KR102138431B1 - Lpg supply system with hot-water vaporizer and pre-mix - Google Patents

Abstract

The present invention increases the vaporization efficiency by arranging a plurality of spiral coiled tubes integrally molded with cooling fins in the shape of a concentric or non-concentric axis without using electricity in the piping line of a liquefied petroleum gas supply system supplied from a gas tank. A small and lightweight water vaporizer with low maintenance cost was installed at the rear end of the gas tank.
In addition, a pressure sensor and a motor-driven butterfly valve are installed at the front end of the premixing device connected to the rear end of the hot water vaporizer to control the transfer amount of the vaporized gas fuel and secure the optimum air-fuel ratio. A motor-driven butterfly valve for controlling the amount of air flowing in the vertical upper direction of the body is interlocked with the gas supply amount control in the proportional control module, and the gas and air are mixed and supplied in an optimal condition, so that complete combustion is possible. In case of gas leakage, the gas explosive power is lower than that of supplying only gas, so it is a safe structure, and a surge tank is installed at the rear end of the pre-mixing device to increase the supply stability. It's about the system.

Description

Liquefied petroleum gas supply system equipped with hot water vaporizer and premixing device {LPG SUPPLY SYSTEM WITH HOT-WATER VAPORIZER AND PRE-MIX}

The present invention relates to a liquefied petroleum gas supply system having a hot water vaporizer and a pre-mixing device capable of ensuring high vaporization efficiency, complete combustion, and safety of liquid gas fuel, and more specifically, liquefied petroleum supplied from a gas tank. A compact and lightweight structure that increases vaporization efficiency and lowers maintenance costs by arranging multiple spiral coil-type tubes integrally molded with cooling fins without using electricity in the gas supply system piping line in a concentric or non-concentric shape. Install a hot water vaporizer at the rear end of the gas tank,

In addition, a pressure sensor and a motor-driven butterfly valve are installed at the front end of the premixing device connected to the rear end of the hot water vaporizer to control the transfer amount of the vaporized gas fuel and secure the optimum air-fuel ratio. A motor-driven butterfly valve for controlling the amount of air flowing in the vertical upper direction of the body is interlocked with the gas supply amount control in the proportional control module, and the gas and air are mixed and supplied in an optimal condition, so that complete combustion is possible. In case of gas leakage, the gas explosive power is lower than that of supplying only gas, so it is a safe structure, and a surge tank is installed at the rear end of the pre-mixing device to increase the supply stability and supply liquefied petroleum gas with a hot water vaporizer and a pre-mixing device. It's about the system.

The electric vaporizer used to vaporize the liquid gas stored in the gas tank can use electricity easily, but the possibility of generating electric sparks is high, so the risk of explosion still exists even if the expensive explosion-proof type is used, and one coil type heat exchanger tube is used. Because it is used, heat exchange efficiency is low, and increasing the heat transfer area increases the installation space, and there is a problem that the cost ratio is higher than other energy due to the maintenance cost of electricity use.

When burning gas in the combustor, only the surrounding air is used, so the thermal efficiency decreases due to incomplete combustion with insufficient oxygen. Especially, when burning a lot of gas in an enclosed space such as winter, headache occurs due to lack of oxygen, and indoor pollution is increased. There,

If gas fuel and air are mixed and supplied in an optimal fuel economy condition, the gas concentration decreases and the intensity of the gas explosion decreases even if the gas leak occurs, but it is safer, but if the gas leaks when supplying only gas, the gas explosive power is relatively high. There is a problem.

Accordingly, the present invention was invented to solve all the problems of the prior art as described above, and its purpose is to use a hot water type vaporizer that does not need to use electricity to vaporize liquid liquefied petroleum gas. The risk of explosion can be excluded, and the hot water vaporizer increases the vaporization efficiency by arranging the coil-type tube with the cooling fin integrally formed in a concentric or non-concentric spiral shape, reducing the installation space and reducing the end of the supply line. Can be easily installed on,

In addition, in order to have the optimum mixing ratio between gas and air before supplying gas to the combustor, the premixing device controls the pressure sensor and the motor-driven butterfly valve by a proportional control module by interlocking the gas supply amount and the air intake amount. Combustion is possible to increase combustion efficiency, and in particular, by mixing 55% of high-calorie propane gas with 45% of air, the calorific value can be lowered to the level of city gas, thereby securing excellent price competitiveness compared to city gas.

In addition, in the pre-combustion system, the concentration of gas passing through the gas pipe decreases due to the premixing of gas and air, so even if a gas leak occurs, the intensity of the gas explosive power decreases, so a hot water vaporizer and a premixing device that can supply gas more safely are installed. It is to provide a equipped liquefied petroleum gas supply system.

