Helium-rich tail gas recovery and purification on-line circulating device for optical fiber production

Abstract

The utility model discloses a helium-rich tail gas recovery and purification on-line circulating device for optical fiber production, which comprises a shell, and a plurality of supporting legs are mounted at the lower end of the shell; the circulating mechanism comprises a first temperature conduction cavity and a second temperature conduction cavity which are formed in the shell, temperature conduction pipes are arranged in the first temperature conduction cavity and the second temperature conduction cavity, the air outlet end of the temperature conduction pipe located on the left side communicates with the air inlet end of the temperature conduction pipe located on the right side through a U-shaped pipe, and an air storage cavity is formed in the shell; a piston plate capable of sliding up and down is arranged in the air storage cavity, the inner top of the air storage cavity communicates with the outside through an air leakage hole, and the air outlet end of the heat conduction pipe located on the right side extends into the air storage cavity. The device adopts circulating purification, the circulating purification mode is utilized, the purification effect is better, in addition, a heating rod is further arranged, temperature returning can be conducted on follow-up gas, and the situation that the temperature of follow-up exhausted gas is too low is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas purification, in particular to an online circulation device for recovering and purifying helium-rich tail gas used in optical fiber production. Background Art

[0002] Helium has been widely used in aerospace, military, scientific research and other fields. With the growing development and growth of my country's industry, the consumption of helium in certain industrial fields is also considerable, such as air conditioning, optical fiber and cable, semiconductor and other industries. Industrial helium is generally consumed directly and discharged into the atmosphere without post-processing such as recovery and purification of the helium in the tail gas. The reasons are generally that helium does not account for a high proportion of the cost of raw materials in the product, there are no conditions for recovery or recovery is difficult, and the purification technology is immature. The purity of helium in industrial helium tail gas can generally reach 30% to 70%. If these helium resources are wasted;

[0003] Existing gas purification devices generally adopt the method of filtering first and then using low temperature to liquefy and remove some impurity gases. However, the actual purification effect of a single low-temperature purification method is poor. Therefore, it is necessary to consider the design of a purification online circulation device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art, and to propose an online circulation device for recovering and purifying helium-rich tail gas for optical fiber production. The device also adopts circulation purification, and the purification effect is better by using the circulation purification method. In addition, a heating rod is also provided to return the temperature of the subsequent gas to avoid the situation where the temperature of the subsequent exhaust gas is too low.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The invention discloses an online circulation device for recovering and purifying helium-rich tail gas for optical fiber production, comprising a shell, a plurality of supporting legs are installed at the lower end of the shell; a circulation mechanism, the circulation mechanism comprising a first temperature conducting cavity and a second temperature conducting cavity opened in the shell, the first temperature conducting cavity and the second temperature conducting cavity are both provided with temperature conducting pipes, the gas outlet end of the temperature conducting pipe located on the left side is connected with the gas inlet end of the temperature conducting pipe located on the right side through a U-shaped pipe, an air storage cavity is provided in the shell, a piston plate which can slide up and down is provided in the air storage cavity, and the inner top of the air storage cavity is connected with the outside through an air leakage hole. The air outlet end of the temperature conducting tube on the right side extends into the air storage cavity, the air inlet end of the temperature conducting tube on the left side extends to the outside and is connected with an air inlet pipe, a circulating air pump is installed on the upper end of the shell, the air inlet end of the circulating air pump extends to the inner bottom of the air storage cavity, the air outlet end of the circulating air pump is connected with the first branch pipe and the second branch pipe, the other end of the first branch pipe is connected with the air inlet end of the left temperature conducting tube, and a purity detector is embedded in the inner bottom of the air storage cavity; an impurity liquid collecting mechanism, and the impurity liquid collecting mechanism is located below the shell.

[0007] Preferably, both the first temperature conducting cavity and the second temperature conducting cavity are filled with temperature conducting oil.

[0008] Preferably, a semiconductor refrigeration component is installed on the left side of the shell, and the refrigeration end of the semiconductor refrigeration component extends to the inside of the first temperature conduction cavity.

[0009] Preferably, a heating rod is installed in the second temperature conducting cavity.

[0010] Preferably, solenoid valves are installed in the first branch pipe, the second branch pipe and the air intake pipe.

