Ahmedabad, Gujarat, India
Our Products
In a power plant, the primary use of vacuum systems is to remove air and other non-condensable gases from the shell side of the condenser in order to maintain design heat transfer and thus design vacuum. This, in turn, enhances the amount of energy extracted from the steam, exhausted from the steam turbine and increases the plants energy production. Without a vacuum system, air and other non-condensable gases would severely reduce the heat transfer in the condenser, and the plant would require a condenser with significantly more surface area for the same thermal load.
a steam jet thermocompressor is an energy saving device that compresses low pressure steam, often waste steam, to a higher usable pressure. It offers an advantage over mechanical compressors/blowers due to its smaller size while handling a very large vapour volume under vacuum conditions. Due to its size and absence of mechanical parts, it requires a very low capital investment and offers a very long maintenance free service with operational safety.
for a given set of operating conditions, a ratio of entrained suction vapour to motive vapour is determined and the amount of motive steam is calculated. The mass and pressure of the motive steam determines the size of the motive steam nozzle. For applications with varying operating conditions, chem process offers a variable nozzle design, to ensure that efficient performance is maintained over the range of desired operation. To achieve variable performance, a steam regulating spindle is fitted to the nozzle and actuated either manually or automatically.
thermocompressors are finding increased applications in paper, food, pharmaceutical, chemical and other process industries in steam dryers, vacuum dryers, evaporators, deodorizers, etc.
construction
our thermocompressors are simple and consist of three fundamental components: motive steam nozzle, suction body and a diffuser. A wide range of materials of construction are available including stainless steel, carbon steel, chrome molybdenum, titanium, etc. Steam jet thermocompressor designs are available for all national and international design codes such as asme viii div.1, pd 5500, stoomwezen, a.d. Merkblatter, etc. Units can be provided with ce marking wherever required.
key advantages
ring jets also known as steam jet ejector/liquid ring pump combination systems.they are a combination of steam jet ejector system followed by intercondenser and water/liquid ring vacuum pump. This system can achieve vacuum as high as 0.05 torr. Our ring jet systems consist of single or multi-stage ejectors, single or two-stage liquid ring vacuum pumps and intercondenser. It is designed to operate at the same capacities and suction pressures as conventional ejector systems. In special cases, to avoid contamination of seal water, the closed loop for seal water cooling with indirect cooler, gas liquid separator, re-circulation tank and instrumentation is provided. The system can be installed at any elevation and is normally very compact and is easy to install.
our ring jets provide a solution for high vacuum operations. They are versatile in handling both wet and dry loads; they are low level skid mounted packages fully instrumented. They offer clear energy savings and are custom designed.highly energy efficient processing equipment are mandatory for any industry considering the ever increasing utility costs. Our ring jets, installed at low levels, are specially designed to take care of the energy consumption, while pulling high vacuum in various applications, in all processing industries.
we have innovated the most efficient ring jet systems with the best combination of ejectors and vacuum pumps, offering the highest possible thermal efficiencies to the industries. We have also developed ring jets with closed loop seal water re-cycle system for vacuum pumps for the total reduction of effluent.
how it works
the suction of the first stage ejector is connected to the process line to evacuate and entrain gases, vapors or air to maintain the consistent vacuum in the plant during the process. As per the suction pressure requirement the first stage ejector compresses the process vapor to the designed inter-stage pressure which may be selected between 8-14 mbar. The second stage ejector will take over the load from the first stage and further compress the suction gas along with the first stage steam into the surface condenser. The surface condenser is designed to condense the condensable gases and steam from the ejectors to eliminate the load onto the following stage which is the vacuum pump. The non-condensable gases/air along with the condensate produced in the surface condensers are sucked by the water ring vacuum pump. The vacuum pump is designed and selected to operate at optimum inter-stage pressure. The vacuum pump will further compress the non-condensables to the atmospheric discharge. In special cases, to obtain economy for effluent treatment the water ring vacuum pumps are provided with seal water re-circulation arrangement with cooler, gas liquid separator, re-circulation tank with instrumentation.
our ring jet systems comprise of multi-stage ejectors, single & two-stage liquid ring vacuum pumps and condensers, and operate at the same capacities and suction pressures as conventional ejector systems.
