CN106903987A - Intaglio press air circulation system - Google Patents

Abstract

The present invention relates to intaglio press air circulation system, including some print couples, air exhauster and VOCs Concentration Testing instruments；Wherein, each group print couple is in parallel, every group of print couple exhaust outlet connects total exhaust duct, total air draft pipe end is bifurcated, one branch road leads to each print couple with circulation return air, another branch road connection air exhauster is empty with VOCs Concentration Testing instruments heel row, and air exhauster runs air quantity and controlled by VOCs Concentration Testings instrument；Every group of print couple includes return air regulating valve, colour cell breeze fan, fresh air replenishment valve, evacuating air regulating valve, printing drying tunnel, air heating heat exchanger.To avoid, block letter surface ink is too fast to dry surface cure to VOCs concentration in efficiently raising intaglio press discharge waste gas of the invention, the intaglio press discharge air quantity that reduce simultaneously so that the solvent in block letter curing ink can successfully volatilize.

Description

Intaglio press air circulation system

Technical field

The present invention relates to energy-saving and emission-reduction, how specially intaglio press air circulation system efficiently improves intaglio printing VOCs concentration in machine discharge waste gas, it is to avoid block letter surface ink is too fast to dry surface cure, the solvent in block letter curing ink Can successfully volatilize.

Background technology

Exactly be coated in printed body ink and then drying by current intaglio printing, and solvent-borne type oil is generally taken so far Ink, the i.e. ink containing VOCs, the ink containing VOCs can produce the substantial amounts of gas containing VOCs in drying course.Because VOCs is After producing the precursor of atmospheric haze, VOCs to be discharged into air under sunlight irradiation can and NOxization present in air Learn reaction generation PM2.5 and have the ozone of injury to human body, China has taken up the discharge that severe regulation means limit VOCs, The VOCs for destroying gravure printing process discharge using heating power oxidation or catalytic oxidation technologies is considered as maximally effective attenuating intaglio plate Printing VOCs pollutes one of maximally effective technological means.

Although can reduce VOCs using water-based ink to discharge, it is complete in intaglio printing due to technology and economic cause Face needs the regular hour using water-based ink.The VOCs pollution technologies how development eliminates existing ink generation are particularly significant.

Using oxidation technology, it is that a kind of highly effective VOCs eliminates skill to eliminate VOCs comprising heating power oxidation and catalysis oxidation Art.It is exactly VOCs is resolved into the water being had no adverse effect to environment at a temperature of 700 DEG C or so that heating power oxidation eliminates VOCs With carbon dioxide, and catalytic oxidation technologies are exactly VOCs is changed at relatively low temperatures to environment under catalyst action The water and carbon dioxide having no adverse effect.

No matter heating power oxidation eliminates VOCs or catalysis oxidation eliminates VOCs, the cost of investment of equipment with need to wind to be processed Amount is relevant, and air quantity is bigger, and cost of investment is higher.In addition, no matter heating power oxidation eliminates VOCs or catalysis oxidation elimination VOCs, give up The concentration of VOCs influences the operating cost of equipment in gas.Thus, in reduction intaglio press discharge air quantity and raising intaglio printing VOCs concentration, is the key for economically eliminating intaglio printing VOCs pollutions.

In addition, when being printed using solvent-based ink, on printed matter dissolvent residual be perplex intaglio printing major issue it One, how to reduce the dissolvent residual on printed matter is also the problem that intaglio printing industry must be solved.

The content of the invention

It is an object of the invention to be directed to above-mentioned problem and shortage, there is provided a kind of efficiently to improve intaglio press row To avoid, block letter surface ink is too fast to dry surface cure to VOCs concentration in putting waste gas, so that the solvent in block letter curing ink Can successfully be volatilized the intaglio press air circulation system that intaglio press discharges air quantity that reduce simultaneously.

