Self-regeneration helium purification system

Abstract

The invention relates to the technical field of helium purification, and discloses a self-regeneration helium purification system which comprises a purification operation loop, a purification valve group, a regeneration operation loop and a regeneration valve group, according to the self-regeneration helium purification system, a purification operation loop and a regeneration operation loop are integrally arranged, a purification valve set and a regeneration valve set are arranged on the purification operation loop and the regeneration operation loop correspondingly so as to control the helium flowing direction on the purification operation loop and the regeneration operation loop correspondingly, and a first adjusting valve is arranged on a backflow pipeline; therefore, the regenerated helium flow is controlled. By arranging the purification valve group, the regeneration valve group and the first adjusting valve, integration of helium purification and self-regeneration is achieved, independent arrangement of a helium purification and regeneration system is reduced, system configuration is simplified, the number of devices is reduced, and the purposes of reducing occupied space of the devices and reducing maintenance cost and operation cost are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of helium purification, and in particular to a self-regenerating helium purification system. Background Art

[0002] The high temperature gas-cooled reactor is equipped with a helium purification system to remove impurities such as H2, O2, CH4, CO, CO2, N2, H2O and radioactive inert gases in the primary helium loop, purify the primary helium loop, and meet the reactor's requirements for the impurity content of the primary helium loop. The purification equipment in the helium purification system mainly includes copper oxide beds, molecular sieve beds, low-temperature adsorbers, etc. After these purification equipment have been running for a certain period of time, they will reach a saturated state, and the purification efficiency will decrease, resulting in an increase in the impurity content of the primary helium loop. At this time, the purification equipment needs to be regenerated to improve the purification efficiency of the purification equipment.

[0003] At present, the high-temperature gas-cooled reactor is equipped with a helium purification and regeneration system to regenerate the helium purification equipment. The main equipment of the helium purification and regeneration system includes diaphragm compressors, electric heaters, water-helium coolers, gas-water separators and molecular sieve beds. The diaphragm compressor is used to provide the flow required for regeneration, the electric heater is used to heat the helium for regeneration, the water-helium cooler is used to cool the regenerated helium, the gas-water separator is used to separate the water in the regenerated helium, and the auxiliary molecular sieve bed is used to absorb the water and carbon dioxide analyzed by the regeneration of the helium purification molecular sieve bed. This method requires a separate helium purification and regeneration system, which will occupy plant space and increase engineering construction costs. The maintenance of the equipment in the system will also increase the operating costs and burden of the power plant. Summary of the invention

[0004] In view of this, the present invention provides a self-regenerating helium purification system to solve the problem that the helium purification system in the prior art needs to be equipped with a regeneration system, which leads to large floor space, high construction cost, high operation cost and high maintenance cost.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] The invention provides a self-regenerative helium purification system, comprising: a purification operation loop, a purification valve group, a regeneration operation loop and a regeneration valve group; the purification operation loop comprises an electric heater, a copper oxide bed, a water-helium cooler, a gas-water separator, a first molecular sieve bed, a low-temperature adsorber and a diaphragm compressor which are sequentially connected and arranged along the helium flow direction through pipelines; the purification valve group is arranged on the purification operation loop; the regeneration operation loop comprises a reflux pipeline, one end of which is connected to the inlet end of the electric heater, and the other end of which is connected to the outlet end of the diaphragm compressor, and a first regulating valve is arranged on the reflux pipeline; the regeneration valve group is arranged on the regeneration operation loop; when the system is in a purification operation state, the purification valve group is opened, and the regeneration valve group and the first regulating valve are closed; when the system is in the regeneration operation state, the purification valve group is closed, and the regeneration valve group and the first regulating valve are opened, and the first regulating valve is suitable for regulating and controlling the regeneration helium flow rate.

[0007] It has the following advantages:

[0008] The self-regenerative helium purification system integrates the purification operation loop and the regeneration operation loop, and respectively arranges the purification valve group and the regeneration valve group on the purification operation loop and the regeneration operation loop to control the helium flow direction on the purification operation loop and the regeneration operation loop, and the first regulating valve is arranged on the reflux pipeline to control the regeneration helium flow. The present invention realizes the integration of helium purification and self-regeneration by arranging the purification valve group, the regeneration valve group and the first regulating valve, reduces the need for a separate helium purification and regeneration system, simplifies the system configuration, and reduces the number of devices, so as to achieve the purpose of reducing the occupation of equipment space, and reducing maintenance costs and operating costs.

[0009] According to some embodiments of the present invention, the purification operation loop further includes a first purification pipe, a second purification pipe, a third purification pipe, a fourth purification pipe, a fifth purification pipe and a sixth purification pipe;

[0010] The two ends of the first purification pipe are respectively connected to the electric heater and the copper oxide bed; the two ends of the second purification pipe are respectively connected to the copper oxide bed and the water-helium cooler; the two ends of the third purification pipe are respectively connected to the water-helium cooler and the gas-water separator; the two ends of the fourth purification pipe are respectively connected to the gas-water separator and the first molecular sieve bed; the two ends of the fifth purification pipe are respectively connected to the first molecular sieve bed and the low-temperature adsorber; the two ends of the sixth purification pipe are respectively connected to the low-temperature adsorber and the diaphragm compressor;

[0011] The purification valve group includes a first valve group, a second valve group, a third valve group, a fourth valve group and a fifth valve group. The first valve group is arranged on the first purification pipe, and the second valve group is arranged on the second purification pipe; the third valve group is arranged on the fourth purification pipe, the fourth valve group is arranged on the fifth purification pipe, and the fifth valve group is arranged on the sixth purification pipe.