key advantages
applications
our ring jets are installed at major chemical, pharmaceutical, food and various processing industries throughout india, where they provide energy efficient and consistent service for a wide variety of processing applications.
all heat exchangers are designed and engineered in accordance with international standards of design and constructions including tema, asme, and hei etc. Thermal design is carried out with the help of customized software, htri and with our expert design engineers to meet custom requirements. Heat exchanger can also be manufactured with asme u stamp certification in special cases.
applications
material of construction
carbon steel, stainless steel 304, 304 l, 316, 316 l, 904 l, cuni 70/30, cuni 90/10, hastelloy c, inconel, nickel, aluminum, monel and titanium
chem process designs and manufactures a comprehensive range of tank jet mixers and complete tank jet mixing systems for the process industries. A tank jet mixer is a mass momentum exchange device that uses pressurized liquid energy to entrain, mix and pump a secondary fluid. It can normally be employed on any application in which the process liquid is capable of being handled by a centrifugal pump.
factors considered in selection include tank volume, viscosity, specific gravity, size and percentage of solids as well as tank geometry. Whether the application is for mixing food products or trade effluent, chem process tank jet mixers offer a simple and reliable method of blending/mixing liquids and keeping solids in suspension.
key advantages
applications
construction
standard materials of construction include stainless and carbon steel, pvcu, pp, ptfe, pvdf, rubber-lined carbon steel, hastelloy and titanium. Other materials are also available. Connections included flanged, screwed or quick release hygienic.
surface condensers prima facie are the generalized terms of a water cooled shell and tube type heat exchangers, that will utilize the heat of a motive liquid or gas to cool the receptive water, or in other words cool the flowing liquid.
disposal of contaminated water is of growing concern in process operations. Where an ejector system is drawing in contaminants, a condenser that discharges directly to the drain may not be used. For such applications, ejectors using surface condensers are used. The surface condenser prevents discharge to the drain and permits recovery or treatment of undesirable wastes.
a steam jet ejector system with surface condensers normally requires more motive steam and condensing water than the one with direct contact condensers, and is the most expensive.
key advantages
steam jet-liquid jet ejector combination systems are ideal to handle small quantities of non-condensable gases and large quantities of condensable vapors on intermittent or batch processes.low level mounted and energy conserving with effectivescrubbing of outlet gases, offers the advantage over othersystems in producing vacuum and simultaneously scrubbingentrained gases before discharging to the atmosphere, making it an ideal selection for contaminated and/orcorrosive applications.they are available in multi-element form as a central vacuumsource on multi-purpose process applications.
they are generally used to create vacuum upto 759 mm of hg in medium size process vessels. The system is more suitable where low capital investment is preferred. It is usually used for batch plant applications requiring coarse vacuum and low level installations.
liquid jet ejectors are specially designed to operate using water, solvent or any other clear liquid and generate vacuum corresponding to the vapor pressure of the liquid. They are very useful for applications when expensive process fluid is to be recovered.they are most suitable for low non-condensable and high condensable loads in applications like distillation and evaporation. External heat exchanger can be provided to maintain liquid temperature in accordance with vacuum requirement. For higher vacuum, liquid jet ejector can be utilized along with a steam jet ejector combination system.the whole system can be supplied as a pre-assembled skid mounted unit for quick installation.
they are available in stainless steel, carbon steel, duplex steel, hastelloy, titanium, rubber lined, pp, ptfe and pvdf.
how it works
liquid jet ejectors are jet pumps, motivated by a high pressure liquid. They use the kinetic energy of the pressure liquid to entrain gases and vapors, slurries and other liquids or granular solids and then discharge the resultant mixture against a counter pressure.
key advantages
Water Jet Eductors
Water Jet Eductors utilize a high pressure fluid to handle a low pressure fluid and discharge the mixture against an intermediate pressure using the Venturi Principle. Ejectors of this type are used throughout industry for pumping and mixing operations.
Steam Jet Syphons
Steam Jet Syphons are similar to the Water Jet Eductors however, they use steam as the motive force to pump, mix liquids and handle solids. In operation, steam under pressure discharges at high velocity through a nozzle and entrains the suction liquid or slurry. Both the Water Jet Eductor and the Steam Jet Syphon can be used for the handling of corrosive or abrasive liquids and solids. Their design simplicity, absence of moving parts, and because they can be made from any machineable material, make them ideal for a multitude of applications.
