Helium purification and regeneration system and debugging method

Abstract

The invention relates to the technical field of high-temperature gas cooled reactor engineering coolant purification systems, and discloses a helium purification and regeneration system and a debugging method.A helium purification system and a helium purification and regeneration system are connected to form a regeneration loop, test preconditions are set, test technical indexes are checked, a cold state test is conducted firstly, and then a hot state test is conducted; vacuumizing the regeneration loop after the cold-state test, then supplementing helium to 0.6 Mpa, sequentially starting a membrane press and an electric heater in the helium purification regeneration system, regulating and controlling a pressure parameter, a flow parameter, an outlet temperature of the electric heater, an inlet and outlet temperature of purification equipment and a liquid level parameter of a gas-water separator in a test operation process, and starting the membrane press and the electric heater in the helium purification regeneration system; and whether the functions of the helium purification and regeneration system are complete or not is fully verified so as to ensure that purification equipment of the helium purification system can be regenerated and ensure that the helium quality meets the operation requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of the coolant purification system for high-temperature gas-cooled reactor engineering, and particularly relates to a helium purification and regeneration system and a commissioning method thereof. Background Art

[0002] A high-temperature gas-cooled reactor is a high-temperature reactor that uses graphite as a moderator and helium as a coolant, and is an advanced nuclear reactor with inherent safety, high power generation efficiency, and extremely wide applications. During the operation of a high-temperature gas-cooled reactor, due to nuclear fuel nuclide fission, micro-leakage of the steam generator, atmosphere switching of the fuel handling system, loading of new fuel, etc., the impurity concentration in the primary coolant helium gas will increase. These impurities include carbon monoxide, carbon dioxide, nitrogen, oxygen, methane, hydrogen, water, krypton, xenon, etc. The harm of impurities to the reactor is mainly manifested in three aspects. First, the impurity water and oxygen will corrode the fuel elements and graphite components. Second, the impurity hydrogen infiltrates into the in-core metal components, resulting in hydrogen embrittlement and decarburization phenomena, leading to corrosion and cracks, and the process is faster at higher temperatures. In addition, the impurities krypton and xenon increase the radioactive level of the primary loop of the reactor. Therefore, a purification system is required to purify the helium gas.

[0003] When the impurity gas adsorbed by the purification equipment in the helium purification system reaches the working saturation, a helium purification and regeneration system is required to regenerate the purification equipment. There are two working modes for the traditional helium purification and regeneration system. One is the periodic regeneration of the purification column: when the reactor is operating normally, after each normal purification column in the helium purification system has continuously worked for more than 1800 hours, the impurity gas adsorbed by the purification equipment may approach or reach the working saturation state, and a working switch is required to put this purification column into the regeneration system for operation, and the present system is used to regenerate the purification equipment of the working-saturated normal purification column one by one in sequence. The other mode is the partial regeneration of the purification equipment: during normal operation, due to the premature working saturation of a certain purification equipment in the helium purification system, it needs to be regenerated, and this system can be put into operation to regenerate the equipment to be regenerated alone.

[0004] The helium purification and regeneration system is an important auxiliary system of the helium purification system and is a prerequisite for the helium purification system test, directly affecting the helium purification system test and the purification efficiency of the primary loop gas medium. Before the helium purification and regeneration system is put into operation, it needs to be commissioned to ensure that the helium gas quality meets the operation requirements. Summary of the Invention

[0005] In view of this, the present invention provides a helium purification and regeneration system and a commissioning method thereof to fully verify the system functions of the helium purification and regeneration system and ensure that the helium gas quality can meet the operation requirements.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] In a first aspect, the present invention provides a debugging method for a helium purification and regeneration system, comprising the following steps:

[0008] Connect the helium purification and regeneration system to the helium purification system, and set test prerequisite conditions for the helium purification and regeneration system and the helium purification system;

[0009] Check the test technical indicators of the helium purification and regeneration system and the helium purification system to determine that the helium purification and regeneration system and the helium purification system meet the test conditions;

[0010] Conduct a cold-state test. The helium purification and regeneration system forms a regeneration loop for the copper oxide bed, molecular sieve bed, cryogenic activated carbon bed, and cryogenic helium / helium heat exchanger of the helium purification system through switching valves respectively, start the diaphragm compressor to operate in a cycle, and check the operating parameters;

