381 results about "Coal slurry" patented technology

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 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 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 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 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 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 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.

The invention discloses a self-distribution type long-life burner, and aims to prepare synthesis gas by partial oxidation of hydrocarbon fuel in the field of coal chemical industry. According to the combustor, the gasification efficiency and the combustion uniformity are improved by optimizing material distribution and the spraying angle. The burner is provided with more than three raw material outlets used for oxygen, nitrogen, water vapor (a first medium), coal water slurry, fluidized coal powder, natural gas, fuel oil, steam (a second medium), waste fuel gas, purge gas, fuel oil, sludge and waste water (a third medium). The outermost channel is specially designed for the second medium or the third medium so as to optimize the spraying angle and material distribution. A shunting and distribution control mechanism is arranged in the necking device, and the necking device comprises a necking original piece made of high-temperature-resistant and corrosion-resistant materials. In addition, the combustor is further provided with a cooling channel used for reducing the working temperature, and the service life of the combustor is prolonged. The combustor can adapt to various working conditions, the gasification efficiency and the stability of product quality are improved, and the requirements of a reaction device for the combustor with high performance, flexible feeding and long service life are met.

The invention discloses a nozzle structure capable of generating a rotational flow field and a coal water slurry process burner adopting the nozzle structure, the nozzle structure comprises a central oxygen nozzle, a coal water slurry nozzle and an epoxy nozzle, the outer side of the central oxygen nozzle is nested with the coal water slurry nozzle, the outer side of the coal water slurry nozzle is nested with the epoxy nozzle, and the epoxy nozzle is nested with the central oxygen nozzle. At least three spiral flow guide structures which are uniformly distributed along the circumference are arranged in a conical annular gap formed between the coal water slurry nozzle and the epoxy nozzle, and the nozzle structure is suitable for any one of a three-channel coal water slurry process burner, a four-channel coal water slurry process burner and a multifunctional combined coal water slurry process burner. According to the overhead single-nozzle gasification furnace, reactants in the overhead single-nozzle gasification furnace can form a spiral descending flight path, and the retention time of the reactants is prolonged, so that effective gas lifting and carbon conversion rate improvement are realized.

The invention discloses carboxyalkylated lignin as well as a preparation method and application thereof in coal gasification wastewater coal slurry, and belongs to the technical field of coal water slurry. The carboxyalkylated lignin with a three-dimensional structure is obtained by introducing a carboxyalkyl branched chain into a lignin structure through a graft copolymerization method. The preparation method comprises the following steps: dissolving lignin in deionized water or isopropanol, adjusting the pH value to 11-12, adding a reaction reagent with a carboxyl functional group and an alkyl chain, and reacting in a water bath at 60-80 DEG C for 2-4 hours; then adjusting the pH value to 6-7; and washing, centrifuging and purifying to obtain the carboxyalkylated lignin. Carboxyalkylated lignin is used as a dispersing agent to be applied to a system for preparing coal water slurry from coal gasification wastewater, coal particles can be fully dispersed and stabilized in a complex coal gasification wastewater system by using fewer adsorption sites, and the carboxyalkylated lignin can be used as the dispersing agent to remarkably improve the slurrying performance and long-term stability of coal gasification wastewater coal slurry.

A coal weighing system (10) comprising: a sludge bucket (15) with a plurality of permanently connected load cells, wherein the load cells (20) are configured to measure the precise amount of coal being transported for loading or unloading from the sludge bucket onto the railcar, wherein the sludge bucket has an RFID reader (35) on its front; wherein an RFID tag (40) is attached to each wagon / compartment to accurately extract the required amount of coal from the sludge bucket, wherein the RFID reader of the sludge bucket checks the RFID tag before dispensing the coal into the wagons during each loading / unloading cycle, wherein the coal load of each compartment / wagon is measured using the load cell values ​​of the sludge bucket in relation to the RFID tag; a microcontroller (25) which coordinates and executes the measured loading / unloading of the coal by means of an RFID tag / reader and load cells, wherein the microcontroller enables the sludge bucket to load / unload the coal in precisely dosed amounts from the storage area into the wagon compartment, wherein the connection between the RFID reader and the tag measures the amount of coal loaded in a wagon / compartment; a user interface module (30) used to check / display the amount of coal loaded / unloaded in each compartment / wagon based on predefined instructions, whereby authenticated users can check the coal inflow and outflow in terms of time and quantity; There is a buzzer (45) in the operating area of ​​the sludge bucket which alerts the operators if the coal load in a particular compartment / wagon is too high.

