THE LOW COST, SIMPLE SOLUTION FOR NEAR DUST-FREE LOADING
THE DSH STORY
It all began with a question.
DSH hopper systems are the invention of Trevor Schwass, who hails from the sunny Hawkes Bay region on the east coast of New Zealand Trevor was working as a mechanical site engineer at Ravensdown fertiliser plant in Napier when he first developed the DSH System The site was suffering from huge amounts of dust that was being created during loading, dust that engulfed the yard and made machinery and workers almost invisible in the murk With worker health and air pollution at the forefront of his mind, Trevor used his expertise to set about solving the dust problem that has plagued the bulk handling industry for years
In 2004, after several years of designing, tinkering and fine-tuning, our award winning dust suppression hopper was born Trevor managed to create a simple, autonomous systems that required minimal utilities, maintenance or expertise to install, and the "magic bucket" has been clearing the air ever since.
Making a difference
After that first installation in New Zealand, thousands of DSH systems have since been installed across the globe With our hand picked and trusted worldwide distribution network, our systems have been fitted everywhere from ports in Japan to quarries in France, and everywhere in between
With every hopper installed, DSH contributes both to better worker health as well as environmental protection, all whilst ensuring a clean and efficient loading method. By limiting dust generation, a DSH hopper minimises the amount of fugitive particles escaping into the air, preventing the pollution of our precious oceans, waterways and other areas, and minimising health hazards for both humans and animals associated with the inhalation of dust.
At DSH, we strive to offer exceptional products and service, all whilst being proudly kiwi owned and operated. Become a part of our network and see the DSH difference!
HOW IT WORKS
TheDSHhopperis installedunderaninfeed point,whereitis suspendedinafixed locationabovetheloading area.
TheDSHexpelsairand formsanannularflowthat isthencompressedradially intoasolidcolumnasit exitsthehopper.
As the hopper fills, the product level rises, and the springs extend, progressively opening the flow control gap and balancing the product flowing in and out of the hopper. Thesoliddischarge columnfallsthrough theairvirtuallydust freeformanymetres, beforedrivinginto thepileformedon thefloororina receivingvessel, resultinginminimal dustreleaseand productloss
DSH DIFFERENCE
Protect the Environment
DSH helps take care of the environment by reducing the amount of harmful dust that can escape into the air and beyond With our systems, dust is prevented from escaping during loading or transferal, which improves both air quality and visibility on worksites as well as in surrounding areas.
Lower Maintenance & Servicing
With no internal moving parts and only needing a simple set of springs in order to function, our systems also require no electricity, hydraulics, or pneumatics, meaning there is less ongoing maintenance needed, and any servicing that is due is a simple and quick task
Less Health & Safety Issues
By reducing the amount of fugitive dust in the workplace, our systems create a healthier, safer environment for workers and ensures that health and safety protocols and regulations regarding the production of, and exposure to, dust is below specified levels
Preserve your Product
Reduced Waste & Cleaning
Our systems keep dust particles condensed within the material itself which prevents fugitive dust from escaping when transferring products This means less product is lost during loading, and reduces waste, contamination, and housekeeping associated with dust.
Our systems help keep product safe by protecting the integrity of blends and mixes in products such as fertiliser, as well as preventing damage to delicate items such as wood pellets, all whilst ensuring that all of the product gets loaded
DSH DIFFERENCE
DUST SYSTEMS COMPARISON
Autonomous
The DSH requires no personnel input during loading as it works completely autonomously using its springs system
No Utilities Required
Standard DSH models require no Electricity, Pneumatics or Hydraulics in order to function
No Additional Dust Disposal Needed
The DSH contains dust in the product stream, eliminating the need for collection and disposal
Reduces Cleaning
The DSH minimises and suppresses dust, meaning that yards, trucks, cars ond building in nearby areas stay clean
Reduces Maintenance
Operating on only a simple set of springs, there are minimal parts requiring attention or replacement
Reduces Site Hazards
The DSH reduces hazards to worker and environmental health, while aiding in meeting operational health and Safety initiatives
Reduces Explosion Risk
As the DSH requires no electricity and prevents dust, there is less risk of build of of potentially combustable dust particles
Preserves your Products
The DSH protects blends/mixes and delicate products It ensures that all of the product is loaded, thereby increasing returns
Low Cost
Compared to other systems, the DSH is a low cost solution to the huge issue of fugitive dust
DSH Systems Cascades & Chutes Collection & Extraction Free Falling
DSH APPLICATIONS
DSH systems require no services (electricity, pneumatics, or hydraulics) to function and most cases, are able to be easily integrated into existing loading facilities with minimal downtime to schedules Where site specific engineering is required, we will work alongside you to develop a unique solution to ensure the system is installed correctly and performs to your expectations
Port Loading
The DSH can be used for sea or inland port loading of open bulk carrier ships and barges
Due to the condensed column stream produced, the product can also fall with minimal dust even when exposed to sea breezes By eliminating fugitive dust, we help protect our valuable oceans and waterways from foreign matter
Rail Loading
The DSH can be used for open, closed and center slotted rail car loading
Minimising dust helps keep lines and yards clear, whilst also keeping the exterior of cars cleaner With a high mounting point and no need for telescopic equipment/ loading railcars evenly is seamless and uncomplicated
Vehicle Loading
The DSH can be used for open and closed truck and trailer loading. With reduced dust comes cleaner vehicles and yards, which also prevents dust movement outside when the trucks leave the yard.
