CN100520266C

CN100520266C - Lower jet type spraying thrust aerating and cooling tower, and jet flow cool wind machine

Info

Publication number: CN100520266C
Application number: CNB2007100507406A
Authority: CN
Inventors: 魏仕英; 魏永刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-11
Filing date: 2007-12-11
Publication date: 2009-07-29
Anticipated expiration: 2027-12-11
Also published as: CN101169312A

Abstract

The invention relates to a downward spraying type spray boosting aeration cooling tower and shooting flow air-cooler. A tower body is provided with an out revolving type spray boosting wind pumping device inside which sprays frog flow by being connected pressure hot water, a nozzle downward sprays and laminas downward pump wind; cooling medium wind enters a wind channel for one time and two times from the tower top and a wind outlet is arranged on the middle lower part of the tower wall and is provided with a wind bucket. The lower part of the spraying device is provided with layers of drenching screen stencils, the water distribution and wind leading enable the drenching even and the cold winter passes amongst the water frog flow for a plurality of times, thereby greatly elevating the heat passing efficiency. Because the wind has the same direction with the water, the disturbance of the water frog to the laminas is reduced and the wind force of the ejection flow is increased, and the praying flow injection wind is downward and also be utilized, namely the generated three air flows of lamina mechanical wind, spray injection wind and the lamina injection wind proceed the heat exchanging with the spray flow, the wind rate is increased, the gas and water rate reaches above 1.0 which is 29 to 90 percent higher than the prior upward spraying cooling towers, and the reducing temperature can be greatly elevated. The noise of the tower water flow is reduced; the tower top has no drift ice, and the working hydraulic pressure is 0.08 to 0.12MPa. Because the wind temperature is near to the water temperature, the invention can be simultaneously used as the injection flow air-cooler, and the refrigerating air-condition in winter, summer and autumn.

Description

Following spray atomizing propulsion aeration cooling tower and jetting flow blower fan

(1) technical field:

The present invention is a kind of atomizing propulsion aeration cooling tower and air-cooler.Cooling tower is to be cooling medium with air in it, drives spray-propelling atomizer with low pressure fluid power, realizes the cooling to circulating hot water.Air-cooler is to be medium with the circulating water in spray-propelling atomizer, realizes the cooling of air.All belong to medium directly contact and the heat-exchange apparatus class (F28C) of chemically reactive not.

(2) background technology:

Cooling tower is to utilize hot water and cold wind to carry out heat exchange, makes air gain of heat humidification take away heat and the equipment of cooling circulating water, and its cooling-down effect depends on following three factors: 1. cooling tower air quantity, i.e. gas-water ratio.2. mass tranfer coefficient, area and time between air water.3. the difference of hot water temperature and atmospheric moisture bulb temperature.At given environmental condition (promptly 3. water temperature difference is given) and given mass transfer condition (promptly 2. given), cooling-down effect depends on the cooling tower air quantity, usually air quantity refers to discharge cooling tower air quantity or blower fan of cooling tower nameplate air quantity, and assert that entering cold wind has all carried out getting rid of after the heat exchange.But the actual air quantity that enters can not all carry out heat exchange, and some wind can not effectively utilize, and its reason is as follows: the A. air has the characteristic that flows to the resistance Minimum Area.In filling cooling tower, it is big or do not have an aqua region that air can flow to the gap; Air tends to leave injection district spray and flows to no fog-zone in spray tower, and general injection section is apart from the about 300-500mm of jet expansion.That is to say that there is short circuit wind in existing cooling tower.B. existing cooling tower air inlet is in the tower body bottom, air outlet is at cat head, cooling tower void tower wind speed from bottom to top is about 1.5～2.0m/s, and in cooling tower moisture film or the about 9m/s of the downward flow velocity of water droplet and more than, moisture film or water droplet can stop air upper reaches (fogbound wind phenomenon occurring) like this, air becomes the backflow under the wind, often occurs this moment during cooling tower starts, and blower fan is in rotation and cat head is imperceptible that air-out arranged.

