WO2008071033A1 - Bassin de décantation en continu avec rotation équilibrée sous châssis - Google Patents

Bassin de décantation en continu avec rotation équilibrée sous châssis Download PDF

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Publication number
WO2008071033A1
WO2008071033A1 PCT/CN2006/003377 CN2006003377W WO2008071033A1 WO 2008071033 A1 WO2008071033 A1 WO 2008071033A1 CN 2006003377 W CN2006003377 W CN 2006003377W WO 2008071033 A1 WO2008071033 A1 WO 2008071033A1
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WO
WIPO (PCT)
Prior art keywords
chassis
settling tank
mud
continuous
tank
Prior art date
Application number
PCT/CN2006/003377
Other languages
English (en)
Chinese (zh)
Inventor
Fenchao Wu
Original Assignee
Fenchao Wu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fenchao Wu filed Critical Fenchao Wu
Priority to PCT/CN2006/003377 priority Critical patent/WO2008071033A1/fr
Priority to CN2006800565316A priority patent/CN101547726B/zh
Publication of WO2008071033A1 publication Critical patent/WO2008071033A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
    • B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • B01D21/20—Driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/32—Density control of clear liquid or sediment, e.g. optical control ; Control of physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters

Definitions

  • the present invention relates to a continuous settling separation device for a gravity separation process, and more particularly to a continuous settling tank for a balanced rotating chassis provided with a movable chassis. Background technique
  • the sedimentation tank is used as a gravity separation device for separating solid suspended matter in the suspension.
  • the working principle is based on the instability of the suspension.
  • the solid particulate matter suspended in the liquid slowly descends under the action of the gravitational field. Settling to achieve separation of solid and liquid phases.
  • the settling velocity of solid particles is related to particle size, liquid viscosity, specific gravity, and the size of the settled section. For a given material medium, during the continuous settling operation, the settling velocity is only related to the settling section of the equipment.
  • the absolute settling velocity of the solid particles should be greater than the rising velocity of the liquid through the settling section. It can be seen that for gravity sedimentation equipment, increasing the settlement section of the equipment is the only effective way to improve the separation efficiency and processing capacity of the equipment.
  • the characteristics of continuous sedimentation are the continuity and stability of the separation operation, which can adapt to the objective requirements of modern industrial production, and are widely used in municipal, environmental protection, antimony, metallurgy, power generation, chemical and other fields.
  • Municipal engineering is mainly used for purification and treatment of urban water supply and drainage; environmental protection field for urban sewage and industrial wastewater purification; mining areas such as metal ore water selection, coal mine water use clarification cycle; metallurgy, power generation for water quality Purification;
  • the chemical industry is widely used in the purification of process water, the production of inorganic chemical products, the purification of brine before the product evaporation method, the precipitation separation after chemical precipitation, the purification and purification of the brine before the electrolysis of the chlor-alkali industry, etc.
  • the above processes all involve continuous sedimentation separation techniques.
  • Continuous settling tanks can be divided into advection, vertical flow and radial flow according to liquid flow direction.
  • the large-scale metal structure continuous settling tank mainly adopts the radial flow mode.
  • the characteristics of the radial flow type are: the liquid flows horizontally in the tank, the dispersion efficiency is high, and the coagulation effect is good; the continuous settling tank is collected according to the sedimentation mud.
  • the methods can be roughly classified into two types: mechanical methods and gravity methods.
  • the so-called mechanical method means that the collection process of the sedimentation mud is performed by a dedicated mechanical device.
  • the application of mechanical method is more common.
  • the settling tank with a diameter larger than 20m should adopt the method of mechanical scraping.
  • the method of collecting gravity by gravity method is to set up several cones at the bottom of the settling tank.
  • the slope of the bucket slides down and gathers into the cones.
  • the discharge of the sediment sludge mainly depends on the static pressure of the liquid column and the suction stroke of the mud pump.
  • Gravity method does not set mechanical scraping Mud installation, there is no problem in large-scale equipment, but in order to ensure the normal operation of the equipment, the discharge of sedimentation mud needs to be carried by a large amount of liquid, and the liquid content reaches 95-98% of the total discharge volume, and the sedimentation volume of the sedimentation mud only It accounts for 2-5%, resulting in a large amount of waste of materials, poor separation efficiency, high operating cost of equipment, and a large amount of sewage pollution to the environment can not be ignored, so the secondary separation of sewage should be treated.
