735 results about "Slurry flow" patented technology

The invention relates to the technical field of reservoir bedrock anti-seepage grouting, and discloses a reservoir bedrock anti-seepage grouting method which comprises the following steps: acquiring fracture data through geological exploration, and constructing a reservoir bedrock fracture distribution model; simulating a flow path and permeability characteristics of the slurry in the fracture based on the fracture model; the grouting pressure and flow are determined through an optimization algorithm, and a grouting scheme is formulated; screening grouting materials according to fracture characteristics, and analyzing stress-strain and permeability of the grouting materials; a construction process is formulated, the grouting state is monitored in real time, and parameters are dynamically adjusted; and after grouting, carrying out permeation and pressure test to evaluate whether the curing effect reaches the standard or not. Based on the three-dimensional fracture structure modeling and flow field simulation technology, high-precision recognition and dynamic evolution tracking of the fracture permeation path in the complex rock mass of the reservoir bank are achieved, so that grouting hole layout is more accurate, the slurry flow direction is more controllable, and the method is different from a point-selecting grouting mode of a traditional empirical method.

The invention belongs to the technical field of tunnel engineering, and provides a multi-physics field real-time assimilation simulation and regulation method and system in a tunnel grouting process in order to solve the problem that real-time dynamic simulation and automatic regulation are lacked in existing tunnel construction, and the real-time assimilation simulation and regulation method and system in the tunnel grouting process are provided by utilizing ensemble Kalman filtering and combining real-time monitoring data in the tunnel grouting process. Dynamically correcting parameters of the multi-physical model; time correlation in the slurry condensation process is considered, a time-varying condensation model depicting physical property changes of slurry evolving along with time is integrated, the time-varying condensation model serves as an external function in the time step length to be embedded into the multi-physical field model in correction, and the slurry flowing state is adjusted in a self-adaptive mode through numerical simulation; and generating control parameters of tunnel grouting according to a dynamic simulation result, and realizing closed-loop regulation and control of tunnel grouting. Synchronous linkage of numerical simulation and on-site working conditions is realized.

The invention discloses a directional grouting test device and a visual test method for a goaf, and the method comprises the steps: building a bed rock, laying a mineral product to be mined, laying and filling an area to be reinforced, burying a soil pressure gauge and a water pressure gauge, burying a grouting floral tube, arranging a grouting inner tube, communicating a grouting system, and setting a particle imaging velocimeter PIV. In the test process, the seepage and diffusion process in the slurry and the stress state of the rock-soil body are monitored by using a soil pressure meter and a water pressure meter; calculating the total amount of slurry flowing into the model through a slurry barrel outer scale; after grouting is finished, original-state sampling is conducted on the grouting permeation reinforcement area, a mechanical property test and a microcosmic test are conducted, and the grout permeation and reinforcement effect is analyzed; the grouting pressure-seepage distance-mechanical property relation is obtained. The goaf directional grouting permeation simulation device can carry out goaf directional grouting permeation simulation, facilitates mechanical property test of original state sampling, and has the characteristics of visualization, simulation, monitoring and the like.

The utility model discloses an anti-blocking type side slope grouting drill bit, which belongs to the technical field of side slope protection and comprises a grouting pipe and a grouting drilling tool, the grouting drilling tool is mounted at the bottom end of the grouting pipe in a threaded manner, and inner cavities of the grouting drilling tool and the grouting pipe are provided with grouting channels; the grouting drilling tool is composed of a drilling pipe and a drill bit, the top end of the drilling pipe is in threaded connection with the grouting pipe, and the bottom end of the drilling pipe is in threaded connection with the drill bit. A sealing structure is fixedly installed in an inner cavity of the drill pipe, an adjusting structure is slidably installed at the bottom end of the drill bit, a driving disc is driven through an electric rod in the sealing structure, a sealing block is driven by a transmission folding frame to unfold or contract along a moving groove, self-adaptive adjustment is achieved in cooperation with a piston pipe and an air injection pipe, and the sealing structure can be tightly attached to the inner walls of grouting holes with different diameters; effective plugging is formed, the risk that grout flows back to the outside of the drill hole along the drill hole due to untight sealing is effectively reduced, the reinforcing effect of grouting is enhanced, a slope rock-soil body is fully reinforced, and the stable grouting pressure and the reinforcing effect are guaranteed to a certain extent.