Solids Handling Eductors
Solids Handling Eductors employ motive air or liquid under pressure through a nozzle in the eductor that produces a high velocity jet to entrain and transport dry solids or slurries. The two types of solids handling eductors are as follows:
Chem Process Systems range of instant Jet Heaters provide a simple, low cost, silent and reliable method of heating liquid inline. Where hygienic steam boilers are applied, we have developed a range of Hygienic Steam Jet Heaters for direct contact heating of liquids for the food and pharmaceutical industries. By bringing the steam into direct contact with the cold liquid both the sensible and latent heat of the steam is fully dissipated within the liquid, making the heaters very efficient. For the food, pharmaceutical and other such industries skid mounted units use hygienic steam in direct contact with the liquid to be heated, for either process or CIP applicants.
The ejector philosophy of creating vacuum is essentially based on the fundamentals of a non moving parts system. Vacuum technologists developed a more sophisticated way of creating vacuum by means of electro-mechanical rotating equipment generalized as Vacuum Pumps. A Liquid Ring Vacuum Pumphas impellers with blades attached to a center hub located in a cylindrical body but offset from the center. Ours is the optimum solution for rough and complex vacuum applications. These simple to operate pumps are perfect for processes that require vacuum upto 720 mmHg.Designed for long-term operation, these pumps are ideal for pharmaceutical, fertilizer, paper, textile, and printing industries.
How it works
The pump requires a liquid (also called the sealant) to create vacuum. Prior to starting the pump, it should be partially filled with the liquid sealant (typically to the center of the body, although this can be plus or minus a couple of inches). The liquid can be water (making it a water ring pump), oil or a solvent, depending upon the application. When the pump is at rest, some of the impeller blades are immersed in the sealant liquid.When the pump starts, the impeller slings the liquid sealant by centrifugal force, forming a ring of liquid at the outside walls of the body. Because the impeller is off-set from the body, some of the blades are fully immersed in liquid, and some are almost out of the liquid. The area of void space without liquid, is sealed off between the liquid (and hence the term sealant) and between the impeller blades, called an impeller cell.
As we follow one impeller cell from the top of the pump, counter-clockwise, you can see the liquid recedes from the center hub, acting as a liquid piston to create a larger cell. This is the suction of the pump, drawing in air, gases, or vapors through the inlet port at the sides of the impeller. After impeller cell passes the inlet port and travels toward the discharge port, the sealant liquid is forced back toward the center hub of the impeller, creating the compression step. As the impeller cell passes the discharge port, the compression is at its highest, and the gases, along with some of the liquid sealant are exhausted through the discharge port to atmosphere. Although the diagrams show a very smooth ring of liquid, in actuality, the liquid sealant is highly turbulent, which is why some of the liquid sealant is discharged with the gases.
Key Advantages
Applications
Our Combination Type Evaporators are a uniquely designed and engineered systems to provide the solution for certain processes where viscosity and chemical property degradation play a vital role. These most economic evaporators utilize falling film tubulars or plates, with either thermal vapor recompression (TVR) or mechanical vapor recompression (MVR). However with many duties, the required concentration of the final product requires a viscosity that is too high for a film evaporator. The solution is to use film evaporation for the pre-concentration and then a forced circulation finisher evaporator to achieve the ultimate concentration; E.g.: a stillage or spent distillery wash evaporator.
The material would typically be concentrated from 4% to 40% in a falling film evaporator and then from 40% to 50% in a forced circulation evaporator. Usually the finisher would be a completely separate evaporator since the finishers duty is usually relatively low. In the duty specified above, almost 98% of the evaporation would take place in the high efficiency film evaporator. For cases where the finishers load is relatively high, it is possible to incorporate the forced circulation finisher as one of the effects in a multi-effect evaporator. However this is an expensive proposition due to the low coefficients at the high concentration.
