CN107983058A - High-tower granulation dust drainage atomization cleaning dust mist device - Google Patents

High-tower granulation dust drainage atomization cleaning dust mist device Download PDF

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Publication number
CN107983058A
CN107983058A CN201810053584.7A CN201810053584A CN107983058A CN 107983058 A CN107983058 A CN 107983058A CN 201810053584 A CN201810053584 A CN 201810053584A CN 107983058 A CN107983058 A CN 107983058A
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CN
China
Prior art keywords
dust
drainage
atomization
drainage atomization
cleaning
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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
Application number
CN201810053584.7A
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Chinese (zh)
Inventor
岳峰
王长立
郭锐
王晓英
赵桂周
冯文虎
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Xi'an Tongda Industrial Co Ltd
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Xi'an Tongda Industrial Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Xi'an Tongda Industrial Co Ltd filed Critical Xi'an Tongda Industrial Co Ltd
Priority to CN201810053584.7A priority Critical patent/CN107983058A/en
Publication of CN107983058A publication Critical patent/CN107983058A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/12Washers with plural different washing sections
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20Combinations of devices covered by groups B01D45/00 and B01D46/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

The invention discloses a kind of high-tower granulation dust to drain atomization cleaning dust mist device, circulator is collected including efficiently drainage atomization wash mill, high-effective dust-removing mist self-stripping unit and cleaning solution, wherein efficiently drainage atomization wash mill is provided with the positive drainage atomization washing unit of the positive drainage atomization washing unit of the first order and the second level from bottom to top, each washing unit is connected and composed by the spray tube that more longitudes and latitudes interlock, the multiple positive drainage atomization washing nozzles of every spray tube installation;High-effective dust-removing mist self-stripping unit is located on the positive drainage atomization washing unit in the second level, is provided with demister and on-line cleaning nozzle from bottom to top;Cleaning solution collects circulator and is arranged to catch tray, downspout, circulating slot, recycle liquid pump, supplement liquid pump, filter from top to bottom.The device can efficiently, low consumption, the recycling high-tower granulation dust of economy, make emission compliance.