  • the main problems in the continuous settling tank in the prior art are: the technical means of mud discharging is backward, the principle is simple, the scientific and technological content is not high; the structure of the equipment is wrong, the effective settlement cross-sectional area is small, the separation efficiency is low; the processing capacity and operation of the equipment
  • the stability, operation and control level cannot keep pace with the development of modern industry; equipment investment and operating costs are high, especially the cost of civil engineering projects accounts for a large proportion of total equipment investment; more importantly, the existing technology cannot be effective and reasonable.
  • To solve the problem of large-scale equipment because of the small processing capacity, many large enterprises can only increase the number of equipment to meet production needs.
  • the technical problem to be solved by the present invention is to solve the above-mentioned deficiencies of the prior art, and to provide a gravity separation device-balanced rotating tray continuous settling tank.
  • the balanced rotary tray continuous settling tank can fundamentally solve the technical problem of restricting the large-scale and intelligent gravity separation device.
  • the gravity separation device-balanced rotating chassis has a settling tank, and the settling tank is a continuous settling tank provided with a movable chassis and a chassis balancing device in the tank body.
  • the movable chassis is a disc which is disposed inside the settling tank and can be rotated around the axis and axially moved.
  • the structure is a combined structure with a certain rigidity independent of the groove body, and a plurality of cavities with a certain total volume are provided in the disc body ( The size of each cavity is not necessarily equal, but the total volume of the cavity is defined) and the disk surface is planar.
  • the chassis is disposed at the bottom of the settling tank and covers the entire settlement section, and divides the settling tank into upper and lower chambers.
  • the chassis Under working condition, the chassis is suspended at the bottom of the settling tank and is in a stable equilibrium state. Under the external force, the chassis can rotate around the axis and axially move.
  • the mechanical collector consists of a drive mechanism, a rotating arm and a scraping pad coupled to the rotating arm for collecting sediment.
  • the mechanical collectors are horizontally distributed at different locations of the settlement section and above the plane of the chassis and are rotatable about their respective centers of rotation. The scraping gap of the scraping disc can be adjusted by the axial translation of the chassis.
  • the present invention also includes a dynamic seal device and a gas phase balance chamber for maintaining the suspension balance of the chassis, wherein the dynamic seal device is used to close the cavity in the lower chamber of the chassis.
  • the gas phase balance chamber is used to maintain a stable balance of the chassis.
  • the dynamic sealing device is disposed between the bottom plate and the annular gap formed by the sinker groove body to close the cavity of the lower portion of the chassis.
  • the dynamic sealing device is composed of two kinds of sealing pairs: a rotary seal and a flat dynamic seal, which solves the sealing problem in the three-dimensional motion state in which the chassis rotates around the fixed axis and is axially moved.
  • the rotary seal is composed of a static ring group integrally connected with the groove body and a movable ring group welded integrally with the chassis;
  • the translational seal is composed of a cavity side wall of the static ring group and a pair of sliding sealing rings which can be synchronously translated up and down Composition.
  • the dynamic seal draws a hydraulic seal.
  • the chassis is rotatable by a rotary power system including a motion actuator, a rotating shaft, and a sliding coupling coupled thereto.
  • the shaft is a hollow rigid shaft located at the center of the tank and its bottom is rigidly connected to the chassis.
  • a shaft centering device is further disposed on the bottom plate of the settling tank for fixing the rotation center of the chassis.
  • the gas phase equilibrium chamber is placed in the rotating shaft, and the gas phase equilibrium chamber is a hollow semi-closed gas phase space, the upper end of which is closed, and the lower end is connected with the lower chamber of the settling tank, and the adjustment of the stable balance state of the chassis is self-regulating.
  • the material to be treated enters the settling tank through the material dispersion system, and the material dispersion system is arranged above the plane of the chassis, and is composed of a plurality of feed pipes distributed horizontally and a plurality of distributors connected thereto.
  • the liquid working medium is first injected into the lower chamber of the chassis until it overflows from the plane of the chassis. At this time, the gas in the gas phase equilibrium chamber is closed by the liquid working medium; then, the liquid sealing is injected into the dynamic sealing device.
  • the medium causes the dynamic sealing device to enter a sealed state, so that the lower chamber of the chassis is closed, and the liquid working medium is continuously injected. Based on the incompressibility of the liquid, the chassis starts to rise slowly along the axial direction until it is separated from the bottom plate of the settling tank and suspended.
  • the chassis rotates together with the chassis, and a plurality of mechanical collectors disposed above the chassis rotate around the respective rotation centers to collect the chassis.
  • the sedimentation mud, the relative movement track with the chassis is to form a plurality of annular spiral belts tangential to each other on the plane of the chassis.
