CN207254046U - A kind of steel drum application fume afterheat and solvent recovery unit - Google Patents

A kind of steel drum application fume afterheat and solvent recovery unit Download PDF

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Publication number
CN207254046U
CN207254046U CN201721254693.2U CN201721254693U CN207254046U CN 207254046 U CN207254046 U CN 207254046U CN 201721254693 U CN201721254693 U CN 201721254693U CN 207254046 U CN207254046 U CN 207254046U
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gas
steel drum
outlet
recovery unit
tower
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CN201721254693.2U
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李跃
鲁志昂
夏莫逆
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ZHUZHOU TORCH INDUSTRY FURNACE Co Ltd
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ZHUZHOU TORCH INDUSTRY FURNACE Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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Abstract

The utility model discloses a kind of steel drum application fume afterheat and solvent recovery unit, including gas-gas heat exchanger, gas-liquid heat-exchange, absorption tower, bleaching tower and storage tank;The exhanst gas outlet of gas-gas heat exchanger is connected with the gas inlet of gas-liquid heat-exchange, the exhanst gas outlet of gas-liquid heat-exchange is connected with the gas inlet on absorption tower, the exhanst gas outlet on absorption tower is used to connect with chimney, the recycling design outlet on absorption tower and the inlet communication of bleaching tower, the outlet of bleaching tower and the inlet communication of storage tank.Using steel drum application fume afterheat provided by the utility model and solvent recovery unit, the organic solvent that effectively steel drum painting can be produced and the exhaust gas such as coating cloud that disperse are handled, while making flue gas qualified discharge, fume afterheat is recycled, and organic solvent is obtained using absorption tower is classified.Economy is good, easy to use.Substantial amounts of energy consumption is saved, solvent-recoverable, improves the problem of environmental pollution that steel drum painting process produces.

