JPH02273509A - Air drier - Google Patents

Abstract

PURPOSE:To improve adsorption efficiency and economical efficiency by providing a circulation blower and a cooler separately, and forming successively a closed circuit using said devices and an adsorption column wherein thermal regeneration has been completed to cool the adsorbents therein so that adsorption capacity of the adsorbents can be effectively utilized. CONSTITUTION:A plurality of adsorption columns 2, 3 loaded adsorbents 20, 30, heating means 9, cooling means 11, 12, and changeover means 5 to 8 and 17 for changing over lines connecting aforesaid devices are provided to heat or cool raw air, and said air is passed through the columns 2, 3 to effect the adsorption treatment to collect the moisture to be adsorbed on said adsorbents and the thermal regeneration to remove the moisture from used adsorbents through each of the columns 2, 3 successively, so that dried air is obtained continuously. And a circulation blower 15 and a cooler 16 are provided separately so that a closed circuit is formed successively by means of these devices and the adsorption column wherein said thermal regeneration has been completed to cool the adsorbents after the thermal regeneration. As a result, adsorption capacity of adsorbents can be effectively utilized, thereby improving adsorption efficiency and economical efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air drying apparatus that is provided with a plurality of adsorption towers to continuously obtain dry air.

[Conventional technology]

Currently, air drying equipment used for boat fishing compresses raw air, cools it, and sends it into an adsorption tower filled with adsorbents such as activated carbon, alumina, and silica gel.
Dry air is obtained through an adsorption operation in which the moisture contained in the raw air is adsorbed by an adsorbent, and then sent out as a product. In such an air drying device, it is necessary to regenerate the adsorbent each time the adsorbent is allowed to adsorb for a predetermined period of time in order to remove the adsorbed moisture and enable reuse for adsorption operations. . This regeneration is generally carried out by so-called thermal regeneration, in which high-temperature air is passed through the adsorption tower to heat the adsorbent in the adsorption tower and evaporate and remove the adsorbed water. In addition, when thermal regeneration is performed, the regenerated adsorbent is at a high temperature, and it is necessary to quickly cool it to a predetermined temperature before using it for adsorption operation. This is done by passing low-temperature air through it. and,
This heat regeneration and accompanying cooling are performed6.
During the period, the delivery of drying chamber 1 is not carried out during the middle 11i, l, sea urchin,
In addition to installing multiple suction towers (one tower and two towers divided into two)
], while the odor ζ'' is being regenerated or cooled, the adsorption operation is carried out at; It is.

Well, as mentioned above! , l: Like, sucking pine production number, τ The raw material air used is compressed to a predetermined pressure, and the pressure of 1: is 1?
i A Heated at 8i. So, ′:′,
1': By using the raw air of 1' for heat regeneration and effectively utilizing the compression heat possessed by this raw air, heat damage/1.
An air drying device has been proposed that reduces the amount of electricity consumed overnight by heating air in the air.

FIG. 13 shows, for example, the VFl bar of a Song Dynasty air drying apparatus, as disclosed in Japanese Patent Application Laid-Open No. 56-144723.

0.1 in the figure means that the atmosphere is sucked and compressed by 1! 5, Raw material air (・1
), and the output is 1l-7r7, and (2
), [31Jet, internal G; 1 adhesive (20),
(10) are each packed into an IC six absorption tower. , (6) is provided with the switching positions of the solid line and the broken line L in the figure, respectively.
゛Valve V・8, the adsorption tower (force, f'3) is used for the adsorption process. Noi71°i-
+- Crab switching, Slot J month 0 valve. Furthermore, (71,
(81 sets the two cut-off IQ positions shown by solid lines and 6.1 lines in [4) to
Consisting of valves, heat regeneration process and cooling 1. Weighing cut IL)
It is a cut-off IQ valve that performs (9) is l-=evening, flOl
(+3) is the i-nick valve, (11) is the water cooler, and p
) is the primary ・Ra, (12) is the 1×2 missing 1 rubber + 4) is the water-cooled cooler that is in contact with the refrigerator (12a).
Ru.

Next, the operation will be explained. '/I4, If the adsorption operation is performed in the adsorption tower (21, and the adsorption tower (3)
J and t7J switching valve m (a is not shown on the east line, switching position W
i′. In the case of 1:, the blower (1), the raw material air (4) to be sent out, the switching valve (7), the heater (9)
and introduced into one adsorption tower (3) via the switching valve (5). - thermally regenerate the suction (30) in the fl suction tower (3). At the initial stage when the adsorbent (30) has a lot of adsorbed water dispersion, the temperature is 1''7 and 1+, and the heat regeneration time is 1' in the blower (1). The shrinkage for heating is carried out by the heat possessed by the raw material air (4).

:The suction water transfer of i-1 suction agent (30) reached the suction d amount of '1'1111 jt1 sho, and the sea yu ((
The sword is turned on and after 51.1, it is 114'' in -ta (0)
,in! Heat is heated f:'・Raw material 1 (,7J, thermal regeneration is 1 piece, @adhesive (30) 4." only (,:,
Residual @6゛moisture is voice 1? Take it off and get caught.