  • the relative motion trajectories of the two can extend throughout the settlement section, thereby completing the collection of sedimentation mud. process.
  • Each mechanical collector has separate mud discharge pipes, and the sedimentation mud is collected outside the tank and then transported outward through the mud pump.
  • the technical solution adopted by the present invention merely replaces the rotation of the scraping mud in the prior art sinking tank with the rotating motion of the chassis, and the mechanical motion principle has similarity, and the trajectory analysis of the raft from the sedimentation mud,
  • the prior art means the rotary motion of scraping mud, the function of which is to move the sedimentation mud to the center of rotation, and then to the outside of the tank through the center drain pipe, the sludge discharge efficiency is poor, which restricts the processing capacity of the equipment.
  • the collection of the sedimentation mud of the technical solution of the present invention does not have a process of collecting to the center of rotation, but is directly taken out by the mechanical collector and then led out of the tank, and the sludge discharge efficiency is significantly improved, which means that the mechanical energy consumption of the equipment is remarkable.
  • the prior art mud discharging method requires a certain taper on the bottom surface of the settling tank to facilitate the directional movement of the sedimentation mud, and the smaller the taper, the movement The faster, but the taper setting correspondingly increases the manufacturing cost and manufacturing difficulty of the device, and the settling tank involved in the technical solution of the present invention does not have the above problems.
  • the technical solution of the present invention also fully utilizes the suction stroke of the mud pump and the liquid column static pressure of the material in the tank.
  • the beneficial effects of the technical solution of the present invention are: due to the balanced rotation of the chassis, the continuous discharge of the sedimentation mud has a more economical, reliable and convenient technical means, and the processing capacity and separation efficiency of the device are significantly improved; the balanced rotating chassis
  • the continuous settling tank can improve the stability and operational flexibility of the settlement equipment, so that the operation and control of the equipment can better adapt to the modern industrial intelligent operation control level.
  • the technology of the present invention has advanced economic and technical characteristics for large-scale applications, and is an ideal technical route for the development of the settlement equipment in the direction of large-scale.
  • FIG. 1 is a working principle diagram of a continuous settling tank according to a technical solution of the present invention
  • FIG. 2 is a schematic structural view of a continuous settling tank according to a technical solution of the present invention
  • FIG. 3 is a schematic diagram of a preferred material dispersion and sedimentation sludge discharge principle of a continuous settling tank according to the technical solution of the present invention
  • Figure 4 is an enlarged view of a portion I in Figure 2;
  • Figure 5 is a schematic view showing the working principle of the dynamic sealing device of the continuous settling tank according to the technical scheme of the present invention
  • Figure 6 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 7 is a cross-sectional view taken along line B-B of Figure 6;
  • Figure 8 is a schematic view of the longitudinal structure of the chassis
  • FIG. 9 is a schematic diagram of the flow control of the continuous settling tank according to the technical solution of the present invention.
  • PT - Pressure Transmitter PIC-Pressure Display and Controller, PE-Pressure Detector, PV-Pressure Adjustable, PI-Pressure Display, PG-Field Pressure Display, FIC-Flow Display and Controller, F0-Limit Orifice plate, FQC-flow accumulation controller, FY-flow calculator, FT-flow transmitter, FV-flow regulator, TE-temperature detector, TG - field temperature display, TI-temperature display, MLSS -Sludge concentration, I-chain controller, DR-down shower, HS - transfer switch, H0A-manual/off/automatic converter, ZS-position switch, M-motor, NI-stress display, NE-stress detector , LIT-Level display and sensor, LIC A - level display, control and alarm, LY-level gauge Calculator, LV_Level Control Valve, AY-Analytical Calculator, AE-Analytical Tester, AIC-Analytical Display and Controller, SY-Frequency
  • the continuous settling tank involved in the technical solution of the present invention involves three kinds of media in normal operation, namely: process material Lid t , working medium Lid 2 and sealing medium Lid 3 .
  • the physical properties of the three media may be the same or different, depending on the specific design task.
  • the working medium Lid 2 and the sealing medium Lid 3 are preferably industrial circulating water.
  • the structural feature of the continuous settling tank is: a rotatable chassis 3 is provided at the bottom of the settling tank, and a gas phase balance chamber 5 is provided for stable balance and rotation of the chassis 3.
  • the dynamic sealing device 11 and the motion actuator 18 are provided.
  • the continuous settling tank involved in the technical solution of the present invention has the following structural components and functional units - 1. Settlement section and effective settlement height
  • the unit consists of two parts: the tank body 1 and the bottom plate 4.
