Walnut Shell Filter for Oil Removal

General
Although filtering is the best way of removing the suspended solids in the water, adopting normal filtering process as to oily sewage, the effect is little. Along with the oil field has more and more high request on the injected water purity, we develop the new generation oil filtering equipment after years’ continuously explore and research. It is HY new generation oil filtering equipment, which is the ideal choice for all oily waste water treatment. And now, HY walnut shell filter is playing large role in oil sewage treatment project in different industries.



HY Walnut Shell Filter

Walnut Shell Filters How it Works
HY walnut shell filter use walnut shells which are specially processed as its filtering media, because walnut shells special advantages as follows:
1. Walnut shells have strong oil adsorption capacity; it can adsorb most of the oil in the oily sewage.
2. Walnut shells can renewable after back washing; so that walnut shell filter media can be used again, saving water treatment costs.
3. Walnut shells have strong pressure resistance; its pressure resistance is 23.4kgf/cm2.
4. The chemical properties of the walnut shells are stable; it is almost not dissolved in acid and alkali solutions.
5. The hardness of walnut shells is high, and its wear resistance is good too; it can be used for long time.
6. Walnut shells have strong adsorption and pollutant catching capacity (adsorption rate 25-53%)
7. Walnut shells are hydrophilic well, but oil immersion resistant.
8. Because the specific gravity of the walnut shell filter media is little bigger than that of water (1.225g/cm3), it is easy for back washing and regeneration.
The excellent feature of HY walnut shell filter is adopting water before filtering to take back washing, no needing with help of air supply or chemicals. The running costs of walnut shell filter is low, and easy management. The back washing strength of walnut shell filter is small, but the effect is good. Because the walnut shell filter media is nonperishable, its service life is long. And according to water quality requirement, the walnut shell filter can work separately or in series.
Walnut Shell Filter Operation

Filtering Media Type		Silica Sand	Walnut Shell
Filtering Effect	Oil Removal Rate (%)	40-50	82-93
	Suspended Solids Removal Rate (%)	50-65	85-96
Filtering Speed (m/h)		8-12	25-30
Backwashing Strength (L/S.m2)		16	6-7
Filtering Media Maintenance Method		Replace for new every 2-3 years	Add 10% every year

How does a Walnut Shell Filter work
Walnut shell filter is one type of separation equipment which adopts filtration separation principle and oil resistance filtering media-walnut shells. It is mainly made up of filtering system, washing system and control system (one is automatic while the other is manual). When filtering, the water sewage flow is from up to down, passing through water distributor, filtering media bedding and water collector, and then one time of filtering finishes. When backwashing, the agitator turns over walnut shell filtering media, the water flow is from down to up, making the walnut shell filtering media be washed and regenerated thoroughly.
Technical Specifications

Model	Treated Capacity (m3/h)	Tank Size (mm)	Filtering Area (m2)	Matched Pump Model	Head (m)	Power (kW)	Agitator (kW)
HY-800	10	800	0.5	IS50-32-200A	35	4	4
HY-1000	20	1000	0.79	IS65-40-200A	38	7.5
HY-1200	30	1200	1.13	IS80-65-160A	25	7.5
HY-1600	50	1600	2.010	IS80-50-200	45	15	5.5
HY-2000	80	2000	3.14	IS100-65-200A	38	18.5	11
HY-2400	110	2400	4.52	IS100-65-200	45	22	20
HY-2600	130	2600	5.306	IS150-125-400A	38	37	22
HY-2800	150	2800	6.154	IS150-125-400A	38	37	30
HY-3000	190	3000	7.065	IS150-125-315	32	30	30

HY800-HY1600 Installation Drawing

Connection Dimensions for HY-800 ~ HY-1600

1	2	3	4	5	6	7
Manhole	Filtering Inlet /Backwashing Outlet	Bleed Line	Sight Glass	Filtering Outlet /Backwashing Inlet	Pressure Gauge after Filtering	Pressure Gauge before Filtering

Ø	Ø1	H	H1	H2	H3	L	b	1	2	6	n
2000	2100	3750	245	150	100	600	32	DN150	DN32	DN150	8
2400	2500	3960	257		130	700		DN200		DN200
2600	2716	4328	344		150	700
2800	2900	4100	270		160	800
3000	3120	4630	350		280	820		DN300		DN300	12

Connection Dimensions for HY-2000 ~ HY-3000

HY2000-HY3000 Installation Drawing

1	2	3	4	5	6	7	8
Filtering Inlet /Backwashing Outlet	Bleed Line	Manhole	Access Hole	Sight Glass	Filtering Outlet /Backwashing Inlet	Pressure Gauge before Filtering	Pressure Gauge after Filtering

