SE523819C2

SE523819C2 - Acceleration mouthpiece for nozzle

Info

Publication number: SE523819C2
Application number: SE9400244A
Authority: SE
Inventors: Per-Ingvar Nilsson
Original assignee: Per-Ingvar Nilsson
Priority date: 1994-01-27
Filing date: 1994-01-27
Publication date: 2004-05-18
Also published as: SE9400244L; SE9400244D0

Abstract

The acceleration mouthpiece comprises a nozzle which atomises and accelerates drops or accelerates gas. To the nozzle are fed three flows: a chemical flow in gas or liq. form, an atomising/accelerating medium comprising compressed air or steam and an acceleration flow comprising compressed air or steam. In a first stage, the chemical flow is finely distributed and accelerated to a drop or gas jet. In a second stage, the jet is accelerated to high speed. Through the accelerated jet, chemicals are cast out with great force to the vol. in front of the nozzle mouthpiece. With the different physical properties in the fluid/gas it is desirable to activate the fine distribution and acceleration functions in the mouthpiece. This can occur through the pressure for the chemical (8), atomising (7) and acceleration medium (4) being varied.

Description

523 819 a, b. högt konvektivt mass/energiutbyte samt stor yta/volym för strålningsutbyte som medför snabbt mass/energiﬂöde mellan vätske-/gasstrålen och omgivningen c. snabb blandning mellan stråle och annat media i gas-, vätske- och/eller fastillstånd Detalierad beskrivning av uppñnningg Uppfinningen kombinerar på unikt nytt sätt känd atomiseringsteknik med sk ej ektorprincip, se ﬁgur 1. 523 819 a, b. High convective mass / energy exchange and large surface / volume for radiation exchange which results in rapid mass / energy ﬂ desolation between the liquid / gas jet and the environment c. Rapid mixing between jet and other media in gas, liquid and / or solid state Detailed description of the invention The invention combines in a uniquely new way known atomization technology with a so-called non-vector principle, see Figure 1.

I atomiseringskanalen (l) ﬁnfördelas vätskan/gasen (8) av tryckluft/ånga (7) innanför öppningen (2). Vätskan/gasen tillförs atomiseringskanalen under tryck. Efter genomgång av öppning (2) accelereras dropp/-gasstrålen i accelerationskammaren (3) av tillförd expan- derande tryckluﬁ/ånga (4). Tryckluften tillförs via ett tunt ringmunstycke (5). Då en ring- sektion av luft rör sig utmed den mittersta och främre delen av munstycksväggen dras dropp/- gasstrålen med och bildar en accelererande stråle (6). Den accelererade dropp/gasstrålen åstadkoms både av trycklufts/ångexpansionen i atomiseringskanalen (l) som av trycklufts/- ångexpansionen i accelerationskammaren (3). Uppkomna skjuvrörelser hos dropparna/gasen åstadkommer en mestadels homogen dropp/gasstråle vars mynningshastighet och rörelse- massa vida överstiger konventionell känd tekning. Luñ/ångﬂödet genom accelerationskanalen bestäms av luft/ångtrycket (7) respektive luft/ångtryck (4) och ringmunstyckets (5) in- ställning. Det senare öppnas/stängs genom att kammarhuset (9) skruvas framåt eller bakåt medelst gänga (10). Genom att inlägga distansring vid - gängavslutet (ll) kan fasta inställningar lätt åstadkommas. Distansringar med olika tjocklek ger stora möjligheter till både exakthet och ﬂexibilitet.In the atomization duct (1), the liquid / gas (8) is distributed by compressed air / steam (7) inside the opening (2). The liquid / gas is supplied to the atomization channel under pressure. After passing through the opening (2), the drip / gas jet in the acceleration chamber (3) is accelerated by the supplied expanding pressure coil / steam (4). The compressed air is supplied via a thin ring nozzle (5). As a ring section of air moves along the middle and front part of the nozzle wall, the drip / gas jet is drawn along and forms an accelerating jet (6). The accelerated drip / gas jet is produced both by the compressed air / steam expansion in the atomization duct (1) and by the compressed air / steam expansion in the acceleration chamber (3). Shear movements of the droplets / gas occur produce a mostly homogeneous droplet / gas jet whose mouth velocity and mass of movement far exceed conventional known technology. Luñ / steam The fate through the acceleration channel is determined by the air / steam pressure (7) and the air / steam pressure (4) and the setting of the ring nozzle (5). The latter is opened / closed by screwing the chamber housing (9) forwards or backwards by means of a thread (10). By inserting a spacer ring at the thread end (ll), fixed settings can be easily achieved. Spacer rings with different thicknesses provide great opportunities for both accuracy and ibil feasibility.

