126results about How to "Improve sand removal effect" patented technology

The invention relates to a sand-discharge facility at a water inlet of a hydraulic power station, wherein the upper course or the lateral direction of a sand-discharging bottom hole (a sand flushing gateway) is provided with a grid-type sand-discharging gallery, and the basic body shape of the sand-discharging gallery is that the upper portion of a sand-sinking tank is provided with a grid-type top board. The sand-discharge facility at a water inlet of a hydraulic power station of the invention can achieve excellent sand-discharging effect.

The invention relates to a sediment releasing method for a water intake of a low-head river channel pivotal power station and belongs to the field of water conservancy projects, under the IPC numbers of E02B9 / 00, E02B9 / 04 and E02B1 / 00. According to the method, a sediment trap is arranged along the whole front edge of the power station water intake, a gallery for sediment transport is arranged in front of the sediment trap and connected with a dam base sediment tunnel, the top of the gallery for sediment transport is provided with a horizontal joint sediment outlet, the width of the horizontal joint sediment outlet gradually increases from the upstream, the cross section of the gallery for sediment transport gradually increases from the upstream. The sediment trap is used with the variable width joint type gallery for sediment transport so as to achieve the function of an intercepting channel, an elongated scour funnel can be formed in front of the sediment trap, and the sediment releasing effect that sediment is released in front of the power station water intake is truly achieved.

The invention belongs to the technical field of sewage treatment, particularly relates to devices for removing inorganic particles in a sewage treatment system, aims to provide a new selection for solving the technical problem in removing the inorganic particles in the sewage treatment system, and provides the two devices for removing the inorganic particles in the sewage treatment system. Each device respectively comprises a grit basin pre-treatment system and a sludge inorganic particle separating system which are connected through a pipeline. The invention further provides a method for sewage treatment by adopting the devices. The devices disclosed by the invention can be used for efficiently removing the inorganic particles in the sewage treatment system.

Disclosed is a Mastra tomato catsup processing method, including the following steps: grinding Mastra meat, then washing and dehydrating to prepare the main material; peeling the tomatoes, bloating with brine, and grinding to prepare tomato catsup; adding appropriate amount of edible oil in a pan, heating, sequentially adding the main material, auxiliary materials and prepared seasoning matters and additives, adding appropriate amount of water, boiling until most of the water is evaporated, adding appropriate amount of monosodium glutamate, and mixing to be even; cooling naturally and filling when the catsup is hot. The invention solves the technical difficulty that due to large content of sand, Mastra meat is unsuitable to be processed, utilized and eaten. The invention adopts special preparing and processing techniques and the prepared product is delicious in flavor and rich in nutrition and can better satisfy the food demand of the consumers.

Disclosed is a Mastra meat-fish ball processing method, including the following steps: grinding fresh Mastra meat, washing to get rid of the silt and dehydrating to prepare main material; mixing above main material and prepared minced fillet according certain proportion, adding auxiliary materials, seasonings and additives in necessary amounts, shredding and mixing to be even, then adding appropriate amount of water and mixing to be even to make fillings with moderate hardness and stickiness; processing according to different requirements, packing and making into finished products. The processing method solves the technical difficulty that due to large content of silt, Mastra meat is unsuitable to be processed and eaten. Through special preparing and processing techniques, the processed product is delicious in taste and flavor and rich in nutrition, and can better satisfy the food demand of the consumers.

The invention discloses a novel plunger applicable to sand-producing fluid-producing gas well plunger lifting techniques. The novel plunger comprises a fishing head 1, a sand scraping structure 2, a seal structure 3, a sand discharge structure 4 and a spiral structure 5 sequentially from top to bottom. The fishing head is arranged at the top. The sand scraping structure is arranged on the upper portion and is in a structure of a cone frustum and a cylinder; the surface of the sand scraping structure is provided with scraping grooves 6. The seal structure is arranged in the middle and is in a two-layer combined structure; a steel rod is arranged inside the seal structure; the surface of the seal structure is made of nylon wear-resistant material and provided with 11 grooves 7; a protrusion is arranged between each two grooves. The sand discharge structure is arranged on the lower portion and is in a cylindrical structure; the surface of the sand discharge structure is provided with sand discharge grooves 10. The spiral structure is arranged at the bottom; the surface of the spiral structure is provided variable pitch spiral blades 11. A principle of the novel plunger is reliable; the novel plunger is reasonable in structure; after the novel plunger is arranged in an oil tube, the problems that plunger sand jamming or unsmooth operation or the like in the lifting, drainage and gas production process are solved, and the defects of the prior art are overcome.

