CN102350162A - Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower - Google Patents
Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower Download PDFInfo
- Publication number
- CN102350162A CN102350162A CN2011102082233A CN201110208223A CN102350162A CN 102350162 A CN102350162 A CN 102350162A CN 2011102082233 A CN2011102082233 A CN 2011102082233A CN 201110208223 A CN201110208223 A CN 201110208223A CN 102350162 A CN102350162 A CN 102350162A
- Authority
- CN
- China
- Prior art keywords
- dust
- chamber
- tower
- filter
- reclaims
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a tower top dust recovery device for a urea granulation tower. The tower top dust recovery device comprises a granulation tower body and a receiving disc arranged in the tower body, wherein a cylindrical dust recovery chamber is arranged on the top of the tower body; the diameter of the dust recovery chamber is greater that of a tower top vent hole; sprinklers are arranged at upper and lower ends of the dust recovery chamber, and a filling dust suction device formed by an inclined partition plate is arranged between the sprinklers at two ends; a feed pipe connected to the bottom end of the receiving disc is connected with a filter; a discharge hole of the filter is connected with a circulating pump by a material control valve, and an outlet of the circulating pump is connected with the sprinklers at upper and lower ends in the dust recovery chamber by a pipeline; a branch pipe which opens into an evaporator is connected between the filter and the material control valve; and a water replenishing branch pipe is arranged between the material control valve and the circulating pump. Due to the adoption of a tail gas filter washing absorption device for the urea granulation tower, environment is protected; and more importantly, effective value is recovered, the waste of resources is reduced, and the investment in the device can be recovered quickly.
Description
Technical field
The present invention relates to a kind of device for recovering powder and method, a kind of specifically carbamide granulation column overhead device for recovering powder and recovery method.
Background technology
In the present most of production of chemical fertilizer enterprise; Usually all be entrained with very important carbamide dust and ammonia in the tail gas of urea prilling tower; Carbamide dust soluble in water, ammonia and condensation product not soluble in water are arranged; Particularly present; Most of producers expand the scale of production under the constant situation of original granulation tower.The producer that has is transformed into 200,000 tons of ∕ urea on the basis of 40,000 tons of ∕ urea, the nuisance quality such as dust of granulation tower discharging are along with the expansion of producing constantly increases, and tail gas contains dust concentration generally at 300-700 ㎎ ∕ Nm
3, environmental pollution is serious day by day; Generally speaking, producing 200000 tons of granulation towers per year can pollute the environment in the radius 6Km scope, forms the stronger atmospheric environment of corrosiveness.More existing production of chemical fertilizer enterprises are many employing watering dedustings in the cat head dedusting; But because dusty gas has higher temperature usually; Heat in the process of dedusting in the gas makes water evaporation; Can evaporate a large amount of urea liquids simultaneously; Cause efficiency of dust collection low; Energy utilization rate is not high, surrounding enviroment is produced pollute.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, and a kind of carbamide granulation column overhead device for recovering powder and recovery method are provided, and effectively improves the dust rate of recovery of granulation tower, and can reduce the pollution to environment.
In order to solve above technical problem, the present invention provides a kind of carbamide granulation column overhead device for recovering powder, comprises granulation tower tower body and the receiving plate that is arranged in the tower body; At said tower body top cylindrical dust is installed and reclaims the chamber; Said dust reclaims the chamber diameter greater than said cat head venthole diameter; Be provided with at the two ends up and down that said dust reclaims the chamber and spill the pouring device; Two ends are spilt to drench the filler dust exhaust apparatus of being made up of tilt clapboard are installed between the device; The tilt clapboard of said filler dust exhaust apparatus and the angle of horizontal plane are less than 90 °; The incline direction of said tilt clapboard is consistent, the flanging in the lower end of said tilt clapboard, and said flanging direction is vertical with horizontal plane; Said receiving plate bottom is connected to the material pipe and links to each other with filter, and the discharging opening of said filter connects circulating pump through the material controlling valve, through pipeline spilling of said circulating-pump outlet and the indoor two ends up and down of said dust recovery is drenched device again and links to each other; Be connected to arm and the concentration detection apparatus that leads to evaporimeter between said filter and the material controlling valve, be provided with the moisturizing arm between said material controlling valve and the said circulating pump.