Chinese patent ' air-blower cooling tower driven by secondary jetting gravitational backwater ' (ZL97107721.9) and ' novel air-blower cooling tower driven by secondary jetting gravitational backwater ' (ZL01299902.X), see Fig. 5, dress upper spraying type external rotation type spray-driven exhausting equipment 1n in the tower body 6n, blade 1.1n updraft, once, the secondary air road is 5n1,5n2, air outlet 4n is at cat head, sprayer unit 1n spraying 1.3n is dropped in return flume 3n with air intake heat exchange cooling water from the bottom up, fall into bottom secondary injection pipe 8n through gravity pipe 2n, go up the last cold water of spray once more through secondary shower nozzle 7n and fall into water storage tank 9n.Mode with spraying is strengthened the air water mass transfer effect, replaces the electric power blower fan with jet blower, overcomes the backflow under the wind with the gravity water return secondary spray pattern.But still there are the following problems: A. establishes secondary spraying system complex structure, and cost rises, and the market competitiveness descends.B. still have short circuit wind, heat exchange is insufficient.C. fogbound wind phenomenon still exists, and cat head air outlet wind speed is reduced, and the tower wind speed if improve, and causes the cat head mist that wafts again.D. the air outlet area goes out the tower deficiency in draught less than air-admitting surface.E. tower body inner sprayer unit height must cause tower body to increase greater than 3 meters, and cost rises.

(3) summary of the invention:

Following spray atomizing propulsion aeration cooling tower and jetting flow blower fan that the present invention proposes, solve the influence of short circuit wind that existing ' spraying propulsion aeration cooling tower ' exist and fogbound wind exactly to heat exchange effect, cut down the consumption of energy, solve waft problems such as water, complex structure, noise is big of cat head simultaneously.

Its technical scheme is as follows:

The following spray atomizing propulsion aeration cooling tower, comprise tower body, air inlet and air outlet, in tower body, install the external rotation type spray-driven exhausting equipment, the water storage tank of tower body bottom that are communicated with water inlet pipe for linking to each other with outlet pipe, establish water pump in the outside inlet pipeline, it is characterized in that:

A. to establish 2, air intake tubes of air intake tube porch be an air inlet 2a at the tower body top; One time air intake tube periphery is established secondary air tube 3, and secondary air tube porch is secondary air mouth 3a; Air outlet is located at the tower body middle and lower part; Adopt tower body sidewall standard-sized sheet air port, and at the wind scoop around air port periphery dress wind-guiding; In the water inlet pipe is hot water, is cold water in water storage tank and the outlet pipe; B. external rotation type spray-driven exhausting equipment 1 is contained in air intake tube, adopts the shower nozzle of spraying downwards and the fan blade of exhausting downwards; C. the external rotation type spray-driven exhausting equipment below is provided with three layers and above trickle screen cloth on the tower body height, is the air channel with layer and interlayer space, and its structure is as follows: 1. week is circular in the trickle screen cloth, and periphery is circular or square; 2. the screen cloth of each odd-level is the minor diameter screen cloth, and the adjacent even level screen cloth in below is the major diameter screen cloth, and major diameter screen cloth diameter of bore is greater than below adjacent minor diameter screen cloth external diameter; 3. the major diameter screen cloth with one deck can be 1 or 2, and outermost edge and the sealing of tower wall; 4. ground floor screen cloth external diameter is less than relative two sprinkler spacing D1; 5. the diameter of bore of the last layer is greater than an air intake tube inside diameter D 2.Thus the water distribution of each layer trickle screen cloth, wind-guiding make trickle evenly, cold wind repeatedly navigates between the spray stream.