Positionen på längdaxeln (x) för öppning (2) samt spridningsvinkel a är viktiga geometriska parametrar för funktionen hos accelerationsmunstycket. Spridningsvinkel (u) bestäms bland annat av längd och diameter på accelerationskanalen (l).The position of the longitudinal axis (x) for aperture (2) and spreading angle a are important geometric parameters for the function of the acceleration nozzle. Spreading angle (u) is determined, among other things, by the length and diameter of the acceleration channel (1).

Ovanstående utformning kan kompletteras med en mer ﬂexibel dysfunktion där atomiserings- öppningens position kan varieras i axelled. Denna senare utforrrming' beskrivs enlig följande, (se ﬁgur 2). 523 819 .S Öppningens (2) position på dysans längdaxel (x) har betydelse för strålens utseende och funktion efter accelerationskammaren (3). Mängden accelerationsluft/ånga till accelerationskammaren bestäms av det rörliga avståndet i ringmunstycket (5). Genom att införa gänga (10) samt gänga (12) kan båda dessa parametrar styras.The above design can be supplemented with a more dys visible dysfunction where the position of the atomization opening can be varied in shaft joint. This latter embodiment is described as follows, (see Figure 2). 523 819 .GB The position of the opening (2) on the longitudinal axis (x) of the nozzle is important for the appearance and function of the jet after the acceleration chamber (3). The amount of acceleration air / steam to the acceleration chamber is determined by the moving distance in the annular nozzle (5). By inserting thread (10) and thread (12), both of these parameters can be controlled.

Detta medför stor flexibilitet vid optimering av dysfunktionen vid olika fysikaliska egenskaper hos kemikalieﬂödet samt atomiserings/accelerationsmediet. Gastrycket i utrymme (13) kan vara ett övertryck såväl som undertryck. Vid övertryck tillförs komprimerad gas och ett ytterligare bidrag till accelerationen kan erhållas. Trycket (13) kan kontrolleras med ventil varvid inspädningen kan justeras. Accelerationskammaren kan ha olika geometñsk form dvs vara cylindrisk, divergerande konisk, konvergerande konisk, eller löpa över en icke linjär öppningsdiameter i längdaxel tex över en de Laval-profil.This entails great flexibility in optimizing the dysfunction at different physical properties of the chemical samt and the atomization / acceleration medium. The gas pressure in space (13) can be an overpressure as well as a negative pressure. In case of overpressure, compressed gas is supplied and an additional contribution to the acceleration can be obtained. The pressure (13) can be controlled with a valve whereby the dilution can be adjusted. The acceleration chamber can have different geometric shapes, ie be cylindrical, diverging conical, converging conical, or run over a non-linear opening diameter in longitudinal axis, eg over a de Laval profile.

Ovanstående utformning kan modifieras genom att accelerationskammaren utgår och ersätts av en eller ﬂera accelerationsstrålar, se ñgur 3. Efter att gas/vätskestrålen lämnat öppningen (2) träffas den, av en eller ﬂera accelerationsstrålar (14). Accelerationsstrålen ökar hastighet hos gas- och vätskestrålen. Styrkan hos accelerationsstrålen bestäms av tryck (15) samt vinkel, diameter samt kanallängd för hål (16).The above design can be modified by removing the acceleration chamber and replacing it with one or ﬂ your acceleration jets, see ñgur 3. After the gas / liquid jet has left the opening (2), it is hit by one or ﬂ your acceleration jets (14). The acceleration jet increases the speed of the gas and liquid jet. The strength of the acceleration beam is determined by pressure (15) and angle, diameter and channel length for holes (16).

Förutom trycksatt luﬁ kan även annan trycksatt gas samt ånga användas som atomiserings/- accelerationsmedia.In addition to pressurized lu ﬁ, other pressurized gas and steam can also be used as atomization / acceleration media.

Beroende på storlek av aktuella ﬂöden kan geometrin för dysan variera. Längden för förevisad dysa i figur 1 ligger inom intervallet 30-100 mm, diametem inom intervallet 15-50 mm. Beroende på tryck samt abrasivitet hos ﬂödena genom dysan kan materialvalet variera från konstruktionsplast till höglegerat stål.Depending on the size of the current ﬂ fates, the geometry of the nozzle may vary. The length of the nozzle shown in Figure 1 is in the range 30-100 mm, the diameter in the range 15-50 mm. Depending on the pressure and abrasiveness of the genom through the nozzle, the choice of material can vary from construction plastic to high-alloy steel.

