Coal rock soaking system

Abstract

The invention provides a coal rock soaking system, comprising: a reaction kettle for accommodating a dried coal rock sample; the first soaking device is connected with the reaction kettle, and the first soaking device is used for conveying deionized water to the reaction kettle and discharging the deionized water out of the reaction kettle after the coal rock sample is soaked in the deionized water for a first preset time; the second soaking device is connected with the reaction kettle, and the second soaking device is used for conveying carbon dioxide to the reaction kettle and converting the carbon dioxide into a supercritical state after the deionized water is discharged out of the reaction kettle, and discharging the carbon dioxide out of the reaction kettle after the coal rock sample is soaked in the supercritical carbon dioxide for a second preset time. According to the coal rock soaking system disclosed by the invention, the coal rock sample does not need to be transferred in the whole process, so that the process is simple, the test efficiency of the coal rock sample is improved, and the risk of damage of the coal rock sample is effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal-rock testing, and in particular to a coal-rock immersion system. Background Art

[0002] In the field of geological engineering technology, the use of supercritical carbon dioxide to improve the efficiency of coalbed methane (gas) extraction has broad application prospects. The water content of coal rock itself under different stratum conditions will affect the degree of supercritical carbon dioxide transformation of coal rock properties. At present, the study of the influence mechanism of supercritical carbon dioxide on coal rock properties under laboratory conditions is usually carried out by immersion.

[0003] In studying the influence of moisture content on the modification of coal rock by supercritical carbon dioxide, most existing research methods require the coal rock samples to be transferred to different equipment multiple times. This is not only a cumbersome process, resulting in low test efficiency of the coal rock samples, but also increases the risk of damage to the coal rock samples. Summary of the invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, an object of the present disclosure is to provide a coal rock soaking system.

[0006] To achieve the above-mentioned purpose, the present disclosure provides a coal rock immersion system, comprising: a reactor, the reactor being used to accommodate dried coal rock samples; a first immersion device, the first immersion device being connected to the reactor and being used to transport deionized water to the reactor, and to discharge the deionized water from the reactor after the deionized water has been immersed in the coal rock sample for a first preset time; a second immersion device, the second immersion device being connected to the reactor and being used to transport carbon dioxide to the reactor and convert the carbon dioxide into a supercritical state after the deionized water has been immersed in the reactor for a second preset time, and to discharge the carbon dioxide from the reactor after the supercritical carbon dioxide has been immersed in the coal rock sample for a second preset time.

[0007] Optionally, the first immersion device includes: a first storage module, the deionized water is arranged in the first storage module, and the liquid outlet end of the first storage module is connected to the liquid inlet end of the reactor, and the liquid inlet end of the first storage module is connected to the liquid outlet end of the reactor; a first control module, the output end of the first control module is connected to the input end of the first storage module, and the first control module is used to control the first storage module to transport the deionized water to the reactor according to a third preset time, and after the first preset time, discharge the deionized water from the reactor according to a fourth preset time.

[0008] Optionally, the first storage module includes: a first storage tank, in which the deionized water is arranged; a first pump body, wherein the liquid inlet end of the first pump body is connected to the liquid outlet end of the first storage tank, and the liquid outlet end of the first pump body is connected to the first interface of the reactor; a second pump body, wherein the liquid inlet end of the second pump body is connected to the second interface of the reactor, and the liquid outlet end of the second pump body is connected to the liquid inlet end of the first recovery tank; wherein the output end of the first control module is respectively connected to the input end of the first pump body and the input end of the second pump body, and the first control module is used to control the first pump body to start for the third preset time, and, after the first preset time, control the second pump body to start for the fourth preset time.

[0009] Optionally, the first storage module further includes: a drain pipe, which is disposed in the reactor, and a liquid inlet end of the drain pipe extends to the bottom of the reactor, and a liquid outlet end of the drain pipe is connected to a second interface of the reactor.

[0010] Optionally, the second immersion device includes: a second storage module, in which the carbon dioxide with a preset pressure is arranged, and the liquid outlet end of the second storage module is connected to the liquid inlet end of the reactor, and the air inlet end of the second storage module is connected to the air outlet end of the reactor; a heating module, and the heating module is connected to the reactor; a second control module, the output end of the second control module is respectively connected to the input end of the second storage module and the input end of the heating module, and the second control module is used to control the second storage module to transport carbon dioxide to the reactor according to a fifth preset time after the deionized water is discharged from the reactor, and control the heating module to heat the reactor according to a preset temperature so that the carbon dioxide is converted into a supercritical state, and, after the second preset time, turn off the heating module and discharge the carbon dioxide from the reactor according to a sixth preset time.

[0011] Optionally, the second storage module includes: a second storage tank, in which the carbon dioxide having the preset pressure is arranged; a third pump body, wherein the liquid inlet end of the third pump body is connected to the liquid outlet end of the second storage tank, and the liquid outlet end of the third pump body is connected to the third interface of the reactor; wherein the fourth interface of the reactor is connected to the air inlet end of the second recovery tank, and the output end of the second control module is respectively connected to the input end of the third pump body and the input end of the fourth interface, and the second control module is used to control the third pump body to open for the fifth preset time, and, after turning off the heating module, to control the fourth interface of the reactor to open for the sixth preset time.

