CN106345234A - Tail gas purification device for pickling line - Google Patents
Tail gas purification device for pickling line Download PDFInfo
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- CN106345234A CN106345234A CN201610920446.5A CN201610920446A CN106345234A CN 106345234 A CN106345234 A CN 106345234A CN 201610920446 A CN201610920446 A CN 201610920446A CN 106345234 A CN106345234 A CN 106345234A
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- heat exchanger
- acid mist
- graphite heat
- tower
- support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/002—Separation 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 absorption
- B01D53/1456—Removing acid components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a tail gas purification device for a pickling line. The device comprises an acid mist washing tower, a graphite heat exchanger, a water cooling tower, a chimney and a graphite heat exchanger water-circulating pump, wherein the acid mist washing tower is connected with the graphite heat exchanger; the graphite heat exchanger is connected with the water cooling tower and the chimney; the water cooling tower is connected with the graphite heat exchanger water-circulating pump; the graphite heat exchanger water-circulating pump is connected with the graphite heat exchanger; the acid mist washing tower is used for receiving the acid pickling tail gas from the pickling line and comprises a tower bottom, a tower body and an upper head; a structured packing made from polypropylene is filled in the tower body; a packing support is arranged under the tower body; a gas distribution plate is arranged on the packing support; a plurality of gas guide columns are uniformly arranged on the gas distribution plate; a nozzle component is arranged above the structured packing; the graphite heat exchanger is used for condensing the acid pickling tail gas discharged from the acid mist washing tower; and the water cooling tower is used for cooling high-temperature water discharged by the graphite heat exchanger.
Description
Technical field
The invention belongs to pickling line tail gas disposal technique field is and in particular to a kind of exhaust gas cleaner of pickling line.
Background technology
At present, domestic steel industry has hundreds of pickling lines, and form has continuous pickling, plug-type pickling etc.,
In pickling process, because acid cleaning process determines (descaling bath needs micro-negative pressure operation to discharge tail gas), just there is substantial amounts of hcl gas
Can evaporate from descaling bath with vapor, after acid mist is scrubbed, enter air, this technical process is imitated to the washing of hcl
Really undesirable, cause the loss of a large amount of hydrochloric acid, the exhaust emissions index simultaneously discharged does not meet GB gb28665-2012 yet will
Ask, to environment, cause no small loss to enterprise.
The every m of pickling unit in steel industry31500～2000mg/m is contained in the tail gas discharged3, it is only capable of with rinsing water washing
Wash away small part and do not reach discharge standard and require, cause environmental pollution, recycle these resources, elimination pollution becomes ten
Divide meaningful.
In prior art, pickling one ton of steel consumption about 2kg hydrochloric acid, the overwhelming majority is discharged by pickling acid fog blower fan, right
For producing 1200000 tons of acid-cleaning plate pickling units per year in one, give off 734.4 tons of hydrochloric acid every year, therefore reclaim this part hydrochloric acid
There are very big economic implications.
In view of environmental conservation is the restraining factors of socio-economic development all the time, sustainable development has to set up and protects in environment
On the basis of shield, economic development at the cost of the environment is unsustainable.Patent 2012105121978 discloses one kind
Deacidification desulfurizer, including gas approach runner, removes acid tower, exhanst gas outlet runner, described gas approach runner and exhanst gas outlet
Runner be each provided at except the ash silo on acid tower, also including equipped with pulverized limestone, feeder, bindiny mechanism, air compressor, gas powder defeated
Send pipe, water pump, water pipe, multiple tube and the interior high-pressure atomization shower nozzle being provided with mixing die cavity, described ash silo is connected with feeder, institute
State feeder to connect with bindiny mechanism, described bindiny mechanism is connected with gas powder delivery pipe, described gas powder delivery pipe one end with empty
Air compressor connects；The described gas powder delivery pipe other end is connected with multiple tube；Described water pump is connected with water pipe one end, described water pipe
The other end is connected with multiple tube；Described multiple tube is connected with high-pressure atomization shower nozzle, and described high-pressure atomization shower nozzle is located at gas approach
In the middle part of the outlet of runner.But its purification techniques purification efficiency is low, effect difference is it is impossible to meet industrial requirement.Simultaneously as pickling
The corrosion property of gas, existing reclaimer short life, it is unsuitable for recycling on a large scale.The problems referred to above are needed badly and are solved
Certainly.
Content of the invention
It is an object of the invention to provide a kind of exhaust gas cleaner of pickling line.