[0011] Conduct a hot-state test. Debug the electric heater of the helium purification and regeneration system. After evacuating the helium purification system and the helium purification and regeneration system, replenish helium gas to 0.6 MPa. Through switching valves, form separate heating loops for the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger respectively. Sequentially start the membrane compressor and electric heater of the helium purification and regeneration system, and conduct activation regeneration on the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger of the helium purification system respectively, and regulate the operating pressure parameters, flow parameters, outlet temperature of the electric heater, inlet and outlet temperatures of the purification equipment, and liquid level parameters of the gas-water separator.

[0012] It has the following advantages: Connect the helium purification system to the helium purification and regeneration system to form a regeneration loop, set test prerequisite conditions, check test technical indicators, first conduct a cold-state test. In the cold-state environment, introduce helium gas into the regeneration loop to check the smoothness and sealing performance of the loop during operation. On the premise of determining that the cold-state test is completed, conduct a hot-state test. Evacuate the regeneration loop after the cold-state test, and then replenish helium gas to 0.6 Mpa. Sequentially start the membrane compressor and electric heater in the helium purification and regeneration system. The membrane compressor provides driving force to drive the flow of helium gas, and the electric heater is used to increase the temperature of the helium gas in the regeneration loop. Through switching valves, conduct hot-state tests on the activation regeneration loops of the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger in the helium purification system respectively, and regulate the pressure parameters, flow parameters, outlet temperature of the electric heater, inlet and outlet temperatures of the purification equipment, and liquid level parameters of the gas-water separator during the test operation, fully verifying whether the functions of the helium purification and regeneration system are complete to ensure that the purification equipment of the helium purification system can be activated and regenerated, and ensuring that the helium gas quality meets the operation requirements.

[0013] According to the embodiment of the first aspect of the present invention, the test prerequisite conditions include cold-state test prerequisite conditions and hot-state test prerequisite conditions;

[0014] The preconditions for the cold test include: the cooling water supply system and the vacuum pumping system are complete; the drainage equipment of the helium supply and storage system and the helium auxiliary system is complete; the single-unit test of the membrane compressor and the valve test of the helium purification and regeneration system are completed;

[0015] The preconditions for the hot test include: the thermal instruments of the helium purification system and the helium purification and regeneration system are complete; the exhaust equipment of the helium auxiliary system is complete; the gas sampling and analysis system is complete; the loop of the helium purification and regeneration system is in a helium environment.

[0016] According to the first aspect embodiment of the present invention, the test technical indicators include cold test indicators and hot test indicators;

[0017] The cold test indicators include: in the helium purification system, the regeneration circuits formed by connecting the copper oxide bed, the molecular sieve bed, the cryogenic activated carbon bed, the cryogenic helium / helium heat exchanger and the helium purification and regeneration system operate smoothly, and the instrument display parameters are normal; the drainage function of the gas-liquid separator of the helium purification and regeneration system to the drainage equipment of the helium auxiliary system meets the design requirements;

[0018] The hot test indicators include: during the regeneration operation of the purification equipment in the helium purification system, the inlet temperature of the copper oxide bed in the helium purification system is 70°C - 100°C; the average inlet and outlet temperature of the molecular sieve bed in the helium purification system is greater than 200°C; the average inlet and outlet temperature of the activated carbon bed in the helium purification system is greater than 150°C; when assisting the regeneration of the molecular sieve bed, the outlet temperature of the electric heater in the helium purification system is greater than 250°C; the outlet temperature of the water-helium cooler in the helium purification system is less than 15°C.

[0019] According to the first aspect embodiment of the present invention, in the cold test, water is injected into the gas-liquid separator of the helium purification system through a temporary test device to verify the drainage function of the gas-liquid separator.

