Pune, Maharashtra, India
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Removal of gaseous pollutants by:
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In a Reverse-air bag-house, the bags are fastened onto a cell plate at the bottom of the baghouse and suspended from an adjustable hanger frame at the top. Dirty gas flow normally enters the baghouse and passes through the bag from the inside, and the dust collects on the inside of the bags.
Reverse-air baghouse are compartmentalized to allow continuous operation. Before a cleaning cycle begins, filtration is stopped in the compartment to be cleaned. Bags are cleaned by injecting clean air into the dust collector in a reverse direction, which pressurizes the compartment. The pressure makes the bags collapse partially, causing the dust cake to crack and fall into the hopper below. At the end of the cleaning cycle, reverse airflow is discontinued, and the compartment returns to the main stream.
The flow of the dirty gas helps maintain the shape of the bag. However, to prevent total collapse and fabric chafing during the cleaning cycle, rigid rings are sewn into the bags at intervals.
Reverse Air-Baghouse system is used where the volumes of the gas handled are huge.
ECOMAK have provided Reverse Air Baghouse since inception in 1993. The first ever project in company's history was for a Reverse Air Baghouse catering to 1, 00, 000 Am3/hr capacity. ECOMAK can provide Reverse Air Baghouse upto 30, 00, 000 Am3/hr.
In a Reverse Pulse Jet baghouse or simple known as pulse jet baghouse, bags are supported by a metal cage, which is fastened onto a laser cut tubesheet plate at the top of the baghouse. Dirty gas enters from the bottom of the baghouse and flows from outside to inside the bags. The metal cage prevents collapse of the bag. This filters the dirty gas which captures the dusty gas particles on the outer surface of the bags.
Bags are cleaned by a short burst of compressed air injected through a common air manifold over a row of bags. The compressed air is accelerated by a venturi nozzle mounted at the reverse-jet baghouse top of the bag. Since the duration of the compressed-air burst is short (generally, less than 0.1seconds), it acts as a rapidly moving air bubble, traveling through the entire length of the bag and causing the bag surfaces to flex. This flexing of the bags breaks the dust cake, and the dislodged dust falls into a collection hopper below.
Pulse Reverse-jet dust collectors can be operated continuously and cleaned without interruption of flow because the burst of compressed air is very small compared with the total volume of dusty air through the collector. The short cleaning cycle of reverse-jet collectors reduces recirculation and redeposit of dust. This cleaning system works with the help of sequential timer or PLC based panel attached to the fabric filter. This timer indicates the solenoid valve to inject air to the blow pipe.
Online baghouse systems are used in applications such as- Industrial Boiler Exhaust flue gas, material handling systems, capturing nuisance dust in plants amongst a few of the many applications.
ECOMAK have supplied online pulse-jet baghouses with volumes ranging upto 1, 00, 000 Am3/hr and more for a wide variety of applications ranging from milk powder to uranium ore.
In an offline pulse jet baghouse, the construction and working is similar as the online baghouse. The offline Pulse jet Baghouse consists of a number of modules/chambers. Each module is isolated from gas stream by closing its outlet poppet damper in predetermined sequence. In an isolated module, each of filter bag rows is cleaned sequentially by compressed air pulses. The mass of air also draws air behind it, adding to the downward airflow.
The dust removed falls into the hoppers and is discharged through discharge valve. A master controller - which can be PLC (Programmable logic Controller) based dictates the sequence of the chambers that should be go in "Offline Mode."
Offline baghouse systems are generally suitable for large volumes or applications which have light dust. These baghouse systems are robust and sturdy. One of the main advantages of the offline baghouse system is that the maintenance of the system can be done by "switching off" one module till the time the maintenance activity is complete.
Offline baghouse systems are used in steel, cement and power applications where the gas volumes are huge.
ECOMAK Offline pulse-jet baghouse technology caters to various sectors of the industry. Offline Pulse-jet baghouse is used for PRIMARY and SECONDARY Ventilation applications.
Electro-Static Precipitators or commonly known as ESPs continue to be excellent devices for control of many industrial particulate emissions, including smoke from electricity-generating utilities, products collection such as cement in cement plants, sinter fine collection in Iron & Steel industries to name a few.
The original parallel plateweighted wire design has evolved as more efficient and robust discharge electrode designs subsequently transformed into a more efficient and robust discharge electrode design of pipe and spike discharge electrode, maximizing corona production.