Description

High-tower granulation dust drainage atomization cleaning dust mist device
Technical field
The invention belongs to environmental technology field, is related to a kind of for administering urea/ammonium nitrate high-tower granulation dust emission not Drainage atomization cleaning dust mist device up to standard.
Background technology
High-tower granulation and fluidized bed prilling are current granulating technique forms most important in the world, in China with high-tower granulation The production capacity accounting of technology type is up to 85%, and Chinese particulate matter limits discharge standard as 150mg/Nm3, and during high-tower granulation Tower top can waft and brim with a large amount of white dust-containing tail gas, and the actual discharge value of these dust is often as high as 200~500mg/Nm3, much Higher than existing limit value 150mg/Nm3, not only pollute atmospheric environment but also cause the severe attrition waste of finished product dust, at the same time These dust can drift the ground in several kilometers with tail gas, cause vegetation to wither, personnel health is damaged, with national environmental protection tune Control policy stringent and deeply, many enterprises limit the production or order halt production because of dust emission problem, so high-tower granulation dust Governing problem is very urgent.
The high-tower granulation treating flour dust recovery technology overwhelming majority is wet scrubbing dedusting technology at present, but since high tower is made Grain is mostly gravity-flow ventilation, and pressure head is smaller, and increased wet scrubbing dust-extraction unit is removed due to traditional sprinkler heads washing section and conventional filler The vapour lock of dirt section influences, and causing the tail gas of gravity-flow ventilation all can not smoothly discharge tower top, due to the factor of building the pressure, under product yield Drop 10%~15%, 10~15 degrees Celsius of product temperature rise, causes product hardened, influences product quality, price and brand prestige, obtains Mistake is not repaid;Filler dust-extraction unit traditional at the same time often sacrifices part dust removing effects, therefore in order not to excessive increase resistance Also have portion washes liquid and unwashed dust is entrained away, dust emission value is generally in 50~150mg/Nm after processing3.Closely Several years, in order to evade the above problem, there is a kind of forced ventilation wet scrubbing dust-extraction unit of more air-introduced machines of configuration in the country, Solves the problems, such as above-mentioned major part, but the investment of device is double and needs the operation electricity of extra reception 100~3,000,000 yuan every year Take and wind turbine maintenance cost, aggrandizement apparatus floor space while also increases high column overhead (50~100 meters) bearing load, has Some potential safety problems.Therefore this area just there is an urgent need to find a kind of high efficiency, low energy consumption, Low investment technology solve height Tower is granulated ash loss and discharges problem not up to standard.
The content of the invention
It is an object of the invention to problem existing in the prior art and hidden danger are solved, there is provided a kind of high-tower granulation powder Dirt drainage atomization cleaning dust mist device, the device can efficiently, low consumption, the recycling high-tower granulation dust of economy, make discharge It is up to standard.
Technical scheme is as follows:A kind of high-tower granulation dust drainage atomization cleaning dust mist device, it is characterized in that Circulator is collected including efficiently drainage atomization wash mill, high-effective dust-removing mist self-stripping unit and cleaning solution, wherein efficiently drawing Stream atomization wash mill is provided with the positive drainage atomization washing unit of the first order from bottom to top and the positive drainage atomization in the second level is washed Unit is washed, each washing unit is connected and composed by the spray tube that more longitudes and latitudes interlock, the multiple positive drainages of every spray tube installation It is atomized washing nozzle;High-effective dust-removing mist self-stripping unit is located on the positive drainage atomization washing unit in the second level, from bottom to top It is provided with demister and on-line cleaning nozzle;Cleaning solution collects circulator and is arranged to catch tray, downspout from top to bottom, follows Annular groove, recycle liquid pump, supplement liquid pump, filter.
As an improvement, the forward direction of the positive drainage atomization washing unit of the positive drainage atomization washing unit of the first order and the second level Drainage atomization washing nozzle is installed to be positive along touch, cross-flow distribution design.
As an improvement, positive drainage atomization washing nozzle realizes non-resistance atomization washing using unique cavity body structure, it is internal Constructed using S-shaped blade.