Description

A kind of steel drum application fume afterheat and solvent recovery unit
Technical field
The utility model is related to steel drum application techniques field, more specifically to a kind of steel drum application fume afterheat with Solvent recovery unit.
Background technology
At present, the method for the fume treatment of steel drum paint industry is also in jejune stage, the wherein waste heat in flue gas It is substantially all and fails to be utilized and directly empty, not only waste of energy but also has polluted environment.
The flue gas produced in steel drum painting, mainly substantial amounts of organic solvent volatile gas body and the coating cloud to disperse.Mesh The processing method of preceding volatile organic matter (VOCs) mainly has two classes:One kind is destructive null method, such as burns and catalysis is burnt Method etc., CO is converted into by VOCs2And H2O;Another kind of is absorption method, such as carbon adsorption method, absorption process, condensation method and membrane separation process.
However, some steel drum manufacturer conditions are poor, coating process, equipment tool, painting environment and operation be not horizontal high, The environmental protection measure taken is bad with effect, causes organic solvent and over-sprayed paint fog still to have phase because discharge recycling treatment effect is not good enough When degree organic solvent and disperse and the exhaust emission such as coating cloud environment and endanger the health of operator.
Cause environmental pollution in conclusion how to efficiently solve steel drum application, endanger the problems such as operator is healthy, be mesh Preceding those skilled in the art's urgent problem.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of steel drum application fume afterheat and solvent recovery unit, The structure design of the steel drum application fume afterheat and solvent recovery unit can efficiently solve steel drum application cause environmental pollution, Endanger the problem of operator is healthy.
In order to achieve the above object, the utility model provides following technical solution:
A kind of steel drum application fume afterheat and solvent recovery unit, including gas-gas heat exchanger, gas-liquid heat-exchange, absorption tower, Bleaching tower and storage tank;The exhanst gas outlet of the gas-gas heat exchanger is connected with the gas inlet of the gas-liquid heat-exchange, the gas The exhanst gas outlet of liquid heat exchanger is connected with the gas inlet on the absorption tower, and the exhanst gas outlet on the absorption tower is used to connect with chimney It is logical, the recycling design outlet and the inlet communication of the bleaching tower, the outlet of the bleaching tower and the storage on the absorption tower The inlet communication of tank.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the gas-gas heat exchanger is empty for heat pipe-type Pre- device, the gas-liquid heat-exchange are fin-tube heat exchanger.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the heat outlet of the gas-gas heat exchanger For being connected with combustion chamber.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the absorption tower is classification absorption tower, is wrapped Upper column and lower tower are included, the upper column is both provided with spray tube with the lower tower.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the outlet of the upper column and recirculated water The inlet communication of case, the water outlet of the cyclic water tank are connected by water pump with the spray tube of the upper column.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, between the water pump and the upper column It is connected with First Heat Exchanger.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the First Heat Exchanger is plate-type heat-exchange Device.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the outlet of the lower tower with it is organic molten Agent pump connection, the spray tube exported respectively with the bleacher and the lower tower of the organic solvent pump connect.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, the organic solvent pump and the lower part The second heat exchanger is connected between tower.
Preferably, in above-mentioned steel drum application fume afterheat and solvent recovery unit, second heat exchanger is plate-type heat-exchange Device.
Steel drum application fume afterheat provided by the utility model includes gas-gas heat exchanger, gas-liquid heat exchange with solvent recovery unit Device, absorption tower, bleaching tower and storage tank.Wherein, the exhanst gas outlet of gas-gas heat exchanger is connected with the gas inlet of gas-liquid heat-exchange, The exhanst gas outlet of gas-liquid heat-exchange is connected with the gas inlet on absorption tower, and the exhanst gas outlet on absorption tower is used to connect with chimney, inhales Receive recycling design outlet and the inlet communication of bleaching tower, the outlet of bleaching tower and the inlet communication of storage tank of tower.
Using steel drum application fume afterheat provided by the utility model and solvent recovery unit, (170 DEG C of steel drum application flue gas Left and right) first by gas-gas heat exchanger, it is again that the dielectric gas (such as air) in gas-gas heat exchanger is pre- while flue gas is cooled down Heat, flue-gas temperature can drop to 100 DEG C or so, the dielectric gas returning equipment of preheating, there is provided hot wind, reduces natural gas dosage.By The flue gas of the exhanst gas outlet discharge of gas-gas heat exchanger travels further into gas-liquid heat-exchange, by gas-liquid heat exchange while flue gas is cooled down Media fluid (such as water) heating of device, after flue gas drops to 60 DEG C, cold water can be heated to 70 DEG C or so, and the media fluid after heating can For producing and living.Flue gas after gas-liquid heat-exchange drops to 60 DEG C, then into absorption tower, catches and absorbs, in flue gas The oil content such as solvent become liquid recycling (>=95%), recovered solvent enters bleaching tower by recycling design outlet, by decolourizing After tower processing, storage tank storage is flowed into, commodity selling can be used as, oneself can also used.Remaining flue gas is then through chimney Catalytic oxidation treatment qualified discharge.To sum up, steel drum application fume afterheat and solvent recovery unit provided by the utility model, can The organic solvent that effectively steel drum painting is produced and the exhaust gas such as coating cloud that disperse are handled, and make the same of flue gas qualified discharge When, fume afterheat is recycled, and organic solvent is obtained using absorption tower is classified.Economy is good, easy to use.Section Substantial amounts of energy consumption is saved, solvent-recoverable, improves the problem of environmental pollution that steel drum painting process produces.Wherein waste heat returns Yield is more than 30%, and solvent recovering rate is more than 95%, and exhaust emissions limit value is less than 20mg/m3
