Automatic air supplement method and device for in-situ leaching uranium gas station

Abstract

The application discloses an automatic air supplement method and device for an in-situ leaching uranium gas station and belongs to the technical field of in-situ leaching uranium. The automatic air supplement method comprises the following steps: according to the pressure of a gaseous gas sample storage tank and the injection pressure, automatically controlling the air supplement process of the gaseous gas sample storage tank, so that the pressure of the gaseous gas sample storage tank is greater than the injection pressure; and according to the injection pressure and the liquid injection pressure, automatically controlling the injection process, so that the injection pressure is greater than the liquid injection pressure. Through real-time detection of the pressure of each part of the in-situ leaching uranium gas station, the embodiment of the application realizes automatic and accurate regulation and control of the carbon dioxide system of the in-situ leaching uranium gas station, improves the efficiency and saves manpower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of in-situ leaching of uranium, in particular to an automatic gas supplementing method and device for a gas station of in-situ leaching of uranium. BACKGROUND

[0002] In-situ leaching of uranium, referred to as in-situ leaching of uranium, is a kind of mining and smelting integrated process, which realizes leaching and extraction of sandstone uranium ore under natural buried conditions by using chemical solution through drilling engineering. The process needs to inject leaching solution from the injection well into the underground, seep along the ore bed to leach the uranium in the ore, form leaching solution, and then lift it to the ground surface from the pumping well, and then the metal uranium in the leaching solution can be recovered after water and smelting treatment. According to the different types of leaching agent, it can be divided into acid leaching, alkali leaching and neutral leaching. Among them, the neutral leaching process has a mild environment and is suitable for the leaching of high-carbonate sandstone uranium ore, and oxygen and carbon dioxide are added to the tail liquid to prepare the leaching solution.

[0003] Carbon dioxide is a polar gas and is easily soluble in water. In the neutral leaching process, the role of carbon dioxide mainly reflects two aspects: one is to dissolve in the tail liquid together with oxygen to prepare the leaching solution, and enter the stratum to generate bicarbonate and hexavalent uranium ion complex, and the uranium ion can only be leached and pumped to the ground surface after being complexed with bicarbonate; the second is to prevent the resin bed in the adsorption tower from being cemented, and carbon dioxide needs to be introduced into the adsorption tower to adjust the pH value of the solution in the tower when the leaching solution is pumped to the ground surface for adsorption. It can be seen that carbon dioxide is crucial in the neutral leaching process.

[0004] The in-situ leaching of uranium mine converts liquid carbon dioxide into gaseous carbon dioxide in the gas station and realizes the addition of gas. In order to successfully add carbon dioxide, it is necessary to ensure that the injection pressure is greater than the injection pressure, and the injection pressure is not a constant value, so on the one hand, the injection pressure of carbon dioxide needs to be closely monitored, and on the other hand, the self-pressure of the carbon dioxide gas tank also needs to be monitored. Once the pressure is low, the tail liquid of the injection system is easy to enter the gas system, causing safety hazards. At the same time, when the self-pressure of the carbon dioxide gas tank is lower than the injection pressure, the operation of converting liquid to gas needs to be completed. The frequency of the above operation in the gas station of the in-situ leaching mine is very high every day, but these works are currently completed by manual operation, which has low automation degree, large labor consumption and high cost.

[0005] In the neutral leaching process, the role of oxygen is to oxidize the uranium in the underground uranium ore layer from tetravalent uranium to hexavalent uranium. At present, all neutral leaching uranium mines are equipped with gas stations (generally containing liquid oxygen storage tanks, cryogenic pumps, vaporizers, oxygen storage tanks and their supporting pipe fittings), which vaporize liquid oxygen into oxygen and then into the liquid injection system. In order to make the oxygen flow smoothly, the oxygen injection pressure must be greater than the liquid injection pressure, and the liquid injection pressure is not a constant value, so on the one hand, the oxygen injection pressure must be closely monitored, and on the other hand, the oxygen tank pressure must also be closely monitored. Once the oxygen injection pressure is low, the tail liquid of the liquid injection system is easy to enter the gas system, causing safety hazards. At the same time, when the oxygen tank pressure is lower than the liquid injection pressure, the operation of converting liquid oxygen to gaseous oxygen needs to be completed. The frequency of the above operation in the gas station of the in-situ leaching mine is very high every day, but these operations are currently completed manually, with low automation, high labor consumption and high cost. SUMMARY

[0006] The purpose of the present application is to provide an automatic gas supplement method and device for an in-situ leaching uranium gas station, so as to realize automatic and accurate control of the gas supplement system of the in-situ leaching uranium gas station, improve efficiency and save manpower.

