CN1562437A - Continuous subsider with balanced rotation under chassis - Google Patents

Abstract

A continuous setting bath features that its suspended bottom tray is rotating and its discharge unit is radically reciprocating for continuously discharging solid material.

Description

Continuous subsider with balanced rotation under chassis

Affiliated technical field

The present invention relates to a kind of separator that is used for the solid particle of separating liquid---continuous subsider.

Background technology

Continuous subsider is as a kind of separator, and its outstanding feature is the continuity and the stability of lock out operation, can satisfy the objective requirement of modern industry continuous mass production, is widely adopted in fields such as environmental protection, mining and chemical industry.

Know that from theory analysis the separating power of continuous subsider is only relevant with its diameter.Diameter is big more, and separating power is strong more, and therefore, the diameter that increases continuous subsider had both helped enterprise and expanded the scale of production, and helped again improving the quality of products.But, in suitability for industrialized production, because of the lasting discharging of solid material more and more lacks effective technological means along with the increase of continuous subsider diameter, on the basis of its prior art, if only amplify the diameter of continuous subsider simply from the angle of geometric similarity, not only there is very big difficulty in the normal operation of equipment with operation, and, the cost of investment of equipment and operating cost can sharply increase, and are irrational from economic index analysis

Summary of the invention

At present, the subject matter that exists of the employed continuous subsider of the most of industrial enterprises of China is: settling area little (diameter is generally between 10-20m), technological means is backward, separative efficiency is low, automaticity is low.Because of its treating capacity is little, a lot of large enterprises can only be by increasing number of devices to satisfy the production demand, and disposable apparatus is very expensive, and the ratio that particularly contained civil engineering expense accounts for the equipment gross investment is very big.

Intense market competition requires enterprise to improve constantly product quality and expand the scale of production, and therefore, must explore new technological means, to improve the overall technology level of this kind equipment.

The present invention proposes a kind of brand-new solid material discharge method, thereby the diameter of continuous subsider can be increased exponentially (if consider economy and enterprise's production scale, being advisable with 40-50m).This technical scheme can solve the above-mentioned various shortcomings of mentioning of this kind equipment effectively with not enough.Greatly improve the maximization and the automatization level of this kind equipment.

The technical solution adopted in the present invention is: see Figure of description, the motion that rotates in a circumferential direction of parts (1) balance chassis; Parts (2) tapping equipment is made warp-wise and is moved back and forth.Both two dimensional motions are finished the discharging task of solid material.The key of this technical scheme is the design of parts (1) balance chassis and parts (2) tapping equipment.Below in conjunction with its operation principle of Brief Description Of Drawings.

One, balance chassis.The design on balance chassis is the mechanics principle that utilizes liquid buoyancy and gravity to balance each other.See Figure of description for details, force analysis carried out on the chassis:

1, under static condition, the chassis mainly is subjected to the effect as exerting oneself:

Chassis self gravitation: G=mg; (1)

Upper liquid pressure: F ₁=ρ ₁Gh ₁S; (2)

Lower liquid buoyancy: F ₂=(ρ ₂Gh ₂+ P) s; (3)

Solid material pressure: F ₃=λ (ρ-ρ ₁) gh ₁S; (4)

The chassis is immersed in the suffered liquid buoyancy of upper and lower liquid level part and counts: F ₄(5) symbol description:

M---chassis quality:

G---acceleration of gravity;

S---chassis sectional area;

s ₁---the gas-phase space sectional area;

ρ---solid material density;

ρ ₁---upper liquid density;

ρ ₂---lower liquid density;

h ₁---the top liquid level is poor;

h ₂---the bottom liquid level is poor;

λ---material solid-to-liquid ratio;

P---gas-phase space pressure;

When suffered above-mentioned each power in chassis make a concerted effort to be zero the time, the chassis will be equilibrated at a certain position in the liquid.Have this moment:

F ₁+F ₃+G＝F ₂+F ₄ (6)

With formula (1), (2), (3), (4), (5) substitution formula (6), have:

ρ ₁Gh ₁S+ λ (ρ-ρ ₁) gh ₁S+mg=(ρ ₂Gh ₂+ P) s+F ₄(6a) abbreviation obtains:

P＝ρ ₁gh ₁+λ(ρ-ρ ₁)gh ₁-ρ ₂gh ₂+(mg-F ₄)/s (6b)

For given continuous subsider design, the value of each parameter of equation right-hand member is determined, thereby can be calculated the required gas-phase space pressure P=P in balance chassis ₀

2, under operating condition, gas-phase space pressure: P=P ₀+ f (h ₂); (7)

Change along with the fluctuation of material in the operation, the original balance in chassis is destroyed, causes the chassis displacement.When micro-displacement takes place in the chassis, for lower liquid, because of its be sealing with incompressible, so the liquid level difference h of lower liquid ₂To change a lot (because of s ₁＜＜s).Know P and F according to formula (3), (7) ₂All are h ₂Function, lower liquid will change a lot to the buoyancy on chassis, this variation will greatly suppress the displacement on chassis, make the chassis reach new balance.Therefore when equipment ran well, the position on chassis was metastable, and the scope of its upper and lower displacement is very little.

When equipment operation, the chassis overcomes friction and fluid damping and the effect of the moment of resistance that produces when being subjected to from the kinetic moment of prime mover and rotation simultaneously.When the uniform rotation of chassis, its suffered bonding force square is zero.Because of the chassis is in suspended state in liquid, although its cross section is bigger, the effect of the suffered moment of resistance is little, thereby makes the rotation on chassis become possibility.Be effective carry-over moment, the chassis is designed to have the combining structure of certain rigidity.

Two, tapping equipment.The operation principle of this device is to adopt hydraulic system to drive parts (2) to do radially to move back and forth with respect to the chassis, thereby the solid material that will be deposited on the chassis is discharged in an orderly manner.This device adopts full-automatic control system, and the outer driving source of solid material drain tank mainly is the mechanical driver unit that is provided with in suction journey, the liquid level static pressure in the subsider and the parts (2) that rely on feeding engine.The solid-to-liquid ratio of discharges material is higher than existing same device.For adapting to the different material characteristic, the period of motion of tapping equipment is adjustable within the specific limits.

Beneficial effect

The beneficial effect of the technical program is: owing to adopt the mode of chassis rotation, make continuous subsider can be flat on ground, fundamentally solved the key factor that restricts such equipment enlarging, device diameters increases exponentially.Under the identical situation of designed capacity, the equipment investment expense, particularly the civil engineering expense reduces at double; Ingenious suction journey and the liquid level static pressure that has utilized feeding engine of the solid material discharging modes that the technical program adopted reduces required machine power, and device efficiency obviously improves; Simultaneously, adopt this technical scheme, make that the equipment operation is more stable, operation is easier, can reach the automatic control level of DCS complete monitoring.

Claims (3)

1, propose the brand-new solid material discharge method of a kind of continuous subsider, this method adopts the balance rotating chassis, and the employing of this method and device diameters are irrelevant.

2, continuous subsider according to claim 1 is characterized in that: the chassis is suspended in the bottom of continuous subsider, is in poised state, horizontally rotates motion under the effect of mechanical external force, and the solid material tapping equipment is done radially to move back and forth.

3, continuous subsider according to claim 1 is characterized in that: the continuous subsider bottom level places on the basis, no cone angle.