[0012] According to some embodiments of the present invention, the first valve group includes a first valve body and a second valve body arranged in series; the second valve group includes a third valve body and a fourth valve body arranged in series; the third valve group includes a fifth valve body and a sixth valve body arranged in series, the fourth valve group includes a seventh valve body and an eighth valve body arranged in series, and the five-valve group includes a ninth valve body and a tenth valve body arranged in series;

[0013] The copper oxide bed is provided with a first bypass pipe in parallel, one end of the first bypass pipe is connected to the first purification pipe, the other end of the first bypass pipe is connected to the second purification pipe, and the first bypass pipe is provided with a first bypass valve;

[0014] A second bypass pipe is provided in parallel with the first molecular sieve bed, one end of the second bypass pipe is connected to the fourth purification pipe, the other end of the second bypass pipe is connected to the fifth purification pipe, and a second bypass valve is provided on the second bypass pipe;

[0015] The low-temperature adsorber is provided with a third bypass pipe in parallel, one end of the third bypass pipe is communicated with the fifth purification pipe, the other end of the third bypass pipe is communicated with the sixth purification pipe, and the third bypass pipe is provided with a third bypass valve.

[0016] According to some embodiments of the present invention, one end of the first bypass pipe communicating with the first purification pipe is located between the first valve body and the second valve body; the other end of the first bypass pipe communicating with the second purification pipe is located between the third valve body and the fourth valve body;

[0017] One end of the second bypass pipe communicating with the fourth purification pipe is located between the fifth valve body and the sixth valve body, and the other end of the second bypass pipe communicating with the fifth purification pipe is located between the seventh valve body and the eighth valve body;

[0018] One end of the third bypass pipe communicating with the fifth purification pipe is located between the seventh valve body and the eighth valve body, and the other end of the third bypass pipe communicating with the sixth purification pipe is located between the ninth valve body and the tenth valve body.

[0019] According to some embodiments of the present invention, the regeneration operation loop includes a first regeneration pipe, a second regeneration pipe and the third regeneration pipe, the two ends of the first regeneration pipe are respectively connected to the outlet end of the electric heater and the inlet end of the copper oxide bed; the two ends of the second regeneration pipe are respectively connected to the outlet end of the copper oxide bed and the inlet end of the water-helium cooler, one end of the third regeneration pipe is connected to the outlet end of the gas-water separator, and the other end of the third regeneration pipe is connected to the inlet end of the diaphragm compressor;

[0020] The regeneration valve group includes a sixth valve group and a seventh valve group, the sixth valve group is arranged on the first regeneration pipe, and the seventh valve group is arranged on the second regeneration pipe; the third regeneration pipe is provided with a second regulating valve;

[0021] The purification valve group is closed, and the sixth valve group, the seventh valve group, the first regulating valve and the second regulating valve are all opened; the helium flows through the electric heater, the first regeneration pipe, the copper oxide bed, the second regeneration pipe, the water-helium cooler, the third purification pipe, the gas-water separator, the third regeneration pipe and the diaphragm compressor in sequence, and flows back to the electric heater through the reflux pipe to form a first regeneration loop, which is used to regenerate the copper oxide bed.

[0022] According to some embodiments of the present invention, one end of the first regeneration pipe is connected to the front end of the first purification pipe and is located at the front end of the first valve group, the other end of the first regeneration pipe is connected to the rear end of the first purification pipe and is located at the rear end of the first valve group, the sixth valve group is arranged in parallel with the first valve group, and the sixth valve group includes an eleventh valve body and a twelfth valve body arranged in series;

[0023] One end of the second regeneration pipe is connected to the front end of the second purification pipe and is located at the front end of the second valve group, the other end of the second regeneration pipe is connected to the rear end of the second purification pipe and is located at the rear end of the second valve group, the seventh valve group is arranged in parallel with the second valve group, and the seventh valve group includes a thirteenth valve body and a fourteenth valve body arranged in series;

[0024] One end of the third regeneration pipe is connected to the front end of the fourth purification pipe and is located at the front end of the third valve group, and the other end of the third regeneration pipe is connected to the rear end of the sixth purification pipe and is located at the rear end of the fifth valve group.

[0025] According to some embodiments of the present invention, a second molecular sieve bed is provided on the third regeneration pipe, the second molecular sieve bed is arranged in parallel with the second regulating valve, and a first control valve and a second control valve are respectively provided before and after the second molecular sieve bed;

[0026] The regeneration operation loop further includes a fourth regeneration pipe and a fifth regeneration pipe, one end of the fourth regeneration pipe is connected to the outlet end of the electric heater, the other end of the fourth regeneration pipe is connected to the inlet end of the first molecular sieve bed, one end of the fifth regeneration pipe is connected to the outlet end of the first molecular sieve bed, and the other end of the fifth regeneration pipe is connected to the inlet end of the water-helium cooler;

[0027] The regeneration valve group further includes a seventh valve group and an eighth valve group, the seventh valve group is arranged on the fourth regeneration pipe, and the eighth valve group is arranged on the fifth regeneration pipe;

[0028] The purification valve group and the second regulating valve are closed, and the first regulating valve, the first control valve, the second control valve, the seventh valve group and the eighth valve group are opened; the helium flows through the electric heater, the fourth regeneration pipe, the first molecular sieve bed, the fifth regeneration pipe, the water-helium cooler, the third purification pipe, the gas-water separator, the third regeneration pipe, the second molecular sieve bed and the diaphragm compressor in sequence, and flows back to the electric heater through the reflux pipe to form a second regeneration loop, and the second regeneration loop is suitable for regenerating the first molecular sieve bed.