[0007] To achieve the above purpose, the present application provides the following scheme:

[0008] The present application provides an automatic gas supplement method for an in-situ leaching uranium gas station, which comprises the following steps:

[0009] According to the gaseous gas sample tank pressure and the gas injection pressure, the automatic control of the gaseous gas sample tank supplement process is carried out, so that the gaseous gas sample tank pressure is greater than the gas injection pressure; the gaseous gas sample tank pressure is the pressure of the gaseous gas sample tank of the gas supplement system of the in-situ leaching uranium gas station, and the gas injection pressure is the pressure of the gas sample output to the liquid injection system of the in-situ leaching uranium gas station by the gas supplement system;

[0010] According to the gas injection pressure and the liquid injection pressure, the automatic control of the gas injection process is carried out, so that the gas injection pressure is greater than the liquid injection pressure; the liquid injection pressure is the pressure of the liquid injection system;

[0011] The gas sample is carbon dioxide or oxygen, and the gas supplement system is a carbon dioxide system or an oxygen system.

[0012] Optionally, when the gas sample is carbon dioxide, the automatic control of the gaseous gas sample tank supplement process according to the gaseous gas sample tank pressure and the gas injection pressure, so that the gaseous gas sample tank pressure is greater than the gas injection pressure, specifically comprises:

[0013] When it is detected that the gaseous gas sample tank pressure and the gas injection pressure meet the supplement condition, the following operations are performed:

[0014] opening the outlet valve of the liquid gas sample storage tank and the outlet valve of the vaporizer of the gas supplement system, and detecting the pressure of the gaseous gas sample storage tank in real time; and when it is detected that the pressure of the gaseous gas sample storage tank is not less than the rated pressure of the gaseous gas sample storage tank, closing the outlet valve of the liquid gas sample storage tank of the gas supplement system.

[0015] Optionally, after opening the outlet valve of the liquid gas sample storage tank and the outlet valve of the vaporizer of the gas supplement system, the method further comprises the following steps:

[0016] detecting the outlet temperature of the vaporizer;

[0017] when it is detected that the outlet temperature of the vaporizer is less than the minimum temperature threshold, closing the outlet valve of the vaporizer, and opening the inlet valve of the heater, the outlet valve of the heater and the heater.

[0018] Optionally, when the gas sample is oxygen, the automatic control of the gas supplement process of the gaseous gas sample storage tank according to the pressure of the gaseous gas sample storage tank and the gas injection pressure, so that the pressure of the gaseous gas sample storage tank is greater than the gas injection pressure, specifically comprises:

[0019] when it is detected that the pressure of the gaseous gas sample storage tank and the gas injection pressure meet the gas supplement condition, the following operations are performed:

[0020] opening the outlet valve of the liquid gas sample storage tank, the low-temperature liquid pump loop valve and the bypass valve on the low-temperature liquid pump loop of the gas supplement system;

[0021] After 30 seconds, the bypass valve on the low-temperature liquid pump loop and the low-temperature liquid pump loop valve are closed in turn, and the low-temperature liquid pump is started, and the rotating speed of the low-temperature liquid pump is adjusted to a preset rotating speed;

[0022] when the increasing speed of the pressure of the gaseous gas sample storage tank during the gas supplement process is less than an increasing speed threshold, the rotating speed of the low-temperature liquid pump is increased;

[0023] when the pressure of the gaseous gas sample storage tank reaches the rated pressure of the gaseous gas sample storage tank, the outlet valve of the liquid gas sample storage tank is closed, and after 2 minutes, the low-temperature liquid pump is closed.

[0024] Optionally, the gas supplement condition is:

[0025] (P3-P2) / P2≤0.1;

[0026] wherein, P3 is the pressure of the gaseous gas sample storage tank, and P2 is the gas injection pressure.

[0027] Optionally, the automatic control of the gas injection process according to the gas injection pressure and the liquid injection pressure, so that the gas injection pressure is greater than the liquid injection pressure, specifically comprises:

[0028] when it is detected that the gas injection pressure and the liquid injection pressure meet the gas injection adjustment condition, the following operations are performed:

[0029] Continuously increase the opening of the pressure reducing valve of the gas supplement system, and detect the injection gas pressure in real time, and stop increasing the opening of the pressure reducing valve when the injection gas pressure is detected to be not less than the injection gas pressure threshold.

[0030] Optionally, according to the gaseous gas sample tank pressure and the injection gas pressure, the automatic control of the gas supplement process of the gaseous gas sample tank is performed, so that the gaseous gas sample tank pressure is greater than the injection gas pressure, and then the method further comprises:

[0031] Detecting the liquid level of the liquid gas sample tank of the gas supplement system;

[0032] When the liquid level is less than the minimum liquid level threshold, generating an alarm signal of insufficient liquid gas sample.

