JPS58181649A - Drying furnace having deodorizing device for printer - Google Patents

Abstract

PURPOSE:To make the amount of exhausting air constant regardless of the magnitude of a hot air temperature, by controlling the mixture of the used hot air, which is sent to a deodorizing chamber by an odor blower and processed high temperature air so that the temperature of the mixture becomes a preset constant temperature. CONSTITUTION:The temperature of a used hot air 4', which is sent to an odor collecting chamber 15, is 150-200 deg.C. Meanwhile the temperature of high temperature air 31 is about 350 deg.C. When the temperature of the mixture, which is obtained by mixing both airs, is lower than a preset value TS, a temperature adjusting meter 33 sends a signal to a control motor 29, adjusts the opening degree of a damper 30, and increased the hot temperature air 31. Conversely, when the temperature of the mixture is higher than the preset value TS, the opening degree is controlled so that the amount of the hot temperature air 31 is decreased. As a result, the temperature of the air, which is sent to deodorizing chamber 7 by an odor blower 17, becomes the constant value TS.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly involves blowing hot air onto a strip of printed matter.
The present invention relates to a hot air drying oven for drying ink that has a deodorizing device integrated therein.

The applicant has proposed a drying furnace for deodorization that is integrally equipped with a deodorizing device and uses the heat generated by the deodorizing device as a component of hot air for drying.
Title of the invention Drying oven for printed matter and patent application No. 53-111690 (Patent application No. 56-1723)
1. Title of the invention Discloses a method for controlling exhaust/circulation air in a drying oven for printing proboscis.

However, in the method of this et al., all of the high temperature hot air from the deodorizing room except for the part released to the outside air was sent to the hot air generation room. There were some disadvantages, such as difficulty. In contrast, the applicant filed Utility Model Application No. 55-41424 (Utility Application No. 56-143044).
) Title of the invention Discloses a device for distributing treated high-temperature hot air in a drying oven equipped with a deodorizing device, by further branching the outside of the circulation of the treated high-temperature hot air into the portion going to the hot air generation chamber and the portion returning to the deodorizing chamber. When relatively high-temperature hot air is used, send the entire amount to the hot-air generation chamber, and when using relatively high-temperature hot air, for example, if hot air at a temperature of 220℃ or higher is required, half should be returned to the dehulling chamber. A half-open Danno was provided.

As a result, even when using low-power hot air, it is possible to control the hot air]<-r, and at the same time, when using low-power hot air, the total combustion amount is lower than that in the United States.

However, even with this method, only the low-temperature side hot air area is removed step by step, and the lower the hot air temperature in each range of the low-temperature side hot air area or the high-temperature side hot air area, the lower the used hot air temperature is. Since the temperature is also lower, the amount of air sent into the deodorizing chamber by the odor blower increases by a large amount, and therefore the amount of exhaust air to the outside also increases. It still had the disadvantage of increasing quantity.

The purpose of the present invention is to maintain a constant amount of exhaust air regardless of the temperature of the hot air used, to prevent waste due to a large amount of exhaust air due to a low hot air temperature, and to prevent white air from the entrance and exit of the drying oven when the hot air temperature is high. Eliminate smoke blow-off, and if the hot air temperature is high or low, making the operator uneasy about the operation, and if there is a large amount of solvent vapor in the used hot air, turn off the burner in the deodorizing chamber. An object of the present invention is to provide a drying oven which is suitable for use as a deodorizing device for a printing press, which is capable of performing so-called self-combustion deodorizing.

The present invention will be explained by way of examples and with reference to the drawings.

In Figure 1 of the funeral, the hot air generation chamber (2) located in the drying oven (11)
) is equipped with a burner (3), and in the hot air generation chamber (2), the used hot air (4) returning from the drying oven (tl), the suction air (6) from the smoke exhaust hood (3)), and the deodorizing chamber (tl) are used. A mixture of treated high-temperature hot air (8) is passed through a hot air circulation blower (9) to a hot air blowing nozzle (lots).
Hot air for drying (12
), IS appears as if blowing out.

Then, this drying hot air (12+ is the desired set temperature 'I
A temperature controller (not shown) gives a signal to the control motor (+3) so that the burner (:3)
The opening of the fuel control valve is automatically controlled.

The used hot air (4) returning from the drying oven (1) goes to the hot air generation chamber (2) mentioned above, and a portion (1) also passes through the odor collection chamber (enters the circle and filter 06). It is mixed with treated high-temperature hot air (31), which will be described later, and sent into the deodorizing chamber (71) by the odor blower 07).