[0029] According to some embodiments of the present invention, one end of the fourth regeneration pipe is connected to the first regeneration pipe and is located between the eleventh valve body and the twelfth valve body, and the other end of the fourth regeneration pipe is connected to the fourth purification pipe and is located at the rear end of the third valve group; the seventh valve group includes a fifteenth valve body;

[0030] One end of the fifth regeneration pipe is connected to the second regeneration pipe and is located between the thirteenth valve body and the fourteenth valve body. The other end of the fifth regeneration pipe is connected to the front end of the fifth purification pipe and is located at the front end of the fourth valve group. The eighth valve group includes a sixteenth valve body.

[0031] According to some embodiments of the present invention, the regeneration operation loop further includes a sixth regeneration pipe and a seventh regeneration pipe, one end of the sixth regeneration pipe is connected to the outlet end of the electric heater, and the other end of the sixth regeneration pipe is connected to the inlet end of the low-temperature adsorber; one end of the seventh regeneration pipe is connected to the outlet end of the low-temperature adsorber, and the other end of the seventh regeneration pipe is connected to the inlet end of the water-helium cooler;

[0032] The regeneration valve group also controls a ninth valve group and a tenth valve group, wherein the ninth valve group is arranged on the sixth regeneration pipe, and the tenth valve group is arranged on the seventh regeneration pipe;

[0033] The purification valve group, the first control valve and the second control valve, the ninth valve group, the tenth valve group, the first regulating valve and the second regulating valve are opened, and the helium flows through the electric heater, the sixth regeneration pipe, the cryogenic adsorber, the seventh regeneration pipe, the water-helium cooler, the gas-water separator, the third regeneration pipe and the diaphragm compressor in sequence, and flows back to the electric heater through the reflux pipe to form a third regeneration loop, and the third regeneration loop is suitable for regenerating the cryogenic adsorber.

[0034] According to some embodiments of the present invention, one end of the sixth regeneration pipe is connected to the fourth regeneration pipe and is located between the eleventh valve body and the fifteenth valve body, the other end of the sixth regeneration pipe is connected to the fifth purification pipe and is located at the rear end of the fourth valve group, and the ninth valve group includes a seventeenth valve body;

[0035] One end of the seventh regeneration tube is connected to the fifth regeneration tube and is located between the thirteenth valve body and the sixteenth valve body. The other end of the seventh regeneration tube is connected to the front end of the sixth purification tube and is located at the front end of the fifth valve group. The tenth valve group includes an eighteenth valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a self-regenerative helium purification system provided in some embodiments of the present invention;

[0038] Figure 2 It is a schematic structural diagram of a self-regenerative helium purification system in a purification operation state provided in some embodiments of the present invention;

[0039] Figure 3 A schematic diagram of the structure of a self-regenerating helium purification system provided in some embodiments of the present invention in a first regeneration loop state;

[0040] Figure 4 A schematic diagram of the structure of a self-regenerating helium purification system provided in some embodiments of the present invention in a second regeneration loop state;

[0041] Figure 5 It is a schematic structural diagram of a self-regenerating helium purification system in a third regeneration loop state provided in some embodiments of the present invention.

[0042] Description of reference numerals:

[0043] 1. Electric heater; 2. Copper oxide bed; 3. Water-helium cooler; 4. Gas-water separator; 5. First molecular sieve bed; 6. Low-temperature adsorber; 7. Diaphragm compressor; 8. Second molecular sieve bed; 9. Reflux pipeline; 101. First valve body; 102. Second valve body; 103. Third valve body; 104. Fourth valve body; 105. Fifth valve body; 106. Sixth valve body; 107. Seventh valve body; 108. Eighth valve body; 109. Ninth valve body; 110 , the tenth valve body; 111, the eleventh valve body; 112, the twelfth valve body; 113, the thirteenth valve body; 114, the fourteenth valve body; 115, the fifteenth valve body; 116, the sixteenth valve body; 117, the seventeenth valve body; 118, the eighteenth valve body; 121, the first bypass valve; 122, the second bypass valve; 123, the third bypass valve; 131, the second regulating valve; 132, the first control valve; 133, the second control valve; 91, the first regulating valve. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Reference Figures 1 to 5 The present invention provides a self-regenerative helium purification system, comprising: a purification operation loop, a purification valve group, a regeneration operation loop and a regeneration valve group; the purification operation loop comprises an electric heater 1, a copper oxide bed 2, a water-helium cooler 3, a gas-water separator 4, a first molecular sieve bed 5, a low-temperature adsorber 6 and a diaphragm compressor 7 which are arranged in sequence and connected through pipelines along the helium flow direction; the purification valve group is arranged on the purification operation loop; the regeneration operation loop comprises a reflux pipeline 9, one end of the reflux pipeline 9 is connected to the inlet end of the electric heater 1, and the other end of the reflux pipeline 9 is connected to the outlet end of the diaphragm compressor 7, and a first regulating valve 91 is arranged on the reflux pipeline 9; the regeneration valve group is arranged on the regeneration operation loop; when the system is in a purification operation state, the purification valve group is opened, and the regeneration valve group and the first regulating valve 91 are closed; when the system is in a regeneration operation state, the purification valve group is closed, and the regeneration valve group and the first regulating valve 91 are opened, and the first regulating valve 91 is suitable for adjusting and controlling the regeneration helium flow rate.

