Air draft device and hydrochloric acid storage equipment

Abstract

The utility model provides an air draft device and hydrochloric acid storage equipment, the air draft device comprises an air duct, a breather valve, a pressure gauge and a regulating valve, the air duct comprises an air inlet and an air outlet, the air outlet is used for communicating with a waste gas tower, the breather valve comprises a main air port, an expiration port and an inspiration port, the expiration port communicates with the air inlet of the air duct, and the main air port is used for communicating with a liquid storage tank; the pressure meter is installed on the air duct and used for measuring the pressure in the air duct, the adjusting valve is arranged between the exhaust outlet and the waste gas tower, the adjusting valve is in communication connection with the pressure meter, and the adjusting valve can adjust the opening degree in response to the numerical value of the pressure meter so that the pressure in the air duct can be maintained at the preset negative pressure. On one hand, the preset negative pressure is controlled through the pressure meter and the adjusting valve, and the opening pressure of the breather valve can be adjusted more conveniently and accurately; and on the other hand, the opening degree is increased when the pressure is increased, so that the volatile gas can be prevented from being accumulated in the air duct and even escaping.

Description

Technical Field

[0001] The present application relates to the field of hydrochloric acid storage tanks, and in particular to an exhaust device and hydrochloric acid storage equipment. Background Art

[0002] The etching process of PCB boards requires a large amount of hydrochloric acid, which also requires a large amount of hydrochloric acid to be stored. During the unloading and storage of hydrochloric acid, hydrochloric acid mist will emerge due to its strong volatility. If the hydrochloric acid mist is not removed in time, it will seriously corrode the equipment and facilities in the tank area, and its oxidizing properties will also cause some plastic parts to age and become brittle. For this reason, refer to Figure 1 Some early related technologies would install an exhaust hood above the hydrochloric acid storage tank to collect and discharge the generated hydrochloric acid mist. However, the exhaust hood could not guarantee that the hydrochloric acid mist would be extracted in time, and there was a risk of the hydrochloric acid mist escaping to the outside from between the exhaust hood and the hydrochloric acid storage tank.

[0003] There are also some related technologies that choose to skip the exhaust hood and directly connect the hydrochloric acid storage tank with an air duct. However, the pressure in the hydrochloric acid storage tank is not controlled at this time, and the hydrochloric acid is prone to volatilize quickly, resulting in a waste of hydrochloric acid. At the same time, a large amount of hydrochloric acid mist will also increase the load of the downstream exhaust gas treatment system, which will have a negative impact on the production line.

[0004] Other related technologies will add a breathing valve between the air duct and the hydrochloric acid storage tank. The breathing valve puts the hydrochloric acid storage tank in a slightly positive pressure state, thereby inhibiting the volatilization of hydrochloric acid. Only when the pressure exceeds a certain level will the breathing valve open to discharge the hydrochloric acid mist from the air duct, thereby reducing the waste of hydrochloric acid.

[0005] On the one hand, when hydrochloric acid is unloaded, the original liquid in the hydrochloric acid storage tank is impacted by the feed, which will quickly produce a large amount of hydrochloric acid mist, causing the pressure of the hydrochloric acid storage tank to rise sharply. The hydrochloric acid mist entering the air duct cannot be discharged in time and is easy to escape from the air duct into the external environment.

[0006] On the other hand, in some cases, the opening pressure of the breathing valve may be too high, causing hydrochloric acid mist to leak from other interfaces of the hydrochloric acid storage tank before the breathing valve is opened. Since the spring-type breathing valve controls the opening pressure by changing the pre-tightening degree of the spring, and the gravity-type breathing valve controls the opening pressure by changing the weight of the counterweight, the operation is more cumbersome and the adjustment process is not convenient enough. Summary of the invention

[0007] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an exhaust device and a hydrochloric acid storage device, which can reduce the risk of volatile gas escape and simplify the adjustment method of the opening pressure of the breathing valve.

[0008] The exhaust device provided according to the present application includes an air duct, a breathing valve, a pressure gauge and a regulating valve, the air duct includes an air inlet and an air outlet, the air outlet is used to connect to an exhaust tower, the breathing valve includes a main air port, an exhalation port and an inhalation port, the exhalation port is connected to the air inlet of the air duct, the main air port is used to connect to a liquid storage tank, the pressure gauge is installed on the air duct, the pressure gauge is used to measure the pressure in the air duct, the regulating valve is arranged between the air outlet and the exhaust tower, the regulating valve is communicatively connected to the pressure gauge, and the regulating valve can adjust the opening in response to the numerical value of the pressure gauge to maintain the pressure in the air duct at a preset negative pressure.