The invention provides a sand control technology for loose sandstone. Before sand control, by foam huff and negative-pressure mixed arrangement, the foam is used to discharge reservoir sand and clay particle fully, which are distributed unevenly near borehole zone; than high-pressure gravel is filled to sand control, even gravels are filled in the deficit stratum near borehole to improve the seepage behavior near borehole zone. The invention changes the seepage behavior of uneven stratum near borehole zone in basic, improves the well production rate, reduces the plugging near borehole zone by solid particles such as fine-silt sand, clay particle and so on in effect, and prolongs the valid period of sand control.

The invention relates to a sediment releasing system for a water intake of a low-head river channel pivotal power station and belongs to the field of water conservancy projects, under the PIC numbers of E02B9 / 00, E02B9 / 04 and E02B1 / 00. The system is characterized in that a sediment trap is arranged along the whole front edge of the power station water intake, a gallery for sediment transport is arranged in front of the sediment trap and connected with a dam base sediment tunnel, the top of the gallery for sediment transport is provided with a horizontal joint sediment outlet, the width of the horizontal joint sediment outlet gradually increases from the upstream, the cross section of the gallery for sediment transport gradually increases from the upstream. The sediment trap is used with the variable width joint type gallery for sediment transport so as to achieve the function of an intercepting channel, an elongated scour funnel can be formed in front of the sediment trap, and the sediment releasing effect that sediment is released in front of the power station water intake is truly achieved.

The invention relates to a scraping plate mixing and stirring sand removing device which has a good sand removing effect and a simple structure, is economic, reasonable and durable, is convenient to use and makes production more stable. The device comprises a mixing tank, wherein the lower side of the mixing tank is communicated with a conical hopper; a rotating vertical shaft is arranged in the mixing tank and the conical hopper in a relative rotating mode; the upper end of the rotating vertical shaft is in transmission connection with a motor; stirring blades are fixedly arranged on the rotating vertical shaft; a tank bottom is arranged at the lower end of the conical hopper; a sand settling pit is arranged on one side of the tank bottom and communicated with the conical hopper; the altitude of the bottom wall of the sand settling pit is lower than that of the tank bottom; a sand conveyer is arranged in the sand settling pit; a bottom opening of the sand conveyer is positioned in the sand settling pit; an upper opening of the sand conveyer is positioned outside a space where the mixing tank, the conical hopper and the sand settling pit are positioned; the lower end of the rotating vertical shaft is fixedly connected with a scraping plate arm; scraping plates are fixedly arranged below the scraping plate arm and contacted with the tank bottom; and part of the horizontal projection of a rotating track of the scraping plate arm is positioned in the sand settling pit.

The invention relates to a municipal sewage sand removing device and method, in particular to a multifunctional belt type pre-filter, and belongs to the technical field of primary treatment on sewage. The multifunctional belt type pre-filter internally comprises inclined filter cloth (12), a first driving wheel (10) and a second driving wheel (9) are adopted at the upper end of the filter cloth (12), a driven wheel (3) is adopted at the lower end so that an inclined filter cloth conveying belt structure can be formed by the filter cloth, and a sand extrusion dewatering device (7) is installed in a sand storage chamber (14). Sand removing and dewatering effects are enhanced, and sand filtered out through the filter cloth rotates along with the filter cloth, is swept by brushes into the sand storage chamber and is extruded to a sand outlet through a sand collecting component to complete sand removing and dewatering.

