CN116550111A - Water-based ink printing waste gas treatment recovery system - Google Patents
Water-based ink printing waste gas treatment recovery system Download PDFInfo
- Publication number
- CN116550111A CN116550111A CN202310675673.6A CN202310675673A CN116550111A CN 116550111 A CN116550111 A CN 116550111A CN 202310675673 A CN202310675673 A CN 202310675673A CN 116550111 A CN116550111 A CN 116550111A
- Authority
- CN
- China
- Prior art keywords
- water tank
- condenser
- waste gas
- heat exchanger
- drying box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000002912 waste gas Substances 0.000 title claims abstract description 53
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000007639 printing Methods 0.000 title claims abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000001035 drying Methods 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 37
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000036541 health Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000012298 atmosphere Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- 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
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a waste gas treatment and recovery system for water-based ink printing, which mainly comprises a drying box, a condenser, a spray tower, a water tank, a filter and a fin heat exchanger, wherein an air outlet of the drying box is respectively connected with the condenser and the spray tower; the hot air exhausted from the air outlet of the condenser flows back to the drying box to be heated and dried, the liquid outlet of the condenser is connected with the water tank, the liquid outlet of the fin heat exchanger is connected with the water tank, the hot air exhausted from the air outlet of the fin heat exchanger flows back to the drying box to be heated and dried, and the water tank is connected with a filter for filtering liquid discharge impurities of the water tank. The invention solves the problem that alcohol is difficult to recycle, fully recycles or utilizes the heat and alcohol in the waste gas, and has the advantages of health, emission reduction, safety, reliability, environmental protection and energy saving.
Description
Technical Field
The invention relates to the technical field of printing ink drying equipment, in particular to a waste gas treatment and recovery system for water-based ink printing.
Background
Ink is an important material for printing and is represented on a substrate by printing or spraying pattern words. The ink contains various types, wherein the water-based ink not only meets the environmental protection requirement, but also can obviously reduce the emission of organic volatile matters to the atmosphere, but has a slow drying speed compared with oily ink, the ink on the surface of a workpiece is required to be dried by using a drying box during printing, fresh air is supplied into the drying box and ethanol is added as a solvent, the generated waste gas is required to be introduced into a condenser to liquefy and collect the ethanol contained in the waste gas, and the waste gas is discharged or circularly reflowed to the inside of the drying box to heat and dry the product after being condensed and dehumidified. Because the alcohol condensation recovery temperature is related to the alcohol concentration, the lower the alcohol concentration is, the lower the liquefaction temperature is required, so that the alcohol recovery is difficult when the alcohol content in the waste gas is lower, and the alcohol escapes from the drying box after long-term use, so that the workshop has pungent smell, and the operation feeling of workers is influenced; alcohol in the waste gas is not easy to recover, the requirement of the tail gas emission is difficult to be met, and the problem of the tail gas emission exists; with the gradual rise of alcohol concentration in equipment pipeline internal circulation drying equipment of waste gas, easy explosion appears the incident, has great security risk.
Disclosure of Invention
The invention aims to provide a water-based ink printing waste gas treatment and recovery system which can solve the technical problem that alcohol in waste gas of a water-based ink drying box is difficult to recover at present.
The invention provides the following technical scheme: the waste gas treatment and recovery system for the water-based ink printing mainly comprises a drying box, a condenser, a spray tower, a water tank, a filter and a fin heat exchanger, wherein an air outlet of the drying box is respectively connected with the condenser and the spray tower and is used for leading waste gas to the condenser and the spray tower; the hot air exhausted from the air outlet of the condenser flows back to the drying box for heating and drying, the liquid outlet of the condenser is connected with the water tank, a fin liquid supply pump for supplying liquid to the fin heat exchanger is arranged between the water tank and the fin heat exchanger, the liquid outlet of the fin heat exchanger is connected with the water tank, the fan for supplying air to the fin heat exchanger is connected to the outside of the fin heat exchanger, the hot air exhausted from the air outlet of the fin heat exchanger flows back to the drying box for heating and drying, the water tank is connected with a filter for filtering liquid discharged impurities of the water tank, a liquid discharge valve is arranged on a connecting pipe between the water tank and the filter, and an alcohol concentration detector and a liquid level sensor are arranged inside the water tank.