The feed air 1 containing moisture passes through the switching valve (6) and the -da]-tsuk valve 00).
C + next cooler (+1) 88m introduced i't...'r
, water cooling, ζ! 1, then the secondary cooler < 12 ) (
,, I'm a foreigner) 1゛ζ History C1''Cool, press the button.The main part of this cooling is the - part of the condensed water. ．．．

Pass through the 82nd order -ra (12) 1. The low-temperature raw TL air passes through the switching valve (8) and then the switching valve (8).
6) was passed through again, 214.7 adsorption towers were introduced, and 71 of them were added, 1 (20
) f, , : suction t N '1. -5 is almost completely removed from IL1
71- , l ;・Erection 6 drying ke 1; Tonato), : Pass through exchange valve (5) again 1. IX is discharged to outer can 1 and cut to 9° suction (30)・:Q thermal regeneration completed ”1, then 5],
Place for cooling 2'G:',',:,ha,cut I
θbf f'71, a) Switching a)'l position is changed to the east. , 7 (7) In the case, the raw air sent out from the blower (1,) ←41 i2, switching* (71 to tJ% ”C1
2,* Cooler (11) and secondary 1-pan (12
>! 1"' is introduced and cooled by +7.
Cooling 6-beta suction via J-to-up switching valve (6)? I' is introduced into the i' tower (3), and passed through the interior of this suction fi' tower (3). , 1. Re-cooling. It passes through the adsorbent (3) and the adsorbent (30:1) is heated in the heat chamber (1). (,:: Yes... After passing through evening (9) 1, water cooling cooler (14) 41" = introduced and cooling R1 again.

P+-te, river:, Lυj! After 5), inhale 4 te, introduce into tower (2) 1゛5 wa, and it is completely intestine! ! iii
The air becomes dry and passes through the switching valve +5) a' again.
, ``This is sent out to the outside in the same manner as in the case of 1-, , and thermal regeneration described above.

Adsorbent (3Q) 0) in @r'I- tower mouth), f4+
, regeneration and r, (cooling 1. c end 1.. ?, -, everyone 1
The switching valves [51, [6+] are switched by the broken line (1-), so that the feed air discharged from the lower 7' (1) or 8) is routed through the above-mentioned inner route. It is first introduced into the adsorption tower (,2), and inside the second adsorption tower (72) (1st column, the first (,,'used for adsorption operation)'-5th)
f,: Suction 4 simultaneous 1 (110) heat regeneration: Vt-, cooling is switching valve +7), Hl switching tri, 'p to 1 right! ,
#7, Furthermore, adsorption ヱ;"1 (2) (, bu, ・1 viscosity f'l air 1"t i', fn. (3), an adsorption operation is performed within this adsorption tower (3), and the resulting dry air is sent to the outside via a switching valve (9).

[Problem to be solved by the invention]

As described above, in the conventional air drying apparatus, after the heat regeneration process of one adsorption tower is completed, the adsorbent is cooled by heat exchange with the feed air. Therefore, the adsorbent adsorbs a certain amount of moisture from the feed air during this cooling process, and the effective adsorption capacity in the original adsorption process that starts thereafter is reduced by that amount, resulting in the use of expensive adsorbents. There was a problem that the required amount increased and became uneconomical.

[Means and effects for solving the problems] The air drying device according to the present invention is provided with a circulation blower and a cooler separately,
These and the adsorption tower that has completed the heat regeneration process sequentially form a closed circuit to cool the adsorbent after the heat regeneration.During this time, the feed air is cut off from the closed circuit, and the heat regeneration and subsequent cooling It passes through other adsorption towers that have completed treatment and exits as dry air.

〔Example〕

FIG. 1 is a system diagram showing an air drying apparatus according to an embodiment of the present invention. In FIG.
(30) is an adsorbent, (51 (61 and (7) (81 is a switching valve consisting of a four-way valve and a three-way valve, respectively, as a switching means, (9) is a heater as a heating means, (11) and ( 12) are a primary cooler and a secondary cooler as cooling means, both of which are the same as the conventional ones.

(15) and (+6) are circulation blowers and coolers for heat regeneration cooling, respectively, which are installed in the pipe line communicating between switching valves (7) and (8), and (+7) is a switching means. The automatic two-way valve (+8) is the flow rate adjustment valve.

Next, the operation will be explained. As in the past, we will explain the case where the adsorption tower (2) performs the adsorption process and the adsorption tower (3) performs the heat regeneration process.The switching valves (51 to 8) are all set to the switching position shown by the solid line, and the automatic two-way Raw material air (4) is sent out by the blower (1) with the valve (17) set to the open position.

This raw air (4) is further heated by a heater (9), and
Air at a temperature of 80 to 250° is introduced into the adsorption tower (3) via the switching valves (7) and (5), where the adsorbent (30) is thermally regenerated.