The invention relates to the technical field of geotechnical engineering investigation and geological exploration and discloses a san bailing mechanism. The sand bailing mechanism comprises a bailing bucket which is arranged outside a drill rod and along the axial direction of the drill rod; the bailing bucket comprises a sealing end which is connected with the drill rod and an annular-shaped lateral wall; a gap is formed between the drill rod and the annular-shaped lateral wall, so that sand filling space is formed; an inclined opening is formed in the upper end of the lateral wall; a plurality of sand inlet holes and water outlet holes are formed in the lateral wall. According to the sand bailing mechanism which is arranged on the periphery of the drilling rod, suspending gravel in drilling holes enters into the sand filling space through the inclined opening which is formed in the lateral wall and the sand inlet holes and precipitates in the sand filling space and fluid such as slurry inside the sand filling space is effused through the water outlet holes. The sand bailing mechanism has the advantages of automatically collecting gravel during a process that the drilling tool is drilling holes or tripping out, effectively preventing the gravel precipitating at the hole bottoms, avoiding gravel precipitation causing drilling tool burying accidents, guaranteeing data accuracy of standard penetration tests during an investigation process, enabling the data to reflect characteristics of rock-soil, guaranteeing drilling quality and greatly improving the construction efficiency.

The invention relates to a reinforced rotational-flow sand setting tank which comprises a tank body, wherein a water inlet pipe and a water outlet pipe are arranged at the upper part of the tank body;a water inlet and a water outlet are formed at the joints between the water inlet pipe and the water outlet pipe and the tank body respectively; the water outlet pipe passes through an inner cylinderand extends into the inner cylinder; a manhole is formed in the lower part of the tank body; the inner cylinder, an annular sloping plate and a fair water cap are arranged in the tank body from top to bottom; a flow guide plate is arranged between the inner cylinder and the tank body; the flow guide plate is of a spiral shape; one end of the flow guide plate is located above the water inlet, andthe other end clings to the lower side of the cross-pipe outer wall of the water outlet pipe; the two sides of the flow guide plate clings to the outer wall of the inner cylinder and the inner wall ofthe outer cylinder respectively; a bottom opening is formed in the inner cylinder and the annular sloping plate respectively; the bottom of the inner cylinder extends into the inner side of the annular sloping plate and reaches the lower middle part of the annular sloping plate; the fair water cap extends into the annular sloping plate through the bottom opening of the annular sloping plate; andthe bottom of the inner cylinder is located above the fair water cap. The reinforced rotational-flow sand setting tank has an advantage that high head pressure or power equipment is not required.

The invention discloses a steel mould sand coating casting method which comprises the following steps: 1) cleaning a steel mould; 2) covering sand; 3) compounding the moulds; 4) melting liquid iron; 5) casting; 6) removing casting cap opening; 7) opening the mould; 8) removing the sand. The steel mould sand covering casting method is a casting technology method for coating a layer of thin moulding sand on the periphery of a metal mold inner chamber, and is a combination of two methods of the metal mold casting and shell mould casting; the acquired casting has the advantages that the dimensional precision is high, the mechanical property is good, the manual work, the material and the equipment are saved, and the manufacturing cost is low; moreover the steel mould can be repeatedly used; the working efficiency is improved.

The invention relates to a method for producing ethanol by adopting cassava, in particular to a desanding method used in process for producing ethanol by adopting cassava, which is characterized by comprising the following steps in production: feeding of sand-containing cassava into a feed bin, blending of sand-containing cassava starch, first-stage desanding separation, second-stage desanding separation, third-stage desanding separation, fourth-stage desanding separation and sand collection. The desanding method has the advantages of being capable of improving the removal rate of sand in the cassava material (the total removal rate of sand in cassava is only 30 percent currently, and the removal rate of sand is improved to be more than 95 percent), greatly reducing the loss of starch, saving water, improving the energy utilization rate, improving the ethanol yield, and greatly prolonging the service life of alcohol production equipment. The treatment capacity of the sand-containing cassava starch after separation is greatly reduced compared with the material treatment capacity of other desanding technologies, and the desanding effect is greatly enhanced, and the desanding cost is reduced. the method has remarkable technical progress.