For achieving the above object, the exhaust gas cleaner of pickling line of the present invention includes: acid mist scrubbing tower, graphite change
Hot device, cooling tower, chimney and graphite heat exchanger water-circulating pump；Wherein, acid mist scrubbing tower is connected with graphite heat exchanger；Graphite heat exchange
Device is connected with cooling tower and chimney；Cooling tower is connected with graphite heat exchanger water-circulating pump；Graphite heat exchanger water-circulating pump and graphite
Heat exchanger connects；
Acid mist scrubbing tower receives the pickling tail gas from pickling line, and acid mist scrubbing tower is made up of high-performance polypropylene, described
Acid mist scrubbing tower includes bottom of towe, tower body and upper cover, and bottom of towe is fixedly installed on the bottom of tower body, and upper cover is fixedly installed on tower body
Top, the inside of tower body is provided with for supporting rule equipped with the structured packing of polypropylene material, the lower section of described structured packing
The packing support of whole filler, is provided with gas distribution grid above packing support, described gas distribution grid is evenly arranged with many
Individual gas guide post；The top of structured packing is provided with nozzle assembly；It is provided with towards the direction of structured packing on nozzle assembly
At least one nozzle being made up of polypropylene；It is additionally provided with smoke inlet on the periphery wall of described acid mist scrubbing tower and flue gas goes out
Mouthful, described exhanst gas outlet is located between upper cover and nozzle assembly；Described smoke inlet is located between packing support and bottom of towe；Come
Pass through described smoke inlet from the pickling tail gas of pickling line to enter inside described acid mist scrubbing tower, pass sequentially through gas distribution grid and
Structured packing, and be fully contacted with the spray liquid of nozzle assembly ejection in structured packing, finally by described exhanst gas outlet row
Go out described acid mist scrubbing tower；
Described graphite heat exchanger is used for the pickling tail gas that condensation is discharged from described acid mist scrubbing tower, cools down pickling tail further
Gas, makes hcl gas condensation become liquid, discharges, and reduces the content discharging hcl in tail gas, and described graphite heat exchanger is graphite-pipe group
The tubular heat exchanger becoming；
Described cooling tower is vertical circular structure, and described cooling tower is used for the high temperature that cooling is discharged from described graphite heat exchanger
Water；
Described graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, for driving cooling water in graphite heat exchanger and described cool
It is circulated between water tower；
It is furnished with shaft coupling and coupling shield in described graphite heat exchanger water-circulating pump；Described graphite heat exchanger water-circulating pump
Impeller be made up of superhigh molecular weight polyethylene material, and axle envelope is sealed by Single Mechanical carborundum.
First manhole and the second manhole are additionally provided with the periphery wall of described acid mist scrubbing tower, described the first hole position is in institute
State the top of gas distribution grid corresponding with the position of structured packing；Described second manhole is corresponding with the position of nozzle assembly.
The periphery wall bottom of described acid mist scrubbing tower is additionally provided with single-piece earth anchor.
The plurality of gas guide post is equably covered with described gas distribution grid, the cross section of described gas guide post
Amass and be gradually reduced from the bottom to top.
Described nozzle assembly includes support tube, blind pipe, the first support semicanal, the first support beam, flange-interface, the second support
Semicanal, the second support beam, blind flange and pipe connecting flange, the cecum of described blind pipe is fixedly installed on support tube, described blind pipe
Opening is fixedly connected with pipe connecting flange, and described blind flange is set on the periphery wall of blind pipe, and described flange-interface is arranged on blind
On the bottom surface of pipe, connects inside flange-interface and blind pipe, flange-interface is used for connecting nozzle, the bottom of blind pipe is closely against the
In one support beam and the second support beam.
Described first support semicanal includes the first front support semicanal and the first rear support semicanal, described second support semicanal bag
Include the second front support semicanal and the second rear support semicanal, described first front support semicanal and the first rear support semicanal, before second
Support semicanal and the second rear support semicanal etc. highland is fixedly installed on the internal perisporium of described acid mist scrubbing tower, before wherein said first
Semicanal and the first rear support semicanal is supported to be relatively arranged, the second front support semicanal and the second rear support semicanal are relatively arranged,
One end of described first support beam is supported by described first front support semicanal, and the other end of described first support beam is by described first
Rear support semicanal supports, and one end of described second support beam is supported by described second front support semicanal, described second support beam
The other end is supported by described second rear support semicanal, and described first support beam is be arranged in parallel with described second support beam.
