586 results about "Coal slurry" patented technology

The invention discloses a raw coal flotation-electrolysis combined quality-based resource utilization method, which relates to the technical field of coal separation, and comprises the following steps: crushing and grinding raw coal, and carrying out flotation separation to obtain clean coal and tailing slurry; mixing the tailing slurry and a sodium hydroxide solution as an anolyte, carrying out electrolysis by taking the sodium hydroxide solution as a catholyte, and carrying out cathode reduction to obtain hydrogen; filtering, separating, washing and drying the anolyte to obtain an inorganic salt product; mixing the filtrate and the washed solution, concentrating, acidifying until the pH is equal to 3, filtering, washing and drying in vacuum to obtain water-insoluble acid; and acidifying the filtrate until the pH value is 1.5, and carrying out extraction, concentration and vacuum drying to obtain the solid water-soluble acid. According to the method, flotation and electrolysis are combined, the utilization efficiency of coal resources is improved, the technological process is simplified, the cost is reduced, the overall economic benefit is improved through a byproduct high-value product, and a more environment-friendly coal separation and utilization mode is achieved.

The invention relates to the technical field of coal water slurry additive processing, and particularly discloses a heat exchange device for coal water slurry additive processing, which comprises a reaction kettle, an overhaul bin gate, a rotary sealing mechanism, a first stirring mechanism, a second stirring mechanism, a feeding pipe and a discharging pipe, and the overhaul bin gate is hinged to the front side of the reaction kettle to realize sealed opening and closing. According to the invention, integration of stirring and heat exchange functions and efficient removal of a source of reaction heat are realized; meanwhile, the second stirring mechanism realizes stepless regulation and control of the angles of stirring blades through a built-in electric driving assembly, so that the core technical problems of flowing dead zones, scaling and incapability of adapting to process changes caused by low heat exchange efficiency and function splitting of a traditional device are solved, and the device has the effects of high heat exchange efficiency, deposition prevention, self-cleaning and dynamic and adjustable stirring force.

The present invention discloses a water-coal slurry fluidity detector, which specifically relates to the field of water-coal slurry detection technology, including a base, a diversion detection component is arranged on the base, the diversion detection component includes a support arranged on the base, a cover plate is arranged on the top of the support, and a first delivery pipe is arranged on one side of the cover plate. The present invention realizes the function of gathering the fluid water-coal slurry by delivering the water-coal slurry to the top of the sealing disk and the diversion cavity through the second impeller. As the fluid water-coal slurry in the diversion cavity gradually increases, the fluid water-coal slurry can be diverted and transported through each diversion detection tube. The flow meter in the diversion detection tube first detects the flow of the water-coal slurry transported by the diversion detection tube, and the speed of the second impeller during rotation is fixed, and then the pressure during the extraction and transportation of the water-coal slurry is also fixed, so as to avoid the pressure difference and cause inaccurate detection.

The invention discloses a coal water slurry dividing wall type heat compensation type gas comprehensive utilization system and method. The system comprises a mixer, a Roots blower, a material returning device, a dust remover, a heat storage oxidation device, a secondary air exhaust gas preheater, a primary air exhaust gas preheater and an induced draft fan which are connected in sequence. The secondary air exhaust gas preheater is connected with a secondary fan; the primary air exhaust gas preheater is connected with a primary fan; the heat storage oxidation device is connected with the waste heat boiler; the secondary air exhaust gas preheater is connected with the coal water slurry combustion device; by means of the coal mine gas extraction system, the situation that the working condition temperature of all points in the system is lost until the system is shut down due to unstable flow and concentration of coal mine gas extraction can be avoided, the coal mine gas extraction efficiency is improved, and the coal mine gas extraction efficiency is improved. Therefore, heat supply interruption to heat consumers is avoided, the heat interruption risk is reduced, and the operation cost and the safety risk of the device are reduced.