[0049] Specifically, the self-regenerative helium purification system integrates the purification operation loop and the regeneration operation loop, and the purification valve group and the regeneration valve group are respectively arranged on the purification operation loop and the regeneration operation loop to control the helium flow direction on the purification operation loop and the regeneration operation loop respectively, and the first regulating valve 91 is arranged on the reflux pipe 9 to control the regeneration helium flow rate. The present invention realizes the integration of helium purification and self-regeneration by arranging the purification valve group, the regeneration valve group and the first regulating valve 91, reduces the separate setting of the helium purification and regeneration system, simplifies the system configuration, and reduces the number of equipment, so as to achieve the purpose of reducing the occupation of equipment space and reducing maintenance costs and operating costs.

[0050] Reference Figure 2As shown, it can be understood that, in the operation state of the purification operation system, the purification valve group is placed in the open state, the regeneration valve group and the first regulating valve 91 are in the closed state, and the helium enters from the system inlet, flows through the electric heater 1, the copper oxide bed 2, the water helium cooler 3, the gas-water separator 4, the first molecular sieve bed 5, the low-temperature adsorber 6 and the diaphragm compressor 7 in sequence, and flows out from the system outlet, thereby achieving the removal of impurities such as H2, O2, CH4, CO, CO2, N2, H2O and radioactive inert gases in the helium. When the equipment in the system reaches a saturated state after running for a certain period of time, the purification efficiency decreases, resulting in an increase in the helium impurity content in the purification operation loop. At this time, the purification equipment needs to be regenerated to improve the purification efficiency of the purification equipment. At this time, it is necessary to close the purification valve group, open the regeneration valve group and the first regulating valve 91, and the diaphragm compressor 7 is used to provide the flow required for regeneration. The electric heater 1 is used to heat the helium for regeneration, the water-helium cooler 3 is used to cool the regenerated helium, and the gas-water separator 4 is used to separate the water in the regenerated helium. By adjusting the opening of the first regulating valve 91, the flow on the reflux pipe 9 is adjusted to control the flow reflux to the electric heater 1.

[0051] In some embodiments of the present invention, the purification operation loop further includes a first purification pipe, a second purification pipe, a third purification pipe, a fourth purification pipe, a fifth purification pipe, and a sixth purification pipe;

[0052] The two ends of the first purification tube are connected to the electric heater 1 and the copper oxide bed 2 respectively; the two ends of the second purification tube are connected to the copper oxide bed 2 and the water-helium cooler 3 respectively; the two ends of the third purification tube are connected to the water-helium cooler 3 and the gas-water separator 4 respectively; the two ends of the fourth purification tube are connected to the gas-water separator 4 and the first molecular sieve bed 5 respectively; the two ends of the fifth purification tube are connected to the first molecular sieve bed 5 and the low-temperature adsorber 6 respectively; the two ends of the sixth purification tube are connected to the low-temperature adsorber 6 and the diaphragm compressor 7 respectively;

[0053] The purification valve group includes a first valve group, a second valve group, a third valve group, a fourth valve group and a fifth valve group. The first valve group is arranged on the first purification pipe, the second valve group is arranged on the second purification pipe; the third valve group is arranged on the fourth purification pipe, the fourth valve group is arranged on the fifth purification pipe, and the fifth valve group is arranged on the sixth purification pipe.

[0054] Specifically, the electric heater 1 and the copper oxide bed 2 are spaced apart by the first valve group, the copper oxide bed 2 and the water-helium cooler 3 are spaced apart by the second valve group, the gas-water separator 4 and the first molecular sieve bed 5 are spaced apart by the third valve group, the low-temperature adsorber 6 and the diaphragm compressor 7 are spaced apart by the fifth valve group, the water-helium cooler 3 and the gas-water separator 4 are used together, and the setting of the purification valve group can realize the maintenance and inspection of individual equipment components, maintain the steady-state operation of the system, avoid the shutdown of the system during the maintenance process, and reduce the shutdown cost.

[0055] In some embodiments of the present invention, the first valve group includes a first valve body 101 and a second valve body 102 arranged in series; the second valve group includes a third valve body 103 and a fourth valve body 104 arranged in series; the third valve group includes a fifth valve body 105 and a sixth valve body 106 arranged in series, the fourth valve group includes a seventh valve body 107 and an eighth valve body 108 arranged in series, and the fifth valve group includes a ninth valve body 109 and a tenth valve body 110 arranged in series;

[0056] A first bypass pipe is provided in parallel with the copper oxide bed 2, one end of the first bypass pipe is connected to the first purification pipe, and the other end of the first bypass pipe is connected to the second purification pipe. A first bypass valve 121 is provided on the first bypass pipe;

[0057] A second bypass pipe is provided in parallel with the first molecular sieve bed 5, one end of the second bypass pipe is connected to the fourth purification pipe, and the other end of the second bypass pipe is connected to the fifth purification pipe. A second bypass valve 122 is provided on the second bypass pipe.

