JP2002028591A - Pickling apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and method capable of keeping a relative humidity in a housing suitable for a pickling method without a large investment nor using excess of external energy. SOLUTION: In a method for operating a pickling apparatus (2) provided in the housing in a hole (1), at least one pickling container (3) and a blower 7 for sending air (L0) to an air cleaner (6) from the hole (1) through the pickling apparatus (2) provided in the housing are provided. At least a part (L3) of air streams (L1, L1', L1") supplied to the pickling apparatus (2) provided in the housing is preheated and at least the greater part of energy necessary for preheating originates from waste heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus and a method for pickling housed in a housing.

[0002]

2. Description of the Related Art Pickling apparatuses of this kind are described, for example, in Austrian Utility Model Registration Nos. 2670 and 267.
No. 1 is well known and basically produces results.

FIG. 1 shows an example of a conventional apparatus.

[0004] The drawing suggests a factory hall (formed of a partitioned space) as a balance boundary in the form of a plane surrounded by a chain line, in which the original storage housing surrounded by a solid line is shown. 2 are provided. Inside the storage housing there are individual pickling vessels 3 which are lowered to the bottom of the storage housing 2 but are placed in the basement 4 with some opening for inspection and monitoring purposes. Have been. The drawing shows winter conditions, in which the temperature conditions reaching the dew point are particularly disadvantageous.

As can be seen from FIG. 1, air L0 is blown from the hole 1 into the receiving housing 2 at reduced pressure, heated, humidified and acts to create a negative pressure. 5 and is supplied to an air scrubber 6 which is often outside the hall 1.

Usually, the hole temperature T0 is 10 ° C. and the relative humidity ψ is 70%. 4 per hour as air volume TL0
When 0000 kg of dry air passes, the usual high acid temperature, the acid circulation caused by immersing the object to be pickled, the large surface wetted by the liquid of the object to be treated, About 800 per hour
kg of water will evaporate from the pickling vessel 3, which means that when the air L2 discharged on average is at a temperature of 25 ° C., the relative humidity will be calculated to be 125% and therefore the fog will be reduced. appear. This fog is detrimental to the quality of the pickled object and is desirably avoided.

[0007]

That is, it has been found that a drawback of the pickling apparatus housed in a housing of this kind is that the individual pickling containers undergo severe evaporation and the water vapor is very high. As a result, the saturation point of the air inside the storage housing is often exceeded.

This is not a major problem in the case of an open pickling apparatus, since a large air volume can be used and strong air movements occur in the holes according to the temperature gradient. Sufficient ventilation can be provided in the area of the washing container to avoid the above difficulties.

[0009] However, with the accommodating of the pickling container in the housing, the air flow for supplying the generated steam to the air purifier is reduced to a value comparable to that of an open type pickling apparatus not housed in the housing. When the flow rate is increased, on the one hand, the problem arises that the output of the blower must be increased sufficiently and, on the other hand, the air cleaner must be correspondingly enlarged.

An object of the present invention is to eliminate the above-mentioned drawbacks and to maintain the relative humidity inside the storage housing at a value suitable for the pickling method, and to do so with a disproportionately large investment or large amounts of external energy. An object of the present invention is to provide an apparatus or a method that does not require use.

[0011]

SUMMARY OF THE INVENTION In accordance with the present invention, it is an object of the present invention to provide a pre-heated air flow to a storage housing wherein at least a majority of the energy required for pre-heating is derived from waste heat. Achieved by:

The configuration of the present invention is as follows.

1. A method for operating a pickling device stored in a storage housing (2) in a hall (1), the pickling device having at least one pickling container (3) stored in the storage housing (2). And a blower (7) for sending air (L0) through the pickling device to the air washer (6), wherein the air flow supplied to the storage housing (2) of the pickling device is provided. L1, L
1 ′, L1 ″) at least partially (L3), and at least a majority of the energy required for the preheating is derived from waste heat.

2. The air flow (L2) coming out of the storage housing (2) of the pickling device is passed through a heat exchanger (7),
On the other hand, this heat exchanger (7) has a storage housing (2)
(L3) of the air flow (L1) supplied to the
2. The method according to claim 1, wherein the air stream is heated by waste heat.

3. A part of at least one pickling vessel (3) is a pickling device housed in a basement (4) of a storage housing (2), the air flow supplied to the storage housing (2) of the pickling device; At least a part of (L1 ′, L1 ″) is passed through a basement (4) separated from the storage housing (2), and is heated by waste heat of the basement (4). Item 2. The method according to item 1.

4. The air flow (L2) emerging from the storage housing (2) of the pickling device is passed through a heat exchanger (7), on the other hand, by means of the heat exchanger (7).
The air flow (L0) generated by the blower (8) is heated inside the hole (1) having a hole, and the air flow raises the temperature in the hole communicating with the basement (4). The method described in the section.