[0012] Optionally, the heating module includes: a heating pool, a heating tank is provided in the heating pool, and the reactor is provided in the heating tank; a third storage tank, a heat exchange fluid with the preset temperature is provided in the third storage tank; a fourth pump body, the liquid inlet end of the fourth pump body is connected to the liquid outlet end of the third storage tank, and the liquid outlet end of the fourth pump body is connected to the liquid inlet end of the heating tank; a fifth pump body, the liquid inlet end of the fifth pump body is connected to the liquid outlet end of the heating tank, and the liquid outlet end of the fifth pump body is connected to the liquid inlet end of the third recovery tank; wherein, the output end of the second control module is respectively connected to the input end of the fourth pump body and the input end of the fifth pump body, and the second control module is used to control the fourth pump body to start for the seventh preset time, and after the second preset time, control the fifth pump body to start for the eighth preset time.

[0013] Optionally, the second immersion device also includes: a sixth pump body, the air inlet end of the sixth pump body is connected to the fourth interface of the reactor; wherein the output end of the second control module is connected to the input end of the sixth pump body, and the second control module is used to control the sixth pump body to open for a ninth preset time after the deionized water is discharged from the reactor.

[0014] Optionally, the second immersion device also includes: a pressure detection unit, the detection end of the pressure detection unit is arranged in the reactor, and the output end of the pressure detection unit is connected to the input end of the second control module; and / or, a temperature detection unit, the detection end of the temperature detection unit is arranged in the reactor, and the output end of the temperature detection unit is connected to the input end of the second control module.

[0015] Optionally, the coal rock immersion system also includes: a fixing device, which includes: a support net, a plurality of positioning rods and an adjustment ring, the support net is arranged in the reactor, and the support net is used to support the coal sample, the positioning rods are inserted in the mesh holes of the support net, and the plurality of positioning rods are distributed at intervals along the circumference of the coal sample, and the adjustment ring is arranged on the plurality of positioning rods.

[0016] The technical solution provided by the present disclosure may have the following beneficial effects:

[0017] The first immersion device is used to adjust and control the moisture content of the coal rock sample in the reactor, and the second immersion device is used to immerse the coal rock sample in supercritical carbon dioxide in the reactor. The entire process does not require the transfer of the coal rock sample, which not only simplifies the process, thereby improving the test efficiency of the coal rock sample, but also effectively reduces the risk of damage to the coal rock sample.

[0018] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a structural schematic diagram of a coal rock immersion system proposed in an embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of a first storage module in a coal-rock immersion system according to an embodiment of the present disclosure;

[0022] Figure 3 is a structural schematic diagram of a second storage module in a coal-rock immersion system according to an embodiment of the present disclosure;

[0023] Figure 4 It is a structural schematic diagram of a heating module in a coal-rock immersion system according to an embodiment of the present disclosure;

[0024] As shown in the figure: 1, reactor, 11, first interface, 12, second interface, 13, third interface, 14, fourth interface;

[0025] 2. The first soaking device;

[0026] 21. first storage module, 211. first storage tank, 212. first pump body, 213. second pump body, 214. drainage pipe;

[0027] 22. A first control module;

[0028] 3. Second soaking device;

[0029] 31. second storage module, 311. second storage tank, 312. third pump body;

[0030] 32. Heating module, 321. Heating tank, 322. Third storage tank, 323. Fourth pump body, 324. Fifth pump body;

[0031] 33. a second control module, 34. a sixth pump body, 35. a pressure detection unit, 36. a temperature detection unit;

[0032] 4. Fixing device, 41. Support net, 42. Positioning rod, 43. Adjusting ring;

[0033] 5. Coal and rock samples. DETAILED DESCRIPTION

[0034] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0035] like Figure 1 As shown, the disclosed embodiment proposes a coal rock immersion system, including: a reactor 1, a first immersion device 2 and a second immersion device 3, the reactor 1 is used to accommodate a dried coal rock sample 5, the first immersion device 2 is connected to the reactor 1, and the first immersion device 2 is used to transport deionized water to the reactor 1, and discharge the deionized water from the reactor 1 after the deionized water has been immersed in the coal rock sample 5 for a first preset time, the second immersion device 3 is connected to the reactor 1, and the second immersion device 3 is used to transport carbon dioxide to the reactor 1 after the deionized water has been exhausted from the reactor 1 and convert the carbon dioxide into a supercritical state, and discharge the carbon dioxide from the reactor 1 after the supercritical carbon dioxide has been immersed in the coal rock sample 5 for a second preset time.

[0036] It can be understood that when the dried coal rock sample 5 is placed in the reactor 1, the first immersion device 2 transports deionized water to the reactor 1, and discharges the deionized water from the reactor 1 after the deionized water has been immersed in the coal rock sample 5 for a first preset time, thereby realizing the moisture content adjustment and control of the coal rock sample 5, so that the moisture content of the coal rock sample 5 can reach the target moisture content. Thereafter, the second immersion device 3 transports carbon dioxide to the reactor 1 and converts the carbon dioxide into a supercritical state, and discharges the carbon dioxide from the reactor 1 after the supercritical carbon dioxide has been immersed in the coal rock sample 5 for a second preset time, thereby realizing the supercritical carbon dioxide immersion of the coal rock sample 5 with the target moisture content.

[0037] Among them, the first immersion device 2 is used to realize the moisture content regulation and control of the coal rock sample 5 in the reactor 1, and the second immersion device 3 is used to realize the supercritical carbon dioxide immersion of the coal rock sample 5 in the reactor 1. The whole process does not require the transfer of the coal rock sample 5. Not only is the process simple, thereby improving the test efficiency of the coal rock sample 5, but it also effectively reduces the risk of damage to the coal rock sample 5.