Transformer-rectifier systems apply voltages at a defined peak. Modern controls, such as an automatic voltage control minimize electric sparking and prevent arcing (sparks are quenched within 1/2 cycle of the TR set), avoiding damage to the components. Automatic plate-rapping systems and hopper-evacuation systems remove the collected particulate matter on line, theoretically allowing ESPs to stay in continuous operation till annual shutdown.
ECOMAK is capable for delivering Electrostatic Precipitators having gas flow upto 25, 00, 000 Am3/hr with round the clock emission level kept in check upto 30 mgm/Nm3. ECOMAK also provides engineering support and operator training to any project undertaken.
Other Electrostatic Precipitator offerings by ECOMAK are:
A) Retrofitting of Electrostatic precipitator.
B) Conversions:
C) Services:
A venturi scrubber is designed to effectively use the energy from the inlet gas stream to atomize the liquid being used to scrub the gas stream. A venturi scrubber consists of three sections: a converging section, a throat section, and a diverging section. The inlet gas stream enters the converging section and, as the area decreases, gas velocity increases. Liquid is introduced either at the throat or at the entrance to the converging section.
The inlet gas, forced to move at extremely high velocities in the small throat section, shears the liquid from its walls, producing an enormous number of very tiny droplets. Particle and gas removal occur in the throat section as the inlet gas stream mixes with the fog of tiny liquid droplets. The inlet stream then exits through the diverging section, where it is forced to slow down.
Venturi Scrubbers can be used to collect both particulate and gaseous pollutants. ECOMAK is capable to provide Venturi Ecoscrubbers upto 3, 00, 000 Am3/hr.
Screw Conveyors consist of a trough or tube containing either a spiral blade coiled around a shaft, driven at one end and held at the other. The rate of volume transfer is proportional to the rotation rate of the shaft. In industrial control applications the device is often used as a variable rate feeder by varying the rotation rate of the shaft to deliver a measured rate or quantity of material into a process. Screw conveyors can be operated with the flow of material inclined upward. This is a very economical method of elevating and conveying used by industry.
A pugmill or pug mill is a machine in which clay or other materials are mixed into a plastic state or a similar machine for the trituration of ore. A pugmill may be a fast continuous mixer. A continuous pugmill can achieve a thoroughly mixed, homogeneous mixture in a few seconds. Mixing materials at optimum moisture content requires the forced mixing action of the pugmill paddles, while soupy materials might be mixed in a drum mixer. A typical pugmill consists of a horizontal boxlike chamber with a top inlet and a bottom discharge at the other end, 2 shafts with opposing paddles, and a drive assembly. Some of the factors affecting mixing and residence time are the number and the size of the paddles, paddle swing arc, overlap of left and right swing arc, size of mixing chamber, length of pugmill floor, and material being mixed.
Cyclonic separation is a method of removing particulates from an air, gas or liquid stream, without the use of filters, through vortex separation. Rotational effects and gravity are used to separate mixtures of solids and fluids. The method can also be used to separate fine droplets of liquid from a gaseous stream.
A high speed rotating air flow is established within a cylindrical or conical container called a cyclone. Air flows in a helical pattern, beginning at the top (wide end) of the cyclone and ending at the bottom (narrow) end before exiting the cyclone in a straight stream through the center of the cyclone and out the top.
Larger (denser) particles in the rotating stream have too much inertia to follow the tight curve of the stream, and strike the outside wall, then falling to the bottom of the cyclone where they can be removed. In a conical system, as the rotating flow moves towards the narrow end of the cyclone, the rotational radius of the stream is reduced, thus separating smaller and smaller particles.
The cyclone geometry, together with flow rate, defines the cut point of the cyclone. This is the size of particle that will be removed from the stream with 50% efficiency. Particles larger than the cut point will be removed with a greater efficiency and smaller particles with a lower efficiency.
MULTI-CYCLONESMulti-Cyclones consist of two or more set of cyclones. This set of cyclones is placed in one gas stream to obtain higher cleaning efficiency than that of single cyclone. The gas stream is divided into two separate streams of gas and the combined in one single stream at the outlet. Multi-cyclones are preferred over single cyclones where higher efficiency is required.
As we are proposing a common bagfilter and fan for two melting systems with different volumes, temperatures and pressure drops (due to difference in the equipment in each system) the air will tend to pass through the system which offers lesser resistance. To balance the drafts ensuring adequate flow and fumes as per predetermined quantities a damper will be provided which will regulate the pressure across the two systems balancing these to designed volumes and pressure.
