43 results about "Coal slurry" patented technology

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The application discloses a production process of potassium fulvate of mineral origin, which uses weathered coal and / or lignite as raw materials, and comprises the following steps: raw coal slurry preparation, ultrasonic-assisted weak-alkali low-temperature closed-loop extraction, double-stage centrifugal separation and solar drying system drying to prepare high-activity potassium fulvate of mineral origin. The extraction is carried out at 45-55 DEG C, pH 11-12, ultrasonic power 3-5 kW and frequency 25-30 kHz for 30-60 min, and the extraction rate of fulvic acid is 65%-75%; the solar drying system is configured with an automatic turning and throwing system, a circulating ventilation system and a meteorological linkage system, and the crude liquid with a water content of 75% is dried to 15% in the whole process without waste water and carbonization. The application has the advantages of high extraction rate, low energy consumption, short time, high product activity, high small molecule content, no residue in full water solution at 25 DEG C and suitability for large-scale clean production.

The utility model discloses an eccentric type rotary stirring coal slime processing tank body equipment, it includes tank body, eccentric drive mechanism and stirring subassembly. Tank body is rectangular box structure, is equipped with stirring chamber in the inside, eccentric drive mechanism drives stirring subassembly along non central axis eccentric rotation movement through eccentric wheel and transmission rod, stirring subassembly includes main stirring arm and vice stirring arm, and vice stirring arm can be unfolded or gathered with main stirring arm to adapt to different coal slime characteristics. The application changes stirring force distribution through eccentric rotation, avoids stirring dead angle, improves stirring uniformity, sets up guide vane and auxiliary stirring blade simultaneously and optimizes flow path and shear force distribution, reduces energy consumption. The equipment structure is reasonable, and it is convenient to manufacture and maintain, has higher practicality and popularization value.

This invention discloses a low-temperature resistant composite flotation reagent for coal preparation and its preparation method, specifically relating to the field of flotation technology. The reagent is formed by emulsification of a composite collector, a composite frother, and an aqueous phase. The composite collector contains kerosene, n-dodecane, oleic acid, dimer acid, surfactant components, and low-temperature stabilizing components. The composite frother contains terpineol, pine oil, sec-octanol, and sodium α-olefin sulfonate, etc. Through compounding and synergistic effects, high-speed shear emulsification, and high-pressure homogenization, the obtained reagent exhibits good dispersibility and stability at -5 to 15°C, and can improve the flotation efficiency, clean coal yield, and combustible gas recovery rate of fine coal slime and high-ash, difficult-to-separate coal slime without heating the coal slurry.

A solvent extraction plant includes a solvent tank. A coal slurry tank is configured to receive a solvent from the solvent tank receive coal from a coal source and form a feed slurry from the solvent and the coal. A solvent extraction reactor is configured to receive the solvent from the solvent tank, receive the feed slurry from the coal slurry tank, and form a solution from the feed slurry. The solution includes a solvent and a dissolved coal species. A solvent extraction distillation column is configured to receive the coal extract from the evaporator, provide a coal extract to an extract collection tank. The solvent extraction reactor may include a co-current extraction reactor, a countercurrent extraction reactor, or a combination of co-current and countercurrent extraction reactors.

This invention relates to the field of automation control technology and discloses an intelligent control system for dynamic dosing of flocculant in coal slurry water based on photosensitive sensing. The system includes a state sensing module, an intelligent decision-making module, an automatic execution module, and a closed-loop optimization module. The system continuously monitors the concentration of coal slurry water in real time using a photosensitive sensor and feeds the sensing signal back to a programmable logic controller (PLC). The PLC compares and calculates the received turbidity signal with internal preset thresholds and control logic, automatically generating control commands and dynamically adjusting the start-up, shutdown, and operating frequency of the dosing pump, thereby achieving a match between the flocculant dosage and the real-time changing concentration of the coal slurry water. Simultaneously, the system integrates an automatic dosing function, automatically replenishing water and discharging material from the mixing tank through liquid level control, and uses timed compressed air purging to solve condensation interference on the photosensitive sensor. This invention improves the system's response speed and control accuracy to fluctuations in operating conditions.

