CN206718712U - Intaglio press air circulation system - Google Patents

Abstract

It the utility model is related 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 bifurcates, 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.The utility model efficiently improves VOCs concentration in intaglio press discharge waste gas and, to avoid the too fast dry surface cure of block letter surface ink, air quantity is discharged so as to which the solvent in block letter curing ink can successfully volatilize while reduce intaglio press.

Description

Intaglio press air circulation system

Technical field

Energy-saving and emission-reduction, specially intaglio press air circulation system are the utility model is related to, how efficiently to improve intaglio plate VOCs concentration in printing machine discharge waste gas, avoids the too fast dry surface cure of block letter surface ink, in block letter curing ink Solvent can successfully volatilize.

Background technology

Intaglio printing at present is exactly generally to take solvent-borne type oily so far coated in then being dried in printed body in ink Ink, the i.e. ink containing VOCs, the ink containing VOCs can produce the largely gas containing VOCs in drying course.Because VOCs is The precursor of atmospheric haze is produced, VOCs can be with NOxization present in air under sunlight after being discharged into air To learn reaction generation PM2.5 and have the ozone of injury to human body, China has taken up severe regulation means limitation VOCs discharge, The VOCs of gravure printing process discharge is destroyed using heating power oxidation or catalytic oxidation technologies is considered as maximally effective attenuating intaglio plate Print VOCs and pollute one of maximally effective technological means.

Although VOCs discharges can be reduced using water-based ink, it is complete in intaglio printing due to technology and economic cause Face needs the regular hour using water-based ink.It is particularly significant how development eliminates VOCs pollutions technology caused by existing ink.

Using oxidation technology, it is that a kind of highly effective VOCs eliminates skill to eliminate VOCs with catalysis oxidation comprising heating power 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, which eliminates VOCs, With carbon dioxide, and catalytic oxidation technologies be 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 elimination VOCs, and the cost of investment of equipment is with needing wind to be processed Measure relevant, 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 VOCs concentration influences the operating cost of equipment in gas.Thus, intaglio press discharge air quantity is reduced with improving in intaglio printing VOCs concentration, it 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 that intaglio printing industry must solve the problems, such as.

The content of the invention

The purpose of this utility model is to be directed to above-mentioned problem and shortage, there is provided a kind of efficiently to improve intaglio printing VOCs concentration is to avoid the too fast dry surface cure of block letter surface ink in machine discharge waste gas, so as in block letter curing ink Solvent can successfully volatilize and meanwhile reduce intaglio press discharge air quantity intaglio press air circulation system.

Above-mentioned purpose of the present utility model 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.........), exhausting Machine MB, VOCs concentration detector；

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 exhaust duct end End bifurcates, and a branch road leads to each print couple with circulation return air, another branch road connection air exhauster MB and VOCs Concentration Testings Emptied after instrument, 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.........）Air inlet is connected, passes through return air regulating valve An (n=1,2,3.........) and total air escape pipe branch road Communicate.

Technical scheme two, each group print couple is in parallel, every group of total exhaust duct of print couple exhaust outlet connection, on total exhaust duct If the branch road for leading to each print couple passes through air exhauster MB and VOCs Concentration Testing instrument heel row with circulation return air, exhaust duct tail end Sky, air exhauster MB are 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.........）Air inlet is connected, is communicated by return air regulating valve An (n=1,2,3.........) with total air escape pipe.

Above technical scheme is adjusted according to the big minor adjustment fresh air valve valve of every group of printing drying tunnel surface covered with return air Solvent strength is to ensure the economy of follow-up exhaust-gas treatment and printing in the relative scale control printing drying tunnel of section 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 It hurry up, print the evaporation rate of solvent increase put on；Need to establish 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 controlled by VOCs Concentration Testings instrument, and air exhauster MB frequencies are adjusted according to VOCs concentration Rate, if the VOCs concentration detected is less than setting value, air exhauster MB running frequencies decline, when the VOCs concentration detected 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, Valve for air exhaust, return air regulating valve valve and the fresh air replenishment valve valve of corresponding print couple all in closed mode, with Reduce the concentration of VOCs in the exhaust air rate and increase discharge waste gas of printing machine.

The utility model uses above-mentioned structure design, and its advantage is shown as：

1st, printing drying tunnel circulation air extracts from exhaust, and VOCs concentration increases considerably in drying tunnel circulation air, printing The concentration difference that surface solvent evaporation needs declines, and evaporation rate of solvent reduces and thus avoids the too fast dry table of block letter surface ink Face solidifies, and the solvent in block letter curing ink can successfully volatilize, and thus, the printing drying tunnel for taking the utility model to describe follows The dissolvent residual in block letter can be greatly lowered in ring method；

2nd, when certain group print couple is idle, all valves in corresponding print couple are closed, printing machine air draft Thus amount declines.In addition, exhaust air rate is controlled by VOCs concentration, total exhaust air rate is easy to control.

The utility model is further described below in conjunction with the accompanying drawings.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the present utility model；

Fig. 2 is another structural representation of the present utility model.

Embodiment

Embodiment 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, row Gas air control 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 bifurcates, One branch road flows to each print couple with circulation return air, another branch road connection air exhauster MB and VOCs concentration by return air regulating valve An 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, are adjusted by return air Section valve A1 communicates with total air escape pipe branch road.

Embodiment 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 still 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, row Gas air control 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 The branch road of swabbing group is with circulation return air, and exhaust duct tail end is empty by air exhauster MB and VOCs Concentration Testing instruments heel row, air exhauster 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, are adjusted by return air Valve A1 communicates with total air escape pipe.

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

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

Above-described embodiment is the preferable embodiment of the utility model, but embodiment of the present utility model is not by above-mentioned The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace Generation, combination, simplify, should be equivalent substitute mode, be included within the scope of protection of the utility model.

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 bifurcates, a branch road Lead to each print couple with circulation return air, another branch road connection air exhauster and VOCs Concentration Testing instruments heel row are empty, 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 Big minor 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, it is empty with VOCs Concentration Testing instruments heel row that exhaust duct tail end passes through 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 Big minor 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.