High-pressure isolation type gas heat exchanger

Abstract

A high-pressure isolation type gas heat exchanger comprises an equipment barrel, a gas outlet and a gas inlet are formed in the equipment barrel, a heat exchange tube is arranged in the equipment barrel, the end of the equipment barrel is welded to one side of an equipment tube plate, and the other side of the equipment tube plate is welded to a heat conduction oil cavity. One end of the electric heating tube is communicated with the explosion-proof wiring cavity, and the other end of the electric heating tube penetrates through the heat-conducting oil cavity and the equipment tube plate and then is inserted into the heat exchange tube; a heat conduction oil medium enters the heat conduction oil cavity from the outside and then enters the heat exchange tube; a medium to be heated enters the cylinder through the gas inlet and is output through the gas outlet. By means of the structure, the high-pressure isolation type gas heat exchanger is high in safety performance and low in manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment, and in particular relates to a high-pressure isolation type gas heat exchanger. Background Art

[0002] Gas heat exchanger in this article refers to gas electric heating heat exchanger. Normally, the consumed electrical energy is converted into thermal energy to heat the material to be heated. During operation, the low-temperature fluid medium enters its input port through a pipeline under pressure, and along the specific heat exchange flow channel inside the electric heating container, the path designed using the principles of fluid mechanics and heat transfer is used to take away the high-temperature heat energy generated by the electric heating element during operation, thereby increasing the temperature of the heated medium. Ultimately, the purpose of transferring heat from the hot fluid to the cold fluid is achieved, and a device that meets the requirements of the process regulations is manufactured. Gas electric heating heat exchanger is an industrial application of convective heat transfer and heat conduction.

[0003] In long-distance natural gas pipelines, gas electric heating heat exchangers are an indispensable device with a wide range of applications. In the long-distance transportation of natural gas, high-pressure transportation is the most economical choice. However, in the actual transportation process, due to the long transportation distance and the need to reduce the pressure in the middle of the pipeline, the temperature of the gas will decrease when the pressure is reduced, which is very likely to cause ice blockage in equipment and pipelines. The basic principle of the existing gas electric heating heat exchanger is that after the natural gas enters the electric heater, the traditional electrical energy is converted into thermal energy to heat the natural gas.

[0004] At present, the traditional gas electric heating heat exchanger uses an electric heater heating tube to directly contact the natural gas; the electric heater and the equipment are connected by flanges and bolts. When used under high pressure, the electric heater heating tube is prone to rupture and poor sealing at the flange connection, causing gas leakage. In addition, since the traditional electric heater heating tube is an integral structure, once it ruptures, the effective electrical power is reduced and the equipment efficiency is reduced, so it needs to be replaced as a whole. In the process of replacing the electric heater, the operation is difficult, time-consuming, and labor costs are high. Sometimes the system needs to be shut down for maintenance and replacement. Summary of the invention

[0005] The utility model provides a high-pressure isolation type gas electric heating heat exchanger to solve the problems of poor sealing effect, easy breakage and damage, and low use efficiency in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows: a high-pressure isolated gas heat exchanger, including an equipment cylinder, a gas outlet and a gas inlet are provided on the equipment cylinder, and a heat exchange tube is provided in the equipment cylinder. The end of the equipment cylinder is welded to one side of the equipment tube sheet, and the other side of the equipment tube sheet is welded to the heat transfer oil cavity; one end of the electric heating tube is connected to the explosion-proof wiring cavity, and the other end passes through the heat transfer oil cavity and the equipment tube sheet and is inserted into the heat transfer tube; the heat transfer oil medium enters the heat transfer oil cavity from the outside and then enters the heat transfer tube; the medium to be heated enters the cylinder from the gas inlet and is output from the gas outlet.

[0007] Preferably, baffles are provided in the cylinder of the equipment, and the baffles are arranged equidistantly between the heat exchange tubes in the cylinder to support the heat exchange tubes and ensure the stability of the device.

[0008] Preferably, one end of the heat exchange tube is welded to the equipment tube sheet, and the other end is sealed by a tube cap to ensure the safety performance of the device.

[0009] Preferably, a support is provided at the lower part of the equipment cylinder so that the entire device can be stably fixed on the ground.

[0010] The beneficial effects of the utility model are:

[0011] The utility model provides a high-pressure isolated gas-electric heat exchanger, which adopts the principle of partition-type heat exchange. The heating tube adopts a single-tube independent heating method, and heat transfer oil is filled between the heating tube and the heat exchange tube. At the same time, the pressure-bearing part tube sheet and the shell are welded, and the tube box and the equipment tube sheet are also integrally welded. Through the above structure, the integral welding of the utility model not only ensures the sealing effect of the equipment, but also eliminates the cumbersomeness of flange connection; the single-tube independent heating heat exchange tube is easy to replace and maintain, saving time and reducing costs; the use of the partition-type heat exchange principle to avoid direct contact between the heating tube and natural gas greatly improves the safety performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a schematic diagram of the heat transfer oil filling state of the tube side of the embodiment of the utility model.

