CN207520833U - A kind of ammonia-contaminated gas absorption system - Google Patents
A kind of ammonia-contaminated gas absorption system Download PDFInfo
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- CN207520833U CN207520833U CN201721590554.7U CN201721590554U CN207520833U CN 207520833 U CN207520833 U CN 207520833U CN 201721590554 U CN201721590554 U CN 201721590554U CN 207520833 U CN207520833 U CN 207520833U
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Abstract
A kind of ammonia-contaminated gas absorption system of the utility model is made of the first absorption tower, heat exchanger, the first centrifugal pump, the second centrifugal pump, venturi mixer, second absorption tower and third absorption tower.First absorption tower, heat exchanger and the first centrifugal pump constitute cycle and cooling system substantially increases the concentration of ammonium hydroxide after absorbing；Second absorption tower is provided with water and the gas feed of more side lines, help to improve absorption efficiency and operating flexibility, the especially valve plate setting of second absorption tower, ensure that out the tail gas of second absorption tower and being in direct contact for soft water, is conducive to control out the reduction of ammonia content and stabilization in the tower tail gas；Third absorption tower, as filler, the ability for providing buffering can be absorbed for ammonia, is conducive to the raising of device operating flexibility using cation exchange resin.
Description
Technical field
The invention belongs to exhaust gas treatment technology more particularly to a kind of ammonia-contaminated gas absorption systems.
Background technology
Ammonia is one of typical poisonous and harmful industrial gaseous pollutant, and a large amount of ammonia-contaminated gas are directly discharged into air, not only make
Into the loss of synthesis ammonolysis product, and it is degrading the living environment of people.Ammonia-contaminated gas source includes discharging for Ammonia Production
Gas, coke-stove gas, the exhaust of ammonia refrigerated cylinder, nitric acid plant tail gas and is carried out at the high altitude discharge tail gas of urea prilling tower using ammonia
Synthesize the production process of organic amine.Therefore, ammonia-contaminated gas purified treatment and recycling have important environmental protection and economic value.At present
It is to absorb two kinds of recycling and catalyzed conversion for ammonia-contaminated gas treatment technology master（A kind of ammonia absorption device, the patent No.
201110105217.5；Li Liang sprouts, in the purification of Zheng Shu flat typical flue gas containing ammonia and engineering mimoir device operation summary [J]
Nitrogenous fertilizer, 2014 (4):1-4.）, wherein catalyzed conversion is mainly used for absorbing the harmless treatment of exhaust gas after recycling, therefore main body
Technology is still to absorb recycling.
Main problem existing for the absorption recovery system of ammonia-contaminated gas is that the concentration of ammonia is usually big in the tail gas after water absorption
In 15 ppm, need to be absorbed using acid solution could discharge, and in tail gas ammonia concentration it is fast as exhausted air quantity and ammonia density increase
Speed increase, acid solution consumption also increase rapidly.Therefore the absorption efficiency of ammonia-contaminated gas absorption system and operating flexibility tool are improved
It is significant.
