CN105109203A - Energy-saving environment-friendly method for recovering ink material - Google Patents
Energy-saving environment-friendly method for recovering ink material Download PDFInfo
- Publication number
- CN105109203A CN105109203A CN201510551976.2A CN201510551976A CN105109203A CN 105109203 A CN105109203 A CN 105109203A CN 201510551976 A CN201510551976 A CN 201510551976A CN 105109203 A CN105109203 A CN 105109203A
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- China
- Prior art keywords
- ink material
- sewage
- distillation column
- column body
- pipe
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- 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
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Ink Jet (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses an energy-saving environment-friendly method for recovering an ink material. The method comprises the following realizing steps that solvent sprayed out by a spraying device in a plate washing machine is used for flushing ink on a screen board, sewage generated after flushing flows into a sewage recovering tank and is guided into a heat pipe in a distillation column body through a first pipeline, after the sewage makes contact with the heat pipe, liquid in the sewage is evaporated and discharged into a condensation pipe, the ink material in the sewage is attached to the pipe until the ink material is dried, then forms powder and falls off to the bottom of the distillation column body to obtain the powdery ink material, an air blowing device blows the powdery ink material out, and a recovering barrel recovers the ink material; liquid steam in the condensation pipe is liquefied to obtain clean solvent, the clean solvent enters a circulating pool along the condensation pipe and flows back into the spraying device of the board washing machine through a second pipeline to be reutilized. According to the method, the ink material and the solvent can be recovered, pollution to environment is greatly reduced, and resources are saved greatly.
Description
Technical field
The divisional application that the present invention is the patent No. is ZL201310309444.9, name is called the patent of invention of " a kind of system of recovered oil ink material ", relates to a kind of method, especially a kind of method of recovered oil ink material.
Background technology
Washing trigger is a kind of machine for cleaning web plate.Solvent is sprayed onto on web plate by the spray equipment washed in trigger, rinses the ink on web plate.Existingly wash trigger solvent and wash outside trigger rinsing general just directly discharge of the sewage produced after web plate, the pollution of environment will be caused like this, and solvent is expensive, also causes the wasting of resources.
No. 201220614939.3, Chinese patent discloses a kind of screen printing net plate automatic cyclic cleaning machine, wash the circulation utilization method of plate liquid (i.e. solvent described in this patent) in this web plate automatic cyclic cleaning machine: be about to rinse the sewage after web plate by filter, reclaim obtain cleaning wash plate liquid, thus realize washing recycling of plate liquid.But, in this patent, the ink material after filtration is not but recycled, cause the loss and waste of ink material.
In view of this, the present inventor furthers investigate the problems referred to above, then produces in this case.
Summary of the invention
The object of the invention is to provide a kind of method of energy saving and environment friendly recovered oil ink material, do not recycle to overcome ink material in prior art, cause the problem of the wasting of resources, and have solvent is reclaimed, greatly reduce the pollution of environment and greatly saved the advantage of resource.
In order to reach above-mentioned purpose, solution of the present invention is:
A method for energy saving and environment friendly recovered oil ink material, realizes as follows:
One, rinse: rinsed the ink on web plate by the spray equipment ejection solvent washed in trigger, the sewage after flushing flows in sewage accumulator tank;
Two, evaporate: the sewage in step one in sewage accumulator tank is introduced on the heat pipe in distillation column body by the first liquid feeding pump in the first pipeline through the first way, after waste water to heat pipe, namely liquid in sewage carry out evaporating and being drained in condenser pipe by the leakage fluid dram above distillation column body, and the ink material in sewage is attached on heat pipe;
Three, dry, liquefaction: the ink material of step 2 is dried through the heat of heat pipe, is formed Powdered and drops to the bottom of distillation column body, obtaining powdery ink material after drying; Meanwhile, the liquid vapour in the condenser pipe of step 2 obtains clean solvent through post liquefaction, and this clean solvent enters in circulating pool along condenser pipe;
Four, reclaim: by air-blast device by outside the discharging opening below the powdery ink material of step 3 gained blowout distillation column body, and reclaim this ink material by the recycling bin under this discharging opening; Meanwhile, the solvent in the circulating pool of step 3 is re-used in the spray equipment washing trigger that second pipe is back to step one by the second liquid feeding pump in second pipe.
