CN206587499U - A kind of demister - Google Patents

A kind of demister Download PDF

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Publication number
CN206587499U
CN206587499U CN201720112108.9U CN201720112108U CN206587499U CN 206587499 U CN206587499 U CN 206587499U CN 201720112108 U CN201720112108 U CN 201720112108U CN 206587499 U CN206587499 U CN 206587499U
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China
Prior art keywords
riser
straight tube
demister
bar
divided
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CN201720112108.9U
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Chinese (zh)
Inventor
卜岩
侯娜
贾丽
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Sinopec Dalian Petrochemical Research Institute Co ltd
China Petroleum and Chemical Corp
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China Petroleum and Chemical Corp
Sinopec Dalian Research Institute of Petroleum and Petrochemicals
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Abstract

The utility model discloses a kind of demister, including several demisting components arranged side by side, each demisting component is including riser and straight tube, and straight tube, which is arranged on the outside of riser, the inner surface of straight tube, sets raised, and with riser on the same axis;Described riser be divided into vertically above and below two parts, top is divided into riser I, and bottom is divided into riser II, and riser I is connected with riser II by bearing, and riser II is fixed on tower tray;Riser I top sets capping plate, and some seams are provided with riser I circumference, has tangential flow guiding plate the riser I close to each bar seam is provided circumferentially about.Demister of the present utility model is simple in construction, and pressure drop is small, easy for installation, can effectively realize gas-liquid separation.

