CN112590384A - Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment - Google Patents
Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment Download PDFInfo
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- CN112590384A CN112590384A CN202011423758.8A CN202011423758A CN112590384A CN 112590384 A CN112590384 A CN 112590384A CN 202011423758 A CN202011423758 A CN 202011423758A CN 112590384 A CN112590384 A CN 112590384A
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- 238000001035 drying Methods 0.000 title claims abstract description 36
- 239000002904 solvent Substances 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 3
- 239000012855 volatile organic compound Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0403—Drying webs
- B41F23/0423—Drying webs by convection
- B41F23/0426—Drying webs by convection using heated air
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a solvent drying energy-saving emission-reducing drying system of large-scale printing equipment, which comprises a large gas collecting chamber, a small gas collecting chamber, at least one group of drying ovens, a preheating assembly, a negative pressure sensor, a micro negative pressure sensor, a combustion chamber and a fan, wherein the large gas collecting chamber is arranged on the large gas collecting chamber; the design that air exhaust at the bottom of the box baking machine unit is directly connected with a main air collecting chamber is cancelled, a small air collecting chamber is added, polluted mixed air generated among all the units is collected together and conveyed into a main air exhaust pipeline after passing through a preheating assembly, the emission of high-temperature gas in the baking oven is reduced, the high-temperature gas with the concentration within a reasonable range is made to participate in the gas circulation in the equipment, and the energy waste of a heating unit is reduced; simultaneously through adjusting air regulation valve and each position fan power for the inside little negative pressure that forms of oven, the oven is main to be gathered together the chamber and is formed the negative pressure, never lets the more convenient circulation that circulates of gas, this benefit for the induced draft.
Description
Technical Field
The invention relates to the flexible package printing industry, in particular to a solvent drying energy-saving emission-reducing drying system of large-scale printing equipment.
Background
In the existing flexible package printing industry, when the film printing speed is below 500m/min, the drying of the film is always one of the most core problems of the equipment, and in the process of film printing, the drying is effectively and quickly carried out, so that the overall printing effect and the overall printing speed can be greatly improved,
however, with the emergence of market requirements of energy saving and emission reduction and environmental protection concepts, in the drying process, how to save energy, reduce power waste, and how to effectively control and safely discharge polluted gas need to be considered.
In the existing market, most drying system adopts one to advance one and goes out the connected form, between drying equipment and printing machine oven promptly, main air inlet is a pipeline, the return air adopts a pipeline, air exhaust at the bottom of the unit of equipment, who has independent tail gas treatment pipeline, connect on main exhaust duct, through main exhaust fan, on the equipment, the gas collection that gives off is carried away, but this way, inevitable can produce the tail gas of airing exhaust at the bottom of the unit and do not pass through tail gas treatment, problem among the direct emission air. Simultaneously, at the in-process that carries out the inside little negative pressure adjustment of oven, all discharge at main exhaust fan in the market and increase the sensor, but because the increase of printing machine unit length, at the in-process that carries out control system regulation, there can be the delay of time difference, lead to the stoving effect to receive the influence, serious department more can cause the production of incident.
In addition, in the process of treating tail gas, an LEL control system on the market is only connected with a main exhaust pipeline by arranging a connecting pipeline at the bottom exhaust position among all units for saving cost, but is limited by the power and the air volume of a main exhaust fan, and only can suck a very small amount of air in the bottom exhaust extraction of the last units, so that the tail gas is discharged into a workshop to cause pollution and waste.
Disclosure of Invention
In order to overcome the defects, the invention provides a solvent drying energy-saving emission-reducing drying system of large-scale printing equipment, which adopts two gas collecting chambers and realizes the purposes of energy conservation and emission reduction through pressure regulation and the like.