The below installing is communicated with water inlet pipe in the above-mentioned tower body 3 and above induced jet type swirling-flow atomizing nozzle (patent No. ZL89104110,9) are used for the discharge adjusting, and when flow met design requirement, this induced jet type swirling-flow atomizing nozzle can be cancelled and not installing.Above-mentioned air outlet area is greater than air inlet.Above-mentioned tower body is square body or round.The patent No. ZL00112630.X of above-mentioned external rotation type spray-driven exhausting equipment (following summary is a sprayer unit 1).

Jetting flow blower fan, identical with above-mentioned following spray atomizing propulsion aeration cooling tower structure major part, following difference is only arranged: 1. the air outlet area is 1/5～1/2 of a tower body sidewall standard-sized sheet open area.2. the air outlet place adorns the wind scoop and the ajutage of wind-guiding.3. being chilled water in the water inlet pipe, is hot water in water storage tank and the outlet pipe.

Beneficial effect of the present invention:

I. the sprayer unit in the cooling tower is originally upwards and sprays, and fan blade is updraft.The present invention changes nozzle into and sprays downwards, and fan blade also is downward exhausting.Solved of the influence of the fogbound wind of last spray generation thus to heat exchange effect.Spraying thrust increases (the horizontal established angle β that also can reduce shower nozzle 1.1 sees Fig. 3 to increase thrust); Water smoke is to the interference reduction of fan blade exhausting, and jet blower wind-force obviously strengthens; Add that downward spray flow injection air is also utilized, there are fan blade machinery wind, spraying injection air and three strands of air-flows of fan blade injection air to carry out heat exchange thus in the cooling tower, air quantity increases, be that gas-water ratio rises to more than 1.0, than the existing spray cooling tower height 29-90% that goes up, so the cooling tower temperature drop can greatly improve.Ii. adopt multilayer trickle screen cloth, water distribution is even, cold wind repeatedly navigates between the spray stream, and air water is long swap time, improves heat transfer condition, improves temperature drop; And simple in structure, cost is low, the life-span is long and be convenient to installation and maintenance.Iii. because air quantity and air water mass transfer condition improve, and cooling tower water pump work hydraulic pressure is reduced to 0.08～0.12MPa by 0.12～0.19MPa of former needs, save water pump electrical power 29～90%.Iv. owing to spraying down and slowing down, solve the mist problem of wafing of spray tower through the multilayer screen cloth.V. solve water droplet and fallen the noise of being rebuffed and producing after rise.Vi, nozzle diameter increases, and can be used for sewage, enlarges occupation rate of market.Vii. it is excessive less than the vapour lock that inlet-duct area causes to have solved discharge area.Viii. adopt the equidirectional and lateral flow of wind and water, air outlet and leaving water temperature are close, and cooling tower can make air-cooler, as the refrigeration of spring, summer, Qiu Sanji.

(4) description of drawings:

Fig. 1 following spray atomizing propulsion aeration cooling tower structure chart

Fig. 2 jetting flow blower fan structure chart

Fig. 3 external rotation type spray-driven exhausting equipment 1 structure chart (spray downwards, take out downwards)

Fig. 4 induced jet type swirling-flow atomizing nozzle 8 structure charts

Fig. 5 has ' novel air-blower cooling tower driven by secondary jetting gravitational backwater ' schematic diagram now

(5) specific embodiment:

Embodiment 1: see Fig. 1, Fig. 3, Fig. 4

See Fig. 1, the following formation of following spray atomizing propulsion aeration cooling tower: tower body 6 tops are established air intake tube 2 these places and are formed an air inlet 2a; Periphery is established secondary air tube 3, and this place forms secondary air mouth 3a.Sidewall standard-sized sheet air port, tower body middle and lower part, the wind scoop 9 of ponding function is equipped with at this place, forms air port 9a.When tower body was tetrahedron, wind scoop was the four sides inverted ladder-shaped body; When tower body was cylinder, wind scoop was an inverted cone.Take out air port 9a area greater than

air inlet

2a and 3a area sum.Tower body 6 is integrally welded by the steel pipe or the water pipe of many supports, and the tower wall is sealed to form by column plate 6.1, and support member 12 is established in the tower body below.Sprayer unit 1 is contained in air intake tube 2, establish vertical water inlet pipe 7 in tower body central authorities, extend up to the bottom of an air intake tube 2 at the bottom of the tower, sprayer unit 1 below is communicated with water inlet pipe 7 top ports and by at the bottom of the water inlet pipe fixed support tower, 7a is supported on ground through outer water pipe always.