[0033] An automatic gas supplement device of an in-situ leaching uranium gas station, the automatic gas supplement device comprising a sensor assembly, a controller and a computer;

[0034] The sensor assembly is arranged in the gas supplement system and the liquid injection system of the in-situ leaching uranium gas station, and the sensor assembly is connected with the controller; the sensor assembly is used for detecting the gaseous gas sample tank pressure, the injection gas pressure and the liquid injection pressure;

[0035] The controller is connected with the computer, and the controller is further connected with the control end of the gas supplement system; the computer is used for controlling the controller to control the gas supplement system of the in-situ leaching uranium gas station by using the automatic gas supplement method described above;

[0036] The gas supplement system is a carbon dioxide system or an oxygen system.

[0037] Optionally, the sensor assembly comprises a first pressure gauge, a second pressure gauge and a third pressure gauge.

[0038] The first pressure gauge is arranged in the liquid injection system, the second pressure gauge is arranged at the outlet of the injection gas valve of the gas supplement system, and the third pressure gauge is arranged at the outlet of the gaseous gas sample tank.

[0039] The controller is connected with the control end of the liquid gas sample tank outlet valve, the control end of the vaporizer outlet valve, the control end of the gaseous gas sample tank outlet valve, the control end of the pressure reducing valve and the control end of the injection gas valve of the carbon dioxide system, respectively.

[0040] Optionally, when the gas supplement system is a carbon dioxide system, the sensor assembly further comprises a thermometer and a liquid level gauge; the thermometer is arranged at the outlet of the vaporizer outlet valve of the carbon dioxide system, and the liquid level gauge is arranged in the liquid gas sample tank of the gas supplement system; the controller is further connected with the control end of the heater inlet valve, the control end of the heater and the control end of the heater outlet valve of the gas supplement system, respectively.

[0041] When the gas supplement system is an oxygen system, the sensor assembly further comprises a liquid level meter arranged in a liquid gas sample storage tank of the gas supplement system

[0042] According to the specific embodiments of the present application, the following technical effects are disclosed:

[0043] The automatic gas supplement method and device for the in-situ leaching uranium gas station provided by the embodiments of the present application, the automatic gas supplement method comprises the following steps: automatically controlling the gas supplement process of the gaseous gas sample storage tank according to the pressure of the gaseous gas sample storage tank and the gas injection pressure, so that the pressure of the gaseous gas sample storage tank is greater than the gas injection pressure; automatically controlling the gas injection process according to the gas injection pressure and the liquid injection pressure, so that the gas injection pressure is greater than the liquid injection pressure. The embodiments of the present application realize the automatic and accurate regulation and control of the gas supplement system of the in-situ leaching uranium gas station by detecting the pressure of each part of the in-situ leaching uranium gas station in real time, thereby improving the efficiency and saving manpower. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0045] Figure 1 The structure diagram of the carbon dioxide system provided by the embodiments of the present application is shown in the figure.

[0046] Figure 2 The structure diagram of the oxygen system provided by the embodiments of the present application is shown in the figure.

[0047] Explanation of reference signs:

[0048] 1-liquid gas sample storage tank, 2-liquid level meter, 3-liquid gas sample storage tank outlet valve, 4-carburetor, 5-carburetor outlet valve, 6-heater inlet valve, 7-heater, 8-heater outlet valve, 9-thermometer, 10-gaseous gas sample storage tank, 11-third pressure gauge, 12-gaseous gas sample storage tank outlet valve, 13-pressure reducing valve, 14-gas injection valve, 15-second pressure gauge, 16-adsorption tower inlet valve, 17-leaching liquid, 18-adsorption tower, 19-liquid injection main pipe, 20-first pressure gauge, 21-well site, 22-data acquisition line, 23-computer, 24-controller, 25-data transmission line, 26-liquid gas sample storage tank loop bypass valve, 27-liquid gas sample storage tank loop valve, 28-low-temperature liquid pump. DETAILED DESCRIPTION

[0049] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0050] The present application aims to provide an automatic air supplement method and device for an in-situ leaching uranium gas station, so as to realize automatic and accurate regulation and control of the air supplement system of the in-situ leaching uranium gas station, improve efficiency, and save manpower.

[0051] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] Embodiment 1

[0053] Embodiment 1 of the present application provides an automatic air supplement method for an in-situ leaching uranium gas station. The automatic air supplement method provided in Embodiment 1 of the present application is used to automatically control the air supplement system of the in-situ leaching uranium gas station.

[0054] The air supplement system is a carbon dioxide system or an oxygen system.

[0055] The specific structure of the carbon dioxide system is shown in Figure 1 The specific structure of the carbon dioxide system is shown in

[0056] The liquid gas sample storage tank 1 is connected with the vaporizer 4 through a pipeline; the outlet of the vaporizer 4 is connected with the thermometer 9, and is divided into two paths, one of which is connected with the heater 7, and the other of which is connected with the gaseous gas sample storage tank 10.