5. 3. Apparatus for carrying out the method according to claim 2, wherein an air stream (L2) emerging from the storage housing (2) of the pickling apparatus is provided with a heat exchanger (7) before the blower (5). The heat exchanger (7) is provided on the other hand with the storage housing storage (2).
The air flow (L0-L3-L1) flowing into the device is arranged to pass therethrough.

6. 4. Apparatus for performing the method according to claim 3, wherein at least a part of the air flow (L0, L1 ') supplied to the storage housing (2) of the pickling device comprises:
An apparatus characterized by having a flow passage configured to pass through the basement (4) of the storage housing (2).

[7] The air flow (L2) coming out of the storage housing (2) of the pickling device is led to a heat exchanger (7) provided in front of the air washer (6), which is connected to the other side. The air (L) in the hall (1) is blown by the blower (8).
0) is passed through, then heated and then again hole (1)
7. The device according to claim 6, wherein the air is blown into the inside.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a first embodiment according to the present invention.

Each of the drawings below suggests a factory hall as a balance boundary in the form of a plane surrounded by a chain line, in which an original storage housing 2 surrounded by a solid line is provided. Inside the storage housing 2 there are individual pickling containers 3 which have been lowered to the bottom of the storage housing 2 but are slightly open in the basement 4 for inspection and monitoring purposes. Are located. Each drawing shows a state in winter, where the temperature condition reaching the dew point is particularly disadvantageous.

The air L1 sent to the storage housing 2
Is heated in the heat exchanger 7 by the air L2 discharged from the storage housing 2 (the reference numeral L2 'is attached after the heat exchanger).

As a result, the air flow L1 reaching the inside of the housing 2, which is composed of the air flow L0 (temperature 10 ° C.) and the heated air flow L3, is particularly at a temperature of 15 ° C. and a relative humidity of about 50%. And will have. For this reason, the humidity of the discharged air L2 is suppressed to 99%, and the air L2 is prevented from falling below the dew point. At this time, if it is desired to reduce the relative humidity more strongly to increase the certainty of preventing the temperature from falling below the dew point, the partial air having more air L1 flowing into the storage housing 2 by a larger heat exchanger is required. Style L
3 can be preheated to obtain a correspondingly high degree of certainty, but in that case a more powerful blower is also required.

The configuration, conditions, and the like other than those described above are the same as those described with reference to FIG. 1, and a description thereof will not be repeated.

Referring now to FIG. 3, another advantageous embodiment of the present invention is shown.

In this case, since the temperature of the acid solution is high in the basement room 2 of the storage housing 2 in which the individual pickling containers 3 are provided (but separated from the storage housing 2), a high temperature is maintained. Takes advantage of the fact that this temperature warms the air passed through the basement 2 accordingly.

In the illustrated example, the hall air L0 (air flow L1 ′) at 10 ° C. to 18 ° C. is passed through the basement 2,
As a result, the air is heated and the relative humidity is reduced to 42%, so that the air has a relative humidity of 88% at the outlet of the air flow L2 even after passing through the storage housing 2, and therefore operates even in the case of rush work. Even taking into account that irregular factors always occur therein, it is definitely 100% or less, that is, it is always clearly above the dew point.

FIG. 4 shows still another embodiment.

Here, the second blower 8 is used, but particularly excellent results can be obtained. In this variation, the hole air L0 originating from the hole region having a relatively low temperature of about 10 ° C. is sucked by the blower 8, conveyed through the heat exchanger 7, heated at that time, and then formed as the air flow L0 ′. It is blown to the hall again.

In this way, about 1
A temperature of 2 ° C. is obtained, which is also the initial temperature of the airflow L0 ″, and this airflow is
, And is heated to L1 ″ and passed through the storage housing 2.

As the temperature of the inflow into the basement 4 increases,
A further reduction in the relative humidity when entering the storage housing 2 can be obtained, and thus the humidity at the outlet of the air flow L2 exiting the storage housing 2 is also significantly reduced, ie of the order of 79%.

The temperature raised to 33 ° C. at this point increases the efficiency of the heat exchanger 7 as compared with the case of operating in each of the above-described examples, so that the investment scale can be saved in this case. As with all the other examples, the blower or blower 5 only has an assumed air volume of 40,000 kg (converted to dry air) per hour, and does not need to be installed more strongly than the other examples.

In the embodiment shown in FIG. 4, a rise in the temperature inside the hall is obtained, which is favorable for the working climate and gives more certainty in the storage housing 2 against falling below the dew point, with which The main object of the present invention is achieved.

The separation of the blowers 5 and 8 makes it possible to easily take into account frequently changing work and environmental parameters without producing undesirable feedback or side effects. Whether the heat exchanger 7 is arranged before or after each blower 5 to 8 is easily determined by those skilled in the field of fluid engineering and thermal engineering according to the knowledge of the present invention and the use cases. be able to.

It should be noted that, in any of the above embodiments, it is assumed that water evaporates at a rate of 800 kg / h in the housing, which is different from the temperature and humidity of the air flow passed through the housing. Is not involved. In addition,
In each figure, X0, Xe, X1, X2, X3, etc. represent pressures (gauge pressure, negative pressure).