[0020] According to the first aspect embodiment of the present invention, in the hot test, the copper oxide bed of the helium purification system is placed in a regeneration state, and the helium gas flow parameter in the regeneration circuit is controlled to reach 25 kg / h; the inlet temperature of the copper oxide bed of the helium purification system is controlled to be 80°C, and oxygen is injected into the inlet of the copper oxide bed;

[0021] In the hot test, the molecular sieve bed of the helium purification system is placed in a regeneration state, the helium gas flow parameter in the regeneration circuit is controlled to reach 50 kg / h, and the temperature of the molecular sieve bed reaches 250°C;

[0022] In the hot state test, the cryo-adsorber of the helium purification system is placed in the regeneration state, and the cryogenic helium / helium heat exchanger is controlled to operate in heating and purging mode. The helium flow rate parameter in the regeneration loop is 25 kg / h, and the temperatures of the cryo-adsorber and the cryogenic helium / helium heat exchanger reach 150 °C.

[0023] In the hot state test, the auxiliary molecular sieve bed of the helium purification system is placed in the regeneration state, and the helium flow rate parameter in the regeneration loop is controlled to be 50 kg / h, and the regeneration temperature of the auxiliary molecular sieve bed reaches 250 °C.

[0024] In a second aspect, the present invention also provides a helium purification and regeneration system, which is applied to the coolant purification and regeneration process of a high-temperature gas-cooled reactor nuclear power plant, and includes: a heat exchanger, a first gas-water separator, a first molecular sieve bed, a membrane compressor unit, and a first electric heater, which are sequentially connected and arranged along the helium flow direction; the front end of the heat exchanger is communicated with the outlet end of the purification equipment of the helium purification system; the rear end of the first electric heater is communicated with the inlet end of the helium purification system, so that the helium purification and regeneration system and the helium purification system form a regeneration loop; a first valve body is provided between the heat exchanger and the outlet end of the purification equipment of the helium purification system; a second valve body is provided between the first electric heater and the outlet end of the purification equipment of the helium purification system; one end of the reflux pipeline is communicated with the front end of the heat exchanger and is located between the heat exchanger and the first valve body, and the other end of the reflux pipeline is communicated with the outlet end of the purification equipment of the helium purification system and is located between the second valve body and the purification equipment of the helium purification system, and a third valve body is provided on the reflux pipeline.

[0025] According to the embodiment of the second aspect of the present invention, the membrane compressor unit includes a first membrane compressor and a second membrane compressor arranged in parallel. A first inlet valve and a first outlet valve are respectively provided at the front and rear ends of the first membrane compressor; a second inlet valve and a second outlet valve are respectively provided at the front and rear ends of the second membrane compressor.

[0026] According to the embodiment of the second aspect of the present invention, a plurality of inlets are provided at the front end of the first valve body, and a plurality of outlets are provided at the rear end of the second valve body to be adapted to connect to a plurality of purification equipment of the helium purification system to form a plurality of loops.

[0027] According to the embodiment of the second aspect of the present invention, a second electric heater is further provided between the second valve body and the purification equipment of the helium purification system.

[0028] According to the embodiment of the second aspect of the present invention, the first valve body, the second valve body, and the third valve body are all electric valves. Description of the Drawings

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a process view of a helium purification and regeneration system in the embodiments of the second aspect of the present invention;

[0031] Explanation of the reference numerals:

[0032] 1. Heat exchanger; 2. First gas-water separator; 3. First molecular sieve bed; 4. Membrane compressor unit; 5. First electric heater; 6. Second electric heater; 7. First valve body; 8. Second valve body; 9. Third valve body. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] In a first aspect, the present invention provides a debugging method for a helium purification and regeneration system, comprising the following steps:

[0038] Connect the helium purification and regeneration system to the helium purification system, and set test prerequisite conditions for the helium purification and regeneration system and the helium purification system;

[0039] Check the test technical indicators of the helium purification and regeneration system and the helium purification system to determine that the helium purification and regeneration system and the helium purification system meet the test conditions;

[0040] Conduct a cold test. The helium purification and regeneration system forms a regeneration loop for the copper oxide bed, molecular sieve bed, cryogenic activated carbon bed, and cryogenic helium / helium heat exchanger of the helium purification system through switching valves respectively, start the diaphragm compressor to circulate, and check the operating parameters;

[0041] Conduct a hot test. Debug the electric heater of the helium purification and regeneration system. After evacuating the helium purification system and the helium purification and regeneration system, replenish helium gas to 0.6 MPa. Through switching valves, separate heating loops for the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger are formed respectively. Start the membrane compressor and electric heater of the helium purification and regeneration system in sequence, and activate and regenerate the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger of the helium purification system respectively, and regulate the operating pressure parameters, flow parameters, outlet temperature of the electric heater, inlet and outlet temperatures of the purification equipment, and liquid level parameters of the gas-water separator.