As an improvement, dust removal mist device is designed using new and effective S types buckle type.
As an improvement, the condensation between the positive drainage atomization washing unit in the increase second level and high-effective dust-removing mist self-stripping unit Settlement space and distance, condensation and Gravity Separation beneficial to cloud.
As an improvement, the on-line cleaning nozzle at the top of high-effective dust-removing mist self-stripping unit uses inverse touch wide-angle solid-cone Spiral nozzle.
As an improvement, export increase return line in recycle liquid pump.
As an improvement, increase overflow pipe and blow-off pipe.
As an improvement, increase filter in recycle liquid pump import.
The effect of the present invention
Analyzed from apparatus structure:
Forward direction drainage is atomized washing nozzle (11) and is sprayed using positive along touch installation, consistent with the direction of uprising gas, Air-flow resistance to mass tranfer caused by substantially reducing water-jet and atomization moisture film.The distribution of forward direction drainage atomization washing nozzle (11) is adopted It is distributed and is designed with cross-flow, is made full use of and absorb space and mass transfer maximal efficiency.Forward direction drainage atomization washing nozzle (11) is using only Special cavity body structure realizes non-resistance atomization washing, with reference to venturi principle and collides atomizing principles, makes full use of the energy of liquid, Liquid sucks ambient gas in injection, and the kinetic energy of liquid is passed to gas, so as to improve the flow velocity of gas, and is being spread Room gas-liquid forms " gas-in-liquid ", is finally sprayed by atomizer, produces smaller droplet, not only improves gas flow rate, but also can reach gas Liquid mixes, the effect of liquid atomization, while substantially reduces air-flow resistance to mass tranfer;Inside is constructed using S-shaped blade, can be conveyed and be contained There is the liquid of large-size particle without blocking, which allows the diameter of the solid particle passed through to be solid plain cone nozzle 10 times.
Dust removal mist device (3) uses new and effective S types buckle type demister, former using inertial collision and centrifugal cyclone Reason, ensures to realize high-effective dust-removing mist efficiency while air-flow rises resistance, significantly larger than traditional baffle plate filler dust-extraction unit, Its dust removal mist efficiency is atomized wash mill up to more than 90%, with reference to drainage, and dust emission value can be reduced to 30mg/ after processing Nm3Below.Condensation between the positive drainage atomization washing unit (1-2) in the increase second level and high-effective dust-removing mist self-stripping unit 17 is sunk Drop space and distance, condensation and Gravity Separation beneficial to cloud, the easy fouling and clogging of solution dust removal mist device and segregational load are asked Topic.The on-line cleaning nozzle (4) at the top of high-effective dust-removing mist self-stripping unit 17 uses inverse touch wide-angle solid-cone spiral nozzle, The nozzle has higher rate of release, can effectively clean new and effective S types buckle type demister (3).
From technological flow analysis:
Increase return line (12) is exported in recycle liquid pump (8), to prevent nozzle blocking from causing loine pressure excessive or follow Annular groove liquid level is too low, causes pump to dally.Increase overflow pipe (13) and blow-off pipe (14), by overflow pipe (13) and blow-off pipe (14) and The outer comb (15) of rich solution simultaneously leads to granulation tower bottom all the way, can so prevent from circulating tank liquid flow to too much between granulation and Rich solution can be drained into bottom of towe processing, save cost of investment and space.Increase filter (10) in pump inlet, so as to prevent Impurity enters nozzle, blocks nozzle.
From Performance Analysis:
From Economic and Efficiency Analysis:
By taking 19 meters of diameter, highly 85 meters of urea prilling tower as an example, gas flow 560000mg/Nm3, original granulation tower top Carbamide dust concentration discharge amount presses 300mg/Nm3Meter, is granulated tower top drainage atomization cleaning dust mist device carbamide dust concentration row It is high-volume 30mg/Nm3
By taking 19 meters of diameter, highly 85 meters of urea prilling tower as an example, gas flow 560000mg/Nm3, it is granulated tower top and passes System cleaning dust device carbamide dust concentration discharge amount presses 100mg/Nm3(average value) is counted, and is granulated tower top drainage atomization washing and is removed Cloud device carbamide dust concentration discharge amount is 30mg/Nm3
Drainage atomization cleaning dust mist device reduces 70mg/ compared with conventional washing dust-extraction unit carbamide dust concentration discharge amount Nm3, i.e., drainage is atomized cleaning dust mist device can recycle 52.7 ten thousand yuan/year (70mg/ more every year compared with conventional washing dust-extraction unit Nm3×56×104×24×330×10-9× 1700 yuan=52.7 ten thousand yuan/year)