To add to the selected illustration, the amount of air delivered through the balance boundary (from hole 1 to air washer 6) appears to be uncompensated. This is because no air is supplied to the hole 1 in the drawing. This loss is simply compensated by the usual factory halls having various unsealed areas in the roof area, window area, doors and entry areas, and of course by the ventilation of the hall itself, so in the drawings especially Not shown.

In the embodiment of FIG. 4 described last, while the temperature of the air flow L0 sucked by the blower 8 is set to 10 ° C., the general hole temperature (L
(Corresponding to 0 ″) is set at 12 ° C. This is because such suction processes are usually performed in the clean air supply area, i.e. near the walls of the halls or frequently opened doors, whereas the air leaving at 18 DEG C. advantageously requires a higher temperature. This is because they are passed through a hall area where a higher temperature is required than in a hall area where manual work is performed because, for example, administrative work is performed.

The present invention is not limited to the illustrated and described embodiments, but can be modified and modified in various forms. For example, it is possible to heat the air entering the storage housing using external energy (primary energy) to a limited extent, but only in a special case.

How the air reaches the storage housing is already known from the prior art and is not directly questioned by the present invention. This makes it possible or easy to retrofit existing equipment with the device according to the invention in order to be able to work in the method according to the invention. It should be further noted that the air washer is often located outside the hall, but it is not necessary. Even if the air washer is installed inside the hall, the position of the air washer has no influence on the method of the present invention as long as the exhaust gas to the outside is filtered.

The blower 8 is arranged in each case so as to create a negative pressure inside the storage housing and to prevent pickling steam from coming out of the housing (a gate to allow pickling material to enter). When you open it). Of course, this has no effect on the method according to the invention, and it is possible to carry out the method according to the invention, even if the blower is arranged in front of the storage housing. As the blower, those of various types usually used in the pickling technique can be used.

The term "waste heat" should be understood in this specification and in the claims to refer primarily to the waste heat of the pickling process, but at least the acid stored in the housing. Any other waste heat generated in the hall where the washing device is located can be automatically utilized by aspirating the hall air during the process of the present invention, or can be utilized by proper aspiration. It is obvious to those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the prior art.

FIG. 2 is a schematic diagram of a first embodiment according to the present invention.

FIG. 3 is a schematic view of the second embodiment.

FIG. 4 is a schematic diagram of a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hall 2 Storage housing 3 Pickling container 4 Basement room 5 Blower 6 Air purifier 7 Heat exchanger 8 Blower

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B201 BB02 BB82 BB96 CA03 CD02 3L058 BE08 BG05

Claims (7)

[Claims] 1. A method for operating a pickling apparatus stored in a storage housing (2) in a hall (1), wherein at least one pickling container (3) is stored in the storage housing (2). And a blower (7) for sending air (L0) through the pickling device to the air cleaner (6) through the pickling device. Air flow (L1, L
1 ′, L1 ″) at least partially (L3), and at least a majority of the energy required for the preheating is derived from waste heat. 2. The air stream (L2) emerging from the storage housing (2) of the pickling device is passed through a heat exchanger (7), while the heat exchanger (7) is provided with a storage housing (2). The method according to claim 1, characterized in that at least a part (L3) of the air stream (L1) supplied to the air is passed through and the air stream is heated by waste heat. 3. A pickling apparatus wherein a part of at least one pickling vessel (3) is housed in a basement (4) of a housing (2), wherein the housing (2) of the pickling apparatus is provided in the pickling apparatus. At least a part of the supplied air flow (L1 ′, L1 ″) is passed through a basement (4) separated from the storage housing (2) and heated by waste heat of the basement (4). The method of claim 1, wherein: 4. The air stream (L2) leaving the storage housing (2) of the pickling device is passed through a heat exchanger (7), on the other hand by means of this heat exchanger (7). 4. An air flow (L0) generated by a blower (8) inside a certain hall (1) is heated, and this air flow increases the temperature in the hall communicating with the basement (4). The method described in. 5. An apparatus for carrying out the method according to claim 2, wherein the air flow (L2) emerging from the storage housing (2) of the pickling device is heat-exchanged before the blower (5). The heat exchanger (7) is arranged such that the air flow (L0-L3-L1) flowing into the storage housing storage (2) on the other hand passes through the heat exchanger (7). An apparatus characterized in that: 6. Apparatus for carrying out the method according to claim 3, wherein at least a part of the air flow (L0, L1 ') supplied to the storage housing (2) of the pickling device is a storage housing. An apparatus characterized in that the flow path is configured to pass through the basement (4) of (2). 7. An air flow (L2) coming out of the storage housing (2) of the pickling device is led to a heat exchanger (7) provided in front of the air washer (6). On the other hand, the air (L0) in the hall (1) is blown by the blower (8).
7. The apparatus according to claim 6, wherein the air is heated and then blown back into the hall (1).