[0014] Figure 3 It is a schematic cross-sectional view of the gas heat transfer process of an embodiment of the utility model.

[0015] Figure 4 It is a cross-sectional schematic diagram of the welding connection of the high-pressure heat exchanger of the embodiment of the utility model.

[0016] Figure 5 It is a cross-sectional schematic diagram of the isolation of the heating medium and the medium to be heated in the embodiment of the utility model.

[0017] Figure 6 It is a schematic diagram of an electric heating tube according to an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 A high-pressure isolated gas heat exchanger is shown, comprising an equipment cylinder 6 , on which a gas outlet 5 and a gas inlet 9 are provided. A medium 11 to be heated enters the cylinder 6 through the gas inlet 9 and is output through the gas outlet 5 .

[0020] Heat exchange tubes 8 are arranged in the equipment barrel 6, and the heat transfer oil medium 10 enters the heat transfer oil cavity 3 from the outside, and then enters the heat exchange tubes 8. The end of the equipment barrel 6 is welded to one side of the equipment tube sheet 4, and the other side of the equipment tube sheet 4 is welded to the heat transfer oil cavity 3. One end of the electric heating tube 2 is connected to the explosion-proof wiring cavity 1, and the other end passes through the heat transfer oil cavity 3 and the equipment tube sheet 4, and is inserted into the heat exchange tube 8. One end of the heat exchange tube 8 is welded to the equipment tube sheet 4, and the other end is sealed by a pipe cap to ensure the safety performance of the device. Baffles 7 are arranged in the equipment barrel 6 at equal distances between the heat exchange tubes 8 in the barrel 6, which support the heat exchange tubes 8 and ensure the stability of the device. Support members are provided at the bottom of the equipment barrel 6, so that the entire device can be stably fixed on the ground.

[0021] When used specifically:

[0022] according to Figure 2 As shown, the heat transfer oil is injected into the heat transfer tube 8 through the heat transfer oil cavity 3, and the electric heating part is started. The heating tube converts the electrical energy into heat energy for the heat transfer oil. The gas is introduced into the gas inlet 9, and the heat energy of the outer wall of the heat transfer tube 8 heats the gas. Figure 3 Heat conduction is achieved as shown. Figure 5 The wall heat exchange principle is used to solve the problem of the local heat load exceeding the design heat load caused by the traditional electric heating tube directly heating the gas, thus improving the safety performance of the equipment. Figure 6 The single-tube independent heating heat exchange tube shown is easy to replace and maintain, saving time and reducing costs. The gas that finally reaches the temperature required by the process flows out through the gas outlet 5 and enters the next process system.

[0023] In addition, if Figure 4As shown, the equipment tube sheet 4 is directly welded to the tube box group in the heat transfer oil cavity 3. Compared with the traditional flange connection equipment, it is not complicated, reduces the production cost, and eliminates the problem of unsatisfactory gasket sealing effect in flange connection.

Claims

1. A high-pressure isolated gas heat exchanger, comprising a device cylinder (6), a gas outlet (5) and a gas inlet (9) being provided on the device cylinder (6), a heat exchange tube (8) being provided inside the device cylinder (6), characterized in that: The end of the equipment barrel (6) is welded to one side of the equipment tube sheet (4), and the other side of the equipment tube sheet (4) is welded to the heat transfer oil cavity (3); one end of the electric heating tube (2) is connected to the explosion-proof wiring cavity (1), and the other end passes through the heat transfer oil cavity (3) and the equipment tube sheet (4) and is inserted into the heat exchange tube (8); the heat transfer oil medium (10) enters the heat transfer oil cavity (3) from the outside and then enters the heat exchange tube (8); the medium to be heated (11) enters the barrel (6) from the gas inlet (9) and is output from the gas outlet (5).

2. A high-pressure isolated gas heat exchanger according to claim 1, characterized in that: The equipment cylinder (6) is provided with baffles (7), which are arranged at equal distances between the heat exchange tubes (8) in the cylinder (6) to support the heat exchange tubes (8).

3. A high-pressure isolated gas heat exchanger according to claim 1, characterized in that: One end of the heat exchange tube (8) is welded to the equipment tube sheet (4), and the other end is sealed by a tube cap.

4. A high-pressure isolated gas heat exchanger according to claim 1, characterized in that: A support is provided at the lower part of the equipment cylinder (6).

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