JP2015134623A - Management device and management method of liquid pressure feeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a management device and a management method of liquid pressure feeding where the breakage of a storage tank and the like caused by pressurized air can be surely prevented and the risk of the outflow of a liquid can be reduced.SOLUTION: A main pressure feeding passage 100 and an auxiliary pressure feeding passage 101 are connected with each other between a tank 20 and a storage tank 4. The main pressure feeding passage 100 has opening and closing means 100a and the auxiliary pressure feeding passage 101 has flow rate adjustment means 101a. The opening and closing means 100a is fully closed by inputting a full closing command 102a to the opening and closing means 100a when high liquid level detection means 102 detects that the height of a liquid level in the tank 20 is lowered to a prescribed height. The pressure feeding of a liquid 3 is performed through the auxiliary pressure feeding passage 101 while adjusting a flow rate with the flow rate adjustment means 101a after the opening and closing means 100a is fully closed.

Description

  The present invention relates to a liquid pressure management device and a liquid pressure management method for managing the pressure of liquid stored in a tank of a tank lorry to the storage tank by pressurized air.

  As this type of method and apparatus used heretofore, there can be mentioned, for example, the configuration shown in Patent Document 1 below. That is, in the conventional configuration, when supplying the liquid from the tank lorry for transporting the liquid to the storage tank, the liquid is pumped by pressurizing the inside of the tank by an air compressor provided in the tank lorry or an air supply source installed in the factory. Has been done.

  As a liquid to be pumped in this way, as described in Patent Document 2, there is hydrochloric acid used for removing oxide scale on the surface of the steel strip. In Patent Document 2, a mixture of pressurized air and hydrochloric acid fumes remaining in the tank after the completion of hydrochloric acid pumping flows in a large amount into a scrubber provided on the storage tank outlet side, and hydrochloric acid fumes are released into the atmosphere. A configuration for preventing this is described. In the configuration disclosed in Patent Document 2, a chamber is provided between a tank of a tank truck and a storage tank. A float valve for opening and closing the lower outlet is provided in the chamber. When the tank is filled with hydrochloric acid, the float valve is opened by buoyancy, and hydrochloric acid is sent from the lower outlet to the storage tank. When a certain amount of hydrochloric acid fume is stored in the chamber, the buoyancy is weakened so that the lower outlet is closed by the float valve, and pressurized air and hydrochloric acid fume are sent from the upper outlet of the chamber to the storage tank. A needle valve is provided at the upper outlet, so that the pumping amount of hydrochloric acid fume can be adjusted.

JP 2001-304493 A Japanese Patent No. 2928819

  When the liquid to be pumped is an acid solution such as hydrochloric acid, a container such as a storage tank is often made of a resin material such as polyethylene from the viewpoint of acid resistance. Since a container made of a resin material has a lower strength than a metal container, the possibility of deformation or breakage due to pressurized air increases. Damage to the container and outflow of the acid solution to the outside should be avoided because it has a large impact on the surrounding environment.

  The chamber of Patent Document 2 is also made of a resin material from the viewpoint of acid resistance. However, since the chamber of Patent Document 2 is filled with pressurized air, the pressurized air may damage the chamber and cause the acid solution to flow out of the chamber.

  The present invention has been made to solve the above-described problems, and its purpose is to more reliably prevent the storage tank and the like from being damaged by the pressurized air, and to reduce the risk of liquid flowing out. It is to provide a liquid pressure management device and a liquid pressure management method that can be used.

  A liquid pressure management device according to the present invention is a liquid pressure management device that manages the pressure of liquid stored in a tank of a tank lorry to the storage tank by pressurized air, and detects the liquid level in the tank. It has a surface height detecting means, an opening / closing means, a main pressure feed path provided between the tank and the storage tank, and a flow rate adjusting means, and is provided in parallel with the main pressure feed path between the tank and the storage tank. A sub-pressure feeding path and pressure detecting means for detecting the internal pressure of the storage tank. The liquid level detector detects all the opening and closing means when detecting that the liquid level in the tank has dropped to a predetermined height. By inputting the close command, the opening / closing means is fully closed. After the opening / closing means is fully closed, the flow rate is adjusted by the flow rate adjusting means so that the internal pressure detected by the pressure detecting means does not exceed the predetermined pressure. Liquid through the pumping path It is configured to be sent.