The invention discloses a coal chemical industry drum screen cleaning structure and an operation method, and relates to the technical field of drum screens. The coal chemical industry drum screen cleaning structure comprises a mounting base, the upper end of the mounting base is fixedly connected with a lower shell, the lower end of the lower shell extends to the lower end of the mounting base, the upper end of the lower shell is provided with an upper cover, and the right side of the upper end of the mounting base is fixedly connected with a gear motor; the output end of the gear motor penetrates into the lower shell and is fixedly connected with a rotating shaft, and the surface of the rotating shaft is fixedly connected with an annular support. The rotary screen solves the problems that an existing rotary screen is not provided with a cleaning structure, when people use the rotary screen for a long time, solid materials contained in coal slurry materials can be clamped in screen holes in a rotary screen net, screening of the coal slurry materials can be affected if cleaning is not conducted in time, the rotary screen net is manually detached and cleaned in a traditional cleaning mode, and cleaning is not conducted. The technical problems that time and labor are wasted during disassembly and assembly, and production efficiency is affected are solved.

The utility model relates to a device for producing hydrogen by electrolyzing water, in particular to a device for producing hydrogen by electrolyzing water through iron-based circulation assistance. The utility model aims to solve the problems of large electrolytic solution resistance, high equipment complexity and pipeline blockage in the existing water electrolysis technology. The utility model discloses a device for iron-based circulation assisted water electrolysis hydrogen production. The device comprises an electrolyte tank, an ion exchanger, a circulating pump, a transformer, a rectifier, an electrolytic bath, a first compressor, a second compressor, a high-pressure storage tank, a gas storage tank, a plurality of dryers, a cathode, an anode and a proton exchange membrane. According to the utility model, the design of the carbon powder dispensing electrode is adopted to replace the suspension state of coal slurry, and meanwhile, the one-step electrolysis design and the efficient circulation auxiliary module are combined, so that the solution resistance and the equipment complexity are obviously reduced, and the problem of pipeline blockage is solved; the iron-based circulating auxiliary water electrolysis hydrogen production device is efficient, low in power consumption, stable and reliable, and is suitable for large-scale industrial popularization.

The invention discloses a method and system for long-distance conveying and utilization of coal slime, and the method comprises the following steps: S1, adding water and an optional coal slurry additive into the coal slime, and fully stirring to obtain low-concentration coal slurry with the coal slime concentration not higher than 55%; s2, pressurizing the obtained low-concentration coal slurry through a coal slurry pump, and conveying the pressurized low-concentration coal slurry to a destination close to a coal water slurry gasification device through a coal slurry conveying pipeline; and S3, feeding the low-concentration coal slurry reaching the destination and the solid coal powder into a coal mill together to prepare the coal water slurry so as to obtain qualified coal water slurry for gasification, and feeding the coal water slurry into a gasification device for utilization. The coal-water slurry for gasification with proper concentration is prepared in a manner of firstly diluting and then supplementing coal to adjust the coal concentration in the product, so that coal slime can be conveniently transported according to the requirement of actual utilization distance, the coal-water slurry for gasification with relatively high combustion value can be prepared, and the economy of coal slime utilization is improved.

The invention discloses a direct coal liquefaction catalyst suitable for mild coal liquefaction in the Hami region and a preparation method thereof, and relates to the technical field of direct coal liquefaction. The method comprises the following steps: firstly, preparing coal slurry with a certain mass fraction, and grinding and finely crushing the coal slurry; adding a surfactant into the obtained coal slurry to disperse the coal slurry; sequentially adding ferric salt and ammonia water into the dispersed coal slurry to obtain a first mixed solution; blowing oxygen into the first mixed solution, and after a period of time, adding a non-ferrous metal salt solution to obtain a second mixed solution; and filtering the second mixed solution, collecting solids, and drying the solids to obtain the product. According to the method, the dispersity and the catalytic effect of the iron-based catalyst can be effectively improved, and the coal liquefaction performance of coal with the inert component proportion being smaller than 2% under the mild liquefaction condition can be improved on the premise that a small amount of non-ferrous metal is used.

