Application of BY- spray form
Author：adminView：5051adddate：2016-11-28
Different spray methods have their own characteristics, people use their characteristics to different combustion and non combustion equipment, play its functions.
A solid spray nozzle
A solid spray is a fuel or other working substance uniformly distributed on the spray cone cross section. The nozzle can be divided into two types: one is a simple direct nozzle, its spray cone angle is very small (less than 15), or even approximate linear injection. It has a long range and a maximum impact. In combustion equipment is also widely used. In non combustion equipment also has applications, such as cleaning equipment, injection, cooling, lubrication, fire and other industries.
The other is that a swirl blade is arranged in the nozzle shell, and the spray cone angle can be 50 DEG to 120 DEG. , the impact of the minimum. The most widely used in non combustion equipment, can also be used for cleaning, cooling, fire protection, humidification, dust, etc.. General solid spray coarse grain size, in order to reduce the granularity can also use air or steam assisted atomization.
The hollow spray nozzle
In the above spray mode, it is one of the most stringent quality requirements of spray (especially on the air and ground gas turbine combustion chamber.). In addition to this kind of nozzle is widely used in industrial furnaces, boilers, internal combustion engine and gas turbine combustion equipment, non combustion equipment also has a wide range of applications. Because it can get the smallest mean diameter, the spray pressure, spray angle and flow under the same treatment, can make the workpiece surface area increases, and is more delicate, have a greater impact on the material movement. Therefore, the hollow spray nozzle has a good effect on gas cooling, air humidification, metal processing, dust control, gas cleaning and chemical reaction on the use, production, spraying and other industries equipment widely used in powder. Hollow spray nozzle can also use air or steam assisted atomization.
3) fan spray nozzle
Can let the fan spray fluid from the nozzle clamping part and a plurality of holes or multiple injection can also be produced by rake; working fluid through a circular jet impact surface or through the long hole section outlet nozzle, the nozzle of V shaped slot forming. The impact of direct nozzle spray angle after the small, a row or draining it according to certain intervals (cleaning) of the curtain, translational mass crushed gravel, pipeline cleaning the workpiece and arranged according to a certain space of fruits and vegetables; can also use the jet air flow on the cold (hot) parts of the cooling, drying, washing etc..
(3) nozzle layout
As can be seen from the above various spray: spray cone angle (or fan angle) from the beginning of the nozzle end, with the increase of axial distance, spray spread section (or the transverse size is larger). For a gas turbine annular combustor has multiple (up to more than and 30) distribution on the circumference; also on the non combustion equipment cleaning, lubrication, coating device arrangement is required. A large number of nozzle flow uniform distribution (or spray volume flux) to achieve, the functional requirements of equipment. This must prevent inappropriate liquid mist overlap, the layout of the nozzle to be arranged.
Strictly speaking, the best to ensure flow, spray cone angle, spray nozzles, spray quality (i.e. the volume flux per unit time through the liquid volume sampling unit detection area) and other basic equal conditions (of course, these data are obtained by pre detection), according to the torus or strip plane flow distribution to ensure the equal arrangement nozzle spacing.
In actual engineering application, it is difficult to carry out according to the above requirements. For example, in the early aviation engine combustion chamber nozzle arrangement on (or consistency) is a test to determine the adjustment. Nozzle spacing is appropriate or not will react in the following performance:
Spiral nozzle, industrial nozzle, nozzle, nozzle
1 outlet temperature field changes, the general nozzle spacing is too large. Exit temperature distribution coefficient (or export hot spot distribution coefficient OTDF) is too large (especially in high power state is particularly prominent);
2) low load combustion deterioration, general nozzle spacing is too small, the number of nozzle is too much, the same conditions and total amount of oil nozzle size, each nozzle will reduce the amount of oil, oil pressure, the deterioration of the quality of fuel atomization, combustion efficiency, ignition combustion stability difficult. These performance parameters and performance can be determined through the combustion chamber scheme selective test, and then make the nozzle quantity selection.
1) type of combustion chamber is different, the same type of nozzle consistency are also different, such as the use of a single pressure nozzle or tube type
The combustion chamber, the general consistency value is about 1.1, leaving enough interconnector installation size and ensure the clearance of flame tube circumferential inlet requirements; and for the annular combustion chamber, the spray cone is compressed by the effect of the flame tube head and the main combustion zone of the outer wall of the air inlet, the longitudinal section is oval, in order to prevent oil cone nozzle overlap, consistency is 1.3-1.5.
2 in annular combustion chamber, different types of nozzles and the installation of the consistency is also different:
Fuel tube a.T - evaporation pipe thickness is less than 1, R small 0.5. This is due to the mixture of oil and gas pipe from the spray jet could not produce a large spray cone, and immediately into the head of the corresponding recirculation zone.
B. tangential installation of pressure atomization nozzle consistency, general LX / hf>1.5, such as GTCP36-300, WTQ-l, etc.. If taking circumferential grading, in order to ensure the performance of high operating conditions, its consistency is about 1.5.
Under the low working condition, the spray cone angle of C. oil return nozzle becomes larger, its consistency value can be larger, and its spray angle reaches 90 degree soil of 5 degrees. So the consistency reaches about 2.