[0011] Preferably, the impurity liquid collecting mechanism comprises a liquid storage tank arranged on the ground, and the liquid storage tank is connected to the U-shaped tube through a drain pipe.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] A circulating air pump is provided. Through the use of the circulating air pump, internal gas circulation purification can be realized in actual use. Compared with the existing single purification, the purification effect of this scheme is better. Through the setting of temperature-conducting oil, the uniformity of cooling and subsequent heating can be improved to ensure the purification effect. In addition, a heating rod is also provided to prevent the discharged purified helium temperature from being too low, which is convenient for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of an online circulation device for recovering and purifying helium-rich tail gas for optical fiber production proposed by the utility model;

[0015] Figure 2 for Figure 1 Bottom view of

[0016] Figure 3 for Figure 1 Partial cross-sectional view.

[0017] In the figure: 1 shell, 2 support legs, 3 circulating air pump, 4 first branch pipe, 5 second branch pipe, 6 air leakage hole, 7 air inlet pipe, 8 first temperature conduction cavity, 9 second temperature conduction cavity, 10 semiconductor refrigeration component, 11 U-shaped tube, 12 heating rod, 13 air storage cavity, 14 piston plate, 15 liquid storage tank, 16 purity detector, 17 temperature conduction pipe, 18 drainage pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-Figure 3 , an online circulation device for recovering and purifying helium-rich tail gas for optical fiber production, comprising a shell 1, a plurality of supporting legs 2 are installed at the lower end of the shell 1;

[0020] Among them, it also includes a circulation mechanism, which includes a first temperature conducting chamber 8 and a second temperature conducting chamber 9 opened in the shell 1, and a temperature conducting tube 17 is arranged in the first temperature conducting chamber 8 and the second temperature conducting chamber 9, and the air outlet end of the temperature conducting tube 17 located on the left side is connected with the air inlet end of the temperature conducting tube 17 located on the right side through a U-shaped tube 11, and an air storage chamber 13 is arranged in the shell 1, and a piston plate 14 that can slide up and down is arranged in the air storage chamber 13, and the inner top of the air storage chamber 13 is connected with the outside through the air leakage hole 6, and the air outlet end of the temperature conducting tube 17 located on the right side extends into the air storage chamber 13, and the air inlet end of the temperature conducting tube 17 located on the left side is connected with the air inlet end of the temperature conducting tube 17 located on the left side. The air inlet end of the temperature conducting pipe 17 on the side extends to the outside and is connected with the air inlet pipe 7. The upper end of the shell 1 is equipped with a circulating air pump 3. The air inlet end of the circulating air pump 3 extends to the inner bottom of the air storage chamber 13. The air outlet end of the circulating air pump 3 is connected with the first branch pipe 4 and the second branch pipe 5. The other end of the first branch pipe 4 is connected with the air inlet end of the left temperature conducting pipe 17. The inner bottom of the air storage chamber 13 is embedded with a purity detector 16. The purity detector 16 is a prior art and can detect the purity of the gas. For details, see the relevant part of the utility model patent with publication number CN203700194U;

[0021] A semiconductor refrigeration component 10 is installed on the left side of the housing 1, and the refrigeration end of the semiconductor refrigeration component 10 extends into the first temperature conducting cavity 8, and a heating rod 12 is installed in the second temperature conducting cavity 9;

[0022] Wherein, solenoid valves are installed in the first branch pipe 4, the second branch pipe 5 and the air inlet pipe 7, and the other end of the second branch pipe 5 is connected to an external gas collection structure;

[0023] It also includes an impurity liquid collecting mechanism, which is located below the shell 1 and includes a liquid storage tank 15 arranged on the ground. The liquid storage tank 15 is connected to the U-shaped tube 11 through a drain pipe 18.

