CN201373706Y - Cyclone liquid distribution device - Google Patents

Abstract

The utility model relates to a cyclone liquid distribution device used in a heat exchange product such as an evaporator, a condenser, and the like, and capable of uniformly distributing and spreading the liquid. The cyclone liquid distribution device adopts the structure that two semi-elliptical flow guiding plates in staggered arrangement are arranged in a segment of a straight pipe; the flow guiding plates are inclined relative to the pipe axis. and are arranged on two sides of the symmetry axis of the cross section of the straight pipe respectively, the included angles theta, which range from 0 DEG to 90 DEG and are formed by each flow guiding plate and the straight pipe axis, are the same; and an notch is formed at the symmetry axis of the flow guiding plates. The utility model has the advantages that the liquid can be fully and uniformly distributed on the surface of a heating element; the liquid can obtain a high flow rate; and the structure is extremely simple.

Description

Rotational flow type liquid dispensing apparatus

Technical field

The utility model relates to a kind of rotational flow type liquid dispensing apparatus, and this device is used for heat exchange series products such as evaporimeter, condenser, with the liquid uniform distribution or scatter.

Background technology

Because of evaporimeter is able to prolonged application in industrial production, people have accumulated abundant production experience, have formed complete theoretical system.Often, countercurrent flow, following current flow process and mixed flow flow process are arranged, divide kinds of processes routes such as systemic circulation, partial circulating, two-stage evaporation again according to the difference or the arts demand of rerum natura, all this kind, numerous.For present most widely used falling film evaporator, whether the circulating fluid assignment affects the cloth film even, is directly connected to the evaporation intensity and the operational efficiency of equipment.But liquid distributor commonly used is still for being placed in the tower tray cellular type structure directly over the evaporimeter heating element heater, the upper strata tower tray mainly is to enter in lower floor's distribution plate for eliminate fluid kinetic energy makes it stable, fluid exists certain liquid level on distribution plate, flow out along plate hole with zero initial velocity, liquid is distributed, and along each heating element heater surface cloth film.But because the existence of bridge on the distribution plate makes the impossible uniform distribution of liquid, more serious phenomenon is very easily to form the plug-hole phenomenon, causes the heating element heater dry combustion method.

Chinese patent application 200580028572.X discloses a kind of the utility model and has related to a kind of coiled heat exchanger, have a plurality of pipes that are wrapped on the core pipe, have a stop collar around the shell on the border of the space outerpace of these pipes and have a liquid distributor that is used in this space outerpace dispense liquid.China's utility model patent 02250269.6 discloses a kind of jockey that rotates water distributor and extension tube attached, its center tap is screwed on the bleeder of rotation water distributor by threaded engagement, the locking sealing ring is arranged in the joint between the conical indenter of bleeder and joint, when extension tube attached was passed locking sealing ring insertion bleeder, conical indenter can be pressed on the locking sealing ring on the extension tube attached.Chinese invention patent application 200410089459.X discloses a kind of sprinkler that has novel sprinkling head.It mainly is made up of joint base and sprinkling head, and the aproll mouth of described sprinkling head is provided with a flow-guiding umbrella outward, and its umbrella cover Parallel to the flow direction is provided with the arc guiding gutter.But the equipment that existing this class distributor is not suitable for as thin film evaporator and so on uses, and therefore presses for to address this problem in production practices.

Summary of the invention

The utility model provides a kind of rotational flow type liquid dispensing apparatus, this device is applicable in the heat exchange series products such as similar thin film evaporator, condenser, liquid can be uniformly distributed on the heating element heater, simultaneously can overcome the deficiencies in the prior art, have characteristics simple in structure, that the liquid dispersion effect is better simultaneously.

Rotational flow type liquid dispensing apparatus of the present utility model is to be provided with two the half elliptic deflectors that interlace mutually and arrange that tilt with the tubular axis line in straight-run of pipe, two deflectors lay respectively at the both sides of straight tube cross section symmetry axis, deflector equates with angle theta between the straight tube axis, and 0 °＜θ＜90 °, the symmetry axis place of deflector offers a breach.Concrete structure of the present utility model is referring to accompanying drawing.