Described first support beam and described second support beam are all vertically arranged with described blind pipe.
Described support tube is fixedly installed on the internal perisporium of described acid mist scrubbing tower, and described blind flange and pipe connecting flange are arranged
In the outside of described acid mist scrubbing tower, the opening of described blind pipe is passed described acid mist scrubbing tower and is fixedly connected with pipe connecting flange,
Described blind flange is fixedly installed on the outer peripheral face of described acid mist scrubbing tower, and the opening of described blind pipe passes through pipe connecting flange with outward
Portion water source connects, and the water supply line of external water source is fixed on described acid mist scrubbing tower by described blind flange.
The present invention has the advantage that the exhaust gas cleaner of pickling line of the present invention is compared with prior art, lead to
Cross setting gas distribution grid in acid mist scrubbing tower, the tail gas making pickling line is evenly into the structured packing in acid mist scrubbing tower
And be fully contacted with spray liquid, improve purification efficiency, effective recycling has been carried out to the hcl in pickling process, has obtained
Preferable clean result, significantly reduces the toxic gas content of discharged pickling tail gas, effectively prevent environmental pollution,
And save substantial amounts of industrial resources, possess good social meaning and economic implications.In addition, acid mist scrubbing tower is pacified by the present invention
It is contained in equipment upstream, so that the acidic materials in pickling gas is absorbed and used first, the probability that equipment is corroded is preferably minimized.
Use Water Sproading acidic materials, to recycle.Spray liquid forms reverse flow with pickling tail gas, so that spray liquid and acid is reached non-
Often good syncretizing effect.After tube-type graphite heat exchanger is arranged at scrubbing tower, the hcl in condensation waste gas and steam further,
So that waste gas is further purified, reduce the exhaust temperature of waste gas.Graphite heat exchanger cooperation graphite heat exchanger water-circulating pump makes
With making whole equipment Effec-tive Function, disposal ability is strong.The high-performance polypropylene material of acid mist scrubbing tower is heat-resisting, corrosion-resistant, product
Available vapor sterilization, is particularly suitable for carrying out the recovery of hcl.It is furnished with shaft coupling and shaft coupling shield in graphite heat exchanger water-circulating pump
Cover, it is ensured that its Effec-tive Function, is made up of superhigh molecular weight polyethylene material, will not get rusty rotten, have the resistance to height of heat-and corrosion-resistant
The property of pressure.The sealing of Single Mechanical carborundum sealing is tight, and effect is good.
Brief description
Fig. 1 is the structural representation of the exhaust gas cleaner of pickling line of the present invention.
Fig. 2 is the structural representation of described acid mist scrubbing tower.
Fig. 3 is the structural representation of described nozzle assembly.
Fig. 4 is described first support semicanal 83, first support beam the 84, second support semicanal 86, the knot of the second support beam 87
Structure schematic diagram.
Specific embodiment
Following examples are used for the present invention is described, but are not limited to the scope of the present invention.
As shown in Figures 1 to 4, the exhaust gas cleaner of pickling line of the present invention includes: acid mist scrubbing tower, graphite change
Hot device, cooling tower, chimney and graphite heat exchanger water-circulating pump；Wherein, acid mist scrubbing tower is connected with graphite heat exchanger；Graphite heat exchange
Device is connected with cooling tower and chimney；Cooling tower is connected with graphite heat exchanger water-circulating pump；Graphite heat exchanger water-circulating pump and graphite
Heat exchanger connects；
Acid mist scrubbing tower receives the pickling tail gas from pickling line, and acid mist scrubbing tower is made up of high-performance polypropylene, such as Fig. 2
Shown, described acid mist scrubbing tower includes bottom of towe 1, tower body 6 and upper cover 10, and bottom of towe 1 is fixedly installed on the bottom of tower body 6, upper envelope
10 tops being fixedly installed on tower body 6, the inside of tower body 6 is equipped with the structured packing 7 of polypropylene material, described structured packing 7
Lower section be provided with packing support 3 for supporting structured packing, be provided with gas distribution grid 4 above packing support 3, described
