Propane gasification device

Abstract

The utility model relates to the technical field of gasification systems, in particular to a propane gasification device which comprises a vertical shell-and-tube heat exchanger, the vertical shell-and-tube heat exchanger is connected with a shell pass inlet tube, a shell pass outlet tube, a tube pass inlet tube and a tube pass outlet tube, the shell pass inlet tube is provided with an adjusting valve used for adjusting the pressure in the shell pass of the vertical shell-and-tube heat exchanger, and the tube pass outlet tube is provided with an adjusting valve used for adjusting the pressure in the tube pass of the vertical shell-and-tube heat exchanger. A pressure gauge I is arranged on the tube pass outlet tube; a pressure reducing valve for adjusting the pressure of a medium discharged by the tube pass outlet tube is arranged on the tube pass outlet tube; a pressure gauge I is positioned on one side, close to the vertical shell-and-tube heat exchanger, of the pressure reducing valve; the adjusting valve can adjust the pressure in the shell pass of the shell-and-tube heat exchanger, so that the saturation temperature of propane is adjusted, and circulating water cannot be frozen after heat release during heat exchange of propane; and the pressure reducing valve can reduce the pressure of gaseous propane, reduce the saturation temperature of propane and prevent the gaseous propane from being liquefied in cold weather.

Description

Technical Field

[0001] The utility model relates to the technical field of gasification systems, in particular to a propane gasification device. Background Art

[0002] Gaseous propane is a relatively common fuel in the chemical industry. A propane gasification device is an indispensable device for producing gaseous propane. A propane gasification device is a device that heats liquid propane in a propane gasifier until it becomes gaseous propane. The propane gasifier in the propane gasification device mostly uses a water-temperature heat exchanger and an air-temperature heat exchanger.

[0003] Air-temperature heat exchangers are greatly affected by the weather. When the temperature is low in winter, the propane vaporization volume is low and cannot meet the needs of downstream devices. When using water-temperature heat exchangers, the cold medium is liquid propane and the hot medium is circulating water. Liquid propane goes through the tube side and circulating water goes through the shell side. The problems are: 1. The circulating water will freeze after heat exchange; 2. There is liquid propane in the pipe box of the heat exchanger. The temperature of the liquid propane is low, which will cause frost and ice on the outside of the pipe box and damage the heat exchanger. Utility Model Content

[0004] The main purpose of the utility model is to provide a propane gasification device to solve the problems in the prior art that circulating water of the water-temperature heat exchanger is easy to freeze and the heat exchanger is easy to be damaged.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a propane gasification device, including a vertical shell and tube heat exchanger, the vertical shell and tube heat exchanger is connected with a shell side inlet pipe, a shell side outlet pipe, a tube side inlet pipe and a tube side outlet pipe, a regulating valve for adjusting the pressure inside the shell side of the vertical shell and tube heat exchanger is arranged on the shell side inlet pipe, and a pressure gauge is arranged on the tube side outlet pipe.

[0006] Furthermore, a pressure reducing valve for adjusting the pressure of the medium discharged from the tube-side outlet pipe is provided on the tube-side outlet pipe, and a pressure gauge is located on a side of the pressure reducing valve close to the vertical shell and tube heat exchanger.

[0007] Furthermore, the outlet pipe of the pipe side is connected to a buffer tank.

[0008] Furthermore, a temperature gauge is provided on the outlet pipe of the pipe side, and the temperature gauge is located on the side of the pressure reducing valve close to the buffer tank; and a second pressure gauge is provided on the buffer tank.

[0009] Furthermore, the vertical shell and tube heat exchanger is provided with a liquid level gauge for detecting the liquid level in the shell side thereof, and a safety valve is provided on the outlet pipe of the tube side.

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

[0011] By setting a regulating valve and a pressure gauge, the pressure in the shell side of the shell and tube heat exchanger can be adjusted, thereby adjusting the saturation temperature of propane, so that when propane is exchanging heat, the circulating water will not freeze after releasing heat; by setting a pressure reducing valve, the pressure of gaseous propane can be reduced, the saturation temperature of propane can be lowered, and the gaseous propane can be prevented from liquefying when the weather is cold. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0013] Figure 1 It is a structural schematic diagram of a propane gasification device in an embodiment;

[0014] In the figure: 1. Vertical shell and tube heat exchanger; 2. Shell side inlet pipe; 3. Shell side outlet pipe; 4. Tube side inlet pipe; 5. Tube side outlet pipe; 6. Regulating valve; 7. Pressure reducing valve; 8. Pressure gauge 1; 9. Buffer tank; 10. Thermometer; 11. Pressure gauge 2; 12. Liquid level gauge; 13. Safety valve. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0016] like Figure 1 As shown, according to an embodiment of the utility model, a propane gasification device is provided, including a vertical shell and tube heat exchanger 1, the vertical shell and tube heat exchanger 1 is connected with a shell side inlet pipe 2, a shell side outlet pipe 3, a tube side inlet pipe 4 and a tube side outlet pipe 5; a regulating valve 6 for adjusting the pressure inside the shell side of the vertical shell and tube heat exchanger 1 is arranged on the shell side inlet pipe 2, and the regulating valve 6 can adjust the pressure inside the shell side of the vertical shell and tube heat exchanger 1, thereby adjusting the saturation temperature of propane, so that when the propane is exchanging heat, the circulating water will not freeze after releasing heat; a pressure gauge 8 is arranged on the tube side outlet pipe 5; the pressure gauge 8 is close to the vertical shell and tube heat exchanger 1, and the pressure inside the vertical shell and tube heat exchanger 1 can be measured by the pressure gauge 8.