See Fig. 3, sprayer unit 1 is provided with the rotary-atomizing shower nozzle 1.1 that hollow rotation hydroecium 1.3 and outer surface are circumferentially adorned two and above following spray in it, be fixed with the fan blade 1.2 of two and above downward exhausting on the hydroecium in rotation above the shower nozzle, establish four shower nozzles 1.1 and four fan blades 1.2 herein; The center is provided with and the static feed liquor mechanism 1.4 of rotating that hydroecium and atomizer water route be communicated with, and loads onto down submerged bearing 1.5 and establishes axial water hole 1.6, limit friction ring 1.7 and gland 1.8 etc. between feed liquor mechanism and rotation hydroecium.Sprayer unit 1 is connected with water inlet pipe 7 flanges 7.1 by the static lower flange 1.41 of feed liquor mechanism.

See Fig. 1, it is as follows with air channel 5 therebetween that four layers of trickle screen cloth 4 (following summary is a screen cloth) are established in sprayer unit 1 below: 1. ground floor is that minor diameter screen cloth 4.1 its external diameters are less than relative two shower nozzles, 1.1 space D 1 (D1 sees Fig. 3).2. the second layer is two major diameter screen clothes: screen cloth 4.21 internal diameters in it are slightly larger than the 3rd layer of minor diameter screen cloth 4.3 external diameter, and its center is circular air channel 5.21; Its outer screen cloth 4.22 internal diameters are greater than screen cloth 4.21 external diameters, and radial space is an annular passage 5.22 between the two, and screen cloth 4.22 peripheries are circular or square for what match with tower wall shape, and seal with the tower wall.3. the 3rd layer is minor diameter screen cloth 4.3, and endoporus is central air channel 5.3.4. the diameter of bore of the 4th layer of screen cloth 4.4 is greater than air intake tube 2 inside diameter D 2, and endoporus is central air channel 5.4; Screen cloth 4.4 peripheries are circular or square for what match with tower wall shape, and seal with the tower wall, and screen cloth 4.4 is placed on the tower body base plate 6.2.

See Fig. 4, induced jet type swirling-flow atomizing nozzle 8 structures following (following summary is last spray shower nozzle 8): press water enters spin chamber 8.2 from feed tube 8.1, air enters from the annular aspirating unit 8.3 and nozzle 8.4 injections of plural serial stage, forms diffusing flow cone 8.6 and hydrojet through hole 8.7 ejections of dispersed jet by the top in multistage mixing chamber 8.5.This is a kind of low pressure and mass flow shower nozzle.In this patent, be used to regulate the flow of above-mentioned sprayer unit 1.The water inlet pipe 8a that is communicated with last spray shower nozzle 8 is contained on water storage tank 10 liquid levels, and is communicated with vertical water inlet pipe 7 with flange.