The invention discloses a device for removing sand on a casting blank conveniently and relates to the technical field of mechanical equipment. The device for removing the sand on the casting blank conveniently comprises a handle. A shell is connected to one side of the handle in a clamped mode, and a fixed block is fixedly connected to the bottom of the inner wall of the shell. A first motor is fixedly connected to the top of the fixed block, and an output shaft of the first motor is fixedly connected with a first belt wheel. The surface of the first belt wheel is in transmission connection with a second belt wheel through a belt, a cam is fixedly connected to the back side of the second belt wheel, and a push rod is arranged on one side of the cam. The end, away from the cam, of the pushing rod penetrates through the shell and extends out of the shell. The end, located outside the shell, of the push rod is fixedly connected with a fixed box. By adoption of the device for removing the sand on the casting blank, sand blocks on the inner wall of a casting can be polished away easily, sand blocks located at corners of the casting can be knocked down, and time and labor are saved; and the sand removing effect is good, and finish machining can be conducted conveniently.

The invention discloses a multi-reverse-slope type stilling pool which comprises a bottom plate and side walls on the two sides of the bottom plate. An apron used for connecting the stilling pool and a downstream bed is arranged at the downstream tail end of the stilling pool. The portions, along the two side walls of the stilling pool, of the bottom plate of the stilling pool are each provided with a side wall reverse slope connected with a flow guide slope. The slope aspect of the side wall reverse slopes is parallel to that of the two side walls. The structure and the size of the side wall reverse slopes are the same as those of the side walls. Multiple middle reverse slopes are arranged on the portions, between the two side wall reverse slopes, of the bottom plate of the stilling pool at intervals, wherein the structure and the size of the middle reverse slopes are the same as those of the side wall reverse slopes, and the middle reverse slopes are connected with the flow guide slopes. A connecting slope is arranged at the tail end in the water flow direction of each side wall reverse slope, wherein the slope aspect of the connecting slope is opposite to that of the side wall reverse slope, the connecting slope is as tall as the side wall reverse slope, and the connecting slope is used for connecting the side wall reverse slope and the apron. A connecting slope is arranged at the tail end in the water flow direction of each middle reverse slope, wherein the slope aspect of the connecting slope is opposite to that of the middle reverse slope, the connecting slope is as tall as the middle reverse slope, and the connecting slope is used for connecting the middle reverse slope and the apron. Horizontal sand flushing channels penetrating the stilling pool longitudinally are formed in the portions, between the side wall reverse slopes of the bottom plate of the stilling pool, between the middle reverse slopes and between the connecting slopes, of the bottom plate of the stilling pool. The stilling pool can increase the energy consumption rate and reduce the problem of sediment accumulation in the stilling pool.

The invention discloses a cyclone desander for a wellhead of an oil field, and particularly relates to the field of desanders. The cyclone desander for the wellhead of the oil field comprises a support, a pressure regulating valve, a barrel, connecting screw rods and a flange. A liquid inlet and a liquid outlet are arranged at the two ends of the barrel separately, the pressure regulating valve and the flange are mounted in the liquid inlet and the liquid outlet of the barrel respectively, a communication hole is formed in the bottom of the barrel, and a connecting flange, a valve, a desandingflange and a sand setting body are installed at the bottom of the barrel through connecting nuts. A set of independent self-operated pressure regulating valve without power supply at the liquid inletis arranged, through pressure changes of oil liquid at the liquid inlet, small pressure changes of the oil liquid at the liquid inlet are amplified by intelligent control of the valve and fed back totwo pressure chambers of the valve, the opening degree of a valve port is adjusted, the cyclone desander can achieve the purpose of adjusting the pressure of the oil liquid behind the valve without replacing the pipe diameter of an external connecting pipe or replacing desanders of other specifications, and the practicability of the cyclone desander is greatly increased.