This invention relates to the field of coal preparation and mineral processing equipment technology, and provides a closed-circuit flotation device and method for coal slime with an annular multi-sector adjustable suction trough. The device includes a tank body, which is installed inside a flotation machine and carries the coal slurry. Flow stabilizing blades are mounted on the tank body. An annular multi-sector adjustable suction trough is positioned between several flow stabilizing blades. The annular multi-sector adjustable suction trough is circumferentially divided into several independent sectors. Each sector sequentially includes a reflux inlet, a static mixing component, an ejector aeration assembly, and an adjustable slit outlet. The inner side of the annular multi-sector adjustable suction trough accommodates the impeller-stator stirring zone of the flotation machine. The stabilizing zone is located below the annular multi-sector adjustable suction trough, and the adjustable slit outlet faces the impeller-stator stirring zone. The annular multi-sector adjustable suction trough coal slime closed-circuit flotation device and method provided by this invention achieves circumferentially uniform feeding through the annular multi-sector structure and utilizes ejector aeration to achieve low-shear reactivation of the reflux slurry.

This utility model relates to the technical field of coal processing and mineral processing equipment, and discloses a high-efficiency and energy-saving coal flotation machine device, including a flotation tank. An installation plate is fixedly connected to the upper surface of the flotation tank. An agitator is fixedly installed on the upper surface of the right part of the installation plate, and an agitator motor is fixedly installed on the upper surface of the upper surface of the left part of the installation plate. An agitator belt is movably sleeved on the outer surface of the output shaft of the agitator motor. The end of the agitator belt away from the agitator motor is sleeved on the outer surface of the agitator. This utility model achieves self-cleaning by using the centrifugal force and gravity generated by the rotation of the equipment itself through a combination structure of friction blocks and springs built into the scraper. No additional power source is required. Friction heats up the surface temperature of the scraper, reducing the viscosity of the coal slurry. Combined with airflow purging and mechanical scraping, a triple self-cleaning mechanism is formed, which significantly reduces the frequency of manual cleaning and equipment downtime, and improves the efficiency of coal flotation.

This utility model relates to the field of coal processing technology, and in particular to a coal slurry water treatment device for coal washing and beneficiation. It includes a treatment tank, with a fixed plate fixedly connected to the upper front part of the treatment tank. A stirring device is fixedly connected to the right end of the side tank. A water inlet pipe and a water outlet pipe are fixedly connected to the upper and lower left ends of the treatment tank, respectively. A slot is formed at the upper end of the treatment tank, and a filter device is fixedly connected to the lower end of the fixed plate. The stirring device includes a drive motor, the output end of which passes through the side tank and is fixedly connected to a main gear. This coal slurry water treatment device for coal washing and beneficiation improves filtration efficiency through a liftable honeycomb filter and an easy-to-clean structure, and enhances mixing uniformity and reagent utilization through a wave-shaped annular stirring blade and a stable transmission structure, thus efficiently treating coal slurry water.

The application discloses a method for preparing a water coal slurry additive by using styrene tar, and the styrene tar generated by a PO / SM device in a park is subjected to a sulfonation reaction with waste sulfuric acid generated by a hydrogen chloride oxidation device, and then is subjected to a hydrolysis reaction, a condensation reaction and a neutralization reaction, so that a high-efficiency water coal slurry additive is obtained. Compared with traditional additives such as lignin sulfonic acid and naphthalene, the water coal slurry additive has the advantages of better viscosity reduction effect and better fluidity, can be used for preparing high-concentration water coal slurry, realizes resource recycling of waste, reduces carbon emission and reduces environmental pollution.

The application provides a method for improving the yield of coal direct liquefaction oil by adding alkanes, and belongs to the technical field of coal direct liquefaction.The application provides a method for improving the yield of coal direct liquefaction oil by adding alkanes, which comprises the following steps: mixing coal samples, hydrogen-donor solvents, catalysts, catalyst auxiliaries and alkanes, and then performing a liquefaction reaction to obtain coal direct liquefaction oil.The application adjusts the hydrogen-donating capacity of the solvent by adding alkanes on the basis of the original hydrogen-donor solvent, so that the purpose of improving the yield of liquefaction oil is achieved; the method improves the solubility of hydrogen in the oil coal slurry on the one hand, and effectively inhibits the polycondensation reaction of coal pyrolysis free radicals by utilizing the cracking behavior of alkanes in the reaction process, so that the yield of liquefaction oil is significantly improved.