  Further, the liquid pressure management device for managing the pressure of the liquid stored in the tank of the tank lorry to the storage tank by the pressurized air, wherein the liquid level detection means for detecting the liquid level in the tank is connected in series with each other. A pressure feed path provided between the tank and the storage tank, and a pressure detection means for detecting the internal pressure of the storage tank. When it is detected that the liquid level in the inside has dropped to a predetermined height, the opening / closing means is fully closed by inputting a fully closing command to the opening / closing means, and after the opening / closing means is fully closed, the flow rate adjusting means The opening / closing means is opened while the flow rate is restricted, and the liquid is pumped through the pressure feed path while the flow rate is adjusted by the flow rate adjusting means so that the internal pressure detected by the pressure detecting means does not exceed a predetermined pressure. There.

  A liquid pumping management method according to the present invention is a liquid pumping management method for managing pumping of liquid stored in a tank of a tank lorry to a storage tank by pressurized air, and is provided between a tank and a storage tank. The liquid is pumped through the pressure feed path, and when the liquid level height detecting means detects that the liquid level in the tank has been lowered to a predetermined height, the main pressure feed path is After the open / close means is fully closed and the open / close means is fully closed, the internal pressure of the storage tank detected by the pressure detection means does not exceed a predetermined pressure in parallel with the main pressure feed path between the tank and the storage tank. The method includes pumping the liquid through the auxiliary pressure feed path while adjusting the flow rate by the flow rate adjusting means of the provided secondary pressure feed path.

  Also, a liquid pressure management method for managing the pressure of the liquid stored in the tank of the tank lorry to the storage tank by pressurized air, the liquid being pumped through a pressure supply path provided between the tank and the storage tank, When the liquid level height detecting means detects that the liquid level in the tank has dropped to a predetermined level, the pressure level opening / closing means is fully closed by the fully closing command from the liquid level detecting means, and the opening and closing is also performed. After the means is fully closed, the flow rate adjustment means connected in series with the open / close means opens the open / close means while restricting the flow rate, and the flow rate is adjusted so that the internal pressure of the storage tank detected by the pressure detection means does not exceed a predetermined pressure. Pumping the liquid through the pumping path while adjusting the flow rate by the means.

  According to the liquid pressure management device and the liquid pressure management method of the present invention, when the liquid level height detecting unit detects that the liquid level in the tank has been lowered to a predetermined height, the open / close unit is fully closed, After that, the liquid is pumped while adjusting the flow rate by the flow rate adjusting means, so that it is possible to prevent the pressurized air from flowing into the equipment downstream of the tank lorry. Thereby, it can prevent more reliably that a storage tank etc. are damaged by pressurized air, and can reduce a possibility that a liquid flows out outside.

It is explanatory drawing which shows the liquid pumping management apparatus by Embodiment 1 of this invention. It is explanatory drawing explaining the relationship between the discharge pipe of FIG. 1, and a liquid level detection means. It is explanatory drawing which shows the liquid pumping management apparatus by Embodiment 2 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is an explanatory diagram showing a liquid pressure management device 1 according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory diagram for explaining the relationship between the discharge pipe 20b and the liquid level detecting means 102 in FIG. In FIG. 1, a liquid pressure management device 1 is a device for managing the pressure of liquid 3 stored in a tank 20 of a tank lorry 2 to the storage tank 4 by pressurized air. The liquid pressure management device 1 includes a pressure limiter 10 mounted on the tank lorry 2 and a pressure detection means 11 attached to the storage tank 4.

  First, the structure of the tank lorry 2 side related to the pumping of the liquid 3 will be described. The tank lorry 2 is equipped with a tank 20, an air compressor 21 (pressurized air supply means), a pressure limiter 10 of the liquid pressure control device 1, and a tank lorry side connection port 22. The liquid 3 stored in the tank 20 is, for example, hydrochloric acid or the like and has been carried by the tank lorry 2 to be transferred to the storage tank 4.