Description

A kind of demister
Technical field
The utility model is related to a kind of demister, the gas-liquid separation field belonged in Chemical Engineering, it is adaptable to chemical industry and ring Gas-liquid separation process in the fields such as guarantor.
Background technology
SO2It is the major reason that causes China's atmosphere pollution with dust, is also the atmosphere pollution of the current priority control of China Thing.At present, wet processing is used mostly in field of Environment Protection, in wet processing flue gas desulfurization course, absorption tower is in running In, " mist " that particle diameter is 10~60 microns is also easy to produce, not only contains moisture, also dissolved with sulfuric acid, sulfate, SO2Deng to big compression ring Border is polluted, while causing more serious corrosion to aiutage and heat exchanger etc..Therefore, in wet desulfurizing process, purification Gas has to demisting before absorption tower is left.
Demister is that the fields such as chemical industry or environmental protection are used for the processing equipment of gas-liquid separation.When the gas containing mist is with certain Speed by demister when, can and demister internal structure bump against, and depend in its surface.Demister internal structure surface On mist,, will be inside demister after weight reaches certain level by spreading and the effect of gravity can progressively be assembled Separated in structure.So as to realize gas-liquid separation.Demister is generally located at the top of absorption tower.When demister is in running It is middle because of fouling and caused by resistance drop when increasing to predetermined value, it is necessary to start backwashing procedures is rinsed to demister, typically, It is both needed to set flooding nozzle in demister inlet end and exhaust end.Serious entrainment of the gas phase to liquid phase may now be caused, caused Gas phase band liquid.
Many types, such as mesh mist eliminator, collapser demister, eddy flow can be divided into according to the purposes of demister, structure Plate demister, electrostatic precipitator, venetian blind type demister and gravitational settling type demister etc..Conventional has mesh mist eliminator, herringbone Plate demister, rotational flow plate defroster etc..Although mesh mist eliminator can separate general mist, mist cleaning, air-flow stream are required Speed is smaller, and resistance drop is big, and usage cycles are short, and equipment investment is big.Current demister typically all uses horizontally disposed, demister gas Body flow direction is vertical with silk screen, when gas velocity is relatively low, and the mist inertia of entrainment is small, is drifted in gas, it is impossible to collided with silk screen Contact and be removed, and because the drop that is separated is flowed to gas phase in adverse current, gas is also easy to produce reentrainment to drop, so that Make the reduction of gas-liquid separation efficiency, and also there is easily blocking, the problems such as pressure drop is big in mesh mist eliminator.Blade type, herringbone The deflection plate that direction is different, shape is different is installed, to form small runner, increase removes fog effect, knot inside demister Structure is more complicated, and separating effect is bad.The separated drop of rotational flow plate defroster is identical with gas flow, is also easy to produce reentrainment, drops Low demisting efficiency, and pressure drop is big, and energy consumption is higher.
The demister element that CN200410014713.X is introduced is made up of deflection plate and flue gas flow field adjustment block, and deflection plate is fixed In flue gas flow field adjustment block, the density and shape of deflection plate change according to the flow area change of flow field parameter everywhere, from And the flow area of air-flow in absorption tower is evenly distributed.Still do not break away from drop descent, gas-liquid counter current phenomenon, It is also easy to produce reentrainment.
The demister that CN200920128824.1 is introduced is made up of cooler, thick demister and smart demister etc., thick demisting Device is corrugated sheet or demisting plate, and smart demister is steel wire, and the demister changes traditional demister drop and airflow direction is inverse The shortcoming of flowing, improves demisting efficiency, but the demister structure is more complicated, makes difficult, and as a result of silk screen Structure, demister pressure drop is larger, is also easier to block.
The content of the invention
In view of the shortcomings of the prior art, the utility model provides a kind of demister, by fluid in flow process Multiple baffling realizes the separation of drop and gas.Demister of the present utility model is simple in construction, and pressure drop is small, easy for installation, can be with Effectively realize gas-liquid separation.
Demister of the present utility model, including several demisting components arranged side by side, each demisting component include riser And straight tube, straight tube, which is arranged on the outside of riser, the inner surface of straight tube, sets raised, and with riser on the same axis; Described riser be divided into vertically above and below two parts, top is divided into riser I, and bottom is divided into riser II, and riser I is with rising Tracheae II is connected by bearing, and riser II is fixed on tower tray;Riser I top sets capping plate, in riser I circle Some of Zhou Kaiyou seams, have tangential flow guiding plate the riser I stitched close to each bar is provided circumferentially about.
In demister of the present utility model, the upper edge of described straight tube is higher than riser I upper edge, and the lower edge of straight tube away from With a certain distance from tower tray.
In demister of the present utility model, the diameter parallel of projection and straight tube on the inner surface of described straight tube, or It can be formed an angle with axis.The raised section of the setting can be the suitable shapes such as rectangle, triangle or circle.This Projection described in utility model is preferred to use the clapper structure of rectangular cross-section.Wherein, the direction of rotation of hyoplastron is with tangentially leading The direction of rotation for flowing plate is opposite.
