JP2005075391A - Intake and exhaust device for tank, and tank equipped with the intake and exhaust device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation-type intake and exhaust device 30 which can make use of a conventional one intake and exhaust port of a tank, separates an intake port 33 from an exhaust port 34, and can effectively exhaust unnecessary components of a generated gas while preventing a pressurized state and a depressurized state of the gas GS in the tank by an exhaust device of the tank 1 for sucking the unnecessary components of the generated gas and the atmosphere AR by a forced-exhaust device 3 such as an exhaust fan and a gas suction machine. <P>SOLUTION: The intake port 33 and the exhaust port 34 are provided. When the gas GS in the tank is pressurized, exhaust gas components are exhausted by the forced-exhaust device 3 from the exhaust port 34. When the gas GS in the tank is depressurized, intake gas components are sucked from the intake port 33. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention prevents the inside of the tank from being in a pressurized state or a negative pressure state, and exhausts the liquid volatile component of the tank, the gas generated during fermentation, the evaporated component, etc., and the outside air such as the atmosphere (hereinafter referred to as the atmosphere AR) This relates to an intake / exhaust device provided with an intake / exhaust port for intake of gas components mainly.

  A large number of tanks (hereinafter referred to as tank 1) are used in various fields such as storage of liquid, especially fermentation of brewed products, depending on various applications. As shown in FIG. 4 to be described later, in these tanks 1, in order to prevent occurrence of a pressurized state and a negative pressure state of the gas GS in the tank, a so-called gas component mainly composed of the atmospheric air AR is generally provided. An air vent that makes the suction action and the exhaust action of the gasified components such as the volatile component of the liquid in the tank, the gas generated during fermentation, and the evaporation component function in the same intake / exhaust port 21 (hereinafter referred to as the intake / exhaust port 21). Is installed).

  However, the intake / exhaust port 21 is an integrated intake / exhaust device 20 in which the intake / exhaust port 21 is installed in the upper part of the tank 1 to prevent rain and contamination.

  In the integrated intake / exhaust device 20 provided with this type of intake / exhaust port 21, when the gas GS in the tank becomes negative pressure, the atmosphere AR, the dehumidified atmosphere AR, the odor eliminating agent, the volatile evaporation component are naturally circulated from the inside of the tank. A gas component (hereinafter referred to as an inhaled gas component) GS1 having an atmosphere AR as a living body such as a gas in which a necessary chemical component is mixed in a tank such as a chemical reaction inhibitor is inhaled.

  Next, when the gas GS in the tank is in a pressurized state due to generation of gasified components (hereinafter referred to as exhaust gas components) G32 such as volatile components of the liquid in the tank, gases generated during the fermentation, and evaporated components, the inside of the tank The exhaust gas component G32 is discharged to the outside. In this case, the discharged exhaust gas component G32 may become pollution such as odor and air pollution.

  FIG. 4 shows a gas component intake / exhaust flow in a conventional tank in which the suction action for sucking the suction gas component GS1 as the in-tank gas GS and the exhaust action of the exhaust gas component G32 are functioning at the same inlet / outlet port 21. FIG.

  In the figure, an integrated intake / exhaust device 20 is attached to a tank opening 1 a at the top of the tank 1. As shown in the figure, the intake / exhaust port 21 allows the suction action and the exhaust action to function with the same components.

[Prior art 1]
In the [Configuration] of [Abstract] of the name of the invention of the prior art 1 (see Patent Document 1) “Automatic adjustment device for pressure in pneumatic vessel”, “set pressure value (Ps) and detected pressure value (Pi)” The pressure in the pneumatic container (Pc) is adjusted while controlling the pressure adjusting means (16) disposed between the high pressure air source (5) and the pneumatic container (2S). In the pneumatic pressure vessel automatic adjustment device having the configuration, the pressure adjusting means (16) is formed by connecting a large capacity ON-OFF solenoid valve (17) and a small capacity voltage regulator (18) in parallel. The pressure (Pc) in the pneumatic container (2S) is rapidly increased using the ON-OFF solenoid valve (17) until a preset switching pressure value (Pα) equal to or lower than the pressure value (Ps) is reached. In addition, both (17. so as to perform high-precision pressure regulation using the electropneumatic regulator (18) after reaching. Structure in which a pressure adjustment control means for automatically adjusting (20) switches the 8) "is described.