The invention discloses an inclined board sand removing water obtaining device. The inclined board sand removing water obtaining device comprises a water outlet pipe and a shell, wherein the whole shell is of a strip shape. The water outlet pipe is fixedly arranged at one end of the shell. The inclined board sand removing water obtaining device is characterized in that the device further comprises an inclined board sand removing mechanism, the inclined board sand removing mechanism comprises multiple inclined boards fixedly arranged in the shell and arranged at intervals in the length direction of the shell, and the upper portion of each inclined board is provided with a water passing hole; the inclined board sand removing mechanism further comprises a water outlet chamber and a sand removing water obtaining chamber; the water outlet chamber is formed between the end, where the water outlet pipe is located, of the shell and the adjacent inclined board; the sand removing water obtaining chamber is formed between the other end of the shell and the adjacent inclined board; the bottom, where the sand removing water obtaining chamber is located, of the shell is provided with two slopes in the length direction, the inner ends of the two slopes face downwards and are adjacent, a sand discharging groove is formed, and each slope is provided with a filter screen structure used for water inflow. The inclined board sand removing water obtaining device has the advantages of being simple in structure, stable in water obtaining function, small in water obtaining resistance, good in sand removing effect, capable of improving the sand removing water obtaining efficiency and suitable for production, popularization and application.

The invention relates to a method for reducing heavily silt-carrying river reservoir deposition, and belongs to the field of water conservancy. The IPC of the method is E02B1 / 00 and E02B9 / 02. According to the method, a sand blocking ground sill is built in a reservoir, the reservoir is divided into a clean water reservoir area and a muddy water reservoir area, distant silt carrying flow on the upstream of a dam is efficiently drained out of the reservoir through sand transporting culverts, the targets of reservoir filling and desilting are achieved, and the reservoir rainfall scouring distance is enlarged. Fine particle sediment overflowing to the reservoir area before the dam from the sand blocking ground sill is discharged out of the reservoir through dam flood discharging tunnel spillways in a submersible sand pumping pump reservoir desilting mode. The wide, shallow and bent deposition forms in the reservoir areas are shaped in a submersible sand pumping pump dredging mode, reservoir area straight river channels of density flow transporting are facilitated, and the natural desilting effect of the reservoirs is improved. The method is used in heavily silt-carrying river reservoir building and deposition waste reservoir reconstruction projects.

The invention discloses a multistage precipitating device for industrial sewage treatment. The device comprises an outer barrel, an inner barrel, a water inlet pipe, a sand collecting hopper, a plurality of supporting legs, a discharge valve I, a plurality of short joints, an annular pipe and a water outlet pipe, wherein the water inlet pipe is arranged on one side of the upper portion of the inner barrel and the water inlet pipe is tangentially connected to the inner barrel; the outer barrel is arranged on one side out of the inner barrel; the short joints which are uniformly distributed arearranged on one side of the upper portion of the outer barrel and are connected to the outer barrel in a through manner; and the short joints are connected to the annular pipe, the water outlet pipe is arranged on one side of the short joints, the sand collecting hopper which is funnel-shaped is arranged on one side of the lower portion of the outer barrel, the supporting legs are arranged on oneside of the outer side of the sand collecting hopper, and the discharge valve I is arranged on one side of the lower portion of the sand collecting hopper. The water inlet pipe is tangentially connected to the inner barrel, sand is removed by rotational flow in the inner barrel to remove most precipitates, and precipitation is performed in the outer barrel, so that the sewage precipitating effectis enhanced, and the sewage precipitating efficiency is improved.

The invention relates to the technical field of water conservancy facilities, and discloses a sediment guide and removal structure for a water conservancy facility. The sediment guide and removal structure comprises a first upper slope surface, a first lower slope surface, a flow guide plane, a second upper slope surface, a second lower slope surface and a riverbed, wherein the first upper slope surface, the first lower slope surface, the flow guide plane, the second upper slope surface and the second lower slope surface are fixedly arranged on the riverbed, a sand pumping groove is formed in the flow guide plane, a filter cage is fixedly connected to the groove bottom of the sand pumping groove, a silt pump is fixedly connected to the inner cage bottom of the filter cage, the output end of the silt pump is connected with a conveying pipe, the other end of the conveying pipe sequentially penetrates through the filter cage, the groove bottom of the sand pumping groove and the riverbed, and guide blocks are fixedly connected between the flow guide plane and the first lower slope surface and between the flow guide plane and the second upper slope surface. According to the sediment guide and removal structure, the cleaning interval time can be manually controlled, the cleaning speed is high, the work amount is small, the manufacturing cost is low, the sediment discharging effect is good, and meanwhile the sediment pump is protected.