Invention content
To solve insufficient and defect existing for conventional method, the present invention using special construction absorption tower and is filled with sun simultaneously
Improve absorption efficiency and operating flexibility in the absorption tower of ion exchange resin.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of ammonia-contaminated gas absorption system, feature
It is：The system comprises：First absorption tower（1）, heat exchanger（2）, the first centrifugal pump（3）, the second centrifugal pump（4）, venturi
Mixer（5）, second absorption tower（6）And third absorption tower（7）；First absorption tower（1）Inside it is equipped with successively from top to bottom
First demister（12）With the first filler（11）, first absorption tower（1）Top be equipped with the first gas outlet（13）, bottom sets
There is the first water outlet（15）, side be less than the first filler（11）Position be equipped with the first air inlet（14）, side is removed positioned at first
Day with fog（12）With the first filler（11）Between position be equipped with the first water inlet（16）；The heat exchanger（2）Equipped with import and go out
Mouthful；First centrifugal pump（3）With the second centrifugal pump（4）It is respectively equipped with respective inlet and outlet；The venturi mixer
（5）It is equipped with the second water inlet（51）, the second air inlet（52）, liquid-vapor mixture outlet（53）；The second absorption tower（6）It is interior
It is equipped with the second demister successively from top to bottom（61）, valve plate（62）, the second filler（63）And third filler（64）；It is described
Second absorption tower（6）Top be equipped with the second gas outlet（65）, bottom be equipped with the second water outlet（610）, side is in the second demisting
Device（61）And valve plate（62）Between position be equipped with third water inlet（66）, side is in valve plate（62）With the second filler
（63）Between position be equipped with the 4th water inlet（67）, side is in the second filler（63）With third filler（64）Between position set
There is liquid-vapor mixture import（68）, side is in third filler（64）Lower part is equipped with third air inlet（69）；The third absorption tower
（7）Inside it is equipped with the 4th filler（73）, top is equipped with third gas outlet（71）, bottom be equipped with brine outlet（75）, side is higher than the
Four fillers（73）Position be equipped with acid solution import（72）, side be less than the 4th filler（73）Position be equipped with the 4th air inlet
（74）；Ammonia-contaminated gas is from first absorption tower（1）The first air inlet（14）Into first absorption tower（1）First
Water outlet（15）With the first centrifugal pump（3）Import be connected, first centrifugal pump（3）Outlet and heat exchanger（2）Into
Mouth is connected, the heat exchanger（2）Outlet pass through the second threeway（102）After be divided into two-way, all the way be ammonium hydroxide outlet, another way
Pass through the first threeway（101）After be divided into two-way, all the way with the first absorption tower（1）The first water inlet（16）It is connected, it is another
Road and second centrifugal pump（4）Outlet be connected, the second centrifugal pump（4）Import and second absorption tower（6）Second go out
The mouth of a river（610）It is connected；First absorption tower（1）The first gas outlet（13）Pass through third threeway（103）After be divided into two-way,
All the way with the venturi mixer（5）The second air inlet（52）It is connected, another way and the second absorption tower（6）
Three air inlets（69）It is connected；Soft water passes through the 4th threeway（104）After be divided into two-way, all the way with second absorption tower（6）Third
Water inlet（66）It is connected, another way passes through the 5th threeway（105）After be divided into two-way, all the way with second absorption tower（6）The 4th
Water inlet（67）It is connected, another way and venturi mixer（5）The second water inlet（51）It is connected；The venturi mixing
Device（5）Liquid-vapor mixture outlet（53）With second absorption tower（6）Liquid-vapor mixture import（68）It is connected；Described second inhales
Receive tower（6）The second gas outlet（65）With third absorption tower（7）The 4th air inlet（74）It is connected.
As an improvement, the second absorption tower（6）Valve plate（62）Percent opening for 12 ~ 20%, the valve plate
（62）Float valve be F-1 type float valves.
As an improvement, the second absorption tower（6）The second filler（63）To dissipate the stainless steel Pall ring of heap, the Bauer
The size of ring is 25 mm of diameter, high 25 mm, 1.6 mm of wall thickness.
It is further improved, the second absorption tower（6）Third filler（64）To dissipate the stainless steel Pall ring of heap, the Bao
The size of your ring is 16 mm of diameter, high 16 mm, 1.0 mm of wall thickness.
It improves again, the third absorption tower（7）The 4th filler（73）For ion exchange resin, the ion exchange resin
For large hole strong acid styrene system cation exchange resin, model D001.
Compared with prior art, the advantage of the invention is that：1st, the first absorption tower, heat exchanger and the first centrifugal pump are formed
Cycle and cooling system substantially increase absorb after ammonium hydroxide concentration；2nd, second absorption tower is provided with the water and gas of more side lines
Import helps to improve the valve plate setting of absorption efficiency and operating flexibility, especially second absorption tower, ensure that out second
The tail gas on absorption tower and being in direct contact for soft water are conducive to control out the reduction of ammonia content and stabilization in the tower tail gas；3rd, third
Absorption tower, as filler, the ability for providing buffering can be absorbed for ammonia, is conducive to device operating flexibility using cation exchange resin
Raising.