The technical scheme adopted by the invention for realizing the purpose is as follows: a solvent drying energy-saving emission-reducing drying system of large-scale printing equipment comprises a large gas collecting chamber, a small gas collecting chamber, at least one group of drying ovens, a preheating assembly, a negative pressure sensor, a micro negative pressure sensor, a combustion chamber and a fan;
the air inlet of the oven is connected with a main air inlet circuit, the air outlet of the oven is connected with a main air return circuit, a fan, an electric heating unit and an air volume adjusting valve are arranged on the main air inlet circuit, the main air return circuit is divided into a first air return circuit and a second air return circuit, the first air return circuit is connected with the main air inlet circuit for recycling, and the second air return circuit is connected with a large air collection chamber; the air volume regulating valves are arranged on the air return circuit I and the air return circuit II; an air outlet at the bottom of the oven is connected with a small air collecting chamber;
a micro negative pressure sensor is arranged on a main air inlet circuit and a main air return circuit of the oven;
a VOCs concentration sensor, a temperature sensor, a humidity sensor and a negative pressure sensor are arranged in the large gas collection chamber;
and an air outlet of the small air collecting chamber is connected with the large air collecting chamber after being connected with the preheating assembly.
Furthermore, the preheating assembly is of a drawer type structure, one side of the preheating assembly is an air inlet end, the other side of the preheating assembly is an air outlet end, the middle of the preheating assembly is a heating unit, and an air inlet air quantity regulating valve is arranged on the air inlet end.
Further, the heating unit is an electric heating device, a water heating device, an oil heating device or an oil-electric combined heating device.
Furthermore, an air volume adjusting valve is arranged on an air outlet at the bottom of the oven.
Further, the large gas collecting chamber is connected with a combustion chamber.
The invention has the beneficial effects that: the design that air exhaust at the bottom of a box baking machine unit is directly connected with a main air collecting chamber is cancelled, a small air collecting chamber is added, polluted mixed air generated among all units is collected together, is regulated by an air volume regulating valve, is conveyed into an LEL preheating component, and is conveyed into a main air exhaust pipeline after passing through a preheating unit; reduce the inside high-temperature gas's of oven emission, let the high-temperature gas of concentration at reasonable within range, participate in the inside gas circulation of equipment, reduce heating element's energy waste, simultaneously through adjusting air regulation valve and each position fan power for the inside little negative pressure that forms of oven, the main collection chamber of oven forms the negative pressure, never lets the more convenient circulation of gas, this is the benefit of reducing the wind. Through the emission that reduces gas, make the inside gaseous pollutant of oven, can concentrate together, the RTO equipment because of tail gas treatment, need after gaseous inside gaseous pollutant gas concentration need reach certain concentration, just can ignite and carry out the combustion process, so effectual, quick increase concentration, just can let tail gas handle, more high-efficient, it is quick, here LEL equipment, it volatilizees to air exhaust through the end, reveal gas, through inside seal structure of oven, sealed units such as main collection chamber, holistic sealed environment has been formed, thereby guarantee all gases that have the pollution, can obtain effectual processing, guarantee all gaseous pollutants, can carry out effectual collection, effectual centralized processing.
Drawings
Fig. 1 is a system configuration diagram.
Fig. 2 is a structural view of a preheating assembly.
Detailed Description
The invention will be further illustrated with reference to specific examples.
As shown in fig. 1-2, a solvent drying energy-saving emission-reducing drying system of a large-scale printing device comprises a large gas collection chamber 6, a small gas collection chamber 10, 4 groups of drying ovens 15, a preheating assembly 1, a negative pressure sensor 8, a micro negative pressure sensor 14, a combustion chamber 9 and a fan 2;
the air inlet of each group of drying ovens 15 is connected with a main air inlet circuit 16, the air outlet is connected with a main air return circuit, the main air inlet circuit 16 is provided with a fan 2, an electric heating unit 17 and an air volume regulating valve 3, the main air return circuit is divided into a first air return circuit 13 and a second air return circuit 12, the first air return circuit 13 is connected with the main air inlet circuit 16 for recycling, and the second air return circuit 12 is connected with a large air collection chamber 6; the air volume regulating valves 3 are arranged on the air return circuit I and the air return circuit II; an air outlet at the bottom of the oven 15 is connected with the small air collecting chamber 10, and the effect of effectively collecting bottom polluted gas can be achieved by arranging an air outlet at the bottom of the unit; micro negative pressure sensors 14 are arranged on a main air inlet circuit and a main air return circuit of the oven, so that the internal pressure of the oven is monitored in real time, and an electric signal is fed back to a main control system in real time, so that the main system can control and adjust the pressure timely and effectively; VOCs concentration sensor 7, temperature sensor 5, humidity transducer 4 and negative pressure sensor 8 of installation in the big collection chamber 6, wherein negative pressure sensor 8: the method mainly comprises the steps of detecting the negative pressure of a large air collection chamber of the oven, and completing the rotation speed regulation of a main exhaust fan and setting a pressure range by detecting the negative pressure; the air outlet of the small air collection chamber 10 is connected with the preheating assembly 1 and then connected with the large air collection chamber 6; a manual air volume adjusting valve 3 is arranged on an air outlet at the bottom of each group of drying ovens; the large gas collection chamber 6 is connected with the combustion chamber 9, when the concentration of the polluted gas in the large gas collection chamber reaches a critical value, the fan conveys the gas, the RTO carries out combustion treatment in the large gas collection chamber, and then the gas which meets the requirement of environmental protection quality is discharged outdoors. The preheating assembly 1 is of a drawer type structure, one side of the preheating assembly is an air inlet end 1-1, the other side of the preheating assembly is an air outlet end 1-4, the middle of the preheating assembly is a heating unit 1-3, and an air inlet air quantity regulating valve 1-4 is arranged on the air inlet end.