[0042] Specifically, connect the relevant purification equipment of the helium purification system to the helium purification and regeneration system to form a regeneration loop, set test prerequisite conditions, check the test technical indicators, first conduct a cold test. In a cold environment, introduce helium gas into the regeneration loop to check the smoothness and sealing performance of the loop during operation. On the premise of determining that the cold test is completed, conduct a hot test. Evacuate the regeneration loop after the cold test, and then replenish helium gas to 0.6 Mpa. Start the membrane compressor and electric heater in the helium purification and regeneration system in sequence. The membrane compressor provides driving force to drive the flow of helium gas, and the electric heater is used to increase the temperature of the helium gas in the regeneration loop. Through switching valves, conduct hot tests on the activation and regeneration loops of the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger in the helium purification system in sequence, and regulate the pressure parameters, flow parameters, outlet temperature of the electric heater, inlet and outlet temperatures of the purification equipment, and liquid level parameters of the gas-water separator during the test operation to fully verify whether the function of the helium purification and regeneration system is complete, so as to ensure that the purification equipment of the helium purification system can be activated and regenerated, and ensure that the helium gas quality meets the operation requirements.

[0043] In the embodiments of the first aspect of the present invention, the preconditions for the test include the preconditions for the cold test and the preconditions for the hot test;

[0044] The preconditions for the cold test include: the cooling water supply system and the vacuum pumping system are complete; the drainage equipment of the helium supply and storage system and the helium auxiliary system is complete; the single-unit test of the membrane compressor and the valve test of the helium purification and regeneration system are completed;

[0045] The preconditions for the hot test include: the thermal instruments of the helium purification system and the helium purification and regeneration system are complete; the exhaust equipment of the helium auxiliary system is complete; the gas sampling and analysis system is complete; the loop of the helium purification and regeneration system is in a helium environment.

[0046] It can be understood that before commissioning, the preconditions for the test need to be set to ensure the normal operation of the commissioning. Among them, it is necessary to ensure the normal operation of the cooling water supply system to ensure the timely cooling of the helium purification system and the helium purification and regeneration system and ensure the stability of the system; it is necessary to ensure the completeness of the vacuum pumping system. In the hot test, the regeneration loop needs to be evacuated, so it is necessary to ensure the normal operation of the vacuum pumping system before the test; the helium supply and storage system is used for the supply and storage of helium; the drainage equipment of the helium auxiliary system is used to separate the moisture in the gas-water separator, and the membrane compressor is used to drive the helium in the regeneration loop.

[0047] In the hot test, it is necessary to check the inlet and outlet temperatures of the purification equipment, so it is necessary to ensure the normal operation of the thermal instruments.

[0048] In the embodiments of the first aspect of the present invention, the test technical indicators include cold test indicators and hot test indicators;

[0049] The cold test indicators include: in the helium purification system, the regeneration loops composed of the copper oxide bed, the molecular sieve bed, the cryogenic activated carbon bed, and the cryogenic helium / helium heat exchanger connected to the helium purification and regeneration system operate smoothly, and the instrument display parameters are normal; the drainage function of the gas-water separator of the helium purification and regeneration system to the drainage equipment of the helium auxiliary system meets the design requirements;

[0050] The hot test indicators include: during the regeneration operation of the helium purification system, the inlet temperature of the copper oxide bed of the helium purification system is between 70°C and 100°C; the average inlet and outlet temperature of the molecular sieve bed of the helium purification system is greater than 200°C; the average inlet and outlet temperature of the activated carbon bed of the helium purification system is greater than 150°C; when assisting the regeneration of the molecular sieve bed, the outlet temperature of the electric heater of the helium purification and regeneration system is greater than 250°C; the outlet temperature of the water-helium cooler of the helium purification system is less than 15°C.