Description of the drawings
Fig. 1 is a kind of schematic diagram of ammonia-contaminated gas absorption system of the present invention.
Wherein：1 is the first absorption tower, and 2 be heat exchanger, and 3 be the first centrifugal pump, and 4 be the second centrifugal pump, and 5 mix for venturi
Clutch, 6 be second absorption tower, and 7 be third absorption tower, and 11 be the first filler, and 12 be the first demister, and 13 be the first gas outlet,
14 be the first air inlet, 15 be the first water outlet, 16 be the first water inlet, 51 be the second water inlet, 52 be the second air inlet, 53
It is exported for liquid-vapor mixture, 61 be the second demister, and 62 be valve plate, and 63 be the second filler, and 64 be third filler, and 65 be the
Two gas outlets, 66 be third water inlet, 67 be the 4th water inlet, 68 be liquid-vapor mixture import, 69 be third air inlet, 610
It is third gas outlet for the second water outlet, 71,72 be acid solution import, and 73 be the 4th filler, and 74 be the 4th air inlet, and 75 be salt
Water out, 101 be the first threeway, and 102 be the second threeway, and 103 be third threeway, and 104 be the 4th threeway, and 105 be the 5th threeway.
Specific embodiment
Below in conjunction with the accompanying drawings 1, the present invention is described in further detail by embodiment.
Embodiment 1
A kind of ammonia-contaminated gas absorption system, including：First absorption tower（1）, heat exchanger（2）, the first centrifugal pump（3）, second
Centrifugal pump（4）, venturi mixer（5）, second absorption tower（6）And third absorption tower（7）；First absorption tower（1）It is interior from upper
It is equipped with the first demister successively down（12）With the first filler（11）, the first absorption tower（1）Top be equipped with the first gas outlet
（13）, bottom be equipped with the first water outlet（15）, side be less than the first filler（11）Position be equipped with the first air inlet（14）, side
Positioned at the first demister（12）With the first filler（11）Between position be equipped with the first water inlet（16）；Heat exchanger（2）Equipped with into
Mouth and outlet；First centrifugal pump（3）With the second centrifugal pump（4）It is respectively equipped with respective inlet and outlet；Venturi mixer（5）
It is equipped with the second water inlet（51）, the second air inlet（52）, liquid-vapor mixture outlet（53）；Second absorption tower（6）It is interior from upper past
Under successively be equipped with the second demister（61）, valve plate（62）, the second filler（63）And third filler（64）；Second absorption tower
（6）Top be equipped with the second gas outlet（65）, bottom be equipped with the second water outlet（610）, side is in the second demister（61）With it is floating
Valve tower plate（62）Between position be equipped with third water inlet（66）, side is in valve plate（62）With the second filler（63）Between
Position is equipped with the 4th water inlet（67）, side is in the second filler（63）With third filler（64）Between position equipped with vapour-liquid mix
Object import（68）, side is in third filler（64）Lower part is equipped with third air inlet（69）；Third absorption tower（7）The 4th is inside equipped with to fill out
Material（73）, top is equipped with third gas outlet（71）, bottom be equipped with brine outlet（75）, side be higher than the 4th filler（73）Position
Equipped with acid solution import（72）, side be less than the 4th filler（73）Position be equipped with the 4th air inlet（74）；Ammonia-contaminated gas is from institute
State the first absorption tower（1）The first air inlet（14）Into the first absorption tower（1）The first water outlet（15）With the first centrifugal pump
（3）Import be connected, the first centrifugal pump（3）Outlet and heat exchanger（2）Import be connected, heat exchanger（2）Outlet lead to
Cross the second threeway（102）After be divided into two-way, be ammonium hydroxide outlet all the way, another way passes through the first threeway（101）After be divided into two-way,
All the way with the first absorption tower（1）The first water inlet（16）It is connected, another way and second centrifugal pump（4）Outlet be connected
It is logical, the second centrifugal pump（4）Import and second absorption tower（6）The second water outlet（610）It is connected；First absorption tower（1）'s