In above-mentioned steps two, in the gondola water faucet on effluent stream to the first pipeline liquid outlet in the first pipeline, then be sprayed on heat pipe by a plurality of spray orifices on gondola water faucet.
The bottom of above-mentioned distillation column body is equiped with the reducing mechanism of the ink material for smashing caking, and this reducing mechanism comprises bit, rotating shaft and drives the rotary electric machine of this axis of rotation, and this bit is installed in this rotating shaft.
In above-mentioned steps four, if when the ink material bottom distillation column body has a caking, start the ink material of reducing mechanism to caking and pulverize.
After adopting technique scheme, tool of the present invention has the following advantages: the sewage rinsed after web plate is introduced in distillation column body by the first pipeline by the present invention, sewage in first pipeline is sprayed onto on the heat pipe in distillation column body, after waste water to this heat pipe, namely the liquid in sewage evaporate, and the ink material in sewage is attached on heat pipe, when ink material becomes dry powdered, namely split away off by heat pipe, therefore, the present invention can realize the recovery of ink material; In addition, after the liquid that heat pipe of the present invention evaporates is discharged to condenser pipe by leakage fluid dram, form clean solvent, this solvent is got back to wash in trigger through circulating pool and second pipe and is re-used; Then the present invention not only recyclable ink material but also solvent-recoverable greatly reduce the pollution of environment, also greatly saved resource simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of broken section structural representation of system of recovered oil ink material.
In figure:
Wash trigger 1 sewage accumulator tank 11
Distilling apparatus 2 distillation column body 3
Leakage fluid dram 31 discharging opening 32
Recycling bin 33 heat pipe 4
First pipeline 5 liquid outlet 52
Gondola water faucet 53 spray orifice 54
Air-blast device 6 air channel 61
Fan leaf group 62 drive motors 63
Reducing mechanism 7 bit 71
Rotating shaft 72 rotary electric machine 73
Condenser pipe 8 circulating pool 81
Second pipe 9
Detailed description of the invention
The system of a kind of energy saving and environment friendly recovered oil ink material of the present invention, as shown in Figure 1, comprises and washes trigger 1 and distilling apparatus 2, wash trigger 1 and be provided with sewage accumulator tank 11, and this sewage accumulator tank 11 is for collecting the sewage after rinsing web plate; Distilling apparatus 2 comprises distillation column body 3, is equiped with the heat pipe 4 for making liquid evaporate in this distillation column body 3, and this heat pipe 4 can be the pipeline passing into deep fat; Sewage accumulator tank 11 is connected by the first pipeline 5 with distillation column body 3, is equiped with the first liquid feeding pump (not shown) in the first pipeline 5; The liquid outlet 52 of the first pipeline 5 is connected with a gondola water faucet 53, and this gondola water faucet 53 is provided with a plurality of spray orifices 54, and a plurality of spray orifices 54 is arranged towards heat pipe 4 ground; By arranging gondola water faucet 53, sewage can be sprayed on heat pipe 4 more equably, and the sewage of the first pipeline 5 can be avoided towards a local sprinkling of heat pipe 4, and cause current excessive, the sewage on heat pipe 4 has little time evaporation and flows to bottom distillation column body 3.
As shown in Figure 1, the top of the madial wall of distillation column body 3 is provided with the leakage fluid dram 31 that distillate is volatilized away, and the below of the madial wall of distillation column body is provided with the discharging opening 32 for discharging ink material; The below of this heat pipe be provided with for reclaim tube surface come off under the material recuperating machines of ink material; This material recuperating machines is a recycling bin 33, and this recycling bin 33 docks with this discharging opening 32.