The invention belongs to the field of casting equipment, and particularly discloses a casting sand removing device. The casting sand removing device comprises a sand removing box; a horizontal first movable plate and a horizontal second movable plate are sequentially arranged in the sand removing box from top to bottom in a sliding manner; the first movable plate and the second movable plate are both inclined; the first movable plate and the second movable plate are inclined in opposite directions; sand through holes are formed in the first movable plate and the second movable plate; a first push rod is vertically connected between the first movable plate and the second movable plate in a sliding manner; the top end of the first push rod is propped against the first movable plate; the bottom end of the first push rod is propped against the second movable plate; a first passage is arranged at the low end of the first movable plate; a second passage is rotationally connected with the inner side wall of the sand removing box below the first passage; spiral bulges are arranged on the inner wall of the first passage and the inner wall of the second passage; bristles are densely distributed on the bulges; a receiving slot is arranged between the first passage and the second passage; and a second push rod is connected with the receiving slot in a sliding manner. The device can turn over automatically when used for sand removal of castings.

The invention relates to a sediment disposal system for water inlets of a power station, belonging to the field of hydraulic engineering. The IPC (International Patent Classification) numbers of the sediment disposal system are E02B9 / 00, E02B9 / 04 and E02B1 / 00. The sediment disposal system is characterized in that a sediment barrier is laid at the front edge of the water inlet of the power station along the whole line; a sediment transporting gallery is laid in front of the sediment barrier along the whole line and is connected with a sediment disposal hole of a dam foundation; a horizontal seam sediment disposal opening is formed in the top of the sediment transporting gallery; the width of the horizontal seam sediment disposal opening is gradually reduced from the upstream; a cross section of the sediment transporting gallery is gradually increased from the upstream; the sediment barrier is matched with the width-variable seam type sediment transporting gallery for use to play a role of a sediment trapping trough; a strip-shaped flushing funnel can be formed in front of the sediment barrier, so that the sediment disposal effect of cleaning the sediment in front of the water inlet of the power station is really realized.

The invention relates to a rail ballast bed sand removal vehicle, which comprises a vehicle body A and a vehicle body B. The vehicle body A and the vehicle body B are connected through a connecting beam (11), and the vehicle body A comprises a vehicle body A main vehicle frame (33), a vehicle body A front bogie (2) and a vehicle body A rear bogie (9); the front lower part and the rear lower part of the vehicle body A main vehicle frame (33) are provided with the vehicle body A front bogie (2) and the vehicle body A rear bogie (9) correspondingly; the front upper part of the vehicle body A mainvehicle frame (33) is provided with a vehicle body A driver cab (34), and a mechanical sand removal device is fixedly mounted in the middle of the vehicle body A main vehicle frame (33); and front-row sand ploughs (1) are mounted on the front part of the vehicle body A front bogie (2) and the lower part of the vehicle body A driver cab (34). Compared with the prior art, the rail ballast bed sandremoval vehicle has the beneficial effects that through the front-row sand ploughs and rear-row sand ploughs which are arranged at the two ends of the vehicle correspondingly, when a railway encounters a serious sand disaster and steel rails are buried, normal sand removal operation of the sand removal vehicle can be guaranteed; and by arranging a side suction sand removal device and a main suction working trolley, the sand removal efficiency, quality and effect are improved.

Disclosed is a Mastra peanut butter processing method, including the following steps: grinding Mastra meat, removing silt in the Mastra meat and dehydrating; preparing peanut seeds into fine grains; adding appropriate amount of edible oil in a boiler; after the oil is cooked, sequentially adding Mastra meat, various of auxiliary materials, prepared seasonings and additives; adding appropriate amount of water while stirring; drying through fire until most of the water is evaporated; adding appropriate amount of monosodium glutamate and mixing to be even; cooling naturally and hot filling according to required specifications. The processing method solves the technical difficulty that due to large content of silt, Mastra meat is unsuitable to be processed and eaten. Through special preparing and processing techniques, the processed product is delicious in taste and flavor and rich in nutrition, and can better satisfy the food demand of the consumers.