D. fan nozzle situation has been discussed before,
A solid spray nozzle
A solid spray is a fuel or other working substance uniformly distributed on the spray cone cross section. The nozzle can be divided into two types: one is a simple direct nozzle, its spray cone angle is very small (less than 15), or even approximate linear injection. It has a long range and a maximum impact. In combustion equipment is also widely used. In non combustion equipment also has applications, such as cleaning equipment, injection, cooling, lubrication, fire and other industries.
The other is that a swirl blade is arranged in the nozzle shell, and the spray cone angle can be 50 DEG to 120 DEG. , the impact of the minimum. The most widely used in non combustion equipment, can also be used for cleaning, cooling, fire protection, humidification, dust, etc.. General solid spray coarse grain size, in order to reduce the granularity can also use air or steam assisted atomization.
The hollow spray nozzle
In the above spray mode, it is one of the most stringent quality requirements of spray (especially on the air and ground gas turbine combustion chamber.). In addition to this kind of nozzle is widely used in industrial furnaces, boilers, internal combustion engine and gas turbine combustion equipment, non combustion equipment also has a wide range of applications. Because it can get the smallest mean diameter, the spray pressure, spray angle and flow under the same treatment, can make the workpiece surface area increases, and is more delicate, have a greater impact on the material movement. Therefore, the hollow spray nozzle has a good effect on gas cooling, air humidification, metal processing, dust control, gas cleaning and chemical reaction on the use, production, spraying and other industries equipment widely used in powder. Hollow spray nozzle can also use air or steam assisted atomization.
3) fan spray nozzle
Can let the fan spray fluid from the nozzle clamping part and a plurality of holes or multiple injection can also be produced by rake; working fluid through a circular jet impact surface or through the long hole section outlet nozzle, the nozzle of V shaped slot forming. The impact of direct nozzle spray angle after the small, a row or draining it according to certain intervals (cleaning) of the curtain, translational mass crushed gravel, pipeline cleaning the workpiece and arranged according to a certain space of fruits and vegetables; can also use the jet air flow on the cold (hot) parts of the cooling, drying, washing etc..
(3) nozzle layout
As can be seen from the above various spray: spray cone angle (or fan angle) from the beginning of the nozzle end, with the increase of axial distance, spray spread section (or the transverse size is larger). For a gas turbine annular combustor has multiple (up to more than and 30) distribution on the circumference; also on the non combustion equipment cleaning, lubrication, coating device arrangement is required. A large number of nozzle flow uniform distribution (or spray volume flux) to achieve, the functional requirements of equipment. This must prevent inappropriate liquid mist overlap, the layout of the nozzle to be arranged.
Strictly speaking, the best to ensure flow, spray cone angle, spray nozzles, spray quality (i.e. the volume flux per unit time through the liquid volume sampling unit detection area) and other basic equal conditions (of course, these data are obtained by pre detection), according to the torus or strip plane flow distribution to ensure the equal arrangement nozzle spacing.
In actual engineering application, it is difficult to carry out according to the above requirements. For example, in the early aviation engine combustion chamber nozzle arrangement on (or consistency) is a test to determine the adjustment. Nozzle spacing is appropriate or not will react in the following performance:
Spiral nozzle, industrial nozzle, nozzle, nozzle
1 outlet temperature field changes, the general nozzle spacing is too large. Exit temperature distribution coefficient (or export hot spot distribution coefficient OTDF) is too large (especially in high power state is particularly prominent);
2) low load combustion deterioration, general nozzle spacing is too small, the number of nozzle is too much, the same conditions and total amount of oil nozzle size, each nozzle will reduce the amount of oil, oil pressure, the deterioration of the quality of fuel atomization, combustion efficiency, ignition combustion stability difficult. These performance parameters and performance can be determined through the combustion chamber scheme selective test, and then make the nozzle quantity selection.
1) type of combustion chamber is different, the same type of nozzle consistency are also different, such as the use of a single pressure nozzle or tube type
The combustion chamber, the general consistency value is about 1.1, leaving enough interconnector installation size and ensure the clearance of flame tube circumferential inlet requirements; and for the annular combustion chamber, the spray cone is compressed by the effect of the flame tube head and the main combustion zone of the outer wall of the air inlet, the longitudinal section is oval, in order to prevent oil cone nozzle overlap, consistency is 1.3-1.5.
2 in annular combustion chamber, different types of nozzles and the installation of the consistency is also different:
Fuel tube a.T - evaporation pipe thickness is less than 1, R small 0.5. This is due to the mixture of oil and gas pipe from the spray jet could not produce a large spray cone, and immediately into the head of the corresponding recirculation zone.
B. tangential installation of pressure atomization nozzle consistency, general LX / hf>1.5, such as GTCP36-300, WTQ-l, etc.. If taking circumferential grading, in order to ensure the performance of high operating conditions, its consistency is about 1.5.
Under the low working condition, the spray cone angle of C. oil return nozzle becomes larger, its consistency value can be larger, and its spray angle reaches 90 degree soil of 5 degrees. So the consistency reaches about 2.
D. fan nozzle situation has been discussed before,
