32 results about "Bog" patented technology

Carbon dioxide re-liquefaction may be provided by a system capable of receiving a vented boiled off gas stream from a storage vessel at a first compressor; compressing the vented BOG stream at the first compressor into a first compressed BOG stream at a first pressure and a second compressed BOG stream at a second pressure, greater than the first pressure; cooling the first compressed BOG stream in a heat exchanger to produce a liquid stream by: cooling, via a refrigerant unit, the second compressed BOG stream to produce a first cold stream, of a temperature less than that of the first compressed BOG stream; exchanging heat from the first compressed BOG stream against tire first cold stream; and returning the liquid stream to the storage vessel.

A gas supply and carbon capture system, comprising an LNG tank, a BOG compressor set, a dual-fuel engine, a CO2 capture unit, a CO2 compressor, a heat exchanger, and a CO2 storage tank, wherein the LNG tank is used for storing liquid LNG, BOG formed at the inner top of the LNG tank is fed to a cold side of the heat exchanger; the heat exchanger is used for heat exchange between pressurized CO2 and the BOG, cold energy of the BOG is utilized to liquefy the CO2, the obtained liquid CO2 is stored in the CO2 storage tank, and the BOG having a higher temperature after the heat exchange is sent to the BOG compressor set; and the BOG compressor set is used for pressurizing the BOG having a higher temperature and then delivering the BOG to the dual-fuel engine for combustion, and the BOG compressor set employs normal-temperature compressors. By means of the system, the cold energy of the BOG from the LNG tank is fully utilized, and the temperatures of the BOG entering the BOG compressors are caused to meet an inlet temperature requirement of the normal-temperature compressors.

The application provides a method for rapidly distinguishing coal rock sedimentary environment by using ash yield and total sulfur content, comprising the following steps: drawing an ash yield-total sulfur content relationship diagram of coal rock; obtaining ash yield data and total sulfur content data of a coal rock sample to be measured; and explaining the sedimentary environment of the coal rock sample to be measured according to the position area of the ash yield data and the total sulfur content data of the coal rock sample to be measured on the ash yield-total sulfur content relationship diagram. The application distinguishes the sedimentary environment of the coal rock sample to be measured according to the position area of the ash yield data and the total sulfur content data of the coal rock sample to be measured on the ash yield-total sulfur content relationship diagram. The distinguishing method of the application is simple in steps, can clearly and intuitively make an efficient judgment on whether the peat bog type in the coal rock sedimentary environment is affected by marine transgression, the test data is convenient to obtain, is not affected by subjective factors, and the distinguishing result is relatively accurate.

The present invention relates to the production of propagation plugs, primarily blocks of growth medium for the growing of cuttings and seed plants, and of the type consisting of a cylindrical block having an envelope of sheet material and an associated filling of sphagnum or a corresponding substrate material. The sheet material is here a netting or mesh, preferably biodegradable, having a mesh size within the range of 0.1 to 1.5 mm.

FIELD: agriculture.SUBSTANCE: used in growing plants in phytomodules, in “carpet” and container vegetal walls. The substrate for growing plants in vertical phytostructures includes expanded vermiculite, zeolite-containing tripoli from the Khotynetsky deposit, and deoxidized high-moor peat, in the stated quantitative ratio.EFFECT: production of light, nutritious, loose, breathable soil that retains moisture well, contains silicon necessary for plants in a form accessible to them, and has a high ion-exchange capacity.1 cl, 1 tbl, 2 ex

This application provides a method for improving the thermal efficiency of a BOG reliquefaction system, comprising: analyzing the interaction between energy loss and temperature difference values ​​using a support vector regression algorithm to obtain a balance model between energy loss and temperature difference; optimizing the heat transfer temperature difference control parameters using a gradient descent algorithm for the adjusted compression parameter set to obtain an optimized temperature difference control scheme; simulating the overall system efficiency under the interaction of equipment using the optimized temperature difference control scheme to determine whether the simulated efficiency meets a preset standard; if the simulated efficiency does not meet the preset standard, iteratively updating the parameters and adjusting the optimization path according to the energy loss reduction requirement to obtain an iteratively optimized path; applying the iteratively optimized path to the gas reliquefaction system in real time to determine whether the energy consumption cycle is broken, and obtaining the final system thermal efficiency index.

