High-temperature energy-saving crude oil heating and heat exchange device

Abstract

The utility model belongs to the field of petroleum crude oil heating, and particularly relates to a high-temperature energy-saving crude oil heating and heat exchanging device which comprises a heat pump body and a shell-and-tube gas-oil heat exchanger, and an expansion valve, an evaporator and a compressor which are sequentially communicated through a pipeline are arranged in the heat pump body. Two ends of a titanium alloy heat exchange tube in the shell-and-tube gas-oil heat exchanger are respectively communicated with a gas outlet of the compressor and a gas inlet of the expansion valve; and high-temperature and high-pressure gas in the titanium alloy heat exchange tube exchanges heat with crude oil in the tube shell. High-temperature and high-pressure gas with the temperature higher than 95 DEG C from the compressor sequentially enters the gas inlet pipe, the left end socket and the titanium alloy heat exchange pipes through the copper pipe to heat the titanium alloy heat exchange pipes, and the heated titanium alloy heat exchange pipes heat crude oil entering the inner cavity of the pipe shell through the oil inlet pipe connector. Crude oil heated to 80 DEG C enters a crude oil conveying pipeline through the oil outlet pipe joint, so that the heating of the crude oil is completed, and the device is suitable for oil fields in high-altitude severe cold areas.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of petroleum crude oil heating, especially relates to a high-temperature energy-saving crude oil heating and heat exchange device. BACKGROUND

[0002] Most of Chinese crude oil contains high wax (high molecular weight alkanes), which is very viscous at room temperature, making it difficult to transport. For example, Daqing crude oil, which accounts for about one-third of China's output, contains about 26% wax and has a freezing point of up to 32 degrees Celsius. After heating, the thermal motion of the crude oil molecules is enhanced, and the mutual restraint between them is weakened. On the one hand, it makes liquid hydrocarbons thinner and can dissolve more wax; on the other hand, it makes the sponge-like wax structure loose and disintegrated, and forms many small particles of wax distributed in liquid hydrocarbons. Solid hydrocarbons become dispersed phase, and liquid hydrocarbons become continuous phase, so that crude oil can flow along the pipeline for transportation.

[0003] A crude oil heating device with application number 202320882318.1 is disclosed, which includes an air energy heat pump, a water-oil heat exchanger, an air-oil heat exchanger, a solar heat collector, and a ground source heat exchanger. The water outlet pipe and the water inlet pipe of the air energy heat pump are connected to the water-oil heat exchanger to form a closed heat exchange loop. The water-oil heat exchanger has a heat exchanger tube inside, and the two ends of the heat exchanger tube are connected to the heat exchanger oil pipe to complete water-oil heat exchange. However, water-oil heat exchange cannot heat crude oil to 75°C in high-altitude cold regions, and cannot meet the needs of oilfields in high-altitude cold regions. SUMMARY

[0004] The high-temperature energy-saving crude oil heating and heat exchange device proposed by the utility model can heat crude oil to a temperature as high as 80°C by using high-pressure and high-temperature gas, thereby solving the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A high-temperature energy-saving crude oil heating and heat exchange device includes a heat pump body and a tube-shell gas-oil heat exchanger. The heat pump body is provided with an expansion valve, an evaporator, and a compressor connected in sequence by a pipeline,

[0007] The two ends of the heat exchange tube in the tube-shell gas-oil heat exchanger are connected to the gas outlet of the compressor and the gas inlet of the expansion valve, respectively.

[0008] The tube shell of the tube-shell gas-oil heat exchanger is connected to the crude oil pipeline, and the high-temperature and high-pressure gas in the heat exchange tube exchanges heat with the crude oil in the tube shell.

[0009] Preferably, the tube-shell gas-oil heat exchanger includes a hollow tube shell, the two ends of the tube shell are sealed plates, and a plurality of heat exchange tubes penetrating the two sealed plates are arranged in the tube shell along the length direction of the tube shell.

[0010] The left end cover and the right end cover are connected to the heat exchange tube through flanges;

[0011] The left end cover is communicated with an air inlet pipe, and the right end cover is communicated with an air outlet pipe;

[0012] The top of the tube shell is communicated with an oil inlet pipe joint, and the bottom is communicated with an oil outlet pipe joint.

[0013] The utility model discloses the beneficial effects are:

[0014] The utility model discloses the high temperature and high pressure gas of 95 DEG C above from the compressor enters the air inlet pipe, left end cover and a plurality of heat exchange tubes in proper order through copper pipe and heats the heat exchange tube, and the heat exchange tube after being heated heats the crude oil that enters the tube shell inner chamber through the oil inlet pipe joint, and the crude oil that is heated to 80 DEG C enters the crude oil delivery pipeline through the oil outlet pipe joint, and then the heating of the crude oil is completed, and the oil field in high altitude and severe cold area is suitable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the utility model.

[0016] Figure 2 It is the structure schematic diagram of the utility model tube shell type gas oil heat exchanger.

[0017] Figure 3 It is the structure schematic diagram of the utility model tube shell type gas oil heat exchanger.

[0018] Figure 4 It is the structure schematic diagram of the utility model heat exchange tube.