Multiple gas guide posts are evenly arranged with gas distribution grid 4；The top of structured packing 7 is provided with nozzle assembly 8；Nozzle assembly
On 8, the direction of structured packing 7 is provided with the nozzle that at least one is made up of polypropylene；The periphery wall of described acid mist scrubbing tower
On be additionally provided with smoke inlet 12 and exhanst gas outlet 11, described exhanst gas outlet 11 be located between upper cover 10 and nozzle assembly 8；Institute
State smoke inlet 12 to be located between packing support 3 and bottom of towe 1；Pickling tail gas from pickling line is entered by described smoke inlet 12
Enter inside described acid mist scrubbing tower, pass sequentially through gas distribution grid 4 and structured packing 7, and in structured packing 7 with nozzle assembly
The spray liquid of 8 ejections is fully contacted, and discharges described acid mist scrubbing tower finally by described exhanst gas outlet 11；Described exhanst gas outlet 11
It is connected with described graphite heat exchanger；
Described graphite heat exchanger is used for the pickling tail gas that condensation is discharged from described acid mist scrubbing tower, cools down pickling tail further
Gas, makes hcl gas condensation become liquid, discharges, and reduces the content discharging hcl in tail gas, and described graphite heat exchanger is graphite-pipe group
The tubular heat exchanger becoming；
Described cooling tower is vertical circular structure, and described cooling tower is used for the high temperature that cooling is discharged from described graphite heat exchanger
Water；
Described graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, for driving cooling water in graphite heat exchanger and described cool
It is circulated between water tower；
It is furnished with shaft coupling and coupling shield in described graphite heat exchanger water-circulating pump；Described graphite heat exchanger water-circulating pump
Impeller be made up of superhigh molecular weight polyethylene material, and axle envelope is sealed by Single Mechanical carborundum.
First manhole 5 and the second manhole 9 be additionally provided with the periphery wall of described acid mist scrubbing tower, described first manhole 5
In the top of described gas distribution grid 4 and corresponding with the position of structured packing 7；Described second manhole 9 and the position of nozzle assembly 8
Corresponding.
The periphery wall bottom of described acid mist scrubbing tower is additionally provided with single-piece earth anchor 13.
As shown in Fig. 2 the plurality of gas guide post is equably covered with described gas distribution grid 4, described gas draws
The cross-sectional area of guide pillar is gradually reduced from the bottom to top.
Gas distribution grid 4 makes tail gas evenly into structured packing 7, it is to avoid tail gas excessively concentrates on certain.Existing skill
Traditional acid mist scrubbing tower in art easily cause in structured packing gas circuit short circuit, that is, tail gas concentrate on a certain in structured packing
Bar gap, directly through structured packing, is then discharged out acid mist scrubbing tower.It is insufficient contact with spray liquid that this results in tail gas, contact
Time is short, thus affecting purification efficiency.
The present invention passes through setting gas distribution grid 4 and solves the problems referred to above, and gas distribution grid 4 guiding tail gas is in structured packing
It is uniformly distributed on 7 whole cross section, thus reducing the probability that gas circuit short circuit occurs.And the horizontal stroke due to gas guide post
Sectional area is gradually reduced from the bottom to top, makes gradually to accelerate by the exhaust gas flow speed of gas guide post, is entering structured packing 7
Spot speed reach peak value, pour at a high speed structured packing, improve the contact area of the spray liquid in tail gas and structured packing 7
And time of contact, thus improve purification efficiency.
As shown in figure 3, described nozzle assembly 8 includes support tube 81, blind pipe 82, first supports semicanal 83, the first support beam
84th, flange-interface 85, second supports semicanal 86, the second support beam 87, blind flange 88 and pipe connecting flange 89, described blind pipe 82 blind
End is fixedly installed on support tube 81, and the opening of described blind pipe 82 is fixedly connected with pipe connecting flange 89, and described blind flange 88 is worn
It is enclosed within the periphery wall of blind pipe 82, described flange-interface 85 is arranged on the bottom surface of blind pipe 82, in flange-interface 85 and blind pipe 82
Portion connects, and flange-interface 85 is used for connecting nozzle, and the bottom of blind pipe 82 is closely against in the first support beam 84 and the second support beam
On 87.