Further, the drying box is connected with the condenser and the spray tower through two waste gas branches, and waste gas flow valves are respectively arranged on the two waste gas branches.
The beneficial effects are that: the working process of the water-based ink printing waste gas treatment and recovery system is as follows: part of waste gas containing ethanol and water generated by the drying box is sent into a condenser to be condensed and dehumidified, the other part of the waste gas is sent into a spray tower to be sprayed, the ethanol and water vapor in the waste gas are liquefied into condensate containing ethanol under the low temperature effect in the condenser and are collected into a water tank, and the ethanol in the waste gas is dissolved by water in the spray tower and is collected into the water tank; the alcohol solution in the water tank is continuously pumped to the spray tower and circularly flows back to the water tank, the alcohol concentration is gradually increased, the liquid discharge valve is opened when the alcohol concentration is increased to a certain concentration, impurities are removed after the alcohol solution is filtered, the alcohol solution can be directly discharged or recovered later to be used as a solvent of the drying box, the waste gas is effectively removed of the alcohol and is discharged to the outside through the air outlet of the spray tower, the waste gas is directly discharged to the atmosphere when the temperature is higher in summer, and the waste gas is led to a workshop when the temperature is lower in winter, so that the problem of workshop heating is solved by using waste gas waste heat; based on the fact that the alcohol solution absorbs waste gas heat in the spraying process, the waste gas in the condenser releases heat in the liquefying process and is absorbed by condensate, the alcohol solution in the water tank is sent into the fin heat exchanger to exchange heat with workshop air, and the workshop air absorbs the alcohol solution heat and is sent into the drying box to be dried;
according to the invention, the heat and alcohol of waste gas generated by printing and drying are effectively absorbed and utilized, alcohol in the waste gas is circularly sprayed and absorbed through the spray tower, alcohol extraction rate is improved through dissolving alcohol in a spraying mode, the water tank repeatedly circularly sprays the waste gas for many times, and filtering and recovering or discharging are performed after the alcohol concentration is improved, so that the problem of alcohol recovery is skillfully solved. Therefore, the invention can solve the exhaust emission problem, realize the aim of reaching emission standard, is beneficial to ensuring the health of staff, avoids bad smell caused by the escape of alcohol in workshops, ensures the production safety of workshops, reduces the safety risk, fully utilizes the heat of the exhaust gas, and has the effects of environmental protection and energy saving.
Drawings
FIG. 1 is a schematic process flow diagram of a specific example 1 of an aqueous ink printing exhaust treatment recovery system of the present invention;
reference numerals: 1-a drying box; a 2-condenser; 3-a spray tower; 4-a pool; 5-a filter; 6-fin heat exchanger; 8-spraying a liquid supply pump; 9-fin liquid supply pump; 11-a fan; 12-an atmospheric exhaust valve; 13, a workshop exhaust valve; 14-drain valve.
Description of the embodiments
The present invention will be described in detail with reference to the accompanying drawings.
The specific embodiment 1 of the waste gas treatment and recovery system for water-based ink printing of the invention comprises the following components:
the water-based ink printing waste gas treatment recovery system is shown in fig. 1, and mainly comprises a drying box 1, a condenser 2, a spray tower 3, a water tank 4, a filter 5 and a fin heat exchanger 6, wherein the drying box 1 is used for drying ink on the surface of a workpiece, fresh air is required to be supplied into the drying box and ethanol (alcohol) solvent is required to be added during use, and waste gas generated in the drying operation process contains water vapor and alcohol. The air outlet of the drying box 1 is respectively connected with the condenser 2 and the spray tower 3 through two waste gas branches, and waste gas generated by drying is split into the condenser 2 and the spray tower 3 for recovery treatment. The condenser 2 condenses the dehumidification through low temperature condensing agent to waste gas, and moisture, alcohol in the waste gas meet cold liquefaction and become the condensate, and condenser 2 liquid outlet is connected with water tank 4, and inside the condensate that produces was sent into water tank 4, condenser 2 air outlet and stoving case 1 are connected, and the surplus hot-blast stoving case heating of being supplied with is carried out to the waste gas condensation.