This distilling apparatus 2 also comprises air-blast device 6, the drive motors 63 that this air-blast device 6 comprises air channel 61, fan leaf group 62 and drives this fan leaf group 62 to rotate, and this fan leaf group 62 is installed in air channel 61.The air outlet in air channel 61 is communicated with distillation column body 3, and the air outlet in this air channel 61 is arranged towards discharging opening 32 ground, and like this, the ink material powder dropped on bottom distillation column body 3 just can be blowed to discharging opening 32 by air-blast device 6.Because ink material is by after heat pipe comes off, overstocks in the bottom of distillation column body 3 and may form caking, bottom distillation column body 3, being equiped with the reducing mechanism 7 of the ink material for smashing caking; The rotary electric machine 73 that this reducing mechanism 7 comprises bit 71, rotating shaft 72 and drives this rotating shaft 72 to rotate, this bit 71 is installed in this rotating shaft 72.
As shown in Figure 1, the system of recovered oil ink material also comprises condenser pipe 8 and circulating pool 81, this condenser pipe 8 is in arranging obliquely, the upper end of this condenser pipe 8 is connected with leakage fluid dram 31, the lower end of this condenser pipe 8 is connected with circulating pool 81, circulating pool 81 with wash trigger 1 and be connected by second pipe 9, be provided with the second liquid feeding pump (not shown) in this second pipe 9.
As shown in Figure 1, specific works process of the present invention is as follows: the spray equipment ejection solvent washed in trigger rinses the ink on web plate, sewage after flushing flows in sewage accumulator tank 11, under the first liquid feeding pump effect in the first pipeline 5, sewage is by flowing in gondola water faucet 53 through the first pipeline 5 in sewage accumulator tank 11, be sprayed onto on heat pipe 4 by a plurality of spray orifices 54 on gondola water faucet 53 again, after sewage is sprayed onto heat pipe 4, liquid in sewage is evaporated and is discharged in condenser pipe 8 by leakage fluid dram, liquid vapour in this condenser pipe 8 forms clean solvent through post liquefaction, and this clean solvent enters in circulating pool 81 along condenser pipe 8, solvent in this circulating pool 81 is by coming back in the spray equipment washed in trigger 1 under the second liquid feeding pump effect in second pipe 9, and the ink material in sewage is attached on heat pipe 4, until after the oven dry of this ink material, form the bottom of shed powder to distillation column body 3, air-blast device is by the ink material powder blowout discharging opening 32 bottom distillation column body 3, and the recycling bin 33 under this discharging opening 32 reclaims this ink material.When ink material bottom distillation column body 3 has a phenomenon of caking, can start reducing mechanism 7, the bit 71 of reducing mechanism 7 can be pulverized the ink material of this caking.
As shown in Figure 1, the sewage after flushing web plate is sprayed onto on heat pipe 4 by the present invention, the ink material in sewage, be attached on heat pipe 4, when ink material be dried into Powdered after, namely this ink material splits away off by heat pipe 4, therefore, the present invention can realize the recovery of ink material.In addition, the liquid that heat pipe 4 of the present invention evaporates forms clean solvent after being discharged to condenser pipe 8 by leakage fluid dram 31, and this solvent is got back to wash in trigger 1 and re-used.The present invention not only recyclable ink material but also solvent-recoverable greatly reduces the pollution of environment, has also greatly saved resource simultaneously.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (4)
1. a method for energy saving and environment friendly recovered oil ink material, is characterized in that, realizes as follows:
One, rinse: rinsed the ink on web plate by the spray equipment ejection solvent washed in trigger, the sewage after flushing flows in sewage accumulator tank;
Two, evaporate: the sewage in step one in sewage accumulator tank is introduced on the heat pipe in distillation column body by the first liquid feeding pump in the first pipeline through the first way, after waste water to heat pipe, namely liquid in sewage carry out evaporating and being drained in condenser pipe by the leakage fluid dram above distillation column body, and the ink material in sewage is attached on heat pipe;
Three, dry, liquefaction: the ink material of step 2 is dried through the heat of heat pipe, is formed Powdered and drops to the bottom of distillation column body, obtaining powdery ink material after drying; Meanwhile, the liquid vapour in the condenser pipe of step 2 obtains clean solvent through post liquefaction, and this clean solvent enters in circulating pool along condenser pipe;
Four, reclaim: by air-blast device by outside the discharging opening below the powdery ink material of step 3 gained blowout distillation column body, and reclaim this ink material by the recycling bin under this discharging opening; Meanwhile, the solvent in the circulating pool of step 3 is re-used in the spray equipment washing trigger that second pipe is back to step one by the second liquid feeding pump in second pipe.