The equipment start-up process begins, and little collection chamber fan starts, and collecting device bottom is gaseous, after preheating the subassembly, transmits big collection indoorly, and in big collection indoorly, the gas through preliminary heating begins to be full of.
The air volume adjusting valve 101 of the first color group is opened, the fan and the heating unit work, after the hot air passes through secondary heating, the air volume adjusting valve is conveyed to the inside of the oven, the hot air of the main air inlet circuit of the oven passes through the air nozzle and is input into the inside of the oven, and then the hot air returns to the inside of the large air collecting chamber through the second air return circuit of the oven, wherein the air volume adjusting valve 103 is required, the minimum opening and closing range is 20% -40%, so that the large air collecting chamber can be returned to the inside air of the oven within any time, the inside air of the oven can be diluted.
In the air regulation valve inside the oven, the opening and closing angle of the air regulation valve is set, the air regulation valve 102+ the air regulation valve 103=100%, and meanwhile, the air return pressure inside the oven is greater than the air inlet pressure, so that a micro-negative pressure condition is formed.
And feeding back signals through a micro negative pressure sensor in the oven, adjusting the opening and closing angles of the air volume adjusting valves 102 and 101 under the condition that the micro negative pressure state is not achieved, forming an air volume difference by forming a difference value of the opening and closing angles, and adjusting the angles of the 102 and 101 air volume adjusting valves to finish micro negative pressure adjustment.
If the angle of the air volume adjusting valve 103 cannot meet the use requirement through adjusting 102 and 101, the air volume adjusting valve 103 is completely opened at the moment to reach a 100% state, the return air volume and the air pressure are increased, and if the return air volume and the air pressure cannot be met, the power of a main exhaust fan is increased until a set value is reached.
In the process of treating the tail gas of the oven unit, the air volume regulating valves 104, 204, 304, 404 and the like need to be manually regulated, and the like are controlled through the air volume between the air volume regulating valves of the units, so that one group is less than two groups and three groups are less than four groups, and the like, and the fan can effectively extract the tail gas of the last color unit.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (5)
1. A solvent drying energy-saving emission-reducing drying system of large-scale printing equipment is characterized by comprising a large gas collecting chamber, a small gas collecting chamber, at least one group of drying ovens, a preheating assembly, a negative pressure sensor, a micro negative pressure sensor, a combustion chamber and a fan;
the air inlet of the oven is connected with a main air inlet circuit, the air outlet of the oven is connected with a main air return circuit, a fan, an electric heating unit and an air volume adjusting valve are arranged on the main air inlet circuit, the main air return circuit is divided into a first air return circuit and a second air return circuit, the first air return circuit is connected with the main air inlet circuit for recycling, and the second air return circuit is connected with a large air collection chamber; the air volume regulating valves are arranged on the air return circuit I and the air return circuit II; an air outlet at the bottom of the oven is connected with a small air collecting chamber;
a micro negative pressure sensor is arranged on a main air inlet circuit and a main air return circuit of the oven;
a VOCs concentration sensor, a temperature sensor, a humidity sensor and a negative pressure sensor are arranged in the large gas collection chamber;
and an air outlet of the small air collecting chamber is connected with the large air collecting chamber after being connected with the preheating assembly.