[0058] A third bypass pipe is provided in parallel with the low temperature adsorber 6 , one end of the third bypass pipe is connected to the fifth purification pipe, the other end of the third bypass pipe is connected to the sixth purification pipe, and a third bypass valve 123 is provided on the third bypass pipe.

[0059] Specifically, the first bypass pipeline, the second bypass pipeline and the third bypass pipeline are provided to bypass the copper oxide bed 2, the first molecular sieve bed 5 and the low-temperature adsorber 6, thereby improving the stability of the system.

[0060] In some embodiments of the present invention, one end of the first bypass pipe communicating with the first purification pipe is located between the first valve body 101 and the second valve body 102; the other end of the first bypass pipe communicating with the second purification pipe is located between the third valve body 103 and the fourth valve body 104;

[0061] One end of the second bypass pipe communicating with the fourth purification pipe is located between the fifth valve body 105 and the sixth valve body 106, and the other end of the second bypass pipe communicating with the fifth purification pipe is located between the seventh valve body 107 and the eighth valve body 108;

[0062] One end of the third bypass pipe communicating with the fifth purification pipe is located between the seventh valve body 107 and the eighth valve body 108 , and the other end of the third bypass pipe communicating with the sixth purification pipe is located between the ninth valve body 109 and the tenth valve body 110 .

[0063] Reference Figure 3As shown, in some embodiments of the present invention, the regeneration operation loop includes a first regeneration pipe, a second regeneration pipe and a third regeneration pipe, the two ends of the first regeneration pipe are respectively connected to the outlet end of the electric heater 1 and the inlet end of the copper oxide bed 2; the two ends of the second regeneration pipe are respectively connected to the outlet end of the copper oxide bed 2 and the inlet end of the water-helium cooler 3, one end of the third regeneration pipe is connected to the outlet end of the gas-water separator 4, and the other end of the third regeneration pipe is connected to the inlet end of the diaphragm compressor 7;

[0064] The regeneration valve group includes a sixth valve group and a seventh valve group. The sixth valve group is arranged on the first regeneration pipe, and the seventh valve group is arranged on the second regeneration pipe. The third regeneration pipe is provided with a second regulating valve 131.

[0065] The purification valve group is closed, and the sixth valve group, the seventh valve group, the first regulating valve 91 and the second regulating valve 131 are all opened; the helium flows through the electric heater 1, the first regeneration pipe, the copper oxide bed 2, the second regeneration pipe, the water-helium cooler 3, the third purification pipe, the gas-water separator 4, the third regeneration pipe and the diaphragm compressor 7 in sequence, and flows back to the electric heater 1 through the reflux pipe 9 to form a first regeneration loop, which is used to regenerate the copper oxide bed 2.

[0066] Specifically, the purification valve group on the purification operation loop is placed in a closed state, and the sixth valve group, the seventh valve group, the first regulating valve 91 and the second regulating valve 131 are opened, so that the system can be placed in an oxidation coaxial regeneration operation condition, the diaphragm compressor 7 provides the circulating pressure of the regenerated helium, and the opening of the first regulating valve 91 controls the regenerated helium flow rate. The helium gas flows through the electric heater 1 and is heated to the regeneration temperature of the copper oxide bed 2 and enters the copper oxide bed 2. The helium at the outlet of the copper oxide bed 2 is cooled and dehumidified by the water-helium cooler 3 and the gas-water separator 4 and then returns to the diaphragm compressor 7.

[0067] In some embodiments of the present invention, one end of the first regeneration pipe is connected to the front end of the first purification pipe and is located at the front end of the first valve group, the other end of the first regeneration pipe is connected to the rear end of the first purification pipe and is located at the rear end of the first valve group, the sixth valve group is arranged in parallel with the first valve group, and the sixth valve group includes an eleventh valve body 111 and a twelfth valve body 112 arranged in series;

[0068] One end of the second regeneration pipe is connected to the front end of the second purification pipe and is located at the front end of the second valve group, the other end of the second regeneration pipe is connected to the rear end of the second purification pipe and is located at the rear end of the second valve group, the seventh valve group is arranged in parallel with the second valve group, and the seventh valve group includes a thirteenth valve body 113 and a fourteenth valve body 114 arranged in series;

[0069] One end of the third regeneration pipe is connected to the front end of the fourth purification pipe and is located at the front end of the third valve group, and the other end of the third regeneration pipe is connected to the rear end of the sixth purification pipe and is located at the rear end of the fifth valve group.

[0070] Reference Figure 4 As shown, in some embodiments of the present invention, a second molecular sieve bed 8 is provided on the third regeneration pipe, the second molecular sieve bed 8 is arranged in parallel with the second regulating valve 131, and a first control valve 132 and a second control valve 133 are respectively provided before and after the second molecular sieve bed 8;

[0071] The regeneration operation loop further includes a fourth regeneration pipe and a fifth regeneration pipe, one end of the fourth regeneration pipe is connected to the outlet end of the electric heater 1, the other end of the fourth regeneration pipe is connected to the inlet end of the first molecular sieve bed 5, one end of the fifth regeneration pipe is connected to the outlet end of the first molecular sieve bed 5, and the other end of the fifth regeneration pipe is connected to the inlet end of the water-helium cooler 3;

[0072] The regeneration valve group also includes a seventh valve group and an eighth valve group, the seventh valve group is arranged on the fourth regeneration pipe, and the eighth valve group is arranged on the fifth regeneration pipe;

[0073] The purification valve group and the second regulating valve 131 are closed, and the first regulating valve 91, the first control valve 132, the second control valve 133, the seventh valve group and the eighth valve group are opened; the helium flows through the electric heater 1, the fourth regeneration pipe, the first molecular sieve bed 5, the fifth regeneration pipe, the water-helium cooler 3, the third purification pipe, the gas-water separator 4, the third regeneration pipe, the second molecular sieve bed 8 and the diaphragm compressor 7 in sequence, and flows back to the electric heater 1 through the reflux pipe 9 to form a second regeneration loop, which is suitable for regenerating the first molecular sieve bed 5.

