CN216743830U - Economical LNG (liquefied Natural gas) reheater - Google Patents
Economical LNG (liquefied Natural gas) reheater Download PDFInfo
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- CN216743830U CN216743830U CN202220086012.0U CN202220086012U CN216743830U CN 216743830 U CN216743830 U CN 216743830U CN 202220086012 U CN202220086012 U CN 202220086012U CN 216743830 U CN216743830 U CN 216743830U
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Abstract
The utility model discloses an economical LNG (liquefied natural gas) reheater, which comprises a shell and an electric heating element arranged in the shell, wherein the shell is provided with a BOG (boil off gas) low-temperature gas inlet connecting pipe, a high-temperature gas outlet and an electric heating element socket. The reheater is arranged at a BOG gas discharge port of the LNG storage tank, and a tail end pipeline is connected to a conveying pipeline of the LNG storage tank. BOG gas gets into directly by electric heating pipe directness in the reheater after, and the heating process is isolated with the air completely, and no safety risk does not have the heat waste that indirect heating brought simultaneously, and the thermal efficiency is high, can ensure to discharge to exhaust duct behind the heating temperature. Tests prove that when the environmental temperature is low and the BOG gas flow is large in winter, the medium temperature of the low-temperature pipeline can reach more than 10 ℃ after being heated by the reheater. The double-heater has simple structure, low manufacture cost of the shell and low purchase cost of the electric heating element, so the whole double-heater is economical and practical.
Description
Technical Field
The utility model belongs to the field of liquefied natural gas transportation, and particularly relates to an economical LNG reheater.
Background
At present, an air-temperature type gasifier or a water bath type boiler is generally adopted by a reheater, wherein the air-temperature type gasifier has poor heat exchange effect when the environmental temperature is low and the gas flow is large in winter, and the phenomena of icing and frosting of pipelines and equipment occur to influence the normal operation of process pipelines; the water bath type boiler is adopted for heating, the heated medium is utilized for exchanging heat with the low-temperature gas, the temperature of the low-temperature gas can be increased, but the process is indirect heat exchange, the energy loss is large when the heat exchange medium operates, and the energy efficiency is relatively low; and the installation of the water bath boiler has high investment cost and is not economical enough.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an economical LNG reheater with good heat exchange effect and high energy efficiency.
The economical LNG reheater provided by the utility model comprises a shell and an electric heating element arranged in the shell, wherein the shell is provided with a BOG low-temperature gas inlet connecting pipe, a high-temperature gas outlet and an electric heating element socket.
In an embodiment of the reheater, the shell is arranged vertically, flanges are respectively arranged at two ends of the shell, and the connection pipe for the BOG low-temperature gas inlet is arranged at the lower part of the shell and is communicated with a BOG steam outlet of the LNG storage tank.
In an embodiment of the above reheater, the upper end of the casing is a high-temperature gas outlet end, and is hermetically connected with an exhaust pipe, the end of the exhaust pipe is connected with a regulating valve, and the end of the regulating valve is connected to a delivery pipeline of the LNG storage tank.
In an embodiment of the above reheater, the exhaust duct includes two symmetrically arranged 90 ° elbows and a horizontal connecting pipe therebetween, wherein the lower end of the 90 ° elbow on one side is connected with the upper end flange of the housing in a sealing manner through a flange, the lower end of the other 90 ° elbow is connected with a vertical pipe, and the lower end of the vertical pipe is connected with the regulating valve through a third 90 ° elbow.
In one embodiment of the above reheater, the electric heating element is a flange-type stainless steel electric heating tube inserted from the lower end of the housing, and the flange is hermetically connected with the flange at the lower end of the housing.
In one embodiment of the recuperator, a temperature transmitter is disposed in the housing proximate the upper port.
The reheater is arranged at a BOG gas discharge port of the LNG storage tank, and a tail end pipeline is connected to a conveying pipeline of the LNG storage tank. BOG gas gets into directly by electric heating pipe directness in the reheater after, and the heating process is isolated with the air completely, and no safety risk does not have the heat waste that indirect heating brought simultaneously, and the thermal efficiency is high, can ensure to discharge to exhaust duct behind the heating temperature. Tests prove that when the environmental temperature is low and the BOG gas flow is large in winter, the medium temperature of the low-temperature pipeline can reach more than 10 ℃ after being heated by the reheater. The double-heater has simple structure, low manufacture cost of the shell and low purchase cost of the electric heating element, so the whole double-heater is economical and practical.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the economical LNG recuperator disclosed in this embodiment includes a housing 1, an electric heating pipe 2, a 90-degree elbow 3, a horizontal header 4, a vertical pipe 5, a regulating valve 6, and a temperature transmitter 7.