In order to increase the heat exchange efficiency of hot water and liquid liquefied petroleum gas, which is a heat medium for achieving the object of the present invention, a coil-type tube formed integrally with a plurality of cooling fins along the circumferential surface is formed in a spiral shape to be concentric or non-concentric. A carburetor with a reduced installation space is produced by arranging a plurality of shafts, and a sealed cylindrical cylinder is formed at the outermost part to block low-temperature inflow from the outside to the hot water type carburetor, and the hot water discharged to the outside is discharged into this cylindrical cylinder. The structure is formed so that the liquid gas fuel stays in the sealed space of the separated front end by welding two disks apart from the inner diameter of the hot water vaporizer to increase the thermal efficiency and evenly flows into the spiral coil type tube. The gas fuel is supplied stably by receiving and mixing the gas fuel evaporated from the hot water cylinder and the gas naturally evaporated from the gas tank at the rear end and the gas fuel evaporated from the hot water cylinder in the middle part, To complete the vaporizer for hot water consisting of a gas cylinder to

In addition, a motor-driven butterfly valve that can control the amount of gas supply and a pressure sensor to measure the inlet gas pressure are built-in in the inner diameter of the nozzle, which corresponds to the tip of the premixer, so that the optimum fuel efficiency is achieved according to the calculation of the proportional control module. The mixer is controlled to be produced, and a spiral groove is formed on the inner diameter surface of the lower end of the nozzle, and turbulence is formed by the vortex phenomenon in the venturi at the pressure of the outflowing gas, so that the gas and air are well mixed, and the nozzle A motor-driven butterfly valve that controls the amount of external air sucked by negative pressure formed near the neck of the venturi located at the lower end of the nozzle in the premixing device assembled with the venturi and the venturi is a proportional control module that interlocks with the gas inflow amount. It characterized in that it is configured to be operated simultaneously by.

As described above, in the liquefied petroleum gas supply system equipped with the hot water vaporizer and premixing device of the present invention, liquid liquefied petroleum gas can be vaporized without using electricity directly, thereby eliminating the risk of gas explosion due to electric sparks. In addition, since there is no need to use expensive explosion-proof heat transfer devices, purchase and management costs are greatly reduced, and competitiveness can be secured compared to other energy sources.

The body of the hot water vaporizer has the advantage of reducing the installation space because it increases the vaporization efficiency by arranging a plurality of coil-type tubes integrally formed with cooling fins in a concentric or non-concentric spiral structure.

In addition, since gas and air are mixed and supplied to the combustor in an optimal condition in advance, the combustion efficiency can be increased with complete combustion, and fuel can be saved, so the effect of reducing fuel costs can be expected.

In addition, since the concentration of the mixer passing through the gas pipe is lower than when only the gas is supplied, the gas explosive power decreases even when a leaked gas occurs, so that the effect of supplying the gas more safely can be expected.

1 is a basic system diagram showing a conventional liquefied petroleum gas supply system
Figure 2 is a basic system diagram showing a liquefied petroleum gas supply system equipped with a hot water vaporizer and premixing device of the present invention
Figure 3a is a detailed view showing the hot water vaporizer of the present invention
Figure 3b is a detailed view showing a first embodiment of the hot water vaporizer of the present invention
Figure 4 is a detailed view showing the premixing device of the present invention

Hereinafter, the configuration of the present invention will be described in detail according to embodiments with reference to the accompanying drawings.

As shown in Figure 1, the conventional liquefied petroleum gas supply system takes the liquid pipe 10 from the gas tank 100 and transfers the high-pressure liquefied petroleum gas to the electrothermal vaporizer 200 using the electric heater 11. After the gas is converted into gaseous gas by the heat exchange action with the heating medium heated by electricity, the low-pressure gas is transferred to the gas pressure regulator 13 through the gas pipe 12 and is supplied to the combustor 14 so that the gas is supplied to the surrounding area. It relates to a liquefied petroleum gas supply system where combustion occurs while being mixed with air, but always has a high possibility of incomplete combustion with insufficient oxygen.

