KR101313161B1 - Apparatus for supplying glycol water - Google Patents

Abstract

PURPOSE: A glycol water device is provided to automatically mix pure glycol with water in an optimal ratio when low water level alert of an expanded tank is on, to provide reliable and high quality glycol water as water is automatically refilled in the expanded tank and to prevent loss of human life due to pure glycol gas by using an automatic process. CONSTITUTION: A glycol water device comprises a raw material supplying part (100) which supplies pure glycol and water; a mixing part (200) which mixes pure glycol water in order to manufacture glycol water; a glycol water flow line (300) which becomes a flow path of glycol water from the mixing part to a glycol water supply collection management part; and an expanded tank (400) which is installed in the glycol water flow line and receives the glycol water. The mixing part circulates the pure glycol and water and manufactures the glycol water. [Reference numerals] (AA) Water; (BB) Compressed air; (CC) Exhaust; (DD) Drain; (EE) Supplement; (FF) Collect; (GG) Supply; (HH) Source of demand

Description

Glycol water supply unit {APPARATUS FOR SUPPLYING GLYCOL WATER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glycol water supply device, wherein pure glycol and water are mixed to refill a glycol water expansion tank to be used to heat a storage tank or a hull structure of a cryogenic cargo hold. The present invention relates to a glycol water supply device.

In general, LNG carriers, LNG regasification facilities, etc. have a storage tank of cryogenic cargo hold, in this case, in the heating system for the storage tank or related hull structure, glycol water, which is a heating fluid in which water is mixed with pure glycol I'm using.

However, due to leakage of glycol water during the operation of the heating device, the amount of glycol water used in the heating loop is decreasing.

For example, a liquefied natural gas regasification facility in a liquefied natural gas carrier in the patent literature includes a transport pipe installed to transport liquefied natural gas (LNG) from a storage tank of a liquefied natural gas carrier (LNGC) to a land terminal, and the transport pipe A first pump that is attached to the liquefied natural gas from the storage tank and the liquefied natural gas that is mounted to the transport pipe and drawn by the first pump is heated by steam of a boiler of the liquefied natural gas carrier A plurality of heating portions are provided which heat the fluid, each of which includes a closed loop pipe, that is, a heating circuit, through which the heating fluid flows.

In the patent literature or the prior art, ethylene glycol (Ethylene Glycol) is used as a heating fluid, and ethylene glycol is a kind of antifreeze also called glycol water, which has a molecular weight of 62.07, a melting point of -12.6 ° C, a boiling point of 197.7 ° C, and a specific gravity of 1.1131 (粘稠) It is a colorless liquid with sweetness.

By using such ethylene glycol as a heating fluid for the vaporization of liquefied natural gas, it serves to prevent freezing in the pipe in case of steam use.

However, if a low water level warning occurs by detecting the low water level of glycol water at the level gauge of an expansion tank located at the top of the heating circuit, the operator may have to manually refill the expansion tank with insufficient water. Thereby mixing the pure glycol and water at a predetermined ratio.

In this case, the gas generated from the pure glycol is exposed to the worker, and if the worker performing such work is exposed to the gas generated from the pure glycol for a long time, it may lead to loss of life.

In addition, the operator operates a means (eg, a pump) for supplying a mixture of pure glycol and water, such as a pump, to supply and replenish glycol water to an expansion tank, which requires a lot of time for maintenance and operation. There is this.

That is, in the related art, the worker manually carries out mixing and replenishing pure glycol and water, and there is a risk of a potential safety accident. .

Korean Patent Registration No. 10-0743904

In the embodiment of the present invention, when the low water level warning of the expansion tank occurs, pure glycol and water are automatically mixed at an appropriate ratio, and automatically replenished into the expansion tank, thereby providing reliable and high-quality glycol water, and pure glycol according to an automated process. To provide a glycol water supply device that can prevent the loss of life due to the gas in advance.