[0038] It should be noted that the coal rock sample 5 is a sample taken from the coal rock body, and the coal rock sample 5 needs to be dried before being placed in the reactor 1, so that the moisture content of the coal rock sample 5 is lower than the preset moisture content, that is, the coal rock sample 5 is in a dry state, so that the target moisture content can be accurately reached under the control of the first immersion device 2. The specific type of the coal rock sample 5 can be set according to actual needs, and there is no limitation to this. For example, the coal rock sample 5 can be a rectangular parallelepiped structure, a cube structure, a cylindrical structure, a prism structure, etc.

[0039] The reactor 1 is used to accommodate the dried coal rock sample 5 and provide a deionized water immersion space and a supercritical carbon dioxide immersion space for the coal rock sample 5. The specific type of the reactor 1 can be set according to actual needs and is not limited to this. For example, the reactor 1 includes: a reactor body and a reactor cover, the reactor body has an upward reaction tank, the coal rock sample 5 is arranged in the reaction tank, and the reactor cover is detachably covered on the notch of the reaction tank.

[0040] Among them, the reactor 1 has multiple interfaces to facilitate the connection of the first immersion device 2, the second immersion device 3, etc. Specifically, the reactor 1 may include: a first interface 11, a second interface 12, a third interface 13 and a fourth interface 14, the first interface 11, the second interface 12, the third interface 13 and the fourth interface 14 are respectively arranged on the reactor cover, and the first interface 11, the second interface 12, the third interface 13 and the fourth interface 14 respectively include: a pipeline passing through the reactor cover and a switch valve arranged on the pipeline, the first interface 11 can be used to pass deionized water, the second interface 12 can be used to discharge deionized water, the third interface 13 can be used to pass carbon dioxide, and the fourth interface 14 can be used to discharge carbon dioxide and exhaust air.

[0041] The kettle cover can be detachably fixed on the notch of the reaction tank by bolt fixing, lock fixing or the like.

[0042] The first immersion device 2 is used for immersing the coal rock sample 5 in deionized water to achieve moisture content regulation and control of the coal rock sample 5. The specific type of the first immersion device 2 can be set according to actual needs and is not limited to this.

[0043] The first preset time can be set according to actual needs, and there is no limitation on this. Different first preset times can achieve different deionized water immersion effects for the coal rock sample 5.

[0044] The second immersion device 3 is used for immersing the coal rock sample 5 in supercritical carbon dioxide. The soaked coal rock sample 5 is used for testing to study the influence of moisture content on the supercritical carbon dioxide coal rock modification effect. The specific type of the second immersion device 3 can be set according to actual needs and is not limited to this.

[0045] The second preset time can be set according to actual needs, and there is no limitation on this. Different second preset times can achieve different supercritical carbon dioxide immersion effects for the coal rock sample 5.

[0046] Supercritical carbon dioxide refers to a unique fluid state in which carbon dioxide is neither gaseous nor liquid or solid under specific temperature and pressure conditions. In the supercritical state, carbon dioxide has some unique physical and chemical properties.

[0047] like Figure 2 As shown, in some embodiments, the first immersion device 2 includes: a first storage module 21 and a first control module 22, deionized water is arranged in the first storage module 21, and the liquid outlet end of the first storage module 21 is connected to the liquid inlet end of the reactor 1, the liquid inlet end of the first storage module 21 is connected to the liquid outlet end of the reactor 1, the output end of the first control module 22 is connected to the input end of the first storage module 21, and the first control module 22 is used to control the first storage module 21 to transport deionized water to the reactor 1 according to the third preset time, and after the first preset time, discharge the deionized water from the reactor 1 according to the fourth preset time.

[0048] It can be understood that, since the liquid outlet end of the first storage module 21 is connected to the liquid inlet end of the reactor 1, the first storage module 21 can transport deionized water into the reactor 1, and since the liquid inlet end of the first storage module 21 is connected to the liquid outlet end of the reactor 1, the first storage module 21 discharges the deionized water from the reactor 1. At the same time, since the output end of the first control module 22 is connected to the input end of the first storage module 21, the first control module 22 can control the transport and discharge actions of the first storage module 21.

[0049] Among them, the first control module 22 controls the first storage module 21 to deliver deionized water to the reactor 1 according to the third preset time, and after the first preset time, discharges the deionized water from the reactor 1 according to the fourth preset time, thereby realizing the moisture content adjustment and control of the coal rock sample 5, so that the moisture content of the coal rock sample 5 can reach the target moisture content.

[0050] It should be noted that the first storage module 21 is used to transport deionized water to the reactor 1 and discharge deionized water from the reactor 1 under the control of the first control module 22. The specific type of the first storage module 21 can be set according to actual needs and is not limited to this.

[0051] The first control module 22 is used to control the conveying and discharging actions of the first storage module 21. The specific type of the first control module 22 can be set according to actual needs and is not limited to this. For example, the first control module 22 can be a controller, and the controller is external in the form of a control panel. The first control module 22 has a key input function, a display function, etc.

[0052] The third preset time can be set according to actual needs, and there is no limitation on this. Different third preset times can achieve different amounts of deionized water input into the reactor 1, thereby achieving different deionized water immersion effects for the coal rock sample 5.