Above-mentioned purpose of the invention is to be achieved by the following technical programs：

Intaglio press air circulation system, including some groups of print couple X n (n=1,2,3.........), air exhauster MB, VOCs concentration detectors；

Every group of print couple includes return air regulating valve An (n=1,2,3.........), colour cell breeze fan Cn (n=1,2, 3.........), fresh air replenishment valve Dn (n=1,2,3.........）, evacuating air regulating valve En (n=1,2, 3.........）, and printing drying tunnel Bn (n=1,2,3.........）, air heating heat exchanger Hn（n=1、2、.....）；

Technical scheme one, each group print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, total air draft pipe end point Two branch roads a, branch road leads to each print couple with circulation return air, and another branch road connects air exhauster MB and VOCs Concentration Testing instruments After empty, air exhauster MB is located at the overall top of intaglio press air circulation system；

Colour cell breeze fan Cn (n=1,2,3.........) air inlet respectively by fresh air replenishment valve Dn (n=1,2, 3.........）Connection air inlet, by return air regulating valve An (n=1,2,3.........) and total air escape pipe branch road phase It is logical.

Technical scheme two, each group print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, on total exhaust duct If leading to the branch road of each print couple with circulation return air, exhaust duct tail end is by air exhauster MB and VOCs Concentration Testing instrument heel row Sky, air exhauster MB is located at intaglio press air circulation system entirety bottom；

Colour cell breeze fan Cn (n=1,2,3.........) air inlet respectively by fresh air replenishment valve Dn (n=1,2, 3.........）Connection air inlet, is communicated by return air regulating valve An (n=1,2,3.........) with total air escape pipe.

Above technical scheme is adjusted according to every group of size adjustment fresh air valve valve of printing drying tunnel surface covered and return air Solvent strength is to ensure economy and the printing of follow-up exhaust-gas treatment in saving the relative scale control printing drying tunnel of valve valve Operated under conditions of away from explosion ratio.

The evaporation in block letter of solvent in ink, it is necessary to meet two conditions simultaneously, first, evaporation need heat, It is currently that block letter is transferred heat to by drying tunnel recirculated hot air, drying tunnel return air quantity is bigger, and heat transfer speed is got over Hurry up, the evaporation rate of solvent that printing is put on increases；Need to set up block letter surface VOCs concentration and circulation air when the second, evaporating Concentration difference between VOCs concentration, evaporation rate of solvent is faster in the bigger block letter of concentration difference.

Air exhauster MB runs air quantity and is controlled by VOCs Concentration Testings instrument, and air exhauster MB frequencies are adjusted according to VOCs concentration Rate, if the VOCs concentration for detecting is less than setting value, air exhauster MB running frequencies decline, when the VOCs concentration for detecting is higher than Setting value, air exhauster MB running frequencies rise.

Every group of print couple gas exhaust piping installs valve for air exhaust, in certain group or idle a few groups of print couples, The correspondence valve for air exhaust of print couple, return air regulating valve valve and fresh air replenishment valve valve all in closed mode, with The exhaust air rate for reducing printing machine and the concentration for increasing VOCs in discharge waste gas.

The present invention uses above-mentioned structure design, its advantage to show as：

1st, printing drying tunnel circulation air is extracted from exhaust, and VOCs concentration is increased considerably in drying tunnel circulation air, prints surface The concentration difference that solvent evaporation needs declines, and thus evaporation rate of solvent reduction avoids the too fast surface that dries of block letter surface ink from consolidating Change, the solvent in block letter curing ink can successfully volatilize, thus, the printing drying tunnel round-robin method for taking the present invention to describe can So that the dissolvent residual in block letter is greatly lowered；

2nd, certain group print couple it is idle when, correspondence print couple on all valve closings, printing machine exhaust air rate by This declines.In addition, exhaust air rate is controlled by VOCs concentration, total exhaust air rate is easy to control.

The present invention is further illustrated below in conjunction with the accompanying drawings.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the invention；

Fig. 2 is another structural representation of the invention.

Specific embodiment

Implementation method one：As shown in figure 1, intaglio press air circulation system, including some groups of print couple X n (n= 1st, 2,3.........), air exhauster MB, VOCs concentration detector, the present embodiment uses 8 groups of print couples；

Every group of print couple includes return air regulating valve An (n=1,2,3.........), colour cell breeze fan Cn (n=1,2, 3.........), fresh air replenishment valve Dn (n=1,2,3.........）, evacuating air regulating valve En (n=1,2, 3.........）, and printing drying tunnel Bn (n=1,2,3.........）, air heating heat exchanger Hn（n=1、2、.....）；

By taking X1 print couples as an example, including return air regulating valve A1, colour cell breeze fan C1, fresh air replenishment valve D1, exhaust sky Gas regulating valve E1, printing drying tunnel B1, air heating heat exchanger H1.

