CN211575524U

CN211575524U - High-performance gas heater

Info

Publication number: CN211575524U
Application number: CN201921892238.4U
Authority: CN
Inventors: 张华芹; 程佳彪; 李广敏
Original assignee: Shanghai Rhyme New Energy Technology Co ltd
Current assignee: Shanghai Rhyme New Energy Technology Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-09-25
Anticipated expiration: 2029-11-05

Abstract

The utility model discloses a high performance gas heater, including shell and the inner tube of setting in the shell, be equipped with cold gas inlet pipe and hot gas outlet pipe on the shell, be equipped with between shell and the inner tube and preheat the passageway, be equipped with heating element in the inner tube, heating element includes a plurality of heating pipes, the wall thickness top-down of heating pipe is linear increase along the pipe length direction. The utility model provides a pair of high performance gas heater, set up through shell and inner tube and preheat the passageway, reduce inner tube wall surface temperature on the one hand when letting in cold gas entering preheating the passageway, on the other hand still can make the hot gas preheating of inner chamber, in the cold gas that preheats gets into the heating tube by the upper end of inner tube again, because the wall thickness top-down of heating tube is linear increase along the pipe length direction, the temperature top-down of heating tube progressively risees under the circular telegram condition, thereby can progressively heat the cold gas that flows, the heat transfer coefficient is bigger, high efficiency.

Description

High-performance gas heater

Technical Field

The utility model relates to an electric heater technical field especially relates to a high performance gas heater.

Background

In the industrial test and production process of aviation, aerospace, ships, chemical industry and the like, a stable large-flow high-temperature high-pressure gas source is sometimes needed. The gas electric heater heats a gas source to required temperature and pressure by utilizing the principle that electric energy is converted into heat energy.

In the prior art, a high-power gas heater generally adopts a working principle similar to a tubular heat exchanger, a thin-walled tube made of a high-temperature resistant resistance alloy material is used as a heating body, when electric power acts on the thin-walled tube, the thin-walled tube generates heat after being conducted, and cold gas to be heated flows through the thin-walled tube to perform convective heat exchange, so that the cold gas is heated. The heating mode is rapid, but the heating mode is influenced by the current density and the surface heat load of the thin-wall pipe, and has low heating efficiency, poor mechanical property, large thermal inertia, unstable adjustment and the like. Especially when the air source flow is large, the temperature difference along the tube pass can reach 1000 ℃ (normal temperature-1000 ℃), the temperature gradient is large, the thin-wall tube realizes large-power surface load loading difficulty, and the thin-wall tube is not economical.

SUMMERY OF THE UTILITY MODEL

In view of the prior art has the aforesaid not enough, the utility model provides a high performance gas heater can provide an efficient, thermal inertia is little, mechanical properties is good, adjust stable and the high gas electric heater of energy utilization.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

the utility model provides a high performance gas heater, includes the shell and sets up the inner tube in the shell, be equipped with cold gas inlet pipe and hot gas outlet pipe on the shell, be equipped with the passageway of preheating between shell and the inner tube, be equipped with heating element in the inner tube, heating element includes a plurality of heating pipes, the wall thickness top-down of heating pipe is linear increase along the pipe length direction.

According to an aspect of the utility model, the heating pipe is the bare pipe of thin wall that high temperature resistance alloy material made.

According to the utility model discloses an aspect, be equipped with a plurality of splint of difference vertical fixation on the inner tube inner wall in the inner tube, the parallel interlude of heating pipe interval is in between a plurality of splint.

According to an aspect of the present invention, the number of the heating pipes is set to be a plurality, and the plurality of heating pipes are arranged in a circular concentric manner, a triangular manner, or a regular polygonal manner.

According to an aspect of the present invention, an electrode assembly is disposed on the housing, the electrode assembly includes an electrode flexible connecting sheet, and the tail of the heating pipe is connected to the electrode flexible connecting sheet to form a U-shaped loop.