At first, the present invention reasonably is provided with in the recovered overhead chamber and spills the pouring device up and down, and the lower end is spilt and drenched the water smoke that device sprays most particle in the dusty gas is absorbed, and gathers into heavy-fluid and drips the receiving plate that falls in the tower, forms " once absorbing "; Remaining fine dusts particle spills under the unrestrained water smoke effect of drenching device in the upper end, on the dust suction filler, fully absorbs once more, and the most dust in the gas are removed, and forms " secondary absorption "; This shows that the present invention is provided with cleverly and spills the pouring device up and down, absorb, make full use of the water smoke dust suction and reach the sufficient purpose of absorption thereby particle is formed secondary.
In addition, science of the present invention be provided with the filler device of forming by tilt clapboard spilling up and down to drench between the device, the tilt clapboard that is provided with is that air-flow rises passage is provided at interval, owing to being obliquely installed, more plays the effect of water conservancy diversion; In addition, the polylith tilt clapboard gives also that gas-liquid up and down is liquid-solid to provide sufficient mass-and heat-transfer area, increases time of contact, helps dust and absorbs; The flanging that is positioned at the dividing plate lower end more helps the rising of air-flow on the one hand; Strengthened the water conservancy diversion effect; Guide functions is provided for again on the other hand the drop that descends after the dust suction; Model under the drop after helping absorbing; Thereby play " bidirectional guide " effect; Reduce flow resistance, reduce the load carried of power-equipment.
Moreover; The present invention is provided with the arm that leads to vapo(u)rization system through the exit at filter; According to control material control valve, moisturizing manifold valve in the information of the concentration detection apparatus at mouth of pipe place and lead to vapo(u)rization system the arm valve unlatching or close; Can guarantee working well of whole system; And can timely the feed liquid that reclaims be recycled, reduce the secondary pollution that causes because of the evaporation of high concentration feed liquid.
The technical scheme that the present invention further limits is: aforesaid carbamide granulation column overhead device for recovering powder; Said tilt clapboard and horizontal plane angle are 30 °～60 °; The distance between plates of said tilt clapboard is 200mm～300 mm; The drop that helps forming can trickle to tower smoothly fast, improves the absorptivity of dust.
Aforesaid carbamide granulation column overhead device for recovering powder, said tilt clapboard is fixedly mounted on said dust through the horizontal bar plate and reclaims on the chamber interior walls, has guaranteed tilt clapboard under the impact of air-flow, and it is mobile not deform, and makes mass-and heat-transfer efficient higher.
Aforesaid carbamide granulation column overhead device for recovering powder, said dust reclaim the chamber to spill the opening direction that drenches device relative at two ends up and down, reclaim the indoor atomized drop that is full of at dust, can combine with carbamide dust fully.
Further, aforesaid carbamide granulation column overhead device for recovering powder, said spilling drenched device and is uniformly distributed with by some spraying nozzles and combines.
The recovery method of aforementioned urea granulation tower cat head device for recovering powder; Comprise the steps: that (1) dusty gas is after the cat head venthole gets into said dust recovery chamber; Reclaiming the droplet that spills the ejection of pouring device in the lower end, chamber with said dust combines; Form drop and drop down onto the receiving plate in the said granulation tower body, not upwards drift of the dust that combines with droplet; (2) the residue dusty gas reclaims the upper end, chamber with dust and spills and drench the droplet that device sprays and carry out mass-and heat-transfer on the said filler dust exhaust apparatus of being made up of tilt clapboard; The carbamide dust and the gas ammonia that absorb in the dusty gas form in the receiving plate in stream of liquid droplets to the granulation tower body, and on-condensible gas and inert gas reclaim top, chamber steam vent by said dust and discharge; (3) urea liquid in said receiving plate if urea concentration is higher than 18%, is then delivered to vapo(u)rization system by pipeline after pipeline flow to filter and filters, and closes or reduces the material controlling valve, opens the moisturizing arm simultaneously and supplies water to circulating pump; If the solution concentration after filter filters is not higher than 18%, then delivers to cat head and spill and drench device and absorb circulation by circulating pump.