2. the method for a kind of energy saving and environment friendly recovered oil ink material according to claim 1, it is characterized in that: in above-mentioned steps two, in gondola water faucet on effluent stream to the first pipeline liquid outlet in first pipeline, then be sprayed on heat pipe by a plurality of spray orifices on gondola water faucet.
3. the method for a kind of energy saving and environment friendly recovered oil ink material according to claim 1, it is characterized in that: the bottom of above-mentioned distillation column body is equiped with the reducing mechanism of the ink material for smashing caking, this reducing mechanism comprises bit, rotating shaft and drives the rotary electric machine of this axis of rotation, and this bit is installed in this rotating shaft.
4. the method for a kind of energy saving and environment friendly recovered oil ink material according to claim 3, is characterized in that: in above-mentioned steps four, if when the ink material bottom distillation column body has a caking, starts the ink material of reducing mechanism to caking and pulverizes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510551976.2A CN105109203B (en) | 2013-07-23 | 2013-07-23 | A kind of energy saving and environment friendly method for reclaiming ink material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510551976.2A CN105109203B (en) | 2013-07-23 | 2013-07-23 | A kind of energy saving and environment friendly method for reclaiming ink material |
CN201310309444.9A CN103342049B (en) | 2013-07-23 | 2013-07-23 | A kind of system of recovered oil ink material |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201310309444.9A Division CN103342049B (en) | 2013-07-23 | 2013-07-23 | A kind of system of recovered oil ink material |
Publications (2)
Publication Number | Publication Date |
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CN105109203A true CN105109203A (en) | 2015-12-02 |
CN105109203B CN105109203B (en) | 2017-10-03 |
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Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
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CN201510551976.2A Expired - Fee Related CN105109203B (en) | 2013-07-23 | 2013-07-23 | A kind of energy saving and environment friendly method for reclaiming ink material |
CN201310309444.9A Expired - Fee Related CN103342049B (en) | 2013-07-23 | 2013-07-23 | A kind of system of recovered oil ink material |
CN201510555214.XA Expired - Fee Related CN105034592B (en) | 2013-07-23 | 2013-07-23 | Energy-saving and environment-friendly system for printing ink material recovery |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
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CN201310309444.9A Expired - Fee Related CN103342049B (en) | 2013-07-23 | 2013-07-23 | A kind of system of recovered oil ink material |
CN201510555214.XA Expired - Fee Related CN105034592B (en) | 2013-07-23 | 2013-07-23 | Energy-saving and environment-friendly system for printing ink material recovery |
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CN (3) | CN105109203B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108802309A (en) * | 2018-08-14 | 2018-11-13 | 南京融康博生物科技有限公司 | A kind of leukemia drug susceptibility detector |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106313889B (en) * | 2016-08-22 | 2018-07-13 | 厦门通利彩印有限公司 | A kind of printing machine automatically supplying ink system |
CN107718877A (en) * | 2017-12-06 | 2018-02-23 | 张斐斐 | A kind of ink in printing press retracting device |
CN109516516B (en) * | 2018-10-31 | 2021-07-06 | 东莞市佐川油墨科技有限公司 | Energy-saving and environment-friendly device for recovering ink materials |
