54results about How to "Easy to discharge mud" patented technology

The invention discloses a sewage biochemical treatment integrated device, system and process method. The sewage biochemical treatment integrated device comprises a pond body (17), wherein an incline guide baffle plate (6) is arranged in the pond body (17), one side of the incline guide baffle plate (6) is provided with an aeration assembly (12) and a vertical gas stripping and reflowing assembly (4), an outer reflowing sludge discharging bucket / trough (13) is arranged between the aeration assembly (12) and the incline guide baffle plate (6), the other side of the incline guide baffle plate (6) is provided with a settling assembly (10) and an incline guide plate / tube (9) parallel with the incline guide baffle plate (6), a chemical spraying perforated pipe (8) is arranged above a water feeding hole of the incline guide plate / tube (9), a settled sludge discharging bucket / trough (14) is arranged below the settling assembly (10), and a movable shielding plate (16) is arranged above the settling assembly (10). The sewage biochemical treatment integrated device has the advantages of small occupation area, low energy consumption, engineering investment reduction, low operation cost and easiness in operation and management because of the combination of gas stripping and reflowing circulating denitrification and suspension cleared sediment dephosphorization.

The invention provides reinforced biological stuffing and a preparation method thereof. The reinforced biological stuffing comprises porosity base material, short-cut active carbon fibers, active carbon granules, and biological materials, wherein the short-cut active carbon fibers and the active carbon granules are stuck on the porosity base material, and biological materials are used for treatment of waste water. According to the reinforced biological stuffing prepared with the method, powder stuck on the reinforced biological stuffing can not fall off easily, water-impact resistance is good, a contact angle is small, biocompatibility is strong, the specific surface area is high, functions of microflora and nutrition slow releasing are achieved at the same time, and mud discharge is convenient.

The invention discloses a screw extrusion type sludge dewatering machine, comprising a machine base (1), a water inlet part, a sludge exit part (41), a water outlet part, a screw shaft (2) with a spiral blade (21), as well as a filter disc assembly composed of a plurality of annular static filter discs (5) and annular dynamic filter discs (6) in a cross-interval arrangement; wherein, each static filter disc (5) is fixed relatively to the machine base (1); the internal diameter of each dynamic filter disc (6) coincides with the external diameter of the blade (21) and has line contact with the blade (21); moreover, the space between two adjacent static filter discs (5) is slightly greater than the thickness of the dynamic filter disc (6) between the two adjacent static filter discs (5) so as to form a gap (7) between the static filter discs (5) and the dynamic filter disc (5); water can flow through the gap (7). Compared with the prior art, the invention enables water to directly flow out through the gaps of the filter disc assembly so as to avoid the abrasion to the static filter discs and the dynamic filter discs caused by sludge; the device has a longer service lifer and adopts only one power source to realize solid-liquid separation, so that the energy consumption is lower; besides, the components of the device are easy to install and simple in structure to facilitate actual implementation.

Provided is an inclined plate sedimentation tank. The inclined plate sedimentation tank comprises a sedimentation tank body and a plurality of inclined plates arranged to be parallel to each other at intervals in the sedimentation tank body. A fixing table is arranged in the inner sides of the sedimentation tank body. A frame is arranged on the fixing table. Two ends of each of the inclined plates are respectively hinged with two sides of the frame along the width direction. The top of each inclined plate is connected with a pulling rod. The extension direction of the pulling rod is the arrangement direction of the inclined plates. Vibration devices are arranged on the frame. The inclined plate sedimentation tank can avoid obstruction of the inclined plates when the sedimentation efficiency is raised.

The invention discloses a drop-aeration self-driven biological rotating disc which comprises a shallow tank and a biological rotating disc, wherein the biological rotating disc is rotatably erected on the shallow tank; the shallow tank comprises a tank body and a waterproof baffle arranged at the upper part of the tank body; a water outlet weir is arranged on the right side of the tank body; a water outlet guidance baffle is arranged below the water outlet weir; a mud pipe is arranged at the bottom of the shallow tank; and the circumference of the biological rotating disc is divided into a plurality of water collection tanks at equal intervals by multiple separating trough plates. The biological rotating disc disclosed by the invention can be used for effectively solving a problem of poor drop-aeration effect, and realizing self-driven automatic aeration by virtue of improvement; a conventional operation mode of the biological rotating disc is changed; and the biological rotating disc not only can save energy but also can achieve a good aeration effect.