The deodorizing chamber (7) is equipped with a preheater (-su 08), and a mixture of this used hot air (4) containing solvent vapor is heated in a catalyst layer 09) provided in the deodorizing chamber (7). Heat to a temperature suitable for oxidation reaction.

The combustion of this preheating burner is controlled by a control motor (2) by a temperature controller (not shown) so that the temperature obtained by the preheating temperature detector (4) of the deodorizing chamber (7) is maintained at the set value.
1) to automatically adjust the opening degrees of the fuel regulating valves (2) of the preheating burner 08).
It's on.

The treated high-temperature hot air (2
The first branch of the duct (24
) In the evening, the pump (25) is used to partially exhaust the air (26).
The remainder of n1 is released into the atmosphere as circulating high-temperature hot air (27) and is refluxed into the stem.

The high temperature circulating hot air (27) is passed through a damper (30) driven by a control motor (29) provided at the second branch.
The hot air is divided into high-temperature hot air (8) that heads toward the hot-air generation chamber (2) and high-temperature hot air (31) that surrounds the odor area.

The high-temperature hot air (31) heading towards the odor collecting room θ5) is combined with the used hot air (4) returning from the drying room (1) at the air collecting room LI5J, and is prevented from being drawn into the deodorizing room by the odor blower q″D. This is the same as described above.

The temperature of the mixture sent from the odor collecting room (15) by the odor blower 07) is measured by a temperature detector (3Z) installed in the duct.
Temperature controller (:1:
3) The control motor (two-drive damper (30)) provided in the second branch (28) that automatically adjusts the opening degree according to the signal from the controller is activated.

The above is a description of the hot air circulation system including the heating or distribution control system according to the present invention.

Regarding fresh air, a heat exchanger is incorporated in the exhaust duct (34) exiting from the first branch part Qv, and the fresh air sent by the combustion blower (36) passes through this heat exchanger. Temporarily warmed by the combustion air duct) (37) f, the deodorizing chamber (power preheating burner (1)
81 and the hot air burner (3) of the hot air generation chamber (2).

In addition, a part of the combustion air duct (37) is further branched and connected to the hot air generation chamber (2), and the one that goes to the preheating burner u8) and the heat burner no (:3) is an air/ring. It is operated by a damper (38) that opens and closes.

Now, the effects of the present invention will be explained in detail.

Set value TS for the air-fuel mixture after merging in the 4-gas mixture chamber (I!51)
For example, set the temperature control 33) to 250°C.

The used hot air (4) entering the odor collection room 0ω is 150~2
It is around 00℃. - The blade high temperature hot air (31) is around 350°C. If the temperature of the mixture obtained by merging these two is lower than the set value TS, the temperature controller (33) will switch to control 1.
Support the signal to the knoll motor (c) and adjust the opening degree of the damper (to) to increase the amount of high-temperature heat (K31), and conversely, if it is higher than the set value IS, increase the amount of high-temperature heat (K31). Control the opening degree to reduce the amount. As a result, the temperature of the air sent into the deodorizing chamber (7) by the odor blower 07) becomes a constant value '1'S.

In general, even if the apparent air volume of a blower is constant, if the temperature of the air passing through it changes, the mass or air volume converted into drifting condition (so-called Nd/m) will change.

In addition, there was no device to keep the temperature of the air sent into the deodorizing room by the odor blower constant, so when the hot air temperature for drying was set high, the temperature in this area was also high, and the hot air temperature was set low. In this case, the temperature in this part was low. As a result, the actual air flow sent into the deodorizing chamber was small when the hot air temperature was high, and increased when the hot air temperature was low.

Now, the amount of exhaust gas that is released into the atmosphere out of the purified high temperature hot air that passes through the deodorizing chamber (power) is
Since the opening degree of the damper in the branch system is a constant ratio to the amount of passing air, the amount of exhaust air is small when the hot air temperature is high, and substantially increases when the hot air temperature is low.

Now, expressing this displacement in the standard state, ENn1゛/MuR
Air supplied to preheating burner VV+ Nrrl/
= Air supplied to the hot air burner (3) W2 Air sucked in from the N-metal smoke hood ZNJF//mxi
, fLAir from the entrance/exit of the dry beach RN, //EntertainmentTruself, the amount of air entering this system and the amount of air exiting (1 degree, so the following equation holds true.