[0074] Specifically, the regeneration outflow of the first molecular sieve bed 5 is similar to the regeneration process of the copper oxide bed 2, that is, the purification valve group on the purification operation loop is placed in a closed state, and the first regulating valve 91, the first control valve 132, the second control valve 133, the seventh valve group and the eighth valve group are opened. After the helium is heated by the electric heater 1, it passes through the first molecular sieve bed 5, the water-helium cooler 3 and the gas-water separator 4, the second molecular sieve bed 8 in sequence, and returns to the diaphragm compressor 7. The reflux pipe 9 connects the outlet end of the diaphragm compressor 7 and the inlet end of the electric heater 1 to form a loop. The setting of the second molecular sieve bed 8 improves the purification effect, and the helium after being dehumidified by the gas-water separator 4 enters the second molecular sieve bed 8 for further dehumidification.

[0075] In some embodiments of the present invention, one end of the fourth regeneration pipe is connected to the first regeneration pipe and is located between the eleventh valve body 111 and the twelfth valve body 112, and the other end of the fourth regeneration pipe is connected to the fourth purification pipe and is located at the rear end of the third valve group; the seventh valve group includes a fifteenth valve body 115;

[0076] One end of the fifth regeneration pipe is connected to the second regeneration pipe and is located between the thirteenth valve body 113 and the fourteenth valve body 114 . The other end of the fifth regeneration pipe is connected to the front end of the fifth purification pipe and is located at the front end of the fourth valve group. The eighth valve group includes the sixteenth valve body 116 .

[0077] It can be understood that the fourth regeneration pipe is connected with the first regeneration pipe, and the fifth regeneration pipe is connected with the second regeneration pipe, so as to realize the switching of the first regeneration circuit and the second regeneration circuit by controlling the opening of the eleventh valve body 111 and the fourteenth valve body 114 and the closing of the twelfth valve body 112 and the thirteenth valve body 113, thereby reducing the layout of pipelines, reducing the occupation of construction space and reducing construction costs.

[0078] Reference Figure 5 As shown, in some embodiments of the present invention, the regeneration operation loop further includes a sixth regeneration pipe and a seventh regeneration pipe, one end of the sixth regeneration pipe is connected to the outlet end of the electric heater 1, and the other end of the sixth regeneration pipe is connected to the inlet end of the low-temperature adsorber 6; one end of the seventh regeneration pipe is connected to the outlet end of the low-temperature adsorber 6, and the other end of the seventh regeneration pipe is connected to the inlet end of the water-helium cooler 3;

[0079] The regeneration valve group also controls the ninth valve group and the tenth valve group. The ninth valve group is arranged on the sixth regeneration pipe, and the tenth valve group is arranged on the seventh regeneration pipe.

[0080] The purification valve group, the first control valve 132 and the second control valve 133, the ninth valve group, the tenth valve group, the first regulating valve 91 and the second regulating valve 131 are opened, and the helium flows through the electric heater 1, the sixth regeneration pipe, the low-temperature adsorber 6, the seventh regeneration pipe, the water-helium cooler 3, the gas-water separator 4, the third regeneration pipe and the diaphragm compressor 7 in sequence, and flows back to the electric heater 1 through the reflux pipe 9 to form a third regeneration circuit, which is suitable for regenerating the low-temperature adsorber 6.

[0081] In some embodiments of the present invention, one end of the sixth regeneration pipe is connected to the fourth regeneration pipe and is located between the eleventh valve body 111 and the fifteenth valve body 115, the other end of the sixth regeneration pipe is connected to the fifth purification pipe and is located at the rear end of the fourth valve group, and the ninth valve group includes a seventeenth valve body 117;

[0082] One end of the seventh regeneration pipe is connected to the fifth regeneration pipe and is located between the thirteenth valve body 113 and the sixteenth valve body 116 . The other end of the seventh regeneration pipe is connected to the front end of the sixth purification pipe and is located at the front end of the fifth valve group. The tenth valve group includes the eighteenth valve body 118 .

[0083] Similarly, the sixth regeneration pipe is connected with the fourth regeneration pipe, the seventh regeneration pipe is connected with the fifth regeneration pipe, the twelfth valve body 112, the thirteenth valve body 113, the fifteenth valve body 115 and the sixteenth valve body 116 are closed, and the eleventh valve body, the fourteenth valve body 114, the seventeenth valve body 117 and the eighteenth valve body 118 are opened to realize the opening of the third regeneration circuit, and the switching of the first regeneration circuit, the second regeneration circuit and the third regeneration circuit is realized by controlling the valve bodies, thereby reducing the operation and maintenance costs and simplifying the operation.