  The “effect of the invention” of the prior art 1 includes “a pressure adjusting means formed by connecting a large-capacity ON-OFF solenoid valve and a small-capacity electropneumatic regulator in parallel. Until the switch pressure value is reached, the ON-OFF solenoid valve is used to rapidly increase the pressure in the pneumatic vessel, and after reaching the pressure regulator, the voltage regulator is used to switch between the two so that the pressure is accurately regulated. Since the pressure adjustment control means to adjust is provided, the pressure in the pneumatic container can be rapidly increased and controlled to the set pressure value with high accuracy, and it can be handled with less air consumption. It's easy. "

  As described above, the prior art 1 uses a pressure adjusting means formed by connecting a large-capacity ON-OFF solenoid valve and a small-capacity electropneumatic regulator in parallel. Until the pressure value is reached, the ON-OFF solenoid valve is used to rapidly increase the pressure in the pneumatic container, and after reaching the pressure value, the voltage regulator is used to switch between the two so as to automatically adjust the pressure. The pressure adjustment control means is provided.

[Prior Art 2]
Prior Art 2 (see Non-Patent Document 1) Japan High Pressure Technology Association, established in January 1980, revised in March 1997, “Standard for Aeration Devices for Fixed Roof Oil Storage Tanks” HIPS-G-103 -1977 (hereinafter referred to as tank ventilator standards) and "Explanation of standards relating to ventilators for fixed-roof oil storage tanks" are described as follows.

  "This standard applies to normal and emergency ventilating equipment for cylindrical fixed-roof oil storage tanks installed on the ground that are used at normal pressure." However, reference can be made to the present invention for standards relating to ground-mounted cylindrical fixed roofs used at normal pressure.

For definitions of terms used in this application, refer to the terms listed in the tank ventilator standards:
(1) An open vent (see 22 and 23 in FIG. 3 to be described later) is a ventilation device that constantly balances the tank internal pressure and the external air pressure, and (2) a vacuum relief valve (see 24 in FIG. 3 to be described later). ) Is a valve having a structure for introducing the atmosphere AR into the tank when the tank has a negative pressure higher than a certain level.

Japanese Patent Laid-Open No. 5-119846 Japan High Pressure Technology Association, established in January 1980, revised in March 1997, "Standards for opening aeration equipment for fixed roof oil storage tanks" HIPS-G-103-1977

In the open vents 22 and 23 of the prior art 2, the generated gas unnecessary component G32a such as a volatile component in the tank 1 is discharged to the atmosphere outside the tank. In such a situation, if the generated gas unnecessary component G32a is diffused outside the tank, it may cause pollution such as odor and air pollution. If negative pressure is reached, the tank may explode.

  When the tank is filled with a liquid and stored, when the in-tank storage material SM such as a liquid is introduced into a sealed tank, the gas inside the tank is compressed and is in a pressurized state. Further, when the tank storage material SM is removed, the space volume is increased and a negative pressure state is obtained. Moreover, when reaction gas is generated inside the tank by fermentation, chemical reaction, or the like, the sealed tank is pressurized.

  Since the gas explosion pressure due to the pressurization of the gas GS in the tank or the atmospheric pressure due to the negative pressure (decompression) of the gas GS in the tank may cause deformation or breakage of the tank depending on the strength of the tank. An intake / exhaust port 21 through which the suction port 21 and the discharge port 21 are sucked and exhausted from the same entrance / exit is provided.

  However, when the gas GS in the tank is in a pressurized state, the exhaust gas component G32 is discharged from the intake / exhaust port to the atmosphere AR. This exhaust gas component G32 may cause pollution problems such as bad odor and air pollution. For this reason, generation of the pressurized state and the negative pressure state of the gas GS in the tank can be prevented, and only the generated gas unnecessary component G32 such as a volatile component and an evaporated component can be effectively exhausted at a low running cost with a low equipment cost. There is a demand for practical use of intake and exhaust devices.