[0024] In the utility model, when in use, the air inlet pipe 7 is connected to the external high-pressure air pump, the high-pressure air pump presses the filtered exhaust gas into the shell 1, the semiconductor refrigeration component 10 is started, the gas is cooled at the first temperature conducting chamber 8, and the impurity gas can be liquefied by cooling, and finally falls into the liquid storage tank 15 at the discharge pipe 18, the purified gas enters the gas storage chamber 13, and pushes the piston plate 14 to move upward, when a certain amount of gas is injected, the high-pressure air pump is turned off, the solenoid valve on the air inlet pipe 7 is closed, and then the circulation air pump 3 and the solenoid valve on the first branch pipe 4 are started, so that the internal gas circulates, the internal gas circulates, and is continuously cooled and purified at the temperature conducting pipe 17, the purification effect can be improved by circulating cooling and purification, the purification state can be visually observed by the purity detector 16, when the purification requirement is met, the semiconductor refrigeration component 10 is turned off, and the heating rod 12 is turned on to make the circulating gas return to temperature, finally the solenoid valve on the first branch pipe 4 is closed, the solenoid valve on the second branch pipe 5 is opened, and the gas in the gas storage chamber 13 is discharged to the outside.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An online circulation device for recovering and purifying helium-rich tail gas for optical fiber production, characterized in that: include: A shell (1), wherein a plurality of supporting legs (2) are mounted on the lower end of the shell (1); A circulation mechanism, the circulation mechanism comprising a first temperature conducting chamber (8) and a second temperature conducting chamber (9) opened in a shell (1), the first temperature conducting chamber (8) and the second temperature conducting chamber (9) are both provided with temperature conducting pipes (17), the air outlet end of the temperature conducting pipe (17) located on the left side is connected to the air inlet end of the temperature conducting pipe (17) located on the right side through a U-shaped pipe (11), an air storage chamber (13) is provided in the shell (1), a piston plate (14) that can slide up and down is provided in the air storage chamber (13), the inner top of the air storage chamber (13) is connected to the outside through an air leakage hole (6), and the air outlet end of the temperature conducting pipe (17) located on the right side is connected to the air inlet end of the temperature conducting pipe (17) located on the left side through a U-shaped pipe (11), an air storage chamber (13) is provided in the air storage chamber (13), a piston plate (14) that can slide up and down is provided in the air storage chamber (13), the inner top of the air storage chamber (13) is connected to the outside through an air leakage hole (6), and the air outlet end of the temperature conducting pipe (17) located on the right side is connected to the air outlet end of the temperature conducting pipe (17) located on the left side through a U-shaped pipe (1 ... storage chamber (13) is connected to the outside through an air leakage hole (6). The air outlet end of the temperature conducting pipe (17) extends into the air storage chamber (13), the air inlet end of the temperature conducting pipe (17) on the left side extends to the outside and is connected to the air inlet pipe (7), a circulating air pump (3) is installed at the upper end of the shell (1), the air inlet end of the circulating air pump (3) extends to the inner bottom of the air storage chamber (13), the air outlet end of the circulating air pump (3) is connected to the first branch pipe (4) and the second branch pipe (5), the other end of the first branch pipe (4) is connected to the air inlet end of the temperature conducting pipe (17) on the left side, and a purity detector (16) is embedded in the inner bottom of the air storage chamber (13); An impurity liquid collecting mechanism, wherein the impurity liquid collecting mechanism is located below the shell (1).

2. The online circulation device for recovering and purifying helium-rich tail gas for optical fiber production according to claim 1, characterized in that: The first temperature conducting cavity (8) and the second temperature conducting cavity (9) are both filled with temperature conducting oil.

3. The online circulation device for recovering and purifying helium-rich tail gas for optical fiber production according to claim 2 is characterized in that: A semiconductor refrigeration component (10) is installed on the left side of the shell (1), and the refrigeration end of the semiconductor refrigeration component (10) extends to the inside of the first temperature conduction cavity (8).

4. The online circulation device for recovering and purifying helium-rich tail gas for optical fiber production according to claim 2, characterized in that: A heating rod (12) is installed in the second temperature conducting cavity (9).

5. The online circulation device for recovering and purifying helium-rich tail gas for optical fiber production according to claim 1, characterized in that: Solenoid valves are installed in the first branch pipe (4), the second branch pipe (5) and the air intake pipe (7).

6. The online circulation device for recovering and purifying helium-rich tail gas for optical fiber production according to claim 1, characterized in that: The impurity liquid collection mechanism comprises a liquid storage tank (15) arranged on the ground, and the liquid storage tank (15) is connected to the U-shaped tube (11) through a liquid discharge pipe (18).

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