[0084] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A self-regenerating helium purification system, characterized in that: include: A purification operation loop, the purification operation loop comprising an electric heater (1), a copper oxide bed (2), a water-helium cooler (3), a gas-water separator (4), a first molecular sieve bed (5), a low-temperature adsorber (6) and a diaphragm compressor (7) which are sequentially connected and arranged along the helium flow direction through pipelines; A purification valve group is arranged on the purification operation circuit; A regeneration operation loop comprises a return pipe (9), one end of the return pipe (9) is connected to the inlet end of the electric heater (1), the other end of the return pipe (9) is connected to the outlet end of the diaphragm compressor (7), and a first regulating valve (91) is provided on the return pipe (9); A regeneration valve group is arranged on the regeneration operation circuit; When the system is in a purification operation state, the purification valve group is opened, and the regeneration valve group and the first regulating valve (91) are closed; When the system is in a regeneration operation state, the purification valve group is closed, the regeneration valve group and the first regulating valve (91) are opened, and the first regulating valve (91) is suitable for regulating and controlling the regeneration helium flow rate.

2. The self-regenerating helium purification system according to claim 1, characterized in that: The purification operation loop also includes a first purification pipe, a second purification pipe, a third purification pipe, a fourth purification pipe, a fifth purification pipe and a sixth purification pipe; The two ends of the first purification pipe are respectively connected to the electric heater (1) and the copper oxide bed (2); the two ends of the second purification pipe are respectively connected to the copper oxide bed (2) and the water-helium cooler (3); the two ends of the third purification pipe are respectively connected to the water-helium cooler (3) and the gas-water separator (4); the two ends of the fourth purification pipe are respectively connected to the gas-water separator (4) and the first molecular sieve bed (5); the two ends of the fifth purification pipe are respectively connected to the first molecular sieve bed (5) and the low-temperature adsorber (6); the two ends of the sixth purification pipe are respectively connected to the low-temperature adsorber (6) and the diaphragm compressor (7); The purification valve group includes a first valve group, a second valve group, a third valve group, a fourth valve group and a fifth valve group. The first valve group is arranged on the first purification pipe, and the second valve group is arranged on the second purification pipe; the third valve group is arranged on the fourth purification pipe, the fourth valve group is arranged on the fifth purification pipe, and the fifth valve group is arranged on the sixth purification pipe.

3. The self-regenerating helium purification system according to claim 2, characterized in that: The first valve group comprises a first valve body (101) and a second valve body (102) arranged in series; the second valve group comprises a third valve body (103) and a fourth valve body (104) arranged in series; the third valve group comprises a fifth valve body (105) and a sixth valve body (106) arranged in series, the fourth valve group comprises a seventh valve body (107) and an eighth valve body (108) arranged in series, and the five-valve group comprises a ninth valve body (109) and a tenth valve body (110) arranged in series; The copper oxide bed (2) is provided with a first bypass pipe in parallel, one end of the first bypass pipe is connected to the first purification pipe, the other end of the first bypass pipe is connected to the second purification pipe, and the first bypass pipe is provided with a first bypass valve (121); A second bypass pipe is provided in parallel with the first molecular sieve bed (5), one end of the second bypass pipe is connected to the fourth purification pipe, the other end of the second bypass pipe is connected to the fifth purification pipe, and a second bypass valve (122) is provided on the second bypass pipe; The low-temperature adsorber (6) is provided with a third bypass pipe in parallel, one end of the third bypass pipe is connected to the fifth purification pipe, the other end of the third bypass pipe is connected to the sixth purification pipe, and a third bypass valve (123) is provided on the third bypass pipe.

4. The self-regenerating helium purification system according to claim 3, characterized in that: One end of the first bypass pipe communicating with the first purification pipe is located between the first valve body (101) and the second valve body (102); the other end of the first bypass pipe communicating with the second purification pipe is located between the third valve body (103) and the fourth valve body (104); One end of the second bypass pipe communicating with the fourth purification pipe is located between the fifth valve body (105) and the sixth valve body (106), and the other end of the second bypass pipe communicating with the fifth purification pipe is located between the seventh valve body (107) and the eighth valve body (108); One end of the third bypass pipe communicating with the fifth purification pipe is located between the seventh valve body (107) and the eighth valve body (108), and the other end of the third bypass pipe communicating with the sixth purification pipe is located between the ninth valve body (109) and the tenth valve body (110).

5. The self-regenerating helium purification system according to claim 2, characterized in that: The regeneration operation loop comprises a first regeneration pipe, a second regeneration pipe and a third regeneration pipe, wherein two ends of the first regeneration pipe are respectively connected to the outlet end of the electric heater (1) and the inlet end of the copper oxide bed (2); two ends of the second regeneration pipe are respectively connected to the outlet end of the copper oxide bed (2) and the inlet end of the water-helium cooler (3); one end of the third regeneration pipe is connected to the outlet end of the gas-water separator (4), and the other end of the third regeneration pipe is connected to the inlet end of the diaphragm compressor (7); The regeneration valve group comprises a sixth valve group and a seventh valve group, the sixth valve group is arranged on the first regeneration pipe, and the seventh valve group is arranged on the second regeneration pipe; the third regeneration pipe is provided with a second regulating valve (131); The purification valve group is closed, and the sixth valve group, the seventh valve group, the first regulating valve (91) and the second regulating valve (131) are all opened; the helium gas flows through the electric heater (1), the first regeneration pipe, the copper oxide bed (2), the second regeneration pipe, the water-helium cooler (3), the third purification pipe, the gas-water separator (4), the third regeneration pipe and the diaphragm compressor (7) in sequence, and flows back to the electric heater (1) through the reflux pipe (9) to form a first regeneration loop, and the first regeneration loop is used to regenerate the copper oxide bed (2).