Ø	Ø1	H	H1	H2	H3	L	b	1	2	6	n
2000	2100	3750	245	150	100	600	32	DN150	DN32	DN150	8
2400	2500	3960	257		130	700		DN200		DN200
2600	2716	4328	344		150	700
2800	2900	4100	270		160	800
3000	3120	4630	350		280	820		DN300		DN300	12

Walnut Shell Filter in Series

Installation Diagamof Walnut Shell Filter in Series

1	Valve for inlet before filtering
2	Inlet for Pre-filtration tank
3	Valve for backwashing outlet of refined filtration tank
4	Valve for backwashing inlet of pre-filtration tank
5	Vent valve for pre-filtration tank
6	Inlet valve for filtering of refined filtration tank
7	Outlet valve for backwashing of refined filtration tank
8	Inlet valve for backwashing of refined filtration tank
9	Vent valve
10	Outlet valve after filtering
11	Outlet valve for backwashing before pump
12	Exhaust valve

We invite you to contact Flowspec for walnut shell filter media suppliers about the walnut shell filter and walnut shell filter media. We have walnut shells filter and walnut shell filter media your company has been searching for. We will be happy to tell you more about our product lines and to help you determine the quantities you need for your production runs.

Why Walnut Shells Make Oil Drilling More Efficient

Walnut Shell Filter

 Everyday the demand on oil producers around the world continues to increase at exponential rates. The only way to keep up with the demand is to increase production, and that means increasing efficiency so that the trip from the field to the pump doesn't sap a company's profits.
This increased production also means increased waste that needs to be cleaned in accordance with environmental regulations. This is where walnut shells can lend a hand and treat the wastewater that results from oil drilling. This wastewater is filtered through screens containing black walnut shells that remove up to twice as much waste as sand filters.
Furthermore, walnut shell filters can clear three times the amount of waste before they need to be cleaned. This is possible because walnut shells have the ideal surface structure to filter water through, and their resilience to attrition means that they last longer and provide a level of effluency that is unmatched. 
Not only do walnut shells make the clean-up easier, they can also be mixed with mud and utilized to resolve circulation and unplug wells in a manner that won't significantly impact the consistency of drilling fluid.
Finally, walnut shells are an ideal blast media for use in pressure cleaning applications at the drill site. They are coarse, but not so hard that they can damage sensitive structures make of fiberglass, wood, or plastic. Plus, since they are not toxic, there is absolutely no risk of silicosis as there is when using silica based blasting media.
Whether being used to filter waste, speed up production, or clean machinery in between drilling cycles, walnut shells are 100% recyclable which means you can use and reuse them many times over. This allows you to not only reduce operating costs, but it's an easy way to help keep the environment cleaner as well.
Utilizing walnut shells in oil drilling is just one of the many applications Flowspec has been helping our clients with since 1981. We invite you to contact us to learn more about the ways we can help your business incorporate walnut shells into your operations.

Walnut Shell Filtration System

Walnut Shell Filtration System in Oil Field

Why needs the walnut shell filter?

Clean water is important to the oil and gas industry. As oil fields mature, their water cut steadily increases. After the separation process, the liquid will always contain some residue oil. 

Fats, oils and greases content of waste water can cause many problems in both sewers and waste treatment plants. If oil or grease is not removed before discharge of the waste. It can interfere with the biological life in the surface wasters and create unsightly floating matter and films.

The acute effects of oils on birds, fish and microorganism are reasonably well cataloged. The potentially more harmful is the subtle effect on other aquatic life.

The food industry seeks effective technologies to remove fats, oils and greases. Manufactures of oil containing foods face the problem of reducing the oil containment load to downstream waste water systems. 

A large amount of water is used in the refinery processes and a big fraction of it comes out as waste after getting polluted by oil which enters into the wastewater from leaks, spills etc., at various stages.

Walnut Shell Filter Applications

Walnut shell filters are frequently installed for the removal of oil and suspended solids from produced water, refinery effluent and waste / re-circulation streams found at other industrial applications. Walnut shell filtration system is developed as a more suitable method of filtering free oil and suspended solids in applications where sand filters have traditionally been used. Today, walnut shell filter is used to treat oil field produced water, refinery waste water, steel mill direct spray and caster water, ethylene plant quench water, copper concentrate decant and cooling water. 

In water and waste water applications, walnut shell filters are used to remove suspended solids and insoluble hydrocarbons from oily waste water, groundwater, plant process water, cooling water, water recycling & re-use, produced oilfield water and refinery waste water. In metalworking, power generation, municipal, chemical, and petrochemical applications, walnut shell filter treat and remove suspended solids, oily residues, ash, and metallic hydroxides from industrial liquids. Especially suited for filtering water used for oil field flooding, refinery disposal and off shore disposal. Also chemical agents are not needed during filtration.