According to an aspect of the utility model, the electrode flexible connection piece adopts the three-phase star type with the heating pipe to be connected.

In accordance with one aspect of the present invention, the housing may be a full jacket or a semi-enclosed cooling jacket structure.

The utility model discloses the advantage of implementing: set up through shell and inner tube and preheat the passageway, avoid cooling the inner tube through the cold gas on the one hand when letting in the cold gas entering and preheat the passageway, reduce inner tube wall surface temperature, thereby on the other hand still can make the hot gas of inner chamber carry out the heat transfer to the cold gas of import and preheat the processing, thereby improve energy utilization, the cold gas through preheating gets into in the heating tube by the upper end of inner tube again, heat through the heating pipe, because the wall thickness top-down of heating pipe is linear increase along the pipe length direction, the temperature top-down of heating pipe progressively risees under the circular telegram condition, thereby can progressively heat the cold gas that flows, the coefficient of heat transfer is bigger, high efficiency, the weight of heating pipe has still been reduced when improving heating efficiency simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a high performance gas heater according to the present invention;

fig. 2 is a schematic view of the top view structure inside the cylinder of the high performance gas heater of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, a high performance gas heater comprises a housing 1 and an inner tube 2 disposed in the housing 1, wherein the housing 1 comprises an upper head, a barrel and a lower head, the upper head and the lower head are respectively connected to two ends of the barrel through an upper head sealing flange assembly and a lower head sealing flange assembly, the housing 1 is provided with a cold gas inlet tube 5 and a hot gas outlet tube 4, the ends of the upper head and the lower head are respectively connected to the cold gas inlet tube 5 and the hot gas outlet tube 4, a preheating channel is disposed between the housing 1 and the inner tube 2, a heating assembly is disposed in the inner tube 2, the heating assembly comprises a plurality of heating tubes 6, the wall thickness of the heating tubes 6 is linearly increased from top to bottom along the tube length direction, the preheating channel is disposed through the housing 1 and the inner tube 2, when the cold gas enters the preheating channel, on one hand, the inner tube 2 is prevented from being cooled by, the wall surface temperature of the inner cylinder 2 is reduced, and on the other hand, the hot gas in the inner cavity can exchange heat with the cold gas at the inlet so as to preheat, thereby improving the energy utilization rate; the preheated cold gas enters the heating pipe 6 from the upper end of the inner cylinder 2 and is heated by the heating pipe 6, the wall thickness of the heating pipe 6 is linearly increased from top to bottom along the length direction of the pipe, the heat load loaded on the heating pipe 6 is increased in a linear relation under the power-on condition, so that the temperature of the heating pipe 6 is gradually increased from top to bottom, the flowing cold gas can be gradually heated, the heat transfer coefficient is larger, the heat taken away in unit time is more, and the difference between the average temperature of the thin wall of the heating pipe 6 and the average temperature of the gas is small, which indicates that the efficiency of the electric heater is high; meanwhile, the weight of the heating pipe 6 is reduced while the heating efficiency is improved.

In practical application, the heating pipe 6 is a thin-wall bare pipe made of a high-temperature-resistant resistance alloy material, the material includes but is not limited to a high-temperature-resistant stainless steel pipe, an iron-aluminum alloy and a nickel-chromium alloy, because the heating pipe 6 adopts a non-equal-diameter high-temperature alloy steel pipe, the wall thickness is increased along with the temperature rise, the wall thickness of the low-temperature section pipe is thin, the resistance of the solid metal is light, and the heat capacity is very small; in addition, the heat exchange with the gas is realized by forced convection heat exchange inside and outside the pipe, so that the thermal inertia of the gas is smaller than that of other resistance materials, the temperature rising and falling rate can reach 3K/s, the thermal inertia is small, the temperature rising and falling rate is high, the accurate and stable control can be realized by utilizing the silicon controlled rectifier, and the temperature control drift is not determined due to the temperature advance and lag of the controlled gas.