  • the diameter of the tank body 1 determines the area of the settlement section of the equipment, which determines the separation capacity of the equipment. Therefore, the tank diameter is the basic design parameter of the sedimentation separation equipment.
  • the design calculation formula for the diameter is:
  • h 4 Chassis height, m, determined according to specific design tasks.
  • the bottom plate 4 of the continuous settling tank involved in the technical solution of the present invention no longer has the structural features of collecting sedimentation mud, and the surface of the bottom plate 4 is a horizontal plane and is welded to the entire position of the tank body 1.
  • the chassis is a core component of the continuous settling tank involved in the technical solution of the present invention, and is disposed at the bottom of the settling tank. Unlike the settling apparatus of the prior art, the sedimentation mud does not fall onto the bottom plate 4 of the settling tank, but falls onto the vertically movable and rotatable chassis 3 above the bottom plate and rotates with the chassis 3.
  • the chassis can adjust its balance position within the axial stroke h 5 by the control system.
  • the chassis 3 When the chassis 3 is completely detached from the bottom plate 4, the chassis can be swung under the action of the motion actuator 18, and the settling tank starts normal. Working;
  • the chassis 3 can also be controlled to fall back onto the floor 4 by the control system.
  • the structural design of the chassis 3 should meet the following conditions: 1. Strength conditions. When the chassis rotates in equilibrium, it should have sufficient strength transmission torque. The resistance torque mainly comes from the friction torque formed by overcoming the sliding friction of the sealing pair when the chassis rotates, and the damping torque M 2 formed by overcoming the liquid damping. The rotational speed is designed to be extremely low, so the damping torque 3 ⁇ 4 ⁇ 2 is extremely small relative to the frictional moment M 1 and can be ignored. Maximum torque when calculating chassis strength -
  • d The diameter of the center circle of the sealing seal sealing surface, m.
  • the chassis 3 should use its buoyancy in the liquid to balance its own gravity as much as possible in order to reduce the pressure P of the gas in the gas phase balance chamber 5 required to maintain its stable balance.
  • the pressure difference between the fluids on both sides of the dynamic sealing device 11 is effectively reduced, so that the pressure q applied to the sealing medium Lid 3 can be reduced when the design sealing specific pressure is constant, so that the friction torque during the rotation of the chassis can be reduced to reduce the power consumption of the device.
  • investment costs To this end, the chassis needs to design a certain volume of cavity ⁇ Vi to obtain liquid buoyancy. As shown in Fig. 8, a certain volume of the cavity ⁇ Vi is composed of a closed space Vi having a volume ranging from the entire chassis plane, and the design principle is very similar to that of the floating roof in the floating roof tank.
  • the stiffness condition is to ensure that the deflection deformation of the chassis is controlled to a small extent.
  • G gravitational acceleration, m/s 2 ;
  • the gas in the gas phase equilibrium chamber is closed from the beginning to the operation of the equipment, and is always in a fully closed state.
  • a gas with a certain mass in the gas phase equilibrium chamber according to the ideal gas state equation, there are:
  • the specified state 1 is the state when the gas is closed
  • the state 2 is the gas state when the device is in operation
  • the values of the respective state parameters are determined as follows:
  • Vx - gas pressure at state 1, Pa, Pl Po (absolute);
  • the temperature of the gas when Tj is one state, k takes the temperature when the working medium Lid 2 enters the tank.
  • the gas temperature at T 2 -1 state 2, k takes the temperature of the process material ⁇ .
  • Equation (12) The solution of equation (12) can be expressed as:
  • h 7 (-b ⁇ 7b 2 -4ac)/2a (12a)
  • the values of the physical quantities in the above formula are known, and the values of the coefficients a, b, c are determined, as long as h 7 With a solution in the range of 0 h 7 ⁇ h 8 , the static balance of the chassis can be achieved. Whether h 7 will have no solution or no solution in the range of 0 h 7 ⁇ h 8 , which can be qualitatively analyzed from equation (11a): when h 7 is in the range of h 7 E[0, h 8 ) When changing, P changes within the range of [PoTVT. It can be seen that the chassis can achieve static balance under the pressure of the gas phase equilibrium chamber, that is, h 7 must have a solution in the range of 0 h 7 ⁇ h 8 .
  • the value of h 7 in the equilibrium state can also be adjusted by adjusting the mass of the gas in the gas phase equilibrium chamber 5 to change the initial gas pressure P 0 .
  • the gas phase equilibrium chamber 5 is a semi-closed gas phase space, the top portion of which is closed, and the bottom portion communicates with the lower chamber of the chassis 3, and the adjustment of the stable balance state of the chassis is self-regulating.
  • the preferred location of the preferred gas phase balance chamber is to design it inside the hollow shaft 20.
  • the rotating shaft is a hollow rigid shaft, the lower part of which is fixedly connected with the chassis, the upper part is connected with the motion executing mechanism through the sliding coupling, and the shaft center positioning device is further arranged on the bottom plate of the settling tank Used to fix the center of rotation of the chassis.