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is steel drum application fume afterheat provided by the utility model and a kind of embodiment of solvent recovery unit Structure diagram.
Marked in attached drawing as follows:
Gas-gas heat exchanger 1, gas-liquid heat-exchange 2, absorption tower 3, First Heat Exchanger 41, the second heat exchanger 42, organic solvent pump 5, bleaching tower 6, storage tank 7, wind turbine 8, chimney 9, water pump 10, cyclic water tank 11.
Embodiment
The utility model embodiment discloses a kind of steel drum application fume afterheat and solvent recovery unit, to improve steel drum painting Fill the environmental pollution that production process produces.
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of specific with solvent recovery unit for steel drum application fume afterheat provided by the utility model The structure diagram of embodiment.
In a specific embodiment, steel drum application fume afterheat provided by the utility model includes with solvent recovery unit Gas-gas heat exchanger 1, gas-liquid heat-exchange 2, absorption tower 3, bleaching tower 6 and storage tank 7.
Wherein, the exhanst gas outlet of gas-gas heat exchanger 1 is connected with the gas inlet of gas-liquid heat-exchange 2, the cigarette of gas-liquid heat-exchange 2 Gas outlet is connected with the gas inlet on absorption tower 3, and the exhanst gas outlet on absorption tower 3 is used to connect with chimney 9, the recycling on absorption tower 3 Solvent outlet and the inlet communication of bleaching tower 6, the outlet of bleaching tower 6 and the inlet communication of storage tank 7.Namely flue gas passes through successively Gas-gas heat exchanger 1, gas-liquid heat-exchange 2, absorption tower 3 are crossed, catalysis of the flue gas through chimney 9 discharged by the exhanst gas outlet on absorption tower 3 Oxidation processes qualified discharge.
Gas-gas heat exchanger 1 is the heat exchanger using gas as medium, its concrete structure refer to the prior art, no longer superfluous herein State.Gas-gas heat exchanger 1 has heat outlet, for being discharged with the hot gas after flue gas heat exchange.Specifically, gas-gas heat exchanger 1 can To use heat pipe-type air preheater.Heat transferring medium is specifically as follows air, and hot-air can return after by flue gas cooling, temperature is elevated Receive and utilize.
Gas-liquid heat-exchange 2 is the heat exchanger using liquid as medium, its concrete structure refer to the prior art, no longer superfluous herein State.Gas-liquid heat-exchange 2 has liquid outlet, for being discharged with the high-temp liquid after flue gas heat exchange.Specifically, gas-liquid heat-exchange 2 can use fin-tube heat exchanger.Heat transferring medium is specifically as follows water, and hot water can return after by flue gas cooling, temperature is elevated Receive and utilize.
Absorption tower 3 is the reaction tower by the pernicious gas sorption enhanced in flue gas for solvent, its concrete structure by spray The prior art is refer to, details are not described herein again.
Bleaching tower 6 is the device for being used to carry out organic solvent decolorization.It is specifically not limited to tower structure, also may be used Think jar structure etc., only need that decolorization can be carried out to organic solvent.
Storage tank 7 is to be used for the device that is stored spare organic solvent after decolorization, its concrete structure this Place does not limit, and sets according to specific needs.
Using steel drum application fume afterheat provided by the utility model and solvent recovery unit, (170 DEG C of steel drum application flue gas Left and right) first by gas-gas heat exchanger 1, again by the dielectric gas (such as air) in gas-gas heat exchanger 1 while flue gas is cooled down Preheating, flue-gas temperature can drop to 100 DEG C or so, the dielectric gas returning equipment of preheating, there is provided hot wind, reduces natural gas dosage. The flue gas discharged by the exhanst gas outlet of gas-gas heat exchanger 1 travels further into gas-liquid heat-exchange 2, by gas-liquid while flue gas is cooled down Media fluid (such as water) heating of heat exchanger 2, after flue gas drops to 60 DEG C, cold water can be heated to 70 DEG C or so, the medium after heating Liquid can be used for producing and living.Flue gas after gas-liquid heat-exchange 2 drops to 60 DEG C, then into absorption tower 3, catches and inhales Receive, the oil content such as solvent in flue gas becomes liquid recycling (>=95%), and recovered solvent enters bleaching tower by recycling design outlet 6, after the processing of bleaching tower 6, flow into storage tank 7 and store, commodity selling can be used as, oneself can also use.Remaining cigarette The gas then catalytic oxidation treatment qualified discharge through chimney 9.
To sum up, steel drum application fume afterheat and solvent recovery unit provided by the utility model, effectively can apply steel drum The organic solvent that dress production produces and the exhaust gas such as coating cloud that disperse are handled, while making flue gas qualified discharge, by fume afterheat Recycled, and organic solvent is obtained using absorption tower 3 is classified.Economy is good, easy to use.Save the substantial amounts of energy Consumption, solvent-recoverable, improves the problem of environmental pollution that steel drum painting process produces.Wherein waste heat recovery rate is more than 30%, solvent recovering rate is more than 95%, and exhaust emissions limit value is less than 20mg/m3
Preferably, the heat outlet of gas-gas heat exchanger 1 is used to be connected with combustion chamber.And then medium while flue gas is cooled down Gas temperature raises, and the dielectric gas of preheating returns to combustion chamber, there is provided hot wind, reduces natural gas dosage.