In demister of the present utility model, riser I is rotated by connecting bearing under external force.
The gas of entrained drip enters riser II from tower tray lower space, and gas phase is in uphill process, Vapor Entrainment liquid Mutually rise, meet gas phase flow direction after capping plate and change(Level or level of approximation direction are changed to by ascent direction), and it is small Drop is collided due to effect of inertia with capping plate, and is attached on capping plate, and the drop of attachment is become larger, and drop is arrived greatly Its own gravity produced exceedes climbing power and when the making a concerted effort of surface tension of liquid of gas, and drop is just from quilt in capping plate surface Separate, complete a gas-liquid separation.The line of rabbet joint outflow that separated gas-liquid two-phase is not opened up from riser I tops, Under the guide functions of tangential flow guiding plate, gas phase is set to change again, not removed droplet is turned in tangential flow guiding plate Place acts on and is captured by identical, another gas-liquid separation is completed, while impetus of the tangential flow guiding plate in gas Under, drive riser I to be rotated by connecting bearing, riser I rotation direction is oppositely oriented with tangential flow guiding plate, makes Straight tube inwall is continuously hit from the gas after the outflow of tangential flow guiding plate everywhere, without being merely to hit straight tube inwall fixed position, Shaving effect is strengthened, is uniformly distributed while being more favorable to gas in outer barrel.Simultaneously as straight tube inwall is provided with tongue Plate, when running into the hyoplastron on straight tube inwall, due to occurring airbond, gas flow direction is changed again, and droplet is attached to Turning on the inwall hyoplastron of straight tube, drop aggregation becomes big, is flowed down along the crack of hyoplastron and barrel, accelerates coalescence, reduces Entrainment.Drop is when flowing downward, under the blowing of gas, and drop hurtles down, and realizes gas-liquid separation.
Brief description of the drawings
Fig. 1 is demister structural representation of the present utility model.
Fig. 2 is the schematic cross-section of riser I tangential flow guidings plate and straight tube hyoplastron in the utility model demister.
In figure each mark for:1- tower trays;2- riseies II;3- bearings;4- riseies I;5- bars are stitched;6- tangential flow guiding plates; 7- covers plate;8- is raised;9- straight tubes.
Embodiment
Demister of the present utility model is described in further detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, demister of the present utility model includes riser I4, riser II2 and straight tube 9, riser I4 is connected with riser II2 by bearing 3, and straight tube 9 is arranged on riser I4 and riser II2 outside, and with riser I4, II2 is on the same axis;Riser II2 is fixed on tower tray 1;Riser I top sets capping plate 7, in riser I circle Some of Zhou Kaiyou seams 5, the riser I that 5 are stitched close to each bar it is provided circumferentially about have set on tangential flow guiding plate 6, the inwall of straight tube 9 Put projection 8.
The size of bar seam 5 is opened up on riser tube wall, can be needed according to actual operating mode or design requirement, by this area Technical staff is determined.The height of bar seam 5 can be 20~500mm, preferably 200~350mm as described;The width of bar seam 5 Can be 20~120mm, preferably 50~80mm.The area that always cracks of described bar seam, typically can be the 3 of riser sectional area ~5 times.5 connected positions, which are stitched, with bar is provided with tangential flow guiding plate 6, and the direction of rotation of tangential flow guiding plate 6 is consistent, tangential flow guiding plate 6 Mainly play drainage and baffling.The angle [alpha] that tangential flow guiding plate 6 is tilted is generally 5 °~45 °, preferably 15 °~30 °.Riser Top is provided with capping plate, with riser tube wall airtight connection.
In demister of the present utility model, wherein the upper end of straight tube 9 is higher than capping plate 7, and the lower edge of straight tube 9 is apart from tower tray 1 certain distance.The lower edge of straight tube should stitch 5 lower edge less than bar.Straight tube lower edge can away from the vertical range that riser bar stitches 5 lower edges Think 20~260mm, preferably 50~80mm.Straight tube diameter can be 1.1 times~1.6 times of draft tube diameter, preferably 1.1 times~ 1.2 again.The height of straight tube can be 1.3 times~2 times that riser bar stitches height.Height of the straight tube lower edge away from tower tray 1 can be 5 ~100mm, preferably 20~50mm.
In demister of the present utility model, the inner surface of straight tube 9(Inwall)It is upper that projection 8, the axle of projection 8 and straight tube 9 are set Line is parallel, or can be formed an angle with axis, and angle can be 10 °~45 °, preferably 15 °~25 ° as described.Projection 8 Section can be preferably rectangular, i.e., raised preferably hyoplastron in rectangle, triangle or circular arc, the utility model.Such as in Fig. 2 In, projection 8 is hyoplastron.Projection 8 is typically uniformly distributed on the inner surface of straight tube, and its quantity is that riser bar stitches the 1.5 of quantity ~3 times.Some raised 8 direction of rotation are consistent, it is identical with the direction of rotation of tangential flow guiding plate 6 or rather, it is preferred to it is tangential The direction of rotation of deflector is opposite.
Embodiment
Certain wet scrubber tower purifying smoke 180000Nm3/ h, wherein aobvious water concentration is 10~15g/Nm3, through the utility model Show water concentration in demisting final vacuum and be less than 0.5g/Nm3, demisting efficiency is more than 93%.