The application provides a method and system for controlling the generation of BOG boil-off gas, comprising the following steps: S1, analyzing and obtaining all influence parameters related to the generation of BOG boil-off gas; S2, screening all influence parameters by using a preset filter to obtain the influence parameters that can be calculated, adjusted and most economical; and S3, taking the screened influence parameters as adjustable parameters to suppress the generation of BOG boil-off gas. The application suppresses the generation of BOG boil-off gas, and reduces the generation of BOG boil-off gas from the source before the recovery of BOG boil-off gas.

The application provides a system for processing excess BOG of an LNG ship, and belongs to the technical field of ships.The system comprises a BOG supply system, an excess BOG utilization system, a flue gas energy storage system, a flue gas energy release system and an inerting system.Based on the complex sailing conditions of a ship, when the LNG ship sails at low load, sails in a maneuvering mode or is anchored, the excess BOG generated in the LNG liquid cargo tank is sent into a boiler for combustion, and then the energy of the excess BOG is converted into the pressure energy of flue gas and stored through a series of devices, so that the problem of waste of the BOG in the excess state is effectively solved; when the ship sails at high load or is unloaded at a discharge port, the energy of the flue gas is released, so that the energy of the BOG is reused.In addition, the stored flue gas can also be used for inerting of low-temperature pipelines and equipment at normal temperature or at a temperature of 0 DEG C to -60 DEG C, so that the inerting cost of the ship is reduced.

The present application relates to the technical field of image processing, in particular to a peat bog information extraction method and system based on GIS remote sensing image. The method collects multi-temporal optical remote sensing image, DEM data and pixel precipitation, pre-processes the multi-temporal optical remote sensing image, and performs semantic segmentation to identify the region of interest; the DEM data is analyzed for elevation characteristics to extract pixel slope and pixel convergence accumulation, the precipitation uniformity is calculated based on the pixel precipitation, and the pixel slope and pixel convergence accumulation are weighted and fused to screen the peat formation potential area; the coupling delay index is calculated based on the time delay of the vegetation green peak and the water supply trend peak value to screen the peat bog suspected area; the area threshold is screened to obtain the target peat bog area and output the result. The present application combines the differences between peat bog and ordinary bog in multi-dimensional characteristics, extracts patches with peat layer characteristics, and avoids misjudgment of peat bog relying on spectral feature recognition.

The utility model discloses a bog reed rhizosphere soil collecting device, and belongs to the technical field of soil collection. The inner net basket is placed in the outer barrel, a gap is formed between the outer side wall of the inner net basket and the inner side wall of the outer barrel, and the outer side wall of the inner net basket is wrapped with a first gauze element; the center column is fixedly connected to the center of the interior of the inner net basket, a plurality of second gauze pieces are fixedly connected between the center column and the inner side wall of the inner net basket, and the inner space of the inner net basket is divided into a plurality of planting areas by the second gauze pieces. The single reed rhizosphere soil collecting device can collect rhizosphere soil of a single reed, facilitates statistics of various growth indexes of individuals, and improves the accuracy of test data.

This disclosure relates to a BOG reliquefaction system, a method for reliquefying BOG in a reliquefaction system, and a method for operating a BOG reliquefaction system. The BOG reliquefaction system includes at least one liquefied natural gas (LNG) container, a BOG preheater, at least one BOG compressor having a BOG compressor cooler, and a BOG recondenser having a refrigeration cycle. The BOG reliquefaction system includes a separate liquid circuit with circulation of a liquid phase heat transfer fluid (HTF) to preheat the BOG from the LNG container before it enters the BOG compressor. The separate liquid circuit includes: a liquid pump configured to pump the HTF; a BOG preheater configured to perform heat exchange between the BOG and the HTF; a BOG recondenser located downstream of the BOG preheater; and a liquid trimming heater located downstream of the BOG recondenser configured to heat the HTF.