Container Loading
The DSH can be used for container, bag or drum filling. By minimising air and compacting the product, you maximise capacity when filling, and remove the need for time spent settling the product.
Bulk Store and Open Stack Loading
The DSH can be used for warehouse store and open stacking/stockpile loading. With less fugitive dust floating around, both air quality and visibility are improved, and warehouses or yards are kept free of dust or debris
DSH Systems can be installed to support the following loading types: Ship Loading, Belt, Screw and Aeration Conveyors, Hopper and Silos.
DSH can be used with the following feed controls: Clam Shell Gates, Slide Gates, Rotary Valves.
DSH MATERIALS
DSH hoppers are specifically developed to reduce and control dust when bulk loading dry, granular freeflowing products We regularly test materials for suitability and effectiveness with our systems If your product is not listed below, please get in touch, we are always happy to test new products
Grains & Foods
Barley (Feed, Malt, Pellets)
Bran (Pellets)
Broll (Milling)
Canola (Meal)
Corn (Crushed, Gluten, Gluten
Feed, Gluten Meal, Meal, Meal Pellets, Crushed Cobs, Germ)
Cotton Seed (De-linted)
Dried Distillers Grain (DDG)
Feed (Ground, Pellets, Feed Phosphate)
Germen Malta
Grains
Maize (Maize Gluten)
Meal - Pellets
Rape Seed (Rapeseed Meal)
Rice (Hulls)
Salt (Table)
Soya (Beans, Hulls)
Soyabean (Bean, Meal, Pellets)
Stock Food
Sugar (Pellets, Raw, Refined)
Sunflower (Pellets)
Tea Wheat
Fertilisers
Bauxite
Blue T Super
Bourucca rock
Charcoal (Granulated)
DAP
Dicalcium Phosphate
Dolomite (Crushed)
Dolomite Lime
Feldspar
Fertilisers
Kieserite
Lime (Granular, Powder)
MAP
Minerals & Quarry
Gravel
Kaolin
Limestone (Sand)
Magnesite
Marble Powder
Olivine
Salt (Coarse, De-icing)
Sands (Various)
Silica Sand
Wood (Pellets)
Poshphate (Rock)
Potash
Potassium Sulphate
Revel A
RPR Fertiliser
Soda Ash
Sodium Sulphite
Sulphur
Superphosphates
Togo Rock
Turkish Soda
Urea
DSH PRODUCTS
STANDARD HOPPERS
Our team will work with you to determine the best hopper system for your requirements, based on the product type, bulk density and flow rate required.
TARDIS HOPPERS
Our DSH TARDIS hopper is a large, flanged mounted enclosed system specifically designed for ship loading or other outdoor applications This design protects products from the elements and makes for easier installation, maneuverability and loading.
OPTIONAL ADDITIONS AND PARTS
Our systems are able to fully customized to meet your needs Whether the hopper is required to fit into a tight or unusual shaped space, there are access restrictions, or your products are corrosive or fine and extremely dusty, we have a solution - and if we don’t, we will find one!
VARIOUS SIZES
We offer DSH Systems in many sizes, from a Mini up to a 9, each with various capacities ranging from 50 tph up to more than 2000 tph. Each model is specifically rated in processing tonnes per depending on the product type, bulk density and flowrate
We offer additional hopper components and parts as required. Optional additions include dust filter covers, ceramic linings and static electricity earth straps We can also supply spare parts for all hoppers and components
DSH CONSTRUCTION
DSH hoppers can be constructed from various materials Depending on your product type, bulk density and desired flow rates, our team will determine the appropriate construction material and size, as well as any specialized recommendations that may be required
Polyethylene rotational moulded hoppers cover most general applications and can be used with some corrosive products Polyethylene is resistant to fading and chipping, and this method of production means our poly hoppers are formed in one piece and the finished product is extremely strong, long lasting, and durable.