Set breach is a rectangular indentation on the deflector of rotational flow type liquid dispensing apparatus of the present utility model, and the width of rectangle is shower nozzle outlet diameter/3, and the length of rectangle is shower nozzle outlet diameter/2.

Rotational flow type liquid dispensing apparatus of the present utility model, its shower nozzle sprays covering radius R and is subjected to liquid level apart from the volume flow Q in l, the device, device shower nozzle outlet diameter d, and deflector inclination angle and the relation of installing angle theta and gravity acceleration g between the straight tube axis are as shown in Equation 1:

$R=\frac{\sqrt{\frac{{16Q}^2}{{\mathrm{<figure-callout\; id="4"\; label="d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">d</figure-callout>}}^4\mathrm{\&pi;}}+2\mathrm{gl}}-\frac{4\mathrm{<figure-callout\; id="2"\; label="Q\; d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">Q</figure-callout>}}{d^{}}}{g}\&times;\frac{4\mathrm{<figure-callout\; id="2"\; label="Q\; d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">Q</figure-callout>}}{d^{}}\mathrm{tg\&theta;}\left(m\right)$

Formula 1

In the formula: the unit of R, d and l is a rice; The unit of Q is (M ³/ s); θ is in degree.

The utility model principle is that interlaced semiellipse deflector (accompanying drawing 1) is set in circular shower nozzle, form certain inclination angle [theta] with the nozzle axis line, utilize the mechanical water pump acting, the streamlined flow of fluid is forced to be converted into screw, fluid is separated from each other and scatters under action of centrifugal force.Be subjected to action of centrifugal force, the outlet fluid scatters towards periphery, finally forms the anhydrous phenomenon of hollow, for this reason, breach is set at deflector middle part, in the middle of segment fluid flow replenishes thus, makes fluid even diffusingization within the specific limits.

By formula 1 as seen: when other condition is constant, increase flow in the shower nozzle pipe, or increase the deflector inclination angle, all will increase and spray area coverage.And to obtain farther sprinkling distance, then should reduce shower nozzle outlet caliber, to obtain higher initial velocity.In actual applications, take all factors into consideration, adjust each parameters relationship, all can obtain satisfied effect.

Rotational flow type liquid dispensing apparatus has fundamentally overcome the deficiency of the distributor of tower tray cellular type structure distributor and existing other kind.At first, spiral nozzle fills fluid decentralized, evenly is injected in the heating element heater end, has created necessary condition at heating element heater surface cloth film for liquid; Secondly, spiral nozzle makes full use of fluid dynamic energy, contacts with heating element heater at a relatively high speed, and it is more active to make that fluid flows on the heating element heater surface, has increased relative velocity, has strengthened convection heat transfer' heat-transfer by convection, has improved evaporation intensity; Once more, higher surface velocity plays the physics flushing action, destroys hot dirty formation condition, slows down the accumulation of heat dirt on the heating element heater surface greatly, prolongs the equipment cleaning frequency, reduces equipment utilization and operation cost; In addition, the spiral nozzle bore is bigger, and fluid high-speed flows, and fluid scouring has been stopped clogging in addition.Be also shown in from accompanying drawing, structure of the present utility model is extremely simple, and it only is to constitute by two oval deflectors of arranging that interlace are set in a straight tube, so the difficulty of its manufacturing and cost all are far smaller than any liquid distributor of the prior art.It is simultaneously of the present utility model which kind of is also more compact than prior art, shared space minimum when it is used for various evaporimeter, so can also reduce the volume of evaporimeter relatively.

Usually, one positive cone is installed in equipment such as barometric condenser scatters liquid, one back taper is installed again to be collected, so repeatedly, multilayer assembling increasing the material contact area, both can fluid be fully loose and was turned usefulness into if wherein use the utility model, can play desirable effect, also further simplified apparatus structure.

Description of drawings

Fig. 1 is a generalized section of the present utility model.Fig. 2 is along guide face plan-position generalized section.Fig. 3 is Figure 1A-A position profile figure.Fig. 4 is a calculation of parameter schematic diagram of the present utility model, this figure deflector in the straight tube 4 that only draws for simplicity's sake, and it is analysed and observe the position and is equivalent to dissect along the edge of a deflector.