The invention discloses a BOG reliquefaction recovery processing method and system, and the BOG reliquefaction recovery processing method comprises the following steps: when the water dew point of BOG raw material gas processed by a raw material gas drying device is smaller than a first preset value, the BOG raw material gas enters a liquefaction cold box device; adjusting a liquefaction cold box device, a refrigerant matching device and a refrigerant compression device, and circularly providing different cold quantities for the multi-level cold sections of the liquefaction cold box through multi-level compression of the refrigerant compression device and multi-level expansion cooling coupling of a corresponding expansion mechanism until the temperature of a backflow refrigerant reaches a first preset value; the treated BOG raw material gas is subjected to multi-level cooling by a liquefaction cold box device to form LNG (Liquefied Natural Gas); and the output quantity of the refrigerant compression device is adjusted to the maximum value, the refrigerant adding quantity is increased, the opening degree of an HV-1 throttling valve is increased, liquid in the denitrification flash evaporation device is controlled to be within a fifth threshold value range, and LNG is subjected to flash evaporation separation through the denitrification flash evaporation device and recycled into the LNG storage tank. The system and the method have the beneficial effects that BOG feed gas is liquefied to form LNG, and rapid recovery of BOG is realized.

This application relates to the fields of remote sensing image processing and ecological environment monitoring technology, and discloses a method for extracting peat bog information based on the dense temporal characteristics of multi-source remote sensing. The method includes acquiring time series of microwave radar and optical vegetation index, performing alignment and cleaning, extracting low-frequency and continuous first-order derivative sequences from the microwave radar to generate temporal basis features; extracting historical delay features for effective optical observation times, splicing the basic state term and derivative modulation product term to generate a bilinear distributed lag observation matrix; performing scale unification processing on the lag observation matrix, constructing a diagonal regularized matrix based on time-lapse attenuation characteristics, and solving for the solution vector; calculating the normalized asymmetric hysteresis intensity and reconstruction quality factor, and combining dual thresholds to determine the output distribution data. This invention incorporates the physical hysteresis effect of hydrological evolution into the computational framework, overcoming multicollinearity and observation sparsity problems, and achieving high-precision extraction of peat bogs.

The utility model relates to the technical field of liquefied natural gas sampling analysis, and provides an LNG sampling system for a filling ship, the system comprises an LNG pipeline and a BOG pipeline, the LNG pipeline is communicated with an LNG sampling assembly, a vaporization assembly and a gas quality analysis assembly in sequence, the LNG sampling assembly is used for being connected to a liquid phase header pipe to take out an LNG sample in the liquid phase header pipe, and the BOG pipeline is used for being connected with the vaporization assembly. The vaporization assembly is used for vaporizing the LNG sample; the BOG pipeline is sequentially communicated with a BOG sampling assembly and a gas mass analysis assembly, and the BOG sampling assembly is used for being connected to a gas phase header pipe so as to take out a BOG sample in the gas phase header pipe; and the gas quality analysis assembly is used for respectively carrying out online analysis on the gasified LNG sample and BOG sample. According to the utility model, the BOG pipeline is arranged outside the LNG pipeline, so that the LNG sample and the BOG sample can be sampled and analyzed at the same time, and the metering error caused by only considering the single-state gas can be avoided.

The invention discloses an efficient and energy-saving ammonia gas replacement and recovery system, and relates to the technical field of ship construction. The system comprises an ammonia storage tank, an ammonia supply pipeline and a BOG recondensation pipeline, the ammonia storage tank is connected with the ammonia supply pipeline, and the ammonia supply pipeline comprises a low-pressure pump, a front buffer tank, a BOG cooler, a high-pressure pump, a liquid ammonia heater, a valve group control unit and a host which are sequentially connected; the ammonia storage tank is connected with the BOG recondensation pipeline, and the BOG recondensation pipeline comprises an ammonia vapor buffer tank, a BOG compressor, a BOG cooler and a liquid ammonia recovery buffer tank. The BOG cooler is arranged in front of the high-pressure pump of the ammonia supply pipeline, ammonia vapor in the BOG recondensation pipeline is deeply cooled through cold energy of liquid ammonia in the ammonia supply pipeline, meanwhile, the liquid ammonia is heated through heat energy of the ammonia vapor in the BOG recondensation pipeline, and the energy utilization rate of the ammonia vapor recovery process of the ship ammonia tank is effectively increased.