The invention has the beneficial effects as follows: the present invention is rational in infrastructure, simple to operate; Being employed in granulation tower top setting height(from bottom) is the dust recovery chamber about 3 meters; And the hot air outlet diameter that the design dust reclaims the chamber is greater than former tower hot air outlet diameter; Making dust go out tower just slows down; Dust falls naturally; Alleviated the load of dust suction filler, made assimilation effect better; Dust-laden hot gas reclaims the chamber through dust, and the water smoke that spills pouring with top and the bottom on the dust suction filler carries out heat and mass, and carbamide dust and gas ammonia are absorbed fully, reaches the purpose of dedusting; No longer including a lot of atomized steam at the granulation tower top sheds; Even if the steam that distributes also only contains the urea liquid of very small amount; The present invention greatly reduces the pollution to environment to the form recycling of urea with solution, and effective organic efficiency of this nested structure can reach more than 80 ﹪.
Description of drawings
Fig. 1 is an embodiment of the invention schematic flow sheet.
Fig. 2 is a tilt clapboard filler dust exhaust apparatus structural representation of the present invention.
The specific embodiment
Embodiment 1
A kind of carbamide granulation column overhead device for recovering powder that present embodiment provides, structure comprise granulation tower tower body 1 and the receiving plate 2 that is arranged in the tower body as shown in Figure 1; At said tower body top cylindrical dust is installed and reclaims chamber 3, form the middle heat air chamber at cat head; Said dust reclaims the chamber diameter greater than said cat head venthole diameter, is provided with at the two ends up and down that said dust reclaims the chamber to be uniformly distributed with to combine to spill by some spraying nozzles to drench device 4, and the shower nozzle direction is oppositely arranged; Spill the filler dust exhaust apparatus 5 that installation is made up of tilt clapboard between the pouring device at two ends; The incline direction of said tilt clapboard is consistent; 6 flangings in the lower end of said tilt clapboard; Said flanging direction is vertical with horizontal plane; Tilt clapboard is fixedly mounted on said dust through horizontal bar plate 13 and reclaims on the inwall of chamber 3; Guaranteed tilt clapboard under the impact of air-flow, it is mobile not deform, and makes mass-and heat-transfer efficient higher; Said receiving plate 2 bottoms are connected to the material pipe and link to each other with filter 7, and the discharging opening of said filter connects circulating pump 9 through material controlling valve 8, through pipeline spilling of said circulating pump 9 outlets and the indoor two ends up and down of said dust recovery are drenched device 4 again and link to each other; Be connected to arm 10 and the concentration detection apparatus that leads to vapo(u)rization system between said filter 7 and the material controlling valve 8, be provided with moisturizing arm 11 between said material controlling valve 8 and the said circulating pump 9.
In the present embodiment,, designed the model of multiple tilt clapboard for this reason, as shown in Figure 2,, taken out one group of best model through contrast and field experiment because the design relation of dust suction filler the success or failure of a whole set of device for recovering powder:
| Sequence number | α | h | Result of use |
| First group | 90° | 200mm | The mass transfer dust removing effects is very poor, and gas is through smooth |
| Second group | 70° | 200mm | The mass transfer dust removing effects is general, and gas is through smooth |
| The 3rd group | 60° | 200mm | The mass transfer better dust removal effect, gas is through very smooth |
| The 4th group | 45° | 200mm | The mass transfer dust removing effects is fine, and gas is through also very smooth |
| The 5th group | 30° | 200mm | The mass transfer better dust removal effect, gas is through smooth |
Through contrasting the operating position of each group model in the table, selected 45 ° be the use angle of tilt clapboard, next sprays according to every kind of droplet again and the difference of the flowability of dusty gas mass-and heat-transfer confirms that it is 250mm that the distance between plates of tilt clapboard is selected h.
The present invention is workflow: urea granulation tower of dust and gas into the heat chamber 12, a large dust particles fall on the heat chamber at the bottom of urea acceptance disc 2, the rest continue to rise dusty heat diffusion into the dust collection chamber 3 (dust recovery chamber outlet section is about hot air chamber outlet section 2 times), when the exhaust gas flow rate will slow down twice, some dust falling in the dust collection chamber 3, the dust and gas continue to rise again into the composition by the inclined baffle filler suction device 5, steaming through the packing shed suction device 5 and the upper and lower water poured down the sprinkling of water leaching heat and mass transfer, thoroughly absorbed ammonia urea dust and gas, dissolved urea dust and ammonia water absorption forming an aqueous solution of low concentration and continue down the stream, and the dust collection chamber 3 in the deposition of dust exposure is dissolved in the inflow of hot gas chamber at the bottom of the receiving plate 2, and receiving tray large particles dissolve dust exposure, we get higher concentration Approximately 18-20% (by weight) of urea solution through the lower fluid flow through the filter pipeline flow of finished products of urea evaporation system; if a low concentration of the solution through the control valve 8, and the feed pipe into the prilling tower circulating pump 9, through pressurized through a pipe into sprinkle sprinkle drench shower unit up and down, and then absorb the inflow of dust and ammonia to form the bottom of the lower chamber heat recycling; water branch pipe 11 can contain a certain pressure at the pump inlet urea waste into a complementary amount of water to fill into the loss of moisture evaporation system, to ensure the normal operation of the system cycle.