Ball valves, ball elements used therein, and processes for using same in cutting operations and fluid or slurry flow regulation feature a second set of ball rotation pins that mount to a second piston that is hydraulically driven in the opposite direction of a first piston. In certain embodiments the pistons move perpendicularly to a direction of flow through the ball valve.

The invention relates to a turbine flowmeter suitable for slurry flow measurement and a method for reducing abrasion, and belongs to the technical field of well cementation grouting metrology. The turbine flowmeter comprises a flow pipe body used for feeding formula slurry, and the periphery of the flow pipe body is connected with a plurality of detachable sensor seats; the two retainers are connected to the two ends of the flow pipe body respectively. The shaft sleeve is inserted into one end, facing the flow pipe body, of the retainer; the impeller shaft is inserted into the shaft sleeve and rotates in the shaft sleeve, and the impeller shaft and the flow pipe body are coaxially arranged; the impeller is coaxially connected with the impeller shaft; the technical problems that in the prior art, when a turbine flowmeter is used for mud flow measurement, precision is low, and abrasion resistance is poor can be solved.

The utility model discloses a grouting device for overlying strata separation layer grouting construction, and particularly relates to the technical field of grouting pipes, the grouting device comprises a grouting pipe body, supporting frames are arranged on the inner surface of the grouting pipe body, a cleaning device is arranged between the two supporting frames, the cleaning device comprises a casing pipe, and the casing pipe is sleeved on the supporting frames. A rotating rod is rotatably installed on the inner surface of the sleeve, a spiral groove is formed in the inner wall of the sleeve, a vertical groove is formed in the upper end of the rotating rod, a sliding block is slidably installed on the inner surface of the vertical groove, a spiral magnet sliding in the spiral groove is further fixed to one end of the sliding block, and a cleaning assembly is arranged on the outer surface of the sleeve. According to the grouting device for overlying strata separation layer grouting construction, the design of the cleaning device is adopted, and when the spiral scraping plate rotates and moves downwards through inclination of the spiral scraping plate, grout gradually flows downwards along the inclined face of the spiral scraping plate, so that the grout is discharged out of the bottom of the grouting pipe body, and cleaning of the grouting pipe body is facilitated.

The invention discloses an unsteady slurry diffusion process simulation method and system considering a slurry-rock coupling effect, and belongs to the technical field of rock mass engineering grouting, and the method comprises the following steps: step 1, defining basic assumptions of slurry and fractures; step 2, establishing a slurry flow control equation and a fracture deformation control equation based on basic assumptions of slurry and fractures; step 3, based on the slurry flow control equation and the fracture deformation control equation, establishing an unsteady slurry-rock coupling pressure control equation; 4, initial conditions, boundary conditions and grouting conditions are established based on basic assumptions of grout and fractures, and an unsteady grout diffusion model considering the grout-rock coupling effect is established in combination with an unsteady grout-rock coupling pressure control equation; and 5, carrying out numerical solution on the unstable slurry diffusion model by adopting a finite volume method. The method is suitable for grouting design and optimization in the fields of tunnel engineering, mine engineering, geological disaster prevention and control and the like, and theoretical support and technical guidance can be provided for engineering practice.

The invention discloses a three-dimensional slit coating simulation method and system, electronic equipment and a computer readable storage medium. The three-dimensional slit coating simulation method comprises the following steps: establishing a three-dimensional geometric model of a coating machine die head; performing grid division on the three-dimensional geometric model; establishing a slurry flow two-phase flow model in the three-dimensional flow field; setting solving parameters, slurry attributes and boundary conditions of a slurry flow model, wherein the boundary conditions comprise a speed inlet and a pressure outlet of slurry and a foil moving wall surface; carrying out initialization solution on the slurry flow model based on the boundary condition, and ending when calculation reaches a convergence condition; and running simulation, analyzing the change of flow velocity distribution and pressure distribution of the slurry in the three-dimensional geometric model, and observing the three-dimensional flow characteristics of the slurry in the three-dimensional geometric model. According to the invention, the flow behavior of the slurry in the coating process can be accurately predicted, especially the problems of edge thickness change and coating uniformity at a slit outlet are solved.