As shown in figure 4, described first support semicanal 83 includes the first front support semicanal 831 and the first rear support semicanal 832,
Described second support semicanal 86 includes the second front support semicanal 861 and the second rear support semicanal 862, described first front support semicanal
The highland such as 831 and the first rear support semicanal 832, the second front support semicanal 861 and the second rear support semicanal 862 is fixedly installed on institute
State on the internal perisporium of acid mist scrubbing tower, wherein said first front support semicanal 831 and the first rear support semicanal 832 relatively cloth
Put, the second front support semicanal 861 and the second rear support semicanal 862 are relatively arranged, one end of described first support beam 84 is by institute
State the first front support semicanal 831 to support, the other end of described first support beam 84 is supported by described first rear support semicanal 832,
One end of described second support beam 87 is supported by described second front support semicanal 861, the other end of described second support beam 87 by
Described second rear support semicanal 862 supports, and described first support beam 84 is be arranged in parallel with described second support beam 87.
Described first support beam 84 and described second support beam 87 are all vertically arranged with described blind pipe 82.
Described support tube 81 is fixedly installed on the internal perisporium of described acid mist scrubbing tower, described blind flange 88 and pipe connecting flange
89 outsides being arranged on described acid mist scrubbing tower, the opening of described blind pipe 82 passes described acid mist scrubbing tower and pipe connecting flange 89
It is fixedly connected, described blind flange 88 is fixedly installed on the outer peripheral face of described acid mist scrubbing tower, the opening of described blind pipe 82 leads to
Cross pipe connecting flange 89 to be connected with external water source, the water supply line of external water source is fixed on described acid mist by described blind flange 88 and washes
Wash on tower.
The present invention arrange two described in graphite heat exchanger water-circulating pump, one work when, in addition one standby；Two groups
Graphite heat exchanger water-circulating pump is all connected with cooling tower and graphite heat exchanger.
Acid mist scrubbing tower of the present invention is made up of pph material (high-performance polypropylene), and acid mist scrubbing tower is built with poly-
The filler of propylene material, acid mist scrubbing tower inner upper is provided with the nozzle that at least one polypropylene is made, and nozzle can will spray
Liquid is evenly distributed on filler, and the spray liquid on filler forms reverse flow, packing material absorbing with the pickling tail gas containing water and hcl
After hcl, hcl and spray liquid are mixed together the acid generating concentration about 8～10%.
Wherein, the spray liquid of nozzle distribution is water.
Spray liquid is (0.3-2) with the volume ratio of pickling tail gas: 1.
The speed of Water spray to graphite heat exchanger top is 1.5-2.5m by graphite heat exchanger water-circulating pump3/h.
Pickling tail gas is 80 DEG C when entering purifier.
Graphite heat exchanger is lowered the temperature to the pickling tail gas entering before chimney, is down to less than 40 DEG C.
The work process of the exhaust gas cleaner of pickling line of the present invention is as follows:
As direction of the arrows shown in fig, the pickling tail gas from pickling line enters described acid mist washing by smoke inlet 12
Tower (about 80 DEG C of the temperature of pickling tail gas), passes sequentially through gas distribution grid 4 and structured packing 7, by nozzle by spray liquid (water)
It is evenly distributed on the filler in acid mist scrubbing tower, make spray liquid on filler and the pickling tail gas containing water and hcl be formed inverse
To flowing, the spray liquid that pickling tail gas is sprayed with nozzle assembly 8 in structured packing 7 is fully contacted, and packing material absorbing is most
After hcl, hcl and spray liquid are mixed together the acid generating concentration about 8～10%；Then, remaining pickling tail gas passes through described cigarette
The gas outlet 11 described acid mist scrubbing tower of discharge, enters graphite heat exchanger；
The exhaust temperature discharged from acid mist scrubbing tower is high, and still contains hcl gas and steam in tail gas, adds that graphite changes
After hot device, the further cooled exhaust gas of graphite heat exchanger, make hcl gas condensation become liquid, discharge, which reduce in discharge tail gas
The content of hcl, and play the effect of cooling.
Graphite heat exchanger water-circulating pump extracts water in cooling tower and sprays graphite heat exchanger top, is lowered the temperature, fall
The water of temperature is walked shell side and is flowed into cooling tower along outside graphite heat exchanger, by the speed at Water spray to graphite heat exchanger top is wherein
2m3/h；Additionally, graphite heat exchanger synchronizes cooling to pickling tail gas, the steam in pickling tail gas forms liquid after being condensed
Enter cooling tower, after remaining pickling tail gas (in view of current industrial level, necessarily also remaining a small amount of hcl) is cooled to 40 DEG C,
Walk tube side feeding chimney to be discharged.
The cooling water collected in it is carried out cooling process by cooling tower, so that graphite heat exchanger water-circulating pump uses.
Wherein, after the acid collected in acid mist scrubbing tower reaches some, acid is recycled and is continuing with.