[0053] The fourth preset time can be set according to actual needs and is not limited thereto. Different fourth preset times can achieve different amounts of deionized water discharge from the reactor 1. Therefore, the fourth preset time should be set to ensure that the deionized water in the reactor 1 is drained without taking up too much time.

[0054] like Figure 2 As shown, in some embodiments, the first storage module 21 includes: a first storage tank 211, a first pump body 212 and a second pump body 213, deionized water is provided in the first storage tank 211, the liquid inlet end of the first pump body 212 is connected to the liquid outlet end of the first storage tank 211, and the liquid outlet end of the first pump body 212 is connected to the first interface 11 of the reactor 1, the liquid inlet end of the second pump body 213 is connected to the second interface 12 of the reactor 1, and the liquid outlet end of the second pump body 213 is connected to the liquid inlet end of the first recovery tank. Among them, the output end of the first control module 22 is respectively connected to the input end of the first pump body 212 and the input end of the second pump body 213, and the first control module 22 is used to control the first pump body 212 to start for a third preset time, and, after the first preset time, control the second pump body 213 to start for a fourth preset time.

[0055] It can be understood that, since the liquid inlet end of the first pump body 212 is connected to the liquid outlet end of the first storage tank 211, and the liquid outlet end of the first pump body 212 is connected to the first interface 11 of the reactor 1, the first pump body 212 can transport the deionized water in the first storage tank 211 to the reactor 1, and since the liquid inlet end of the second pump body 213 is connected to the second interface 12 of the reactor 1, and the liquid outlet end of the second pump body 213 is connected to the liquid inlet end of the first recovery tank, the second pump body 213 can discharge the deionized water from the reactor 1 to the first recovery tank. At the same time, since the output end of the first control module 22 is respectively connected to the input end of the first pump body 212 and the input end of the second pump body 213, the first control module 22 can control the switching state of the first pump body 212 and the second pump body 213, thereby controlling the input and discharge of deionized water in the reactor 1.

[0056] Among them, the first control module 22 controls the first pump body 212 to start for the third preset time, and, after the first preset time, controls the second pump body 213 to start for the fourth preset time, thereby realizing the moisture content adjustment control of the coal rock sample 5, so that the moisture content of the coal rock sample 5 can reach the target moisture content.

[0057] It should be noted that the first storage tank 211 is used to store deionized water. The specific type of the first storage tank 211 can be set according to actual needs and is not limited to this. For example, the first storage tank 211 can be a tank structure.

[0058] The first pump body 212 is used to deliver deionized water to the reactor 1. The specific type of the first pump body 212 can be set according to actual needs and is not limited thereto. The first interface 11 and the first pump body 212 are switched on and off synchronously.

[0059] The second pump body 213 is used to discharge deionized water from the reactor 1. The specific type of the second pump body 213 can be set according to actual needs and is not limited thereto. The second interface 12 and the second pump body 213 are switched on and off synchronously.

[0060] The first recovery tank is used to recover the deionized water after soaking the coal rock sample 5. The specific type of the first recovery tank can be set according to actual needs and is not limited to this. For example, the first recovery tank can be a tank structure. After the deionized water in the first recovery tank is filtered, precipitated and other processes, the new deionized water produced can be transported to the first storage tank 211 for recycling to reduce costs.

[0061] like Figure 1 As shown, in some embodiments, the first storage module 21 also includes: a drain pipe 214, which is arranged in the reactor 1, and the liquid inlet end of the drain pipe 214 extends to the bottom of the reactor 1, and the liquid outlet end of the drain pipe 214 is connected to the second interface 12 of the reactor 1.

[0062] It can be understood that since the liquid inlet end of the drain pipe 214 extends to the bottom of the reactor 1, and the liquid outlet end of the drain pipe 214 is connected to the second interface 12 of the reactor 1, the second pump body 213 can discharge the deionized water at the bottom of the reactor 1 into the first recovery tank, thereby avoiding the residual deionized water in the reactor 1 affecting the immersion effect of supercritical carbon dioxide on the coal rock sample 5.

[0063] It should be noted that the drain pipe 214 is used to cooperate with the second pump body 213 to empty the deionized water in the reactor 1. The specific type of the drain pipe 214 can be set according to actual needs and is not limited to this. For example, the drain pipe 214 is a pipe body structure that is close to an L-shape. One end of the drain pipe 214 is connected to the second interface 12, and the other end of the drain pipe 214 is attached to the bottom of the reaction tank.

[0064] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the second immersion device 3 includes: a second storage module 31, a heating module 32 and a second control module 33, the second storage module 31 is provided with carbon dioxide with a preset pressure, and the liquid outlet end of the second storage module 31 is connected to the liquid inlet end of the reactor 1, the air inlet end of the second storage module 31 is connected to the air outlet end of the reactor 1, the heating module 32 is connected to the reactor 1, the output end of the second control module 33 is respectively connected to the input end of the second storage module 31 and the input end of the heating module 32, and the second control module 33 is used to control the second storage module 31 to transport carbon dioxide to the reactor 1 according to the fifth preset time after the deionized water is discharged from the reactor 1, and control the heating module 32 to heat the reactor 1 according to the preset temperature so that the carbon dioxide is converted into a supercritical state, and, after the second preset time, turn off the heating module 32 and discharge the carbon dioxide from the reactor 1 according to the sixth preset time.