The invention discloses a control method, device and equipment of a semi-dry method deacidification system and a medium, and relates to the technical field of household garbage incineration power generation treatment. Determining a prediction error value and inputting the prediction error value into a feedforward controller of the first PID controller; the feed-forward controller determines a lime slurry flow feed-forward compensation value according to the prediction error value; based on the lime slurry flow feedforward compensation value, a lime slurry flow error compensation value output by a main controller of the first PID controller and the actually measured lime slurry flow serving as a disturbance compensation value, a first control instruction used for controlling the opening degree of a lime slurry adjusting valve is output through an auxiliary controller of the first PID controller. The method is suitable for a control scene of a semi-dry deacidification process.

The invention is applied to the technical field of lithium battery processing, and discloses a lithium battery slurry efficient mixing processing device based on slurry flow control, the lithium battery slurry efficient mixing processing device comprises a mixing barrel, the upper end of the mixing barrel is fixedly provided with an upper cover through a bolt, and the lower end face of the mixing barrel is fixedly provided with two electromagnetic valves; a slurry flow guide mechanism is arranged in the mixing barrel and the upper cover, and mixing of raw materials is enhanced through flow guide and disturbance of slurry. According to the lithium battery slurry efficient mixing processing device based on slurry flow control, through cooperation of the slurry flow guide mechanism, the center cylinder, the center column, the discharging groove, the discharging rod and other components, directional flow guide can be conducted on slurry, raw materials flow according to a preset path, and the problems that a traditional device cannot control the slurry flowing path, and the slurry flow control efficiency is high are effectively solved. The slurry mixing device solves the problem that local mixing is not uniform due to uniform mixing of the slurry, ensures the uniformity of slurry mixing, realizes ordered conveying of the slurry through the synergistic effect of structures such as a flow guide column, a feeding groove and a flow guide rod, and further improves the mixing effect.

The invention discloses dispersing equipment. The dispersing equipment comprises a dispersing part and a driving part, the dispersing component comprises a rotating shaft, a dispersing machine and a centrifugal pump. The dispersion machine comprises a dispersion main body and a screen cylinder. And the dispersing main body is provided with a dispersing cavity for accommodating the screen barrel. The centrifugal pump comprises a pump shell and an impeller. The rotating shaft is sequentially and fixedly connected to the screen barrel and the impeller. The pump shell is provided with a pump cavity, a feeding port and a discharging port. The impeller is arranged in the pump cavity. The discharge hole is formed in the end part, far away from the dispersion machine, of the pump shell. The pump shell is provided with a side flow channel. And a discharge port is formed in the discharge end of the side runner. And the feeding end of the side runner and the feeding hole are oppositely arranged in the axial direction of the rotating shaft. And the feed port, the pump cavity, the side runner, the discharge port and the dispersion cavity are sequentially communicated and form a slurry runner. And the driving part is fixedly connected with the rotating shaft and is used for driving the rotating shaft to drive the screen barrel and the impeller to rotate, so that the control difficulty of the material retention time and the shearing strength is reduced, the consistency of material characteristics is improved, and the material dispersion quality is improved.

A rock housing for horizontal directional drilling machine includes a cylindrical housing body with walls defining a longitudinal cavity. A bearing assembly is provided as a part of the housing and is located above a bit box region of the housing. The bearing assembly is lubricated by drilling mud which flows through the drill string of the drilling machine, which mud flow is normally used for cooling the drill bit and removing cuttings. A portion of the drilling mud is diverted and passes through a gap formed between the bearing races of the bearing assembly, the gap being sized so as to create the necessary back pressure to divert the needed flow of drilling mud to the assembly.