E2 W1 + W2 + processing 1 (LIE-), the suction amount R from the dryer entrance and exit is 1 and 2 E
-(W+ +W2 +Z), and if the amounts of silk, W2, and Z are constant, it can be seen that the suction lit of the drying tongue changes by the amount U) when the exhaust tE changes. In conventional apparatuses, when the hot air temperature was set low due to the low printing speed, etc., the exhaust volume was large, and therefore the suction volume from the drying furnace was also large. This results in additional cooling in the drying oven, increased fuel consumption in the burner, and
In the present invention, the temperature of the air sent into the deodorizing chamber (7) can be kept constant regardless of whether the hot air temperature is high or low. Therefore, it is necessary to keep the suction amount R′j6 from the dryer inlet and exit, and the exhaust air flow E to the necessary minimum constant value, so that the inside of the drying oven is not wasted and the amount of heat taken out from the exhaust air is also reduced. f to keep it to a minimum.

Let's briefly think about printing speed. As the printing speed increases, the amount of heat per hour that must be transferred to the strip-shaped printed matter increases, so the temperature of the hot air for drying must be increased.
- If the hot air burner (3) burns too much, then f
It looks sad. However, since the air sent into the deodorizing chamber (by the odor blower 07) is at a constant temperature and constant quantity, the amount of heat to heat it to the preheating temperature TA is constant, and the reaction temperature with the air passing through the catalyst layer 01 is The temperature becomes high due to the high concentration of solvent vapor.

Therefore, high-temperature hot air (31
), the high-temperature hot air (8) sent into the hot-air generation chamber (2) becomes hotter and the air volume increases. For this reason, the combustion amount of the hot air burner (3) usually decreases slightly.

In detail, since the exhaust gas temperature also becomes higher, the temperature of the combustion air heated by the heat exchanger source: 35) also increases by 1, jJ.
< 3 to the preheating burner (] 8) and hot air burner.
) to reduce the burden on For this reason, as the printing speed increases, the amount of combustion of the preheating pulse (18) also decreases.

On the other hand, when the printing speed is low and the hot air temperature is set low, the combustion amount (J
The temperature of the hot air burner (3) increases by the amount of the temperature decrease of the combustion air, but it does not change much. On the other hand, the temperature of the high temperature hot air (8) drawn into the hot air generation chamber (2) decreases and the amount () of the hot air burner (3) decreases.
However, since the set hot air temperature is low, there is no need for much additional combustion, and the disadvantageous ratio at low speeds is extremely small.

Another new feature of the present invention is that when the concentration of solvent vapor in the used hot air is still < 5, the deodorizing chamber (preheating burner) does not need to be burned.

-f f,t That is, when the amount of ink is large and the printing speed is fast, the J degree of the solvent vapor contained in the used hot air F4), +41 becomes high. At this time, when passing through the catalyst layer a (
−teυ) The reaction temperature increases.

Therefore, when the reaction temperature T IJ reaches a set temperature on the high temperature side, for example 420° C., the odor temperature 1” S sent by the odor blower (171) is automatically raised to the preheating temperature T A.

This means that when the reaction temperature HTB is at 420°C, the temperature controller (33) which outputs an electric signal and controls the damper 60 of the second branch (c) by that signal. This is possible by accessing a temperature controller (not shown) that controls the combustion of the preheating burner U8+.

In addition, this signal simultaneously preheats the fuel,
The combustion is stopped by cutting off the common supply, and the damper (38) installed in the duct 1-(37) that guides the combustion air Wt is switched to stop the supply of air for combustion, and this amount is converted into hot air. Send it to the outbreak room (2).

Due to this, the opening degree of the damper (30) is controlled so that the odor temperature 'rS reaches the preheating temperature 'rA, for example, 300°C.
As a tentative assumption, even if the 5-burner type is not burned or disposed of, the heated hot air that enters the deodorizing chamber (7) will reach a temperature that has passed through the catalytic reaction, and the result will be 1
The oxidation reaction in the separated catalyst layer is sustained.

In JJ Tokaze Genju'to (2), the amount of combustion increases slightly because the violet intensity of the high-temperature hot air 18) that enters the area decreases.
The amount of combustion decreases as it becomes a waste storage. Also, the fact that the number of combustion engines is 11 times as high as 11 times means that the risk of the burner becoming unstable due to an extremely low firing weight has been stopped.

The deodorizing chamber (controls the temperature of the used hot air entering the power supply at a constant temperature 1, or makes the deodorizing chamber (7) self-combustible)
There is no need for person E to operate the damper (30), and the burden on the operator is reduced.