When the ventilation mast for the LNG ship is used, the lifting driving piece is adjusted according to the concentration of BOG, so that the lifting driving piece drives the lifting cover to move in the direction close to or away from the main body, and the size of a discharging channel formed between the lifting cover and the main body is adjusted so as to adapt to the concentration of the BOG, and air of the BOG can be rapidly discharged to the outside conveniently. Meanwhile, when the wind power in the air is large, the lifting cover is driven to be close to the main body through the lifting driving piece so as to shrink the discharging channel, so that the discharging channel forms a narrow pipe effect under the action of the wind power, the air pressure at the discharging channel is lower than the air pressure in the air discharging channel, and then the discharging efficiency of BOG is improved.

The invention discloses a coal rock distribution prediction method and device, electronic equipment and a storage medium. The coal rock distribution prediction method comprises the following steps: determining target topographic factor information of a micro-ancient landform formed by a target coal rock stratum, the topographic factor information being a micro-ancient landform shape represented by a stratum inclination angle and a stratum curvature, the topographic factor information can be used for representing peat marsh facies characteristics which are required by the coal rock stratum in a sedimentary environment and have a positive promotion effect on coal rock stratum deposition; determining seismic wave impedance corresponding to the target coal rock stratum; and carrying out seismic inversion based on the target terrain factor information and the seismic wave impedance corresponding to the target coal rock stratum, and predicting to obtain a coal rock distribution result of the target coal rock stratum. According to the scheme, the seismic inversion is constrained and verified by the topographic factor information of the micro-ancient landform and the seismic wave impedance of the target coal rock stratum, and the accuracy of a coal rock distribution prediction result is improved.

The invention relates to a method (100) for reliquefying a BOG stream (B) drawn from a storage tank (T) for liquefied gas, comprising the steps: a1) extracting liquid (F1) from a liquid phase of the storage tank (T), a2) evaporating the liquid (F1) to produce an evaporated liquid (F2), b) introducing the evaporated liquid (F2) into the BOG stream (B) to generate a mixed BOG stream (BM), c) compressing the mixed BOG stream (BM) to a predetermined final compression pressure to produce a compressed mixed BOG stream (BMv), d) condensing the compressed mixed BOG stream (BMv) to produce a condensed compressed mixed BOG stream (BMvk), in particular with a condenser (46).

This application discloses an LNG storage tank BOG liquefaction and recovery system and its control method. The system includes an LNG storage tank, an LNG buffer tank, an LNG pump, and a chiller. The LNG pump is installed inside the LNG buffer tank. When BOG needs to be recovered from the LNG storage tank, the chiller cools and liquefies the BOG transported from the LNG storage tank and returns it to the LNG storage tank, thus realizing the recovery of BOG gas in the LNG storage tank. During the BOG recovery process, when it is necessary to maintain the subcooling of the LNG storage tank, the chiller cools the LNG transported from the LNG storage tank. The cooled LNG is then returned to the LNG storage tank, mixed with the LNG in the LNG storage tank, and further reduces the temperature of the LNG in the LNG storage tank to maintain the subcooling of the LNG storage tank. The entire system of this application has a simple structure and can liquefy and recover BOG from the LNG storage tank while maintaining the subcooling of the LNG storage tank.

A method for managing BOG comprising providing one or more receiving tanks, each receiving tank comprises a condensation reserve amount of liquefied gas and a bottom distribution header. The header comprises a length of at least 10% of a length of the receiving tank and (ii) a plurality of openings arranged along the length of the distribution header. At least one opening is arranged per meter along the length of the bottom distribution header. The method further comprises providing boil-off-gas (BOG) to at least one receiving tank via the plurality of openings of the header; recondensing the BOG in the at least one receiving tank using the condensation reserve amount of liquefied gas; and terminating the provision of the BOG before pressure of the at least one receiving tank exceeds a pressure threshold of that tank.