Claims (9)

1. a kind of demister, including several demisting components arranged side by side, it is characterised in that:Each demisting component includes riser And straight tube, straight tube, which is arranged on the outside of riser, the inner surface of straight tube, sets raised, and with riser on the same axis; Described riser be divided into vertically above and below two parts, top is divided into riser I, and bottom is divided into riser II, and riser I is with rising Tracheae II is connected by bearing, and riser II is fixed on tower tray;Riser I top sets capping plate, in riser I circle Some of Zhou Kaiyou seams, have tangential flow guiding plate the riser I stitched close to each bar is provided circumferentially about.
2. according to the demister described in claim 1, it is characterised in that:The upper edge of described straight tube is higher than riser I upper edge, And the lower edge of straight tube is apart from tower tray certain distance.
3. according to the demister described in claim 1, it is characterised in that:Projection and straight tube on the inner surface of described straight tube Diameter parallel, or formed an angle with axis.
4. according to the demister described in claim 1, it is characterised in that:The described raised hyoplastron knot using rectangular cross-section Structure, the direction of rotation of hyoplastron is opposite with the direction of rotation of tangential flow guiding plate.
5. according to the demister described in claim 1, it is characterised in that:Riser I is sent out by connecting bearing under external force It is raw to rotate.
6. according to the demister described in claim 1, it is characterised in that:The height h that bar seam is opened up on riser I circumference is 20 ~500mm, the width of bar seam 5 is 20~120mm, and the area that always cracks of bar seam is 3~5 times of riser sectional area.
7. according to the demister described in claim 1, it is characterised in that:The angle [alpha] that tangential flow guiding plate is tilted is 5 °~45 °.
8. according to the demister described in claim 1, it is characterised in that:1.1 times~the 1.6 of a diameter of draft tube diameter of straight tube Times, the height of straight tube stitches 1.3 times~2 times of height for bar.
9. according to the demister described in claim 1, it is characterised in that:Projection on the circumference of straight tube is on the inner surface of straight tube It is uniformly distributed, its quantity is 1.5~3 times that riser bar stitches quantity.
CN201720112108.9U 2017-02-07 2017-02-07 A kind of demister Active CN206587499U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110314454A (en) * 2018-03-28 2019-10-11 鼎朋企业股份有限公司 With the dust collecting of multiple cyclonic dust filtering
CN111811237A (en) * 2020-07-24 2020-10-23 蚌埠学院 Natural wind simulation device for meat air drying
CN113790619A (en) * 2021-09-26 2021-12-14 约克(无锡)空调冷冻设备有限公司 Falling film evaporator
CN115003403A (en) * 2020-08-24 2022-09-02 富士电机株式会社 Exhaust gas purification device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110314454A (en) * 2018-03-28 2019-10-11 鼎朋企业股份有限公司 With the dust collecting of multiple cyclonic dust filtering
CN110314454B (en) * 2018-03-28 2022-03-01 鼎朋企业股份有限公司 Dust collecting device for filtering dust by multiple cyclones
CN111811237A (en) * 2020-07-24 2020-10-23 蚌埠学院 Natural wind simulation device for meat air drying
CN115003403A (en) * 2020-08-24 2022-09-02 富士电机株式会社 Exhaust gas purification device
CN113790619A (en) * 2021-09-26 2021-12-14 约克(无锡)空调冷冻设备有限公司 Falling film evaporator
CN113790619B (en) * 2021-09-26 2023-11-07 约克(无锡)空调冷冻设备有限公司 Falling film evaporator

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Effective date of registration: 20240328

Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen

Patentee after: CHINA PETROLEUM & CHEMICAL Corp.

Country or region after: China

Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd.

Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen

Patentee before: CHINA PETROLEUM & CHEMICAL Corp.

Country or region before: China

Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp.

TR01 Transfer of patent right