This invention discloses a composite coating material, construction process, and application for coal mine transportation pipelines. The composite coating material, by mass fraction, comprises the following components: 30%-35% epoxy resin, 10%-15% polytetrafluoroethylene, 5%-8% nano-aluminum nitride, 8%-12% curing agent, 2%-4% coating additives, and the balance being solvent. This composite coating exhibits an adhesion strength ≥5 MPa, ensures no freezing or blockage of the pipeline under -30℃ low-temperature conditions, reduces scaling rate by more than 90% compared to ordinary pipelines, and extends pipeline service life by more than 3 times. It is suitable for on-site maintenance and construction of coal mine water-coal slurry transportation pipelines and mine water return pipelines in severely cold regions such as Northeast and Northwest China, possessing extremely high practical value and promising application prospects.

The application provides a piston rod for a coal slurry conveying diaphragm pump, which comprises a piston rod mounting section and a piston sealing structure mounting section arranged in sequence from left to right, and a left side end surface of the piston rod mounting section is provided with a left protruding outer hexagonal boss, the center of the outer hexagonal boss coincides with the center line of the piston rod mounting section; a threaded center hole structure is arranged on the left end surface of the outer hexagonal boss, and the threaded center hole structure comprises a tapered hole and a threaded hole connected to the right end surface of the tapered hole; the tapered hole is tapered, and the inner diameter of the tapered hole decreases from the left end surface of the outer hexagonal boss to the left end surface of the threaded hole; the threaded hole is a cylindrical structure, the inner diameter of the threaded hole is equal to the diameter of the right end surface of the tapered hole; and the inner ring surface of the threaded hole is provided with threads. The piston rod for the coal slurry conveying diaphragm pump is provided with a threaded center hole structure on the end surface of the piston rod, and stress is borne through the threaded center hole structure during the mounting or dismounting of the piston rod, so that the mounting efficiency and process reliability of the piston rod are greatly improved.

This application discloses a silo coal slurry water collection device. In the silo coal slurry water collection device, the floor of the silo distribution room is equipped with a collection trough for collecting coal slurry water. A conveyor pump is installed inside the collection trough, and an insulation section is provided on the outside of the collection trough. A belt conveyor is installed on a trestle, the trestle surface is inclined, the top of the trestle surface is located inside the silo distribution room, and the bottom of the trestle surface extends to the drive chamber of the belt conveyor. A receiving section is located between the top and bottom of the trestle surface. A conveying pipe connects the conveyor pump and the receiving section, and a one-way control valve is installed on the conveying pipe to ensure that the coal slurry water in the collection trough is transported unidirectionally to the receiving section. The silo coal slurry water collection device provided by this application solves the safety problems in the prior art where coal slurry water in the silo distribution room freezes in low-temperature environments when flowing to the bottom of the silo through the downpipe, causing the downpipe to burst or fall. It maintains the normal flushing requirements of the silo coal slurry water and ensures that the environmental dust content meets environmental protection requirements.

This invention discloses a powdered reagent dosing device and method for treating coal slurry wastewater. The powdered reagent dosing device includes a dispensing mechanism, which includes a housing containing three sequentially connected dispensing units. Each dispensing unit includes a tank, and a scraper is installed on the inner bottom wall of the tank. The scraper includes a pair of scraping arms that adhere to the side wall of the tank, and a cross arm is connected to the bottom of the pair of scraping arms. A scraping motor is fixedly connected to the bottom of the outer side of the tank, and the output shaft of the scraping motor passes through the bottom wall of the tank and is fixedly connected to the end face of the cross arm away from the scraping arm. By setting up the scraping arms, some of the deposited powdered reagent and the powdered reagent adhering to the tank wall are stirred and melted, and added back to the reagent to be prepared, solving the problems of insufficient accuracy in the amount of powdered reagent added and unstable reagent concentration output in the prior art.

This invention discloses a solid-liquid non-full pipe flow monitoring system and method, relating to the field of mineral processing engineering technology. The solid-liquid non-full pipe flow monitoring system includes a measurement unit, a data processing unit, and a linkage control unit. The measurement unit is used to collect the flow velocity signal, liquid level signal, and temperature signal of coal slurry water in the pipeline. The data processing unit is electrically connected to the measurement unit and is used to receive and process the flow velocity signal, liquid level signal, and temperature signal, and calculate the real-time flow rate of coal slurry water in the pipeline according to a preset program and formula. The linkage control unit is electrically connected to the data processing unit and is used to compare the real-time flow rate with a set value and output a control signal to the actuator to adjust the flow rate. This solves the problem of non-full pipe flow measurement, automatically adjusts the flow rate, stabilizes the production process, has low maintenance costs, and enables unattended operation.