[0019] Figure 5 It is the position structure schematic diagram of the utility model sealing plate.

[0020] In the drawing: 1-heat pump body, 101-evaporator, 102-compressor, 103-expansion valve, 2-tube shell type gas oil heat exchanger, 21-tube shell, 22-sealing plate, 23-left end cover, 24-right end cover, 25-air inlet pipe, 26-air outlet pipe, 27-oil inlet pipe joint, 28-oil outlet pipe joint, 29-heat exchange tube. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Refer to Figures 1-5The utility model provides a kind of high-temperature energy-saving crude oil heating heat exchange device, including heat pump body 1 and tube-shell gas-oil heat exchanger 2, heat pump body 1 is provided with expansion valve 103, evaporator 101 and compressor 102 connected by copper pipe in sequence.

[0023] Wherein heat pump body 1 can be air energy heat pump, water source heat pump and any natural energy heat pump, and the preferred embodiment is air energy heat pump.

[0024] Tube-shell gas-oil heat exchanger 2 includes internally hollow tube shell 21, the both ends of tube shell 21 are sealing plate 22, and a plurality of titanium alloy heat exchange pipes 29 are arranged in tube shell 21 along the length direction thereof and penetrate through two sealing plates 22; tube shell 21 is connected with left head 23 and right head 24 through flange at left and right ends, and left head 23 and right head 24 are communicated with titanium alloy heat exchange pipes 29; left head 23 is communicated with air inlet pipe 25, and right head 24 is communicated with air outlet pipe 26; the top of tube shell 21 is communicated with oil inlet pipe joint 27, and the bottom is communicated with oil outlet pipe joint 28, and oil inlet pipe joint 27 and oil outlet pipe joint 28 are connected on crude oil conveying pipeline.

[0025] The air outlet of compressor 102 is communicated with air inlet pipe 25 through copper pipe, air inlet pipe 25 is communicated with left head 23, left head 23 is communicated with the air inlet end of a plurality of titanium alloy heat exchange pipes 29, the air outlet end of a plurality of titanium alloy heat exchange pipes 29 is communicated with right head 24, right head 24 is communicated with air outlet pipe 26, and air outlet pipe 26 is communicated with expansion valve 103 through copper pipe, forming a closed loop.

[0026] After the high-temperature and high-pressure gas in a plurality of titanium alloy heat exchange pipes 29 completes heat exchange, it becomes low-temperature and low-pressure gas and returns to expansion valve 103 to become low-temperature and low-pressure gas in evaporator 101, and then the gas is pressurized by compressor 102 to become high-temperature and high-pressure gas.

[0027] Crude oil conveying pipeline is communicated with the inner cavity of tube shell 21 through oil inlet pipe joint 27, and the crude oil heated in the inner cavity of tube shell 21 is communicated with conveying pipeline through oil outlet pipe joint 28, so that the heated crude oil can continue to be conveyed forward.

[0028] The high-temperature and high-pressure gas above 95 DEG C from the compressor is sequentially introduced into air inlet pipe 25, left head 23 and a plurality of titanium alloy heat exchange pipes 29 through copper pipe to heat the titanium alloy heat exchange pipes 29, the heated titanium alloy heat exchange pipes 29 heat the crude oil entering the inner cavity of tube shell 21 through oil inlet pipe joint 27, the crude oil heated to 80 DEG C enters crude oil conveying pipeline through oil outlet pipe joint 28, and then the heating of the crude oil is completed, which is suitable for oil field use in high-altitude and severe cold regions.

[0029] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high-temperature energy-saving crude oil heating heat exchange device, comprising a heat pump body (1) and a tube-shell gas-oil heat exchanger (2), the heat pump body (1) is provided with an expansion valve (103), an evaporator (101) and a compressor (102) connected in sequence by pipelines, characterized in that: the heat exchange tube (29) in the tube-shell gas-oil heat exchanger (2) is connected with the gas outlet of the compressor (102) and the gas inlet of the expansion valve (103) respectively; the tube shell (21) of the tube-shell gas-oil heat exchanger (2) is connected with the crude oil pipeline, and the high-temperature and high-pressure gas in the heat exchange tube (29) exchanges heat with the crude oil in the tube shell (21).

2. The high-temperature energy-saving crude oil heating heat exchanger according to claim 1, characterized in that: The tube-shell gas-oil heat exchanger (2) comprises a hollow tube shell (21), the two ends of the tube shell (21) are sealing plates (22), and a plurality of heat exchange tubes (29) penetrating the two sealing plates (22) are arranged in the tube shell (21) along the length direction of the tube shell (21); the left end and the right end of the tube shell (21) are connected with a left end cover (23) and a right end cover (24) through flanges, the left end cover (23) and the right end cover (24) are connected with the heat exchange tube (29); the left end cover (23) is connected with an air inlet pipe (25), and the right end cover (24) is connected with an air outlet pipe (26); the top of the tube shell (21) is connected with an oil inlet pipe joint (27), and the bottom is connected with an oil outlet pipe joint (28), the oil inlet pipe joint (27) and the oil outlet pipe joint (28) are connected with the crude oil pipeline.

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