CN210107028U

CN210107028U - High-pressure economical natural gas electric heater

Info

Publication number: CN210107028U
Application number: CN201920695595.5U
Authority: CN
Inventors: 顾秀彬; 郭道荣; 黄贤江
Original assignee: ZHENJIANG LIFAN EXPLOSION-PROOF EXPLOSION-PROOF ELECTRICAL APPLIANCE Co Ltd
Current assignee: ZHENJIANG LIFAN EXPLOSION-PROOF EXPLOSION-PROOF ELECTRICAL APPLIANCE Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-02-21
Anticipated expiration: 2029-05-13

Abstract

The utility model relates to a high-pressure economic type natural gas electric heater belongs to natural gas facility technical field, and the essential element has U type electrothermal tube, container, sleeve pipe, gathers oil chamber, wiring chamber tube sheet B, tube sheet flange B, tetrafluoro pad, fastening screw, and the characteristic is: one end of the sleeve is closed, the other end of the sleeve is made of S30408 stainless steel, the U-shaped electric heating tube extends into the sleeve, heat conducting oil in the oil gathering chamber flows into the sleeve, two wiring ends of the U-shaped electric heating tube extend into two through holes of the fastening screw, and external threads of the fastening screw are matched with internal threads on the wiring cavity tube plate B. The U-shaped electric heating tube generates heat after being electrified, and the heat is transferred to the container to heat the high-pressure natural gas. The high-pressure natural gas does not directly contact the U-shaped electric heating tube, the U-shaped electric heating tube is not easy to damage, safety accidents cannot occur, the U-shaped electric heating tube can be conveniently replaced singly, and the economic benefit is high.

Description

High-pressure economical natural gas electric heater

Technical Field

The utility model relates to a high-pressure economic natural gas electric heater belongs to natural gas facility technical field.

Background

The natural gas in the gas storage tank is input into a pipeline by a high-pressure pump and is conveyed to a user. The natural gas in the pipeline has low temperature and poor fluidity and needs to be heated to 60 ℃ by a common electric heater. The prior technical scheme is as follows: high-pressure natural gas enters the container from the gas inlet, and the natural gas is heated by the U-shaped electric heating pipe and then is conveyed to each user from the gas outlet. The outer wall of the U-shaped electric heating tube is sleeved with a mounting sleeve, the outer wall of one end face of the mounting sleeve is welded with the end face of the tube plate flange A, the outer wall of the other end of the mounting sleeve is welded with the tube plate A of the wiring cavity, and the outer wall of a wiring end of the U-shaped electric heating tube is welded with the outer wall of the mounting sleeve. The natural gas pressure in the container is up to 4Mpa, the high-pressure natural gas is directly contacted with the U-shaped electric heating tube in the container, the U-shaped electric heating tube which generates heat is easy to damage under high pressure, and safety accidents occur. The damaged U-shaped electric heating tubes cannot be detached and replaced individually, all the U-shaped electric heating tubes and the wiring cavity must be detached and replaced integrally, the U-shaped electric heating tubes are scrapped integrally, and economic loss is large.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: and circular tubes with the same number as the U-shaped electric heating tubes are designed, one end of each circular tube is closed, the other end of each circular tube is provided with a through hole, and the outer wall of one end of each through hole is welded on the end face of the tube plate flange B. The number of the fastening screws is the same as that of the U-shaped electric heating tubes, two through holes matched with the U-shaped electric heating tubes are drilled on the end faces of the fastening screws, and the inner diameter of each through hole is slightly larger than the outer diameter of each U-shaped electric heating tube. And milling holes in the wiring cavity tube plate B, wherein the number of the milled holes is the same as that of the U-shaped electric heating tubes, and internal threads are tapped in the holes and matched with external threads of the fastening screws. The fastening screw is sleeved with a tetrafluoro pad. Two wiring ends of the U-shaped electric heating tube extend into two through holes in the fastening screws, external threads of the fastening screws are screwed into internal threads of the wiring cavity tube plate B, the U-shaped electric heating tube is fastened in the internal threads of the wiring cavity tube B, the U-shaped electric heating tube is fastened on the wiring cavity tube B, then the outer wall of the U-shaped electric heating tube is welded with the wall of the through hole on the outer hexagonal end face of the fastening screw, and sealing of the outer wall of the U-shaped electric heating tube and the inner walls of the two through holes of the fastening screws is guaranteed. After the U-shaped electric heating tube is used for a long time, if one U-shaped electric heating tube is damaged, the damaged U-shaped electric heating tube can be conveniently taken out together with the fastening screw for replacement as long as the fastening screw on the U-shaped electric heating tube is loosened. And heat conduction oil enters the oil gathering chamber from the oil injection tank, and the heat conduction oil in the oil gathering chamber flows into the sleeve and is filled on the outer wall of the U-shaped electric heating tube. When the U-shaped electric heating tube is electrified and heated, heat is transferred to the heat conducting oil, the heat of the heat conducting oil is transferred to the wall of the circular tube, the heat on the wall of the circular tube is dissipated into the container, and when high-pressure natural gas enters the container from the air inlet, the heat in the container heats the natural gas and is conveyed to each user from the air outlet.