The course of work; The low pressure hot water 7b that comes from water pump enters cooling tower from tower body bottom water pipe 7a, and vertical water inlet pipe 7 is sent into sprayer unit 1 and sent into spray shower nozzle 8 through water inlet pipe 8a through the center.See Fig. 3, enter the central passage of sprayer unit 1 low pressure hot water 1b through feed liquor mechanism 1.4, be subjected to centrifugal action to enter shower nozzle 1.1 and carry out downward spraying, the spray flow ejection oppositely promotes shower nozzle 1.1 and rotates blade 1.2 rotations that hydroecium 1.3 rotated and drove one, forms the oblique rotating spraying 1a that sprays down.See Fig. 1 and Fig. 3,, select suitable shower nozzle 1.1 established angle β to make most water smokes fall into the state of trickle screen cloth 4.21 according to the difference of hydraulic pressure.The downward exhausting of fan blade generally can guarantee to enter air intake tube 2 wind speed more than 10m/s simultaneously.Air-out speed height owing to an air intake tube 2 has ejector action, therefore establishes in the outside to have constituted secondary air road 3a between secondary air tube 3, two air ducts, and injection air enters in the tower thus.Rotating spraying is forced evaporation under wind and the effect of secondary wind, and the water vapour pressure of evaporation is the saturated vapor pressure of hot water.For example: inflow temperature is 40 ℃, corresponding saturated vapor pressure is 7.33kpa, this pressure is significantly smaller than the ambient air pressure of 100kpa, pressure reduction makes extraneous air water vapour evaporating area high speed convection in tower between the two, its convection velocity is about 190m/s, and air flows and forms the about 22kpa of negative-pressure vacuum.Thus, high speed convection is strengthened the water smoke evaporation, and vacuum increases the intake of tower.

The rotating spraying 1b overwhelming majority of the following spray of penetrating from sprayer unit 1 falls into screen cloth 4.21, and remaining falls into screen cloth 4.1 and 4.22, becomes fine water droplet and fall after slowing down.Screen cloth 4.1 water droplets directly fall into tower prodelta clay tank 10 after falling into screen cloth 4.3.Screen cloth 4.21 and 4.22 water droplet partly fall into screen cloth 4.4, another part through air channel 5.4 fall into tower prodelta clay tank or with last spray shower nozzle 8 on fall into water storage tank after the spray flow collision.Cooling water is delivered to the user by outlet pipe 11 in the water storage tank.

Wind and second wind cooling air-flow enter in the tower and at first force to flow through circular air channel 5.21 and annular passage 5.22 behind the heat exchange gain of heat humidification through sprayer unit 1 spray flow, get the annular passage area during design greater than circular air channel, the air-flow major part flows into annular passage 5.22 like this, and small part flows into circular air channel 5.21.5.22 air-flow passes screen cloth 4.3 and enters air channel 5.4 through the air channel.Air channel 5.21 air-flows are folded under the stopping of screen cloth 4.3 from the water droplet of screen cloth 4.21 whereabouts simultaneously, and both carry out flowing to air channel 5.4 again after the heat exchange.Air channel 5.4 lower stream of airflow once more with screen cloth 4.4 bottom water droplets and shower nozzle 8 on spraying carry out heat exchange, at last the involving who falls at blast and water droplet down, in wind scoop 9 exhaust outlet 9a inflow atmosphere.Wind-warm syndrome is approaching to go out water temperature because tower body Nei Shui and wind in the same way and lateral flow, go out, so air-out is not hot blast but a little more than going out water temperature, is lower than the wind of atmosphere dry-bulb temperature.

Embodiment 2: jetting flow blower fan

See Fig. 2, with embodiment 1 following spray atomizing propulsion aeration cooling tower structure except that following, all identical, difference: 1. if tower body 9 is a tetragonal body, then the air outlet area is 1/4 of a tower body sidewall standard-sized sheet air port area, i.e. three sealings of tower wall have only one side that wind scoop 9 is housed.2. on wind scoop, adorn ajutage 13.3. be chilled water (7～20 ℃) in the water inlet pipe 7, air intake is hot wet wind, and air-out is cold wet wind.Be the hot water after raising in water storage tank and the outlet pipe.