The shell 1 is arranged vertically, two ends of the shell are connected with flanges, and the lower part of the side wall is connected with a BOG low-temperature gas inlet connecting pipe 11.
The 90-degree elbows 3 are three, two of which are symmetrically arranged and connected with the horizontal connecting pipe 4. One lower end of two symmetrically arranged 90-degree elbows 3 is connected with a vertical pipe 5, the lower end of the vertical pipe 5 is connected with a third 90-degree elbow 3, and the tail end of the third 90-degree elbow is connected with a regulating valve 6.
The electric heating element 2 adopts a flange type stainless steel electric heating pipe, is a purchased part, can determine heating power according to the maximum flow of BOG gas, and selects proper number and length of heating branch pipes. The flange at the lower end of the shell is matched with the flange of the electric heating pipe.
A temperature variation transmitter 7 is provided in the housing 1 near the upper port to monitor the temperature of the heated gas in the housing.
The reheater compares the monitored temperature of the temperature transmitter 7 with a set temperature value to realize power load adjustment.
When the recuperator is assembled, the other lower end of the two 90-degree elbows which are symmetrically arranged is hermetically connected with the flange at the upper end of the shell through the flange, the sealing gasket and the fastening piece, namely a pipeline formed by connecting the three 90-degree elbows, the horizontal connecting pipe and the vertical pipe is used as an exhaust pipeline of the recuperator. The pipe body part of the electric heating pipe is inserted from the lower end of the shell, and a sealing gasket is arranged between the flange of the electric heating pipe and the flange at the lower end of the shell and is connected through a fastening piece. The BOG low-temperature gas inlet connecting pipe at the lower part of the shell is hermetically connected with the steam exhaust connecting pipe of the LNG storage tank, and the outlet pipe of the regulating valve is connected to a low-temperature delivery pipeline of the LNG storage tank.
The shell, the exhaust pipeline, the BOG low-temperature gas inlet connecting pipe and the pipe body of the electric heating pipe of the reheater are all made of stainless steel.
The reheater is arranged at a BOG gas discharge port of the LNG storage tank, and a tail end pipeline is connected to a conveying pipeline of the LNG storage tank. BOG gas gets into directly by electric heating pipe directness in the reheater after, and the heating process is isolated with the air completely, and no safety risk does not have the heat waste that indirect heating brought simultaneously, and the thermal efficiency is high, can ensure to discharge behind the heating temperature to exhaust duct. Tests prove that when the environmental temperature is low and the BOG gas flow is large in winter, the medium temperature of the low-temperature pipeline can reach more than 10 ℃ after being heated by the reheater. The double-heater has simple structure, low manufacture cost of the shell and low purchase cost of the electric heating element, so the whole double-heater is economical and practical.
Claims (3)
1. An economical LNG double heat ware which characterized in that: the BOG low-temperature gas heating device comprises a shell and an electric heating element arranged in the shell, wherein the shell is provided with a BOG low-temperature gas inlet connecting pipe, a high-temperature gas outlet and an electric heating element socket;
the shell is vertically arranged, flanges are respectively arranged at two ends of the shell, and the BOG low-temperature gas inlet connecting pipe is arranged at the lower part of the shell and communicated with a BOG steam outlet of the LNG storage tank;
the electric heating element is a flange type stainless steel electric heating pipe and is inserted from the lower end of the shell, and a flange of the electric heating element is hermetically connected with a flange at the lower end of the shell;
a temperature transmitter is arranged at a position close to the upper end port in the shell.
2. The economical LNG recuperator of claim 1, wherein: the upper end of shell is the high temperature gas exit end, and sealing connection has exhaust duct, and exhaust duct's end-to-end connection has the governing valve, and the end-to-end connection of governing valve is to the pipeline of LNG storage tank.
3. The economical LNG recuperator of claim 2, wherein: the exhaust pipeline comprises two symmetrically arranged 90-degree elbows and a horizontal connecting pipe between the two elbows, wherein the lower end of the 90-degree elbow on one side is connected with the upper end flange of the shell in a sealing mode through a flange, the lower end of the other 90-degree elbow is connected with a vertical pipe, and the lower end of the vertical pipe is connected with the regulating valve through a third 90-degree elbow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220086012.0U CN216743830U (en) | 2022-01-13 | 2022-01-13 | Economical LNG (liquefied Natural gas) reheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220086012.0U CN216743830U (en) | 2022-01-13 | 2022-01-13 | Economical LNG (liquefied Natural gas) reheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216743830U true CN216743830U (en) | 2022-06-14 |
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ID=81914957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220086012.0U Active CN216743830U (en) | 2022-01-13 | 2022-01-13 | Economical LNG (liquefied Natural gas) reheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216743830U (en) |
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2022
- 2022-01-13 CN CN202220086012.0U patent/CN216743830U/en active Active
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