1. Name of the product in this design: Dual-drive vibrating spiral coal-water separation equipment. 2. Application of this design: It is used in scenarios such as coal mine drilling and underground coal mining operations. Its core function is to efficiently separate and filter the coal slurry-water mixture generated during the drilling process to ensure that the water quality meets the standards for discharge or recycling. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The utility model relates to a raw coal conveying and dewatering device which comprises a linear vibrating screen arranged at the tail of a raw coal main conveying belt and used for conducting primary screening on conveyed raw coal and throwing screened large-particle raw coal into the main conveying belt to be conveyed out. The small-particle-containing raw coal slurry falls into a sedimentation tank; the slurry pump is placed in the sedimentation tank and used for stirring and sucking raw coal slurry in the sedimentation tank and conveying the raw coal slurry to the solid-liquid separator, and a discharging port of the slurry pump is connected with a feeding port of the solid-liquid separator through a pipeline; the solid-liquid separator is erected above the main conveying belt and used for conducting secondary screening and dewatering on the raw coal slurry conveyed by the slurry pump and throwing screened solid raw coal particles into the main conveying belt to be conveyed out, and remaining slurry water is conveyed to a designated place. The dehydration problem of raw coal in the transportation process can be solved, the applicability is high, the conveying capacity is large, the dehydration effect is good, and the problem of on-site production halt caused by large water content of the raw coal is solved.

The present invention discloses a rubber powder blended water coal slurry additive, which comprises 15-25% of polynaphthalene formaldehyde sulfonate sodium salt, 10-20% of egg white, and 0-5% of antioxidant by mass percentage, wherein the content of the antioxidant is not zero, and the rest is water. The present invention also discloses a preparation method and an application of the rubber powder blended water coal slurry additive. The rubber powder blended water coal slurry additive of the present invention can effectively improve the fluidity and reduce the viscosity of the water coal slurry blended with rubber powder mainly by adding egg white powder, and can increase the concentration of the water coal slurry blended with rubber powder under the condition of meeting the production viscosity requirement. Moreover, by using the rubber powder blended water coal slurry additive of the present invention, rubber powder can be added to the water coal slurry, and the rubber powder is the powder of waste tires, so the utilization of solid waste is realized, and a positive contribution can be made to carbon reduction. More than 50% of the rubber powder for co-firing is natural rubber, and compared with fossil fuels, the carbon emission of natural rubber is zero. After blending rubber powder, the emission of carbon dioxide can be effectively reduced.

The present invention relates to a drying apparatus for evaporating volatile constituents from a starting material to be dried, to a process for producing an isocyanate using this drying apparatus and to the use of the drying apparatus for drying distillation bottoms streams, oil-containing waste, waste paint or coating materials, sewage sludges, mineral substances and coal slurries contaminated with organic compounds. In the drying apparatus the evaporated constituents (vapours) are passed into a condenser via a vapor dome and a vapor conduit. The drying apparatus has the feature that partial condensation of the vapours in the vapor dome and / or in the vapor conduit is intentionally allowed or induced during operation, and condensed constituents of the vapours are discharged from the drying apparatus via means installed for this purpose in the vapor dome and / or the vapour conduit.

The invention discloses a ball guide for a one-way valve and the one-way valve, belongs to the technical field of displacement pumps of fluid machinery, solves the technical problems that the ball guide is complex in structure and difficult to manufacture, and comprises a guide end, a guide cavity and a mounting end which are integrally formed. The guide end is used for guiding the valve ball to return, and the installation end is matched with the one-way valve seat and used for ball guide installation. The inner diameter of the guide cavity is in radial clearance fit with the diameter of the valve ball, flow guide window holes are formed in the cylinder wall of the guide cavity, and the total overflowing area of the flow guide window holes is larger than the sectional area of an inlet of the one-way valve. The one-way valve comprises a ball guide which is used for guiding the valve ball. The diaphragm pump is used for conveying coal water slurry or ore pulp.

The invention provides a coal water slag metering device based on a crushing mechanism. The coal water slag metering device comprises a metering device body, and a motor is mounted on the metering device body; the metering device body is further provided with a flow adjusting hand wheel. A detection pipe is fixedly connected to an opening in one side of an output pipe of the metering device body, a particle sensor is fixedly connected to the top end of the detection pipe, and a smashing mechanism is fixedly connected to an input pipe of the metering device body. Through the arrangement of the protective cover, the cooling fins, the inlet and outlet pipe, the rotating machine core, the crushing motor, the roller ball sleeve and the grinding roller ball, large-particle coal slag in coal slurry can be prevented from entering the metering device, and normal work of the metering device is guaranteed.

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.