The invention provides a method for preparing a composite carbon-based slow-release fertilizer by synergistic modification of coal water slurry gasification slag and biomass, which comprises the following steps: step S1, crushing coal water slurry gasification slag, mixing with a chlorinating agent according to a certain mass ratio, reacting for a period of time at a certain temperature in a chlorine-containing gas atmosphere, filtering, and drying to obtain the composite carbon-based slow-release fertilizer. Removing heavy metals, washing with water, and drying to obtain detoxified gasified slag; s2, mixing the detoxified gasification slag with biomass powder, and roasting; s3, the roasted product is crushed after being subjected to acid pickling and functional additive strengthening, and the composite carbon-based fertilizer is obtained; the Pb / Cd / As residue of the fertilizer is less than or equal to 5ppm, namely the removal rate is greater than or equal to 96%, the specific surface area is 280-350m < 2 > / g, the hierarchical pore size distribution is realized,-OH is greater than or equal to 1.2 mmol / g, and-COOH is greater than or equal to 1.8 mmol / g; the 28d nitrogen and phosphorus accumulative release rate is less than or equal to 25%, the soil water retention rate is increased by more than or equal to 25%, the heavy metal exchange state is reduced by more than or equal to 60%, the preparation cost is about 780-820 yuan / t, the process is simple and controllable, and remarkable environmental protection and economic benefits are achieved.

A coal slime water separating and conveying device for an underground coal mine effectively solves the problems that coal slime water and gas generated during working of an underground coal mine drilling machine cannot be effectively collected, and coal slime in coal slime water cannot be effectively separated. A spiral conveyor, a vibrating screen, a slime water buffer chamber, a hydraulic pump station and a gas-water separation box are sequentially installed on the vehicle body from left to right, a discharging door located above the vibrating screen is arranged on the slime water buffer chamber, a plunger pump is installed in the vehicle body and communicated with the bottom of the vibrating screen, and a negative pressure fan is installed above the slime water buffer chamber. The negative pressure fan is communicated with the slime water buffer chamber, the upper portion of the slime water buffer chamber is communicated with the bottom of the gas-water separation box through a pipeline, and a belt conveyor corresponding to the spiral conveyor is arranged behind the vehicle body.

The invention discloses a method for improving slime water treatment efficiency, and relates to the technical field of slime water treatment.Densitometers for measuring the density of slime water are installed at different positions in a slime water treatment pond, and flow meters and electric ball valves are installed on a slime water input pipeline, a slime water output pipeline and a dosing pipeline; the densimeter and the flow meter send related measured values to the intelligent dosing control terminal, the intelligent dosing control terminal analyzes and judges the measured values and then controls opening and closing of the electric ball valves, the dosage of chemicals matched with the density and the volume of the coal slime water is added, the chemicals and the coal slime water are fully mixed through the coal slime water stirrer, finally the treated coal slime water is discharged, and solid-liquid separation is achieved. By collecting the density and the volume of the coal slime water needing to be treated in real time and intelligently adding the matched dosage of the coal slime water, the use amount of the agent can be accurately controlled, the intelligent technical level and the treatment efficiency of coal slime water treatment are improved, human subjective factor intervention is reduced, and the labor intensity of workers is reduced.

The utility model discloses a novel coal water slurry fine grinding machine, which belongs to the technical field of coal water slurry fine grinding machines, and comprises a fine grinding tower, one side of the fine grinding tower is communicated with a discharge pipe, one side of the discharge pipe is fixedly provided with a filter plate, and the inside of the discharge pipe is fixedly connected with a first fixing block. A hydrodynamic turbine is rotationally connected to one side of the first fixing block, a second fixing block is fixedly connected to the interior of the discharging pipe, and a reduction gearbox is fixedly connected to the second fixing block. According to the material scraping device, the hydrodynamic turbine drives the material scraping blades through speed reduction of the reduction gearbox, so that the hydrodynamic turbine can drive the material scraping blades to rotate and scrape in a more labor-saving mode, when the hydrodynamic turbine rotates, the rotation detector can detect the rotation state of the hydrodynamic turbine in real time, and when the hydrodynamic turbine stops rotating, the state alarm lamp can give an alarm. Therefore, workers can be notified in time, the filter plate is prevented from being blocked easily, the machine body is prevented from being locked, and the operation stability of the machine body is improved.

The invention discloses a flotation flow adjusting method and device of flotation equipment, a processor and electronic equipment. The method comprises the steps that an initial feeding flow signal of coal slurry is obtained, and the initial feeding flow signal is used for at least representing the speed of the coal slurry entering flotation equipment; the initial feeding flow signal is subjected to noise reduction, and a target feeding flow signal is obtained; based on the target feeding flow signal, the current flotation flow of the flotation equipment is adjusted to the target flotation flow, the current flotation flow is used for representing the current speed of a flotation reagent entering the flotation equipment, the flotation reagent is used for separating coal from the coal slurry, and the target flotation flow corresponds to the target feeding flow signal. The technical problem of low efficiency of floating carbon selection is solved.

