CN220793436U - LNG gas heating device and heating system - Google Patents

Abstract

The utility model relates to the technical field of LNG gas heating, in particular to an LNG gas heating device and an LNG gas heating system. The utility model provides a LNG gas heating device, includes LNG gas tube, combustion chamber, gas holder and response combustor, LNG gas tube winding is located the outer wall of combustion chamber, the combustion chamber is equipped with a plurality of through-holes, the combustion chamber with the gas holder links to each other, response combustor is located in the combustion chamber. According to the LNG heating device, the LNG gas is heated by the combustion chamber, and the waste gas generated by heating returns to the combustion chamber to continue burning, so that the LNG heating cycle is formed, the generated waste gas is effectively utilized, the resource is saved, and the LNG heating device is environment-friendly.

Description

LNG gas heating device and heating system

Technical Field

The utility model relates to the technical field of LNG gas heating, in particular to an LNG gas heating device and an LNG gas heating system.

Background

LNG from LNG ships is usually stored in LNG storage tanks in liquid form, and when general ships are operated, the liquid LNG is supplied to a host in gaseous form through a vaporizer and a heater, the liquid LNG temperature is-164 ℃, and the gaseous LNG temperature is usually between 0 and 60 ℃, wherein a large temperature difference is required for secondary heat exchange.

The prior LNG ship heating circulation system mainly uses a water/glycol mixed solution as a heating circulation medium, the freezing point of the mixed solution is-30 ℃, the phenomenon of icing of a heat exchange tube of an LNG vaporizer can be effectively prevented, so that the heat exchange efficiency is improved, and the glycol solution heated by a heater can be secondarily heated through engine cooling water or steam on a ship to form a complete heating circulation system.

As shown in fig. 1, the liquefied LNG comes out of the storage tank, 130 is normally closed, 100 high-pressure pumps feed the water/glycol solution into the pipeline, 150 metering devices monitor the LNG to heat the LNG, 170 metering devices feed the water/glycol solution into engine cooling water or seawater to perform secondary heating, 160 fans feed the generated exhaust gas into 120 combustion chambers to burn, and 110 ventilation masts discharge the exhaust gas into the atmosphere.

Most of the heat of combustion of the exhaust gases generated in the process is wasted, if there is a problem with the piping between the two metering monitors, a relatively large impact is exerted on the tank, and the water/glycol piping is typically provided with one more equipment and replacement piping, which also results in an increase in the initial cost of the equipment.

Therefore, there is a need for a more economical, environmentally friendly apparatus that optimizes the heating cycle for LNG.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, a first aspect of the present utility model provides an LNG gas heating apparatus, including an LNG gas pipe, a combustion chamber, a gas storage tank, and an induction burner, wherein the LNG gas pipe is wound around an outer wall of the combustion chamber, the combustion chamber is provided with a plurality of through holes, the combustion chamber is connected to the gas storage tank, and the induction burner is disposed in the combustion chamber.

Preferably, the LNG gas pipe includes an air inlet and an air outlet, and the air inlet and the air outlet are respectively disposed at two ends of the LNG gas pipe.

Preferably, the LNG gas pipe is spirally wound around the outer wall of the combustion chamber.

Preferably, the combustion chamber comprises a first zone and a second zone, the first zone is connected with the air storage tank, and the second zone is connected with the first zone;

preferably, the combustion chamber comprises a chimney, which is connected to the combustion chamber.

Preferably, the first and second regions are hollow tubes;

preferably, the cross section of the first region increases gradually in a direction away from the air reservoir.

Preferably, the hole diameter of the through hole is gradually increased along the direction away from the air storage tank;

preferably, the gas storage tank further comprises a feed pipe, and the gas storage tank is communicated with the combustion chamber through the feed pipe.

Preferably, a valve is also included, the valve being connected to the feed tube.

Preferably, the valve is a pneumatic valve.

Preferably, the air storage tank further comprises a fan, wherein the fan is connected with the air storage tank;

preferably, the LNG burner further comprises a housing, and the housing is arranged outside the LNG gas pipe and the combustion chamber.

The second aspect of the utility model provides an LNG gas heating system, which comprises a control part and the LNG gas heating device, wherein the control part is connected with the LNG gas heating device;

preferably, the LNG gas heating device further comprises a flame detection portion, wherein the flame detection portion is connected with the LNG gas heating device.

