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1 Products availableLeading Manufacturer, Supplier & Retailer of variable flow desuperheating system and Pressure Reducing And Desuperheating System.
When it comes to the performance of a turbine surface condenser in the operational field of a steam turbine cycle, you need utmost reliability and efficiency. Here’s where Jet Flow’s know how is invaluable. We createcustomise package solutions for each particular customer’s needs.
Our General Scope of Supply:
Jet Flow designs, manufactures and supplied overall Condensing System packages involving basic and detail engineering, procurement, testing and delivery. Condensers are manufactured in diverse materials. Tubes are made of carbon steel, stainless steel, Cu and Nickle alloys, Titanium and Duplex. Tube sheets can be solid type or cladded, according to the quality and nature of the cooling water. All components aremounted or prefabricated in our workshop in common or separated steel base frames.
Legend:
Lub oil reduces friction between moving mechanical parts and also removes heat from the components.
As a result, the oil becomes hot. This heat is removed from the lube oil by a cooler to prevent both breakdown of the oil and damage to the mechanical components it serves.
The lube oil temperature must be maintained within a specific operating band to ensure optimum equipment performance.
Lube oil coolers are designed based on the customer specifications. Designs are available as single coolers or duplex coolers with change over valves.
Duplex coolers can be supplied either in standard Horizontal design or vertical design if space is constrains.
Dump Condensers are used to recover large amounts of steam that may otherwise be vented to the atmosphere. During fluctuating steam loads, turbine trip off, turbine start-up, or bypass, the excess steam that would ordinarily be vented can be diverted to a dump condenser. Dump Condensers may also be used for process plants when upset demand conditions occur.
A dump condenser is required when the steam consumption needs to be drastically reduced in a very short period of time and when the boiler cannot follow this variation.
Features :
Designs to eliminate excessive vibrations and water hammer Standard materials are carbon steel with stainless steel tubes. Special materials are available for severe duty or other applications.
Dump Condenser can be furnished as a system which may consist of Steam Pressure/Temperature Reducing Station and Condensate Recovery System which includes Level Controls, Condensate Pumps, and Electrical Control Panel for automaticoperation.
Jet Flow Variable Flow or Multi Nozzle Desuperheater; regulates the amount of injected water by varying the number of orifices during operation. The ensures that the spray water pressure remains constant at all loads and an excellent and almost uniform spray quality is achieved over the full operating range, thereby minimising the tendency of spray water to accumulate in the steam line. Opening of the orifices is regulated by the positioning of a piston operated actuator directly mounted on the desuperheater. This compact and simple design ensures no separate spray water Injection control valve is required. A high turndown of 50 : 1 is standard.
The needs of the power generation industry include year-in and year-out reliability, optimum performance for maximum efficiency, and absolute on-time delivery to meet plant outage schedules.
All of the Jet Flow Feed Water Boiler Heaters are designed in accordance with HEI standards, TEMA and ASME codes. Jet Flow uses state-of-the art computer programs to perform the thermalhydraulic and mechanical design of each Feed Water Heater we fabricate.
Jet Flow designs and manufactures both Low Pressure (LP) and High Pressure (HP) feed water heaters which may be installed either vertically or horizontally, depending on the plant design requirements.
Each Jet Flow LP / HP Feed Water Heater will contain from one to three separate heat transfer areas of zones including the Condensing, De-superheating and Sub-cooling zones. Our heaters can be provided with multiple zones within the shell side:
Jet Flow Feed Water Heaters are designed for specific thermal conditions and manufactured for a singular purpose. Whether it be sophisticated designs involving extreme superheat, abnormal flow conditions or dissipation of high energy fluids.
In addition, Jet Flow provides innovative and practical concepts to ensure peak heater performance from installation to testing through full or part load operation. We offer a multitude of design configuration for de-super heater and drain cooler zones as well as the latest channel closure techniques.
All shell & tube heat exchangers, irrespective of the type of service for which they were designed, must withstand severe service conditions. The service life of feed water heaters, however, is one of the toughest because of the longevity and reliability factors inherent in power plant equipment designs. Jet Flow thorough understanding of these factors enhances its ability to communicate clearly with power design engineers. Jet Flow designs enable power engineers to anticipate maximum efficiency from the turbine extraction steam in preheating the boiler feed water.