Brief description of the drawings
Fig. 1 is the structure and flow diagram of the present invention.
Fig. 2 is the cross-sectional view of the present invention.
Fig. 3 is the cross-sectional view of high-effective dust-removing mist self-stripping unit 17.
Fig. 4 is the top view of efficient drainage atomization wash mill 16.
Drawing reference numeral:The positive drainage atomization washing unit 1-1 of the first order, the positive drainage atomization washing unit 1-2 in the second level, Spray tube 2, efficient S types buckle type demister 3, on-line cleaning nozzle 4, collecting tank 5, downspout 6, circulating slot 7, recycle liquid pump 8, supplement liquid pump 9, filter 10, forward direction drainage atomization washing nozzle 11, return line 12, overflow pipe 13, blow-off pipe 14, rich solution Outer comb 15, efficiently drainage atomization wash mill 16, high-effective dust-removing mist self-stripping unit 17, cleaning solution collect circulator 18.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the present invention.
With reference to Fig. 1, the present invention is a kind of high-tower granulation dust drainage atomization cleaning dust mist device, including efficiently drains mist Change wash mill 16, high-effective dust-removing mist self-stripping unit 17 and cleaning solution and collect circulator 18.
Gas phase flow:Lateral access enters first order drainage atomization and washes from bottom to top between granulation of the dust-containing tail gas through granulation tower Unit 1-1 is washed, is drained through forward direction and is atomized washing nozzle 11 and sprays, gas twitches mixing, washing and from spray inside nozzle with liquid Moisture film washing is twitched in head periphery with liquid, and the tail gas containing cloud after slightly washing enters second level drainage atomization washing unit from bottom to top 1-2, drains through forward direction and is atomized washing nozzle 11 and sprays, gas twitches mixing, washing and from nozzle periphery inside nozzle with liquid Moisture film washing is twitched with liquid, the tail gas cloud of washes clean is coalesced through gravity settling section by the gentle liquid phase condensate of gravity, point From high-effective dust-removing mist self-stripping unit 17 is entered after big cloud, dust removal mist self-stripping unit 17 uses new and effective S types buckle Formula demister 3, the purification gas after gas-liquid separation are discharged into air.
Liquid phase flow:Product hydrolysis waste liquid is delivered to by fluid infusion pump and is granulated interior circulating slot 7, and solution passes through in circulating slot The pressurization of recycle liquid pump 8 after filter 10 enters drainage atomization washing nozzle 11, and washing nozzle cross-flow is atomized with containing through two layers of drainage The contact of cloud gas enters collecting tank 5 after absorbing, and circulating slot 7 is back to through downspout 6 by collecting tank 5, when circulation fluid concentration reaches During to certain value (10~20%), discharged into outside circulation fluid into vapo(u)rization system, while product hydrolysis liquid supplements.As high-effective dust-removing mist fills Fouling is put, an other circulating pump 8 can be opened, is rinsed with the i.e. inverse touch wide-angle solid-cone spiral nozzle of online cleaning sprayer 4 Dust removal mist device.
When system just brings into operation, process water is first added to circulating slot liquid level half, the circulating pump after opening filter, is followed Ring liquid contacts absorption with gas after drainage atomization washing nozzle atomization, and in absorption process, product dissolving and heat absorbing, absorbs liquid temperature Degree declines, therefore circulating slot 7 uses low-pressure steam coil pipe constant temperature measures, ensures circulation fluid optimal absorption effect.
Increase return line 12 is exported in recycle liquid pump 8, to prevent nozzle blocks from causing loine pressure excessive or circulating slot Liquid level is too low, causes pump to dally.Increase overflow pipe 13 and blow-off pipe 14, by overflow pipe 13 and blow-off pipe 14 and comb 15 outside rich solution And granulation tower bottom is led to all the way, it can so prevent circulation tank liquid from flowing to too much between granulation and rich solution is drained into tower Bottom is managed, and saves cost of investment and space.Increase filter 10 in pump inlet, so as to prevent impurity from entering nozzle, block up Fill in nozzle.
The above, is only the preferable implementation of the present invention, not makees limitation in any form to the present invention, in every case It is the content without departing from technical solution of the present invention, what the technical spirit according to the present invention made above example any simply repaiies Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.