Användningsexemnel Generella tillämpningsområden för aktuell uppfinning är applikationer där följande eﬁersträvas a. lång kastlängd/räckvidd hos vätske-/gasstrålen 523 819 V b. högt konvektivt mass/energiutbyte samt stor yta/volym för strålningsutbyte som medför snabbt mass/energiﬂöde mellan vätske-/gasstrålen och omgivningen c. snabb blandning mellan stråle och annat media i gas-, vätske- och/eller fastillstånd Praktiska tillämpningsexempel där uppfunnen dysa är tördelaktig: a. frystorkning och spraytorkning inom livsmedelsindustrin, farmaceutisk industri, ﬁn- kemikalietillverkning etc. b. kemisk ytmodiﬁering av partiklar, filmer etc i gasfas inom området armering, fyllning, och modiﬁering av polymera material, dispersioner etc. c. tillförsel av kemiskt aktivt eller funktionellt ämne/n in till reaktonbrännare eller flöde i tex initiator, moderator, katalysator, reaktant etc. inom petrokemisk industri, ﬁnkemika- lietillverkning, polymertillverkning, farmaceutisk respektive livsmedelsindustri. d. tillförsel av kemiskt aktivt ämne till ett rökgasﬂöde för reduktion av miljö- och anläggningsskadliga ämnen eller befrämjar anläggningsfunktion.Examples of applications General areas of application for the present invention are applications where the following are sought a. Long throw length / range of the liquid / gas jet 523 819 V b. and the environment c. rapid mixing between jet and other media in gas, liquid and / or solid state Practical application examples where the invented nozzle is disturbed: a. freeze-drying and spray-drying in the food industry, pharmaceutical industry, ﬁ n-chemical manufacturing, etc. b. chemical surface modification of particles, films, etc. in the gas phase in the field of reinforcement, filling, and modification of polymeric materials, dispersions, etc. industry, chemical manufacturing, polymer manufacturing, pharmaceuticals and foodstuffs, respectively dustri. d. supply of chemically active substance to a flue gas ﬂ fate for reduction of substances harmful to the environment and plants or promotes plant function.

Claims

1. 5 2 3 8 1 9 5 Patent claim Claim 1 Nozzle with distribution and acceleration function, characterized in that in a first stage distribution and primary acceleration to a drip / gas jet takes place, after which in a second stage the jet is finally accelerated. Claim 2 Nozzle according to Claim 1, characterized by a ring nozzle (5) which can be adjusted by means of a thread (10) for the acceleration medium to the acceleration chamber (3). Claim 3 Nozzle according to Claim 1, characterized by adjustable atomization and primary acceleration function by means of a thread (12) which can be applied to the front part of the nozzle. Claim 4 Nozzle according to claim 3, characterized in that the supply of compressed gas to space (13). Claim 5 Nozzle according to claim 1, wherein adjustability and function according to claims 2 and 3 are integrated. 1522 »819 6 Claim 6 Nozzle according to claim 1 wherein adjustability and function according to claims 2, 3 and 4 are integrated. Claim 7 Nozzle according to Claim 1, characterized by final acceleration of the drip / gas jet by means of coincident acceleration jet (s) (14). A method according to claim 8, wherein the acceleration nozzle according to claim 1 is used for selective non-catalytic nitric oxide (NyOX) reduction or for selective catalytic nitric oxide (NyOX). reduction in gas fate. y = 1 - 3, x = 1 - 5 Claim 10 Method according to claim 8, wherein the acceleration nozzle according to claim 1 is used for sulfur reduction in flue gas. A method according to claim 8, wherein the acceleration nozzle is used for supplying water or aqueous solution for humidifying air or flue gas in a combustion plant with flue gas condensation. 523 819 _? A method according to claim 8, wherein the acceleration nozzle according to claim 1 is used in freeze-drying. A method according to claim 8, wherein the acceleration nozzle according to claim 1 is used in spray drying. A method according to claim 8, wherein the acceleration nozzle according to claim I is used in chemical surface modification of particles, fibers, etc., in the gas phase in the field of reinforcement, filling and modification of polymeric materials, dispersions, etc. is used in the supply of chemically active or functional substance to reactors or desolate, eg initiator, moderator, catalyst, reactant, etc. in the petrochemical industry, chemical production, polymer production, pharmaceutical and food industry, respectively.