According to an aspect of the invention, the raw material supply unit for supplying pure glycol and water; A mixing unit for mixing the pure glycol and water supplied from the raw material providing unit to prepare glycol water; A glycol water flow line serving as a flow path of glycol water from the mixing portion to the glycol water supply recovery treatment portion; And an expansion tank installed in the glycol water flow line and accommodating the glycol water, wherein the mixing unit may provide a glycol water supply device configured to circulate the pure glycol and water by itself to produce the glycol water. .

In addition, the raw material providing unit, a water supply line for supplying the water; A glycol storage tank for storing the pure glycol to be mixed with the water; And a raw material supply line connected between the glycol storage tank and the mixing unit.

In addition, the mixing unit, the first switching valve is connected upstream and downstream of the raw material supply line and the water supply line; A mixing tank connected to a downstream of the raw material supply line to receive the water or the pure glycol; A tank discharge line extending from the inside of the tank to the outside of the tank; A fluid transfer unit connected to a rear end of the tank discharge line and flowing glycol water; A circulation line connected to a first branch point downstream of the raw material supply line; And a second switching valve connected to the discharge passage at the rear end of the fluid transfer unit, the glycol water flow line, and the circulation line.

In addition, the mixing tank may include a water level meter that provides a control value for controlling the glycol water supply device, the measured value corresponding to the flow rate or level of the fluid stored in the mixing tank.

In addition, the glycol water flow line is connected between the second switching valve and the expansion tank, it is possible to supply the glycol water produced in the mixing unit to the expansion tank.

In addition, the fluid transfer unit, the air line receiving compressed air from the outside; A control valve installed in the air line and controlling a supply amount of the compressed air; And a pump operated by compressed air controlled by the control valve to supply the glycol water of the mixing tank to the second switching valve.

In addition, a third switching valve is installed in the air line for controlling the supply amount and the supply direction of the compressed air; A bypass line connected to the third diverter valve and the third branch point of the tank discharge line and bypassing the air line; And a check valve installed in the bypass line.

The glycol water supply recovery processing unit may include a recovery line of a demand destination connected to the glycol water flow line and a second branch point to a rear end of the expansion tank; And a glycol water circulation pump installed between the recovery line of the customer and the supply line of the customer.

Embodiments of the present invention has the advantage of blocking the exposure to harmful vapors generated by the pure glycol source.

In addition, the embodiment of the present invention is convenient to use and manage as an automatic system by the control unit.

That is, the embodiment of the present invention has an advantage that the mixing ratio of water and pure glycol water can be automatically adjusted by the water level meter provided in the mixing tank and the control unit for controlling the glycol water supply device connected to the water level meter.

In addition, the embodiment of the present invention is provided with a circulation line and the second switching valve in the mixing portion, by implementing the recycling of the glycol water, there is an advantage that can be produced homogeneous glycol water.

In addition, another embodiment of the present invention further provides a third switching valve, a bypass line, and a check valve to form a bubble in the glycol water, thereby facilitating the preparation of the glycol water by promoting the mixing of the glycol water. There is this.

1 is a circuit diagram of a glycol water supply device according to a first embodiment of the present invention.
2 is a circuit diagram of a glycol water supply device according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1st Example

1 is a circuit diagram of a glycol water supply device according to a first embodiment of the present invention.

Referring to FIG. 1, the first embodiment 10 includes a raw material providing unit 100, a mixing unit 200, a glycol water flow line 300, an expansion tank 400, a glycol water supply recovery treatment unit 500, It includes a control unit 600, the mixing unit 200 may circulate the pure glycol and water by itself to automate the production of glycol water.

The raw material provider 100 may serve to supply pure glycol or water.

The mixing unit 200 is made of glycol water by mixing the pure glycol and water selectively supplied from the raw material providing unit 100, the pure glycol and water is circulated in the circuit of the glycol water supply device itself and homogeneously mixed It can be done.

In addition, the glycol water flow line 300 may be a flow path of the glycol water from the mixing unit 200 to the glycol water supply recovery processing unit 500.

That is, the glycol water flow line 300 is connected between the second switching valve 260 and the expansion tank 400, and serves to supply the glycol water manufactured by the mixing unit 200 to the expansion tank. Can be.