  The present invention can utilize the conventional intake / exhaust port of the tank, and also separates the suction port 33 and the exhaust port 34 to separate the generated gas unnecessary component G32a and the atmosphere AR into an exhaust fan, a gas suction device, or the like. Separable intake / exhaust that can effectively exhaust the generated gas unnecessary component G32a while preventing the pressurized state and the negative pressure state of the gas GS in the tank by the exhaust device of the tank 1 sucked by the forced exhaust device 3 An object is to provide an apparatus 30.

  In the present invention, the suction gas 33 in the tank GS is pressurized by the suction / exhaust device of the tank 1 that separates the suction port 33 and the exhaust port 34 and sucks the generated gas unnecessary component G32a and the atmosphere AR with the forced exhaust device 3. And the separation type intake / exhaust device 30 capable of effectively exhausting the generated gas unnecessary component G32a while preventing the occurrence of the negative pressure state.

  As described above, the use of the separate type intake / exhaust device 30 prevents the occurrence of the pressurized state and the negative pressure state of the gas GS in the tank by using the intake / exhaust port 21 in one place of the prior art. However, it is possible to put to practical use an apparatus that effectively discharges the generated gas unnecessary component G32a generated inside the tank.

  In the best mode for carrying out the invention, the exhaust port 34 for discharging the generated gas unnecessary component G32a, the suction port 33 for replenishing the discharge of the generated gas unnecessary component G32a, and the pressurized state or negative pressure state of the gas GS in the tank are used. Accordingly, an air vent 32 for discharging or sucking the air AR is provided, and the exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device and the tank gas GS is in a pressurized state. Part of the internal gas GS is discharged from the air vent 32 to the atmosphere AR, and when the tank gas GS is in a negative pressure state, the tank separate-type intake / exhaust device 30 that sucks the air AR from the air vent 32 It is.

  In FIG. 1, the exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device 3, and the tank gas GS is pressurized due to the increase in the volume of the storage material SM in the tank, and a part of the gas GS in the tank is removed. It is explanatory drawing of the intake-exhaust flow path at the time of the atmospheric | air discharge of the separation-type intake / exhaust apparatus 30 of the tank discharged | emitted from the air vent 32 to the atmosphere AR.

  In FIG. 2, the exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device 3, and the tank gas GS is in a negative pressure state due to a decrease in the volume of the storage material SM in the tank. It is explanatory drawing of the intake-exhaust flow path at the time of the air | atmosphere inflow of the separation-type intake / exhaust apparatus 30 of the tank made to attract.

  FIG. 3A is a commonly used open bend diagram with a tip umbrella, FIG. 3B is a commonly used tip bend open bend diagram, and FIG. 3C is normally used. It is a vacuum relief valve figure. Note that the description of FIG. 4 is omitted because it has been described above.

  Hereinafter, specific examples in which the means for solving the above problems are modified and expanded will be described as embodiments in the form of claims with reference to the drawings and the reference numerals of the drawings.

  The embodiment 1 includes a suction port 33 and an exhaust port 34, and when the gas GS in the tank is in a pressurized state, the exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device 3, and the gas in the tank is discharged. This is a separation-type intake / exhaust device 30 for a tank that sucks an intake gas component GS1 from the suction port 33 when GS is in a negative pressure state.

  In the second embodiment, the exhaust port 34 for discharging the generated gas unnecessary component G32a, the suction port 33 for replenishing the discharge of the generated gas unnecessary component G32a, and the atmospheric AR are discharged according to the pressurized state or the negative pressure state of the gas GS in the tank. Alternatively, the exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device 3 and a part of the tank gas GS when the tank gas GS is in a pressurized state. Is separated from the atmosphere vent 32 to the atmosphere AR, and when the gas GS in the tank is in a negative pressure state, the tank is a separate intake / exhaust device 30 for sucking the atmosphere AR from the atmosphere vent 32. The best mode for carrying out the invention described above corresponds to the second embodiment.