Preferably, the LNG storage device further comprises a gas supply portion, and the gas supply portion communicates with the LNG gas portion.

The utility model has the following technical effects:

1) In the utility model, LNG is directly combusted and heated by the combustion chamber at the beginning, so that the heating efficiency is high.

2) According to the LNG heating device, the LNG gas is heated by the combustion chamber, and the waste gas generated by heating returns to the combustion chamber to continue burning, so that the LNG heating cycle is formed, the generated waste gas is effectively utilized, the resource is saved, and the LNG heating device is environment-friendly.

3) In the utility model, since LNG gas is directly heated from the storage tank to the LNG gas pipe, the cost of a plurality of initial devices is reduced, and the device is simply designed, compact and safe are mutually coordinated.

Drawings

Fig. 1 is a block diagram showing a heating apparatus for LNG gas in the related art.

Fig. 2 is a schematic view showing the structure of the LNG gas heating apparatus according to the present utility model.

Fig. 3 is a schematic diagram showing a second structure of the LNG gas heating apparatus according to the present utility model.

Fig. 4 is a schematic view showing the structure of a combustion chamber of the LNG gas heating apparatus according to the present utility model.

Fig. 5 shows a schematic diagram of an LNG gas heating apparatus according to the present utility model.

Description of element reference numerals

1 LNG gas pipe

2. Combustion chamber

21. First zone

22. Second zone

3. Air storage tank

4. Induction burner

5. Through hole

6. Air inlet

7. Air outlet

8. Feeding pipe

9. Valve

10. Blower fan

11. Outer casing

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

Please refer to fig. 2-5. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

As shown in fig. 2-5, the LNG gas heating device of the present utility model includes an LNG gas pipe 1, a combustion chamber 2, a gas storage tank 3, and an induction burner 4, wherein the LNG gas pipe 1 is wound on an outer wall of the combustion chamber 2, the combustion chamber 2 is provided with a plurality of through holes 5, the combustion chamber 2 is connected with the gas storage tank 3, and the induction burner 4 is disposed in the combustion chamber 2. When the LNG heating device is used, firstly, fuel is added into the combustion chamber 2, the combustion chamber is ignited by the induction burner 4, after the temperature of the combustion chamber is increased to a proper temperature, LNG gas to be heated is input into the LNG gas pipe 1, and the heated gas is then sent into the gas supply part, so that the heating of the LNG gas is completed. In the present utility model, LNG is directly burned and heated in the combustion chamber 2, so that the heating efficiency is high.

In a preferred embodiment, the LNG gas pipe 1 includes a gas inlet 6 and a gas outlet 7, and the gas inlet 6 and the gas outlet 7 are respectively disposed at two ends of the LNG gas pipe 1. LNG gas to be heated enters from the gas inlet 6, and heated LNG gas enters the gas supply section from the gas outlet 7. Preferably, the LNG gas pipe 1 is spirally wound around the outer wall of the combustion chamber 2, so that the LNG gas pipe 1 is in sufficient contact with the combustion chamber 2 to improve heating efficiency.

In a preferred embodiment, the combustion chamber 2 comprises a first zone 21 and a second zone 22, the first zone 21 being connected to the air reservoir 3, the second zone 22 being connected to the first zone 21, the first zone 21 and the second zone 22 being hollow tubular bodies, the radius of the cross section of the first zone 21 increasing progressively in a direction away from the air reservoir 3. Preferably, the material of the combustion chamber 2 is metallic, which effectively reduces the risk of wear and downtime.

In a preferred embodiment, the combustion chamber 2 comprises a chimney connected to the combustion chamber 2 for exhausting combusted gases to the atmosphere. The chimney is of conventional design.

In a preferred embodiment, the hole diameter of the through hole 5 is gradually increased along the direction away from the air storage tank 3, so that air can enter the combustion chamber 2, and preferably, the through hole 5 is arranged at two sides of the combustion chamber 2 and is symmetrical along the central axis of the combustion chamber 2.

In a preferred embodiment, the air storage tank 3 is communicated with the combustion chamber 2 through the feeding pipe 8, and the feeding pipe 8 is close to the induction burner 4 so as to ensure ignition.