Figure 2 shows a comparison regarding the amount of combustion. It's a small thing.In addition, (,
At 450 rpm and 500 rpm on the Ichikawa line, the amount of combustion is particularly F.]) This is due to self-combustion.

According to the present invention, the exhaust gas is of course non-polluting and is also emitted, and has the following advantages.

IJ The suction from the exhaust type or drying oven is heat) Regarding how to set the paper temperature fa < a certain amount f There's only one thing to do.

2) Heat: Regardless of the setting of the louse temperature, it is possible to eliminate barking from the drying oven entrance and exit. In case (the preheating burner in the deodorizing chamber is stopped and the self-combustion deodorizing power), the burner of 2115 is damaged and the combustion layer is reduced. Can be done.

・】) By combining the above, it is possible to determine the slowness of the indo speed and the heat stress.
1. Regardless of f09 high eight, past Q as shown in Figure 2
) Rf1 requires fewer combustion layers than a drying oven with a deodorizing device, and has an extremely large energy-saving effect.

5) The Ministry of Drifting considers the red note and says that f is a must for opening and closing the damper.
S<, the burden is reduced.

Hereinafter, J-, U) The origin point is served by a powerful opening on the slightest part of the temperature control meter, temperature detector, etc., and the effective phrase is also υノ or δU〈D.

[Brief explanation of the drawing]

, Figure A1 is a cross-sectional view explaining the crossroads of uninvention and 1st residue, and Figure 2 is a combustion weight comparison diagram explaining the energy saving property of uninvention. (1)...Drying oven, (2)...Heat lice generation chamber, (3)
・・・Nokuna, (4), 11)・Used hot air, (5
)...Fume exhaust hood, (6)...Suction aiki, (7)
... Deodorizing room, (8j... Treated high temperature hot air, (9j.
・Hot air circulation blower, (l...hot air nozzle, 01)・
・・Band printing -, +121...Hot air for drying, 03)・
・・Control motor, (lυ Fuel valve, +151・
・Odor gathering room, 06) ・Filter, αη晃空懰憬, (
18) Preheating burner, ■Catalyst layer, (20+temperature detector, Siυ...control motor, (22), 1 sho of fuel, no...treated high-temperature hot air, 04)... 1st branch, (ko5)... damper, CI! 6)・Exhaust, air conditioner・
... Circulating high-temperature hot air, (28) ... Funeral 2 Branch HL a
9 control motor, (30)... damper, (31
)...treated high-temperature hot air, (32)...temperature detector,
(33) - crystallinity controller, (34)...exhaust duct l-,
(35)・Heat exchanger, (:36)・Combustion blower, (
37)... Combustion air, air 2 duct), (38)... Damper. O 1 Figure O 2 Figure O Ma Door 17-2. s--

Claims (1)

[Scope of Claims] l) An odor collection chamber that collects a portion of the used hot air after being blown onto the strip-shaped printed matter, an odor blower that sucks it from Mikikaai and sends it to the deodorization chamber, and the used air blower. A deodorizing chamber that decomposes hot air using a catalyst, a first branch section that has a damper that divides the high-temperature hot air that has been decomposed into a portion that is released to the outside and a portion that is circulated inside the furnace, and a first branch section that separates the hot air that has been decomposed into a portion that is discharged to the outside and a portion that is circulated within the furnace. A second branch section that separates the upper and lower odor generation chambers into the odor collection chamber, an in-furnace duct that connects the deodorization chamber to the outside, hot air generation chamber, and odor collection chamber, the remainder of the used hot air after being blown onto the strip of printed material, and the above. A hot air generation chamber that sucks and mixes a portion of the treated high temperature hot air and further heats it to produce drying hot air, and a hot air circulation blower that sucks from the hot air generation chamber and blows the hot air onto the strip through a nozzle. 1. The opening degree of the distribution damper at the second branch of the furnace duct is automatically controlled so that the mixture of used hot air and treated high-temperature hot air has a temperature of 2 points. A drying oven with a deodorizing device for a printing press, characterized in that L r=. 2. In the invention of claim 1), when the dissolved concentration in the used hot air to be treated is high and the reaction temperature in the deodorizing chamber rises above the specified value, the blowing temperature of the odor blower is adjusted to the level necessary for preheating. A dryer with a deodorizing device for a printing press, characterized in that the opening degree of a damper in a second branch part is automatically adjusted so as to reach a set temperature, and combustion of a preheating burner in a deodorizing chamber is stopped.