The spray tower 3 is in circulating connection with the water tank 4, a spray liquid supply pump 8 is arranged between a liquid inlet of the spray tower 3 and the water tank 4, the spray liquid supply pump 8 is used for pumping spray liquid to the spray tower 3, and a liquid outlet of the spray tower is connected with the water tank 4. The waste gas enters the spray tower 3 to fully contact with the spray liquid, and the spray liquid flows into the water tank 4 through the liquid outlet of the spray tower after dissolving alcohol and is collected as alcohol solution. The alcohol concentration in the water tank is gradually increased by continuously repeating the spraying and dissolving circulation process, the filter 5 is further connected to the rear end of the water tank 4, the liquid discharge valve 14 for controlling water discharge of the water tank is arranged on a connecting pipe between the water tank 4 and the filter 5, the alcohol concentration detector and the liquid level sensor are arranged in the water tank 4, the alcohol solution is discharged by opening the liquid discharge valve 14 when the concentration of the alcohol solution is increased to a certain value, impurities in the alcohol solution are filtered by the filter 5 and are directly discharged or recycled for the drying box, and when the liquid level in the water tank is reduced to a certain value, water is supplied to the water tank through an external water source.
The waste gas also contains certain heat after alcohol is removed by the spray tower 3, the air outlet of the spray tower 3 is connected with two exhaust branches which are respectively communicated with the atmosphere and a workshop, exhaust valves are arranged on the exhaust branches, and each exhaust valve comprises an atmosphere exhaust valve 12 for controlling the gas to be communicated with the atmosphere and a workshop exhaust valve 13 for controlling the gas to be discharged to the workshop. Because the waste gas has got rid of alcohol, accords with the emission requirement, under the higher condition of summer temperature, open atmospheric vent valve 12, close workshop discharge valve 13, will be handled waste gas direct emission, under the lower condition of winter temperature, close atmospheric vent valve 12, open workshop discharge valve 13, will get rid of the gas supply workshop of alcohol and supply the workshop in and heat, not only can solve workshop heating problem, can also make full use of waste gas waste heat, reaches energy saving and emission reduction's effect.
A fin liquid supply pump 9 is arranged between the liquid inlet of the fin heat exchanger 6 and the water tank 4, the fin liquid supply pump 9 can pump the alcohol solution in the water tank 4 to the fin heat exchanger 6, and the liquid outlet of the fin heat exchanger 6 is connected with the water tank 4 and used for circulating reflux; a fan 11 for supplying workshop air to the fin heat exchanger 6 is arranged outside the air inlet of the fin heat exchanger 6, and the air outlet of the fin heat exchanger 6 is connected with the drying box 1. The workshop air absorbs the heat of the alcohol solution and then is sent into the drying box 1 for heating and drying, in the process, the workshop air absorbs the heat of the alcohol solution and is used for drying operation, and the residual heat of the alcohol solution is fully utilized, so that the heat utilization efficiency is improved.
In this embodiment, exhaust gas flow valves are respectively arranged on two exhaust gas branches connected with the drying box, the flow ratio of the exhaust gas flow valves to the condenser 2 and the spray tower 3 is changed by adjusting the exhaust gas flow valves, and in the actual use process, operators can set valves on all connecting pipes as required, and the valves are connected and controlled through a controller to collect production parameters, so that automatic production is realized.