[0065] It can be understood that, since the liquid outlet end of the second storage module 31 is connected to the liquid inlet end of the reactor 1, the second storage module 31 can transport carbon dioxide with a preset pressure into the reactor 1, and since the air inlet end of the second storage module 31 is connected to the air outlet end of the reactor 1, the second storage module 31 can discharge carbon dioxide from the reactor 1. At the same time, since the heating module 32 is connected to the reactor 1, the heating module 32 can heat the reactor 1. Moreover, since the output end of the second control module 33 is respectively connected to the input end of the second storage module 31 and the input end of the heating module 32, the second control module 33 can control the transport and discharge actions of the second storage module 31 and the heating action of the heating module 32.

[0066] Among them, the second control module 33 controls the second storage module 31 to deliver carbon dioxide to the reactor 1 according to the fifth preset time, and controls the heating module 32 to heat the reactor 1 according to the preset temperature to convert the carbon dioxide into a supercritical state, and, after the second preset time, turns off the heating module 32 and discharges the carbon dioxide from the reactor 1 according to the sixth preset time, thereby realizing the supercritical carbon dioxide immersion of the coal rock sample 5 with the target moisture content.

[0067] It should be noted that the second storage module 31 is used to deliver carbon dioxide with a preset pressure to the reactor 1 under the control of the second control module 33, and to discharge carbon dioxide from the reactor 1. The specific type of the second storage module 31 can be set according to actual needs and is not limited to this.

[0068] The heating module 32 is used to heat the reactor 1 so that the carbon dioxide with a preset pressure in the reactor 1 can reach a preset temperature, thereby achieving a supercritical state. The specific type of the heating module 32 can be set according to actual needs and is not limited to this.

[0069] The second control module 33 is used to control the conveying and discharging actions of the second storage module 31, and the heating action of the heating module 32. The specific type of the second control module 33 can be set according to actual needs and is not limited to this. For example, the second control module 33 can be a controller, and the controller is external in the form of a control panel. The second control module 33 has a key input function, a display function, etc.

[0070] The fifth preset time can be set according to actual needs and is not limited thereto. Different fifth preset times can achieve different amounts of carbon dioxide input into the reactor 1, thereby achieving different supercritical carbon dioxide immersion effects for the coal rock sample 5.

[0071] The sixth preset time can be set according to actual needs, and there is no limitation on this. Different sixth preset times can achieve different amounts of carbon dioxide discharge in the reactor 1. Therefore, the setting of the sixth preset time should ensure that the carbon dioxide in the reactor 1 is emptied without taking up too much time.

[0072] Among them, carbon dioxide achieves a supercritical state after reaching a preset pressure and a preset temperature. The preset pressure is achieved by the second storage module 31, and the preset temperature is achieved by the heating module 32. When the soaking is completed, the temperature and pressure in the reactor 1 drop, which is conducive to the gasification and discharge of carbon dioxide.

[0073] like Figure 3 As shown, in some embodiments, the second storage module 31 includes: a second storage tank 311 and a third pump body 312, the second storage tank 311 is provided with carbon dioxide with a preset pressure, the liquid inlet end of the third pump body 312 is connected to the liquid outlet end of the second storage tank 311, and the liquid outlet end of the third pump body 312 is connected to the third interface 13 of the reactor 1. Among them, the fourth interface 14 of the reactor 1 is connected to the air inlet end of the second recovery tank, and the output end of the second control module 33 is respectively connected to the input end of the third pump body 312 and the input end of the fourth interface 14, and the second control module 33 is used to control the third pump body 312 to start for the fifth preset time, and, after the heating module 32 is turned off, control the fourth interface 14 of the reactor 1 to start for the sixth preset time.

[0074] It can be understood that, since the liquid inlet end of the third pump body 312 is connected to the liquid outlet end of the second storage tank 311, and the liquid outlet end of the third pump body 312 is connected to the third interface 13 of the reactor 1, the third pump body 312 can transport the carbon dioxide with a preset pressure in the second storage tank 311 to the reactor 1, and, since the fourth interface 14 of the reactor 1 is connected to the air inlet end of the second recovery tank, the fourth interface 14 can discharge the carbon dioxide in the second storage tank 311 into the second recovery tank. At the same time, since the output end of the second control module 33 is respectively connected to the input end of the third pump body 312 and the input end of the fourth interface 14, the second control module 33 can control the switching state of the third pump body 312 and the fourth interface 14, thereby controlling the input and discharge of carbon dioxide in the reactor 1.

[0075] Among them, the second control module 33 controls the third pump body 312 to open for the fifth preset time, and, after closing the heating module 32, controls the fourth interface 14 of the reactor 1 to open for the sixth preset time, thereby realizing supercritical carbon dioxide immersion of the coal rock sample 5 with the target moisture content.

[0076] It should be noted that the second storage tank 311 is used to store carbon dioxide with a preset pressure. The specific type of the second storage tank 311 can be set according to actual needs and is not limited to this. For example, the second storage tank 311 can be a tank structure.

[0077] The third pump body 312 is used to deliver carbon dioxide with a preset pressure to the reactor 1. The specific type of the third pump body 312 can be set according to actual needs and is not limited thereto. The third interface 13 and the third pump body 312 are switched on and off synchronously.

[0078] The switch valve input end in the fourth interface 14 is connected to the output end of the second control module 33 , and the second control module 33 controls the switch valve of the fourth interface 14 to open for a sixth preset time, thereby achieving the discharge of carbon dioxide in the reactor 1 .