On the basis of the various embodiments described above, absorption tower 3 is to be classified absorption tower 3, including upper column and lower tower, upper column Spray tube is both provided with lower tower.Flue gas enters absorption tower 3 from lower part and becomes clean gas after two-stage sprays from suction Receive the discharge of the top of tower 3.Namely set by the classification of upper column and lower tower, the flue gas for entering absorption tower 3 is carried out respectively Multistep treatment, to improve the absorptivity of pernicious gas in flue gas, further lifts environment protecting.Preferably, the spray of upper column The spray liquid of pipe is water, and the spray liquid of the spray tube of lower tower is organic solvent.
Further, the outlet of upper column and the inlet communication of cyclic water tank 11, the water outlet of cyclic water tank 11 pass through water Pump 10 is connected with the spray tube of upper column.It is restored to upper column so as to which water is exported by cyclic water tank 11 after water pump 10 and sprays again Leaching, forms water circulation, is effectively saved the energy, reduces energy consumption.
Further, First Heat Exchanger 41 is connected between water pump 10 and upper column.Specifically, First Heat Exchanger 41 is Plate heat exchanger.Certainly, the heat exchanger of other forms can also be used as needed.Pass through the setting of First Heat Exchanger 41, energy It is enough effectively to reduce the water temperature for flowing into jet pipe, damage spray tube to prevent water temperature over-high.
Preferably, the outlet of lower tower and organic solvent pump 5 connect, organic solvent pump 5 outlet respectively with bleacher and The spray tube connection of lower tower.And then the circulation of organic solvent is formed, an organic solvent part for the outlet outflow of lower tower is returned The spray tube for also arriving lower tower catches absorption again, and another part enters 6 decolorization of bleaching tower.
Further, it is connected with the second heat exchanger 42 between organic solvent pump 5 and lower tower.Specifically, the second heat exchanger 42 be plate heat exchanger.By the setting of the second heat exchanger 42, the temperature for the organic solvent for flowing into jet pipe can be effectively reduced, Spray tube is damaged to prevent temperature excessive.
This programme is illustrated with a preferred embodiment below:
Certain wrapping enterprise, steel barrel production line technique are as follows:Cleaning → degreasing → washing → zirconium → washing → drying → interior Spraying → baking-curing → cooling → trypsin method → baking-curing → cooling → lettering → warehouse.Wherein, it is interior to apply baking production line Produce tail gas main ingredient and contain repefral, it is the yellowish oily liquids of water white transparency, slightly fragranced, boiling point For 283.7 DEG C.Can be miscible with the common organic solvents such as ethanol, ether, not soluble in water and petroleum ether.It is interior to apply baking production line tail gas Measure about 12000m3/ h, about 170 DEG C of exhaust temperature, the content of wherein solvent is about 25.7kg/h;Outer painting Baking Paint production line produces Tail gas main ingredient is esters solvent, about 128 DEG C of boiling point.Tail gas amount about 20000m3/ h, wherein about 170 DEG C of exhaust temperature, solvent Content be about 42.8kg/h.Painting, outer japanning year are about 140 tons or so using solvent in the project.According to customer requirement and Related environmental emission standard requirement, need to be utilized the waste heat in tail gas, the organic solvent emission limit value in tail gas is less than 20mg/m3, and need to be recycled solvent.
Using above-mentioned steel drum application fume afterheat and solvent recovery unit, that is, utilize heat pipe heat exchanging, fin heat transfer technology By the UTILIZATION OF VESIDUAL HEAT IN of tail gas;Using Conventional solvents recovery method, i.e. normal pressure condensation catches the method for absorbing (attached), by having for tail gas Solvent recycles, and final tail gas is reached discharge standard.
Such as Fig. 1, so, steel drum application flue gas (170 DEG C or so) is first by gas-gas heat exchanger 1 (heat pipe-type air preheater), both Cooled flue gas is again by air preheat, and flue-gas temperature can drop to 100 DEG C or so, the air returning equipment (combustion chamber) of preheating, there is provided Hot wind, reduces natural gas dosage, and then flue gas enters gas-liquid heat-exchange 2 (fin-tube heat exchanger), not only cooled flue gas but also heating Cold water, after flue gas drops to 60 DEG C, cold water can be heated to 70 DEG C or so, and hot water is used for the use that produces and live.After flue gas drops to 60 DEG C Enter from 3 lower part of absorption tower in absorption tower 3, absorption tower is divided into upper column and lower tower.Upper and lower tower bottom is respectively arranged with packing support plate Plate, filler (stainless steel rectangular saddle ring) are placed on support plate in a manner of huddling.The top installation hold-down grid of filler, to prevent upper Air-flow is risen to blow.The organic solvent fluid of cleaning of off-gas pumps the 5, second heat exchanger 42 (plate heat exchanger), warp by organic solvent Spray tube spray is crossed to filler, and is flowed down along filler surface, is exported by absorption tower lower tower, a part of organic solvent circulation Use, after another part organic solvent organic solvent pump 5 gets to 6 decolorization of bleaching tower, stored with storage tank 7.Tail gas after Continuous to rise, when rising to upper column, the recirculated water of cleaning of off-gas passes through water pump 10,41 (plate-type heat-exchange of First Heat Exchanger Device) sprayed again by spray tube onto filler, and flowed down along filler surface, the outlet inflow cyclic water tank 11 through upper column, one Part organic solvent recycling, most of water is for recycling.Gas is sent into from bottom of towe in absorption tower 3, is distributed and is filled through gas After putting distribution, the gap of packing layer is continued through in adverse current with liquid, in filler layer surface, gas-liquid two-phase close contact carries out Mass transfer.In view of when liquid flows downward along packing layer, it sometimes appear that wall flow phenomenon, three sections of packing layer point in absorption tower Arrangement, apparatus for redistributing is set among tower, and spray is useless to maximizing on lower floor's filler absorbing surface to reach absorption after redistribution The purpose of gas.After above-mentioned processing, tail gas ultimately becomes clean gas and is discharged at the top of absorption tower, passes through wind turbine 8, chimney 9 Qualified discharge.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The most wide scope consistent with features of novelty.