The invention provides an inclined tube floating device for waste water treatment, belonging to the technical field of environmental protection, which is characterized in that: a water inlet is communicated with a whirl mixer arranged at the front end of the device; a mud bucket is arranged on the bottom end of the device body; the device is internally provided with a perforated dredge pipe above which is mounted with a depression area; the depression area is internally provided with an inclined plate and communicated with an absorption area which is arranged at the back end of a buffer area, the absorption area is internally provided with a releasing device of air flotation microbubbles, namely, an activated ploy-oxygen aerator; a mud collecting tank is also mounted on the top end of the absorption area; a catchment area is mounted on the top end of the buffer area, and water collecting equipment is mounted in the catchment area; the upper part of a reaction area is provided with an electric scraping vehicle for removing scum generated by air flotation, and the tail part thereof is provided with an effluent tank which is internally provided with a liquid level regulator; the bottom of the liquid level regulator is provided with a drain pipe. The invention has the beneficial effects of improving treatment effect, evenly mixing medicament and waste water, saving occupied area and materials consumption, increasing air flotation effect, lowering dramatically moisture content of the scum, eliminating dead zones in sludge discharging of devices, optimizing the effluent water quality and reducing moisture content of the sludge.

The invention provides a gravel bed structure and an in-situ purification system of riverway water formed thereby. The gravel bed structure and the in-situ purification system of riverway water formed thereby have following beneficial effects: firstly, the gravel bed structure is disposed on a river bottom without occupying additional soil area and changing external appearance of an embankment; secondly, the overall system is flexible and changeable in such a manner that the overflow amount and processing amount of a river can be controlled by a flap regulating dam so that in flood seasons, the flap regulating dam can be completely opened for allowing river water to surmount and reponses are made based on variation in flow amount of riverway water; thirdly, back flushing operation can be realized by closing a water intake gate and completely opening the flap dam while by fully utilizing the terrain slope in association with a sludge pump, fine sludge discharge and back flushing effects are obtained; finally, productization equipment are adopted by the flap dam and the water inlet gate so that the whole set of system is easy to automatically control and helps to save manual cost during operation and is convenient to manage and maintain.

The invention provides an integral membrane coagulation reactor (MCR) and a water treatment technology. The integral MCR comprises a membrane pool, and a membrane component and an aerating apparatus which are arranged in the same membrane pool. A coagulant is injected into the membrane pool while aeration is carried out at the bottom of the membrane pool, and the aeration rate is more than or equal to 0.05L / min, so that the coagulant is evenly dissolved in the membrane pool, and the particle sizes of flocs are enabled to stably increase. The contaminants are effectively removed by the coagulant, so that the transmembrane pressure difference increment caused by the contaminants is slowed down. The water quality of effluent is guaranteed by utilizing the interception performance of an ultrafiltration membrane. Furthermore, the surface of the membrane is not damaged by the flocs in a running process. The flocs are continuously formed in the membrane pool, so that the flocs are large in density, sludge is conveniently discharged, and less sludge is left. The integral MCR and the water treatment technology can reduce the occupied area to a great extent while guaranteeing contaminant removal efficiency and retarding membrane fouling. The integral MCR and the water treatment technology can be used for treating drinking water of a contaminated water source, and are also applied to urban sewage plant treatment and reclaimed water purification.