[0057] The gaseous gas sample storage tank 10 is sequentially connected with the third pressure gauge 11, the gaseous gas sample storage tank outlet valve 12, the pressure reducing valve 13, the gas injection valve 14, and the second pressure gauge 15 through a pipeline in sequence. The carbon dioxide system is connected with the liquid injection main pipe 19 and the adsorption tower 18 of the liquid injection system through a pipeline. A one-way valve is installed on all the pipelines of the carbon dioxide system.

[0058] The specific structure of the carbon dioxide system is shown in Figure 2As shown, the oxygen system comprises: a liquid gas sample storage tank 1, a liquid level meter 2, a liquid gas sample storage tank outlet valve 3, a liquid gas sample storage tank circuit bypass valve 26, a liquid gas sample storage tank circuit valve 27, a low-temperature liquid pump 28, a vaporizer 4, a gaseous gas sample storage tank 10, a first pressure gauge 20, a second pressure gauge 15, a third pressure gauge 11, a gaseous gas sample storage tank outlet valve 12, a pressure reducing valve 13, a gas injection valve 14, a liquid injection main pipe 19, a data acquisition line 22, a computer 23, a data transmission line 25, a controller 24, etc.

[0059] The liquid gas sample storage tank 1 is connected with the low-temperature liquid pump 28 through a pipeline.

[0060] The low-temperature liquid pump 28 comprises an inlet and two outlets, one of which is used for returning to the liquid gas sample storage tank 1, and the other is connected with the vaporizer 4.

[0061] The vaporizer 4 is connected with the gaseous gas sample storage tank 10, and the gaseous gas sample storage tank 10 is sequentially connected with the third pressure gauge 11, the gaseous gas sample storage tank outlet valve 12, the pressure reducing valve 13, the gas injection valve 14, and the second pressure gauge 15 through pipelines.

[0062] A one-way valve is installed on the pipeline.

[0063] The measurement data of all pressure gauges of the oxygen system are read in real time, transmitted to the computer 24 through the data acquisition line 22, and the pressure reducing valve and the regulating valve are additionally provided with the controller 25.

[0064] Based on the above structure, the automatic gas supplementing method provided by the embodiment 1 of the present application comprises the following steps:

[0065] According to the gaseous gas sample storage tank pressure and the gas injection pressure, the automatic control of the gas supplementing process of the gaseous gas sample storage tank is performed, so that the gaseous gas sample storage tank pressure is greater than the gas injection pressure; the gaseous gas sample storage tank pressure is the pressure of the gaseous gas sample storage tank of the gas supplementing system of the in-situ leaching uranium gas station, and the gas injection pressure is the pressure of the gas sample output to the liquid injection system of the in-situ leaching uranium gas station.

[0066] According to the gas injection pressure and the liquid injection pressure, the automatic control of the gas injection process is performed, so that the gas injection pressure is greater than the liquid injection pressure; the liquid injection pressure is the pressure of the liquid injection system.

[0067] The gas sample is carbon dioxide or oxygen, and the gas supplementing system is a carbon dioxide system or an oxygen system. For example, when the gas sample is carbon dioxide, the specific implementation process of the automatic gas supplementing method provided by the embodiment of the present application is as follows:

[0068] Step one, open the liquid gas sample storage tank outlet valve 3, first fill the carbon dioxide gas storage tank 10, the volume is determined according to the rated pressure of gaseous gas sample storage tank (that is, the gaseous gas sample storage tank pressure reaches the rated pressure of gaseous gas sample storage tank, it is considered to be full); And open the gaseous gas sample storage tank 10 subsequent pipeline on the gaseous gas sample storage tank outlet valve 12, pressure reducing valve 13, gas injection valve 14, start to inject liquid system and adsorption tower 18 into the gas.

[0069] Step two, read the injection liquid system injection pressure P1 (injection liquid system pressure is greater than the adsorption tower pressure), adjust the pressure reducing valve 13 on the gaseous gas sample storage tank 10 subsequent pipeline, ensure that the gas injection pressure P2 is greater than the injection liquid pressure P1; At this time, the carbon dioxide system can be stable operation; At the same time, P3≥P2.

[0070] Step three, with the consumption of carbon dioxide gas, the gaseous gas sample storage tank pressure P3 will decrease, when lower than P2, carbon dioxide will not be added to the injection liquid system, at this time, the gaseous gas sample storage tank 10 needs to be recharged; In addition, the injection liquid pressure P1 of the injection liquid system will change with the leaching process, the value will generally increase (such as due to the blockage of the ore layer), therefore, in order to ensure the normal addition of carbon dioxide, it is necessary to ensure that the gas injection pressure P2 is always greater than the injection liquid pressure P1, this process is mainly realized by adjusting the pressure reducing valve 13 on the gaseous gas sample storage tank 10 subsequent pipeline.