The specific embodiment

The utility model is below in conjunction with description of drawings.

Referring to accompanying drawing 1, the utility model is to interlace to fixedly install two blocks of semiellipse plates 2 and 3 in a straight tube 4, the shape of deflector is referring to accompanying drawing 2, the elliptic parameter of each deflector is identical with the interior elliptic parameter that straight tube 4 inwall inclined cross section form, like this can be with half complete closed of straight tube 4 when a deflector is fixed in the straight tube.Two deflectors described in the utility model interlace and arrange and to be meant that a deflector is fixedly installed on the left side of straight tube, and another deflector then is arranged at the right side of straight tube, and two deflectors and straight tube axis symmetric arrangement are referring to accompanying drawing 3.Offer the breach 3 of a rectangle at the symmetry axis place of each deflector.The width of breach 3 is d/3, and length is d/2.Reckoning and actual test through theory show, its shower nozzle sprays covering radius R and is subjected to liquid level apart from the volume flow Q in l, the device, device shower nozzle outlet diameter d, and between deflector inclination angle and device straight tube axis angle theta relation as shown in Equation 1, can draw relevant parameter of the present utility model under different tube diameters and the different service condition according to formula 1.

The application example of a utility model in evaporimeter below is provided:

The heat exchange element width of evaporimeter is 1.5 meters in the example, and length surpasses 4 meters, and the spraying range that needs is bigger, and shower nozzle is for being used in combination, as calculated, and the Q=0.03 (M of single-piece shower nozzle ³/ s), d=0.11m, 1=0.6m, θ=35 °.

Expect that the spraying range of single shower nozzle is that diameter is not less than 1.5 meters circumference.

Bring above-mentioned each parameter into formula 1:

$R=\frac{\sqrt{\frac{{16Q}^2}{{\mathrm{<figure-callout\; id="4"\; label="d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">d</figure-callout>}}^4\mathrm{\&pi;}}+2\mathrm{gl}}-\frac{4\mathrm{<figure-callout\; id="2"\; label="Q\; d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">Q</figure-callout>}}{d^{}}}{g}\&times;\frac{4\mathrm{<figure-callout\; id="2"\; label="Q\; d"\; filenames="Y2009200052240006H1.png,Y2009200052240006H2.png"\; state="\{\{state\}\}">Q</figure-callout>}}{d^{}}\mathrm{tg\&theta;}$

$=0.768m$

Result of calculation is 0.768 meter of shower nozzle spray radius, and promptly diameter is 1.536 meters, reaches the target that expection is set, and is quite identical with calculated value from practical operation situation, and effect is very desirable.

Claims (3)

1, rotational flow type liquid dispensing apparatus, it is characterized in that in straight-run of pipe, being provided with two the half elliptic deflectors that interlace mutually and arrange that tilt with the tubular axis line, two deflectors lay respectively at the both sides of straight tube cross section symmetry axis, deflector equates with angle theta between the straight tube axis, and 0 °＜θ＜90 °, the symmetry axis place of deflector offers a breach.

2, rotational flow type liquid dispensing apparatus according to claim 1 is characterized in that breach set on the deflector is a rectangular indentation, and the width of rectangle is shower nozzle outlet diameter/3, and the length of rectangle is shower nozzle outlet diameter/2.

3, rotational flow type liquid dispensing apparatus according to claim 1 and 2 is characterized in that the shower nozzle spraying range and is subjected to the relation at liquid level distance, volume flow, shower nozzle outlet diameter and deflector inclination angle to meet following formula:

$R=\frac{\sqrt{\frac{{16Q}^2}{d^4\mathrm{\&pi;}}+2\mathrm{gl}}-\frac{4Q}{d^2\mathrm{\&pi;}}}{g}\&times;\frac{4Q}{d^2\mathrm{\&pi;}}\mathrm{tg\&theta;}$

In the formula: R is that shower nozzle sprays covering radius; Q is a shower nozzle inner volume flow, and unit is (M ³/ s); D is the outlet diameter of shower nozzle; L is shower nozzle outlet and is subjected to distance between the liquid level; θ is the angle between deflector and shower nozzle straight tube axis.

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