The invention provides a hydrate sediment CT triaxial testing device, and belongs to the technical field of geotechnical engineering foundation physical property measurement. Aiming at the deficiencyof the invention of a visualization testing device for natural gas hydrate sediment mechanical properties, the hydrate sediment CT triaxial testing device is subjected to redesigning and optimization,under the premise that the hydrate reservoir static force, the dynamic properties and the creep property can be obtained, the stability in the scanning rotating process of a triaxial apparatus, the hydrate sample temperature control accuracy and the penetrating property of X-rays of a triaxial apparatus pressure chamber are improved, the optimal CT imaging effect is obtained, and powerful hardware support is provided for the verification of the reservoir deformation mechanism in the decomposition process of a hydrate.

Hydrate sediment CT triaxial testing device

The invention relates to a visual experiment device of wall adhesion mechanical properties of hydrate and a working method of the visual experiment device The visual experiment device comprises a circulating refrigeration system, a testing unit system, a microcosmic operation system and a microscopic observation system, wherein the testing unit system comprises a normal-pressure visual reaction device, a normal-pressure reaction groove, a liquid inlet, a liquid outlet and a testing unit element; the normal-pressure reaction groove is arranged on one side wall of the visual reaction device; the liquid inlet and the liquid outlet are formed in the side wall in a communicating manner; a visual window is further arranged on the side wall; the testing unit element is arranged in the normal-pressure reaction groove; the testing unit element comprises a solid metal block and transparent quartz frames; a plurality of transparent quartz frames are arranged on the solid metal block By adopting the visual experiment device provided by the invention, generation, growth and deposition conditions of cyclopentane hydrate on a wall can be researched and monitored relatively well, and condition limitation that the hydrate only can be generated under a high-pressure environment is eliminated, so that an adhesion force of the cyclopentane hydrate generated on the wall is more accurately and directly measured

Visual experiment device of wall adhesion mechanical properties of hydrate and working method of visual experiment device

The invention relates to a visualization device and method for multidirectional observation of hydrate generation and decomposition. The visualization device comprises a low-temperature constant-temperature control system, a normal-pressure visualization reaction device, a temperature acquisition apparatus and a CCD imaging system, wherein the normal-pressure visualization reaction device comprises a temperature control circulating tank, a reaction tank, a circulating liquid inlet and a circulating liquid outlet; the reaction tank is arranged in the temperature control circulating tank; the tank wall of the temperature control circulating tank is communicated with the circulating liquid inlet and the circulating liquid outlet; a two-layer organic glass window is arranged on one side tank wall of the reaction tank, and comprises an observation window and an organic glass window in turn from inside to outside; the observation window and the organic glass window are both made of organic glass. According to the visualization device and method provided by the invention, the two-layer organic glass window is adopted, and is totally closed inside, air is dry, and the heat conductivity is low; the temperature of the outer-layer organic glass is close to room temperature, and the problem of water mist is solved.

Visualization device and method for multidirectional observation of hydrate generation and decomposition

The invention discloses a mining method and mining device for a sea-phase natural gas hydrate The mining method comprises the following steps that (1), a fixing pipe is constructed after a vertical well is constructed, a mining well is arranged in the center of the fixing pipe, and an uniformly-mixed mixture fills the portion between the inner wall of the fixing pipe and the outer wall of the mining well; (2), a self-excitation oscillating jet nozzle enters the mining well along the vertical well and reaches a specified position through an orifice on the mining well so as to spray the mixture, so that the mixture is uniformly crushed to form artificial fractures; (3), under the corresponding temperature, pressure reduction mining and hydrate decomposition gas production are carried out; and (4), gas-liquid mixture produced by the mining well is separated in a gas-liquid separation device to obtain liquid and gas, and the obtained liquid and gas are collected The mining method has theadvantages of stable pressure reduction mining, improvement of mining efficiency, recovery of high-concentration natural gas, automatic operation and remote control, and can provide guidance for exploitation of the sea-phase natural gas hydrate

Mining method and mining device for sea-phase natural gas hydrate

The invention provides a hydrate phase change process visualization CT (computer tomography) device based on a high pressure throttling temperature control technology, which belongs to the technical field of basic research on hydrates. High pressure gas enters a temperature control pool through a gas pump and a low temperature probe; the high pressure gas can be used for realizing temperature control through throttling expansion heat absorption of the low temperature probe; the temperature control pool is connected with a reaction pool by a self-operated pressure regulating valve; the pressurein the reaction pool can be controlled by the self-operated pressure regulating valve, so that the generation and decomposition of methane hydrate can be controlled. An outlet gas pump is connected with the temperature control pool, so as to control the pressure in the temperature control pool. The generation and decomposition process of the methane hydrate is scanned by X-ray CT timely. A high pressure gas throttling low temperature device is combined with the X-ray CT, so that the temperature can be controlled by throttling expansion of high pressure methane, and the problem that the temperature is relatively difficult to control as a reaction kettle rotates in the X-ray CT scanning process is solved. A three-dimensional structure of the generation and decomposition process of the methane hydrate on the surface of a porous medium can be visually observed through combination with the X-ray CT scanning, so as to provide basic data for a research on numerical simulation of generation and decomposition of the hydrate.