First gas outlet（13）Pass through third threeway（103）After be divided into two-way, all the way with the venturi mixer（5）The second air inlet
Mouthful（52）It is connected, another way and the second absorption tower（6）Third air inlet（69）It is connected；Soft water passes through the 4th threeway
（104）After be divided into two-way, all the way with second absorption tower（6）Third water inlet（66）It is connected, another way passes through the 5th threeway
（105）After be divided into two-way, all the way with second absorption tower（6）The 4th water inlet（67）It is connected, another way is mixed with venturi
Device（5）The second water inlet（51）It is connected；Venturi mixer（5）Liquid-vapor mixture outlet（53）With second absorption tower
（6）Liquid-vapor mixture import（68）It is connected；Second absorption tower（6）The second gas outlet（65）With third absorption tower（7）'s
4th air inlet（74）It is connected.
Second absorption tower（6）Valve plate（62）Percent opening for 12%, the valve plate（62）Float valve be F-1
Type float valve.
Second absorption tower（6）The second filler（63）To dissipate the stainless steel Pall ring of heap, the size of Pall ring is diameter 25
Mm, high 25 mm, 1.6 mm of wall thickness.
Second absorption tower（6）Third filler（64）To dissipate the stainless steel Pall ring of heap, the size of Pall ring is diameter 16
Mm, high 16 mm, 1.0 mm of wall thickness.
Third absorption tower（7）The 4th filler（73）For ion exchange resin, ion exchange resin is macropore strong acid benzene
Ethylene cation exchanger resin, model D001.
The course of work of the system of the present invention is as follows：Ammonia-contaminated gas is from the first absorption tower（1）To enter bottom of towe backward for bottom
On across the first filler（11）, by the first threeway（101）And the composite absorber come is from the first water inlet（16）Into in tower, after
It is passed down through the first filler（11）, such composite absorber and ammonia-contaminated gas are in the first filler（11）Middle progress vapour-liquid contact and biography
Matter, tower reactor obtain ammonium hydroxide, and tower top obtains preliminary purification gas；The ammonium hydroxide of first absorption tower tower reactor passes through the first centrifugal pump（3）With change
Hot device（2）After be divided into two-way, discharge system goes ammonia recovery system, another the first threeway of entrance all the way（101）With by second from
Heart pump（4）From second absorption tower（6）The tower bottoms of tower reactor conveying is mixed to form composite absorber；In this way by the first absorption tower
（1）, the first centrifugal pump（3）And heat exchanger（2）Composition system realizes part cycle and the cooling of absorbent, so as to improve discharge ammonia
The concentration of water.
Preliminary purification gas is from the first absorption tower（1）The first gas outlet（13）Discharge, by third threeway（103）After be divided into
Two-way, all the way into venturi mixer（5）, another way enters second absorption tower（6）Bottom；Soft water from public work
Pass through the 4th threeway（104）After be divided into two-way, pass through third water inlet all the way（66）Into in tower, another way passes through the 5th threeway
（105）After be divided into two-way, all the way into tower, another way enters venturi mixer（5）And pass through text with preliminary purification gas
The immixture of venturi carries out vapour-liquid and is mixed to get gaseous mixture, and gaseous mixture is from liquid-vapor mixture import（68）Into in tower.This
Sample is in second absorption tower（6）It is interior compared to the second filler（63）, third filler（64）Filler size setting it is smaller, by third
Filler（64）Tolerance it is smaller and liquid measure is larger, mass-transfer efficiency can be greatly improved；Compared to valve plate（62）, by second
Filler（63）Tolerance it is smaller and liquid measure is larger, valve plate can improve operating flexibility by float valve effect, due to column plate point
Grade contact, it is ensured that channel is less likely to occur gas, so that it is guaranteed that the low concentration of exhaust gas body ammonia；Second absorption tower at this time
（6）Tower top obtains purified gas again, and tower reactor obtains tower bottoms.