Claims (9)

1. high-tower granulation dust drainage atomization cleaning dust mist device, it is characterized in that including efficiently drainage atomization wash mill (16), high-effective dust-removing mist self-stripping unit (17) and cleaning solution collect circulator (18), wherein efficiently drainage atomization washing dress Put (16) and be provided with the positive drainage atomization washing list of the positive drainage atomization washing unit (1-1) of the first order and the second level from bottom to top First (1-2), each washing unit are connected and composed by the spray tube (2) that more longitudes and latitudes interlock, and every spray tube installs multiple forward directions Drainage atomization washing nozzle (11);High-effective dust-removing mist self-stripping unit (17) is located at the positive drainage atomization washing unit in the second level On (1-2), demister (3) and on-line cleaning nozzle (4) are provided with from bottom to top;Cleaning solution collects circulator (18) certainly Catch tray (5), downspout (6), circulating slot (7), recycle liquid pump (8), supplement liquid pump (9), filter (10) are arranged under above.
2. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, the first order is positive The positive drainage atomization washing nozzle of the positive drainage atomization washing unit (1-2) of drainage atomization washing unit (1-1) and the second level (11) installed to be positive along touch, cross-flow distribution.
3. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, forward direction drainage mist Change washing nozzle (11) and non-resistance atomization washing is realized using cavity body structure, inside is constructed using S-shaped blade.
4. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, demister (3) it is S type buckle types.
5. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, increase the second level Condensation settlement space and distance between forward direction drainage atomization washing unit (1-2) and high-effective dust-removing mist self-stripping unit (17).
6. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, high-effective dust-removing mist On-line cleaning nozzle (4) at the top of self-stripping unit (17) uses inverse touch wide-angle solid-cone spiral nozzle.
7. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, in recycle liquid pump (8) outlet increase return line (12).
8. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, in recycle liquid pump (8) outlet increase overflow pipe (13) and blow-off pipe (14), by overflow pipe (13) and blow-off pipe (14) with the outer comb (15) of rich solution simultaneously Granulation tower bottom is led to all the way.
9. high-tower granulation dust drainage atomization cleaning dust mist device as claimed in claim 1, it is characterized in that, in recycle liquid pump (8) import increase filter (10).
CN201810053584.7A 2018-01-19 2018-01-19 High-tower granulation dust drainage atomization cleaning dust mist device Pending CN107983058A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021089246A1 (en) * 2019-11-04 2021-05-14 Thyssenkrupp Industrial Solutions Ag Method and plant for producing urea granulate

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2257744Y (en) * 1996-01-10 1997-07-16 昆明化肥厂 Anti-blocking sprayer
CN200974818Y (en) * 2006-12-07 2007-11-14 张军保 Gas-liquid cocurrent flow type cooling washer for carbamide granulation exhaust gas
CN101104140A (en) * 2007-08-03 2008-01-16 褚雅安 Tower bubbling stuffing with vortex-flow and defrosting function
CN101116790A (en) * 2006-08-01 2008-02-06 永安智胜化工有限公司 Method for purifying flour dust for the urea granulation column
CN205672673U (en) * 2016-05-16 2016-11-09 北京香源溪环保科技有限公司 A kind of roof type S type dedusting demister
CN207886878U (en) * 2018-01-19 2018-09-21 西安同大实业股份有限公司 High-tower granulation dust drainage atomization cleaning dust mist device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2257744Y (en) * 1996-01-10 1997-07-16 昆明化肥厂 Anti-blocking sprayer
CN101116790A (en) * 2006-08-01 2008-02-06 永安智胜化工有限公司 Method for purifying flour dust for the urea granulation column
CN200974818Y (en) * 2006-12-07 2007-11-14 张军保 Gas-liquid cocurrent flow type cooling washer for carbamide granulation exhaust gas
CN101104140A (en) * 2007-08-03 2008-01-16 褚雅安 Tower bubbling stuffing with vortex-flow and defrosting function
CN205672673U (en) * 2016-05-16 2016-11-09 北京香源溪环保科技有限公司 A kind of roof type S type dedusting demister
CN207886878U (en) * 2018-01-19 2018-09-21 西安同大实业股份有限公司 High-tower granulation dust drainage atomization cleaning dust mist device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021089246A1 (en) * 2019-11-04 2021-05-14 Thyssenkrupp Industrial Solutions Ag Method and plant for producing urea granulate

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Application publication date: 20180504