CN109319864B (en) * | 2018-10-31 | 2021-04-30 | 安徽永桦包装有限公司 | Energy-saving and environment-friendly system for recovering printing ink materials |
CN113459681A (en) | 2021-06-29 | 2021-10-01 | Tcl华星光电技术有限公司 | Ink jet printing apparatus |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09156082A (en) * | 1995-12-07 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Method and apparatus for recovering solvent from washing waste solution of printing press |
CN1223969A (en) * | 1997-12-31 | 1999-07-28 | 吉奥里大街公司 | Process for producing fresh wiping solution and for treating used wiping solution and apparatus for carrying out the process |
CN200981064Y (en) * | 2006-11-30 | 2007-11-28 | 张家港联亿电子有限公司 | Sealed type automatic cleaning machine |
KR100854089B1 (en) * | 2007-12-11 | 2008-08-25 | 주식회사 영산테크노 | A vacuum vaporization recycling apparatus for waste water |
CN201886281U (en) * | 2010-12-01 | 2011-06-29 | 郑州华英包装有限公司 | Self-circulation type version washing machine |
CN202643357U (en) * | 2012-06-12 | 2013-01-02 | 成都蜀都纳米材料科技发展有限公司 | Electrothermal waste water distillation device |
CN202782170U (en) * | 2012-07-24 | 2013-03-13 | 深圳市科发机械制造有限公司 | Printing ink cleaning device by means of spraying |
CN202878903U (en) * | 2012-11-19 | 2013-04-17 | 黑金刚(泉州)数控科技有限公司 | Automatically circulating washer for silk-screen printing screen |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008279368A (en) * | 2007-05-10 | 2008-11-20 | Omega:Kk | Mechanism and method of treating waste water |
JP2011067786A (en) * | 2009-09-28 | 2011-04-07 | Hiroaki Mochizuki | Method for treating harmful substance-containing waste liquid |
JP2012161770A (en) * | 2011-02-09 | 2012-08-30 | Takuko Kaku | Means for disposing waste liquid and method for disposing and recovering waste liquid |
CN203344491U (en) * | 2013-07-23 | 2013-12-18 | 黑金刚(福建)自动化科技股份公司 | System for recovering printing ink material |
-
2013
- 2013-07-23 CN CN201510551976.2A patent/CN105109203B/en not_active Expired - Fee Related
- 2013-07-23 CN CN201310309444.9A patent/CN103342049B/en not_active Expired - Fee Related
- 2013-07-23 CN CN201510555214.XA patent/CN105034592B/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09156082A (en) * | 1995-12-07 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Method and apparatus for recovering solvent from washing waste solution of printing press |
CN1223969A (en) * | 1997-12-31 | 1999-07-28 | 吉奥里大街公司 | Process for producing fresh wiping solution and for treating used wiping solution and apparatus for carrying out the process |
CN200981064Y (en) * | 2006-11-30 | 2007-11-28 | 张家港联亿电子有限公司 | Sealed type automatic cleaning machine |
KR100854089B1 (en) * | 2007-12-11 | 2008-08-25 | 주식회사 영산테크노 | A vacuum vaporization recycling apparatus for waste water |
CN201886281U (en) * | 2010-12-01 | 2011-06-29 | 郑州华英包装有限公司 | Self-circulation type version washing machine |
CN202643357U (en) * | 2012-06-12 | 2013-01-02 | 成都蜀都纳米材料科技发展有限公司 | Electrothermal waste water distillation device |
CN202782170U (en) * | 2012-07-24 | 2013-03-13 | 深圳市科发机械制造有限公司 | Printing ink cleaning device by means of spraying |
CN202878903U (en) * | 2012-11-19 | 2013-04-17 | 黑金刚(泉州)数控科技有限公司 | Automatically circulating washer for silk-screen printing screen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108802309A (en) * | 2018-08-14 | 2018-11-13 | 南京融康博生物科技有限公司 | A kind of leukemia drug susceptibility detector |
Also Published As
Publication number | Publication date |
---|---|
CN105109203B (en) | 2017-10-03 |
CN105034592B (en) | 2017-05-17 |
CN103342049B (en) | 2015-08-05 |
CN105034592A (en) | 2015-11-11 |
CN103342049A (en) | 2013-10-09 |
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