In addition, the expansion tank 400 may be connected to the glycol water flow line (300).

Expansion tank 400 may serve to receive the glycol water. In addition, the expansion tank 400 may be generally configured as an open type or a closed type, and may not be limited to the form or structure thereof.

In addition, the raw material providing unit 100 may include a water supply line 110 for supplying water.

Here, the water may be conventional service water used to prepare distilled water, fresh water or glycol water.

In addition, the raw material providing unit 100 may include a glycol storage tank 120 for storing the pure glycol to be mixed with water. The glycol storage tank 120 may further include an inflow passage for supplying a flow meter, an exhaust vent line, and pure glycol from the outside.

In addition, the raw material providing unit 100 may include a raw material supply line 130 connected between the glycol storage tank 120 and the mixing unit 200.

A shutoff valve 121 may be installed in the raw material supply line 130 to the rear end of the glycol storage tank 120. The shutoff valve 121 may be normally maintained in an open state, and may be switched to a closed state by an operator for cleaning, maintenance, or the like of the glycol storage tank 120.

The raw material supply line 130 may be composed of an upstream 131 corresponding to the glycol storage tank 120 and a downstream 132 corresponding to the mixing unit 200, and an upstream 131 of the raw material supply line 130. ) And a downstream switch 132 may be disposed between the first switch valve (210).

The mixing unit 200 may include a first switching valve 210, a mixing tank 220, a tank discharge line 230, a fluid transfer unit 240, a circulation line 250, and a second switching valve 260. have.

The first switching valve 210 may be connected to the upstream 131 and the downstream 132 of the raw material supply line 130 and the water supply line 110 of the raw material providing unit 100.

The third switch valve (see reference numeral 610 in FIG. 3), which will be described in the second embodiment below, including the first switch valve 210 and the second switch valve 260, is an overall automated operation of the glycol water supply device. It may be a valve driving unit controlled by the control unit 600 for controlling the, and a three-way valve that can selectively switch the flow direction by selectively opening or closing by the valve driving unit.

For example, the first selector valve 210 opens or shuts off a corresponding valve point so that the glycol water selectively flows into the downstream 132 of the raw material supply line 130, or in a state in which water is blocked in the inflow of glycol water. The valve point may be blocked or opened to flow into the downstream 132 of the raw material supply line 130, and as a result, the flow path may be changed.

In this case, the flow rate may be adjusted by adjusting the time at which the valve point is blocked or opened.

In addition, the control unit 600 is a kind of distributed control system (DCS) control device, and a low water level warning occurs in a level alarm device 410 installed in the expansion tank 400 to warn an operator or an operator. Can play a role. In addition, the control unit 600 operates the first and second switching valves 210 and 260 to mix the pure glycol and the water at a predetermined ratio corresponding to the measured value in the water level meter 221 installed in the mixing tank 220. It may serve to control the operation of the third switching valve (see reference numeral 610 in FIG. 2) of the second embodiment to control or to adjust the bubble generation amount and the bubble generation time. In addition, the control unit 600 may control the control valve 242 and consequently play a role of controlling the operation of the pump 243.

Here, the pump 243 is a kind of air diaphragm pump, and may be operated by compressed air supplied to the control valve 242.

The mixing tank 220 may be connected to the downstream of the raw material supply line 130 may serve to receive water or pure glycol.

Here, the mixing tank 220 provides the control unit 600 for controlling the glycol water supply device with a measured value corresponding to the flow rate or level of the fluid (eg, water, pure glycol, glycol water) stored in the mixing tank 220. It may include a water gauge 221.

In addition, the mixing tank 220 may further include a drain line 222 and a drain valve 223 for maintenance.

The water level meter 221 may be installed at an installation position, such as a tank wall, which is an interior or exterior of the mixing tank 220 or a boundary point between an interior and an exterior, and transmits a measurement value toward the control unit 600. ) May be connected.

The tank discharge line 230 may be installed to extend from the inside of the tank of the mixing tank 220 to the outside of the tank.

The fluid transfer unit 240 may be connected to the rear end of the tank discharge line 230, which is outside the tank, and serve to flow glycol water.