  The embodiment 3 is the tank 1 to which the separation type intake / exhaust device 30 described in the embodiment 1 or the embodiment 2 is attached.

  Embodiment 4 is Embodiment 1 or Embodiment in which the operation and stop of the forced exhaust device 3 are automatically controlled when the pressure or component of the gas GS in the tank is detected by a sensor and reaches a predetermined set value. 2 is a separation type intake / exhaust device 30 according to the item 2;

  Hereinafter, an embodiment will be described with reference to FIG. FIG. 1 shows a gas component intake / exhaust flow path of a tank for sucking a popular absorbent component GS1 in which a suction port 33 and an exhaust port 34 are independent.

  The separation-type intake / exhaust device 30 shown in the figure includes a suction port 33 and an exhaust port 34, and an exhaust port 34 for discharging the generated gas unnecessary component G32a and a suction port 33 for replenishing the discharge of the generated gas unnecessary component G32a, When the tank gas GS is significantly pressurized, a part of the tank gas GS is discharged from the atmosphere vent 32 to the atmosphere AR, and when the tank gas GS becomes negative pressure, Air AR is sucked from the mouth 32.

  The exhaust gas component G32 discharged by the forced exhaust device 3 is subjected to pollution-free processing by the pollution-free processing device 3 so as not to cause pollution such as odor and air pollution.

  When the tank gas GS is pressurized by the generated gas unnecessary component G32a or when the tank gas GS is pressurized by introducing a tank storage material SM such as a liquid into the tank, the generated gas unnecessary component G32a is mainly supplied from the exhaust port 34. Is discharged by the forced exhaust device 3.

  At this time, the capability of the forced exhaust device 3 is made higher than the generation amount of the generated gas unnecessary component G32a, and the air AR is also exhausted from the suction port 33. It is also possible to automatically control operation and stop of the forced exhaust device 3 by installing a sensor for detecting the generated gas unnecessary component G32a.

  In the oven vents 22 and 23 of the prior art 2, the generated gas unnecessary component G32a such as a volatile component in the tank 1 may be diffused to the outside of the tank to cause pollution such as odor and air pollution. On the other hand, as shown in FIG. 1, the generated gas unnecessary component G32a discharged through the tank inlet / outlet (hereinafter referred to as nozzle) 1b is sucked from the exhaust port 34 of the tank 1 by the forced exhaust device 3, The pollution-free processing device 3 performs pollution-free processing.

  Next, the operation of the separate intake / exhaust device 30 will be described. The in-tank gas GS passes from the nozzle 1b to the separation type intake / exhaust device 30, and is then detoxified by the detoxification processing device 5.

  The in-tank gas GS in the separation-type intake / exhaust device 30 is sucked by the forced exhaust device 3, and the in-tank gas GS including the generated gas unnecessary component G32a has a negative pressure. Accordingly, the in-tank gas GS in the separation-type intake / exhaust device 30 is not discharged from the atmosphere vent 32 to the atmosphere AR. On the other hand, the atmosphere AR is always sucked into the tank 1 from the atmosphere vent 32 through the separation type intake / exhaust device 30.

  Since the pressure difference A between the air vent 32 and the suction port 33 is smaller than the pressure difference B between the liquid surface where the generated gas unnecessary component G32a is generated and the suction port 33, the air AR is normally sucked into the suction port 33. ing. However, when the storage material SM in the tank is charged or the temperature of the storage material SM in the tank rises, the generated gas unnecessary component G32a passes through the nozzle 1b and reaches the separation type intake / exhaust device 30.

  Since the differential pressure C between the exhaust gas reaching tank gas GSa reaching the separation plate exhaust device 30 and the suction port 33 is smaller than the differential pressure A, it is sucked into the suction port 33. Therefore, the separation-type intake / exhaust device 30 is formed so as to suck the exhaust device reaching tank gas GSa coming out of the nozzle 1b but not forcibly sucking the tank gas GS.