[0009] According to the exhaust device provided in the present application, at least the following technical effects are achieved: the air duct generates negative pressure through the action of the downstream exhaust tower, and the regulating valve stabilizes the negative pressure of the air duct at a preset negative pressure. On the one hand, the preset negative pressure is controlled by the pressure gauge and the regulating valve, so that the opening pressure of the breathing valve can be adjusted more conveniently and accurately, eliminating the process of operating the breathing valve; on the other hand, by increasing the opening when the pressure increases, the exhaust capacity of the air duct can be improved, so that volatile gases can be discharged quickly, avoiding accumulation in the air duct or even escape. Therefore, the exhaust device can reduce the risk of volatile gas escape, while simplifying the adjustment method of the opening pressure of the breathing valve.

[0010] According to some embodiments of the present application, the breathing valve includes a main chamber, an exhalation chamber and an inhalation chamber, and the breathing valve also includes a first valve body and a second valve body, the first valve body is arranged between the exhalation chamber and the main chamber, and the first valve body can be opened to the exhalation chamber side, the second valve body is arranged between the inhalation chamber and the main chamber, and the second valve body can be opened to the main chamber side.

[0011] According to some embodiments of the present application, the first valve body includes a first valve cover and a first valve stem, the second valve body includes a second valve cover and a second valve stem, the first valve stem is fixedly mounted on the first valve cover, the exhalation chamber is formed with a first guide groove extending vertically downward, the first valve stem is inserted into the first guide groove, the first valve stem is formed with a second guide groove extending vertically downward, the second valve stem is fixedly mounted on the second valve cover, and the second valve stem is inserted into the second guide groove.

[0012] According to some embodiments of the present application, the air duct has a plurality of air inlets, and the air exhaust device further includes an air valve, which is arranged between the exhalation port and the air inlet to balance the wind pressure of each air inlet.

[0013] According to some embodiments of the present application, the exhaust device also includes a dry-wet separator, which is arranged between the exhaust port and the exhaust tower, and the dry-wet separator includes a drain pipe located at the bottom, and the drain pipe is used to connect to the liquid storage tank.

[0014] According to some embodiments of the present application, the dry-wet separator includes a first separation chamber, in which a cold coil is coiled, and the cold coil is used to communicate with a cold source.

[0015] According to some embodiments of the present application, the dry-wet separator also includes a second separation chamber, which is arranged downstream of the first separation chamber. The gas discharged from the exhaust port passes through the first separation chamber and the second separation chamber in sequence and is sent to the exhaust gas tower. The bottom of the second separation chamber is connected to the first separation chamber, and the second separation chamber is filled with a demisting ball.

[0016] According to some embodiments of the present application, the regulating valve is arranged downstream of the dry-wet separator, and the regulating valve adopts a proportional-integral electric regulating valve.

[0017] According to some embodiments of the present application, the pressure gauge is installed at one end of the air duct close to the exhaust port, and the pressure gauge is a diaphragm negative pressure gauge with a PVDF diaphragm.

[0018] The hydrochloric acid storage equipment provided in the present application includes a hydrochloric acid storage tank and the exhaust device provided in the present application.

[0019] The hydrochloric acid storage equipment provided in the present application includes the exhaust device provided in the present application, and therefore has the corresponding beneficial effects provided by the exhaust device, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of some hydrochloric acid storage equipment in the related art;

[0022] Figure 2 is a schematic structural diagram of a hydrochloric acid storage device according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the structure of the breathing valve of an embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the structure of the dry-wet separator of an embodiment of the present application.

[0025] Reference numerals:

[0026] Air duct 110, breathing valve 120, first valve cover 121, first valve stem 122, second valve cover 123, second valve stem 124, main air port 125, exhalation port 126, inhalation port 127, pressure gauge 130, regulating valve 140, dry-wet separator 150, defogger ball 151, cold coil 152, drain pipe 153, air valve 160,

[0027] Liquid storage tank 900. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present application, it should be understood that descriptions involving orientation, such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0032] The etching process of PCB boards requires a large amount of hydrochloric acid, which is stored in a hydrochloric acid storage device. The hydrochloric acid storage device includes a hydrochloric acid storage tank and an exhaust device installed together with the hydrochloric acid storage tank. The exhaust device is connected to the exhaust tower to obtain negative pressure and discharge the generated hydrochloric acid mist.

