly after washing
The high concentration material solution droplets of amount are divided if demister system cannot effectively intercept the high concentration entrainment carried in gas
It is that the form of liquid is switched to as outer exhaust is discharged in air by solid-state from, the dust carried in that gas, stock product
While loss, cause greatly to pollute environment.The utility model knows very well traditional technology that cannot efficiently solve in outer last person's gas
Therefore entrainment problem is arranged the air inducing form of force ventilation, overcomes apparatus system resistance, utilize composite efficient demisting
The demisting form of device combination spray atomizing cloth liquid component thoroughly solves the problems, such as that entrainment, effective recovered material product lose,
Reach ultra-clean emission request.
From technological flow analysis：
Increase circulation fluid filtration device (10) in recycle liquid pump (7) front end, prevents solid impurity in liquid from blocking nozzle, cause
The damage of pump.It is exported in recycle liquid pump (7) and increases circulation fluid drain pipe (7-c), prevent nozzle blocking from causing loine pressure excessive
Or circulating slot liquid level is too low, and pump is caused to dally.The heating device for adjusting circulation fluid temperature is equipped in cycle liquid bath (6).
From Performance Analysis：
Description of the drawings
Fig. 1 is domestic conventional wet washing process schematic diagram.
Fig. 2 is mechanical ventilation type tower top treating flour dust retracting device structural schematic diagram.
Fig. 3 is spray atomizing cloth liquid effect diagram.
Fig. 4 is spray atomizing cloth liquid type selecting parameter list.
Drawing reference numeral：Shell 1, circulation fluid flow-guiding screen 1-1, primary wash mill 1-3, column plate even gas distribution device 1-2, air inlet
Mouth 2, air-introduced machine 4, collects liquid bath 5, downspout 5-1, cycle liquid bath 6, recycle liquid pump 7, first layer spray atomizing cloth at gas outlet 3
Liquid component 7-a, second layer spray atomizing cloth liquid component 7-b, circulation fluid drain pipe 7-c, fluid infusion pump 8, high-efficient washing spray atomizing
Cloth liquid component 8-a, it composite efficient demisting spray atomizing cloth liquid component 8-b, circulating slot liquid supplementation pipe 8-c, supplement liquid pipeline 9, follows
Ring liquid filter 10.
Specific implementation mode
As shown in Fig. 2, a kind of mechanical ventilation type tower top treating flour dust retracting device, including device for recovering powder shell 1, shell
1 lower end air inlet 2 of body and upper end gas outlet 3；3 upper end of upper end gas outlet is equipped with the air-introduced machine 4 for force ventilation；It is described
1 lower end of shell, which is equipped with, collects liquid bath 5, cycle liquid bath 6, recycle liquid pump 7, fluid infusion pump 8, supplement liquid pipeline 9 and circulation fluid filtration
Device 10, the collection liquid bath 5 are connected with cycle liquid bath 6 by downspout 5-1；Shell 1 is provided, in sequence from bottom to top, with circulation fluid
Flow-guiding screen 1-1, column plate even gas distribution device 1-2, primary wash mill 1-3, high-efficient washing device 1-4, composite efficient demisting dress
Set 1-5；The cycle liquid bath 6 by recycle liquid pump 7 respectively with circulation fluid first layer spray atomizing cloth liquid component 7-a, circulation fluid
7-c mouthfuls of second layer spray atomizing cloth liquid component 7-b and circulation fluid drain pipe are connected；To save equipment investment and reducing energy
Consumption, the supplement liquid pipeline 9 by fluid infusion pump 8 respectively with high-efficient washing spray atomizing cloth liquid component 8-a, composite efficient demisting
8-c mouthfuls of spray atomizing cloth liquid component 8-b and circulating slot liquid supplementation pipe are connected.
It is equipped with the protective cover 4-1 for preventing external impurities from entering the treating flour dust retracting device at 4 top of air-introduced machine.
Being provided between 1 bottom of shell and collection liquid bath 5 prevents the circulation fluid flow-guiding screen 1-1 of circulation fluid splash.
Increase circulation fluid filtration device 10 in 7 front end of recycle liquid pump, filtering intercepts solid impurity in liquid, prevents solid in liquid
Body impurity blocks nozzle, causes the damage of pump.
It is equipped with circulation fluid drain pipe 7-c in the outlet of recycle liquid pump 7.
It is equipped with column plate even gas distribution device 1-2 between circulation fluid flow-guiding screen 1-1 and primary wash mill 1-3, ensures dust-laden
Gas is uniformly distributed, promotes subsequent technique Effec-tive Function.
As shown in figure 3, from will be seen that corresponding spray is straight under spray assemblies different height and certain spray angles in figure
Diameter and sprinkle density, and then provide optimum optimization scheme, the choosing of spray atomizing component for the design selection of spray atomizing cloth liquid component
Be 1000mm to 1800mm with nozzle spray height, spray angles are 90 ° to 150 °, ensure sprinkle density reach 200% with
On.
As shown in figure 4, will be seen that size droplet diameter distribution of the spray assemblies under different spray pressures in upper from figure, to
Ensure that spray atomizing cloth liquid effect is in optimum Working.General spray assemblies spray pressure need to control 2.0bar extremely
3.0bar, atomization droplets diameter ensure washing effect controllable mist entrainment simultaneously in 600um to 1200um.
Gas phase flow：
Dust-containing tail gas enters dust recycling and administration device by lateral access between being granulated, and makes pass sequentially through cycle from bottom to top
Liquid flow-guiding screen 1-1, column plate even gas distribution device 1-2, primary wash mill 1-3, two layers spray atomizing cloth liquid component 7-a, 7-b are high
The material dust carried in effect wash mill 1-4 washing separation ash-laden gas, carries high concentration material solution droplets secretly after washing
Gas enters composite efficient demister 1-5 and spray atomizing cloth liquid component 8-a, 8-b, and drop is intercepted by separation, clean
Gas is directly emptied via tower top air-introduced machine 4.Air-introduced machine provides power and overcomes system resistance.