  Furthermore, when a large amount of generated gas unnecessary component G32a is generated due to a sudden rise in liquid level, the generated gas unnecessary component G32a is caused to flow into the atmosphere AR by increasing the suction amount automatically or manually. Absent. If the suction amount is insufficient, the tank gas GS containing the generated gas unnecessary component G32a is released from the atmospheric vent 32, so that the explosion of the tank due to the pressurization in the tank can be prevented.

  Usually, a safety device such as a blesser relief valve is installed to prevent explosion of the tank due to pressurization in the tank. However, the separation type intake / exhaust device 30 is provided with an air vent 32. Safety devices such as a blesser relief valve are unnecessary.

  When the gas GS in the tank becomes a negative pressure due to the extraction of the storage material SM in the tank of the prior art 2 described above, there is a possibility that the tank may explode. On the other hand, generally, a safety device such as a vacuum relief valve 24 as shown in FIG. 3 is provided. In a tank equipped with an intake / exhaust device for a tank and an intake / exhaust device, the implosion of the tank can be prevented without providing a safety device such as a vacuum relief valve 24.

  Also, when the exhaust gas component G32 including the generated gas unnecessary component G32a is discharged due to the increase in the temperature of the storage material SM in the tank due to the temperature increase in the tank 1, the exhaust port of the tank 1 is also similar to the above. The air is sucked by the forced exhaust device 3 from 34 and subjected to the pollution-free processing by the pollution-free processing device 5.

  When the gas GS in the tank becomes negative, as described above, the compulsory exhaust device 3 has a higher capacity than the generation amount of the generated gas unnecessary component G32a, and the required suction gas component GS1 is supplied from the suction port 33. By sucking into the tank, the negative pressure damage of the tank is prevented.

  FIG. 2 described above is a diagram for explaining the operation when the tank storage material SM is extracted and the liquid level in the tank is lowered, and the gas GS in the tank has a negative pressure. At this time, the atmosphere AR flows into the tank from the atmosphere vent 32 until it passes through the separation type intake / exhaust device 30 and the pressure in the tank reaches atmospheric pressure.

  Usually, a device for preventing implosion due to negative pressure (decompression) of the gas GS in the tank is installed, and when the gas GS in the tank becomes negative pressure, the valve operates to cause the atmosphere AR to flow into the tank. However, since the separation-type intake / exhaust device 30 is provided with the air vent 32, an implosion prevention device is unnecessary.

  The generated gas unnecessary component G32a discharged from the separation type intake / exhaust device 30 is a means for passing a combustion decomposition component or a scranov bar and releasing it to the atmosphere AR, a means for recovering using an adsorbent, etc. The pollution-free processing device 5 performs pollution-free processing.

  The embodiments disclosed herein are illustrative and non-restrictive in every respect, and the scope of the present invention is shown not by the above description but by the scope of claims, and is equivalent to the scope of claims. Includes all changes within the meaning and scope.

  As described above, the effect of the first embodiment is that the separation-type intake / exhaust device 30 is used, and the pressure state and negative pressure of the gas GS in the tank are reduced by using the intake / exhaust port 21 of the conventional technique. The generated gas unnecessary component G32a generated inside the tank is effectively discharged while preventing the generation of the pressure state.

  The effects of the second embodiment are as follows. The first effect of the second embodiment is that the in-tank gas GS in the separation-type intake / exhaust device 30 is sucked by the forced exhaust device, and the in-tank gas GS including the generated gas unnecessary component G32a has a negative pressure. . Accordingly, the in-tank gas GS in the separation-type intake / exhaust device 30 is not discharged from the atmosphere vent 32 to the atmosphere AR.

  In the prior art, a safety device such as a pressure relief valve is installed in order to prevent explosion of the tank due to pressurization in the tank. The second effect of the second embodiment is that the separation-type intake / exhaust device 30 is provided with the air vent 32, so that a safety device such as a pressure relief valve is unnecessary.