The invention relates to the technical field of mining machinery, and discloses a portable drilling device for ground source heat energy construction, comprising: a frame of a movable structure; the screwed joint is rotationally mounted on the frame, external threads are arranged on the outer side of the screwed joint, and slurry flows in the screwed joint; the rod dismounting barrel is integrally connected to the lower side of the threaded connector; the lifting groove is formed in the outer side of the rod unloading cylinder and is in an inverted L shape; external threads and internal threads are respectively arranged at two ends of the drill rods; the outer convex shell is connected to the outer ring side of the internal thread end of the drill rod; the through hole is formed in the side wall of the drill rod, so that the inner side of the drill rod is communicated with the interior of the outer convex shell; the upper end of the limiting plate is rotationally mounted at the upper part inside the through hole; the elastic piece is connected between the limiting plate and the inner side of the outer convex shell, so that the lower end of the limiting plate rotates into the drill rod; according to the invention, the integrally-connected rod dismounting cylinder is adopted, so that an independent rod dismounting device does not need to be mounted and dismounted, and the loss risk is avoided; and in cooperation with the drill rod with the elastic limiting plate, the rod dismounting action is accurate and stable, and the rod dismounting efficiency is improved.

The invention discloses an ultra-large-diameter slurry shield deslagging parameter optimization method, system and device and a storage medium. The method comprises the following steps that a three-dimensional model is constructed; establishing a motion simulation model; the motion simulation model solves a flow process equation of a slurry fluid phase and a motion control equation of a rock slag particle phase according to the deslagging parameters, so that flow field distribution characteristics and rock slag migration behaviors in the excavation bin and the air cushion bin are obtained; obtaining an evaluation index of the deslagging performance, and judging whether the evaluation index meets a preset requirement or not. According to the method, a fluid phase flow equation and a particle phase motion control equation are solved by utilizing the simulation model, and an interaction mechanism of the slurry and the rock slag is defined, so that simulation is closer to a real situation; and dynamic adaptation of slag discharge parameters with a complex pipe network system and actual construction working conditions is realized. The probability of detention and accumulation of rock slag at the bottoms of the excavation bin and the air cushion bin is remarkably reduced, equipment abrasion is reduced, abnormal tunneling parameters are avoided, and stability and continuity of shield tunneling are guaranteed.

The invention belongs to the technical field of porous tantalum carbide ceramic preparation, and particularly relates to a preparation method of porous tantalum carbide ceramic based on a broken framework, which comprises the following steps: S1, preparing dipping slurry; s2, a polyurethane foam template is immersed in the dipping slurry, the polyurethane foam template is fully pressed so that the holes can be filled with the slurry, and the template is repeatedly rolled through a roller till no slurry flows out of the template; s3, drying the impregnated template, performing high-temperature treatment on the dried template, and cooling to room temperature to obtain a porous tantalum carbide framework; s4, crushing the porous tantalum carbide skeleton into a crushed skeleton with the size of 0.1-5 mm; s5, preparing a phenolic resin solution, mixing the crushed framework with the phenolic resin solution, then transferring the mixture into a mold, and forming after applying a certain pressure to obtain a porous tantalum carbide green body; the crushing brackets are stacked and spliced together to form a porous structure, the pores of a finished product can be adjusted by changing the sizes of the crushing brackets, and the crushing bracket can be applied to finer pores and is extremely low in shrinkage rate.

The embodiment of the invention provides a riverway dredging flow control method and system, and relates to the technical field of riverway dredging flow control, the method comprises the steps that operation data of a riverway dredging system are collected, and the operation data comprise a flow meter feedback value, mud pump operation parameters, pipeline pressure, valve opening and mud concentration; based on the operation data, the abnormal types of the river dredging system are recognized, and the abnormal types comprise flowmeter measurement errors, valve mechanical response hysteresis and slurry rheological characteristic anomalies; and adjusting a control strategy according to the exception type. The river dredging operation efficiency, the equipment safety and the environmental protection level can be improved.

The invention provides a grouting diffusion three-dimensional monitoring system and method and a medium, and relates to the technical field of railway roadbeds, and the system comprises an acquisition module and a data processing module; the acquisition module is used for acquiring apparent resistivity corresponding to a grouting diffusion area in a railway roadbed in parallel; and the data processing module is connected with the acquisition module and is used for performing forward modeling and inversion according to a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range. Thus, on one hand, the collection efficiency of apparent resistivity is improved, on the other hand, a three-dimensional apparent resistivity map can be obtained, three-dimensional real-time monitoring of the slurry flow path, the flow range, the spatial and temporal distribution and the occurrence state in the grouting process is achieved, the slurry diffusion condition is accurately and visually reflected, and the grouting quality is improved. And a basis is provided for grouting reinforcement mechanism research, technical development and scheme optimization.