The utility model relates to the technical field of coal chemical industry, in particular to a device for simulating scaling stability in a coal-oil slurry transportation process. Comprising a coal-oil slurry stirring tank connected with a high-pressure hydrogen pipe, the coal-oil slurry stirring tank is connected with one end of a simulation conveying pipe through a feeding pipe, the other end of the simulation conveying pipe is connected with a coal-oil slurry buffer tank through a discharging pipe, the coal-oil slurry buffer tank is connected with the coal-oil slurry stirring tank through a circulating pipe, and a coal-oil slurry circulating pump is arranged on the circulating pipe; an oil-coal-slurry conveying pump is arranged on the feeding pipe, the feeding pipe is connected with a plurality of feeding branch pipes, each feeding branch pipe is provided with a branch pipe valve and a branch pipe flowmeter, the discharging pipe is connected with a plurality of discharging branch pipes, and the two ends of a plurality of simulation conveying pipes with different inner diameters are connected with the feeding pipe and the discharging pipe through the feeding branch pipes and the discharging branch pipes respectively. A plurality of pressure gauges are arranged on the simulation conveying pipe at intervals, and a heat tracing sleeve is arranged outside the simulation conveying pipe. The device is reasonable in structural arrangement, and is favorable for mastering the scaling risk of the coal-oil slurry in advance in the production process so as to carry out response treatment in time.

The invention discloses high-purity submicron or nano lignin and a preparation method thereof, and belongs to the technical field of agricultural and forestry biomass resource utilization and energy conservation and environmental protection. According to the method disclosed by the invention, the biomass raw material is subjected to the processes of pickling and deliming, microwave drying, microwave extraction by ethylene glycol, water, sulfuric acid and formic acid, and lignin separation by water and acetic acid, so that the high-purity submicron or nano lignin with the average particle size of 90-400nm, the ash content of less than 50mg / kg and the alkali metal impurity content of less than 5mg / kg can be obtained; and the used ethylene glycol solvent is subjected to distillation concentration, performance regeneration and cyclic utilization. The lignin has good dispersing performance and adsorption performance, can be applied to wastewater treatment and dispersants of dye, pesticide, coal water slurry and other systems, can also be carbonized to prepare submicron / nanoscale porous carbon materials, and is applied to the fields of biological medicine, micro-nano devices and the like.

The invention provides fuel coal water slurry and a preparation method thereof. The fuel coal water slurry comprises pulverized coal, water, an additive and a carbon-based nano material modifier, the additive comprises a dispersant and a stabilizer, the carbon-based nano material modifier has a tubular structure or a layered structure, and the average pipe diameter or interlayer spacing of the carbon-based nano material modifier is smaller than the average pore diameter of the pulverized coal. Compared with fuel coal water slurry not containing the carbon-based nano material modifier, the coal water slurry can reduce the combustion temperature, inhibit mineral substance pyrolysis and generation of nitrogen oxides and carbon monoxide, thereby reducing the heat loss of coal combustion. The carbon-based nano-material modifier has a tubular structure or a layered structure, and compared with other ranges, the average pipe diameter or interlayer spacing of the carbon-based nano-material modifier is limited to be smaller than the average pore diameter of the pulverized coal, so that water can leave a coal particle pore structure and enter the carbon-based nano-material modifier, the volatilization temperature of the water in the combustion process is reduced, and the combustion efficiency is improved. Therefore, the calorific value of the fuel coal water slurry is improved.

The utility model discloses a spiral-flow type coal water slurry process burner. The spiral-flow type coal water slurry process burner comprises a three-channel structure, the three-channel structure sequentially comprises a central oxygen channel, a coal water slurry channel and an outer epoxy channel from inside to outside; the central oxygen channel, the coal water slurry channel and the outer epoxy channel are connected through flanges; a cooling water assembly is arranged on the outer side of the outer epoxy channel; a central oxygen cyclone is fixed on the inner wall of the central oxygen channel and comprises a cyclone bracket and a first cyclone sheet; one end, far away from the burner head, of the rotational flow bracket is in a pointed cone shape; the first swirl piece is formed by stretching a first end face along a curve, and a first adjacent side face of the first swirl piece is fixedly connected with the swirl support. Through a rotational flow form, the mixing effect of oxygen and coal water slurry is enhanced, and the purpose of sufficient mixed combustion is achieved, so that the carbon conversion rate is improved, the yield of carbon monoxide and hydrogen serving as main components in the period of validity is improved, efficient and clean utilization of coal resources is realized, and the production cost is reduced.