Liquid phase flow：
Material moisturizing liquid is driven into high-efficient washing spray atomizing cloth liquid component 8-a or direct fluid infusion via fluid infusion pump and arrives
Liquid bath 6 is recycled, liquid passes through high-efficient washing device 1-4, primary wash mill 1-3, column plate gas successively from top to bottom by spraying
Then body uniform device 1-2 is collected by circulation fluid flow-guiding screen 1-1 and collects liquid bath 5, by downspout 5-1, liquid is collected
Into cycle liquid bath 6, after recycling liquid level arrival setting value in liquid bath 6, ON cycle liquid pump 7, liquid starts the cycle over, and system is just
Often operation.
Operation and control index：
1, circulation fluid operation temperature：25~40 DEG C；
2, circulating slot liquid level：60%~85%；
3, circulation fluid concentration：10%~20%；
4, using frequency conversion fan, load is adjusted according to temperature, produce load, and it is negative to be generally kept in 80% or 100%
It is run under lotus；
5, composite efficient demister is equipped with pressure difference alarm system, when pressure drop reaches early warning value, need to open online spray and wash
Wash device；
6, cycle liquid bath 6 is equipped with heating system, when 25~40 DEG C of circulation fluid temperature departure set temperature, automatically turn on or
Close heating device.
7, circulation fluid filtration device 10 is one to open one standby, need to periodically switch cleaning.
Claims (7)
1. a kind of mechanical ventilation type tower top treating flour dust retracting device, including device for recovering powder shell (1), shell (1) lower end
Air inlet (2) and upper end gas outlet (3)；It is characterized in that upper end gas outlet (3) upper end is equipped with the air inducing for force ventilation
Machine (4)；Shell (1) lower end, which is equipped with, collects liquid bath (5), cycle liquid bath (6), recycle liquid pump (7), fluid infusion pump (8), replenisher
Pipeline (9) and circulation fluid filtration device (10), the collection liquid bath (5) are connected with cycle liquid bath (6) by downspout (5-1)
It is logical；Shell (1) is provided, in sequence from bottom to top, with circulation fluid flow-guiding screen (1-1), column plate even gas distribution device (1-2), primary wash mill
(1-3), high-efficient washing device (1-4), composite efficient demister (1-5)；The cycle liquid bath (6) passes through recycle liquid pump
(7) respectively with circulation fluid first layer spray atomizing cloth liquid component (7-a), circulation fluid second layer spray atomizing cloth liquid component (7-b)
And circulation fluid drain pipe (7-c) mouth is connected；The supplement liquid pipeline (9) is sprayed with high-efficient washing respectively by fluid infusion pump (8)
Drench atomizing irrigation component (8-a), composite efficient demisting spray atomizing cloth liquid component (8-b) and circulating slot liquid supplementation pipe (8-c)
Mouth is connected, and can realize three's free switching according to live actual condition.
2. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that pushed up in air-introduced machine (4)
Portion is equipped with the protective cover (4-1) for preventing external impurities from entering the treating flour dust retracting device.
3. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that in shell (1) bottom
Being provided between collection liquid bath (5) prevents the circulation fluid flow-guiding screen (1-1) of circulation fluid splash.
4. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that in recycle liquid pump (7)
Front end increases circulation fluid filtration device (10), and filtering intercepts solid impurity in liquid, prevents solid impurity in liquid from blocking nozzle, makes
At the damage of pump.
5. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that as an improvement, following
Ring liquid pump (7) outlet is equipped with circulation fluid drain pipe (7-c).
6. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that in circulation fluid flow-guiding screen
It is equipped with column plate even gas distribution device (1-2) between (1-1) and primary wash mill (1-3), ensures that ash-laden gas is uniformly distributed, promotes follow-up work
Skill Effec-tive Function.
7. mechanical ventilation type tower top treating flour dust retracting device as described in claim 1, characterized in that in cycle liquid bath (6)
In be equipped with heating device for adjusting circulation fluid temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820052613.3U CN208003656U (en) | 2018-01-12 | 2018-01-12 | Mechanical ventilation type tower top treating flour dust retracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820052613.3U CN208003656U (en) | 2018-01-12 | 2018-01-12 | Mechanical ventilation type tower top treating flour dust retracting device |
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| Publication Number | Publication Date |
|---|---|
| CN208003656U true CN208003656U (en) | 2018-10-26 |
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ID=63881659
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820052613.3U Active CN208003656U (en) | 2018-01-12 | 2018-01-12 | Mechanical ventilation type tower top treating flour dust retracting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970716A (en) * | 2018-01-12 | 2018-05-01 | 西安同大科技有限公司 | Mechanical ventilation type tower top treating flour dust retracting device |
| CN114699872A (en) * | 2022-03-16 | 2022-07-05 | 桂林航天工业学院 | Method and device for determining optimal distance of nozzles in wet-type chord grid air purification device |
-
2018
- 2018-01-12 CN CN201820052613.3U patent/CN208003656U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970716A (en) * | 2018-01-12 | 2018-05-01 | 西安同大科技有限公司 | Mechanical ventilation type tower top treating flour dust retracting device |
| CN114699872A (en) * | 2022-03-16 | 2022-07-05 | 桂林航天工业学院 | Method and device for determining optimal distance of nozzles in wet-type chord grid air purification device |
| CN114699872B (en) * | 2022-03-16 | 2023-09-05 | 桂林航天工业学院 | Method and device for determining optimal distance of nozzles in wet type chord grid air purification device |
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