  The air compressor 21 is connected to the upper part of the tank 20 through an air supply valve 21a and an air supply pipe 21b. A discharge pipe 20b having a pressure source valve 20a is connected to the rear lower end of the tank 20. When pressurized air is supplied from the air compressor 21 to the tank 20 through the air supply pipe 21b while the air supply valve 21a and the pressure supply source valve 20a are opened, the liquid 3 is pressure-fed from the discharge pipe 20b.

  The pumping restriction unit 10 includes a main pumping path 100, a sub pumping path 101, and a liquid level detection means 102.

  The main pumping path 100 is a pipe provided between the tank 20 and the storage tank 4, more specifically between the pumping source valve 20a and the tank lorry side connection port 22. The main pumping path 100 is provided with opening / closing means 100a. The opening / closing means 100a is constituted by, for example, an electromagnetic automatic opening / closing valve or the like, and is constituted by a member capable of switching the opening / closing state between a fully closed state and a fully opened state. The open / close state of the opening / closing means 100a can be automatically switched according to a control command from the outside, and can also be switched manually.

  The sub pressure feed path 101 is a pipe connected in parallel with the main pressure feed path 100 between the tank 20 and the storage tank 4, more specifically between the pressure feed source valve 20 a and the tank lorry side connection port 22. The inner diameter of the sub pumping path 101 may be the same as the inner diameter of the main pumping path 100 or may be smaller than the inner diameter of the main pumping path 100. The sub pressure feed path 101 is provided with a flow rate adjusting means 101a. The flow rate adjusting means 101a is constituted by a needle valve or the like, for example, and is constituted by a member capable of arbitrarily adjusting the opening degree. The opening degree of the flow rate adjusting means 101a can be automatically switched according to an external control command, and can also be switched manually.

  The liquid level detector 102 is a sensor attached to the tank 20 and detects the liquid level in the tank 20. The liquid level detecting means 102 is constituted by, for example, a liquid level gauge having an electrode at the tip. When the liquid level detection means 102 detects that the liquid level in the tank 20 has dropped to a predetermined height, the liquid level detection means 102 inputs the full close command 102a to the open / close means 100a to fully close the open / close means 100a.

The liquid level height at which the liquid level detecting means 102 inputs the full-close command 102a to the opening / closing means 100a is:
The height at which the pressurized air does not flow out of the discharge pipe 20b, specifically, the height above the connection position upper end 20b _UE of the discharge pipe 20b to the tank 20 is set (see FIG. 2). By inputting the full-close command 102a to the opening / closing means 100a at such a liquid level, it is possible to prevent the pressurized air from being discharged unlimitedly through the discharge pipe 20b.

  The tank lorry side connection port 22 is provided on the exit side of the main pumping path 100 and the sub pumping path 101 and is a part to which one end of the supply hose 5 is connected.

  Next, the configuration on the side of the storage tank 4 to which the liquid 3 is pumped will be described. The storage tank 4 is connected with a storage tank side connection port 40, a liquid pressure feed pipe 41, a gas discharge pipe 42, a scrubber 43, and the pressure detection means 11 of the liquid pressure feed management device 1.

  The storage tank side connection port 40 is a part to which the other end of the supply hose 5 is connected. The liquid pressure feeding pipe 41 is a pipe that connects the storage tank side connection port 40 and the upper part of the storage tank 4. The gas discharge pipe 42 is a pipe having one end connected to the upper portion of the storage tank 4. The other end of the gas discharge pipe 42 is open to the atmosphere via a scrubber 43.

  The pressure detection means 11 is a sensor that detects the internal pressure of the storage tank 4. The internal pressure of the storage tank 4 is increased when the inflow amount of the fluid through the liquid pressure supply pipe 41 exceeds the discharge amount of the fluid through the gas discharge pipe 42. Such an increase in the internal pressure of the storage tank 4 can occur when pressurized air flows into the storage tank 4.

  Next, a liquid pumping method using the liquid pumping management apparatus 1 of FIG. 1 will be described. When the liquid 3 is supplied to the storage tank 4 by the tank lorry 2 on which the pumping restriction unit 10 of the liquid pumping management apparatus 1 is mounted, the procedure is as follows. First, the tank lorry 2 is moved close to the storage tank 4, and the tank lorry side connection port 22 and the storage tank side connection port 40 are connected by the supply hose 5. Next, the air compressor 21 is operated and the air supply valve 21 a is opened to supply pressurized air into the tank 20. At this time, the flow rate adjusting means 101a is closed and the opening / closing means 100a is opened.