The invention discloses a municipal sewage desanding device and a desanding method. The device comprises a water collecting unit, a sand removing unit, a water storing and returning unit and a sand collecting unit, wherein the water collecting unit internally comprises the sand removing unit which is alternately connected in a circulating static and dynamic manner; a water inlet is formed in the upper left portion of the water collecting unit. A spiral stirrer is arranged in the sand removing unit; the lower part of the water collecting unit is connected with the water storing and returning unit through a water outlet pipe; the lower part of the sand removing unit is connected with the water storing and returning unit through a water return pipe; the lower portion of the sand removing unitis connected with the sand collecting unit through a sand conveying pipe. A one-way water valve is arranged in the water storing and returning unit; the lower part of the water storing and returningunit is provided with a water outlet, and the right side wall of the san collecting unit is provided with a sand outlet. The device is high in automation degree, a large amount of labor work is reduced and avoided, the labor cost is reduced, the precision is high, the sewage treatment efficiency is improved, and the service lifetime of subsequent water treatment equipment is prolonged.

The invention discloses a red mud desanding method and a red mud desanding system in alumina production, and in particular relates to the red mud desanding method and the red mud desanding system in the technology for producing the alumina by filtering red mud through a revolving drum red mud filter. The red mud desanding system in the technology for producing the alumina consists of a hydraulic cyclone, a vibration sieve, a sand washing tank, a sand pump, a collecting tank, a submerged pump and corresponding pipeline valves. The red mud desanding system has good desanding effect, stable operation and wide application range, and can be applied to building new factories and effectively applied to reforming old factories.

The invention discloses a sediment removal device used for a sleeve of an underground water-sealed stone cave storage cavern, and relates to the technical field of underground water-sealed stone cavestorage caverns. The sediment removal device comprises a fixed pipe string arranged in the sleeve, a suction assembly and a jet spray nozzle. The upper end of the fixed pipe string communicates with the ground. The suction assembly is connected with the lower portion of the fixed pipe string and comprises a suction pump and a motor. The suction pump can suck clear water and sediment. A liquid inlet of the suction pump communicates with the inner portion of the sleeve. A liquid outlet of the suction pump communicates with the inner portion of the fixed pipe string. A rotation shaft of the suction pump is connected with an output shaft of the motor. The jet spray nozzle is arranged below the suction assembly. A liquid inlet of the jet spray nozzle communicates with the liquid outlet of the suction pump through a jet pipe. Part of underground water sucked by the suction pump is sprayed towards the sediment depositing in the sleeve through the jet spray nozzle so that the sediment in the sleeve can be crushed, the crushed sediment is sucked through the suction pump together with the underground water and flows back through the fixed pipe string. The sediment removal device is good in sediment removal effect, high in sediment removal efficiency and low in manual workload.

A processing method for rolled Mactra veneriformis meat comprises the following steps: crushing fresh Mactra veneriformis meat, cleaning out sand with water and then dehydrating; cutting and mixing the clam meat and animal meat into meat mash, then adding auxiliary materials, seasoning matters and additives, blending the mixing materials evenly to prepare the stuffing of the rolled meat; and making the rolled meat seasoned and tasty through curing, and finally obtaining the rolled meat and obtaining a finished product after processing and packaging according to different demands. The method solves the technical difficult problem that the Mactra veneriformis meat is inconveniently processed, utilized and edible because of great sand content. With the unique seasoning and processing technology, the product which is tasty and nutritive can better meet the catering demand of a plurality of consumers.

The invention provides a silt settling device. The device is internally equipped with a spiral drainage mechanism, which is beneficial to separation of sand grains and water and can achieve a good desanding effect; a settled sand detection mechanism is arranged to control the operation of a settled sand treatment mechanism, and has high work efficiency; the settled sand treatment mechanism is setto make settled sand treatment convenient and rapid, and improves the work efficiency; the setting of a collapsible protective layer can prevent settled sand from entering a screw rod and affecting the operation of the settled sand treatment mechanism. The silt settling device provided by the invention has the advantages of simple structure and convenient operation.