[0071] Exemplary, the specific implementation process to ensure P3≥P2 is:

[0072] (1) Close the heater inlet valve 6 and the heater outlet valve 8. When it is detected that the gaseous gas sample storage tank pressure P3 is close to the gas injection pressure P2 (for safety, when (P3-P2) / P2≤0.1), open the liquid gas sample storage tank outlet valve 3 and the vaporizer outlet valve 5 in turn.

[0073] (2) When the gaseous gas sample storage tank pressure P3 reaches the rated pressure of gaseous gas sample storage tank, close the liquid oxygen storage tank outlet valve 3, the gas charging process is completed.

[0074] (3) The temperature of the liquid gas sample storage tank 1 is generally -20℃, and the vaporizer 4 is vaporized by the pressure release of the liquid gas sample storage tank 1 to the gaseous gas sample storage tank 10 and the ambient temperature transfer, and the pressure of the carbon dioxide in the pipeline during the vaporization process is maintained at 2-3 MPa, and in this pressure range, the highest critical temperature of the carbon dioxide is -6℃. In order to ensure that the carbon dioxide is completely vaporized, when it is detected that the temperature of the pipeline is lower than -6℃, the temperature of the heater 7 is set to 60℃, and the heater inlet valve 6, the heater outlet valve 8 are opened, and the vaporizer outlet valve 5 is closed, and the gaseous gas after being vaporized is re-entered into the gaseous gas sample storage tank 10. Similarly, when the pressure P3 of the gaseous gas sample storage tank reaches the rated pressure of the gaseous gas sample storage tank, the liquid gas sample storage tank outlet valve 3 is closed, the heater 7 and the heater inlet valve 6 and the heater outlet valve 8 are closed, and the vaporizer outlet valve 5 is opened, and the gas supplementing process is completed.

[0075] For example, the specific process of ensuring that the gas injection pressure P2 is always greater than the liquid injection pressure P1 is as follows:

[0076] (1) When it is detected that the gas injection pressure P2 approaches the liquid injection pressure P1, the opening degree of the pressure reducing valve 13 is slowly increased, so that the flow through the pressure reducing valve 13 is increased. For example, the approach condition is determined as follows: (P2-P1) / P1 is less than or equal to 0.1.

[0077] (2) When it is detected that the gas injection pressure P2 reaches a preset value (i.e. a gas injection pressure threshold), the adjustment of the pressure reducing valve 13 is stopped, and at this time, the system can be stably operated.

[0078] When the liquid level fed back by the liquid level meter 2 is lower than a set value (i.e. a minimum liquid level threshold), an alarm signal is displayed on the computer side, and the operator will contact the liquid carbon dioxide manufacturer for filling.

[0079] For example, when the gas sample is oxygen, the specific implementation process of the automatic gas supplementing method provided by the embodiment of the present application is as follows:

[0080] Step one, open the liquid gas sample storage tank and the low-temperature liquid pump, first fill the gaseous gas sample storage tank with oxygen, and the volume of the oxygen is determined according to the rated pressure of the gaseous gas sample storage tank; and open all the valves on the subsequent pipeline of the gaseous gas sample storage tank, and start to pass oxygen to the liquid injection system.

[0081] Step two, read the liquid injection pressure P1 of the liquid injection system, adjust the pressure reducing valve on the subsequent pipeline of the gaseous gas sample storage tank, and ensure that the gas injection pressure P2 is greater than the liquid injection pressure P1; at this time, the oxygen system can be stably operated; at the same time, P3≥P2.

[0082] Step 3, first case, as the oxygen is consumed, the pressure P3 of the gaseous gas sample storage tank will decrease, when lower than P2, the oxygen will not be added to the liquid injection system, at this time, the oxygen storage tank 8 needs to be refilled; second case, the pressure P2 of the liquid injection system will change during the leaching process, the value will generally increase (such as due to the blockage of the ore bed), therefore, in order to ensure the normal addition of oxygen, it is necessary to ensure that the liquid injection pressure P2 is greater than the liquid injection pressure P1, this process is mainly realized by adjusting the pressure reducing valve in the subsequent pipeline of the gaseous gas sample storage tank. It should be pointed out that compared with the first case, the adjustment frequency of the second case is low.

[0083] For example, the process of refilling the gaseous gas sample storage tank is realized as follows:

[0084] When it is detected that the pressure value P3 approaches P2 (for safety, the threshold is set to (P3-P2) / P2=0.1, that is, when lower than 0.1, the following operation is performed), the liquid gas sample storage tank outlet valve, the low-temperature liquid pump circuit valve and the bypass valve in the low-temperature liquid pump circuit are opened in turn.

[0085] After 30 seconds, the bypass valve in the low-temperature liquid pump circuit and the low-temperature liquid pump circuit valve 5 are closed in turn, and the low-temperature liquid pump is started, and the speed of the low-temperature liquid pump is adjusted to a suitable value.