The air containing moisture in this process is introduced into both coolers (11) (+2) through the switching valve +61 B+, where
The condensed water generated as dew is discharged outside the system.The air coming out of the cooler (12) passes through the switching valve (6) again, and the adsorbent (20 ), the moisture is sufficiently adsorbed and taken out as product drying air via the switching valve (5).

When the heat regeneration process in the adsorption tower (3) is completed, the switching valve f7
1 Switch +81 to the switching position shown by the dotted line, and at the same time open the automatic two-way valve (+7). By this, circulation blower (15) - switching valve (8) - switching valve (6) - adsorption tower (3)
- Switching valve (51 - Switching valve (7) - Heat regeneration cooling cooler (
A closed circuit is formed through the path of the circulation blower (15).
The adsorbent (3
0) cooling is performed. While the above cooling is being carried out, the raw air sent out from the blower (1) is controlled by the automatic two-way valve (
17), is cooled by both coolers (Ill (+2)), and after passing through the switching valve (6), it is directly introduced into the adsorption tower (2) without passing through the adsorption tower (3), where it is dried. and is taken out from the switching valve (5).

As described above, the adsorbent (30) is cooled using only the circulating air in the closed circuit as a medium, without using the raw air (a).
The amount of moisture adsorbed by the heat regenerating cooler (16) is extremely small and usually negligible, and the heat regeneration cooling cooler (16) does not require any drain equipment.

When the above cooling process in the adsorption tower (3) is completed, the switching valves (2) and (8) are returned to the original switching positions shown by solid lines, and the switching valves (51+61) are switched to the positions shown by dotted lines at the same time. The valve (17) is closed again. As a result, the adsorption tower (21) is inverted to the thermal regeneration process and the adsorption tower (3) is inverted to the adsorption process. In this case, the adsorbent (30) is inverted as described above. , since the degree of dryness at the end of the thermal regeneration process is maintained almost as it was, the adsorption capacity is almost 100%.
effective, improving adsorption efficiency and economic efficiency.

FIG. 2 shows another embodiment of the present invention.
ε′! ] Mono and Tatsumi Naro are flowing! a blasphemy 4 adjustment (ls9-
) is 1'11λ, and the edge is 1'' (strip circuit (19);
That's qo points. In other words, set the opening degree of the cooling/heating adjustment valve (1) appropriately to 5), and then adjust the feed air (・1) to the valve (1). Heat some of it...
,,,-, Near (91' heated and used for thermal regeneration treatment of τ adsorbent L, remaining original plate (,, K,, Near, circuit (1) passed through, this, 2 C ``1.
? The air is mixed with air and sent to the air cooler (II) (12). At the same time, adsorption treatment R5' is carried out in different absorption towers at the same time:
;q': Playback 17.1. Aiming for temporal coordination regarding reserves 1
, 11 batters yelled at Shun etc.

In addition, each example C described below is a case where two suction units are used *
G (7-y) and explanation j, please change the first stage of the switch appropriately.
゛) This invention also applies at the same time when using adsorption towers of the same number as g';, 411m.
Same effect as j7).

(Effects of the Invention) As shown in J:ノ), in this invention, a circulation blower and a cooler are separately installed,... Closed circuit・rv1+戊I7″ζ
Soji) Suction 6-Sharpening (7) Perform cooling.
':C' of this cooling 1' culm 11. : The adsorbent adsorbs P1 moisture in the raw air, which makes the adsorption capacity of the adsorbent effective (11), improving adsorption efficiency and economical efficiency. 9

[Brief explanation of drawings]

Figure 1 Hani's invention - air dry audience according to embodiment 1-1
A system diagram showing the position, FIG. 2, shows another embodiment of the second invention (
9 shows a similar system [A, Figure 3 shows the air drying equipment at 11 East] [4 and 7]. In the figure (,:, f21(3! is the adsorption tower, (201(
301 is the suction 6, ←1) is the raw material air, (6) or between and (17) are the switching valves 1 and 15, respectively. Heat it up in one step.
(11) and (12) are the cooling'f-stages. ZoiL1 next--ra! j, 1st and 2nd cooler,
(15) is a circulation blower, (16) is a cooler and a cooling cup for heat regeneration at I). In addition, the same symbol in the name l;4 indicates the same or similar or i part.

Claims (1)

[Scope of Claims] A plurality of adsorption towers filled with adsorbent, a heating means, a cooling means, and a switching means for switching the pipes connecting these are provided, and the feed air is heated or cooled and is passed through the adsorption towers. Dry air is continuously obtained by sequentially performing an adsorption treatment in which the moisture contained in the adsorbent is adsorbed by the adsorbent, and a thermal regeneration treatment in which moisture is removed from the adsorbed adsorbent, in each of the adsorption towers. , a circulation blower and a cooler are separately provided, and a closed circuit is sequentially formed between these and the adsorption tower that has undergone the heat regeneration process to cool the adsorbent after the heat regeneration process. Air drying equipment.