2. The solvent drying energy-saving emission-reducing drying system of the large-scale printing equipment according to claim 1, wherein the preheating assembly is of a drawer type structure, one side of the preheating assembly is an air inlet end, the other side of the preheating assembly is an air outlet end, the middle of the preheating assembly is a heating unit, and the air inlet end is provided with an air inlet volume regulating valve.
3. The solvent drying energy-saving emission-reducing drying system of large-scale printing equipment according to claim 2, wherein the heating unit is an electric heating device, a water heating device, an oil heating device or an oil-electric combined heating device.
4. The solvent drying energy-saving emission-reducing drying system of the large-scale printing equipment according to claim 1, wherein an air volume adjusting valve is arranged on an air outlet at the bottom of the drying oven.
5. The solvent drying energy-saving emission-reducing drying system for the large-scale printing equipment according to claim 1, wherein the large gas collection chamber is connected with a combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011423758.8A CN112590384A (en) | 2020-12-09 | 2020-12-09 | Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011423758.8A CN112590384A (en) | 2020-12-09 | 2020-12-09 | Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment |
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| CN112590384A true CN112590384A (en) | 2021-04-02 |
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| CN202011423758.8A Pending CN112590384A (en) | 2020-12-09 | 2020-12-09 | Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007320182A (en) * | 2006-06-01 | 2007-12-13 | Daikin Ind Ltd | Exhausting system for printing machine |
| US20110017083A1 (en) * | 2009-07-24 | 2011-01-27 | Renzo Melotti | Drying equipment with false air treatment for printing machines |
| EP3208565A1 (en) * | 2016-02-18 | 2017-08-23 | New Instruments and Research for Analysis Srl | Automatic exhaust air recirculation system for a printing machine of the flexographic or rotary type, or for a laminating machine |
| CN208832924U (en) * | 2018-08-13 | 2019-05-07 | 广州澧信服装辅料有限公司 | A kind of textile drying unit |
| CN209289926U (en) * | 2018-08-27 | 2019-08-23 | 青岛成盛林环保设备有限公司 | Novel gravure printing machine checking enrichment exhaust system |
| CN111703196A (en) * | 2020-07-01 | 2020-09-25 | 大连奥特马工业有限公司 | Electric heating system for drying oven of printing machine |
| CN111716898A (en) * | 2020-07-01 | 2020-09-29 | 大连奥特马工业有限公司 | Electric heating system with double gas collection chambers for drying oven of printing machine |
| CN215883011U (en) * | 2020-12-09 | 2022-02-22 | 大连奥特马工业有限公司 | Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment |
-
2020
- 2020-12-09 CN CN202011423758.8A patent/CN112590384A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007320182A (en) * | 2006-06-01 | 2007-12-13 | Daikin Ind Ltd | Exhausting system for printing machine |
| US20110017083A1 (en) * | 2009-07-24 | 2011-01-27 | Renzo Melotti | Drying equipment with false air treatment for printing machines |
| EP3208565A1 (en) * | 2016-02-18 | 2017-08-23 | New Instruments and Research for Analysis Srl | Automatic exhaust air recirculation system for a printing machine of the flexographic or rotary type, or for a laminating machine |
| CN208832924U (en) * | 2018-08-13 | 2019-05-07 | 广州澧信服装辅料有限公司 | A kind of textile drying unit |
| CN209289926U (en) * | 2018-08-27 | 2019-08-23 | 青岛成盛林环保设备有限公司 | Novel gravure printing machine checking enrichment exhaust system |
| CN111703196A (en) * | 2020-07-01 | 2020-09-25 | 大连奥特马工业有限公司 | Electric heating system for drying oven of printing machine |
| CN111716898A (en) * | 2020-07-01 | 2020-09-29 | 大连奥特马工业有限公司 | Electric heating system with double gas collection chambers for drying oven of printing machine |
| CN215883011U (en) * | 2020-12-09 | 2022-02-22 | 大连奥特马工业有限公司 | Solvent drying energy-saving emission-reducing drying system of large-scale printing equipment |
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