[0079] The second recovery tank is used to recover the carbon dioxide after soaking the coal rock sample 5. The specific type of the second recovery tank can be set according to actual needs and is not limited to this. For example, the second recovery tank can be a tank structure. After the carbon dioxide in the second recovery tank is filtered and other processes, the new carbon dioxide generated can be transported to the second storage tank 311 for recycling to reduce costs.

[0080] like Figure 4As shown, in some embodiments, the heating module 32 includes: a heating pool 321, a third storage tank 322, a fourth pump body 323 and a fifth pump body 324, a heating tank is provided in the heating pool 321, and the reactor 1 is provided in the heating tank, a heat exchange fluid with a preset temperature is provided in the third storage tank 322, the liquid inlet end of the fourth pump body 323 is connected to the liquid outlet end of the third storage tank 322, and the liquid outlet end of the fourth pump body 323 is connected to the liquid inlet end of the heating tank, the liquid inlet end of the fifth pump body 324 is connected to the liquid outlet end of the heating tank, and the liquid outlet end of the fifth pump body 324 is connected to the liquid inlet end of the third recovery tank. Among them, the output end of the second control module 33 is connected to the input end of the fourth pump body 323 and the input end of the fifth pump body 324 respectively, and the second control module 33 is used to control the fourth pump body 323 to start the seventh preset time, and after the second preset time, control the fifth pump body 324 to start the eighth preset time.

[0081] It can be understood that, since the liquid inlet end of the fourth pump body 323 is connected to the liquid outlet end of the third storage tank 322, and the liquid outlet end of the fourth pump body 323 is connected to the liquid inlet end of the heating tank, the fourth pump body 323 can transport the heat exchange fluid in the third storage tank 322 to the heating tank, so that the heat exchange fluid in the heating tank is used to heat the reactor 1, and since the liquid inlet end of the fifth pump body 324 is connected to the liquid outlet end of the heating tank, and the liquid outlet end of the fifth pump body 324 is connected to the liquid inlet end of the third recovery tank, the fifth pump body 324 can discharge the heat exchange fluid in the heating tank into the third recovery tank, so that the reactor 1 is cooled by the discharge of the heat exchange fluid. At the same time, since the output end of the second control module 33 is respectively connected to the input end of the fourth pump body 323 and the input end of the fifth pump body 324, the second control module 33 can control the switching state of the fourth pump body 323 and the fifth pump body 324, and then control the switch of the heating module 32.

[0082] Among them, the second control module 33 controls the fourth pump body 323 to start for the seventh preset time, and after the second preset time, controls the fifth pump body 324 to start for the eighth preset time, thereby realizing the heating of the carbon dioxide with a preset pressure in the reactor 1, thereby realizing the supercritical state of carbon dioxide, and further realizing the supercritical carbon dioxide immersion of the coal rock sample 5 with the target moisture content.

[0083] It should be noted that the heating pool 321 is used to accommodate the reactor 1 and the heat exchange fluid so as to utilize the heat exchange fluid to heat the reactor 1. The specific type of the heating pool 321 can be set according to actual needs and is not limited to this. For example, the heating pool 321 can be a box structure, and the middle part of the box forms an upward heating groove. The reactor 1 is arranged in the heating groove using a plurality of support blocks, and the heat exchange fluid immerses the reactor body of the reactor 1. At the same time, the first immersion device 2, the second immersion device 3, etc. are all integrated and arranged on the box, and the bottom of the box is provided with walking wheels with a locking function.

[0084] The third storage tank 322 is used to store heat exchange fluid. The specific type of the third storage tank 322 can be set according to actual needs and is not limited to this. For example, the third storage tank 322 can be a tank structure.

[0085] The heat exchange fluid may be water, and the heat exchange fluid immerses the reactor body 1 to achieve water bath heating.

[0086] The fourth pump body 323 is used to transport the heat exchange fluid to the heating tank. The specific type of the fourth pump body 323 can be set according to actual needs and is not limited to this.

[0087] The seventh preset time can be set according to actual needs, and there is no limitation on this. Different seventh preset times can achieve different amounts of heat exchange fluid input into the heating tank, thereby achieving different heating effects of the reactor 1.

[0088] The fifth pump body 324 is used to discharge the heat exchange fluid from the heating tank. The specific type of the fifth pump body 324 can be set according to actual needs and is not limited to this.

[0089] The eighth preset time can be set according to actual needs and is not limited thereto. Different eighth preset times can achieve different amounts of heat exchange fluid discharge from the heating tank. Therefore, the eighth preset time should be set to ensure that the heat exchange fluid in the heating tank is emptied without taking up too much time.

[0090] like Figure 3 As shown, in some embodiments, the second soaking device 3 further includes: a sixth pump body 34, and the air inlet end of the sixth pump body 34 is connected to the fourth interface 14 of the reactor 1. The output end of the second control module 33 is connected to the input end of the sixth pump body 34, and the second control module 33 is used to control the sixth pump body 34 to start for a ninth preset time after the deionized water is discharged from the reactor 1.

[0091] It can be understood that, since the air inlet end of the sixth pump body 34 is connected to the fourth interface 14 of the reactor 1, the sixth pump body 34 can pump out the air in the reactor 1, thereby achieving a vacuum state in the reactor 1. At the same time, since the output end of the second control module 33 is connected to the input end of the sixth pump body 34, the second control module 33 can control the switch state of the sixth pump body 34. Among them, the second control module 33 controls the sixth pump body 34 to start the ninth preset time, thereby achieving a vacuum state in the reactor 1, thereby preventing the air in the reactor 1 from affecting the supercritical carbon dioxide immersion effect of the coal rock sample 5.