The invention discloses a fractured rock mass grouting reinforcement process simulation method, device, equipment and medium, and is applied to the field of underground engineering, and the method comprises the following steps: constructing a rock mass grouting model of a target fractured rock mass, retrieving and updating a slurry flow network composed of a fracture network communicated with a grouting pressure boundary, and simulating the grouting reinforcement process of the target fractured rock mass. Calculating a slurry real-time diffusion state quantity of the slurry flow network based on the slurry flow network, converting a pressure component into a nodal force, calling a finite discrete element mechanical solver, updating structural response state data of the rock mass grouting model according to the nodal force and obtaining a failure joint unit, and updating the slurry flow network according to the failure joint unit, and the alternate solving step is executed circularly until a preset termination condition is met, and therefore numerical simulation of the fractured rock mass grouting-reinforcing process is completed. According to the method, manual intervention is remarkably reduced, the geometric fidelity is improved, newly-generated failure joint units are automatically recognized and immediately merged into a grout flow network, and the accuracy of grouting reinforcement simulation is improved.

The utility model relates to the technical field of foaming devices of beverage equipment, in particular to an adjustable backpressure foaming device and brewing equipment, which comprise a backpressure main body and a foaming component, the backpressure main body is provided with a flow guide hole and a liquid outlet cavity, the liquid outlet cavity is arranged at the lower end of the backpressure main body, and the foaming component is arranged in the liquid outlet cavity. The flow guide hole is communicated with the upper end of the backpressure main body and the liquid outlet cavity, so that edible raw material slurry flowing in from the upper end flows into the liquid outlet cavity through the flow guide hole; the foaming assembly is adjustably mounted in the liquid outlet cavity, so that the edible raw material slurry flowing into the liquid outlet cavity is subjected to high-frequency oscillation when flowing through the foaming assembly, and foamed mixed slurry is formed and flows out from a liquid outlet of the foaming assembly. In conclusion, when the coffee machine is used for brewing coffee, different foam quantities, sizes, richness or fineness can be generated, so that coffee solutions with different flavors are provided, the taste of the coffee is enriched, the requirements of different people for the taste of the coffee can be met, and the market competitiveness of the product is further enhanced.

The invention discloses a microorganism solidification inclined deposition surface sandy soil hollow cylinder sample preparation device and a use method. The sample preparation device comprises a hollow cylinder mold and a supporting pedestal for the hollow cylinder mold to rotate. One end of the hollow cylindrical mold can be lifted to a proper angle through a supporting rod with threads and a U-shaped hoop which are arranged on a supporting pedestal, so that a deposition surface inclined at any angle of a sample is vertical to the ground; a peristaltic pump is connected with a grouting channel distributed on the inner cylinder, and grout is input into the hollow cylindrical sample. Slurry can flow along the deposition surface under the action of gravity, the phenomenon that microorganisms are preferentially attached to the area close to the grouting hole is weakened while the grouting efficiency is improved, disturbance of slurry flowing to the inclined deposition surface of the sample is reduced, and the problems that a traditional grouting method is low in efficiency and large in disturbance to the sandy soil sample on the inclined deposition surface are solved. Therefore, the stability of the inclined deposition surface of the sample is ensured, and the preparation quality and test result reliability of the microorganism solidification inclined deposition surface sample are improved.

The invention provides a mixing pile online monitoring method and device and electronic equipment, and relates to the technical field of mixing pile monitoring, and the mixing pile online monitoring method comprises the steps that drill rod inclination angle data, slurry flow data, cement consumption quality data and drill rod displacement data are acquired; coordinate transformation is conducted on the drill rod dip angle data and the drill rod displacement data, and the actual pile depth of the drill rod is calculated; performing double-source verification on the slurry flow data and the cement consumption quality data to generate effective cement consumption; constructing a pile body quality risk matrix model based on a preset pile depth threshold value, a cement consumption safety standard and a drill rod speed specification; inputting the actual pile depth of the drill rod, the effective cement dosage and the real-time drilling speed into the risk matrix model, and outputting a risk grade index; and when the risk grade index exceeds a preset threshold value, a regulation and control signal containing a drilling speed correction instruction, a grouting amount compensation instruction or an equipment locking instruction is generated. Accurate control over the pile depth is achieved, the cement consumption deviation is obviously lower than the industrial standard, and the risk of jerry work and material reduction is reduced.