By adopting the technical scheme, the effect is obvious:

1. the high-pressure natural gas does not directly contact the U-shaped electric heating tube, the U-shaped electric heating tube is not easy to damage, and safety accidents can not occur.

2. After the U-shaped electric heating tubes are used for a long time, if one U-shaped electric heating tube is damaged, the U-shaped electric heating tube can be conveniently replaced, the phenomenon that all the U-shaped electric heating tubes are integrally scrapped together with the wiring cavity is avoided, and the economic benefit is high.

Drawings

FIG. 1 is a schematic view of an electric heater for natural gas according to the prior art

FIG. 2 is a schematic view of a high-pressure economical natural gas electric heater

In the figure: 1. the device comprises a wiring cavity 2, an over-temperature sensor 3, a tube plate flange A4, a container flange 5, a fixing plate 6, a U-shaped electric heating tube 7, a container 8, an outlet temperature measuring sensor 9, a mounting sleeve 10, a wiring cavity tube plate A11, a sleeve 12, an oil collecting chamber 13, an oil injection tank 14, a wiring cavity tube plate B15, a tube plate flange B16, a tetrafluoro pad 17 and fastening screws

Detailed Description

Referring to fig. 1 and 2, the utility model relates to a high-pressure economic natural gas electric heater has welded container flange 4, air inlet, gas outlet, drain on the container 7, and container flange 4 is connected with tube sheet flange B15 with the screw, and the outer wall welding of the through-hole one end of sleeve pipe 11 is on tube sheet flange B15's left end face, and U type electrothermal tube 6 stretches into in the sleeve pipe 11. Two wiring ends of the U-shaped electric heating tube 6 extend into two through holes of the fastening screw 17, the polytetrafluoroethylene pad 16 is sleeved on the fastening screw 17, the external thread of the fastening screw 17 is matched with the internal thread of the wiring cavity tube plate B14, the fastening screw 17 is screwed, the U-shaped electric heating tube 6 is fixed on the wiring cavity tube plate B15, the fastening screw 17 is unscrewed, and the U-shaped electric heating tube 6 is loosened and taken out from the wiring cavity tube plate B15.

Claims

1. A high-pressure economical natural gas electric heater mainly comprises the following components: u type electrothermal tube (6), container (7), sleeve pipe (11), oil gathering room (12), wiring chamber tube sheet B (14), tube sheet flange B (15), tetrafluoro pad (16), fastening screw (17), its characterized in that: one end of the sleeve (11) is closed, the other end of the sleeve is provided with a through hole, the U-shaped electric heating tube (6) extends into the sleeve (11), heat conducting oil in the oil gathering chamber (12) flows into the sleeve (11) and is filled on the outer wall of the U-shaped electric heating tube (6), two wiring ends of the U-shaped electric heating tube (6) extend into two through holes of the fastening screw (17), the polytetrafluoroethylene pad (16) is sleeved on the fastening screw (17), and external threads of the fastening screw (17) are matched with internal threads on the wiring cavity tube plate B (14).

2. The high pressure economic natural gas electric heater of claim 1, wherein: when the U-shaped electric heating tube (6) is electrified and heated, heat is transferred to the heat-conducting oil, and then is transferred to the container (7) through the outer wall of the sleeve (11) to heat the high-pressure natural gas.

3. The high pressure economic natural gas electric heater of claim 1, wherein: the U-shaped electric heating tube (6) is fixed on the wiring cavity tube plate B (14) by screwing down the fastening screw (17), and the U-shaped electric heating tube (6) can be taken out from the wiring cavity tube plate B (14) by unscrewing the fastening screw (17).

4. The high pressure economic natural gas electric heater of claim 1, wherein: the sleeve (11) is made of an S30408 stainless steel tube.