Here, the fluid transfer unit 240 is provided with an air line 241 for receiving compressed air from the outside, a control valve 242 installed in the air line 241, and controlling a supply amount of compressed air, and a control valve 242. By operating the compressed air controlled by the supply amount, it may include a pump (243) for sucking the glycol water of the mixing tank 220 to supply to the second switching valve (260).

Here, the circulation line 250 may be connected to the first branch point C1 of the downstream 132 of the raw material supply line 130.

In addition, the discharge channel 244 of the pump 243 of the fluid transfer unit 240, the glycol water flow line 300, and the circulation line 250 may be connected to the second switching valve 260.

In addition, the glycol water supply recovery processing unit 500 is a rear end of the expansion tank 400, the recovery line 510 of the demand destination connected to the glycol water flow line 300 and the second branch point (C2), and the recovery line of the demand destination It may include a glycol water circulation pump 530 installed between the 510 and the supply line 520 of the demand destination.

The glycol water circulation pump 530 may generate an operation force for supplying and recovering the glycol water of the expansion tank 400 to a demand device, such as a storage tank of a cryogenic cargo hold or a heating device for heating the hull structure.

Referring to the operation of the first embodiment 10 configured as described above, the control unit 600 generates a low water level warning in the water level alarm device 410 installed in the expansion tank 400 to warn the operator or operator (operator), May input a supplementary command to the controller 600.

Accordingly, the controller 600 may perform an injection operation.

In the injection operation, the valve operation of the first switching valve 210 is controlled so that the pure glycol of the glycol storage tank 120 is upstream 131 of the raw material supply line 130, the first switching valve 210, and the raw material supply line. It is injected into the mixing tank 220 via the downstream 132 of 130.

Subsequently, the controller 600 adjusts the fluid injection ratio corresponding to the measured value of the water level gauge 221, so that when the quantity of pure glycol is replenished in the mixing tank 220, the flow path of the first switching valve 210 is By changing, water may be injected into the mixing tank 220.

In addition, the first switching valve 210 blocks the valve so that water or pure glycol does not flow into the mixing tank 220.

After the injection operation is completed, the circulation operation may proceed.

In the circulation operation, a flow path of the second switch valve 260 may be set to mix water and pure glycol.

That is, in the circulation operation, the tank discharge line 230 and the circulation line 250 side of the three-way flow path of the second switching valve 260 is opened, the glycol water flow line 300 is closed, and the control valve The pump 243 is operated by the compressed air supplied according to the opening of 242.

In this case, the fluid having the pure glycol and the water not yet completely mixed is the tank discharge line 230, the second switch valve 260, the circulation line 250, the first branch point (C1), the raw material supply line 130 The mixture is sufficiently mixed while circulating along the downstream 132 and the mixing tank 220, and as a result, homogeneous glycol water can be obtained.

After the circulation operation is completed, the replenishment operation can proceed.

That is, in the replenishment operation, the tank discharge line 230 and the glycol water flow line 300 may be opened and the circulation line 250 may be closed in the three-way flow path of the second switching valve 260.

In this case, the glycol water sucked by the pump 243 may be replenished to the expansion tank 400 along the tank discharge line 230, the second switch valve 260, and the glycol water flow line 300.

In addition, the control logic circuit of the control unit 600 is programmed to warn the operator, and at the same time, to automatically input the supplementary command to perform the following operations, or to warn the operator, It may be programmed to perform the mixing and replenishment operations correspondingly.

Second Example

This embodiment differs only in the configuration of bypassing compressed air, i.e., bypasses it, and in other configurations is the same as the configuration of the first embodiment of FIG. .

2 is a circuit diagram of a glycol water supply device according to a second embodiment of the present invention.

2, the second embodiment 10 'is installed in the air line 241 to be selectively used in a parallel structure instead of the control valve 242 of the first embodiment, the supply amount and supply direction of the compressed air It may include a third switching valve 610 to control.

Here, the operation of the third switching valve 610 may also be controlled by the controller 600.