Clean-up effect in the middle of present invention reality: guarantee value hcl≤10mg/nm3, desired value hcl≤5mg/nm3；Contrast state
Mark gb28665-2012:hcl≤30mg/nm3.The every m of pickling unit in steel industry3In the tail gas discharged containing 1500～
2000mg/m3, it is only capable of washing away small part with rinsing water washing and does not reach discharge standard and require, cause environmental pollution, this
Bright can recycle in a large number these resources, eliminate pollution, extremely have social meaning.Additionally, one ton of steel of pickling in prior art
Material consumes about 2kg hydrochloric acid, and the overwhelming majority is discharged by pickling acid fog blower fan, for 1,200,000 tons of acid-cleaning plate pickling machines of an annual output
Group gives off 734.4 tons of hydrochloric acid every year, and the therefore present invention reclaims this part hydrochloric acid, has very big economic implications.
Although, the present invention is described in detail, at this above to have used general explanation and specific embodiment
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (8)
1. a kind of exhaust gas cleaner of pickling line is it is characterised in that the exhaust gas cleaner of described pickling line includes: acid mist is washed
Wash tower, graphite heat exchanger, cooling tower, chimney and graphite heat exchanger water-circulating pump；Wherein, acid mist scrubbing tower and graphite heat exchanger phase
Connect；Graphite heat exchanger is connected with cooling tower and chimney；Cooling tower is connected with graphite heat exchanger water-circulating pump；Graphite heat exchanger water follows
Ring pump is connected with graphite heat exchanger；
Acid mist scrubbing tower receives the pickling tail gas from pickling line；
Described graphite heat exchanger is used for the pickling tail gas that condensation is discharged from described acid mist scrubbing tower, cools down pickling tail gas further,
Make hcl gas condensation become liquid, discharge, reduce the content discharging hcl in tail gas, described graphite heat exchanger forms for graphite-pipe
Tubular heat exchanger；
Described cooling tower is vertical circular structure, and described cooling tower is used for the high-temperature water that cooling is discharged from described graphite heat exchanger；
Described graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, for driving cooling water in graphite heat exchanger and described cooling tower
Between be circulated；
It is furnished with shaft coupling and coupling shield in described graphite heat exchanger water-circulating pump；The leaf of described graphite heat exchanger water-circulating pump
Wheel is made up of superhigh molecular weight polyethylene material, and axle envelope is sealed by Single Mechanical carborundum.
2. the exhaust gas cleaner of pickling line as claimed in claim 1 is it is characterised in that described acid mist scrubbing tower is by high-performance
Polypropylene is made, and described acid mist scrubbing tower includes bottom of towe, tower body and upper cover, and bottom of towe is fixedly installed on the bottom of tower body, upper envelope
Head is fixedly installed on the top of tower body, and the inside of tower body is equipped with the structured packing of polypropylene material, the lower section of described structured packing
It is provided with the packing support for supporting structured packing, above packing support, be provided with gas distribution grid, described gas distribution
Multiple gas guide posts are evenly arranged with plate；The top of structured packing is provided with nozzle assembly；Towards regular on nozzle assembly
The direction of filler is provided with the nozzle that at least one is made up of polypropylene；It is additionally provided with cigarette on the periphery wall of described acid mist scrubbing tower
Gas entrance and exhanst gas outlet, described exhanst gas outlet is located between upper cover and nozzle assembly；Described smoke inlet props up positioned at filler
Between support and bottom of towe；Pass through described smoke inlet from the pickling tail gas of pickling line and enter inside described acid mist scrubbing tower, successively
By gas distribution grid and structured packing, and the spray liquid being sprayed with nozzle assembly in structured packing is fully contacted, and finally leads to
Cross described exhanst gas outlet and discharge described acid mist scrubbing tower；First manhole and are additionally provided with the periphery wall of described acid mist scrubbing tower
Two manholes, described the first hole position is in the top of described gas distribution grid and corresponding with the position of structured packing；Described second people
Hole is corresponding with the position of nozzle assembly.
3. the exhaust gas cleaner of pickling line as claimed in claim 2 is it is characterised in that the periphery wall of described acid mist scrubbing tower
Bottom is additionally provided with single-piece earth anchor.
4. the exhaust gas cleaner of pickling line as claimed in claim 3 is it is characterised in that the plurality of gas guide post is uniform
Ground is covered with described gas distribution grid, and the cross-sectional area of described gas guide post is gradually reduced from the bottom to top.