Except that the foregoing description, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. a carbamide granulation column overhead device for recovering powder comprises granulation tower tower body and the receiving plate that is arranged in the tower body; It is characterized in that: cylindrical dust is installed at said tower body top reclaims the chamber; Said dust reclaims the chamber diameter greater than said cat head venthole diameter; Be provided with at the two ends up and down that said dust reclaims the chamber and spill the pouring device; Two ends are spilt to drench the filler dust exhaust apparatus of being made up of tilt clapboard are installed between the device; The tilt clapboard of said filler dust exhaust apparatus and the angle of horizontal plane are less than 90 °; The incline direction of said tilt clapboard is consistent; The flanging in the lower end of said tilt clapboard, said flanging direction is vertical with horizontal plane; Said receiving plate bottom is connected to the material pipe and links to each other with filter, and the discharging opening of said filter connects circulating pump through the material controlling valve, through pipeline spilling of said circulating-pump outlet and the indoor two ends up and down of said dust recovery is drenched device again and links to each other; Be connected to arm and the concentration detection apparatus that leads to evaporimeter between said filter and the material controlling valve, be provided with the moisturizing arm between said material controlling valve and the said circulating pump.
2. carbamide granulation column overhead device for recovering powder according to claim 1 is characterized in that: said tilt clapboard and horizontal plane angle are 30 °～60 °, and the distance between plates of said tilt clapboard is 200mm～300 mm.
3. carbamide granulation column overhead device for recovering powder according to claim 2 is characterized in that: said tilt clapboard is fixedly mounted on said dust through the horizontal bar plate and reclaims on the chamber interior walls.
4. carbamide granulation column overhead device for recovering powder according to claim 1 is characterized in that: said dust reclaims the chamber, and to spill the opening direction that drenches device relative at two ends up and down.
5. carbamide granulation column overhead device for recovering powder according to claim 4 is characterized in that: said spilling drenched device and is uniformly distributed with by some spraying nozzles and combines.
6. a carbamide granulation column overhead dust recovery method is characterized in that comprising the steps:
(1) dusty gas reclaims the droplet that spills the ejection of pouring device in the lower end, chamber with said dust and combines after the cat head venthole gets into said dust recovery chamber, forms drop and drops down onto the interior receiving plate of said granulation tower body, and the dust that combines with droplet upwards drifts about;
(2) the residue dusty gas reclaims the upper end, chamber with dust and spills and drench the droplet that device sprays and carry out mass-and heat-transfer on the filler dust exhaust apparatus of being made up of tilt clapboard; The carbamide dust and the gas ammonia that absorb in the dusty gas form in the receiving plate in stream of liquid droplets to the granulation tower body, and on-condensible gas and inert gas reclaim top, chamber steam vent by said dust and discharge;
(3) urea liquid in said receiving plate if urea concentration is higher than 18% (weight ratio), is then delivered to vapo(u)rization system by pipeline after pipeline flow to filter and filters, and closes or reduces the material controlling valve, opens the moisturizing arm simultaneously and supplies water to circulating pump; If the solution concentration after filter filters is not higher than 18% (weight ratio), then delivers to cat head and spill and drench device and absorb circulation by circulating pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102082233A CN102350162A (en) | 2011-07-22 | 2011-07-22 | Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102082233A CN102350162A (en) | 2011-07-22 | 2011-07-22 | Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102350162A true CN102350162A (en) | 2012-02-15 |
Family