Purified gas is from second absorption tower again（6）The second gas outlet（65）Enter third absorption tower after discharge（7）Tower
Kettle, after be upward through the 4th filler（73）, chemical absorbing is carried out with the sulfuric acid solution from tower top, due to the 4th filler（73）It adopts
The acidity of absorbent can be improved with large hole strong acid styrene system cation exchange resin, while acid is provided for absorption process
The buffering of degree is conducive to cope with the situation of ammonia-contaminated gas flow and fluctuation of concentration so as to improve operating flexibility；Third absorption tower
（7）For the concentration of ammonia less than 1 ppm, tower reactor obtains ammonium sulfate, can be on third absorption tower in tower top discharge purified gas（7）Inside follow
Ring or outer row processing.
Embodiment 2
Except second absorption tower（6）Valve plate（62）Percent opening for except 15%, remaining content is same as Example 1.
Embodiment 3
Except second absorption tower（6）Valve plate（62）Percent opening for except 18%, remaining content is same as Example 1.
Embodiment 4
Except second absorption tower（6）Valve plate（62）Percent opening for except 20%, remaining content is same as Example 1.
Claims (5)
1. a kind of ammonia-contaminated gas absorption system, it is characterised in that：Institute's system includes the first absorption tower（1）, heat exchanger（2）, first
Centrifugal pump（3）, the second centrifugal pump（4）, venturi mixer（5）, second absorption tower（6）And third absorption tower（7）；
First absorption tower（1）Inside it is equipped with the first demister successively from top to bottom（12）With the first filler（11）, described first
Absorption tower（1）Top be equipped with the first gas outlet（13）, bottom be equipped with the first water outlet（15）, side be less than the first filler（11）
Position be equipped with the first air inlet（14）, side is located at the first demister（12）With the first filler（11）Between position be equipped with the
One water inlet（16）；The heat exchanger（2）Equipped with inlet and outlet；First centrifugal pump（3）With the second centrifugal pump（4）Respectively
Equipped with respective inlet and outlet；The venturi mixer（5）It is equipped with the second water inlet（51）, the second air inlet（52）,
Liquid-vapor mixture exports（53）；The second absorption tower（6）Inside it is equipped with the second demister successively from top to bottom（61）, valve plate
（62）, the second filler（63）And third filler（64）；The second absorption tower（6）Top be equipped with the second gas outlet（65）、
Bottom is equipped with the second water outlet（610）, side is in the second demister（61）And valve plate（62）Between position be equipped with third
Water inlet（66）, side is in valve plate（62）With the second filler（63）Between position be equipped with the 4th water inlet（67）, side
In the second filler（63）With third filler（64）Between position be equipped with liquid-vapor mixture import（68）, side is in third filler
（64）Lower part is equipped with third air inlet（69）；The third absorption tower（7）Inside it is equipped with the 4th filler（73）, top goes out equipped with third
Gas port（71）, bottom be equipped with brine outlet（75）, side be higher than the 4th filler（73）Position be equipped with acid solution import（72）, side
Face is less than the 4th filler（73）Position be equipped with the 4th air inlet（74）；
Ammonia-contaminated gas is from first absorption tower（1）The first air inlet（14）Into first absorption tower（1）First go out
The mouth of a river（15）With the first centrifugal pump（3）Import be connected, first centrifugal pump（3）Outlet and heat exchanger（2）Import
It is connected, the heat exchanger（2）Outlet pass through the second threeway（102）After be divided into two-way, be ammonium hydroxide outlet all the way, another way leads to