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 utility model discloses an abrasion -resistant coal water slurry feed diaphragm pump relates to coal water slurry conveying technical field, including fixed base, four pump body housings are fixedly connected through the fixed stand on the fixed base, both ends of each pump body housing are fixedly connected with fixed end cover in thread, and both sides fixed end cover correspond fixedly connected with inner hose diaphragm and outer hose diaphragm between pump body housing inner chamber, the inner hose diaphragm is inserted to the center of outer hose diaphragm, and one side fixed end cover is buried with pressure sensor between annular gap end position between inner hose diaphragm and outer hose diaphragm, and the structure of double hose diaphragm makes the coal water slurry that is transported only with inner hose diaphragm inside and modular one -way valve contact, and is completely isolated with the pump cavity of pump body housing. Effectively avoid the corrosion and abrasion of the pump cavity of pump body housing to coal water slurry. The deformation of inner hose diaphragm and outer hose diaphragm is closer to the expansion and shrinkage of radial, avoids stress concentration, and makes fatigue life greatly improve.

The present invention discloses an exhaust gas treatment device and method for a water-coal slurry additive production workshop, which relates to the field of waste gas treatment technology. The device comprises an exhaust pipe and two adsorption cabins connected in series through the exhaust pipe. The bottoms of the two adsorption cabins are each provided with an adsorption mechanism for adsorbing particulate matter in the additive exhaust gas. The upper parts of the two adsorption mechanisms are commonly connected to an air inlet pipe, and one end of the air inlet pipe is connected to a heating mechanism for heating the exhaust gas. In the present invention, the exhaust gas inside the connecting hood is directly burned and heated by a burner, which can quickly heat the exhaust gas to a temperature range suitable for the decomposition or conversion of VOCs. The high temperature makes the VOCs in the exhaust gas more active, and some low-boiling-point VOCs can even be directly converted from a gaseous state to a form that is more easily captured, such as liquid or solid particles, so that they are more easily captured by subsequent adsorption or filtering devices. After the combustion and heating treatment, more VOCs can be separated from the exhaust gas.

The invention provides an ultrasonic particle size detection system for coal slurry. The ultrasonic particle size detection system comprises a fixed frame; a coal slurry container; a stirring device; a degassing device; a particle size detection device; a signal generator and an oscilloscope. The invention provides a coal slurry ultrasonic particle size detection method. The coal slurry ultrasonic particle size detection method comprises the following steps: carrying out ultrasonic particle size detection on clear water to obtain a clear water attenuation amplitude; performing ultrasonic particle size detection on the coal slurry subjected to degassing treatment to obtain a coal slurry attenuation amplitude; calculating a coal slurry ultrasonic attenuation coefficient according to the clear water attenuation amplitude and the coal slurry attenuation amplitude; and performing inversion on the coal slurry ultrasonic attenuation coefficient by utilizing Monte Carlo simulation prediction and a particle swarm optimization method to obtain the coal slurry ultrasonic particle size distribution. According to the invention, coal slurry degassing and granularity detection are systematically realized, and the problems of difficulty in online detection of coal slurry granularity and bubble interference are fundamentally solved.

The utility model relates to the technical field of coal slurry pipeline sampling, in particular to a coal slurry sampling device which comprises a sampling valve, the sampling valve is installed on a pipe body of a coal slurry pipeline, the two ends of the coal slurry pipeline are fixed to corresponding pipe openings of a coal slurry pump and a coal slurry groove respectively, and the connecting position of the sampling valve and the coal slurry pipeline is a V-shaped connector. The joint is blocked by the V-shaped valve clack; the coal slurry sampling device has the beneficial effects that the distance between the valve clack and the coal slurry pipeline and the distance between the valve seat and the coal slurry pipeline are moderate, on one hand, coal slurry is not easy to deposit in a space above the valve clack, and on the other hand, the valve clack does not extend into the coal slurry pipeline, so that the coal slurry in the coal slurry pipeline does not scour the valve clack; the V-shaped valve body can be provided with an optimal angle according to the mounting position of the sampling device, the whole valve body is in a streamline design, an inner cavity of the valve body has no dead angle, the flow channel surface is smooth, and coal slurry is not easy to hang on the inner wall.