ID=45573871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102082233A Pending CN102350162A (en) | 2011-07-22 | 2011-07-22 | Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102350162A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432847A (en) * | 2013-09-10 | 2013-12-11 | 安徽淮化股份有限公司 | Method and device for processing tail gas of ammonium nitrate prilling tower |
| CN110180275A (en) * | 2019-06-13 | 2019-08-30 | 福建龙净环保股份有限公司 | Dust pelletizing system for urea prilling tower |
| CN110617487A (en) * | 2019-09-30 | 2019-12-27 | 新中天环保股份有限公司 | Stacked domestic garbage incineration water washing tower |
| CN111085144A (en) * | 2019-12-31 | 2020-05-01 | 安徽六国化工股份有限公司 | Tail gas treatment device for urea prilling tower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239268A (en) * | 2008-03-21 | 2008-08-13 | 李洪林 | Method and device for recovering dust of urea granulation |
| CN201228981Y (en) * | 2008-02-21 | 2009-04-29 | 关云彪 | Tilted plate sedimentation and involution water bed desulfurizing dust remover for large-sized coal kiln |
| CN202169130U (en) * | 2011-07-22 | 2012-03-21 | 镇江市恒升达化工科技有限公司 | Tower top dust recovery device of urea prilling tower |
-
2011
- 2011-07-22 CN CN2011102082233A patent/CN102350162A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201228981Y (en) * | 2008-02-21 | 2009-04-29 | 关云彪 | Tilted plate sedimentation and involution water bed desulfurizing dust remover for large-sized coal kiln |
| CN101239268A (en) * | 2008-03-21 | 2008-08-13 | 李洪林 | Method and device for recovering dust of urea granulation |
| CN202169130U (en) * | 2011-07-22 | 2012-03-21 | 镇江市恒升达化工科技有限公司 | Tower top dust recovery device of urea prilling tower |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432847A (en) * | 2013-09-10 | 2013-12-11 | 安徽淮化股份有限公司 | Method and device for processing tail gas of ammonium nitrate prilling tower |
| CN103432847B (en) * | 2013-09-10 | 2016-08-03 | 安徽淮化股份有限公司 | A kind of method and device processing ammonium nitrate prill towers tail gas |
| CN110180275A (en) * | 2019-06-13 | 2019-08-30 | 福建龙净环保股份有限公司 | Dust pelletizing system for urea prilling tower |
| CN110617487A (en) * | 2019-09-30 | 2019-12-27 | 新中天环保股份有限公司 | Stacked domestic garbage incineration water washing tower |
| CN110617487B (en) * | 2019-09-30 | 2021-06-01 | 新中天环保股份有限公司 | Stacked domestic garbage incineration fly ash washing tower |
| CN111085144A (en) * | 2019-12-31 | 2020-05-01 | 安徽六国化工股份有限公司 | Tail gas treatment device for urea prilling tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201058267Y (en) | Device for cleaning and reclaiming urea dust | |
| CN107261710A (en) | The removal of dust in urea finishing | |
| CN102350162A (en) | Tower top dust recovery device for urea granulation tower and recovery method for dust on top of urea granulation tower | |
| CN203316002U (en) | Double-tower desulfurization system | |
| CN201505494U (en) | Dust remover for generating synthetic gas during the production of trichlorosilane | |
| CN101024603B (en) | Methanol absorbing system | |
| CN102423619A (en) | Composite seawater desulfurization apparatus | |
| CN101239268B (en) | Method and device for recovering dust of urea granulation | |
| CN204768168U (en) | Minimum discharge absorption tower | |
| CN202876620U (en) | Energy-saving urea prilling tower dust purification and recovery device | |
| CN106377968A (en) | Dust removing and recycling system for granulation column | |
| CN202169130U (en) | Tower top dust recovery device of urea prilling tower | |
| CN202506306U (en) | Novel ammonia process desulfurization absorption device | |
| CN102580504A (en) | Novel ammonia desulphurization absorption device | |
| CN200974818Y (en) | Gas-liquid cocurrent flow type cooling washer for carbamide granulation exhaust gas | |
| CN202844801U (en) | Urea dust recovery device | |
| CN201062240Y (en) | Formaldehyde absorption main tower | |
| CN201223761Y (en) | Powder dust-recovering device for prilling tower | |
| CN101352651A (en) | Integrated equipment for cooling, dedusting and desulfurizing | |
| CN101157012B (en) | Urea granulation temperature reduction dust collection method and apparatus | |
| CN100569725C (en) | Formaldehyde absorbing method and system | |
| CN105062574A (en) | Efficient combined dusty syngas washing dust removal device and method thereof | |
| CN204958841U (en) | Efficient combination formula dust -laden synthetic gas washing dust collector | |
| CN201217653Y (en) | Urea granulation flour dust recovering device | |
| CN103816753A (en) | Urea dust recycling and reutilizing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120215 |