The invention provides a BOG (Boil Off Gas) treatment system. The BOG treatment system comprises a tank body, extraction equipment and BOG treatment equipment, the tank body is used for storing liquefied natural gas. And one end of the extraction equipment is communicated with the interior of the tank body. The BOG treatment equipment is provided with a first channel and a second channel which are communicated with each other, an inlet of the first channel is connected to the extraction equipment, and an inlet of the second channel is communicated with the interior of the tank body. The extraction equipment is used for extracting the liquefied natural gas in the tank body and supplying the extracted liquefied natural gas to the BOG treatment equipment, and in the process that the extraction equipment extracts the liquefied natural gas in the tank body, at least a fluid pressure difference is formed between the inlet of the second channel and the interior of the tank body, so that BOG in the tank body flows into the second channel. According to the BOG treatment system, in the process that the extraction equipment extracts the liquefied natural gas in the tank body, the BOG in the tank body can be extracted at the same time through the pressure difference, the pressure formed by the BOG in the tank body is effectively balanced, and the use safety of the tank body is ensured.

The invention discloses a coupled natural gas supply device for BOG reliquefaction and a ship. The natural gas supply device comprises a storage bin, a first pump, a buffer tank, a compressor and a condenser; the first pump is communicated to the storage bin and a first tank inlet of the buffer tank; the compressor communicates with a gas outlet of the storage bin; a first condensation inlet of the condenser is communicated with a compression outlet of the compressor, a first condensation outlet of the condenser is communicated with a second tank inlet of the buffer tank, a second condensation inlet of the condenser is communicated with a first tank outlet of the buffer tank, and a second condensation outlet of the condenser is used for being communicated with a gas supply device. Therefore, the cold energy of the mixed LNG is used for cooling the BOG, so that the BOG is liquefied, the liquefied BOG and the liquefied LNG are mixed to form the mixed LNG, then the mixed LNG is conveyed to the condenser to release the cold energy, and the mixed LNG after the cold energy is released is provided for the gas utilization equipment, so that the cold energy of the LNG can be effectively utilized, a device for providing a refrigerant does not need to be additionally arranged, and the ship adopting the natural gas supply device is simple in structure.

The invention relates to a method for preparing a BOG framework type zeolite, in particular to a direct synthesis method for preparing a BOG framework type aluminosilicate zeolite by using 5-azaindole cation as a structure-directing agent. The present disclosure also relates to small crystalline forms of aluminosilicate zeolites of the BOG framework type and uses thereof.

The application belongs to the technical field of BOG processing, and particularly discloses a BOG recondensation device with controllable flow and a recondensation process.The BOG recondensation device has excellent precooling function, and the inlet steady flow straight pipe section and the BOG inlet chamber jointly form a shell-and-tube structure, so that BOG can be efficiently precooled before being mixed with LNG, and BOG with a lower temperature is more easily condensed and liquefied when directly contacting with LNG in a gas-liquid mixing condensation chamber, so that the recondensation efficiency is improved;the combination of the multi-hole plate and the hole plug realizes controllable flow adjustment, and improves the anti-interference ability and applicable range of the recondenser;the multi-hole and multi-nozzle design significantly increases the contact area of LNG and BOG in the gas-liquid recondensation mixing chamber, and strengthens the turbulent disturbance between BOG and LNG, so that the BOG recondensation efficiency is greatly improved.The BOG recondensation process can simplify the process flow, fully utilize the pressure energy and cold energy of LNG, and greatly reduce energy consumption, so that the process has good energy-saving and emission-reducing effects.

The invention relates to a normal-temperature start-up circulating pre-cooling process method for a low-temperature BOG compressor. The process method comprises the steps that an inlet pipeline of the compressor is pre-cooled through low-temperature BOG; before the compressor is started, a valve is preset; the BOG compressor in the normal temperature state is started, the low-temperature BOG is sucked in and flows through a compressor cylinder body to be cooled, the BOG subjected to temperature rise and pressure rise returns to a BOG header pipe in front of the BOG desuperheater through the backflow valve, low-temperature BOG is formed after temperature reduction and separation again, and the low-temperature BOG is sucked by the compressor to form a circulating cooling loop; and the BOG compressor is put into operation. The system has the beneficial effects that by arranging the pressure regulation discharge pipeline and the compressor outlet backflow pipeline and controlling corresponding valves, BOG which is compressed by the first-stage air cylinder of the compressor and is heated and boosted is subjected to pressure relief and cooling through the pressure regulation discharge pipeline, and the situation that the BOG at the outlet of the compressor is too high in temperature, and a torch is discharged is avoided.

