Propane gasification system

Abstract

The utility model relates to the technical field of propane gasification, in particular to a propane gasification system which comprises a shell-and-tube heat exchanger, and the shell-and-tube heat exchanger is connected with a tube pass fluid inlet tube, a tube pass fluid outlet tube, a shell pass fluid inlet tube and a shell pass fluid outlet tube. A coil pipe is wound outside the shell-and-tube heat exchanger, one end of the coil pipe is connected with a steam pipe, and the other end of the coil pipe is connected with a tube pass fluid inlet pipe. A coil pipe shut-off valve and a coil pipe adjusting valve are arranged on the coil pipe; by arranging the coil pipe, steam is introduced into the coil pipe, on the basis that circulating water in a tube pass heats liquid-state alanyl ammonia, the steam can be used for heating the liquid-state alanyl ammonia, the steam can be mixed with the circulating water after being condensed, and the temperature of the circulating water is increased after mixing; finally, the evaporation effect of the liquid propane is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of propane gasification technology, specifically a propane gasification system. Background Technology

[0002] In existing technologies, shell-and-tube heat exchangers are used to vaporize liquid propane. Circulating water and liquid propane are introduced into the tube side and shell side of the heat exchanger, respectively, for heat exchange. The heat from the circulating water is transferred to the liquid propane, which then absorbs heat and evaporates. To prevent the circulating water from freezing after heat exchange, the pressure of the liquid propane needs to be adjusted so that the saturation temperature of the liquid propane inside the shell-and-tube heat exchanger reaches above 0°C. However, the temperature of the circulating water in existing systems is usually not high enough, resulting in poor evaporation of the liquid propane. Utility Model Content

[0003] The main objective of this invention is to provide a propane gasification system to solve the problem in the prior art where the temperature of the circulating water is not high enough when using a shell-and-tube heat exchanger to gasify liquid propane, resulting in poor evaporation of liquid propane.

[0004] To achieve the above objectives, this utility model provides a propane gasification system, including a shell-and-tube heat exchanger, which is connected to a tube-side fluid inlet pipe, a tube-side fluid outlet pipe, a shell-side fluid inlet pipe, and a shell-side fluid outlet pipe; the shell-and-tube heat exchanger is externally wound with a coil, one end of which is connected to a steam pipe, and the other end of which is connected to the tube-side fluid inlet pipe.

[0005] Furthermore, the coil is equipped with a coil shut-off valve and a coil regulating valve.

[0006] Furthermore, a steam-water mixing heater is connected to the inlet pipe of the tubular fluid, and the steam-water mixing heater is connected to a steam pipe; a heater shut-off valve and a heater regulating valve are installed on the steam pipe near the steam-water mixing heater.

[0007] Furthermore, the shell-side fluid inlet pipe is connected to a liquid ammonia storage tank.

[0008] Furthermore, a liquid propane regulating valve is connected to the shell-side fluid inlet pipe.

[0009] Furthermore, the shell-side fluid outlet pipe is connected to an ammonia buffer tank.

[0010] Furthermore, a gaseous propane regulating valve is connected to the shell-side fluid outlet pipe.

[0011] The beneficial effects of this utility model are:

[0012] By installing a coil and introducing steam into it, the liquid propane can be heated by steam in addition to the circulating water heating the liquid propane in the tube side. Furthermore, the condensed steam can mix with the circulating water, thereby increasing the temperature of the circulating water and ultimately enhancing the evaporation effect of the liquid propane.

[0013] By setting a regulating valve for the coil, the flow rate of steam inside the coil can be adjusted.

[0014] By setting up a steam-water mixing heater, it can serve as a backup for the coil. When the coil is damaged or under maintenance, it can be activated to increase the circulating water temperature and enhance the evaporation effect of liquid propane. However, because the steam-water mixing heater vibrates significantly during use, it can only be used as a backup in emergencies and cannot completely replace the coil. Attached Figure Description

[0015] The accompanying drawings, which form part of this 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 of the present invention.

[0016] Figure 1 This is a schematic diagram of the propane gasification system in the embodiment;

[0017] In the diagram: 1. Shell-and-tube heat exchanger; 2. Tube-side fluid inlet pipe; 3. Tube-side fluid outlet pipe; 4. Shell-side fluid inlet pipe; 5. Shell-side fluid outlet pipe; 6. Coil; 7. Steam pipe; 8. Steam-water mixing heater; 9. Liquid propane storage tank; 10. Liquid propane regulating valve; 11. Propane buffer tank; 12. Gaseous propane regulating valve. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, according to an embodiment of the present invention, a propane gasification system is provided, including a shell-and-tube heat exchanger 1. The shell-and-tube heat exchanger 1 is connected to a tube-side fluid inlet pipe 2, a tube-side fluid outlet pipe 3, a shell-side fluid inlet pipe 4, and a shell-side fluid outlet pipe 5. The shell-and-tube heat exchanger 1 is spirally wound with a coil 6 on its exterior. One end of the coil 6 is connected to a steam pipe 7, and the other end is connected to the tube-side fluid inlet pipe 2.