The utility model provides an underground coal mine slime water comprehensive treatment system and a water sump, and relates to the technical field of water treatment.The underground coal mine slime water comprehensive treatment system comprises a plurality of water treatment branches which are arranged side by side in the water flow direction, and each water treatment branch achieves staged treatment on materials with different particle sizes through combination of a first material treatment system and a second material treatment system; and the processing efficiency is improved. The cleaning and digging equipment and the filter press have high automation level, manual intervention is reduced, and safety is improved. By means of the mode, particles in gushing water can be effectively treated, clean water can enter a bin, the water bin silting frequency can be reduced, and therefore the cleaning and digging frequency is reduced. And moreover, the one-time digging time is shortened, and the influence on production is reduced. The effects of automatic cleaning and real-time cleaning can be achieved, and the technical problem of a coal mine scene is solved.

This invention discloses a wastewater treatment control device, belonging to the field of underground coal mine wastewater treatment technology. It includes a vibrating screen mechanism and a water tank. The vibrating screen mechanism is used for primary solid-liquid separation of coal slurry water. A rotating mechanism driven by a linear drive mechanism is provided between the vibrating screen mechanism and the water tank. This rotating mechanism includes a partition section for dividing the water tank into a turbid water zone and a clear water zone, and for secondary separation of fine coal slurry particles, enabling the discharge of coal slurry from the turbid water zone and the underground utilization of the water from the clear water zone. This invention utilizes a multi-stage treatment process consisting of vibrating screening and dynamic zoned sedimentation to complete the entire process from coarse particle separation to fine particle settling and clarification underground, achieving on-site reuse of clear water and significantly reducing hoisting costs and surface treatment load. The adjustable partition plate, as a secondary treatment unit, can dynamically adjust the volume of the clear and turbid water zones, ensuring water quality stability and system shock resistance. The stirring and scraping mechanism can automatically clean the water tank and screen, reducing the burden of subsequent manual sludge removal.

The invention relates to the technical field of coal slime treatment, and discloses a desliming grading device for flotation, which comprises a conical hopper main body and a slurry feeding pipe, and further comprises a fine silt floating area, a coarse particle settling area and a buffer shunting mechanism, the buffer shunting mechanism comprises a buffer cone arranged below the slurry feeding pipe, and the outer part of the buffer cone is fixedly connected with a buffer cylinder; slurry feeding openings are formed in the outer portion of the buffering cylinder at equal intervals, a connecting piece is arranged at the top of the buffering cylinder, and the water feeding mechanism is arranged at the junction of the fine silt floating area and the coarse particle settling area. Coal slurry fed through the slurry feeding pipe can fall on the buffer cone and is shunted along the conical surface, one part of the coal slurry shunted along the conical surface enters the buffer cylinder to be retarded, and the other part of the coal slurry is obliquely output into a fine silt floating area through the circumferential slurry feeding port, so that the coal slurry is discharged from the buffer cylinder to the fine silt floating area. The coal slurry entering after being buffered and shunted by the buffer cone and the buffer cylinder can reduce the impact on a coarse particle settling area and the damage to an ascending water flow field, so that the desliming and grading effects are improved.

The utility model relates to the technical field of coal washing and processing, in particular to a slime water treatment device for coal washing and processing, which comprises a base and a treatment barrel arranged at the top of the base, and further comprises a feed port arranged at the top of the treatment barrel, a water outlet is arranged at the bottom of the surface of the treatment barrel, and a stepping motor is bolted at the top of the treatment barrel. A rotating mechanism is arranged on one side of the stepping motor; under the cooperation of the stepping motor and the rotating mechanism, the stirring rods on the surface of the first rotating rod can rotate, and the stirring rods on the surface of the second rotating rod can rotate in the opposite directions at the same time, so that the mixing effect of a flocculating agent and slime water is accelerated, and the working efficiency of the device is improved; and meanwhile, under the cooperation of a rotating shaft, a connecting rod and a vibration mechanism, a filter screen can vibrate in the inner cavity of the treatment barrel, the situation that solid matter is accumulated at the top of the filter screen is effectively prevented, and therefore the water source discharging speed of the device is increased.