Figure 2 is a liquefied petroleum gas supply system equipped with a hot water vaporizer which is advantageous for safety and maintenance cost reduction by increasing the vaporization efficiency of liquid gas fuel in the present invention and a premixing device capable of complete combustion at an optimal air-fuel ratio. Regarding, the liquid liquefied petroleum gas stored in the gas tank 100 is transferred to the hot water vaporizer 300 through the liquid pipe 10, and the cylinder 20 corresponding to the body of the hot water vaporizer 300 Liquid liquefied petroleum gas transferred along the spiral concentric coil-type tube 22 formed integrally with the cooling fins 21 embedded in the cylinder 20 flows through the inlet 23 installed at the upper left of the cylinder 20 The gas fuel converted to the gas phase while exchanging heat with the hot water and another gas fuel naturally evaporated from the gas tank 100 ride on a gas pipe 12a connected to the upper end of the gas tank 100 and ride the hot water vaporizer ( 300) is introduced and mixed through an inlet 23a installed at the rear of the rear end, and these gaseous fuels are transferred to a premixing device 400 connected to the right side of the central axis of the hot water vaporizer 300, and the premixing device The mixer that mixes gas fuel and air in an optimal ratio by the pressure sensor 24 mounted at the left inlet of 400 and the proportional control module 25 capable of motor control is transferred to the surge tank 500 connected to the right. It plays a role of a storage amount and a buffer pressure that can stably respond to a consumer's gas consumption, and the mixer staying in the surge tank 500 is transferred to a gas pressure regulator 13 installed at the rear end of the gas pipe 12 to be transferred to the combustor 14 ), it is possible to reduce the amount of pollutants generated by the pre-mixing of gas fuel and air, and if gas leakage occurs in the gas pipes (12, 12c), it is possible to supply only gas. It relates to a liquefied petroleum gas supply system having a relatively safe structure by reducing the intensity of gas explosive power because the gas concentration is lower than that of the supply system.

3A is a detailed view of the hot water vaporizer 300 shown in FIG. 2, wherein the liquefied petroleum gas introduced from the liquid pipe 10 is welded to the left inner diameter of the cylinder 20 by welding the disk 26 A spiral concentric coil-type tube (22) in which a plurality of cooling fins (21) are integrally formed in the plurality of holes (28) formed by piercing the disk (26) and formed in the liquid cylinder (27). ) Or a non-concentric coil type tube (22a), and the concentric coil type tube (22) or the non-concentric coil type tube (22a) has a plurality of holes (28a) in the right end By welding the disc 26a to the inner diameter of the cylinder 20, a cylinder 29 for hot water is formed on the left side, and a gas cylinder 30 is formed on the right side, and a hot water inlet 23 is formed at the upper left side of the cylinder 20. ) And the lower right portion are formed respectively with connection holes 31 for outflow of hot water that has finished heat exchange, and a sealed cylindrical cylinder 32 that surrounds the outer diameter of the cylinder 29 for hot water is installed in duplicate. Hot water having a lower temperature while exiting 31 fills the cylindrical cylinder 32 to block low temperature intruding from the outside, and directs hot water to the outside through the outlet 33 formed at the lower left of the cylindrical cylinder 32. Discharge, and measure the level of hot water by installing a level gauge 34 on the rear surface of the middle portion of the cylindrical cylinder 32,

In addition, at the rear of the middle part of the gas cylinder 30, there is an inlet 23a for receiving the boil-off gas transmitted from the gas tank 100 through the gas pipe 12a, and at the upper end, the vaporized gas pressure increases rapidly. It relates to a hot water vaporizer 300 having a structure for efficiently producing gas and safely discharging it to the outside by installing a safety valve 16 and a pressure gauge 18, respectively, in order to solve the strength safety problem.

3B is a detailed example of the first implementation of the hot water vaporizer 300 shown in FIG. 2, wherein the liquefied petroleum gas introduced from the liquid tube 10 is a stopper-type disc on the left and right sides of the inner diameter of the cylinder 20 (35, 35a) are welded to form a space for the liquid cylinder 27 on the left, the cylinder 29 for hot water in the middle, and the gas cylinder 30 on the right, respectively, and the center of the stopper-type disks 35 and 35a A small-diameter spiral corrugated tube 36 is fixed to the inner end of each of the holes 28b and 28c formed in the shaft by welding, so that the liquid liquefied petroleum gas remaining in the liquid cylinder 27 passes through the hole 28b. After being introduced through the spiral corrugated tube 36 and the hole 28c connected to each other, boil-off gas is generated through heat exchange by hot water and sent to the gas cylinder 30 to stay,

In addition, in the upper and lower directions of the holes 28b and 28c, the horizontal direction bent 90 degrees to communicate with the vertical holes 37 and 37a drilled in the inside of the stopper-type disks 35 and 35a to allow the inflow of hot water. A medium-diameter spiral corrugated tube (36a) is inserted into the inner diameter portion of the cylindrical grooves (38, 38a) formed and fixed by welding to allow the inflow of hot water, and the outer diameter formed at the top end of the vertical holes (37, 37a) A large-diameter spiral corrugated tube 36b is inserted into the surface protrusions 39 and 39a and fixed by welding,