[0033] For the exhaust device with the air duct directly connected to the hydrochloric acid storage tank, the air duct will promote the discharge of the hydrochloric acid mist inside the hydrochloric acid storage tank, thereby causing the concentration of the hydrochloric acid mist inside the hydrochloric acid storage tank to decrease, promoting the volatilization of the hydrochloric acid mist, causing the loss of hydrochloric acid and increasing the waste gas treatment load.

[0034] Regarding the solution of adding a breathing valve, since in the relevant technology, the flow rate of the exhaust device remains roughly stable, when the hydrochloric acid is unloaded, the large amount of hydrochloric acid mist suddenly generated is likely to exceed the instantaneous processing capacity of the exhaust device, resulting in the hydrochloric acid mist being unable to be discharged in time, resulting in the problem of short-term accumulation of hydrochloric acid mist in the exhaust device or even escaping to the outside.

[0035] In addition, the exhaust device also has the problem that the adjustment operation of the breathing valve is relatively complicated.

[0036] To this end, the present application provides an exhaust device, referring to Figure 2 and Figure 3 According to an embodiment of the present application, the exhaust device includes an air duct 110, a breathing valve 120, a pressure gauge 130 and a regulating valve 140.

[0037] The air duct 110 includes an air inlet and an air outlet, the air outlet is used to connect to the exhaust tower, the breathing valve 120 includes a main air inlet 125, an exhalation port 126 and an inhalation port 127, the exhalation port 126 is connected to the air inlet of the air duct, and the main air inlet 125 is used to connect to the liquid storage tank 900.

[0038] The pressure gauge 130 is installed on the air duct 110, and the pressure gauge 130 is used to measure the pressure in the air duct 110. The regulating valve 140 is arranged between the exhaust port and the exhaust tower, and the regulating valve 140 is communicatively connected with the pressure gauge 130. The regulating valve 140 can adjust the opening in response to the value of the pressure gauge 130, so that the pressure in the air duct 110 is maintained at a preset negative pressure.

[0039] The air duct 110 generates negative pressure through the action of the downstream exhaust tower, and the regulating valve 140 stabilizes the negative pressure of the air duct 110 at a preset negative pressure. On the one hand, the preset negative pressure is controlled by the pressure gauge 130 and the regulating valve 140, so that the opening pressure of the breathing valve 120 can be adjusted more conveniently and accurately, eliminating the process of operating the breathing valve 120; on the other hand, by increasing the opening when the pressure increases, the exhaust capacity of the air duct 110 can be improved, so that volatile gases can be discharged quickly, avoiding accumulation in the air duct 110 or even escape. Therefore, the exhaust device can reduce the risk of volatile gas escape, while simplifying the adjustment method of the opening pressure of the breathing valve 120.

[0040] It is understandable that the exhaust device can be applied to hydrochloric acid storage equipment, that is, the liquid storage tank 900 is a hydrochloric acid storage tank, or the exhaust device can also be used in combination with a liquid storage tank 900 storing other volatile gases.

[0041] The regulating valve 140 can respond to the value of the pressure gauge 130 through a built-in or external control module. Optionally, in some embodiments, the control module can pre-establish a data table that reflects the mapping relationship between the value of the pressure gauge 130 and the opening of the regulating valve 140, and control the action of the regulating valve 140 according to the result of the table lookup, thereby achieving response. Alternatively, in some embodiments, the control module can also establish a conversion function to obtain and output the opening of the regulating valve by calculating the input value of the pressure gauge 130.

[0042] Exemplarily, in some embodiments, the regulating valve 140 adopts a proportional-integral electric regulating valve, which has a built-in control module. The control module has an amplifying circuit. When in use, the pressure gauge 130 senses the change in pressure, thereby outputting a corresponding electrical signal to the regulating valve 140. The amplifying circuit performs proportional-integral amplification processing on the input electrical signal, thereby outputting a control signal to the motor to control the movement of the motor to change the opening of the proportional-integral electric regulating valve.

[0043] Based on the same principle, the regulating valve 140 can also respond to the pressure gauge 130 in other ways, which will not be described in detail here.

[0044] The breathing valve 120 can use the breathing valve 120 commonly used in the relevant technology, such as a gravity breathing valve, a spring breathing valve, a pilot breathing valve, etc. In some embodiments, the breathing valve 120 includes a main chamber, an exhalation chamber and an inhalation chamber. The breathing valve also includes a first valve body and a second valve body. The first valve body is arranged between the exhalation chamber and the main chamber, and the first valve body can be opened to the exhalation chamber side. The second valve body is arranged between the inhalation chamber and the main chamber, and the second valve body can be opened to the main chamber side.