[0086] Since the gaseous gas sample storage tank is refilled, the oxygen is still normally added to the liquid injection system, that is, the oxygen is always consumed. Therefore, when it is found that the P3 value grows slowly during the refilling process, or is still close to P2, the speed of the low-temperature liquid pump is increased.

[0087] When the P3 value reaches the rated pressure of the oxygen storage tank, the liquid oxygen storage tank outlet valve is closed; after 2 minutes (so that the liquid oxygen in the liquid gas sample storage tank outlet valve to the low-temperature liquid pump is vaporized), the low-temperature liquid pump is closed, and the refilling process is completed.

[0088] For example, the process of adjusting the pressure reducing valve is realized as follows:

[0089] When it is detected that the pressure value P2 approaches P1, the opening degree of the pressure reducing valve is slowly increased, so that the flow through the pressure reducing valve is increased.

[0090] When it is detected that the pressure value P2 reaches the preset value, the adjustment of the pressure reducing valve is stopped, and the system can be stably operated at this time.

[0091] For example, when the data fed back by the liquid level meter of the liquid oxygen storage tank is lower than the set value, an alarm signal is displayed on the computer end, and the operator will contact the liquid oxygen manufacturer to perform liquid oxygen filling.

[0092] Example 2

[0093] The embodiment 2 of the present application provides a kind of automatic carbon dioxide gas supplement device of in-situ leaching uranium gas station, including sensor assembly, controller 24 and computer 23;The sensor assembly is arranged in the carbon dioxide system and liquid injection system of in-situ leaching uranium gas station, the sensor assembly is connected with the controller 24;The sensor assembly is used to detect gaseous gas sample storage tank pressure, injection pressure and liquid injection pressure;The controller 24 is connected with the computer 23, and the controller 24 is also connected with the control end of the carbon dioxide system, and the computer 23 is used to control the controller to realize the control of the carbon dioxide system of in-situ leaching uranium gas station by using the above-mentioned automatic gas supplement method.

[0094] The embodiment 2 of the present application reads the measured data of the sensor assembly (all pressure gauges and thermometers) arranged in the carbon dioxide system in real time, and adds a controller 24 to realize automatic control.

[0095] Specifically, as shown in the figure Figure 1 The sensor assembly includes a first pressure gauge 20, a second pressure gauge 15 and a third pressure gauge 11;The first pressure 20 table is arranged in the liquid injection system, the second pressure table 15 is arranged at the outlet of the steam injection valve of the carbon dioxide system, and the third pressure table 11 is arranged at the outlet of the gaseous gas sample storage tank;The controller 24 is connected with the control end of the liquid gas sample storage tank outlet valve 3 of the carbon dioxide system, the control end of the vaporizer outlet valve 5, the control end of the gaseous gas sample storage tank outlet valve 12, the control end of the pressure reducing valve 13 and the control end of the gas injection valve 14 respectively.

[0096] For example, when the gas sample is carbon dioxide, the sensor assembly further includes a thermometer 9 and a liquid level gauge 2;The thermometer 9 is arranged at the outlet of the vaporizer outlet valve 5 of the carbon dioxide system, and the liquid level gauge 2 is arranged in the liquid gas sample storage tank 1 of the carbon dioxide system;The controller 24 is further connected with the control end of the heater inlet valve 6, the control end of the heater 7 and the control end of the heater outlet valve 8 of the carbon dioxide system respectively.

[0097] When the gas sample is oxygen, the thermometer 9 does not need to be arranged.

[0098] In the embodiment of the present application, the controller 24 is connected with the sensor assembly through the data acquisition line 22, and the controller 24 is connected with the control end of the carbon dioxide system through the data transmission line 25.

[0099] The computer 23 in the embodiment of the present application is built-in python program, when the gas sample is carbon dioxide, the specific program is as follows:

[0100]

[0101]

[0102]

[0103] When the gas sample is oxygen, the specific procedure is as follows:

[0104]

[0105]

[0106]

[0107] To illustrate the technical effects of the technical solutions provided in the embodiments of the present invention, the embodiments of the present invention also provide the following specific examples.

[0108] The injection pressure at the uranium mine test site has been relatively stable at 1.65 MPa recently. Considering pipeline losses, the gas injection pressure is controlled at 1.8 MPa. The rated pressure of the gas sample storage tank is 3 MPa. That is, when the pressure of the gas sample storage tank is lower than 1.8 MPa, it is necessary to replenish the gas sample storage tank.

[0109] Using a Python program, replenishing oxygen to a storage tank is achieved through the following steps:

[0110] The computer displays P1 = 1.65 MPa, P2 = 1.8 MPa, and P3 = 2.0 MPa.

[0111] Open the outlet valve 3 of the liquid gas sample storage tank and the outlet valve 5 of the vaporizer in sequence.

[0112] At this point, the computer displays P1 = 1.65 MPa, P2 = 1.8 MPa, and P3 = 2.02 MPa. After approximately 50 minutes, it displays P3 = 3 MPa, indicating that the gaseous sample storage tank is full. Close valve 3 at the outlet of the liquid gas sample storage tank.