Claims

1. following spray atomizing propulsion aeration cooling tower, comprise tower body (6), air inlet and air outlet, in tower body, install the external rotation type spray-driven exhausting equipment (1), the water storage tank (10) of tower body bottom that are communicated with water inlet pipe (7) for linking to each other with outlet pipe (11), establish water pump in the outside inlet pipeline, it is characterized in that:

A. an air intake tube (2) is established at the tower body top, and an air intake tube porch is an air inlet (2a); One time air intake tube periphery is established secondary air tube (3), and secondary air tube porch is secondary air mouth (3a); Air outlet is located at the tower body middle and lower part; Adopt tower body sidewall standard-sized sheet air port, around air port periphery dress wind scoop (9); In the water inlet pipe (7) is hot water, is cold water in water storage tank and the outlet pipe;

B. external rotation type spray-driven exhausting equipment (1) is contained in the air intake tube (2), adopts the shower nozzle (1.1) of spraying downwards and the fan blade (1.2) of downward exhausting;

C. three layers and above trickle screen cloth (4) are established in the external rotation type spray-driven exhausting equipment below on the tower body height, are air channel (5) with layer and interlayer space, and its structure is as follows: 1. week is circular in the trickle screen cloth, and periphery is circular or square; 2. the screen cloth of each odd-level (4.1,4.3) is the minor diameter screen cloth, and the adjacent even level screen cloth (4.2,4.4) in below is the major diameter screen cloth, and major diameter screen cloth diameter of bore is greater than below adjacent minor diameter screen cloth external diameter; 3. the major diameter screen cloth with one deck is 1 or 2, and outermost edge and the sealing of tower wall; 4. ground floor screen cloth (4.1) external diameter is less than relative two shower nozzles (1.1) space D 1; 5. the diameter of bore of the last layer is greater than an air intake tube inside diameter D 2.

2. by the described cooling tower of claim 1, it is characterized in that the below installing is communicated with water inlet pipe in the tower body 3 and above induced jet type swirling-flow atomizing nozzle (8).

3. by the described cooling tower of claim 1, it is characterized in that tower body is square body or round.

4. by the described cooling tower of claim 1, it is characterized in that the air outlet area greater than once with secondary air open area sum.

5. jetting flow blower fan, comprise tower body (6), air inlet and air outlet, in tower body, install the external rotation type spray-driven exhausting equipment (1), the water storage tank (10) of tower body bottom that are communicated with water inlet pipe (7) for linking to each other with outlet pipe (11), establish water pump in the outside inlet pipeline, it is characterized in that:

A. an air intake tube (2) is established at the tower body top, and an air intake tube porch is an air inlet (2a); One time air intake tube periphery is established secondary air tube (3), and secondary air tube porch is secondary air mouth (3a); Air outlet is located at the tower body middle and lower part; The air outlet area is 1/5～1/2 of a tower body sidewall standard-sized sheet open area, and is adorning wind scoop (9) and ajutage (13) around the air port periphery; In the water inlet pipe is chilled water, is hot water in water storage tank and the outlet pipe;

B. external rotation type spray-driven exhausting equipment (1) is placed in the air intake tube (2), adopts the shower nozzle (1.1) of spraying downwards and the fan blade (1.2) of downward exhausting;

C. three layers and above trickle screen cloth (4) are established in the external rotation type spray-driven exhausting equipment below on the tower body height, and reaching with layer and interlayer space is air channel (5), and its structure is as follows: 1. week is circular in the trickle screen cloth, and periphery is a circle or square; 2. the screen cloth of each odd-level (4.1,4.3) is the minor diameter screen cloth, and the adjacent even level screen cloth (4.2,4.4) in below is the major diameter screen cloth, and major diameter screen cloth diameter of bore is greater than below adjacent minor diameter screen cloth external diameter; 3. the major diameter screen cloth with one deck is 1 or 2, and outermost edge and the sealing of tower wall; 4. ground floor screen cloth (4.1) external diameter is less than relative two shower nozzles (1.1) space D ₁5. the diameter of bore of the last layer should be greater than an air intake tube inside diameter D ₂

6. by the described air-cooler of claim 5, it is characterized in that the below installing is communicated with water inlet pipe in the tower body 3 and above induced jet type swirling-flow atomizing nozzle (8).

7. by the described air-cooler of claim 5, it is characterized in that tower body is square body or round.

8. by the described cooling tower of claim 5, it is characterized in that the air outlet area greater than once with secondary air open area sum.