  Next, when the internal pressure of the tank 20 reaches a required pressure, the pressure source valve 20 a is opened, and the liquid 3 in the tank 20 is pressure-fed to the storage tank 4. When the liquid level in the tank 20 is lowered to a predetermined height by pressure feeding, the state is detected by the liquid level detecting means 102. At this time, when the full-close command 102a is input from the liquid level detection means 102 to the opening / closing means 100a, the opening / closing means 100a is fully closed, and the pressure feeding is temporarily interrupted.

  After the opening / closing means 100a is fully closed, the flow rate adjusting means 101a is gradually opened, and the pressure feeding is resumed while monitoring the detected pressure of the pressure detecting means 11 so that the pressure does not exceed the pressure resistance strength of the storage tank 4.

  When the supply of the liquid 3 is completed, the air compressor 21 is stopped and the air supply valve 21a is closed. Thereafter, while monitoring the numerical value of the detected pressure of the pressure detecting means 11, the opening degree of the flow rate adjusting means 101 a is adjusted, and the pressurized air in the tank 20 is stored in the storage tank 4 until the internal pressure of the tank 20 becomes normal pressure. Pump.

  After the internal pressure of the tank 20 reaches normal pressure, the pressure source valve 20a and the flow rate adjusting means 101a are closed, and the supply hose 5 is removed from the tank lorry side connection port 22 and the storage tank side connection port 40.

  In the above description, the flow rate adjusting means 101a is closed when supplying pressurized air into the tank 20, but the flow rate adjusting means 101a may not be fully closed. That is, the flow rate adjusting means 101a may be opened as long as the inflow amount of the pressurized air can be limited so that the pressure in the storage tank 4 does not exceed the pressure capacity of the storage tank 4. Further, even in a situation where the inner diameter of the sub-pumping passage 101 is small and the inflow amount of pressurized air is restricted, the flow rate adjusting means 101a is opened to such an extent that the pressure in the storage tank 4 does not exceed the pressure capacity of the storage tank 4. Also good.

  In the liquid pressure management device 1 and the liquid pressure management method, the opening / closing means 100a is fully closed when the liquid level detection means 102 detects that the liquid level in the tank 20 has been lowered to a predetermined level. Then, since the liquid 3 is pumped while adjusting the flow rate by the flow rate adjusting means 101a, it is possible to prevent the pressurized air from flowing into the equipment downstream of the tank 20 of the tank lorry 2 without limitation. Thereby, it can prevent more reliably that a storage tank etc. are damaged by pressurized air, and can reduce the possibility that the liquid 3 flows out outside.

  Further, since the main pressure feed path 100 and the sub pressure feed path 101 are mounted on the tank truck 2, it is possible to eliminate the necessity of preparing the main pressure feed path 100 and the sub pressure feed path 101 for each storage tank 4. This configuration is extremely effective in a situation where the liquid 3 is supplied to a large number of storage tanks 4 by a small number of tank trucks 2.

Embodiment 2. FIG.
FIG. 3 is an explanatory diagram showing the liquid pressure management device 1 according to the second embodiment of the present invention. In the first embodiment, it has been described that the main pumping path 100 and the sub pumping path 101 connected in parallel with each other are used. A pressure feed path 103 is used. The pressure feed path 103 is provided with opening / closing means 100a and flow rate adjusting means 101a connected in series with each other.

  Next, a liquid pumping method using the liquid pumping management apparatus 1 of FIG. 3 will be described. Until the liquid level in the tank 20 is lowered to a predetermined height by the pressure feeding, and the full closing command 102a is input from the liquid level detection means 102 to the opening / closing means 100a, the opening / closing means 100a is fully closed. This is the same as the method of the first embodiment.

  After the opening / closing means 100a is fully closed, the opening / closing means 100a is opened while the flow rate adjusting means 101a limits the flow rate, and the pressure feeding is resumed. And pressure feeding is continued, monitoring the detection pressure of the pressure detection means 11 so that it may not become the pressure more than the pressure strength of the storage tank 4. FIG. Other configurations are the same as those in the first embodiment.