Cross the first threeway（101）After be divided into two-way, all the way with the first absorption tower（1）The first water inlet（16）It is connected, another way
With second centrifugal pump（4）Outlet be connected, the second centrifugal pump（4）Import and second absorption tower（6）Second water outlet
Mouthful（610）It is connected；First absorption tower（1）The first gas outlet（13）Pass through third threeway（103）After be divided into two-way, one
Road and the venturi mixer（5）The second air inlet（52）It is connected, another way and the second absorption tower（6）Third
Air inlet（69）It is connected；Soft water passes through the 4th threeway（104）After be divided into two-way, all the way with second absorption tower（6）Third into
The mouth of a river（66）It is connected, another way passes through the 5th threeway（105）After be divided into two-way, all the way with second absorption tower（6）The 4th into
The mouth of a river（67）It is connected, another way and venturi mixer（5）The second water inlet（51）It is connected；The venturi mixer
（5）Liquid-vapor mixture outlet（53）With second absorption tower（6）Liquid-vapor mixture import（68）It is connected；Described second absorbs
Tower（6）The second gas outlet（65）With third absorption tower（7）The 4th air inlet（74）It is connected.
2. a kind of ammonia-contaminated gas absorption system according to claim 1, it is characterised in that：The second absorption tower（6）'s
Valve plate（62）Percent opening for 12 ~ 20%, the valve plate（62）Float valve be F-1 type float valves.
3. a kind of ammonia-contaminated gas absorption system according to claim 1, it is characterised in that：The second absorption tower（6）'s
Second filler（63）To dissipate the stainless steel Pall ring of heap, the size of the Pall ring is 25 mm of diameter, high 25 mm, wall thickness 1.6
mm。
4. a kind of ammonia-contaminated gas absorption system according to claim 1, it is characterised in that：The second absorption tower（6）'s
Third filler（64）To dissipate the stainless steel Pall ring of heap, the size of the Pall ring is 16 mm of diameter, high 16 mm, wall thickness 1.0
mm。
5. a kind of ammonia-contaminated gas absorption system according to claim 1, it is characterised in that：The third absorption tower（7）'s
4th filler（73）For ion exchange resin, the ion exchange resin is macropore strong acid polystyrene cation exchange tree
Fat, model D001.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721590554.7U CN207520833U (en) | 2017-11-24 | 2017-11-24 | A kind of ammonia-contaminated gas absorption system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721590554.7U CN207520833U (en) | 2017-11-24 | 2017-11-24 | A kind of ammonia-contaminated gas absorption system |
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Family
ID=62580089
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715659A (en) * | 2017-11-24 | 2018-02-23 | 宁波工程学院 | A kind of ammonia-contaminated gas absorption system |
| RU2712588C1 (en) * | 2018-12-28 | 2020-01-29 | Акционерное общество "Ангарскнефтехимпроект" (АО "АНХП") | Method of purifying gaseous ammonia recovered from process condensates |
| RU2732023C1 (en) * | 2019-10-14 | 2020-09-10 | Акционерное общество "Ангарскнефтехимпроект" (АО "АНХП") | Rectification column for separation of steam-gas mixture of water vapour, ammonia and hydrogen sulphide |
-
2017
- 2017-11-24 CN CN201721590554.7U patent/CN207520833U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715659A (en) * | 2017-11-24 | 2018-02-23 | 宁波工程学院 | A kind of ammonia-contaminated gas absorption system |
| RU2712588C1 (en) * | 2018-12-28 | 2020-01-29 | Акционерное общество "Ангарскнефтехимпроект" (АО "АНХП") | Method of purifying gaseous ammonia recovered from process condensates |
| RU2732023C1 (en) * | 2019-10-14 | 2020-09-10 | Акционерное общество "Ангарскнефтехимпроект" (АО "АНХП") | Rectification column for separation of steam-gas mixture of water vapour, ammonia and hydrogen sulphide |
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