This utility model discloses a plate and frame filter press for coal preparation, belonging to the field of coal slurry water treatment technology. It includes a frame with two sets of crossbeams fixedly connected to it. A base plate is also fixedly connected to the bottom of the frame. A filter pressing mechanism is installed at the top of the frame, and a collection box is placed on top of the base plate. A crushing mechanism is installed between the filter pressing mechanism and the collection box. The crushing mechanism includes a guide shell fixedly connected between the frames. The guide shell is funnel-shaped with a small opening facing downwards. Two sets of rotating shafts are rotatably connected between the inner walls of the guide shell. Crushing rollers are fixedly connected to the rotating shafts. The crushing mechanism also includes a power component for driving the two crushing rollers to rotate. The beneficial effect is that by driving the two rotating shafts to rotate the crushing rollers through the power component, the falling filter cake is crushed, reducing the space occupied by the filter cake and improving the utilization rate of the collection box.

This utility model provides a coal sludge dredging machine for underground coal mines, its transmission chain, and transmission device, relating to the field of chain technology. It includes: multiple chain link structures, and a pin assembly for sequentially hinged to the multiple chain link structures. Each chain link structure includes a chain plate and a guide sleeve, with guide holes in the guide sleeve and chain plate coaxially arranged. The pin assembly passes through the inner wall of the guide sleeve to sequentially hinge the chain plates of each chain link structure. The working surface of each chain link structure is provided with a reinforcing structure; the working surface includes the working cut surface of the chain plate and / or the working wall of the guide sleeve. This utility model strengthens the strength and wear resistance of the transmission chain by providing a reinforcing structure to the working surface of the chain link structure, solving the problems of wear, breakage, and short lifespan of the transmission chain.

This invention discloses a long-distance pipeline coal slurry preparation system and method for gasifying coal slurry, comprising a slurry storage tank connected to the inlet of a first centrifugal pump, the outlet of the first centrifugal pump connected to the inlet of a raw coal slurry buffer tank, the raw coal slurry buffer tank connected to the inlet of a second centrifugal pump, the outlet of the second centrifugal pump connected to the inlet of a feed filter buffer tank, the feed filter buffer tank connected to a screen settling centrifuge, the centrifuged coal generated by the screen settling centrifuge falling onto a centrifugal coal scraper conveyor, the centrifugal coal scraper conveyor connected to a centrifugal coal storage yard and a centrifugal coal belt scale, the centrifugal coal belt scale connected to the inlet of a dewatered coarse coal kneader, and the dewatered coarse coal kneader connected to a low-pressure coal slurry tank. The system of this invention can simultaneously achieve efficient recovery of both coarse and fine coal slime, producing dewatered coal with low moisture content, while also concentrating and settling coal slime wastewater, reducing the load on subsequent coal slime wastewater treatment plants.

This invention discloses a device for changing the particle size distribution of a mill, relating to the field of mill equipment technology. By employing a segmented wet mill, the raw material input from the first raw coal bunker is first ground and slurried sequentially through the rod mill section and the ball mill section to generate an ultrafine coal slurry, which is then output to a fine slurry tank. Then, the raw material input from the second raw coal bunker, the ultrafine coal slurry from the fine slurry tank, and the raw material are mixed and ground together in a second mill. The resulting coal slurry with a predetermined particle size is output to the discharge trough. This method can obtain a high-concentration, fine-particle coal slurry, while also adjusting the particle size distribution. It features high grinding efficiency, high grinding quality, optimized particle size distribution, improved product quality, and a simple structure.

The application provides a piston structure for a coal slurry conveying diaphragm pump, which comprises a piston cylinder, a piston rod, a piston disc, and a clamping nut; a threaded mounting section and a piston disc mounting section are sequentially arranged in the middle of the piston rod from left to right; the piston disc is sleeved on the piston disc mounting section of the piston rod and is used for dividing the piston cylinder into two mutually isolated working cavities; the left end of the piston rod penetrates through the piston cylinder; the piston structure further comprises a positioning table; the positioning table is located on the right side of the piston disc mounting section and is integrally arranged with the piston rod, the perpendicularity between the left end surface of the positioning table and the piston rod is not greater than 0.01 mm; the clamping nut is threadedly connected with the threaded mounting section of the piston rod and is used for pressing the piston disc on the left end surface of the positioning table. The piston structure for the coal slurry conveying diaphragm pump, the piston disc is fixed on the piston rod through the positioning table and the clamping nut, the positioning table is integrally arranged with the piston rod, the perpendicularity of the positioning end surface is ensured, and the internal leakage of the piston cylinder is effectively avoided.