  • the function of the gas phase balance chamber is to maintain a stable balance of the chassis.
  • the principle is that - in the preparation stage of the equipment operation, when the working medium Lid 2 fills the lower chamber of the chassis, the bottom passage of the gas phase balance chamber connected thereto is closed by the liquid to form a closed The initial pressure P Q . Thereafter, as the process material Lidj and the working medium Lid 2 are continuously injected into the tank, the gas in the gas phase equilibrium chamber is continuously compressed by the working medium Lid 2 , and finally the gas pressure P in a stable equilibrium state is formed, and at this time, the gas phase equilibrium chamber is applied to the chassis.
  • the force F 3 is shown as expression (9).
  • ⁇ h the amount of axial displacement of the chassis
  • the change of the force always suppresses the displacement tendency of the chassis, so that it always points to the initial equilibrium position, so the balance of the chassis is a stable balance, and the stable balance characteristic of the chassis is realized by the correlation change of the gas pressure in the gas phase balance chamber, It is a self-regulating effect.
  • the continuous settling tank involved in the technical solution of the present invention has a strong adaptability to the density change of the process material Li, and the stability and operational flexibility of the equipment are fully reflected.
  • the cross-sectional area S i and height h 8 of the gas phase equilibrium chamber can be designed and selected, and the choice of these two parameters will affect the sensitivity of the gas phase equilibrium chamber to the pressure swing adjustment of the chassis.
  • the function of the dynamic sealing device 11 is to close the working medium Lid 2 in the lower chamber of the chassis 3.
  • the dynamic sealing device 11 is specially designed between the chassis 3 and the annular gap formed by the groove body 1.
  • the dynamic sealing device is also composed of the rotary seal pair ZF ⁇ ZF 2 and the flat seal pair PFi, PF 2 , PF 3 , PF 4 . Two seals are constructed.
  • the dynamic sealing device 11 is divided into two major components: a moving ring group 27 and a static ring group 25.
  • the moving ring group 27 is sealed and welded to the chassis 3, and the stationary ring group 25 is sealed and welded to the groove body 1.
  • the sealing medium Lid 3 is first injected into the cavity of the stationary ring group 25, and the sliding sealing rings 24, 26 are respectively moved to the outside of the static ring group cavity under the hydraulic pressure of the sealing medium Lid 3
  • the pair of dynamic sealing strips 22 disposed on the moving ring group 27 and the pair of static sealing strips 23 embedded in the sliding sealing rings 24, 26 respectively cooperate to form a rotary sealing pair. !
  • the sealing pressure is derived from the hydrostatic pressure q of the sealing medium Lid 3 ; at the same time, the hydrostatic pressure of the sliding sealing rings 24, 26 in the sealing medium Lid 3 Under the action of q, the sidewall of the cavity of the static ring group is pressed tightly to form two sets of translational sealing pairs of PFi, PF 2 and PF 3 and PF 4 to achieve sealing of the sealing medium Lid 3 .
  • the translational seal is equivalent to the static seal; when the chassis is axially displaced, because the sealing medium Lid 3 is incompressible, the sliding seal rings 24, 26 are synchronously displaced with the chassis, and the sealing webs PFi, PF 2 The sealing positions of PF 3 and PF 4 change accordingly.
  • the sealing pressure of the translational seal is also derived from the hydrostatic pressure q of the sealing medium Lid 3 . Sealing of the sealing medium Lid 3 is to ensure the stability of the sealing pressure of the rotary seal pair ZF ⁇ ZF 2 .
  • the rotary seal pair ZF ⁇ ZF 2 is displaced synchronously with the chassis and is always in a sealed state.
  • the pressure q of the sealing medium Lid 3 can be adjusted to improve the sealing state or the rotational load of the chassis.
  • the dynamic sealing device 11 better solves the sealing problem of the simultaneous movement of the chassis about the axis rotation and the axial translation, and is the key to the realization of the technical solution of the present invention.
  • the rotary motion of the chassis 3 in a balanced state is accomplished by a rotary power system consisting of a motion executing mechanism 18, a sliding coupling 19 and a rotating shaft 20.
  • the speed reduction mechanism of the motion actuator 18 adopts a planetary cycloid reducer, the motor adopts a variable frequency speed control motor, and the structure of the speed reducer is a motor direct connection type.
  • the technical advantage of the selection is that the overall structure of the motion actuator 18 is very compact.
  • the transmission ratio is large, the output torque is large, and the equipment is light in weight.
  • the use of variable frequency speed regulating motor can effectively control the chassis torque and ensure the safe operation of the equipment; the two can easily adjust the mud load and enhance the operational flexibility of the equipment.
  • the function of the rotating shaft 20 is to transmit torque and drive the rotation of the chassis, and the rotating shaft 20 and the chassis 3 can be connected by a splicing connection.
  • the shaft 20 should be designed as a hollow tubular structure because of the large torque required to be transmitted and the need to double the gas phase balance chamber 5.
  • the axial center positioning device 6 is fixed to the bottom plate 4 to position the center of rotation.