Hydrate phase change process visualization CT (computer tomography) device based on high pressure throttling temperature control technology

The invention relates to a device and a method for measuring the growth speed and the effective volume of hydrate on the basis of microfocus X ray CT and belongs to the field of new energy and new materials. The device comprises a microfocus X ray CT scanning system, a temperature control and detection system, a reactant addition system and a reaction kettle. The microfocus X ray CT is used for dynamically shooting the hydrate generation process of a single waterdrop, the growth speed and the effective volume of the hydrate can be accurately calculated, understanding on the hydrate generation process is deepened, and important guiding significance is produced for hydrate development, hydrate flowing safety and a hydrate application technology.

Device and method for measuring growth speed and effective volume of hydrate on basis of microfocus X ray CT

The invention belongs to the field of natural gas hydrate extraction, in particular to a natural gas hydrate replacement method for combining hot seawater injection methane extraction enhancement and carbon dioxide storage. The method comprises the steps that firstly, after well drilling is completed, hydrate reservoir pressure is reduced, and natural gas hydrate around a shaft is located in a metastable state; then the shaft is utilized for injecting carbon dioxide into a reservoir, and a replacement reaction occurs on a hydrate reservoir extraction shallow layer close to the shaft; the shaft is utilized for injecting carbon dioxide and hot seawater into the reservoir, dense carbon dioxide and methane mixed hydrate formed through the replacement reaction is decomposed, and methane in small holes of the hydrate incapable of being replaced is developed; finally, injection of the hot seawater is stopped, carbon dioxide is continuously injected into the reservoir, the carbon dioxide is migrated to a hydrate reservoir extraction deep layer, and more hydrate is promoted to be subjected to the replacement reaction. The aims of safely and efficiently extracting the hydrate and storing the carbon dioxide to relieve the greenhouse effect are achieved at the same time.

Natural gas hydrate replacement method for combining hot seawater injection methane extraction enhancement and carbon dioxide storage

The invention relates to a gas hydrate method sewage treatment system belonging to the field of environmental science and engineering. The gas hydrate method sewage treatment system comprises two levels of treatment facilities and comprises a first-level treatment water mixture-sewage transportation unit, a first-level treatment hydrate generation decomposing unit, a secondary-level treatment water mixture-sewage transportation unit and a secondary-level hydrate generation decomposing unit. Hydrate decomposition water after first-level treatment is used as a raw material of secondary-level treatment, and pollutant removal efficiency is improved through two-level treatment. The gas hydrate method sewage treatment system is suitable for large-scale treatment of domestic wastewater and industrial wastewater, inorganic pollutant and organic pollutant can be effectively removed simultaneously, operating cost is reduced due to cyclic utilization of water mixture, heat and mass transfer of hydrate generation process is strengthened due to arrangement of a spray device and a stirrer, and the hydrate growth velocity is increased. The system and the method are reasonable and compact in structure, industrial production requirement is met, operation process is stable and reliable, cost is low, energy is saved and environment is protected.

Gas hydrate method sewage treatment system

The invention discloses a pipeline blockage detection system based on a low-frequency sound wave, belongs to the technical field of pipeline detection, and aims at achieving the purpose of more accurate condition expression of pipeline blockage detection for blockage The pipeline blockage detection system based on the low-frequency sound wave comprises a waveform generator, a low-frequency electroacoustic transducer, a microphone and a signal resolution device, wherein the waveform generator is used for generating an excitation signal, the excitation signal is transmitted to the low-frequency electroacoustic transducer, the excitation signal is converted to a low-frequency pulse sound wave signal by the low-frequency electroacoustic transducer, and transmitted into a pipeline to form anincident wave and a reflected wave in the pipeline; and the microphone receives the sound wave signal in the pipeline and transmits the sound wave signal to the signal resolution device, the signal resolution device resolves the sound wave signal to reflect the position of a blocking object The pipeline blockage detection system based on the low-frequency sound wave has the following effect: theoccurrence position and the degree of blockage can be timely detected in an initial phase that the pipeline is incompletely blocked

Pipeline blockage detection system based on low-frequency sound wave

The invention provides a system and a method for desorbing and enriching heavy metal ions in an aquo-complex method solution, and belongs to the field of environment-friendly engineering. The heavy metal ion desorbing and enriching system comprises an aquo-complex generation subsystem, a vacuum filtration subsystem, a centrifugal separation subsystem and an aquo-complex decomposition subsystem. The system and the method are applicable to desorption and enrichment of heavy metals in solutions for scientific study and industrial application; due to generation and decomposition of an aquo-complex, desorption and enrichment of the heavy metal ions of the solutions are achieved; due to adoption of decomposition liquor, desorption of the heavy metal ions is achieved; due to adoption of a residual liquid, enrichment of the heavy metal ions is achieved; the method is relatively high in desorption efficiency and universality, and multiple heavy metal ions can be desorbed simultaneously. Meanwhile, the operation process is stable and reliable, relatively low in energy consumption and high in feasibility.

System and method for desorbing and enriching heavy metal ion in aquo-complex method solution

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