CORTEN STEEL
Corten Steel is long-lasting and can be used with abrasive or warm products It has high durability, is relatively light weight, has corrosive resistance and is very strong Our hoppers are powder coated to increase durability in harsh environments and to reduce chipping, fading, scratching and wearing Corten Steel can also be electro galvanized for added protection against corrosive products.
POLYETHYLENE HARDOX STEEL
Hardox Steel is long-lasting and can be used with abrasive or warm products It has high durability, is relatively light weight, has corrosive resistance and is very strong. Our hoppers are powder coated to increase durability in harsh environments and to reduce chipping, fading, scratching and wearing Hardox Steel can also be electro galvanized for added protection against corrosive products
STAINLESS STEEL
Stainless Steel has high resistance to corrosion. We offer both 304 and 316 Stainless Steel Hoppers 304 Stainless Steel is suitable for warm or abrasive products, where as 316 Stainless Steel is suitable for food grade situations
ENQUIRE
DSH PROCESS
Our team will ask you to provide a number of key numbers and specifications, and will then work with you to determine the best DSH for you, based on your product type, bulk density and the flow rate you require
PRODUCTION
Each hopper system is custom made to suit your application We use only the highest quality materials and components to build our systems and have a rigorous quality control process at each step in production
INSTALL
Once the hopper system has arrived, it is time for installation. Carefully follow the installation manual provided with your system to ensure that it functions properly We provide full remote support for all DSH clients
ORDER
Once we confirm your specifications, our experienced team will work with you to ensure the design, material and features are suitable for your application, as well as deciding on any additions or alterations that may be required to suit your installation site.
DELIVERY
Each hopper and all parts required for assembly are hand packed into an Heat Treated ISPM-15 Timber Export Crate
Depending on your needs, DSH can arrange delivery via air or sea freight to the final destination.
DSH RESULTS
The DSH was easy to integrate and install on site and resulted in an immediate reduction in fugitive dust emissions whilst maintaining or increasing loading rates
DSH Mini - Total dust concentration went from 164.7 mg/m3 to 13.7mg/m3 - a 91% reduction!
DSH 7 Corten Steel hopper loading Limestone Sand at 950tph into a truck
DSH TESTIMONIAL
“The hoppers have been a great success in cutting down the dust problem and make visibility a lot easier and provide a
perfect pour when loading.
Not only are we happy, but truck drivers and transport companies are thrilled as there’s less debris over their trucks"
Hugh Eaglesome, Lower North Island Project
Manager, Ravensdown
RAVENSDOWN, NEW ZEALAND
CREATING THE PERFECT POUR
THE PROBLEM:
Fertiliser dust from bulk loading general stores created a low-visibility, messy work environment, which was the perfect recipe for an accident People, trucks and front-end loaders were struggling to work and meet targets in a dirty, low-visibility situation and desperately needed a dust control system that transferred bulk fertiliser without interrupting schedules or reducing outputs.
THE SOLUTION:
Initially installing a single DSH System, the hopper was so effective, that DSH hoppers have since been installed in 40 stores throughout New Zealand! With continuous loading, the hoppers limit dust fallout and improve visibility, allowing for fast transfer of fertiliser through the air in a perfect pour
The system makes a difference to the bottom line too The loading plant doesn’t need dust extraction and there’s minimal or no product loss during transfer, reducing waste and the need for dust collection systems and cleaning services.
DSH TESTIMONIAL
“This project exemplifies sustainability by delivering sound environmental and economic outcomes through the introduction of innovative ideas.”
Grant W Allen, Technical Manager,
Impact Fertilisers
IMPACT FERTILISERS, AUSTRALIA
FUGITIVE DUST CONTROL: TINY PARTICLES, BIG PROBLEM
THE PROBLEM:
What do you get when you need to load 320,000 tonnes of single superphosphate for bulk shipment and transportation by truck and container? Dust! This was the problem facing Impact Fertilisers in Australia With fugitive dust escaping into the air and causing environmental and occupational health and safety problems, Impact Fertilisers also started to receive complaints from the wider community about the fugitive dust generated by their loading processes Those tiny dust particles were adding up to a big problem which didn’t seem solvable without slowing load rates.
THE SOLUTION:
A DSH System was easy to integrate and install onto site, resulting in an immediate reduction in fugitive dust emissions whilst maintaining or increasing loading rates! It was so effective, DSH Hoppers have been installed at 12 additional Impact Fertilisers sites around Australia and their use is now standard practice As well as being good for the bottom line, Impact Fertilisers have a better working environment and fewer environmental complaints