This invention discloses a coal slurry water recycling device for coal washing, specifically relating to the field of water-saving technology. It includes a wastewater inlet device comprising a wastewater loading component for introducing the raw coal washing liquid and a clean water loading component for introducing the filtered raw coal washing liquid. Both the wastewater and clean water loading components are semi-circular deep-water tanks, with their side planes tightly fitted together and connected at the contact point. During operation, a filter device is inserted into the inner cavity of the wastewater inlet device to intercept lumps and powders during the coal washing process. The filter device features multi-stage cleaning to enhance the cleaning power of the coal washing wastewater. Furthermore, the filter device includes a multi-layer filter screen for filtering the coal slurry wastewater, which is easily removed from the inner cavity of the wastewater inlet device for cleaning, improving the filtration efficiency of the coal washing wastewater and eliminating hand contamination.

The application discloses a kind of water coal slurry component precision online metering and collaborative control system and method, belong to water coal slurry preparation technical field.System includes: multiple raw materials high-precision metering and feeding unit, online quality monitoring unit, multistage particle size optimization grinding unit and central intelligent control unit, by central control unit respectively with other each unit connection, for receiving the quality data of online quality monitoring unit, and with preset target value comparison, real-time adjustment feed quantity and multistage particle size optimization grinding unit each level discharge regulating valve opening degree.Method includes initialization feed, online monitoring and primary adjustment, collaborative grinding and particle size optimization, finished product optimization and closed-loop control four major steps.The application realizes the precision regulation and control of water coal slurry concentration and particle size distribution by multistage closed-loop control, solves the problems of insufficient dynamic metering accuracy of multiple raw materials, slurry preparation and slurry preparation process disconnection, etc., significantly improves product stability and complex raw material resource utilization efficiency.

The application discloses an inlet structure of a vertical coal slurry pump and relates to the technical field of coal slurry pumps. The inlet structure comprises a pump body, an inlet elbow, an inlet short pipe, an inlet pipe and a pump base. The pump body is installed on the pump base. A vertical passage is arranged in the pump body. One end of the inlet elbow is fixed to the pump body and is communicated with the passage. The other end of the inlet elbow is communicated with the inlet short pipe. The inlet short pipe is located between the inlet elbow and the inlet pipe and connects the inlet elbow and the inlet pipe. The inlet short pipe is detachably connected with the inlet pipe and the inlet elbow. The inlet elbow, the inlet short pipe and the inlet pipe are detachably arranged and assembled into an inlet pipeline. When the inlet pipeline needs to be disassembled, the inlet pipe is only needed to be dismounted, so that the disassembly requirement is met, and the disassembly is simple and efficient.

The utility model discloses a device of amide waste liquid comprehensive utilization preparation synthesis gas, including waste water source, pulping device, tail gas recovery unit, gasification reaction device etc, wherein, waste water source is linked with coal mill device entrance intercommunication, and waste water source and coal mill export are linked with tail gas recovery unit entrance, and the coal slurry of preparation is linked with gasification reaction device entrance, and synthesis gas purification recovery system is linked with the outlet intercommunication of gasification device, and waste water coal slurry and oxygen burn reaction in gasification device, and generate synthesis gas, and synthesis gas is recovered after purification. Gasification furnace and high concentration amide waste water coal slurry are combined into one, and synthesis gas is produced while effectively treating high concentration amide waste water, and the influence of waste water on surrounding environment is reduced. Organic matter in waste water is gasified and reacts to generate synthesis gas in high temperature and high pressure environment, and energy consumption is saved.