[0113] In the winter of 2022, the computer displayed P1 = 1.62 MPa, P2 = 1.82 MPa, and P3 = 2.0 MPa. The outlet valve 3 of the liquid gas sample storage tank and the outlet valve 5 of the vaporizer were opened sequentially. The thermometer showed a temperature of -17℃. The heater 7 was turned on, and the heater inlet valve 6 and heater outlet valve 8 were opened. The vaporizer outlet valve 5 was then closed.

[0114] At this point, the computer displays P1 = 1.62 MPa, P2 = 1.82 MPa, and P3 = 2.08 MPa. After approximately 45 minutes, it displays P3 = 3 MPa, indicating that the gaseous sample storage tank is full. Then, sequentially close the outlet valve 3 of the liquid gas sample storage tank and the heater 7.

[0115] Furthermore, in order to illustrate the technical effects of the technical solutions provided in the embodiments of the present invention, the embodiments of the present invention also provide the following specific examples.

[0116] The recent injection pressure of the uranium ore test point is basically stabilized at 1.65 MPa, considering the pipeline loss, the control injection gas pressure (i.e. the injection oxygen pressure) is 1.8 MPa, and the rated pressure of the gaseous gas sample storage tank is 3 MPa, that is, when the pressure of the gaseous gas sample storage tank is lower than 1.8 MPa, the gaseous gas sample storage tank needs to be supplemented with gas.

[0117] The gaseous gas sample storage tank is supplemented with gas according to the following steps:

[0118] The computer end displays P1=1.65 MPa, P2=1.82 MPa, and P3=2.0 MPa.

[0119] The liquid gas sample storage tank outlet valve, the low-temperature liquid pump circuit valve and the bypass valve on the low-temperature liquid pump circuit are opened in turn. After the bypass valve is fully opened, 30 seconds are waited, and then the bypass valve and the low-temperature liquid pump circuit valve are closed in turn, and the low-temperature liquid pump is started, and the rotating speed of the low-temperature liquid pump is adjusted to 750 r / min.

[0120] At this time, the computer end displays P1=1.65 MPa, P2=1.82 MPa, and P3=2.04 MPa. After about 50 min, P3=3 MPa is displayed, that is, the oxygen storage tank is full. The rotating speed of the low-temperature liquid pump is adjusted to 500 r / min, the liquid gas sample storage tank outlet valve is closed, and after 2 min (i.e. the liquid oxygen in the liquid gas sample storage tank outlet valve to the low-temperature liquid pump is vaporized), the low-temperature liquid pump is closed, and the supplementing process is completed.

[0121] In summary, the embodiment of the present application has the following beneficial effects:

[0122] The present application increases the electric control system, uses automatic means to realize precise and rapid oxygen supplementing for the oxygen storage tank, improves the work efficiency and reduces the labor intensity.

[0123] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0124] The principles and implementation manners of the present application are described by using specific examples in this paper. The above embodiment description is only used to help understand the method and core idea of the present application; meanwhile, for the general technical personnel in the field, the specific implementation manner and application range will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as the limitation of the present application.

Claims

1. An automatic gas replenishment method for a land leaching uranium gas extraction station, characterized in that, The automatic air replenishment method includes the following steps: The gas replenishment process of the gas sample storage tank is automatically controlled based on the gas sample storage tank pressure and the gas injection pressure, so that the gas sample storage tank pressure is greater than the gas injection pressure; the gas sample storage tank pressure is the pressure of the gas sample storage tank of the gas replenishment system of the in-situ leaching uranium gas station, and the gas injection pressure is the pressure of the gas sample output from the gas replenishment system to the liquid injection system of the in-situ leaching uranium gas station. The gas injection process is automatically controlled based on the gas injection pressure and the liquid injection pressure, so that the gas injection pressure is greater than the liquid injection pressure; the liquid injection pressure is the pressure of the liquid injection system. The gas sample is carbon dioxide or oxygen, and the gas replenishment system is a carbon dioxide system or an oxygen system; When the gas sample is carbon dioxide, the automatic control of the gas replenishment process of the gas sample storage tank based on the gas sample storage tank pressure and the injection pressure, so that the gas sample storage tank pressure is greater than the injection pressure, specifically includes: When the pressure of the gaseous gas sample storage tank and the injection pressure are detected to meet the gas replenishment conditions, the following operations are performed: Open the outlet valve of the liquid gas sample storage tank and the vaporizer outlet valve of the gas replenishment system, and monitor the pressure of the gas sample storage tank in real time. When the pressure of the gas sample storage tank is detected to be not less than the rated pressure of the gas sample storage tank, close the outlet valve of the liquid gas sample storage tank of the gas replenishment system. When the gas sample is oxygen, the automatic control of the gas replenishment process of the gas sample storage tank based on the gas sample storage tank pressure and the injection pressure, so that the gas sample storage tank pressure is greater than the injection pressure, specifically includes: When the pressure of the gaseous gas sample storage tank and the injection pressure are detected to meet the gas replenishment conditions, the following operations are performed: Open the outlet valve of the liquid gas sample storage tank, the circuit valve of the cryogenic liquid pump, and the bypass valve on the cryogenic liquid pump circuit of the gas replenishment system; After 30 seconds, close the bypass valve and the cryogenic liquid pump circuit valve in sequence, start the cryogenic liquid pump, and adjust the speed of the cryogenic liquid pump to the preset speed. When the pressure increase rate of the gaseous sample storage tank during the gas replenishment process is less than the growth rate threshold, increase the speed of the cryogenic liquid pump. Once the pressure in the gaseous sample storage tank reaches the rated pressure, close the outlet valve of the liquid sample storage tank, and then shut off the cryogenic liquid pump after 2 minutes.