[0045] In addition, the main chamber is connected to the liquid storage tank 900, the main gas port 125 is located in the main chamber, the exhalation port 126 is located in the exhalation cavity, and the inhalation port 127 is located in the inhalation cavity. When the pressure in the liquid storage tank 900 is lower than the preset range, the breathing valve 120 is in the inhalation state, the pressure difference between the main chamber and the inhalation cavity causes the second valve body to open, and the pressure difference between the main chamber and the exhalation cavity causes the first valve body to close, so that the gas can enter from the inhalation port 127 and be sent to the liquid storage tank 900; when the pressure in the liquid storage tank 900 is higher than the preset range, the breathing valve 120 is in the exhalation state, the pressure difference between the main chamber and the exhalation cavity causes the first valve body to open, and the pressure difference between the main chamber and the inhalation cavity causes the second valve body to close, so that the gas can be sent out from the liquid storage tank 900 and discharged to the air duct 110 through the exhalation port 126.

[0046] For example, in some embodiments, referring to Figure 3The breathing valve 120 is a gravity-type breathing valve. The first valve body includes a first valve cover 121 and a first valve stem 122. The second valve body includes a second valve cover 123 and a second valve stem 124. The first valve stem 122 is fixedly mounted on the first valve cover 121. The exhalation cavity is formed with a first guide groove extending vertically downward. The first valve stem 122 is inserted into the first guide groove. The first valve body is formed with a second guide groove extending vertically downward along the first valve stem 122 and passing through the first valve cover 121. The second valve stem 124 is fixedly mounted on the second valve cover 123. The second valve stem 124 is inserted into the second guide groove.

[0047] That is to say, at this time the first valve body is located above the second valve body, and the first valve body and the second valve body realize the function of separating or opening the chamber through gravity, the first valve cover 121 and the second valve cover 123 are used to block the connecting ports between the chambers, and the first valve stem 122 and the second valve stem 124 are respectively used to guide the movement of the first valve body and the second valve body.

[0048] Optionally, in some embodiments, the pressure gauge 130 may be installed at one end of the air duct 110 close to the exhaust port, so that the pressure gauge 130 can be positioned as close to the regulating valve 140 as possible to reduce interference that may be caused by flow resistance. Figure 1 In some embodiments, the probe of the pressure gauge 130 is installed on the air duct 110 obliquely downward, and the probe faces the exhaust port side.

[0049] In addition, the pressure gauge 130 may be a diaphragm negative pressure gauge having a PVDF diaphragm, or a pressure gauge 130 of other specifications.

[0050] It should be pointed out that in actual use scenarios, one exhaust device is often responsible for exhausting multiple liquid storage tanks 900. Due to pressure loss caused by factors such as flow resistance, the negative pressures on the breathing valves 120 on different liquid storage tanks 900 may be different, making it difficult to adjust the opening pressures of different breathing valves 120 to be consistent. To this end, in some embodiments, the air duct 110 has multiple air inlets, and the exhaust device further includes an air valve 160, which is arranged between the exhalation port and the air inlet to balance the wind pressure of each air inlet.

[0051] In some embodiments, the exhaust device further includes a dry-wet separator 150 , which is disposed between the exhaust port and the exhaust tower. The dry-wet separator 150 includes a drain pipe 153 at the bottom, which is used to connect to the liquid storage tank 900 .

[0052] The dry-wet separator 150 is used to recover a portion of the volatile gas (such as hydrochloric acid mist) carried in the air flow, and send it back to the liquid storage tank 900 through the drain pipe 153, so as to avoid the volatile gas being sent to the exhaust tower and causing waste.

[0053] The dry-wet separator 150 can recover volatile gases in different ways. For example, in some embodiments, the dry-wet separator 150 includes a first separation chamber, in which a cold coil 152 is coiled, and the cold coil 152 is used to communicate with a cold source. The cold source provides a refrigerant, and the refrigerant flows through the cold coil 152 from top to bottom. The cold coil 152 and the volatile gases flowing through the first separation chamber undergo heat exchange, so that part of the volatile gases condense into liquid dripping, and are finally collected and recovered by the drain pipe 153 at the bottom.

[0054] In other embodiments, the dry-wet separator 150 may include a second separation chamber and a demister ball 151, and the second separation chamber is filled with the demister ball 151. In this way, when the volatile gas flowing through the second separation chamber collides with the demister ball 151, it will also converge and turn into liquid drops.