  • the sliding actuator 19 is preferably coupled between the motion actuator 18 and the rotating shaft 20. Due to the axial presence of the chassis 3 The displacement stroke h 5 , the sliding stroke of the sliding coupling 19 should be greater than this stroke.
  • the chassis 3 is rotated at a constant speed under the driving of the motion actuator 18, and the external torque is zero, and the rotation does not affect the stable balance of the chassis, but the rotation of the chassis must be performed when the chassis is in a stable suspension state.
  • the chassis should not be rotated during the opening and stopping phases of the equipment.
  • the material dispersion system consists of a plurality of feed lines 2 distributed horizontally and a plurality of distributors 7 in communication therewith.
  • the feed flow rate and the distribution of the fluid in the tank are critical to the effect of settling.
  • the feed flow rate is too fast or the material is unevenly distributed in the tank.
  • the flow diffusion mode of horizontal radiation has the least influence on the sedimentation of the particles, and is also most advantageous for the distribution of the material throughout the sedimentation section. Therefore, the technical solution of the present invention preferably employs a multi-center horizontal radiation flow material dispersion system.
  • the process material Li enters the groove in the plurality of feeding pipes 2 at the bottom portion of the tank body, and each feeding material A plurality of distributors 7 are arranged on the pipeline, and the number of the feed pipelines and the distributors is determined according to the settlement section size and the material flow rate of the settlement equipment.
  • the process material Lid! diffuses horizontally to the surroundings with each distributor as the radiation center.
  • the preferred solution provided by the present invention is as follows: As shown in FIG. 3, a plurality of mechanical collectors 9 are arranged radially above the plane of the chassis at different positions in the projection direction of the settlement section, and the chassis 3 rotates at an angular velocity ⁇ around the center of rotation 0 at a constant speed.
  • the mechanical collector rotates around the respective rotation centers Oi at an angular velocity (Oi), and the relative movement trajectory with the chassis forms a plurality of annular spiral belts tangential to each other in the plane of the chassis, during a certain period of motion,
  • the relative motion trajectory of the two can complete the collection process of the sedimentation mud throughout the entire settlement section.
  • the mud discharging system is composed of a mud discharging pipe 8, a mechanical collector 9, a driving mechanism 10, a buffer tank 12, and a mud discharging pump 13.
  • the structure of the mechanical collector 9 is as shown in Figs. 6 and 7.
  • a scraper disc 28 is vertically arranged inside the mechanical collector. When the mechanical collector rotates under the action of the respective driving mechanism 10, the scraper disc is rotated.
  • the scraping mud plate is closely attached to the surface of the chassis by the gravity of the sediment and the reaction force of the sedimentation mud when scraping the mud, and the sedimented mud deposited on the chassis is scraped off, and the collected sludge is collected in the suction pump of the mud pump 13 and the process material Lic
  • the liquid column under the static pressure is carried by the liquid in the sludge zone outside the discharge tank.
  • FIG 3 is a schematic view of the principle of discharge of sedimentation mud, each of which is controlled by a mechanical collector 9 on the plane of the chassis 3 to control the collection of sedimentation mud in an annular region, each annular region being concentric with each other, due to the annular region controlled by each mechanical collector
  • the area is different, so the sewage load is also different.
  • each mechanical collector should use different working speeds (Oi and the speed can be adjusted by frequency conversion.
  • the frequency conversion adjustment is another important technical means for adjusting the composition and flow of the sedimentation tank of the settling tank according to the technical scheme of the invention.
  • the discharge load is not equal, and each mechanical collector should be provided with a mud discharge line 8 to eliminate the adverse effects of unequal pipe resistance on the sewage.
  • the buffer tank 12 is a closed container with a relatively large volume. The function is to collect the sewage from each mud discharge pipe, so that the mud pump 13 can work under a relatively stable flow rate, stabilize the working condition, and improve the efficiency.
  • the liquid discharge device 17 is disposed at the top of the settling tank, and is configured to weld the zigzag overflow weir along the sedimentation tank body 1 and communicate with the liquid discharge pipe, and the clarified clear liquid is discharged into the overflow weir and then discharged out of the tank. .
  • the main function of the roof structure 21 is to support the motion actuator 18, and the closed roof structure can isolate the sinking tank from the outside, and protect the material Li in the tank from oxidation, pollution and heat preservation.
  • the control system is a central nervous system that must be provided for the continuous settling tank of the technical solution of the present invention, and the monitoring of the working state of the equipment and the execution of the operating instructions are all performed by the control system.
  • the control system consists of a servo pump 14, a tank 15, an appliance, a meter and a control platform 16.