The present invention relates to the field of liquid level measurement technology, and specifically discloses a mechanical water-coal slurry storage tank liquid level measuring device, comprising: a tank body, a mounting opening is provided on the top thereof, and a measuring frame is fixedly installed on the inner wall of the mounting opening, the bottom of the measuring frame extends to the inner bottom of the tank body; an instrument barrel, an observation port for fixing the instrument barrel is provided on one side of the measuring frame, and an annular scale line is provided on the inner wall of one side of the measuring frame, and an indicator needle is rotatably connected to the middle of the inner wall of one side of the measuring frame via a pin. The present invention can effectively push away precipitated coal particles to prevent them from getting stuck on an annular floating platform, and can also overcome the high viscosity resistance of the water-coal slurry, allowing the annular floating platform to move quickly and stably with changes in the liquid level, avoiding measurement failure problems caused by stagnation or slow rise, and can also amplify the tiny displacement of the annular floating platform and accurately convert it into a noticeable rotation of the indicator needle, thereby realizing rapid measurement of the liquid level.

The utility model relates to the technical field of drum screen cleaning, in particular to a washing device for a drum screen at an outlet of a coal mill, which comprises a drum screen and a gas-water spraying device, the drum screen comprises a screen drum and a drum shield, the screen drum is arranged on the inner side of the drum shield, and the gas-water spraying device comprises a spraying pipe and a gas-water mixer. A spraying pipe is arranged on the inner side of the upper portion of the roller protective cover, and a gas-water conveying pipeline is fixedly communicated between a right inlet of the spraying pipe and an outlet of the gas-water mixer. The device is reasonable and compact in structure and convenient to use, by additionally arranging the air-water spraying device, instrument air and water are mixed according to a specific proportion, impurities blocking sieve holes in the sieve barrel can be effectively removed, the sieve holes are kept unblocked, the concentration of coal slurry can be controlled and can be improved by 0.5%, the production process is stabilized, economic benefits are increased, and the device is suitable for popularization and application. The fluctuation of the whole process system caused by the quality of the coal slurry and the waste of raw water caused by excessive flushing are avoided.

The invention belongs to the technical field of coal chemical industry and environmental protection, and particularly discloses a system and method for co-processing high-COD wastewater and sludge through coal water slurry gasification. The mixing and conveying unit is used for mixing the mixed liquid of the pretreatment unit with coal slurry to form homogeneous slurry; a combustion control unit; sludge and high-COD wastewater are fully mixed through the pretreatment unit, then pretreated mixed liquid and coal slurry are mixed through the mixing and conveying unit to form homogeneous slurry, finally, the homogeneous slurry is atomized and then enters the gasification furnace, oxygen is introduced into the gasification furnace, the homogeneous slurry is fully combusted, and the high-COD wastewater is obtained. Homogeneous mixing and complete combustion of the high-COD wastewater, the biochemical sludge and the coal slurry are achieved, the treatment cost of the sludge and the high-COD wastewater is reduced, meanwhile, heat values and carbon in the sludge and the high-COD wastewater are recycled, the organic wastewater treatment efficiency is effectively improved, the property of the coal water slurry is not changed, and the yield of wet gas can be guaranteed.

The present invention provides a coal direct liquefaction system and a coal direct liquefaction method. The coal direct liquefaction system includes an oil-coal slurry configuration unit, a preheating mixing unit, a first coal direct liquefaction reactor, a second coal direct liquefaction reactor, a third coal direct liquefaction reactor, a first separation unit, a distillation tower, a hydrogenation unit, a second separation unit and a hydrogen supply unit. The present invention solves the technical difficulties of reactor coal powder deposition, mineral deposition, low utilization rate, poor operating stability and solid particle powder entrainment in the existing coal direct liquefaction technology, as well as the bottleneck problem that restricts the further expansion of the reactor, thereby realizing long-term and efficient operation of the coal direct liquefaction device, improving the utilization rate and single-series scale of the coal direct liquefaction reactor, improving energy utilization efficiency, and contributing to energy conservation and carbon reduction.