Industrial dedusting Systems


A device which separates particles from a gas stream by passing the carrier gas between electrodes across which a unidirectional, high-voltage potential is placed. The particles are charged before passing through the field and migrate to an oppositely charged electrode. These devices are very efficient collectors of small particles.

The ESP is provided with longitudinal bottom hoppers or, if desired, with pyramidal hoppers. For special processes, the precipitator can be supplied with a flat bottom. The hoppers may be provided with heating elements.

Due to the high working temperatures, the precipitator is mounted on a support in a way that ensures minimum forces on the precipitator casing and support during repeated thermal expansions and contractions.

With more than 50 ESP installations in Iran and manufacturing more than 50,000 tonnes, we have the experience to understand your individual process requirements. We will help you to design the most optimal ESP configuration that adheres to stringent emission regulations for your plant.

 Our ESP solutions offer the lowest cost of ownership and have been engineered to deliver   100% efficiency and performance. Our flexible designs offer a host of benefits, including a   minimal equipment footprint, reduced energy consumption, simpler maintenance requirements and lower operating costs.


Bag Filters and Baghouses are used throughout industries in a wide range of applications providing technical and commercially attractive solutions on processes which demand high collection efficiencies with related low dust emissions. We focus on delivering highly dependable fabric filter solutions for all your requirements. Our technology features a sophisticated gas and dust distribution system, perfect bag-to-cage match and on-line maintenance, resulting in the highest particulate removal efficiency at the lowest total cost of ownership. We have developed new filter types that provide reduced equipment weight and footprint and still with the goal of providing the emission reduction capabilities needed. These new filters minimize construction time and shipping cost, which means lower expenses. Our customizable fabric filter solutions offer significantly longer bag life, minimal maintenance and reliable, cost-effective operation that can deliver emissions below 2.5 mg/Nm³ depending on process data.


Some of its features and benefits are:

·        In bag house with high capacity we have our unique gas distribution screens which are applicable for optimized dust and gas distribution and lead to longer bag life and greater overall efficiency.

·        We have designed our advanced control system 

·        With most optimized design of bag filter we use long filter bag technology that leads to enable us for smaller equipment footprint and reduces overall maintenance costs.

·        With the newest cage line manufacture we can design – the star-shaped or round shape cage, start design improves bag lifetime by minimizing wear.

·        Simple Inlet/Outlet duct layout – for ease of installation, maintenance and replacements.

·        We are available 24/7 and our customer can rely on JDEVS air pollution control center


Gas Cooling Tower can be used for any cooling of gases – such as preheater exhaust, cooler excess air and kiln bypass systems and etc– before they are conveyed to mills and filters. The hot exhaust gases enter the top section of the vertical, cylindrically shaped and insulated tower, and are drawn through the cooling tower by a fan. Some of the dust from the gases is precipitated 
and collected in the bottom hopper of the conditioning tower and extracted by a conveyor and the rest of it with lower temperature will  enter  ESP or Baghouse.

JDEVS has resumed in the field of use of GCT before ESP and we are one of the first companies that uses GCT before Bag house in order to reduce temperature 


The basis of the WESP almost same as ESP (Electrostatic precipitator).

 Due to the fact that the function of these filters is absorption of liquids, there are differences in the shape of the electrodes and absorption plates relative to the ordinary ESP and instead of the impactor systems, rinsing systems are used.

 Typically, the material of the body and internal parts are specific according to the application and design.

In these filters, the dust and particles are glued to the adsorbing tube (or plates), discharge electrodes suspended down through each vertical axis of each tube. By applying high-voltage, an electrical field is produced which charges electrically the aerosol and dust particles. Due to this fact they migrate to the collecting electrodes. The particles separated from the gas are removed continuously together with the condensate at the bottom.



In this type of filtration, the air enters the dust in a scrubber compartment and mixed with water in various ways. The dust particles are taken away with water.

The biggest disadvantage of this system is the use of water (due to limited water resources) and corrosion of the system, as well as the efficiency of this type of filter is less than the ESP and Baghouse filter and the advantages of this system are simplicity and low cost equipment.



Hybrid filter can be designed by two methods:

1-Installing a Bag Filter next to the existing Electrostatic Precipitator (ESP):

-         ESP and Bag Filter are separate and both of them are joined together by the duct.

2-Installing a Bag Filter in some compartments of existing ESP.

-          ESP’s compartment and bag filters are in one existing filter casing; with retrofitting some compartment of existing ESP and replacing some compartments of ESP with Bag Filter.

How does it work?

The dust and big particles are collected by ESP and fine particles are eliminated by Bag Filter.