  • Fig. 9 is a flow chart showing the flow control of the continuous settling tank according to the technical solution of the present invention.
  • the control system includes the following monitoring and control functions:
  • the monitoring and display of the operating status of the equipment includes the following contents: a.
  • Level monitoring and display including the position or stroke of the chassis balance, and the liquid level LIT of Lid 2 in the tank.
  • e the shaft stress monitoring NE-NI and chain I, the chain is designed to give a given parameter value, can not be arbitrarily modified;
  • f motor frequency monitoring SE-SIC;
  • the flow sensor FT transmits the flow information of the orifice plate FO to the flow display and the controller FIC, and the FIC controls the opening of the flow regulating valve FV according to the flow setting condition until it satisfies the given condition, thereby Complete adjustment of material flow.
  • the condition setting for the FIC comes from the data conversion of the corresponding AIC.
  • a stress detecting device NE is provided at the upper end of the rotating shaft 20 for monitoring the force of the rotating shaft and the chassis.
  • the frequency of the motor is proportional to the speed of the motor, so the speed and control of the chassis and mechanical collector can be controlled and adjusted by changing the frequency of the motor. Therefore, the sludge concentration MLSS (controlling the MLSS is a range value) is adjusted to meet the needs of the change of the process material composition, the adaptability of the equipment to the material and the flexibility of operation, and the control of the sewage concentration is stable to the sludge. Subsequent processing; In addition, the change of the motor frequency is directly related to the power output of the motor. Therefore, the frequency control and regulation is also an important means to adjust the load on the chassis during the operation of the equipment.
  • the continuous settling tank involved in the technical solution of the present invention controls and regulates the chassis components unique thereto, which is the core content of the control system.
  • the entire process of the settling tank from driving, running to parking is achieved by controlling and adjusting the axial position of the chassis.
  • the chassis 3 In the operation preparation stage, the chassis 3 is placed on the bottom plate 4 of the settling tank, and there is no rotation condition. Therefore, the chassis should first be lifted off from the bottom plate of the settling tank; in the stable operation phase, the balance position of the chassis needs to be corrected and adjusted at the right time. .
  • the reason for the correction of the chassis is that the dynamic sealing device 11 always has a certain degree of leakage, which causes the working medium Lid 2 to leak to the process material Lid «leakage, which will cause the chassis to slowly sink, if not corrected in time, The chassis will inevitably come into contact with the bottom plate, threatening the safety of the equipment.
  • the position adjustment of the chassis is to adjust the machine and the machine.
  • the scraping gap h 9 (Fig. 7) between the collectors 9 is used to adjust the discharge flow rate and the discharge concentration, and in the parking phase, the chassis needs to fall back to the bottom plate of the settling tank.
  • Control and adjustment of the axial position of the chassis by the control system is accomplished by servo pump 14.
  • the control system fills the working medium Lid 2 from the storage tank 15 into the lower chamber of the chassis by controlling the opening and closing of the servo pump 14 and the associated control valve ZS, because the lower chamber is closed, based on the fluid The incompressibility, the chassis will rise slowly; in reverse operation, the chassis will slowly drop.
  • the equipment adopts automatic control of the lifting control and adjustment of the chassis.
  • the control principle is as follows:
  • the control actuator LICA-1 detects the chassis position detection information according to the level sensor LIT-1, and according to the data sent by the AIC-2. The command determines whether it has an action execution condition.
  • the control actuator LICA-1 transmits the operation command to the flow accumulation controller FQC through LY-FY data conversion.
  • the FQC controls the servo pump motor and the corresponding control valve ZS to enable the working medium Lid 2 to achieve a directional mass transfer between the lower chamber of the chassis and the tank, thereby adjusting the chassis to a specified equilibrium position.
  • the suitable height of the initial equilibrium position of the chassis is 0.8-0.9 times its axial travel h 5 .
  • the actual control parameters of the control system can be modified.
  • the LV-A When the normal liquid level range is closed, the LV-A is closed; when the liquid level in the storage tank reaches the set liquid level upper limit, and the working medium Lid 2 still flows from the settling tank to the storage tank, the LICA-2 controller will close the regulating valve LV. -C, at the same time open LV-B to deliver liquid to the drain line.
  • the upper and lower limits of the tank level are set to ensure the safety and normal operation of the equipment.
  • the function of the storage tank 15 is to store the working medium Lid 2 , which facilitates the mass transfer of the working medium Lid 2 between the storage tank and the settling tank.
  • the accessory device may not be dedicated.
  • the control system takes an interlocking control of operational commands that are related to the safe operation of the equipment.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)