The embodiment of the invention discloses a multivariable dynamic collaborative optimization control method for waste incineration flue gas deacidification, and relates to the technical field of waste incineration flue gas deacidification intelligent control. The method comprises the steps that real-time data are acquired and preprocessed, and a temperature-pressure coupling coefficient KT-P is calculated; calculating a rule weight Wi by using the preprocessed real-time data and the temperature-pressure coupling coefficient KT-P; the rule weight Wi is utilized, after fuzzy rule matching is conducted, a preliminary control quantity delta Qslurry is output, and delta Qslurry is the slurry flow variable quantity; performing prediction-energy efficiency optimization, solving an optimal control quantity through a target function and constraint conditions and quadratic programming, and outputting an optimization instruction to an execution mechanism; and updating the rule base according to the current system state and a preset reward function. According to the method, the problems of low control precision and high operation cost in the existing desulfurization and deacidification process of the waste incineration flue gas can be solved, and the environmental benefits and economic benefits of a waste incineration plant are improved.

The invention belongs to the technical field of ore dressing equipment, and particularly relates to a spiral chute ore dressing machine for mineral particles, which comprises a bracket, a spiral chute I and a spiral chute II which are centrosymmetric are connected to the bracket, vertical plate parts are arranged on the edges of the two sides of the spiral chute I and the spiral chute II, and a fixed cover is connected to the upper part of the bracket; a lifting plate capable of sliding up and down is arranged in the fixed cover, two pairs of spiral extrusion vertical plates attached to the inner side of the vertical plate part are connected to the lifting plate, and a feeding pipe with two feeding ends is arranged below the fixed cover. Ore pulp flowing out of the feeding pipe flows downwards along the first spiral chute and the second spiral chute, under the action of centrifugal force and gravity, minerals with different densities are zoned in the first spiral chute and the second spiral chute, the rotating rotating column enables the spiral material extruding vertical plate to move up and down in a reciprocating mode through the oval groove and the protruding block, and the materials are extruded through the spiral material extruding vertical plate. And the spiral material extruding vertical plate intermittently extrudes ore pulp at the vertical plate part through the inclined surface, so that the ore pulp is prevented from being retained at the edge, the cleaning difficulty is reduced, and the separation efficiency and separation effect of the ore pulp are ensured.

A slurry arm for an associated chemical mechanical polishing (CMP) system for semiconducting wafer substrates includes a slurry arm main body; a plurality of holes disposed along a length of the slurry arm main body; a valve controlling slurry flow through each hole of the plurality of holes; and a controller configured to open or close each valve.

The invention discloses a conical cement pole production auxiliary forming device, which belongs to the technical field of building material production and comprises a rotating speed optimization system. The method comprises the following steps: constructing a concrete pole characteristic model, a fluidity evaluation model and an aggregate analysis model by acquiring geometric characteristics (wall thickness, length and diameter ratio) of a concrete pole, cement slurry fluidity (slump and viscosity) and aggregate information (particle size and density), and outputting an aggregate-flow adaptation degree; and dynamically adjusting the rotating speed of the mold by combining the cement paste temperature and utilizing the rotating speed basic model and the optimization model. The problems of non-uniform compactness and aggregate distribution defects caused by fixed rotating speed in a traditional centrifugal process are solved, and the forming quality and the structural strength of the conical concrete pole are remarkably improved.