The invention relates to a novel horizontal tube type sedimentation pond. The novel horizontal tube type sedimentation pond comprises an upper precipitation separation device and a lower precipitation sludge discharging device, wherein the precipitation separation device comprises horizontal tube units and sludge chutes; each horizontal tube unit comprises an inclined plate, and a plurality of separating plates which are arranged at intervals on the lower side surface of each inclined plate; each separating plate is a V-shaped plate consisting of a surface A and a surface B, and an opening of the section of each V-shaped plate is toward the corresponding inclined plate; each surface A is arranged on the side surface of the corresponding inclined plate; all surfaces A are parallel to each other; the planes of the surfaces B are parallel to or intersected with the plane of the corresponding inclined plates; all surfaces B are parallel to each other; a sludge discharging opening is left between every two adjacent separating plates on the same inclined plate. The novel horizontal tube type sedimentation pond has the advantages that the horizontal tube units comprise the inclined plates and the separating plates, so that the convenience of processing, manufacturing and mounting is ensured; channels being narrow in upper part and wide in lower part can be formed by the sludge chutes between adjacent horizontal tube units, so that the distribution condition that more sludge is at the lower part of each sludge chute and less sludge is at the upper part of each sludge chute apply is adapted, and as a result, the high efficiency of the precipitation separation device can be ensured.

The invention discloses a comprehensive environmentally-friendly multifunctional sewage treatment system. A water volume and water quality adjusting pool D can conduct primary filtering conveniently on sludge and large impurity particles, is good in filtering treatment effect, and can conduct circulating filtering treatment on sewage. A hydrolytic acidification reacting pool E can improve the mixed contact effect of microorganisms and wastewater, and the reaction effect can be stabilized; sludge discharging and feeding can be conducted conveniently; wastewater can be input quantitatively. A waste gas treatment device B can clear off hydrogen sulfide, carbon monoxide and methane without manual feeding. A / O biochemistry pool G is arranged, so that the area occupied by a device is reduced, and the sludge is convenient to recycle and utilize. An aerating device C can realize single driving and multiple purposes, reduce energy losses, and conduct sufficient aeration on sewage. A chlorine dioxide generator A can liquefy, conveniently store and transport chlorine dioxide, operation and control are convenient, and manufacturing costs are low.

A low-pressure membrane water treatment process based on a sandwich type loose floc protective layer is disclosed. An integrated type membrane coagulation reactor is adopted by the process, and mainly includes a membrane tank, a low-pressure membrane assembly arranged in the membrane tank and an aeration device arranged in the same membrane tank. The membrane tank is in series connection with a suction pump and a coagulant adding tank through a pipeline. The bottom of the membrane tank is provided with a sludge discharging valve. The coagulant is injected into the membrane tank through the coagulant adding tank through a batch-type manner so that coagulant hydrolyzed floc forms the sandwich type loose protective layer on the membrane surface. Raw water is fed into the membrane tank, treated by adsorption by the floc layer and membrane treatment, and then discharged. The process can ensure water quality of discharged water, and can effectively reduce membrane pollution at the same time, especially membrane pollution caused by low-molecular-weight organic matters. The treatment device integrating an adsorption process and a membrane process is adopted by the water treatment process, thus effectively reducing the occupied space.

The invention provides an industrial feed water treatment system which comprises a raw water adjusting tank, a mixer, a flocculoreaction tank, a settling pond, a sludge tank, a V-shaped filter and a clean water pond, wherein raw water fed outside a plant is fed into the raw water adjusting tank, lifted to the mixer through the raw water adjusting tank, sufficiently mixed with a coagulant fed by coagulant feeding equipment inside the mixer and subsequently fed into the flocculoreaction tank; a coagulant aid is fed into the flocculoreaction tank; the coagulant and the coagulant aid react with suspended solids in water in the flocculoreaction tank, and then alumen ustum which is compact and easy to deposit can be rapidly formed; effluent of the flocculoreaction tank is fed into the settling pond, then the suspended solids in the water can be deposited; the deposited sludge is fed to the sludge treatment system; effluent of the settling pond is fed into the V-shaped filter to remove the solids in the water; the V-shaped filter is filled with quartz sand and fine gravel; filtered water is fed into the cleaning water pond and is pumped to a production device. By adopting the industrial water feeding treatment system, the flocculation effect as well as the quality of the effluent is improved.