Scope offering:
The Steam Surface condenser is a critical component of both the traditional coal fired power plant and the new generation cogeneration and combined cycle power plants.
Main duties of any Surface Condenser are to convert the exhaust steam from its gaseous to its liquid state at certain under atmospheric pressure, and also, to release non-condensable presented in the steam cycle, together with vacuum unit.
Jet Flow designs and economically sized condenser suitable for smaller turbine ratings under 100 MW. The circular configuration is compact for easy shipping and maintains the level of quality afforded all of our condenser designs.
All of Jet Flow’s Surface Condensers are designed and built to the Heat Exchange Institute latest Standards.We also strive to meet all of our client’s project specific requirements.
Our Condenser design can incorporate enhanced deaeration systems, and or a variety of turbine exhaust options including Axial and Top steam inlet design, which can assist greatly in improving plant layouts. We continually address and refine these and other considerations associated with circular designs where space is at a premium.
Jet Flow Surface Condensers are fabricated in-house state of the art fabrication facilities located in Ahmedabad. All of the fabrication facilities are according toASMEcode and an impeccable reputation for quality fabrication and on time delivery.
Our Surface Condensers feature high overall heat transfer coefficient (which result in smaller heat transfer areas and thus optimal use of the available space) and extremely low oxygen concentrations in the condensate. They are designed to stand up to turbine and steam generator overloads and to variations in cooling water temperature at different times of the year.
Jet Flow Surface Condenser highlights:
Air cooling zone is provided in the coolest part of the condenser, which minimise the carry overof the steam to the ejector vacuum system alongwith the non condensable gases.
Geothermal Steam Condensers:Jet Flow has many years of experience designing vacuum Condensers with high non-condensable loads. Since Geothermal steam is highly corrosive and contains large amounts of non-condensable gases, the design and fabrication of Geothermal Steam Condensers is radically different than conventional power plant condensers. Special attention to be given on reduced overall heat transfer rates and LMTD due to high amount of non condensable gases, pressure drop, sub-cooling, flow path for venting large volumes and material selection to prevent corrosion. Associated vacuum system is Multi stage Steam Ejectors with direct OR in-direct type inter condensers.
Jet Flow Safety Valve represent the most advance technology in value designed for use in intermediate power boiler and organic fluid vaporizer service. Built in conformance to section I of the ASME boiler and pressure vessel code, all capacities am certified by the national board of boiler and pressure vessel inspector at 5% over pressure.
Jet Flow Designed Safety Valve with Full Nozzle & hardened disc to minimize maintenance and increase seat life Open bonnet & Close bonnet both design have maximum set pressure 75 bar in Safety Valves.
Technical Details :
While Enquiry Please Specify :
A Steam Conditioning Valve / Combined PRDS Valve is the combination of pressure reduction and temperature reduction of superheated steam to fit process needs, protect downstream equipment or allow the use of less expensive materials or schedules for downstream piping. This is done with a pressure reducing valve and a spray water addition section either as separate units or a single device. Pressure reduction is carried out with a pressure reducing trim within the valve body, usually multi stage pressure reduction. The pressure is controlled by an upstream or downstream pressure controller, signaling the valve to modulate to maintain the pressure at the required set point.Temperature is controlled by adding water to the steam in such away that it will get fully evaporated in the steam, termed as desuperheatmg.
These applications are normally considered to be some of the most severe services of any valves in a modem steam plant.
A Steam Conditioning Valve Jet Flow steam conditioning valve with revolutionary multinozzle atomizer and feed forward design adds to our latest generation of quality valves. The equipment is utilised for simultaneous pressure and temperature reduction of steam. The cooling water is introduced in the highest turbulent zone of the steam. High steam velocity at this point, results in the highest coefficient of heat transfer between the steam and water. The feed forward design assures soft misty spray and instantaneous temperature control over the full range of steam flow.
Steam Conditioning Valve Jet Flow steam conditioning valves are available in a variety of combinations. These valves are made as per tailor made requirements of customers. The valves are manufactured in angle, Z and globe forms. Spray water entry is from the top through hollow stem as well as from the bottom, depending upon the process parameters.