Each group print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, and total air draft pipe end is bifurcated, One branch road flows to each print couple with circulation return air by return air regulating valve An, and another branch road connects air exhauster MB and VOCs concentration Emptied after detecting instrument, air exhauster MB is located at the overall top of intaglio press air circulation system；

Colour cell breeze fan C1 air inlets connect air inlet by fresh air replenishment valve D1 respectively, by return air regulating valve A1 is communicated with total air escape pipe branch road.

Implementation method two：As shown in Fig. 2 intaglio press air circulation system, including some groups of print couple X n (n= 1st, 2,3.........), air exhauster MB, VOCs concentration detector, the present embodiment remains unchanged using 8 groups of print couples；

Every group of print couple includes return air regulating valve An (n=1,2,3.........), colour cell breeze fan Cn (n=1,2, 3.........), fresh air replenishment valve Dn (n=1,2,3.........）, evacuating air regulating valve En (n=1,2, 3.........）, and printing drying tunnel Bn (n=1,2,3.........）, air heating heat exchanger Hn（n=1、2、.....）；

By taking X1 print couples as an example, including return air regulating valve A1, colour cell breeze fan C1, fresh air replenishment valve D1, exhaust sky Gas regulating valve E1, printing drying tunnel B1, air heating heat exchanger H1.

Each group print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, is set on total exhaust duct and leads to each print , with circulation return air, exhaust duct tail end is by air exhauster MB and VOCs Concentration Testing instruments heel row sky, air exhauster for the branch road of swabbing group MB is located at intaglio press air circulation system entirety bottom；

Group breeze fan C1 air inlets connect air inlet by fresh air replenishment valve D1 respectively, by return air regulating valve A1 Communicated with total air escape pipe.

Valve for air exhaust is installed on every group of print couple gas exhaust piping.

When printing machine is used, some print couples are started as needed, it is idle in certain group or a few groups of print couples When, valve for air exhaust, return air regulating valve valve and the fresh air replenishment valve valve of print couple are corresponded to all in closing shape State, to reduce the exhaust air rate of printing machine and increase the concentration of VOCs in discharge waste gas.

Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (2)

1. intaglio press air circulation system, it is characterised in that:

Including some print couples, air exhauster and VOCs Concentration Testing instruments；

Each print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, and total air draft pipe end is bifurcated, a branch road Lead to each print couple with circulation return air, another branch road connection air exhauster is empty with VOCs Concentration Testing instruments heel row, air exhauster fortune Sector-style amount is controlled by VOCs Concentration Testings instrument, and air exhauster is located at the overall top of intaglio press air circulation system；

Every group of print couple includes return air regulating valve, colour cell breeze fan, fresh air replenishment valve, evacuating air regulating valve, print Brush drying tunnel, air heating heat exchanger；

Colour cell breeze fan air inlet connects fresh air replenishment valve and return air regulating valve, according to each printing drying tunnel surface covered Size adjustment fresh air valve valve and return air regulating valve valve relative scale control printing drying tunnel in solvent strength；

Valve for air exhaust is installed on every group of print couple gas exhaust piping.

2. intaglio press air circulation system, it is characterised in that:

Including some print couples, air exhauster and VOCs Concentration Testing instruments；

Each print couple is in parallel, and every group of print couple exhaust outlet connects total exhaust duct, is set on total exhaust duct and leads to each print couple Branch road with circulation return air, exhaust duct tail end is empty with VOCs Concentration Testing instruments heel row by air exhauster, air exhauster operation air quantity Controlled by VOCs Concentration Testings instrument, air exhauster is located at intaglio press air circulation system entirety bottom；

Every group of print couple includes return air regulating valve, colour cell breeze fan, fresh air replenishment valve, evacuating air regulating valve, print Brush drying tunnel, air heating heat exchanger；

Colour cell breeze fan air inlet connects fresh air replenishment valve and return air regulating valve, according to each printing drying tunnel surface covered Size adjustment fresh air valve valve and return air regulating valve valve relative scale control printing drying tunnel in solvent strength；

Valve for air exhaust is installed on every group of print couple gas exhaust piping.