This working vehicle is provided with: a traveling wheel 4 for supporting a traveling machine body; and a cage wheel 100 removably mounted to the traveling wheel 4. The cage wheel 100 is provided withan annular rim 102 and a plurality of cage wheel lugs 105 provided to the rim 102 at appropriate intervals in the circumferential direction of the rim 102. The cage wheel lugs 105 are tilted in sideview such that the outer peripheral end 105a side is located further on the upstream side in the rotational direction during the forward movement of the traveling machine body than the inner peripheral end 105c side. The outer peripheral ends 105a of the cage wheel lugs 105 are bent toward the center of rotation of the rim 102.

The invention is concerned with a kind of machine to scrape mud on the bottom of sediment pool. It relates to drive equipment, initiative chain wheel, idler pulley, chain and scraping plate. The initiative chain wheel relates to wheel body and some U type blocks. The U type blocks set on the same circle of wheel body equably and connect with wheel body respectively. U type block arranges with each other and the closer two sides of near two blocks make into a wheel tooth. It adopts chain wheel with assembled wheel tooth to increase one time of work time. The transmission shaft under the water lightens the workload, service time and cost. The main accessory of this machine is nonmetal stuff with high anti-causticity to reduce the investment and power load, and to enhance the efficiency of whole machine. The whole machine has light deadweight, anti-causticity, long work time, low power consume. The effect of excluding mud and residue is good to keep the quality of drainage.

A multiphase flow assembly type closed coagulation settling device comprises a tank, a water inlet segment A, a flocculation mixed reaction segment B, a coalescence separation segment C, a coalescence separation segment C, a steady flow segment E and a water outlet segment F, wherein the tank is designed in a closed manner, and the water inlet segment A, the flocculation mixed reaction segment B, the coalescence separation segment C, the coalescence separation segment D, the steady flow segment E and the water outlet segment F are arranged in a left-to-right order; the water segment is communicated with the flocculation mixed reaction segment through a water inlet chamber, and grid flocculation is added in a flocculation cylinder, so medicine mixing and reacting effects are improved through utilizing the grid flocculation reaction; and sewage treated by the flocculation mixed reaction segment sequentially goes through the above two coalescence separation segments, oil comes up, mud sinks, and the treated sewage goes through the steady flow segment, enters the water outlet segment and is discharged by a water outlet tube. The device has the advantages of no oxygen exposure points because of tight pressure in the whole course, good separation effect because of the high treatment efficiency, corrosion resistant filler, stable separation effect, adjustable inclined plate interval, convenient dismounting and recondition because of the assembly type structure, occupied land saving because of the high integrated level, convenient operation because of the high automation degree, and convenient construction and short period because of the prefabricated whole skid.

The invention relates to a multi-phase flow assembly type sealing coalescence oil removing apparatus, which is applicable for treatments of conventional oilfield wastewater and wastewater with low polymer concentration, and comprises a tank, a water distribution chamber, coalescence sections, a separation section, a rectification section, a water collection chamber, a mud washing system, a mud discharging system, an oil collection system and the like. Wastewater enters a water distribution section inside the tank from a water inlet pipe of the multi-phase flow assembly type sealing coalescence oil removing apparatus, and then sequentially enters the first stage coalescence section, the second stage coalescence section and the third stage coalescence section, wherein each coalescing section is filled with a coalescence filler. Effluent from the coalescence section enters the separation section, wherein the separation section is filled with oblique plates having adjustable intervals. Effluent from the separation section enters the rectification section, and then enters the water collection section, wherein the rectification section and the water collection section are separated through a baffle, and the water collection section is provided with a water outlet pipe. One end of the water outlet pipe is provided with a water collection bell mouth, wherein the water is discharged out of the multi-phase flow assembly type sealing coalescence oil removing apparatus from a water outlet through the water collection bell mouth. The apparatus has the following advantages that: oil removing efficiency is high, effluent quality is good, occupation area is small, structure design is compact, automatic control is easily achieved, inner components adopt assembly type structures, and disassembly and maintenance are easy.