Abstract

L'invention concerne un bassin de décantation en continu avec rotation équilibrée sous châssis. Il consiste en un bassin de décantation dans lequel se trouve un châssis mobile (3) et son unité d'équilibrage, le châssis étant suspendu dans la partie inférieure du bassin de décantation et étant dans un état équilibré stable. La boue déposée sur le châssis tourne à une vitesse uniforme conjointement avec le châssis qui est entraîné par un générateur rotatif. Il est prévu un certain nombre de collecteurs mécaniques (9), tournant autour de centres de rotation respectifs au-dessus du châssis, afin de recueillir la boue déposée sur le châssis. Les orbites de mouvement relatives des collecteurs par rapport au châssis sont des lignes en spirale annulaires formées sur le plan de châssis, qui sont tangentes les unes aux autres. Au cours d'une certaine période de mouvement, les orbites de mouvement relatives des deux peuvent aller d'un bout à l'autre de toute la section de décantation pour réaliser la collecte de la boue déposée et pour la décharger à l'extérieur du bassin de décantation.
PCT/CN2006/003377 2006-12-12 2006-12-12 Bassin de décantation en continu avec rotation équilibrée sous châssis WO2008071033A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2006/003377 WO2008071033A1 (fr) 2006-12-12 2006-12-12 Bassin de décantation en continu avec rotation équilibrée sous châssis
CN2006800565316A CN101547726B (zh) 2006-12-12 2006-12-12 平衡旋转底盘连续沉降槽

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2006/003377 WO2008071033A1 (fr) 2006-12-12 2006-12-12 Bassin de décantation en continu avec rotation équilibrée sous châssis

Publications (1)

Publication Number Publication Date
WO2008071033A1 true WO2008071033A1 (fr) 2008-06-19

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Country Status (2)

Country Link
CN (1) CN101547726B (fr)
WO (1) WO2008071033A1 (fr)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN107703002A (zh) * 2017-10-17 2018-02-16 中国科学院武汉岩土力学研究所 一种复合衬垫系统多相介质相互作用测试分析系统
EP3310452A4 (fr) * 2015-06-16 2019-01-02 Finnchain Oy Procédé et appareil dans un espace de traitement circulaire
CN113041668A (zh) * 2021-03-16 2021-06-29 华能南京金陵发电有限公司 一种电厂废水浓缩处理池刮泥机防卡死方法
CN116395283A (zh) * 2023-06-07 2023-07-07 湖南海滨环保科技有限公司 一种全接液组装式双盘内浮盘

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ITPR20110058A1 (it) * 2011-06-22 2012-12-23 Betonrossi S P A Dispositivo di formatura di provini in calcestruzzo
CN105854421A (zh) * 2016-06-21 2016-08-17 永兴县金业冶炼有限责任公司 一种废气管沉降室的旋转插板
CN108392859B (zh) * 2018-05-10 2023-08-22 中建三局第二建设工程有限责任公司 一种可循环使用的钢制沉淀池
CN111451840B (zh) * 2020-04-08 2021-11-30 秦皇岛齐二数控机床有限公司 一种高速自平衡转台
CN114367131B (zh) * 2021-12-27 2023-06-16 温州医科大学附属口腔医院 一种口腔科用自动石膏沉淀池

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WO2001019487A1 (fr) * 1999-09-17 2001-03-22 K Z Handels Ab Racleur a boue
GB2361196A (en) * 2000-04-12 2001-10-17 Anthony George Rawlings Scraper arm lifting mechanism
CN1562437A (zh) * 2002-03-15 2005-01-12 武奋超 平衡旋转底盘连续沉降槽

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WO2001019487A1 (fr) * 1999-09-17 2001-03-22 K Z Handels Ab Racleur a boue
GB2361196A (en) * 2000-04-12 2001-10-17 Anthony George Rawlings Scraper arm lifting mechanism
CN1562437A (zh) * 2002-03-15 2005-01-12 武奋超 平衡旋转底盘连续沉降槽

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3310452A4 (fr) * 2015-06-16 2019-01-02 Finnchain Oy Procédé et appareil dans un espace de traitement circulaire
CN107703002A (zh) * 2017-10-17 2018-02-16 中国科学院武汉岩土力学研究所 一种复合衬垫系统多相介质相互作用测试分析系统
CN107703002B (zh) * 2017-10-17 2024-01-23 中国科学院武汉岩土力学研究所 一种复合衬垫系统多相介质相互作用测试分析系统
CN113041668A (zh) * 2021-03-16 2021-06-29 华能南京金陵发电有限公司 一种电厂废水浓缩处理池刮泥机防卡死方法
CN116395283A (zh) * 2023-06-07 2023-07-07 湖南海滨环保科技有限公司 一种全接液组装式双盘内浮盘
CN116395283B (zh) * 2023-06-07 2023-08-04 湖南海滨环保科技有限公司 一种全接液组装式双盘内浮盘

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