[0020] The coil 6 is equipped with a coil shut-off valve and a coil regulating valve; the inner diameter of the coil 6 is 15mm and the wall thickness is 2mm. The coil 6 is fixed to the outside of the shell and tube heat exchanger 1 with pipe clamps, and 3 pipe clamps are installed for each coil.

[0021] A steam-water mixing heater 8 is connected to the fluid inlet pipe 2, and the steam-water mixing heater 8 is connected to the steam pipe 7; a heater shut-off valve and a heater regulating valve are installed on the steam pipe 7 near the steam-water mixing heater 8.

[0022] The shell-side fluid inlet pipe 4 is connected to a liquid propane storage tank 9; a liquid propane regulating valve 10 is connected to the shell-side fluid inlet pipe 4.

[0023] The shell-side fluid outlet pipe 5 is connected to an ammonia buffer tank 11; a gaseous ammonia regulating valve 12 is connected to the shell-side fluid outlet pipe (5).

[0024] This embodiment also provides a propane gasification method using a propane gasification system, including the following steps:

[0025] S1. Liquid propane is introduced into the shell side of the shell-and-tube heat exchanger 1 through the shell-side fluid inlet pipe 4, and the pressure of liquid propane is controlled to be greater than 0.37 MPa by adjusting the liquid propane regulating valve 10, so that the saturation temperature of liquid propane in the shell side is greater than 0℃.

[0026] S2. Circulating water is introduced into the tube side of the shell-and-tube heat exchanger 1 through the tube-side fluid inlet pipe 2. The temperature of the circulating water is 20-30℃. The circulating water and liquid propane exchange heat.

[0027] Steam is introduced into coil 6 through steam pipe S3. The steam temperature is 190-210℃, and the steam exchanges heat with liquid propane. The steam after heat exchange becomes condensate with a temperature of 90-100℃. The condensate flows into the tube-side fluid inlet pipe 2 and mixes with the circulating water. The temperature of the mixed water is 35-40℃. The mixed water then enters the tube side of the shell-and-tube heat exchanger 1.

[0028] S4. After absorbing heat, the liquid propane in the shell side evaporates into gaseous propane. The gaseous propane is discharged outward through the shell-side fluid outlet pipe 5 into the propane buffer tank 11. The pressure of the gaseous propane in the propane buffer tank 11 is maintained at less than 150 kPa by the gaseous propane regulating valve 12.

[0029] The beneficial effects of this utility model are:

[0030] By installing a coil and introducing steam into it, the liquid propane can be heated by steam in addition to the circulating water heating the liquid propane in the tube side. Furthermore, the condensed steam can mix with the circulating water, which raises the temperature of the circulating water and ultimately enhances the evaporation effect of the liquid propane.

[0031] By setting a coil regulating valve, the steam flow rate in the coil can be adjusted; in winter, when the circulating water temperature is low, the coil regulating valve is fully open; in summer, when the circulating water temperature is high, and the circulating water temperature is above 25℃, the coil steam is reduced to save energy and reduce consumption.

[0032] By setting up a steam-water mixing heater, it can serve as a backup for the coil. When the coil is damaged or under maintenance, it can be activated to increase the circulating water temperature and enhance the evaporation effect of liquid propane. However, because the steam-water mixing heater vibrates significantly during use, it can only be used in emergency situations and cannot completely replace the coil.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A propane gasification system, comprising a shell-and-tube heat exchanger (1), wherein the shell-and-tube heat exchanger (1) is connected to a tube-side fluid inlet pipe (2), a tube-side fluid outlet pipe (3), a shell-side fluid inlet pipe (4), and a shell-side fluid outlet pipe (5); characterized in that; The shell-and-tube heat exchanger (1) is wrapped with a coil (6), one end of which is connected to a steam pipe (7) and the other end is connected to a tube-side fluid inlet pipe (2).

2. The propane gasification system as described in claim 1, characterized in that, The coil (6) is equipped with a coil shut-off valve and a coil regulating valve.

3. The propane gasification system as described in claim 1, characterized in that, A steam-water mixing heater (8) is connected to the fluid inlet pipe (2), and the steam-water mixing heater (8) is connected to a steam pipe (7); a heater shut-off valve and a heater regulating valve are provided on the steam pipe (7) near the steam-water mixing heater (8).

4. The propane gasification system as described in claim 1, characterized in that, The shell-side fluid inlet pipe (4) is connected to a liquid propane storage tank (9).

5. The propane gasification system as described in claim 4, characterized in that, A liquid propane regulating valve (10) is connected to the shell-side fluid inlet pipe (4).

6. The propane gasification system as described in claim 1, characterized in that, The shell-side fluid outlet pipe (5) is connected to an ammonia buffer tank (11).

7. The propane gasification system as described in claim 6, characterized in that, A gaseous propane regulating valve (12) is connected to the shell-side fluid outlet pipe (5).

Images