The invention discloses an integrated sewage purifying apparatus with a detection system. The apparatus comprises a shell, a water inlet center cylinder, a circulation device and an aeration device, the shell is a cylindrical structure, the bottom of the shell is welded with a mud bucket, the mud bucket is a conical body, the bottom of the mud bucket is provided with a mud collecting pit, and a mud discharging tube is arranged under the mud collecting pit; the side surface of the upper part of the shell is provided with a water inlet tube and a water outlet tube; a channel steel frame is arranged in the shell, the channel steel frame is a groined channel steel welding frame, and the outer side of the channel steel frame is welded to the inner wall of the shell; and a water inlet center cylinder is vertically arranged in the channel steel frame, the water inlet center cylinder is fixedly connected with the channel steel frame, the water inlet center cylinder communicates with the water inlet tube, a rotating shaft is coaxially arranged at the center of the water inlet center cylinder, and the upper part of the rotating shaft is connected with a gear motor shaft. The apparatus has the advantages of small occupied area, small height, low investment cost, thoroughness in mud discharge, no mud dead angle, simplicity and convenience in running and maintaining, and high wastewater inlet impact load resistance.

The invention discloses high-density suspended filler and a preparation method thereof, and belongs to the field of filler for water treatment. The filler is formed by adhering a surface consisting of hollow fibers of vinyl resin to the surface of honeycomb particle filler of the vinyl resin, and is provided with a layer of tidily arranged hollow fibers. The method comprises the following steps: uniformly mixing a vinyl resin particle raw material, nanometer inorganic filter and an antioxidant; feeding into a screw extruder to perform mixed extrusion; then shaping with a mold; adhering the hollow fibers to the surface of honeycomb particle filler of the vinyl resin through flocking of electrostatic flocking equipment to form the filler with a layer of tidily arranged hollow fibers on the surface, namely the high-density suspended filler. The filler can take long service life and good sewage treatment capacity of the biological filler into consideration, is low in comprehensive economic cost, has extremely high specific surface area and is easy in sludge discharge.

The invention discloses an automotive painting electrophoresis waste water preprocessing system and method. The system comprises a material feeding unit, reaction units, a filtering unit and a pH (Potential of Hydrogen) regulation unit communicated in sequence, wherein the material feeding unit is full of waste water containing electrophoresis liquid; the reaction unit comprises an electrophoresisreaction tank and a precipitation tank communicated in sequence; the precipitation tank comprises a liquid discharge hole and a sludge discharge hole; the liquid discharge hole is communicated with the filtering unit; the sludge discharge hole is provided with a sludge processing device; two reaction units are respectively a first-level reaction unit and a second-level reaction unit connected inseries; the precipitation tank in the first-level reaction unit is a vertical flow precipitation tank, and a precipitation tank in the second-level reaction unit is a sloping plate precipitation tank.The method is characterized in that a secondary coagulating precipitation technology is adopted for processing, the vertical flow precipitation tank is adopted in first-level precipitation separation, the sloping plate precipitation tank is adopted in second-level precipitation processing, and a coagulation process is accurately controlled. The system is convenient in operation, is stable in operation and has a simple technical process, and drainage COD (Chemical Oxygen Demand) concentration can be lowered to be 1000mg / L.

The invention discloses a sewage treatment device convenient for purifying domestic wastewater, which comprises a treatment box, a connecting cylinder is arranged on the top surface of the treatment box in a penetrating manner, the connecting cylinder is fixedly connected and communicated with the treatment box, a rotating cylinder is arranged in the treatment box, a fixing ring is fixedly arranged at the top end of the rotating cylinder, and the fixing ring is rotatably connected with the connecting cylinder through a bearing; the bottom end of the rotating cylinder is fixedly provided with a conical cylinder in a communicating mode, the bottom end of the conical cylinder is fixedly provided with a fixed cylinder in a communicating mode, the bottom end of the fixed cylinder penetrates through the bottom face of the treatment box and is fixedly connected with the treatment box, the bottom face of the fixed cylinder is sealed, and a spiral shaft penetrates through the bottom face of the fixed cylinder and is rotationally connected with the fixed cylinder. The top end of the spiral shaft extends into the conical barrel, a plurality of spiral blades are evenly and fixedly arranged on the spiral shaft, and a linkage assembly is arranged between the spiral shaft and the treatment box. The sewage treatment device is simple to operate, convenient for uniform stirring operation and high in sewage separation efficiency.