According to the water-based ink printing waste gas treatment recovery system, waste gas is respectively introduced into the spray tower and the condenser, the extraction rate of alcohol is improved through the spray effect and the liquefaction reaction, the waste gas is repeatedly and circularly sprayed from the water tank until the concentration of the alcohol is improved, and then the waste gas is filtered and recovered or discharged, so that the alcohol contained in the waste gas can be thoroughly removed, the problems of alcohol recovery and waste gas discharge are solved, the aim of reaching the standard discharge is fulfilled, the health of staff is guaranteed, the production safety is guaranteed, and the occurrence probability of safety accidents is reduced. The fin heat exchanger is arranged for heat exchange, and the exhaust branch is arranged at the air outlet of the spray tower, so that the exhaust emission mode can be adjusted according to the seasonal condition, the exhaust is used for heating a workshop in winter after alcohol is removed, and the workshop air absorbs the heat of the alcohol solution and then is led into the drying box for drying and heating, so that the heat is fully utilized, and the heat utilization rate is improved; therefore, the method has the remarkable advantages of high safety coefficient, energy conservation and emission reduction, personnel health assurance and alcohol recovery utilization rate improvement.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (2)
1. The water-based ink printing waste gas treatment and recovery system is characterized by mainly comprising a drying box, a condenser, a spray tower, a water tank, a filter and a fin heat exchanger, wherein an air outlet of the drying box is respectively connected with the condenser and the spray tower and is used for leading waste gas to the condenser and the spray tower; the hot air exhausted from the air outlet of the condenser flows back to the drying box for heating and drying, the liquid outlet of the condenser is connected with the water tank, a fin liquid supply pump for supplying liquid to the fin heat exchanger is arranged between the water tank and the fin heat exchanger, the liquid outlet of the fin heat exchanger is connected with the water tank, the fan for supplying air to the fin heat exchanger is connected to the outside of the fin heat exchanger, the hot air exhausted from the air outlet of the fin heat exchanger flows back to the drying box for heating and drying, the water tank is connected with a filter for filtering liquid discharged impurities of the water tank, a liquid discharge valve is arranged on a connecting pipe between the water tank and the filter, and an alcohol concentration detector and a liquid level sensor are arranged inside the water tank.
2. The system of claim 1, wherein the drying box is connected to the condenser and the spray tower through two exhaust branches, and exhaust gas flow valves are respectively disposed on the two exhaust branches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310675673.6A CN116550111A (en) | 2023-06-08 | 2023-06-08 | Water-based ink printing waste gas treatment recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310675673.6A CN116550111A (en) | 2023-06-08 | 2023-06-08 | Water-based ink printing waste gas treatment recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116550111A true CN116550111A (en) | 2023-08-08 |
Family
ID=87498306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310675673.6A Pending CN116550111A (en) | 2023-06-08 | 2023-06-08 | Water-based ink printing waste gas treatment recovery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN116550111A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030079797A (en) * | 2002-04-04 | 2003-10-10 | 마츠시타 칸쿄쿠쵸 엔지니어링 가부시키가이샤 | Method and apparatus for treating organic exhaust gas |
| CN107398145A (en) * | 2017-07-25 | 2017-11-28 | 魏毅培 | A kind of ethanol recovery of water-based ink printing baking oven and VOC emission-reducing systems and method |
| CN206924601U (en) * | 2017-06-28 | 2018-01-26 | 魏毅培 | A kind of air-liquid circulating system of water-based ink printing baking oven |
| CN110027317A (en) * | 2019-05-06 | 2019-07-19 | 魏毅培 | Aqueous ink print air circulation system and VOC discharge-reducing method |
| CN214345365U (en) * | 2021-01-29 | 2021-10-08 | 德兴市龙兴钙业有限公司 | Hot air utilization device for boiler tail gas |
-
2023
- 2023-06-08 CN CN202310675673.6A patent/CN116550111A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030079797A (en) * | 2002-04-04 | 2003-10-10 | 마츠시타 칸쿄쿠쵸 엔지니어링 가부시키가이샤 | Method and apparatus for treating organic exhaust gas |
| CN206924601U (en) * | 2017-06-28 | 2018-01-26 | 魏毅培 | A kind of air-liquid circulating system of water-based ink printing baking oven |
| CN107398145A (en) * | 2017-07-25 | 2017-11-28 | 魏毅培 | A kind of ethanol recovery of water-based ink printing baking oven and VOC emission-reducing systems and method |
| CN110027317A (en) * | 2019-05-06 | 2019-07-19 | 魏毅培 | Aqueous ink print air circulation system and VOC discharge-reducing method |
| CN214345365U (en) * | 2021-01-29 | 2021-10-08 | 德兴市龙兴钙业有限公司 | Hot air utilization device for boiler tail gas |
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