[0092] It should be noted that after the deionized water is discharged from the reactor 1 , the sixth pump body 34 is turned on for a ninth preset time to achieve a vacuum state of the reactor 1 , and then, carbon dioxide with a preset pressure is delivered to the reactor 1 .

[0093] The sixth pump body 34 is used to discharge the air in the reactor 1. The specific type of the sixth pump body 34 can be set according to actual needs and is not limited to this.

[0094] like Figure 1 As shown, in some embodiments, the second immersion device 3 further includes: a pressure detection unit 35 , a detection end of the pressure detection unit 35 is arranged in the reactor 1 , and an output end of the pressure detection unit 35 is connected to an input end of the second control module 33 .

[0095] It can be understood that since the detection end of the pressure detection unit 35 is arranged in the reactor 1, and the output end of the pressure detection unit 35 is connected to the input end of the second control module 33, the second control module 33 can use the pressure detection unit 35 to obtain the pressure in the reactor 1, thereby facilitating pressure monitoring.

[0096] It should be noted that the pressure detection unit 35 is used to detect the pressure in the reactor 1. The specific type of the pressure detection unit 35 can be set according to actual needs and is not limited to this. For example, the pressure detection unit 35 can be a pressure sensor.

[0097] The pressure of the reactor 1 detected by the pressure detection unit 35 can be used to monitor the supercritical state of carbon dioxide in the reactor 1, the input and discharge state of carbon dioxide in the reactor 1, the exhaust state of air in the reactor 1, etc.

[0098] like Figure 1 As shown, in some embodiments, the second immersion device 3 further includes: a temperature detection unit 36 ​​, a detection end of the temperature detection unit 36 ​​is arranged in the reactor 1 , and an output end of the temperature detection unit 36 ​​is connected to an input end of the second control module 33 .

[0099] It can be understood that since the detection end of the temperature detection unit 36 ​​is set in the reactor 1, and the output end of the temperature detection unit 36 ​​is connected to the input end of the second control module 33, the second control module 33 can use the temperature detection unit 36 ​​to obtain the temperature in the reactor 1, thereby facilitating temperature monitoring.

[0100] It should be noted that the temperature detection unit 36 ​​is used to detect the temperature in the reactor 1. The specific type of the temperature detection unit 36 ​​can be set according to actual needs and is not limited to this. For example, the temperature detection unit 36 ​​can be a temperature sensor.

[0101] The temperature of the reactor 1 detected by the temperature detection unit 36 ​​can be used to monitor the supercritical state of carbon dioxide in the reactor 1, the input and discharge state of the heat exchange fluid in the heating tank, etc.

[0102] like Figure 1 As shown, in some embodiments, the coal rock immersion system also includes: a fixing device 4, the fixing device 4 includes: a support net 41, a plurality of positioning rods 42 and an adjustment ring 43, the support net 41 is arranged in the reactor 1, and the support net 41 is used to carry the coal sample, the positioning rod 42 is inserted in the mesh of the support net 41, and the plurality of positioning rods 42 are distributed at intervals along the circumference of the coal sample, and the adjustment ring 43 is sleeved on the plurality of positioning rods 42.

[0103] It can be understood that, since the support net 41 is arranged in the reactor 1, the coal sample can be arranged in the reactor 1 by using the support net 41, and at the same time, the mesh structure of the support net 41 is used to achieve sufficient contact with the carbon dioxide, and since the plurality of positioning rods 42 are distributed at intervals along the circumference of the coal sample, and the adjustment ring 43 is sleeved on the plurality of positioning rods 42, the coal sample can be positioned on the support net 41 by using the plurality of positioning rods 42 and the adjustment ring 43, thereby ensuring the stable immersion of the coal sample. At the same time, since the positioning rods 42 are inserted in the mesh of the support net 41 and the adjustment function of the adjustment ring 43, the disassembly and assembly operation of the coal sample in the reactor 1 is more convenient, thereby ensuring a higher test efficiency of the coal sample.

[0104] It should be noted that the support net 41 is used to carry the coal sample. The specific type of the support net 41 can be set according to actual needs and is not limited to this. For example, the support net 41 is a metal net structure, and the support net 41 is arranged in the middle of the reaction tank along the horizontal direction.

[0105] The positioning rod 42 is used to cooperate with the adjustment ring 43 to realize the positioning of the coal sample on the support net 41. The specific type of the positioning rod 42 can be set according to actual needs and is not limited to this. For example, the positioning rod 42 is a metal rod structure, and the diameter of the positioning rod 42 is adapted to the mesh aperture of the support net 41.

[0106] The adjustment ring 43 is used to cooperate with multiple positioning rods 42 to realize the positioning of the coal sample on the support net 41. The specific type of the adjustment ring 43 can be set according to actual needs and is not limited to this. For example, the adjustment ring 43 can be a metal clamp. After the adjustment ring 43 is sleeved on the multiple positioning rods 42 and tightened, the positioning rods 42 can fix the coal sample.

[0107] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0108] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0110] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A coal rock soaking system, characterized in that: include: A reactor, the reactor being used to contain the dried coal and rock samples; a first soaking device, the first soaking device is connected to the reactor, and the first soaking device is used to deliver deionized water to the reactor, and discharge the deionized water from the reactor after the deionized water soaks the coal rock sample for a first preset time; A second immersion device is connected to the reactor, and the second immersion device is used to transport carbon dioxide to the reactor and convert the carbon dioxide into a supercritical state after the deionized water is discharged from the reactor, and discharge the carbon dioxide from the reactor after the coal rock sample is immersed in the supercritical carbon dioxide for a second preset time.