The invention discloses an automatic solid impurity separation device for wastewater pretreatment. The device comprises a solid impurity cleaning mechanism, the solid impurity cleaning mechanism comprises a reservoir, a filter main body, a guide main body and a power main body, the filter main body and the reservoir are rotatably mounted together, the guide main body and the reservoir are fixedly connected together, the reservoir comprises a tank body, a separation plate and a pair of supporting legs, the separation plate is fixedly connected with the tank body, the supporting legs are fixedly connected with the tank body, the filtering main body comprises rotating seats, a filtering net, a gear ring, a first rotating shaft and a belt pulley, the first rotating shaft is rotatably connected with the tank body, a pair of rotating seats is arranged, the rotating seats are fixedly connected to the outer end of the first rotating shaft, and the filtering net isfixedly installed at the outer ends of the rotating seats. Part of silt can be automatically discharged, and the use requirement can be better met.

The invention provides an adjustable baffling lamella settler in order to solve the problems that a lamella settler is single in form, and precipitating efficiency needs to be further improved. The adjustable baffling lamella settler comprises a shell 1, a water inlet channel 2, a settling area 3,baffling lamellas 4, a clear water region 5, a water outlet trough 6, a mud hopper 7, a mud discharge pipe 8, a control rope 9, a pipeline 10, a pulley 11, a hinge wheel 12 and a handle 13. Each baffling lamella 4 comprises an upper section 41, a middle section 42 and a lower section 43. The upper ends of all the baffling lamellas 4 are hinged to an upper hinge rod 44, and the lower ends of all the baffling lamellas 4 are hinged to a lower hinge rod 45. The upper section 41, the middle section 42 and the lower section 43 of each baffling lamella 4 are of an integrated structure. Different from a traditional lamella, the baffling lamellas are formed by connecting a series of lamellas with specific included angles in series, and the settling efficiency is higher than that of a traditional lamella settler. The lamellas can be placed at vertical positions through the control rope, and lamella mud discharging is convenient.

The invention discloses a treatment method for comprehensive sewage of smelting. The method comprises the following steps: introducing the comprehensive sewage of smelting into a wastewater regulatingtank to regulate a pH value of the sewage; then lifting the comprehensive sewage to a reduction reaction tank, adding a reducing agent, and carrying out a reduction reaction; after the reaction, introducing the comprehensive sewage into a coagulation reaction tank, adjusting the pH value of the comprehensive sewage to 7, then adding a heavy metal remover, and carrying out treatment; introducing the treated sewage into an inclined-tube sedimentation tank for flocculating settling, enabling the obtained supernatant to enter a clean water tank, and treating the obtained sludge for refining of heavy metals or other treatment; introducing the obtained supernatant into an LEC electro-catalytic oxidation device for degradation of organic pollutants, and discharging the sewage after the sewage reaches the standard. When the method is used for treating the comprehensive sewage, high efficiency and low cost are achieved, environmental protection is facilitated, and certain social benefits and economic benefits are achieved.

The invention discloses a technology for treating fracturing flow-back fluid of an oil and gas field through multi-metal catalytic oxidation, and is characterized in that the technology comprises thefollowing steps: an oxidation process: firstly, catalytic oxidation treatment is carried out on multiple metals in a fracturing fluid pretreatment workshop; a filtering process: a series of filteringsteps are carried out through air floatation, coagulation pretreatment, MBR passing and activated carbon adsorption DQS modular combined equipment; and an adsorption process, wherein precipitation separation is facilitated through the principle of the step S2, and the adsorption effect is achieved. After all the steps are completed, Fenton oxidation, flocculation, SBR and combined treatment are carried out on fracturing wastewater. According to the biological method, organic substances and toxic substances in the wastewater are degraded through the metabolic action of microorganisms; comparedwith other wastewater treatment methods, the biological method has the greatest advantage of no secondary pollution, and the fracturing flow-back fluid has high COD, so that oxidation, flocculation, filtration and other methods are generally needed for pretreatment before the biological method is used for treatment, and the biodegradability of the wastewater is improved.