This invention discloses a swamp sampling device for geological exploration, comprising an outer shell, a refrigerated box, and two tracks. The refrigerated box is fixedly connected to the left side of the outer shell. The two tracks are symmetrically arranged front and rear and are both mounted on the outer shell. An opening is provided at the bottom of the outer shell, and a feed inlet is provided on the right side of the refrigerated box. An opening and closing cylinder is installed on the front side of the outer shell near the left side, and a pull rope is fixedly connected to the power output shaft of the opening and closing cylinder. An opening and closing plate is hinged on the right side of the refrigerated box near the bottom. Through the cooperation of components such as the component mounting plate, active motor, limiting plate, threaded cylinder, limiting rod, limiting ring, inclined plate, moving block, central shaft, meshing block, welding rod, pressure block, hinge block, swing rod, and movable spring, this invention enables the pressure block to slowly push the sample out of the inner cavity of the thin-walled soil sampler when the sample is brought into the inner shell, thus avoiding shearing damage to the sample.

The application relates to a BOG flow control system of a tank group receiving station, comprising: a tank pressure controller for monitoring the pressure of an LNG storage tank and controlling a BOG compressor according to the pressure value; the BOG compressor is arranged in a BOG pipeline communicated with the LNG storage tank, and is used for receiving BOG of the LNG storage tank, processing the BOG and then conveying the BOG to a recondenser; the BOG compressor comprises a centrifugal compressor set and a reciprocating compressor set in parallel, the centrifugal compressor set is used for covering a preset basic flow, and the reciprocating compressor set is used for covering a peak flow outside the basic flow in cooperation with the centrifugal compressor set. The application can meet the demand of increasing BOG processing capacity, and meanwhile, the economy of investment is ensured.

The utility model belongs to the technical field of LNG (Liquefied Natural Gas) production and storage, and particularly relates to an energy-saving BOG (Boil Off Gas) recovery device. In order to solve the problems of resource waste, environmental pollution, high energy consumption, limited application scene and the like caused by the existing BOG gas utilization mode, the BOG gas generated by the LNG storage tank is subjected to pressure control by a pressure regulating valve, then is sent to an air bath type vaporizer for reheating and pressurized by a compressor, and is divided into three paths, one path is sent to an incinerator device to be used as combustion accompanying gas, and the other path is sent to an LNG storage tank to be used as combustion accompanying gas. One path is recycled from a raw material gas pipe network to improve the resource utilization efficiency, and the other path is used as emergency vent gas from a torch system.

The invention relates to a method for reliquefying BOG, said BOG containing a volatile fraction, said method having the following steps: a) compressing a BOG stream, wherein said BOG stream is discharged from a final compression stage as a final compressed BOG stream having a final pressure; b) condensing said final compressed BOG stream in order to obtain an at least partially condensed final compressed fluid stream; c) providing a fluid receiving vessel having a fluid stream inlet and a fluid stream outlet, wherein the position of said fluid stream outlet is chosen such that it is located above a preset fluid receiving volume; d) introducing the fluid stream from step b) into said fluid receiving vessel through said fluid stream inlet; e) determining a desired liquid level for said fluid receiving vessel such that said desired liquid level is at the height of or exceeds by a preset measure the upper edge of said fluid stream outlet; f) determining an upper limit final pressure for said final compression stage; g) measuring the liquid level in said fluid receiving vessel; h) measuring said final pressure; i) conducting a fluid stream from the fluid receiving vessel through said fluid stream outlet; j) cooling the fluid stream from step i) to a temperature corresponding to the saturation temperature of said fluid stream at a pressure below said final pressure in order to condense the gaseous fraction of said fluid stream; k) diverting said cooled fluid stream if the measured liquid level is at least equal to said desired liquid level and / or if the measured final pressure is equal to said limit final pressure. The invention also relates to a device for carrying out said method.