Claims (10)

1. a kind of steel drum application fume afterheat and solvent recovery unit, it is characterised in that including gas-gas heat exchanger, gas-liquid heat exchange Device, absorption tower, bleaching tower and storage tank;The exhanst gas outlet of the gas-gas heat exchanger and the gas inlet of the gas-liquid heat-exchange connect Logical, the exhanst gas outlet of the gas-liquid heat-exchange is connected with the gas inlet on the absorption tower, and the exhanst gas outlet on the absorption tower is used Connected in chimney, recycling design outlet and the inlet communication of the bleaching tower, the outlet of the bleaching tower on the absorption tower With the inlet communication of the storage tank.
2. steel drum application fume afterheat according to claim 1 and solvent recovery unit, it is characterised in that the gas gas changes Hot device is heat pipe-type air preheater, and the gas-liquid heat-exchange is fin-tube heat exchanger.
3. steel drum application fume afterheat according to claim 1 and solvent recovery unit, it is characterised in that the gas gas changes The heat outlet of hot device is used to be connected with combustion chamber.
4. according to claim 1-3 any one of them steel drum application fume afterheat and solvent recovery unit, it is characterised in that institute State absorption tower and be both provided with spray tube with the lower tower for classification absorption tower, including upper column and lower tower, the upper column.
5. steel drum application fume afterheat according to claim 4 and solvent recovery unit, it is characterised in that the upper column Outlet and cyclic water tank inlet communication, the water outlet of the cyclic water tank passes through water pump and the spray tube of the upper column connects It is logical.
6. steel drum application fume afterheat according to claim 5 and solvent recovery unit, it is characterised in that the water pump with First Heat Exchanger is connected between the upper column.
7. steel drum application fume afterheat according to claim 6 and solvent recovery unit, it is characterised in that described first changes Hot device is plate heat exchanger.
8. steel drum application fume afterheat according to claim 4 and solvent recovery unit, it is characterised in that the lower tower Outlet and organic solvent pump connect, the organic solvent pump export respectively with the bleacher and the spray of the lower tower Pipe connects.
9. steel drum application fume afterheat according to claim 8 and solvent recovery unit, it is characterised in that described organic molten Agent is pumped is connected with the second heat exchanger between the lower tower.
10. steel drum application fume afterheat according to claim 9 and solvent recovery unit, it is characterised in that described second Heat exchanger is plate heat exchanger.
CN201721254693.2U 2017-09-27 2017-09-27 A kind of steel drum application fume afterheat and solvent recovery unit Active CN207254046U (en)

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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
CN107569977A (en) * 2017-09-27 2018-01-12 株洲火炬工业炉有限责任公司 A kind of steel drum application fume afterheat and solvent recovery unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107569977A (en) * 2017-09-27 2018-01-12 株洲火炬工业炉有限责任公司 A kind of steel drum application fume afterheat and solvent recovery unit

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