A bypass damper is provided to safe guard the fabric media before the bag house if the temperature rises beyond design limit. This damper will be normally closed during normal operation. However it will be open at predetermined set point from the temperature detector located before the bag house. This will bypass the fumes/gas from the baghouse to the fan which will result in safeguarding the baghouse.
ECOMAK offers 3-way dampers, Lourve-dampers, guillotine dampers and V-I-V Dampers for the applications stated above.
A forced draught cooler has a mechanical draft tower with a blower type fan at the intake. The fan forces air into the tubes of the cooler, creating high entering and low exiting air velocities. The low exiting velocity is much more susceptible to recirculation. The benefit of the forced draft design is its ability to work with high static pressure. Such setups can be installed in more-confined spaces and even in some indoor situations.
A water pre-heater absorbs the flue gas heat into water thus, utilizing the heat from the exhaust gas which would otherwise be wasted. Plant efficiency is therefore further increased when viewed with respect to actual energy content of the fuel.
Many decades of experience in dust extraction and flue gas exhaust cleaning has resulted into successful installation for flue gas cleaning in many projects.In the field of flue gas cleaning for demanding biomass fuels, we are catering to all new upcoming combinations of green fuel.ECOMAK is geared up to meet increasingly stringent environmental requirements and the levels are well below the limits.
ECOMAK offers flue gas cleaning systems for boilers fired by:
Power Saved Is Power Earned."
ECOMAK is a pioneer in heat recovery systems. In order to have big savings in fueland save major investment costs for heat generation, boiler output gas is used to recover heat. Due to this, fuel requirement reduces drastically. The heat recovered from the flue gas can be used for other applications in the plant, where heating is required.
Products offered by ECOMAK for Heat recovery:
Thanks to several years of experience in plant manufacturing ECOMAK is thorough with cement manufacturing and the processes involved in it inside out, offering reliable and efficient dedusting plants for the entire cement manufacturing process, from the stone quarry to the cement packing site.
Our expertise and full range of services really come to the fore-front in cases where modernization or upgrading equipment is required. Thanks to our centralized project planning and management concept, as well as our assembly expertise, electrostatic precipitator conversions or replacement investments only requires minimum production downtime to be completed.
ECOMAK offers Air pollution control solution to following sections in a cement Plant:
ECOMAK offers a wide range of products for Fume/Gas cooling systems, PRIMARY fume extraction system and SECONDARY Fume Extraction System in the following areas for Iron & Steel Industry:
Spark arrester is used generally in the system where sparks are likely to generate and which can pose threat to filter bag media. The spark gets impinged inside the spark arrestor and looses momentum and heat. They fall by gravity in the hopper and get extinguished.
A safety dilution damper is provided to safe guard the fabric media before the bag house for temperature rise. This damper will be normally closed during normal operation. However it will be open at predetermined set point from the temperature detector located before the bag house. Fresh air will be introduced from the atmosphere and keep the temperature of gases well below the limit. Once the designed system temperature is attained, again at predetermined set point the damper will be closed automatically.
The basic use of the rotary airlock feeder is as an airlock transition point, sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure and suitable for air lock applications ranging from gravity discharge of filters, rotary valves, cyclone dust collectors, and rotary airlock storage devices to precision feeders for dilute phase and continuous dense phase pneumatic convey systems
Double dump valves have two trap-door flap plates which open and close on an alternating cycle. The top gate opens to allow collected material to drop through onto the bottom gate. The top gate then re-closes to prevent air leakage above the valve. The bottom gate then opens to allow material to pass completely through the valve. The bottom gate then re-closes to prevent air leakage below the valve. This cycle is continuously repeated in order to maintain a steady discharge of material from the valve, while maintaining a positive seal on the system.
We are engaged in manufacturing and supplying best quality of Water Cooled equipment. Water Cooled Equipment is extensively used for high temperature applications in Steel and Cement Sectors. Moreover, ECOMAK strives hard to meet the huge market demands and goal of the company in the given time frame.
Water Cooled Equipment manufactured by ECOMAK:
ECOMAK provide state-of-the art Fume capturing equipment in the Metals Industries. Fume capturing equipment are provided for furnaces namely Induction Furnace, LRF and EAFs.
Types of Hoods:
ECOMAK is equipped to supply all spare partsfor the components used in our products/system/plants. We guarantee the long-term availability of these spare parts.
As a result, equipment spares can be delivered as quickly as possible, ensuring the production processes aren't interrupted. ECOMAK are adept provide spares for all of their product range with special focus on items which are long term replaceable items such as filter bags, cages, rotary-air lock valves, emitting electrodes and insulators, among many other items.