[0055] It can be understood that the cold coil 152 and the defogger ball 151 can be used in combination. For example, in some embodiments, the second separation chamber is arranged downstream of the first separation chamber, and the gas discharged from the exhaust port is sent to the exhaust tower through the first separation chamber and the second separation chamber in sequence. The bottom of the second separation chamber is connected to the first separation chamber. At this time, a part of the condensed liquid continues to rise into the second separation chamber under the drive of the airflow, and is blocked by the defogger ball 151, thereby losing the upward momentum and gathering and dripping on the defogger ball 151, thereby producing a better volatile gas recovery effect after combined use.

[0056] Of course, the dry-wet separator 150 can also achieve dry-wet separation in other ways, which will not be elaborated here.

[0057] When the dry-wet separator 150 is provided, the regulating valve 140 may be disposed downstream of the dry-wet separator 150 .

[0058] The present application also provides a hydrochloric acid storage device, which includes a hydrochloric acid storage tank and the exhaust device of the present application. The hydrochloric acid storage device correspondingly has the beneficial effects provided by the exhaust device, which will not be repeated here.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part described as a larger operation is performed independently.

[0061] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A ventilation device, characterized in that: include: An air duct, the air duct comprising an air inlet and an air outlet, the air outlet being used to connect to an exhaust tower; A breathing valve, the breathing valve comprising a main air port, an exhalation port and an inhalation port, the exhalation port being connected to an air inlet of the air duct, and the main air port being used to connect to a liquid storage tank; A pressure gauge, the pressure gauge is installed on the air duct, and the pressure gauge is used to measure the pressure in the air duct; A regulating valve is arranged between the exhaust port and the exhaust tower, and the regulating valve is communicatively connected with the pressure gauge. The regulating valve can increase or decrease the opening in response to the value of the pressure gauge being greater than or less than a preset negative pressure, so as to maintain the pressure in the air duct at a preset negative pressure.

2. The exhaust device according to claim 1, characterized in that: The breathing valve includes a main chamber, an exhalation chamber and an inhalation chamber, and the breathing valve also includes a first valve body and a second valve body, the first valve body is arranged between the exhalation chamber and the main chamber, and the first valve body can be opened to the exhalation chamber side, the second valve body is arranged between the inhalation chamber and the main chamber, and the second valve body can be opened to the main chamber side.

3. The exhaust device according to claim 2, characterized in that: The first valve body includes a first valve cover and a first valve stem, the second valve body includes a second valve cover and a second valve stem, the first valve stem is fixedly mounted on the first valve cover, the exhalation cavity is formed with a first guide groove extending vertically downward, the first valve stem is penetrated in the first guide groove, the first valve body is formed with a second guide groove extending vertically downward along the first valve stem and penetrating the first valve cover, the second valve stem is fixedly mounted on the second valve cover, and the second valve stem is penetrated in the second guide groove.

4. The exhaust device according to claim 1, characterized in that: The air duct has a plurality of air inlets, and the air exhaust device further comprises an air valve, which is arranged between the exhalation port and the air inlet to balance the wind pressure of each air inlet.

5. The exhaust device according to claim 1, characterized in that: The exhaust device also includes a dry-wet separator, which is arranged between the exhaust port and the exhaust tower. The dry-wet separator includes a drain pipe located at the bottom, and the drain pipe is used to connect to the liquid storage tank.

6. The exhaust device according to claim 5, characterized in that: The dry-wet separator comprises a first separation chamber in which a cold coil is coiled. The cold coil is used to communicate with a cold source.

7. The exhaust device according to claim 6, characterized in that: The dry-wet separator also includes a second separation chamber, which is arranged downstream of the first separation chamber. The gas discharged from the exhaust port passes through the first separation chamber and the second separation chamber in sequence and is sent to the exhaust tower. The bottom of the second separation chamber is connected to the first separation chamber, and the second separation chamber is filled with a demisting ball.

8. The exhaust device according to claim 7, characterized in that: The regulating valve is arranged downstream of the dry-wet separator, and the regulating valve is a proportional-integral electric regulating valve.

9. The exhaust device according to claim 1, characterized in that: The pressure gauge is installed at one end of the air duct close to the air outlet, and the pressure gauge is a diaphragm negative pressure gauge with a PVDF diaphragm.

10. A hydrochloric acid storage device, characterized in that: The hydrochloric acid storage equipment comprises a hydrochloric acid storage tank and the exhaust device according to any one of claims 1 to 9.

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