In a hybrid filter, the two methods are used:

1-Dust collecting by electrostatic force in electrical field.

2-Separating particles by cloth in bag filter Compartment .

At the beginning, gas flow is entered to the electrical compartment and under electrostatic field, about 90% to 95% of the dust is collected by collecting plates. The rest particles are entered to the bag filter compartment and settle on the bags. The collected particles make a spongy layer on the bags (dust cake) then with some facility we will collect it in the hopper.

In hybrid filter pressure drop is less than bag filter as a result, energy consumption is less than bag house.

The amount of A/C ratio can be 20% to 30% more than usual bag filter Also bag surface, quantity of cages and solenoid valves will be reduced.

Converting of ESP to Baghouse is such an optimization method for dedusting systems which can be used existing ESP’s compartment and fitted Baghouse to its performed by JDEVS.

As authoritative designer and producer of industrial dedusting systems in Iran , Air pollution Control Center having experts and senior experts does designing, manufacturing and erection of hybrid filter and also converting ESP to the Baghouse or converting ESP to hybrid filter .



Always for transfering of collected dust or material, according to the application and design we need material handeling system.

We can design and manufacture different kinds of material handeling systems such as : Screw conveyers, Drag chain, Rotary Valves, Slide gate and etc.


For the retrofitting the first step is evaluating the existing system to determine if this equipment can reach our aim and then find the right solution for retrofitting or upgrading or even Conversion to other systems.

We can offer our client :
- Conversion of ESP to bag house (upgrade with lower than 20 mg/Nm emission)
- Using powerful software for designing, operation, analysis, simulation and improvement of dedusting systems
- Years of experience in design and manufacturing of dedusting systems (ESP, bag house, GCT)

- In some cases we can use High frequency or 3 phase  T/R for optimize ESP
- Technical consultation of gas cleaning system
- Performance evolution of ESP, GCTs , & bag filters 
- Modernization & upgrading of dedusting equipment 


One of the most important requirement of industries is supply of spare parts of existant equipments that JDEVS can provide them for industries.

For Fabric Filters : Cages, Bags, Solenoid Valves and Control Systems.

For ESPs : Collecting Plates, Discharge Electrodes, Rapping, HV Rectifier Controller, Rotary Valve, Screw Conveyor, Drag Chain and any Insulators required in ESPs.


The most important issues for loading oil and oil products into the marine is safety so with marine loading arm the safest transfer of products from ship to shore, and vice versa, is ensured.

Marine loading arms are built according to the latest standards in loading technology for fluids and gases.

In every situation JDEVS with cooperation with its European partner is capable of creating a solution to suit the customer’s requirements.

JDEVS marine loading arm is the heavy duty model under the marine loading arms with a separate support structure and hydraulic operation. This arm is specially designed for large operating ranges or additional accessories.

Our MLAs can be equipped with three hydraulic driving assemblies for independent movement of the inboard arm, outboard arm and the slewing movement around its vertical axis. The three cylinders are operated by an electro/hydraulic control console with stationary push button panel. A portal remote control system can also be installed permitting the operator to control the arm movements from other points of the jetty or from tanker's deck.

The our model can be equipped with double ball valve or double disk valve/emergency release coupling (DBV/ERC, DDV/ERC) which are automatically actuated when the tanker manifold flange to which the loading arm is connected moves outside the predetermined working and safety envelope.

Our MLAs can also be equipped with QC/DC is easily positioned and hydraulically connected to the ship's manifold in a matter of seconds


- Features and benefits:

·        Nominal bores from DN150-DN400 (6”-24”)

·        Pressure range: 2 - 40 bar

·        Temperature range:   up to + 250°C

·        Balancing: counterweights by means of rigid or cable pantograph

·        Small dead weight

·        Separate support construction in steel

·        Product pipe available in carbon steel, stainless steel, low temperature carbon steel or special alloys

·        Hydraulic operation.

·        Separate ball bearings.

·        High pressure, swivel joints which allow easy exchange of seals without dismantling loading equipment and without auxiliary equipment required.

·        Overall identical diameter.

·        Hydraulic and mechanical locking.

·        Small space requirements.

·        The tonnage of the vessels and variations in water levels to determine the length, which can vary between 10 and 35 m or other length for a custom designed terminal. 


JDEVS will be with you in your difficult situation and we consider JDEVS as your reliable partner in loading arms, some of our highlight features:

·        Highly qualified personnel

·        Higher technical education

·        Workmanship by experience

·        Service (during the production process and after sales)

·        24/24h - 7/7d availability for urgent interventions

·        Maintenance contract for every type and make (also for non-JDEVS loading arms and safety systems).