2. The coal rock soaking system according to claim 1, characterized in that: The first soaking device comprises: A first storage module, wherein the deionized water is arranged in the first storage module, and a liquid outlet of the first storage module is connected to a liquid inlet of the reactor, and a liquid inlet of the first storage module is connected to a liquid outlet of the reactor; A first control module, wherein the output end of the first control module is connected to the input end of the first storage module, and the first control module is used to control the first storage module to deliver the deionized water to the reactor according to a third preset time, and after the first preset time, discharge the deionized water from the reactor according to a fourth preset time.

3. The coal rock soaking system according to claim 2, characterized in that: The first storage module comprises: a first storage tank, wherein the deionized water is arranged in the first storage tank; A first pump body, wherein a liquid inlet end of the first pump body is connected to a liquid outlet end of the first storage tank, and a liquid outlet end of the first pump body is connected to a first interface of the reactor; A second pump body, wherein a liquid inlet end of the second pump body is connected to a second interface of the reactor, and a liquid outlet end of the second pump body is connected to a liquid inlet end of the first recovery tank; Among them, the output end of the first control module is connected to the input end of the first pump body and the input end of the second pump body respectively, and the first control module is used to control the first pump body to start the third preset time, and, after the first preset time, control the second pump body to start the fourth preset time.

4. The coal rock soaking system according to claim 3, characterized in that: The first storage module also includes: A drain pipe is arranged in the reactor, and a liquid inlet end of the drain pipe extends to the bottom of the reactor, and a liquid outlet end of the drain pipe is connected to the second interface of the reactor.

5. The coal rock soaking system according to claim 1, characterized in that: The second soaking device comprises: A second storage module, wherein the carbon dioxide having a preset pressure is arranged in the second storage module, and a liquid outlet of the second storage module is connected to a liquid inlet of the reactor, and an air inlet of the second storage module is connected to an air outlet of the reactor; A heating module, wherein the heating module is connected to the reactor; A second control module, wherein the output end of the second control module is respectively connected to the input end of the second storage module and the input end of the heating module, and the second control module is used to control the second storage module to transport carbon dioxide to the reactor according to a fifth preset time after the deionized water is discharged from the reactor, and control the heating module to heat the reactor according to a preset temperature so that the carbon dioxide is converted into a supercritical state, and, after the second preset time, turn off the heating module and discharge the carbon dioxide from the reactor according to a sixth preset time.

6. The coal rock soaking system according to claim 5, characterized in that: The second storage module comprises: a second storage tank, wherein the carbon dioxide having the preset pressure is arranged in the second storage tank; a third pump body, wherein a liquid inlet end of the third pump body is connected to a liquid outlet end of the second storage tank, and a liquid outlet end of the third pump body is connected to a third interface of the reactor; Among them, the fourth interface of the reactor is connected to the air inlet end of the second recovery tank, and the output end of the second control module is respectively connected to the input end of the third pump body and the input end of the fourth interface, and the second control module is used to control the third pump body to open the fifth preset time, and, after turning off the heating module, control the fourth interface of the reactor to open the sixth preset time.

7. The coal rock soaking system according to claim 5, characterized in that: The heating module comprises: A heating pool, wherein a heating tank is provided in the heating pool, and the reaction kettle is provided in the heating tank; a third storage tank, wherein a heat exchange fluid having the preset temperature is arranged in the third storage tank; A fourth pump body, wherein a liquid inlet end of the fourth pump body is connected to a liquid outlet end of the third storage tank, and a liquid outlet end of the fourth pump body is connected to a liquid inlet end of the heating tank; A fifth pump body, wherein the liquid inlet end of the fifth pump body is connected to the liquid outlet end of the heating tank, and the liquid outlet end of the fifth pump body is connected to the liquid inlet end of the third recovery tank; Among them, the output end of the second control module is connected to the input end of the fourth pump body and the input end of the fifth pump body respectively, and the second control module is used to control the fourth pump body to start for the seventh preset time, and after the second preset time, control the fifth pump body to start for the eighth preset time.

8. The coal rock soaking system according to claim 5, characterized in that: The second soaking device also includes: A sixth pump body, wherein an air inlet end of the sixth pump body is connected to a fourth interface of the reactor; The output end of the second control module is connected to the input end of the sixth pump body, and the second control module is used to control the sixth pump body to start for a ninth preset time after the deionized water is discharged from the reactor.

9. The coal rock soaking system according to claim 5, characterized in that: The second soaking device also includes: A pressure detection unit, wherein a detection end of the pressure detection unit is disposed in the reactor, and an output end of the pressure detection unit is connected to an input end of the second control module; and / or, A temperature detection unit, wherein a detection end of the temperature detection unit is arranged in the reaction kettle, and an output end of the temperature detection unit is connected to an input end of the second control module.

10. The coal rock soaking system according to claim 1, characterized in that: The coal rock soaking system also includes: A fixing device, the fixing device comprising: a supporting net, a plurality of positioning rods and an adjusting ring, the supporting net being arranged in the reactor and used for carrying the coal sample, the positioning rods being inserted into the meshes of the supporting net, and the plurality of positioning rods being distributed at intervals along the circumference of the coal sample, and the adjusting ring being sleeved on the plurality of positioning rods.

Images