This invention relates to the field of coal slurry water treatment technology, particularly to coal slurry water treatment agents and their applications. The agent comprises 0.1-0.2% polyacrylamide (PAM), 15-20% powdered activated carbon, 12-15% polyepoxysuccinic acid (PESA), 18-22% calcium humate, 4-6% biosurfactant, 18-22% diatomaceous earth-supported manganese oxide, and 6-8% microbial agents (compound microbial community), with the balance being deionized water. Through the configuration of this device, the formula achieves a suspended solids removal rate ≥95% and a heavy metal removal rate ≥90% during the treatment process, thus improving treatment efficiency. Furthermore, the biodegradability rate is ≥85%, and the activated carbon is recyclable, enhancing environmental friendliness. The liquid and solid formulations meet the needs of different working conditions, making it highly practical and applicable to various situations.

This invention discloses an extreme environment mining method and system using in-situ jet crushing and negative pressure coal slurry back suction, relating to the field of intelligent coal mining and resource recovery technology. The method includes precise exploration modeling; system deployment and lowering, lowering an integrated drilling jet device to form jet pipelines and slurry suction pipelines; isolation and stabilization; in-situ jet crushing and slurry preparation; negative pressure coal slurry back suction and lifting; solid-liquid separation and closed-loop circulation. The system includes an integrated drilling jet device, a mobile positioning system, a negative pressure back suction system, a PLC intelligent control system, a jet circulation system, a grouting system, and a solid-liquid separation system. The extreme environment mining method and system using in-situ jet crushing and negative pressure coal slurry back suction provided by this invention can achieve in-situ crushing and slurry preparation underground, continuous negative pressure back suction and lifting, and can achieve collaborative operation with closed-loop circulation of water media.

The utility model discloses a kind of grinding mechanism of coal water slurry, it includes casing, driving motor, transmission shaft, transmission sleeve and grinding disc;Discharge pipe is communicated with on the side of casing upper side;Feed pipe is communicated with on the other side of casing lower side;Driving motor is fixed on the top of casing, the output end of driving motor is connected with transmission shaft transmission, transmission sleeve is rotatably sleeved on transmission shaft, transmission shaft and transmission sleeve are connected by transmission structure transmission, the rotating direction of transmission shaft and transmission sleeve is opposite;Grinding disc is fixedly sleeved on the lower end outside of transmission sleeve and transmission shaft respectively;Several grinding strips are fixed on the inner wall of casing around two grinding discs.There is beneficial effect: the utility model discloses a kind of grinding mechanism of coal water slurry, coal slurry is ground very finely, and the grinding effect of coal slurry is improved.The cleaning structure of filter screen is simple, realizes the cleaning of filter screen, cleaning cost is low, and the normal operation of equipment is guaranteed.

This invention provides a separator liquid level measuring device and a separator liquid level measuring method. The separator liquid level measuring device includes a pressurization component, a pipeline component, a differential pressure measuring device, and a thermal high-efficiency separator. The pipeline component includes a first pipeline and a second pipeline. The first pipeline is connected to the pressurization component, the positive pressure end of the differential pressure measuring device, and the interior of the thermal high-efficiency separator, respectively. The first pipeline is used to transport light materials. The second pipeline is connected to the negative pressure end of the differential pressure measuring device and the interior of the thermal high-efficiency separator, respectively, and is used to transport purge gas to the top cavity of the thermal high-efficiency separator. The differential pressure measuring device detects the liquid level height in the thermal high-efficiency separator by the pressure difference between the positive and negative pressure ends. The technical solution provided by this invention can solve the problems of bottom sedimentation caused by purge gas and poor liquid level measurement accuracy in the existing methods for measuring the liquid level of coal slurry inside the thermal high-efficiency separator.

This invention discloses a vibrating screening device for adjustable coal slurry particle size distribution, relating to the field of coal slurry screening technology. It includes: a segmented screen box, the interior of which is divided into at least two vibration zones along the coal slurry flow direction; a screening component disposed within each vibration zone, the screening component being adjustable in terms of particle size; an excitation system disposed on the segmented screen box, the excitation system being used to apply independently adjustable harmonic excitation to each vibration zone; a feed hopper disposed above the feed end of the segmented screen box; and a microbubble generating component disposed inside the feed hopper, injecting microbubbles into the coal slurry. This invention possesses significant advantages such as multi-zone heterogeneous vibration, stepless orifice adjustment for coal slurry particle size, and microbubble anti-clogging and screen cleaning, significantly improving the separation efficiency of coarse and fine particles and meeting the need for refined adjustment of coal slurry particle size distribution under different working conditions.