A plurality of holes 28 formed on the outer surface of the stopper-shaped disk 35 are drilled in a horizontal direction, so that the liquid liquefied petroleum gas flowing from the left side is transferred to the hot water cylinder 29 and the medium-diameter spiral corrugated tube 36a. The gaseous fuel vaporized by the heat exchange action by the hot water passing therebetween is welded to the right side through a hole 28a drilled in a symmetrical manner similar to that formed in the stopper-type disc 35 Is transferred to the gas cylinder 30 of the gas cylinder 30, and receives and mixes the boil-off gas sent from the gas tank 100 through the inlet 23a formed on the rear of the middle portion of the gas cylinder 30, A safety valve (16) and a pressure gauge (18) are installed on the upper part of the hot water system in which a number of spiral corrugated tubes (36, 36a, 36b) are formed concentrically so that excessive gas pressure can be safely discharged to the outside. It relates to a vaporizer (300).

4 is a detailed view of the premixing device 400 shown in FIG. 2, and a motor-driven butterfly valve for controlling the amount of gas flowing into the premixing device 400 connected to the right side of the gas pipe 12b. A pressure sensor 24 for measuring the gas pressure is installed in the horizontal nozzle 41 with a built-in 40), and the incoming gas is formed while passing through the spiral groove 42 formed on the right inner diameter of the nozzle 41 Turbulent flow is possible by the eddy current,

In addition, the flange 43 formed on the outer diameter surface of the middle portion of the nozzle 41 and the flange 43a formed to be connected to the hole 28d through the left end of the venturi 44 are formed to be easily and detachable with bolts. Structure, and a motor-driven butterfly valve (40a) is integrally built into the inner diameter portion of the air inlet (45) formed so that external air is introduced from the left vertical upper direction of the body of the venturi (44), and the air inlet ( At the lower end of 45), a premixing device 400 in which the body of the Venturi 44 that is bent 90 degrees in the horizontal direction is integrally formed is completed,

A motor driven butterfly valve 40 that controls the amount of gas inflow by providing pressure data measured by the pressure sensor 24 mounted at the left inlet of the nozzle 41 to the proportional control module 25 and a motor that controls the amount of air By interlocking the opening degree of the driving butterfly valve 40a, the mixing ratio of gas fuel and air is proportionally controlled so that the optimum fuel efficiency can be secured according to the change in gas usage,

In addition, instead of the motor-driven butterfly valve 40 installed on the left side of the nozzle 41, the sealing and operability of the spindle shaft 46 are manually rotated while supporting the spring 47 to be set in advance. Example of a structure in which the mixing ratio of gas fuel and air is adjusted by adjusting the opening degree of the motor-driven butterfly valve 40a that allows only the gas fuel flow rate and controls the air inflow amount based on the pressure data measured by the pressure sensor 24 It relates to a mixing device (400).

The present invention described above is not limited to the configuration and operation as shown and described. That is, the present invention can be variously changed and modified within the spirit and scope of the disclosed claims.

10: liquid tube 11: electric heater
12,12a,12b,12c: gas pipe 13: gas pressure regulator
14: combustor 15: open and close valve
16: safety valve 17: coil type heat exchanger tube
18: pressure gauge 20: cylinder
21: cooling fin 22: concentric circular coil type tube
22a: non-concentric axial coiled tube 23,23a: inlet
24: pressure sensor 25: proportional control module
26,26a: disk 27: liquid cylinder
28,28a,28b,28c,28d: hole 29: hot water cylinder
30: gas cylinder 31: connection hole
32: cylindrical cylinder 33: outlet
34: level gauge 35,35a: plug-type disc
36,36a,36b: spiral corrugated tube 37,37a: vertical hole
38,38a: cylindrical groove 39,39a: protrusion
40,40a: motor-driven butterfly valve 41: nozzle
42: spiral groove 43,43a: flange
44: venturi 45: air inlet
46: spindle shaft 47: spring
100: gas tank 200: electric carburetor
300: hot water vaporizer 400: premixing device
500: surge tank