In a preferred embodiment, a valve 9 is further included, said valve 9 being connected to said feed pipe 8 for controlling the flow of exhaust gases from said gas reservoir 3 through said feed pipe 8 into said combustion chamber 2. Preferably, the valve 9 is a pneumatic valve. More preferably, valves can be arranged on the LNG gas pipe 1 and other pipelines according to actual needs.

In a preferred embodiment, the air storage device further comprises a fan 10, the fan 10 is connected with the air storage tank 3, the fan 10 can introduce ambient air into the combustion chamber 2 on one hand, and can uniformly drive waste generated by the air supply part into the air storage tank 3 to burn in the combustion chamber 2, the generated heat can heat LNG gas in the subsequent LNG gas pipe 1, and the waste heat can be reasonably utilized to finally realize thermal circulation.

In a preferred embodiment, the LNG burner further comprises a housing 11, and the housing 11 is disposed outside the LNG gas pipe 1 and the combustion chamber 2.

The second aspect of the utility model provides an LNG gas heating system, which comprises a control part and the LNG gas heating device, wherein the control part is connected with the LNG gas heating device; the control part is a conventionally used controller and comprises a Central Processing Unit (CPU), a Network Processor (NP) and the like; but may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA), graphics processor (Graphics Processing Unit GPU), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

In a preferred embodiment, the LNG heating system further comprises a flame detection unit, wherein the flame detection unit is connected to the LNG gas heating device. Preferably further comprises a gas supply part, which is communicated with the LNG gas pipe 1 for supplying gas to the LNG gas pipe 1. The gas supply part refers to a device, a structure or a component or a system to which the heated LNG gas is to be delivered, and belongs to conventional arrangements. The flame detection part is of a conventional design for a person skilled in the art, is commercially available in the prior art and is used for monitoring the combustion state of the combustion chamber at any time.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The utility model provides a LNG gas heating device, its characterized in that, includes LNG gas tube (1), combustion chamber (2), gas holder (3) and induction burner (4), LNG gas tube (1) winding is located the outer wall of combustion chamber (2), combustion chamber (2) are equipped with a plurality of through-holes (5), combustion chamber (2) with gas holder (3) link to each other, induction burner (4) are located in combustion chamber (2).

2. The LNG gas heating apparatus according to claim 1, wherein the LNG gas pipe (1) includes a gas inlet (6) and a gas outlet (7), the gas inlet (6) and the gas outlet (7) being provided at both ends of the LNG gas pipe (1), respectively;

and/or the LNG gas pipe (1) is spirally wound on the outer wall of the combustion chamber (2).

3. LNG gas heating plant according to claim 1, characterized in that the combustion chamber (2) comprises a first zone (21) and a second zone (22), the first zone (21) being connected to the gas storage tank (3), the second zone (22) being connected to the first zone (21);

and/or the combustion chamber (2) comprises a chimney, which is connected to the combustion chamber (2).

4. A LNG gas heating plant according to claim 3, characterized in that the first zone (21) and the second zone (22) are hollow tubular bodies;

and/or the cross section of the first zone (21) increases gradually in a direction away from the air reservoir (3).

5. A LNG gas heating device according to any of claims 1-3, characterized in that the through-holes (5) have a gradually increasing pore size in a direction away from the gas reservoir (3).

6. A LNG gas heating plant according to any of claims 1-3, further comprising a feed pipe (8), said gas storage tank (3) being in communication with said combustion chamber (2) through said feed pipe (8).

7. LNG gas heating plant according to claim 6, further comprising a valve (9), said valve (9) being connected to said feed pipe (8).

8. LNG gas heating plant according to claim 7, characterized in that the valve (9) is a pneumatic valve.

9. The LNG gas heating plant according to claim 1, further comprising a fan (10), said fan (10) being connected to said gas storage tank (3);

and/or, the LNG gas burner further comprises a shell (11), and the shell (11) is arranged outside the LNG gas tube (1) and the combustion chamber (2).

10. An LNG gas heating system, comprising a control unit and the LNG gas heating apparatus of any one of claims 1 to 9, the control unit being connected to the LNG gas heating apparatus;

and/or, the LNG gas heating device further comprises a flame detection part, wherein the flame detection part is connected with the LNG gas heating device;

and/or, still include the air feed portion, the air feed portion communicates with the LNG gas pipe (1).