  The same effect as that of the first embodiment can also be obtained by using the pressure feed path 103 having the opening / closing means 100a and the flow rate adjusting means 101a connected in series as described above.

DESCRIPTION OF SYMBOLS 1 Liquid pumping management apparatus 11 Pressure detection means 100 Main pressure feeding path 100a Opening / closing means 101 Sub pressure feeding path 101a Flow rate adjusting means 102 Liquid level detection means 102a Fully closed command 103 Pressure feeding path 2 Tank lorry 20 Tank 3 Liquid 4 Storage tank

Claims (6)

A liquid pumping management device for managing the pumping of liquid stored in a tank of a tank lorry to a storage tank by pressurized air,
A liquid level detecting means for detecting a liquid level in the tank;
A main pumping path provided between the tank and the storage tank, having an opening and closing means;
A sub-pressure feed path provided in parallel with the main pressure feed path between the tank and the storage tank, and having a flow rate adjusting means,
Pressure detecting means for detecting the internal pressure of the storage tank,
When the liquid level detection means detects that the liquid level in the tank has dropped to a predetermined height, the liquid level detection means inputs a full close command to the open / close means to fully close the open / close means,
After the opening / closing means is fully closed, the liquid is pumped through the auxiliary pressure feed path while the flow rate is adjusted by the flow rate adjusting means so that the internal pressure detected by the pressure detecting means does not exceed a predetermined pressure. It is comprised as follows. The liquid pumping management apparatus characterized by the above-mentioned.   The liquid pumping management apparatus according to claim 1, wherein the main pumping path and the sub pumping path are mounted on the tank lorry. A liquid pumping management device for managing the pumping of liquid stored in a tank of a tank lorry to a storage tank by pressurized air,
A liquid level detecting means for detecting a liquid level in the tank;
Having an opening / closing means and a flow rate adjusting means connected in series with each other, and a pressure feed path provided between the tank and the storage tank;
Pressure detecting means for detecting the internal pressure of the storage tank,
When the liquid level detection means detects that the liquid level in the tank has dropped to a predetermined height, the liquid level detection means inputs a full close command to the open / close means to fully close the open / close means,
After the opening / closing means is fully closed, the flow adjustment is performed so that the opening / closing means is opened while the flow rate is restricted by the flow rate adjusting means, and the internal pressure detected by the pressure detecting means does not exceed a predetermined pressure. The liquid pumping management apparatus, wherein the liquid is pumped through the pumping path while the flow rate is adjusted by the means.   The liquid pumping management apparatus according to claim 3, wherein the pumping path is mounted on the tank lorry. A liquid pumping management method for managing pumping of liquid stored in a tank of a tank lorry to a storage tank by pressurized air,
When the liquid is pumped through a main pumping path provided between the tank and the storage tank, and the liquid level detection means detects that the liquid level in the tank has dropped to a predetermined level. The main pressure feed path opening / closing means is fully closed by a full-close command from the liquid level detection means, and the internal pressure of the storage tank detected by the pressure detection means is a predetermined pressure after the opening / closing means is fully closed. The liquid is pumped through the auxiliary pressure feed path while adjusting the flow rate by the flow rate adjusting means of the secondary pressure feed path provided in parallel with the main pressure feed path between the tank and the storage tank. A liquid pumping management method comprising: A liquid pumping management method for managing pumping of liquid stored in a tank of a tank lorry to a storage tank by pressurized air,
The liquid is pumped through a pumping path provided between the tank and the storage tank, and when the liquid level height detecting means detects that the liquid level in the tank has dropped to a predetermined height, The flow rate is restricted by a flow rate adjusting means connected in series to the open / close means after the open / close means of the pressure feed path is fully closed by a full close command from the liquid level detection means, and the open / close means is fully closed. While opening and closing the opening and closing means, and pumping the liquid through the pressure feeding path while adjusting the flow rate by the flow rate adjusting means so that the internal pressure of the storage tank detected by the pressure detecting means does not exceed a predetermined pressure. A liquid pumping management method characterized by the above.

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