[0017] A pressure reducing valve 7 for adjusting the pressure of the medium discharged from the tube-side outlet pipe 5 is provided on the tube-side outlet pipe 5, and a pressure gauge 8 is located on the side of the pressure reducing valve 7 close to the vertical shell and tube heat exchanger 1; the pressure reducing valve can reduce the pressure of gaseous propane, reduce the saturation temperature of propane, and prevent the gaseous propane from liquefying when the weather is cold.

[0018] The pipe outlet 5 is connected to a buffer tank 9; the buffer tank 9 ensures the stability of the pressure and flow of the propane gas transported to the downstream device.

[0019] A thermometer 10 is provided on the pipe outlet 5, and the thermometer 10 is located on the side of the pressure reducing valve 7 close to the buffer tank 9; a pressure gauge 11 is provided on the buffer tank 9; the pressure gauge 11 and the thermometer 10 are provided to determine whether the pressure is adjusted to the specified pressure, and to determine whether the gaseous propane is liquefied by combining the values ​​of the two gauges.

[0020] The vertical shell and tube heat exchanger 1 is provided with a level gauge 12 for detecting the liquid level in its shell side; a rise in the liquid level indicates that the vaporization amount is less than the feed amount, and a too high liquid level will cause liquid propane to enter the shell side outlet pipe 3. The feed amount can be adjusted or the vaporization amount can be increased by observing the liquid level; a safety valve 13 is provided on the tube side outlet pipe 5, and the safety valve 13 is used to prevent the equipment from being damaged due to excessive propane pressure.

[0021] This embodiment also provides a propane gasification method, using the propane gasification device in the above embodiment, comprising the following steps:

[0022] S1. Pass circulating water into the tube side of the vertical shell and tube heat exchanger 1 from the tube side inlet pipe 4, and pass liquid propane into the shell side of the vertical shell and tube heat exchanger 1 from the shell side inlet pipe 2; adjust the regulating valve 6 to make the pressure in the shell side of the vertical shell and tube heat exchanger 1 reach 0.37MPa, ensuring that the saturation temperature of the liquid propane is greater than 0°C; as soon as the liquid propane enters the bottom of the tube side of the vertical shell and tube heat exchanger 1, it instantly evaporates into gaseous propane under the combined action of the heat of the heat exchange tube and the heat transferred upward from the lower tube box.

[0023] S2. Liquid propane absorbs heat and evaporates into gaseous propane after exchanging heat with circulating water in the vertical shell and tube heat exchanger 1, and then is discharged from the shell side outlet pipe 3; by adjusting the pressure reducing valve 7, the pressure of the discharged gaseous propane is reduced to 0.15MPa.

[0024] By passing circulating water into the shell side and liquid propane into the tube side, the following advantages are achieved: 1. Circulating water flows through the tube side more smoothly than through the shell side, without any obstruction, with a faster flow rate, and is less likely to freeze after heat exchange; 2. There is circulating water in the heat exchanger tube box, and the temperature of the circulating water will not cause frost or ice on the outside of the tube box; 3. The heat of the circulating water in the bottom heat exchanger tube box can be transferred to the heat exchanger through the tube sheet, and together with the heat exchange tubes, the liquid propane is heated, resulting in a higher heat utilization rate; 4. Circulating water flows through the tube side, and scale in the tube side can be cleaned by passing chemical liquid.

[0025] By controlling the pressure in the shell side of the vertical shell and tube heat exchanger to 0.37MPa, it can be ensured that the saturation temperature of liquid propane is greater than 0°C, so that the circulating water will not freeze after the liquid propane exchanges heat with the circulating water; by reducing the pressure of the gaseous propane in the outlet pipe of the tube side to 0.15MPa, it can be ensured that as long as the temperature of the gaseous propane is above -19°C, it will not liquefy, reducing the possibility of gaseous propane liquefying in cold weather.

[0026] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A propane gasification device, comprising a vertical shell and tube heat exchanger (1), wherein the vertical shell and tube heat exchanger (1) is connected with a shell side inlet pipe (2), a shell side outlet pipe (3), a tube side inlet pipe (4) and a tube side outlet pipe (5), characterized in that: The shell-side inlet pipe (2) is provided with a regulating valve (6) for regulating the pressure inside the shell side of the vertical shell and tube heat exchanger (1), and the tube-side outlet pipe (5) is provided with a pressure gauge 1 (8).

2. The propane gasification device according to claim 1, characterized in that: The tube-side outlet pipe (5) is provided with a pressure reducing valve (7) for adjusting the pressure of the medium discharged from the tube-side outlet pipe (5), and the pressure gauge 1 (8) is located on a side of the pressure reducing valve (7) close to the vertical shell and tube heat exchanger (1).

3. The propane gasification device according to claim 2, characterized in that: The pipe outlet pipe (5) is connected to a buffer tank (9).

4. The propane gasification device according to claim 3, characterized in that: A temperature gauge (10) is provided on the pipe outlet pipe (5), and the temperature gauge (10) is located on a side of the pressure reducing valve (7) close to the buffer tank (9); a second pressure gauge (11) is provided on the buffer tank (9).

5. The propane gasification device according to claim 1, characterized in that: The vertical shell and tube heat exchanger (1) is provided with a liquid level meter (12) for detecting the liquid level in the shell side thereof, and the tube side outlet pipe (5) is provided with a safety valve (13).

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