6. The self-regenerating helium purification system according to claim 5, characterized in that: One end of the first regeneration pipe is connected to the front end of the first purification pipe and is located at the front end of the first valve group, the other end of the first regeneration pipe is connected to the rear end of the first purification pipe and is located at the rear end of the first valve group, the sixth valve group is arranged in parallel with the first valve group, and the sixth valve group includes an eleventh valve body (111) and a twelfth valve body (112) arranged in series; One end of the second regeneration pipe is connected to the front end of the second purification pipe and is located at the front end of the second valve group, the other end of the second regeneration pipe is connected to the rear end of the second purification pipe and is located at the rear end of the second valve group, the seventh valve group is arranged in parallel with the second valve group, and the seventh valve group includes a thirteenth valve body (113) and a fourteenth valve body (114) arranged in series; One end of the third regeneration pipe is connected to the front end of the fourth purification pipe and is located at the front end of the third valve group, and the other end of the third regeneration pipe is connected to the rear end of the sixth purification pipe and is located at the rear end of the fifth valve group.

7. The self-regenerating helium purification system according to claim 6, characterized in that: A second molecular sieve bed (8) is provided on the third regeneration pipe, the second molecular sieve bed (8) is arranged in parallel with the second regulating valve (131), and a first control valve (132) and a second control valve (133) are respectively provided before and after the second molecular sieve bed (8); The regeneration operation loop further comprises a fourth regeneration pipe and a fifth regeneration pipe, one end of the fourth regeneration pipe is connected to the outlet end of the electric heater (1), the other end of the fourth regeneration pipe is connected to the inlet end of the first molecular sieve bed (5), one end of the fifth regeneration pipe is connected to the outlet end of the first molecular sieve bed (5), and the other end of the fifth regeneration pipe is connected to the inlet end of the water-helium cooler (3); The regeneration valve group further includes a seventh valve group and an eighth valve group, the seventh valve group is arranged on the fourth regeneration pipe, and the eighth valve group is arranged on the fifth regeneration pipe; The purification valve group and the second regulating valve (131) are closed, and the first regulating valve (91), the first control valve (132), the second control valve (133), the seventh valve group and the eighth valve group are opened; the helium gas flows through the electric heater (1), the fourth regeneration pipe, the first molecular sieve bed (5), the fifth regeneration pipe, the water-helium cooler (3), the third purification pipe, the gas-water separator (4), the third regeneration pipe, the second molecular sieve bed (8) and the diaphragm compressor (7) in sequence, and flows back to the electric heater (1) through the reflux pipe (9) to form a second regeneration loop, and the second regeneration loop is suitable for regenerating the first molecular sieve bed (5).

8. The self-regenerating helium purification system according to claim 7, characterized in that: One end of the fourth regeneration pipe is connected to the first regeneration pipe and is located between the eleventh valve body (111) and the twelfth valve body (112); the other end of the fourth regeneration pipe is connected to the fourth purification pipe and is located at the rear end of the third valve group; the seventh valve group includes a fifteenth valve body (115); One end of the fifth regeneration pipe is connected to the second regeneration pipe and is located between the thirteenth valve body (113) and the fourteenth valve body (114), the other end of the fifth regeneration pipe is connected to the front end of the fifth purification pipe and is located at the front end of the fourth valve group, and the eighth valve group includes a sixteenth valve body (116).

9. The self-regenerating helium purification system according to claim 8, characterized in that: The regeneration operation loop further comprises a sixth regeneration pipe and a seventh regeneration pipe, one end of the sixth regeneration pipe being in communication with the outlet end of the electric heater (1), and the other end of the sixth regeneration pipe being in communication with the inlet end of the low-temperature adsorber (6); one end of the seventh regeneration pipe being in communication with the outlet end of the low-temperature adsorber (6), and the other end of the seventh regeneration pipe being in communication with the inlet end of the water-helium cooler (3); The regeneration valve group also controls a ninth valve group and a tenth valve group, wherein the ninth valve group is arranged on the sixth regeneration pipe, and the tenth valve group is arranged on the seventh regeneration pipe; The purification valve group, the first control valve (132) and the second control valve (133), the ninth valve group, the tenth valve group, the first regulating valve (91) and the second regulating valve (131) are opened, and the helium flows through the electric heater (1), the sixth regeneration pipe, the low-temperature adsorber (6), the seventh regeneration pipe, the water-helium cooler (3), the gas-water separator (4), the third regeneration pipe and the diaphragm compressor (7) in sequence, and flows back to the electric heater (1) through the reflux pipe (9) to form a third regeneration circuit, and the third regeneration circuit is suitable for regenerating the low-temperature adsorber (6).

10. The self-regenerating helium purification system according to claim 9, characterized in that: One end of the sixth regeneration pipe is connected to the fourth regeneration pipe and is located between the eleventh valve body (111) and the fifteenth valve body (115); the other end of the sixth regeneration pipe is connected to the fifth purification pipe and is located at the rear end of the fourth valve group; the ninth valve group includes a seventeenth valve body (117); One end of the seventh regeneration pipe is connected to the fifth regeneration pipe and is located between the thirteenth valve body and the sixteenth valve body. The other end of the seventh regeneration pipe is connected to the front end of the sixth purification pipe and is located at the front end of the fifth valve group. The tenth valve group includes an eighteenth valve body (118).

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