Applications are but not limited to:
Multi-Stage Multi-Path Pressure Reduction via Velocity Control trim technology:
Applications:
Advantage of Jet Flow Steam Conditioning Valvewith Jet Stack Velocity Control trim and laval jet nozzle -
Requirements -
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Specification
Bill of Material | |
Item Description | Material |
Nozzle Insert | A182 GR F11 / F22 / F91 |
Body (Lower Part) | A182 GR F11 / F22 / F91 |
CW INLET | A105 |
DISC | DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
CONE / PUG | DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
SEAT | DIN 1.4122 PLASMA NITRIDED / A 182GR F11 / F22 / F91 ST |
MAIN BODY | A 182 GR F11 / F22 / F91 |
CAGE / INLET CYCINDER | DIN 1.4122 PLASMA NITRIDED |
STEM | DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
PISTON RINGS | X120 Cr 29 |
SEALS | GRAFOIL |
BONNET / COVER | A182 GR F11 / F22 / F91 |
BONNET / FLANGE | A 182 GR F11 / F22 / F91 |
---- | |
Other grades of material are also used depending upon design requirements. |
A Steam Conditioning Valve / Combined PRDS Valve is the combination of pressure reduction and temperature reduction of superheated steam to fit process needs, protect downstream equipment or allow the use of less expensive materials or schedules for downstream piping. This is done with a pressure reducing valve and a spray water addition section either as separate units or a single device. Pressure reduction is carried out with a pressure reducing trim within the valve body, usually multi stage pressure reduction. The pressure is controlled by an upstream or downstream pressure controller, signaling the valve to modulate to maintain the pressure at the required set point.Temperature is controlled by adding water to the steam in such away that it will get fully evaporated in the steam, termed as desuperheatmg.
These applications are normally considered to be some of the most severe services of any valves in a modem steam plant.
Jet Flow steam conditioning valve with revolutionary multinozzle atomizer and feed forward design adds to our latest generation of quality valves. The equipment is utilised for simultaneous pressure and temperature reduction of steam. The cooling water is introduced in the highest turbulent zone of the steam. High steam velocity at this point, results in the highest coefficient of heat transfer between the steam and water. The feed forward design assures soft misty spray and instantaneous temperature control over the full range of steam flow.
Jet Flow steam conditioning valves are available in a variety of combinations. These valves are made as per tailor made requirements of customers. The valves are manufactured in angle, Z and globe forms. Spray water entry is from the top through hollow stem as well as from the bottom, depending upon the process parameters.
Gland seal systems very important to main and auxiliary turbines.Turbine shafts must exit their casings in order to couple up or connect with the unit that the turbines drive (reduction gears, pumps, etc.) The main and auxiliary gland seal systems enable the turbine to be sealed where the shaft exits the casing; in effect keeping "air out and steam in."
The purpose of gland seal system is to prevent the leakage of air from the atmosphere into turbine casings and prevent the escape of steam from turbine casings into the atmosphere.
The gland sealing system provides low pressure steam to the turbine gland in the final sets of labyrinth packing. This assists the labyrinth packing in sealing the turbine to prevent the entrance of air into the turbine, which would reduce or destroy the vacuum in the associated condenser. Excess pressure (excess gland seal) is removed by the gland seal unloader.
Since there are times when steam escapes from the seals, a gland exhaust system is provided. The gland exhaust system consists of low pressure piping connected to the gland area between the last two outer sets of labyrinths which receives and prevents steam from escaping to the atmosphere. This system collects the steam and directs it to a condenser for further use in the steam plant.
Most steam turbines have a shaft sealing system which uses carbon rings to isolate the rotor assemblies on both ends with steam injected to prevent air in-leakage in to the turbine. The leakage would reduce turbine efficiency and flow into the condenser downstream of the turbine further reducing system efficiency. This gland steam must be removed by an ejector or exhaust fan to prevent it from flowing back into the turbine.