[0051] In the embodiment of the first aspect of the present invention, during the cold test, water is injected into the gas-water separator of the helium purification and regeneration system through a temporary test device to verify the drainage function of the gas-water separator.

[0052] In the embodiment of the first aspect of the present invention, during the hot test, the copper oxide bed of the helium purification system is placed in the regeneration state, and the helium flow rate parameter in the regeneration loop is controlled to reach 25 kg / h; the inlet temperature of the copper oxide bed of the helium purification system is controlled to be 80 °C, and oxygen is injected into the inlet of the copper oxide bed.

[0053] During the hot test, the molecular sieve bed of the helium purification system is placed in the regeneration state, the helium flow rate parameter in the regeneration loop is controlled to reach 50 kg / h, and the temperature of the molecular sieve bed reaches 250 °C.

[0054] During the hot test, the low-temperature adsorber of the helium purification system is placed in the regeneration state, and the heating and purging operation of the low-temperature helium / helium heat exchanger is controlled. The helium flow rate parameter in the regeneration loop is 25 kg / h, and the temperatures of the low-temperature adsorber and the low-temperature helium / helium heat exchanger reach 150 °C.

[0055] During the hot test, the auxiliary molecular sieve bed of the helium purification system is placed in the regeneration state, the helium flow rate parameter in the regeneration loop is controlled to be 50 kg / h, and the regeneration temperature of the auxiliary molecular sieve bed reaches 250 °C.

[0056] In the second aspect, referring to Figure 1 As shown, the present invention further provides a helium purification and regeneration system, which is applied to the coolant purification and regeneration process of a high-temperature gas-cooled reactor nuclear power plant, including: a heat exchanger 1, a first gas-water separator 2, a first molecular sieve bed 3, a membrane compressor unit 4, and a first electric heater 5, which are sequentially connected and arranged along the helium flow direction; the front end of the heat exchanger 1 can be communicated with the rear end of the purification equipment of the helium purification system; the rear end of the first electric heater 5 is communicated with the outlet end of the purification equipment of the helium purification system, so that the helium purification and regeneration system and the helium purification system form a regeneration loop; a first valve body 7 is provided between the heat exchanger 1 and the purification equipment of the helium purification system; a second valve body 8 is provided between the first electric heater 5 and the purification equipment of the helium purification system; a return pipeline, one end of the return pipeline is communicated with the front end of the heat exchanger 1 and is located between the heat exchanger 1 and the first valve body 7, the other end of the return pipeline is communicated with the inlet end of the purification equipment of the helium purification system and is located between the second valve body 8 and the purification equipment of the helium purification system, and a third valve body 9 is provided on the return pipeline.

[0057] Specifically, when the switching valve places the purification equipment related to the helium purification system in the regeneration circuit, helium flows out from the outlet of the purification equipment of the helium purification system, enters the heat exchanger 1 through the first valve body 7, conducts heat exchange, then conducts steam-water separation in the first steam-water separator 2, adsorbs carbon dioxide and water in the molecular sieve, and after being heated by the first electric heater 5, re-enters the relevant purification equipment in the helium purification system through the second valve body 8. The helium is divided into two streams after the second valve body 8. The setting of the return pipeline is mainly used to regenerate the molecular sieve bed of the helium purification regeneration system. The helium conducts heat exchange through the heat exchanger 1, then conducts steam-water separation in the first steam-water separator 2, desorbs carbon dioxide and water in the molecular sieve, and after being heated by the first electric heater 5, returns to the front of the heat exchanger through the second valve 8 and the third valve 9 to form a cycle, regenerating the regenerated molecular sieve bed in the helium purification regeneration system, so as to ensure that the helium quality meets the requirements.

[0058] In the second aspect embodiment of the present invention, the membrane press unit 4 includes a first membrane press and a second membrane press arranged in parallel. A first inlet valve and a first outlet valve are respectively arranged at the front and rear ends of the first membrane press; a second inlet valve and a second outlet valve are respectively arranged at the front and rear ends of the second membrane press.