5. the exhaust gas cleaner of pickling line as claimed in claim 3 is it is characterised in that described nozzle assembly includes supporting
Pipe, blind pipe, the first support semicanal, the first support beam, flange-interface, the second support semicanal, the second support beam, blind flange and adapter
Flange, the cecum of described blind pipe is fixedly installed on support tube, and the opening of described blind pipe is fixedly connected with pipe connecting flange, described
Blind flange is set on the periphery wall of blind pipe, and described flange-interface is arranged on the bottom surface of blind pipe, inside flange-interface and blind pipe
Connection, flange-interface is used for connecting nozzle, and the bottom of blind pipe is closely against in the first support beam and the second support beam.
6. the exhaust gas cleaner of the pickling line as described in claim 4 or 5 is it is characterised in that described first supports semicanal bag
Include the first front support semicanal and the first rear support semicanal, described second support semicanal props up after including the second front support semicanal and second
Support semicanal, described first front support semicanal and the first rear support semicanal, the second front support semicanal and the second rear support semicanal are contour
Be fixedly installed on the internal perisporium of described acid mist scrubbing tower, wherein said first front support semicanal and the first rear support semicanal phase
Arrange over the ground, the second front support semicanal and the second rear support semicanal are relatively arranged, and one end of described first support beam is by described
First front support semicanal supports, and the other end of described first support beam is supported by described first rear support semicanal, described second
One end of support beam is supported by described second front support semicanal, and the other end of described second support beam is by described second rear support semicanal
Support, described first support beam is be arranged in parallel with described second support beam.
7. the exhaust gas cleaner of pickling line as claimed in claim 6 is it is characterised in that described first support beam and described
Two support beams are all vertically arranged with described blind pipe.
8. the exhaust gas cleaner of pickling line as claimed in claim 7 is it is characterised in that described support tube is fixedly installed on institute
State on the internal perisporium of acid mist scrubbing tower, described blind flange and pipe connecting flange are arranged on the outside of described acid mist scrubbing tower, described blind
The opening of pipe is passed described acid mist scrubbing tower and is fixedly connected with pipe connecting flange, and described blind flange is fixedly installed on described acid mist and washes
Wash on the outer peripheral face of tower, the opening of described blind pipe is connected with external water source by pipe connecting flange, the water supply line of external water source
It is fixed on described acid mist scrubbing tower by described blind flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920446.5A CN106345234A (en) | 2016-10-21 | 2016-10-21 | Tail gas purification device for pickling line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920446.5A CN106345234A (en) | 2016-10-21 | 2016-10-21 | Tail gas purification device for pickling line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106345234A true CN106345234A (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610920446.5A Pending CN106345234A (en) | 2016-10-21 | 2016-10-21 | Tail gas purification device for pickling line |
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| Country | Link |
|---|---|
| CN (1) | CN106345234A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824320A (en) * | 1981-08-05 | 1983-02-14 | Hitachi Plant Eng & Constr Co Ltd | Gas scrubber |
| CN2480037Y (en) * | 2001-05-17 | 2002-03-06 | 中国石化集团南京化学工业有限公司氮肥厂 | Beams less padding tower with high-efficient multi-function inner piece |
| CN201470140U (en) * | 2009-09-03 | 2010-05-19 | 尤福军 | Acid mist recycling purifier of cold-rolling pickling line with acid mist condenser |
| CN104645790A (en) * | 2015-02-10 | 2015-05-27 | 成都阿斯特克国龙环保工程有限公司 | Smoke purification system and method for pickling line |
-
2016
- 2016-10-21 CN CN201610920446.5A patent/CN106345234A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824320A (en) * | 1981-08-05 | 1983-02-14 | Hitachi Plant Eng & Constr Co Ltd | Gas scrubber |
| CN2480037Y (en) * | 2001-05-17 | 2002-03-06 | 中国石化集团南京化学工业有限公司氮肥厂 | Beams less padding tower with high-efficient multi-function inner piece |
| CN201470140U (en) * | 2009-09-03 | 2010-05-19 | 尤福军 | Acid mist recycling purifier of cold-rolling pickling line with acid mist condenser |
| CN104645790A (en) * | 2015-02-10 | 2015-05-27 | 成都阿斯特克国龙环保工程有限公司 | Smoke purification system and method for pickling line |
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Application publication date: 20170125 |