The invention discloses a sewage biochemical treatment integrated device, system and process method. The sewage biochemical treatment integrated device comprises a pond body (17), wherein an incline guide baffle plate (6) is arranged in the pond body (17), one side of the incline guide baffle plate (6) is provided with an aeration assembly (12) and a vertical gas stripping and reflowing assembly (4), an outer reflowing sludge discharging bucket / trough (13) is arranged between the aeration assembly (12) and the incline guide baffle plate (6), the other side of the incline guide baffle plate (6) is provided with a settling assembly (10) and an incline guide plate / tube (9) parallel with the incline guide baffle plate (6), a chemical spraying perforated pipe (8) is arranged above a water feeding hole of the incline guide plate / tube (9), a settled sludge discharging bucket / trough (14) is arranged below the settling assembly (10), and a movable shielding plate (16) is arranged above the settling assembly (10). The sewage biochemical treatment integrated device has the advantages of small occupation area, low energy consumption, engineering investment reduction, low operation cost and easiness in operation and management because of the combination of gas stripping and reflowing circulating denitrification and suspension cleared sediment dephosphorization.

The invention discloses a swirl type high-efficiency sedimentation device, which belongs to the technical field of drinking water purification. A cyclone-type high-efficiency sedimentation device, comprising a cyclone-type precipitator, the interior of the cyclone-type precipitator is provided with a cyclone device, the outlet of the cyclone-type precipitator is provided with a flow measuring device, and the flow measurement A control device is installed on the outside of the device, and a water pump is connected to the end of the flow measuring device. The invention effectively solves the problems of many mud discharge valves in the traditional sedimentation process, which are easy to be blocked, and the management and maintenance workload is large.

The invention discloses a biological treatment device for oily sewage in an oil field. The biological treatment device comprises a biological pool body. The whole biological pool body is divided intoa plurality of rectangular zones by the treatment device, wherein each zone is provided with a movable filler frame, wherein the shape and the size of the top surface of each movable filler frame arethe same as the shape and the size of the top surface of the corresponding zone, and the height of each movable filler frame is slightly lower than a normal working liquid level of a biological pool;each movable filler frame is in the shape of a cubic frame, the lower parts of four side surfaces of each movable filler frame are provided with filler fence cross rods which are uniformly arranged atintervals in a horizontal direction; a plurality of vertical equal-height support legs are arranged on the bottom surfaces of the movable filler frames; and an independent aeration system and an independent sludge discharge pipeline are integrated onto the bottom of each movable filler frame. According to the invention, a filler frame provided by the invention is high in integration degree, and all equipment required by a biological system is integrated in one skid-mounted frame; the biological treatment device is special for an oilfield produced water treatment process, can be used independently or used in a combined manner, and is good in flexibility; and the frame is provided with side protective fences, so even if the filler falls off, the filler cannot fall into the pool, and thus, difficulty in desilting maintenance is reduced.

The present invention provides a work vehicle. The work vehicle includes a traveling wheel (4) for supporting the traveling body, and a sag prevention wheel (100) detachably attached to the traveling wheel (4). A sag-preventing wheel (100) includes an annular rim portion (102) and a plurality of sag-preventing wheel lugs (105) provided on the rim portion (102) at appropriate intervals along the circumferential direction of the rim portion (102). When viewed from the side, the sag prevention wheel lug (105) is inclined so that its outer peripheral end (105a) side is positioned upstream in the rotational direction when the traveling body moves forward rather than its inner peripheral end (105c). The outer peripheral side end part (105a) of the sag prevention wheel lug (105) is bent toward the rotation center side of the rim part (102).