2. The automatic gas replenishment method for a land leaching uranium gas station according to claim 1, characterized in that, After opening the outlet valve of the liquid gas sample storage tank and the vaporizer outlet valve of the gas replenishment system, the following steps are also included: Detect the vaporizer outlet temperature; When the vaporizer outlet temperature is detected to be lower than the minimum temperature threshold, the vaporizer outlet valve is closed, and the heater inlet valve, heater outlet valve, and heater are opened.

3. The automatic gas replenishment method for a land leaching uranium gas station according to claim 1, characterized in that, The conditions for gas replenishment are as follows: ； in, The pressure of the gaseous sample storage tank. This refers to the injection pressure.

4. The automatic gas replenishment method for a land leaching uranium gas station according to claim 1, characterized in that, The gas injection process is automatically controlled based on the gas injection pressure and the liquid injection pressure, ensuring that the gas injection pressure is greater than the liquid injection pressure. Specifically, this includes: When the gas injection pressure and the liquid injection pressure are detected to meet the gas injection adjustment conditions, the following operation is performed: Continuously increase the opening of the pressure reducing valve of the gas replenishment system and monitor the gas injection pressure in real time. When the gas injection pressure is detected to be not less than the gas injection pressure threshold, stop increasing the opening of the pressure reducing valve.

5. The automatic gas replenishment method for a land leaching uranium gas station according to claim 1, characterized in that, Based on the pressure of the gaseous sample storage tank and the injection pressure, the gas replenishment process of the gaseous sample storage tank is automatically controlled to ensure that the pressure of the gaseous sample storage tank is greater than the injection pressure. This process also includes: Detect the liquid level in the liquid gas sample storage tank of the gas replenishment system; When the liquid level is lower than the minimum liquid level threshold, an alarm signal for insufficient liquid gas sample is generated.

6. An automatic gas replenishment device for an in-situ leaching uranium gas extraction station, characterized in that, The automatic gas replenishment device includes a sensor assembly, a controller, and a computer; The sensor assembly is installed in the gas replenishment system and liquid injection system of the in-situ leaching uranium gas station, and the sensor assembly is connected to the controller; the sensor assembly is used to detect the pressure of the gaseous gas sample storage tank, the gas injection pressure, and the liquid injection pressure; The controller is connected to the computer and is also connected to the control terminal of the gas replenishment system. The computer is used to control the controller to control the gas replenishment system of the uranium leaching gas station using the automatic gas replenishment method according to any one of claims 1-5. The gas replenishment system is either a carbon dioxide system or an oxygen system.

7. The automatic gas replenishment device for a land leaching uranium gas station according to claim 6, characterized in that, The sensor assembly includes a first pressure gauge, a second pressure gauge, and a third pressure gauge; The first pressure gauge is installed in the liquid injection system, the second pressure gauge is installed at the outlet of the steam injection valve of the gas replenishment system, and the third pressure gauge is installed at the outlet of the gas sample storage tank. The controller is connected to the control terminals of the liquid gas sample storage tank outlet valve, the vaporizer outlet valve, the gaseous gas sample storage tank outlet valve, the pressure reducing valve, and the gas injection valve of the carbon dioxide system.

8. The automatic gas replenishment device for a land leaching uranium gas station according to claim 7, characterized in that, When the gas replenishment system is a carbon dioxide system, the sensor assembly further includes a thermometer and a level gauge; the thermometer is installed at the outlet of the vaporizer outlet valve of the carbon dioxide system, and the level gauge is installed inside the liquid gas sample storage tank of the gas replenishment system; the controller is also connected to the control terminal of the heater inlet valve, the control terminal of the heater, and the control terminal of the heater outlet valve of the gas replenishment system, respectively. When the gas replenishment system is an oxygen system, the sensor assembly further includes a level gauge, which is installed in the liquid gas sample storage tank of the gas replenishment system.

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