The utility model relates to a grouting anchor rod with double locking of a tray, which belongs to the technical field of engineering structure supporting appliances and comprises a hollow rod body, external threads are arranged on the outer wall of the hollow rod body, and the hollow rod body is used for being inserted into an anchor hole in a rock mass; the anchor rod head is connected to one end of the hollow rod body and located in the anchor hole, a slurry flowing hole is formed in the anchor rod head, and the slurry flowing hole is communicated with an inner hole of the hollow rod body; the tray is provided with a center hole, the hollow rod body is connected to the center hole in a penetrating mode, and the tray is further provided with a mounting hole which is located at the position close to the edge of the tray; the nut is in threaded connection with the hollow rod body, the nut and the anchor rod head are located on the two sides of the tray respectively, and the nut is used for pressing the tray on the rock wall of the rock mass; the lock rod is connected in the mounting hole, a lock hole located on the side of the anchor hole is further formed in the rock mass, the lock rod is inserted into the lock hole and locked in the lock hole, and the lock rod tightly presses the tray. The tray of the grouting anchor rod of the structure is doubly pressed on the rock wall through the nut and the locking rod.

The utility model provides pulping equipment. The pulping equipment comprises a circulating tank, a guide cylinder and a dispersing device, the circulation tank is used for containing slurry. The guide cylinder is arranged in the circulating tank, a containing cavity is formed in the guide cylinder, the outer wall of the guide cylinder and the inner wall of the circulating tank are spaced to form a guide channel, and an extension plate is arranged on the inner wall of the guide cylinder and extends in the radial direction of the guide cylinder. The dispersing device is at least partially located between the bottom of the guide cylinder and the bottom wall of the circulating tank, the dispersing device is provided with a flow inlet and a flow outlet, the flow inlet is located in the side, close to the bottom of the guide cylinder, of the dispersing device and communicated with the containing cavity, the flow outlet is located in the peripheral side of the dispersing device and communicated with the guide channel, and the dispersing device is used for dispersing the slurry. Therefore, the dispersing device can disperse and circulate the slurry in the circulating tank, and the slurry is rectified through the extension plate to flow towards the dispersing device, so that the structure of the pulping equipment is simplified, and the occupied space of the pulping equipment is reduced.

The utility model discloses ammonia nitrogen removal equipment for anaerobic fermentation biogas slurry, and belongs to the field of ammonia nitrogen removal and recycling of anaerobic fermentation biogas slurry. All deaminated biogas slurry flows back to the anaerobic fermentation system by virtue of a steam stripping flash evaporation deamination technology, an ammonia absorption technology, an evaporative crystallization technology, a mud-mud heat exchange technology and the like. An adopted flash evaporation deamination tower (3) is internally divided into a plurality of areas, ammonia-containing biogas slurry sequentially flows through the areas and is in countercurrent contact with circulating steam and fresh steam in the areas, ammonia nitrogen in the biogas slurry is removed through steam stripping and flash evaporation, and the generated deaminated biogas slurry completely flows back to an anaerobic fermentation system; ammonia in the ammonia-containing steam is absorbed by dilute sulfuric acid in an ammonia gas absorption tower (9), an ammonium sulfate solution is generated and sent to an evaporative crystallization tank (16), indirect heating and circulating evaporative crystallization are adopted, and solid ammonium sulfate is transported outwards; the mud-mud heat exchanger (2) is suitable for heat exchange between non-Newtonian fluid materials. Biogas slurry is no longer discharged, and fixed asset investment of anaerobic fermentation projects with the same gas production scale is reduced.

The invention discloses a coal seam roof crack grouting plugging device, and belongs to the technical field of coal seam reinforcement, the coal seam roof crack grouting plugging device comprises an air pressure conveying structure, the outer wall of the air pressure conveying structure is fixedly connected with a feeding head, and the upper end of the feeding head is fixedly connected with a material conveying pipe used for conveying plugging materials; the end, away from the feeding head, of the conveying pipe is fixedly connected with a mixing pipe. When the device is used, slurry flows towards the direction of the soft sleeve when the crack is filled with the slurry, and the slurry pushes the adjusting pipe through the soft sleeve to compress and support the spring pipe, so that the distance between the soft sleeve and the top end of a drill hole is expanded, and the crack which is originally located on the rear side of the soft sleeve is filled; in this way, the problem that due to the fact that the pressure in the drill hole is too large, grout extrudes a crack, and the crack is expanded can be solved, and the method can be suitable for coal seam cracks in different states.