  In the prior art, when the gas GS in the tank becomes negative due to the extraction of the storage material SM in the tank or the like, the tank may explode. Therefore, the safety of the vacuum relief valve 24 as shown in FIG. A device is provided. The third effect of the second embodiment is that the tank intake / exhaust device and the tank to which the intake / exhaust device is attached can prevent the tank from being exploded without providing a safety device such as a vacuum relief valve 24. .

  The effects of the present invention or embodiments described above do not have to be all at the same time, but only need to have one or more effects of the present invention or embodiments.

  The separation-type intake / exhaust device 30 can use the conventional intake / exhaust port of a tank, and also separates the intake port 33 and the exhaust port 34 to generate the generated gas unnecessary component G32a and the atmosphere AR with an exhaust fan, gas By the exhaust device of the tank 1 that is sucked by the forced exhaust device 3 such as a suction device, the generated gas unnecessary component G32a can be effectively exhausted while preventing the generation of the pressurized state and the negative pressure state of the gas GS in the tank. An intake / exhaust device that prevents the occurrence of a pressurized state and a negative pressure state of the gas GS in the tank, and can effectively exhaust only the generated gas unnecessary component G32 such as a volatile component and an evaporated component with low equipment cost and low running cost. Can be expected for practical use.

The exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device, and the tank gas GS is pressurized due to the increase in the volume of the storage material SM in the tank. It is explanatory drawing of the intake-exhaust flow path at the time of the atmospheric | air discharge of the separation type intake / exhaust device 30 of the tank discharged | emitted from the atmosphere to the atmosphere AR. The exhaust gas component G32 is discharged from the exhaust port 34 by the forced exhaust device, and the tank gas GS is in a negative pressure state due to the volume reduction of the storage material SM in the tank, and the atmosphere AR is sucked into the atmosphere AR from the tank 32. FIG. 6 is an explanatory diagram of intake / exhaust flow paths when the separated intake / exhaust device 30 flows into the atmosphere. (A) is a commonly used open bend diagram with a tip umbrella, (B) is a commonly used tip bend open bend diagram, and (C) is a commonly used vacuum relief valve diagram. . FIG. 6 is an explanatory diagram of a gas component intake / exhaust flow path of a conventional tank in which a suction action for sucking the suction gas component GS1 as a tank gas GS and an exhaust action of the exhaust gas component G32 are made to function at the same inlet / outlet port 21; is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank 1a Tank opening part 1b Nozzle 3 Compulsory exhaust apparatus / exhaust fan 4 Drain removal 5 Non-polluting processing apparatus 20 Integrated intake / exhaust device 21 Intake / exhaust port 22 Tip-off umbrella with tip umbrella 23 End bend open bend 24 Vacuum relief valve 30 Separation type intake / exhaust device 32 Atmospheric vent port 33 Suction port 34 Exhaust port AR Atmosphere GS Tank gas GSa Exhaust device reaching gas GS1 Intake gas component G32 Exhaust gas component G32a Generated gas unnecessary component SM Tank storage material.

Claims (4)

  Attach a separate intake / exhaust port with independent suction and exhaust ports, and when the tank is pressurized, exhaust gas components are discharged from the exhaust port with forced exhaust equipment, and the gas in the tank is negative pressure An intake / exhaust device for a tank provided with the separation-type intake / exhaust port for allowing an intake gas component to be sucked from the intake port.   Attach a separate intake / exhaust port with independent suction and exhaust ports, exhaust port for discharging generated gas unnecessary components, suction port for replenishing discharge of generated gas unnecessary components, and gas in the tank are pressurized A tank equipped with the above-described separation type intake / exhaust port that causes a part of the gas in the tank to be discharged from the air vent to the atmosphere when the gas is discharged and the air is sucked from the air vent when the gas in the tank becomes negative Intake and exhaust device.   A tank equipped with an intake / exhaust device having the separate intake / exhaust port according to claim 1.   3. An exhaust system having a separate intake / exhaust port according to claim 1 or 2, wherein when the gas in the tank is detected by a sensor and reaches a predetermined set value, the forced exhaust device is automatically operated. And an intake / exhaust device having a separate intake / exhaust port for controlling stoppage.

Images