In Multi-Effect Distillation Evaporators, the upper end of the rising film evaporation tubes protrude from the upper tube plate of the calandria, so that the liquid after evaporation does not flow back into the tube and the vapor produced inside the tubes can leave the tubes without passing the liquid level on the upper tube plate. This avoids the excessive entrainment of the liquid and higher vapor and distillate salinity.
Chem Process Multi-Effect Distillation Evaporators have removable covers for easy accessibility to the demister pads. On the condensation side, the heating elements are designed with special internal air cooling zones which ensure optimum concentration of the non-condensable gases which are evacuated by the ejector.
Due to its inherent design features, it is ideal for thermal treatment of solutions and heat sensitive products, where reduced operating temperatures and vacuum operating pressures are desirable. The typical Agitated Thin Film Evaporator consists of a tubular heat transfer area with an external heating jacket and a fast-revolving, inner rotor with flexible or rigid wiper elements. The driving speed is adapted to the product being handled, its particular specifications and task.
The feed product is evenly distributed by the rotor and its wipers over the heating surface, forming a thin liquid film of uniform thickness. Highly turbulent swirls are produced at the tip of the rotor blades and wipers with intensive mixing and agitation of the product, as it comes into contact with the heating surface. This assures excellent heat transfer combined with constant renewal of the product film and provides an even heating and short residence time of the product through the heated zone.
Key Advantages
Applications
Mainly used for difficult vaporization and heat exchange processes, especially where products to be handled are highly viscous and conventional plants can no longer meet user demands because heat transfer is insufficient. Due to the liquid film, mechanically generated on the heating surfaces, thin film equipment achieve much better heat transfer rates, even with highly viscous products containing solids.
(Manufactured under license from National Dairy Development Board, NDDB, Anand)
Chem Process has specially developed the Milk Condensing Systems based on the Steam Heated Rising Film Evaporator with Thermal Vapour Compression.
The evaporation process is a commonly used method of concentrating milk. Different types of evaporators with various capacities are available in the market namely Steam Heated Falling Film Evaporators with Single Effect to Multi Effect and various other types.
NDDB however wanted to develop energy efficient, economical and cost-effective Milk Condensing Units for small and medium scale operations. After strict deliberations, Chem Process was awarded this job which has been successfully implemented by us year after year.
Khoa Cooling Equipments
(Manufactured under license from National Dairy Development Board, NDDB, Anand)
Chem Process designs and manufactures Khoa & Food Product Cooling Systems. Product Cooling under Vacuum is very rapid and this method not only improves the quality and freshness of the product but also increases the shelf life and reduces the production time drastically.
Khoa when produced has a temperature of 90C. Previously, the method used was to bring the temperature from 90C to 40C by atmospheric cooling and the time taken was about 5 hours. Then the Khoa was put in a Cold Storage, where it would take about an hour for the temperature to come down to 25C. Since the Khoa remained at an elevated temperature for a long time, browning occurred and the colour instead of being a pure white would be yellow in colour.
Chem Process applied Vacuum Cooling method for the cooling of Khoa for the National Dairy Development Board, NDDB, Anand. The advantages achieved were that the time was drastically reduced from 6 hours to 15 minutes, the Khoa is white in colour and the shelf life which was earlier restricted to 4-5 days has now increased to 20-25 days.
We specially designed the Steam Jet Vacuum Systems with a Surface Condenser and a Water Ring Vacuum Pump, so as to avoid barometric height and minimized the quantity of steam required to get a superior product quality.
Our Khoa Cooling Systems have been in continuous use for over 3 years without any breakdown.
Chem Process Systems offers high quality Feed water Heaters to meet the clients requirements in the power generation, chemical, petrochemical and marine engineering industries. We design and manufacture both low pressure and high pressure Feed water Heaters which may be installed either vertically or horizontally, depending on the plant design requirements. Conservatively designed tube bundles and proven venting concepts provide permanent protection against damage and guarantee optimal heat transfer. We offer the complete range of Feed water Heaters for nuclear and large scale conventional power plants, such as:
Features & Highlights
Industrial Application
Design
The design parameters of the Feed water Heaters are determined by the economics of design and plant requirements. Each Feed water Heater will contain one to three separate heat transfer areas or zones including the condensing, desuperheating and subcooling zones. The tube material, tube diameter and water velocity are selected based on the calculation of operational economy and safety.
Design Features