In practical application, be equipped with a plurality of splint 7 of difference vertical fixation on inner tube 2 inner wall in the inner tube 2, heating pipe 6 interval parallel interlude is in between a plurality of splint 7 to carry out the fixed stay to heating pipe 6, guaranteed holistic stability.

In practical application, the number of the heating pipes 6 is set to be a plurality, and the heating pipes 6 are arranged in a circular concentric manner, a triangular manner or a regular polygon manner, so that three-phase connection of electrodes is facilitated, and heating uniformity is facilitated.

In practical application, be equipped with electrode assembly 8 on shell 1, electrode assembly 8 sets up in inner tube 2 upper end, and power supply enters into heating pipe 6 through sealed electrode assembly 8 at the upper end and makes it generate heat, and although there is high temperature, high pressure, high-speed air current to pass through, its relative environmental change is not big, and under the state that high, low temperature changes, used material repeatedly still can keep original mechanical properties, can ensure that heater long service life, the security is high, electrode assembly 8 includes electrode flexible connecting piece 9, the afterbody of heating pipe 6 passes through electrode flexible connecting piece 9 and links to each other and form U type return circuit.

In practical application, the electrode flexible connecting sheets 9 and the heating pipes 6 are connected in a three-phase star shape, and a plurality of heating pipes 6 can be connected in series or in parallel through the electrode flexible connecting sheets 9 so as to achieve the process purpose.

In practical application, the shell 1 can adopt a full jacket or semi-surrounding type cooling jacket structure, and the high-temperature shell is cooled by jacket cooling water, so that the safe temperature of the ultra-large ultra-high-temperature shell is ensured.

In practical application, the shell 1 is also provided with a temperature measuring port 3, and a temperature sensor can be arranged in the temperature measuring port 3, so that the temperature can be conveniently detected in real time. The utility model discloses the advantage of implementing: set up through shell and inner tube and preheat the passageway, avoid cooling the inner tube through the cold gas on the one hand when letting in the cold gas entering and preheat the passageway, reduce inner tube wall surface temperature, thereby on the other hand still can make the hot gas of inner chamber carry out the heat transfer to the cold gas of import and preheat the processing, thereby improve energy utilization, the cold gas through preheating gets into in the heating tube by the upper end of inner tube again, heat through the heating pipe, because the wall thickness top-down of heating pipe is linear increase along the pipe length direction, the temperature top-down of heating pipe progressively risees under the circular telegram condition, thereby can progressively heat the cold gas that flows, the coefficient of heat transfer is bigger, high efficiency, the weight of heating pipe has still been reduced when improving heating efficiency simultaneously.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a high performance gas heater, includes the shell and sets up the inner tube in the shell, be equipped with cold gas inlet pipe and hot gas outlet pipe on the shell, its characterized in that, be equipped with between shell and the inner tube and preheat the passageway, be equipped with heating element in the inner tube, heating element includes a plurality of heating pipes, the wall thickness top-down of heating pipe is linear increase along the pipe length direction.

2. The high performance gas heater of claim 1, wherein the heating tube is a thin-walled bare tube made of a high temperature resistant resistive alloy material.

3. The high performance gas heater of claim 1, wherein the inner cylinder is provided therein with a plurality of clamping plates vertically fixed to an inner wall of the inner cylinder, respectively, and the heating pipes are inserted in parallel at intervals between the plurality of clamping plates.

4. The high performance gas heater of claim 1, wherein the number of the heating pipes is set to be plural, and the plural heating pipes are arranged in a regular polygon or concentric circles.

5. The high performance gas heater of claim 1, wherein the housing has an electrode assembly comprising flexible electrode tabs, and the heating tube has a tail portion connected to the flexible electrode tabs to form a U-shaped loop.

6. The high performance gas heater of claim 5, wherein the electrode flexible tabs are connected to the heating tube in a three-phase star configuration.

7. A high performance gas heater according to any one of claims 1 to 5, wherein the housing is a full jacket or a semi-surrounding cooling jacket structure.