[0059] It can be understood that by setting multiple groups of membrane presses, it is convenient to regulate the flow rate of helium. In addition, the setting of multiple groups of membrane presses can improve the reliability and stability of the helium purification regeneration system. A first inlet valve and a first outlet valve are respectively arranged at the front and rear ends of the first membrane press, and a second inlet valve and a second outlet valve are respectively arranged at the front and rear ends of the second membrane press. When the first membrane press fails, by closing the first inlet valve and the first outlet valve, the second membrane press can operate normally to maintain and replace the first membrane press, so as to ensure the normal operation of the system and reduce the maintenance cost. Similarly, when the second membrane press fails, the second inlet valve and the second outlet valve can be closed.

[0060] The first inlet valve, the first outlet valve, the second inlet valve, and the second outlet valve are all electric globe valves.

[0061] In the second aspect embodiment of the present invention, a plurality of inlets are provided at the front end of the first valve body 7, and a plurality of outlets are provided at the rear end of the second valve body 8 to be adapted to connect to a plurality of purification equipment of the helium purification system to form a plurality of regeneration circuits.

[0062] Specifically, by setting multiple circuits and cooperating with the circuit pipelines of the helium purification regeneration system, the synchronous operation of the separate regeneration or purification of a plurality of purification equipment of the helium purification system is realized, thereby improving the purification efficiency of helium and ensuring the uninterrupted operation of the system.

[0063] In the second aspect embodiment of the present invention, a second electric heater 6 is further provided between the third valve body 9 and the electric heater of the helium purification system.

[0064] Specifically, when the helium purification system is in the purification state, in order to ensure that the temperature of helium reaches the operating standard, a second electric heater 6 is added between the second valve body 8 and the electric heater of the helium purification system to improve the heating speed.

[0065] In the second aspect embodiment of the present invention, the first valve body 7, the second valve body 8 and the third valve body 9 are all electric valves.

[0066] Specifically, by adopting the setting of electric valves, the degree of automation is improved.

[0067] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for debugging a helium purification and regeneration system, characterized in that: The following steps are involved: Connecting the helium purification and regeneration system to the helium purification system, and setting test prerequisites for the helium purification and regeneration system and the helium purification system; Checking the test technical indicators of the helium purification and regeneration system and the helium purification system to determine that the helium purification and regeneration system and the helium purification system meet the test conditions; Conduct a cold test, the helium purification regeneration system forms a regeneration loop for the copper oxide bed, molecular sieve bed, low-temperature activated carbon bed, and low-temperature helium / helium heat exchanger of the helium purification system by switching valves, starts the diaphragm compressor for cyclic operation, and checks the operating parameters; A hot test is carried out, the electric heater of the helium purification and regeneration system is debugged, the helium purification system and the helium purification and regeneration system are vacuumized, and helium is supplemented to 0.6MPa, and separate heating circuits for the copper oxide bed, molecular sieve bed, cryogenic adsorber, and cryogenic helium / helium heat exchanger are formed by switching valves, and the membrane press and the electric heater of the helium purification and regeneration system are started in sequence, and the copper oxide bed, molecular sieve bed, cryogenic adsorber and cryogenic helium / helium heat exchanger of the helium purification system are regenerated respectively, and the operating pressure parameters, flow parameters, outlet temperature of the electric heater, inlet and outlet temperatures of the purification equipment, and liquid level parameters of the gas-water separator are adjusted.

2. The debugging method of the helium purification and regeneration system according to claim 1, characterized in that: The test preconditions include cold test preconditions and hot test preconditions; The cold test prerequisites include: the cooling water supply system and vacuum system are complete; the helium supply and storage system and the drainage equipment of the helium auxiliary system are complete; the membrane press unit test and valve test of the helium purification and regeneration system are completed; The hot test prerequisites include: the thermal instruments of the helium purification system and the helium purification and regeneration system are complete; the exhaust equipment of the helium auxiliary system is complete; the gas sampling and analysis system is complete; and the loop of the helium purification and regeneration system is in a helium environment.