Claims (4)

delete The left side formed by welding the disks 26 and 26a on the left and right sides of the inner diameter of the cylinder 20 corresponding to the body of the hot water vaporizer 300 installed at the rear end of the gas tank 100, the liquid cylinder 27, the middle part is on. The receiving cylinder 29 and the right side are respectively formed of a gas cylinder 30, and a plurality of cooling fins 21 are integrally formed on the outer circumferential surface by abutting the plurality of holes 28 and 28a formed by drilling the disks 26 and 26a. The liquid gas fuel introduced into the liquid cylinder 27 by welding the left and right ends of the spirally shaped concentric coil type tube 22 or the non-concentric coil type tube 22a is transferred to the concentric coil type tube ( 22) or the gas evaporated by heat exchange with hot water while passing through the non-concentric coil type tube 22a is transferred to the gas cylinder 30,
The outer diameter of the hot water cylinder 29 is provided with an outlet 33 at the lower left of the closed cylindrical cylinder 32 and a level gauge 34 at the rear of the middle part of the closed cylindrical cylinder 32 formed to be double wrapped to block heat loss. and,
In addition, the boil-off gas transferred from the gas tank 100 is introduced into the inlet 23a formed on the rear surface of the middle portion of the gas cylinder 30, so that the concentric coil type tube 22 or the non-concentric coil type tube 22a A liquefied petroleum gas supply system equipped with a hot water type vaporizer that mixes with the vaporized gas produced in) The left side formed by welding stopper-type disks 35 and 35a on the left and right sides of the inner diameter of the cylinder 20 corresponding to the body of the hot water vaporizer 300 installed at the rear end of the gas tank 100 is the liquid cylinder 27, the middle The portion is formed by a cylinder 29 for hot water and a gas cylinder 30 on the right side, and has a small diameter at the inner end of the holes 28b and 28c respectively formed in the central axis of the stopper-shaped disks 35 and 35a. The spiral corrugated tube 36 is concentrically welded so that the liquid gas fuel remaining in the liquid cylinder 27 is introduced through the hole 28b and transferred to the spiral corrugated tube 36 and the hole 28c. In the process, it is converted to gas by heat exchange with hot water and stays in the gas cylinder 30,
In addition, in the upper and lower directions of the holes 28b and 28c, cylindrical grooves in the horizontal direction formed to be bent by 90 degrees so as to communicate with the vertical holes 37 and 37a drilled inside the plug-shaped disks 35 and 35a, respectively. A medium-diameter spiral corrugated tube (36a) inserted in 38,38a) is welded to allow hot water inflow, and the outer diameter surface protrusions (39,39a) formed at the top ends of the vertical holes (37,37a) have a large-diameter spiral The corrugated tube (36b) is concentrically welded to allow the inflow of liquid gas fuel,
Liquid gas fuel introduced from the left through a plurality of holes 28 drilled in the horizontal direction along the circumferential direction on the outer surface of the stopper-shaped disk 35 is the medium-diameter spiral corrugated tube 36a and the large-diameter spiral While moving along the space formed between the corrugated tubes 36b, the hot water is vaporized by hot water passing through the inner diameter portion of the hot water cylinder 29 and the inner diameter portion of the spiral corrugated tube 36a, respectively, The gas passes through a hole 28a symmetrically drilled so as to communicate with the hole 28 along the circumferential direction of the stopper-type disk 35a, and then is transferred to the space on the right side of the gas cylinder 30, and the holes 28a, 28c A liquefied petroleum gas supply system having a hot water vaporizer having a structure in which the vaporized gas passing through is mixed with another vaporized gas introduced through an inlet 23a formed on the rear surface of the middle portion of the gas cylinder 30. The spindle shaft 46 and the spring 47 mechanism are in charge of controlling the amount of gas flowing into the premixing device 400, and a spiral groove is located on the right inner diameter of the nozzle 41 with the built-in pressure sensor 24 for measuring gas pressure. Form (42) so that it is well mixed with air by turbulent flow due to gas inflow,
In addition, the flange 43 formed on the outer diameter surface of the middle portion of the nozzle 41 and the flange 43a formed to be connected to the hole 28d through the left end of the venturi 44 are fastened with bolts, making it easy to attach and detach. And, a motor-driven butterfly valve (40a) is integrally built into the inner diameter of the air inlet (45) formed for inflow of external air in the vertical and upper left direction of the venturi (44) body, and the air inlet (45) A premixing device 400 is completed in which the body of the Venturi 44 that is bent 90 degrees in the horizontal direction is integrally formed at the lower end of ),
Since the spindle shaft 46 having a structure whose operability is determined by the tension of the spring 47 is opened and closed by manually rotating it, only a preset gas flow rate can be introduced, and pressure data provided by the pressure sensor 24 The proportional control module 25 operating on the basis of the liquefied petroleum gas supply system having a premixing device 400 having a structure that controls the mixing ratio of gas and air by adjusting only the opening degree of the motor-driven butterfly valve 40a.

Images