In addition, the second embodiment 10 ′ is connected to a third branch point C3 of the tank discharge line 230 of the mixing tank 220 and the third switching valve 610 so that the compressed air is sheared by the pump 243. Bypass line 620 and bypass line 620 to bypass the air line 241 of the inlet to the mixing tank 220 through the third branch point (C3) and the tank discharge line 230 It may include a check valve (630).

Here, the third selector valve 610 operates the pump 243 by supplying compressed air to the pump 243, like the control valve 242 (see FIG. 1) of the first embodiment by selectively opening or closing the flow path. And it may serve to generate bubbles in the water and pure glycol of the mixing tank 220 by introducing the compressed air toward the mixing tank 220.

In addition, the check valve 630 prevents backflow of compressed air, or the water and the pure glycol or glycol water of the mixing tank 220 through the tank discharge line 230 and the third branch point (C3) bypass line ( 620 to prevent backflow.

Referring to the operation of the second embodiment 10 ', when the glycol water is filled in the mixing tank 220 due to the supply of water and pure glycol, as in the first embodiment, bubbles are generated in the glycol water so as to quickly This facilitates the mixing of water and pure glycol, thereby making it possible to produce more homogeneous glycol water.

Bubbles of the mixing tank 220 may be discharged to the outside through the exhaust line (640, 641) connected to the upper portion of the mixing tank 220, or may be supplied to the air treatment facility (not shown).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

10, 10 'Example 100: Raw material provider
200: mixing section 300: glycol water flow line
400: expansion tank 500: glycol water supply recovery treatment
600:

Claims (8)

Raw material provider for supplying pure glycol and water;
A mixing unit for mixing the pure glycol and water supplied from the raw material providing unit to prepare glycol water;
A glycol water flow line serving as a flow path of glycol water from the mixing portion to the glycol water supply recovery treatment portion; And
Installed in the glycol water flow line, including an expansion tank for receiving the glycol water,
The mixing unit is a glycol water supply device for producing the glycol water by circulating the pure glycol and water by itself. The method of claim 1,
The raw material providing unit,
A water supply line for supplying the water;
A glycol storage tank for storing the pure glycol to be mixed with the water; And
Glycol water supply device comprising a raw material supply line connected between the glycol storage tank and the mixing unit. 3. The method of claim 2,
The mixing unit,
A first switching valve connected upstream and downstream of the raw material supply line and the water supply line;
A mixing tank connected to a downstream of the raw material supply line to receive the water or the pure glycol;
A tank discharge line extending from the inside of the tank to the outside of the tank;
A fluid transfer unit connected to a rear end of the tank discharge line and flowing glycol water;
A circulation line connected to a first branch point downstream of the raw material supply line; And
And a second switching valve connected to the discharge passage of the rear end of the fluid transfer unit, the glycol water flow line, and the circulation line. The method of claim 3, wherein
The mixing tank,
And a water level meter which provides a measured value corresponding to the flow rate or level of the fluid stored in the mixing tank to a control unit for controlling the glycol water supply device. The method of claim 3, wherein
The glycol water flow line,
Glycol water supply device is connected between the second switching valve and the expansion tank, supplying the glycol water produced in the mixing unit to the expansion tank. The method of claim 3, wherein
The fluid transfer unit,
An air line receiving compressed air from the outside;
A control valve installed in the air line and controlling a supply amount of the compressed air; And
And a pump which is operated by compressed air controlled by the control valve to supply the glycol water of the mixing tank to the second switching valve. The method according to claim 6,
A third switching valve installed in the air line and controlling a supply amount and a supply direction of the compressed air;
A bypass line connected to the third diverter valve and the third branch point of the tank discharge line and bypassing the air line; And
Glycol water supply device further comprising a check valve installed in the bypass line. The method according to any one of claims 1 to 7,
The glycol water supply recovery treatment unit
A recovery line of the demand destination connected to the glycol water flow line and the second branch point to the rear end of the expansion tank; And
Glycol water supply apparatus including a glycol water circulation pump installed between the customer's recovery line and the customer's supply line.

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