3. The debugging method of the helium purification and regeneration system according to claim 1, characterized in that: The test technical indicators include cold test indicators and hot test indicators; The cold test indicators include: in the helium purification system, the copper oxide bed, the molecular sieve bed, the low-temperature activated carbon bed, the low-temperature helium / helium heat exchanger and the helium purification regeneration system are connected to form a regeneration circuit that operates smoothly, and the instrument display parameters are normal; the drainage function of the gas-water separator of the helium purification regeneration system to the drainage equipment of the helium auxiliary system meets the design requirements; The hot test indicators include: when the purification equipment of the helium purification system is in the regeneration operation process, the inlet temperature of the copper oxide bed of the helium purification system is 70°C-100°C; the average inlet and outlet temperatures of the molecular sieve bed of the helium purification system is greater than 200°C; the average inlet and outlet temperatures of the activated carbon bed of the helium purification system is greater than 150°C; when the auxiliary molecular sieve bed is regenerated, the outlet temperature of the electric heater of the helium purification system is greater than 250°C; the outlet temperature of the water-helium cooler of the helium purification system is less than 15°C.

4. The debugging method of the helium purification and regeneration system according to claim 1, characterized in that: In the cold test, water is injected into the gas-water separator of the helium purification system through a temporary test device to verify the drainage function of the gas-water separator.

5. The debugging method of the helium purification and regeneration system according to any one of claims 1 to 4, characterized in that: In the hot test, the copper oxide bed of the helium purification system is placed in a regeneration state, and the helium flow parameter in the regeneration loop is controlled to reach 25 kg / h; the inlet temperature of the copper oxide bed of the helium purification system is controlled to be 80° C., and oxygen is injected into the inlet of the copper oxide bed; In the hot test, the molecular sieve bed of the helium purification system is placed in a regeneration state, the helium flow parameter in the regeneration loop is controlled to reach 50 kg / h, and the temperature of the molecular sieve bed reaches 250° C.; In the hot test, the cryogenic adsorber of the helium purification system is placed in a regeneration state, and the cryogenic helium / helium heat exchanger is controlled to heat and purge, the helium flow parameter in the regeneration loop is 25 kg / h, and the temperature of the cryogenic adsorber and the cryogenic helium / helium heat exchanger reaches 150° C.; In the hot test, the auxiliary molecular sieve bed of the helium purification system was placed in a regeneration state, the helium flow parameter in the regeneration loop was controlled to be 50 kg / h, and the regeneration temperature of the auxiliary molecular sieve bed reached 250°C.

6. A helium purification and regeneration system, applied to the coolant purification and regeneration process of a high temperature gas-cooled reactor nuclear power plant, characterized in that: include: A heat exchanger (1), a first gas-water separator (2), a first molecular sieve bed (3), a membrane compressor unit (4) and a first electric heater (5) are sequentially connected along the flow direction of the helium; The front end of the heat exchanger (1) is connected to the outlet end of the purification equipment of the helium purification system; the rear end of the first electric heater (5) is connected to the inlet end of the purification equipment of the helium purification system, so that the helium purification regeneration system and the purification equipment of the helium purification system form a regeneration loop; A first valve body (7) is provided between the heat exchanger (1) and the outlet end of the purification device; a second valve body (8) is provided between the first electric heater (5) and the inlet end of the helium purification system; A reflux pipe, one end of which is in communication with the front end of the heat exchanger (1) and is located between the heat exchanger (1) and the first valve body (7), the other end of which is in communication with the inlet end of the purification device of the helium purification system and is located between the second valve body (8) and the electric heater of the helium purification system, and a third valve body (9) is provided on the reflux pipe.

7. The helium purification and regeneration system according to claim 6, characterized in that: The membrane press group (4) comprises a first membrane press and a second membrane press arranged in parallel, wherein the first membrane press is provided with a first inlet valve and a first outlet valve at the front and rear ends respectively; and the second membrane press is provided with a second inlet valve and a second outlet valve at the front and rear ends respectively.

8. The helium purification and regeneration system according to claim 7, characterized in that: The front end of the first valve body (7) is provided with a plurality of inlets, and the rear end of the second valve body (8) is provided with a plurality of outlets, so as to be suitable for connecting a plurality of purification devices of the helium purification system to form a plurality of circuits.

9. The helium purification and regeneration system according to claim 6, characterized in that: A second electric heater (6) is also provided between the second valve body (8) and the purification equipment of the helium purification system.

10. The helium purification and regeneration system according to claim 6, characterized in that: The first valve body (7), the second valve body (8) and the third valve body (9) are all electric valves.

Images