Vacuum is necessary during various steps of edible / vegetable oil processing. These steps essentially include hydrogenation, fractionation, bleaching, deodorization and de-acidification. Out of all vacuum equipments, Ejector Vacuum System has established the superiority and versatility of their use as compared to mechanical vacuum pumps. The most outstanding advantage of the Steam Jet Ejector is total absence of moving parts which eliminate mechanical breakdown, and assures constant and dependable operation with freedom from repairs. No adjustment or lubrication is required nor are any specially trained operator necessary as their operation is very simple. Over and above, Steam Jet Vacuum System convey at very high velocity which are many times the speed of sound, they are capable f handling large volume under vacuum thus making them eminently suitable for deodorization application wherein high quality of open / sparging steam has to be handled.
A version of single venturi desuperheater has the same operating conditions. can be mounted easily and quickly in the exisiting pipeline. The unit can be clamped between two flanges. Sizes are between 1 1/2” to 30”
Specification
Material |
---|
A182 GR F11 / F22 / F91 |
A182 GR F11 / F22 / F91 |
A105 |
DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
DIN 1.4122 PLASMA NITRIDED / A 182GR F11 / F22 / F91 ST |
A 182 GR F11 / F22 / F91 |
DIN 1.4122 PLASMA NITRIDED |
DIN 1.4122 PLASMA NITRIDED / INCONNEL 718 |
X120 Cr 29 |
GRAFOIL |
A182 GR F11 / F22 / F91 |
A 182 GR F11 / F22 / F91 |
Turbine bypass valves play a very major role in Power Plant applications. Within a short period of twenty four hours, a power plant may be required to operate at minimum load, increase to maximum capacity for major part of the day, immediately lower back to minimum load and then back to maximum capacity. Bypass System permit unit start up and shutdown in a lifesaving manner for critical heavy components in boiler and turbines. Jet Flow Bypass valves are supplied with hydraulic, electric or pneumatic actuators as per the process requirements alongwith complete control systems as an option.
Functions:
Applications:
There are two different applications:1) Bypass Systems which are occasionally in operation. Among these there are startup and shutdown conditions and emergency conditions, for example after turbine trip.2) Bypass System which are often or permanently in operation, for example for process steam or heating application.
Actuators:
Bypass valves can be supplied with Pneumatic Piston & Cylinder, Electric or Hydraulic Actuators alongwith power pack and complete control system as per the requirements of the system.
Materials:
For most sizes, casting or forgings in Carbon and Alloy Steel can be supplied. For extremely large sizes, units are fabricated. Bypass Valves are normally supplied with butt weld ends. However, if required can be supplied with flanged ends.
Multi-Stage Multi-Path Pressure Reduction via Velocity Control trim technology:
Advantage of Jet Flow Turbine Bypass Valves with Jet Stack Velocity Control trim and laval jet nozzle -
Dump Tubes are an important part of a system discharging in a condenser. These devices are primarily deployed so as to minimize the size of the bypass valve outlet where the specific volume of steam dramatically increases at low or sub-atmospheric pressures.
These dump tubes are normally fitted into the condenser inlet duct and are carefully designed to achieve the final pressure reduction stage and allow the steam to expand and cool prior to entering the turbine exhaust or condenser.
It is recommended to ensure that the Ddump Tube is designed properly with respect to size, shape and profile so as to a void interference with the turbine exhaust steam path under normal turbine operation. The arrangement and the size of the holes in the dump tube are selected so as to minimize noise generation and direct the steam path away from the duct walls and towards the condenser inlet depending upon the installation.
Depending upon the installation, the arrangement of the holes are selected. In case the Dump Tube is installed in the condenser then the arrangement of the holes are drilled in two 90 degree sectors.
This does not allow the steam to go up the turbine exhaust or directly down on to the tubes in the condenser.
In case the dump tube is installed in the turbine exhaust then the holes are drilled around the complete circumference i.e.360 degrees.
Operating philosophy:
Jet Flow Jet Venturi Fume Scrubber is a dependable device designed to entrain and scrub large volumes of gases without the use of complicated baffles or moving Parts.
The motivating fluid, generally water, leaves the nozzled in a hollow cone spray, creating a draft which draws the gases and vapores into the moving stream where they are continuously scrubbed / absorbed while subsequent separation is accomplished in units specifically designed bny, us to meet the state polution control requirement.