But they are especially valuable in offshore drilling applications, because they are small and light enough to be installed on a ship due to the reduction in backwash water volume and reduction in weight and footprint. The walnut shell filter will play a big role in helping offshore rigs meet new and more stringent water quality regulations. Best of all, a special backwash cycle can safely remove the contaminants from the walnut shell filter media, allowing the walnuts to be used again and again.

Walnut shell is used for the filtration of water as environmentally safe and effective filtration media. Walnut shell is the best technology for the removal of oil and grease, as well as suspend solids from a variety of heavy oil and other oilfield produced water streams. Walnut shell is chemically inert, hard, resilient and perfect for oily water processing. Suggested mesh sizes are 6/10, 12/20, 35/60, 40/60.

Walnut Shell Working Principle in Filtration

Walnut Shell Filter Operating Principle

The walnut shell filter uses a deep bed of 100 percent walnut shells as the filtration media, which have excellent surface characteristics for coalescing and filtration, plus superior resilience to attrition. This deep bed of 100 percent walnut shells offer superior effluent quality, longer filtration runs, and greater throughput efficiency. The walnut shell filter removes about 98% of oil contaminants and suspended solids from a water stream.

The walnut shell filter uses raw process water and gas or air for back washing, eliminating the need for moving mechanical equipment or external scouring equipment. The walnut shell filter operates at twice the flux rate of conventional sand filters in the same application, and can remove over three times the amount of solids before needing to be cleaned.

Walnut Shell Deep Bed Filtration Media

Walnut Shell Filter Features

Walnut shells have a natural affinity for oil. The same English Black Walnuts that we routinely crack and eat can be ground up and used to safely and efficiently clean up contaminated water streams. 

Walnut shell filters are simple and reliable, compared to many filtration techniques designed to remove oil contaminants and suspended solids from water. There are no chemicals, very few moving parts and the walnut shell filter media can be used over and over again. Walnut shell filters can take water with up to 100 parts per million of contaminants and reduce this level to under 5 parts per million. This is cleaner than normal drinking water.

Couple this with the fact that walnut shell filters can be specifically designed for offshore use to remove more than 98 percent of the contaminants passing through it,

The following is the walnut shell filter advantages:

• Positive media cleanup  
• Elimination of compulsory chemicals  
• No requiring clean water 
• Simple, automatic design  
• Up to the minute, state of the art technology 
• No air or gas scour required 
• Upstream flow is not interrupted 
• High flow rates 

Walnut Shell Filter Backwash

Walnut Shell Filter Operation

During the filtration cycle, dirty process water passes through the walnut shell filter from top to bottom. As the water passes through the walnut shell media, free oil and suspended solids are removed. After 24 hours of filtration, the dirty process water is redirected and pulsed into the bottom of the vessel to fluidize the media bed. In addition, air or process gas is added in a proprietary manner to create an airlift pump.

The airlift pump lifts the contaminated media to the top of the vessel where the turbulence of the backwash water and gas separates oil and suspended solids from the walnut shells. The use of air or gas greatly reduces the amount of backwash water required. The mixture of air or gas and backwash water is separated in an external vessel. One separator vessel can be used for multiple walnut shell filters. Upon completion of the backwash cycle, the flow of dirty process water is again returned to the top of the vessel. It utilizes unfiltered water for media cleanup, eliminating the need for high volumes of clean water.

Since our founding in 1981, for over 30 years, Flowspec Industrial Limited has been an industry leader in manufacturing and distributing the renewable, organic, recycled and sustainable walnut shells. Welcome to visit our website www.walnutshellpowder.com and contact us at flowspec@outlook.com 

Walnut Shell Filter and Applications

Walnut Shell Filter

Walnut shell filter is one type of separation equipment which adopts filtration separation principle. Walnut shell filter adopts the walnut shells as its filtering mediums, because the walnut shells has the features of hydrophilic but not oleophylic, and when the walnut shells are broken up into small sizes, it increases the superficial area of walnut shells greatly, and even more the walnut shells has excellent absorbability, as a result the walnut shells has high oil removal rates. The walnut shell filter has two control ways, automatic and manual. The oily waste water flows into the walnut shell filter from up to down, through water distributor, walnut shell filter material layer and water collector, the filtering finishes. When backwashing or back flushing, the stirrer overturns the walnut shell filter materials, the water flows from down to up, making the walnut shell filter materials be washed fully, and the walnut shell filters materials can be used again. 

Walnut shell filter applications 

1. Oily waste water treatment in oil filed, petrochemical, metallurgy industry

2. Oily waste water treatment in seaport, quay, oil depot

3. Oily waste water treatment in ships or vessels

4. Oily waste water treatment in steel industry, metallurgy industry, coal industry

5. Oily waste water recycling system in steel industry, metallurgy industry, coal industry

6. Water fine filtering in oil field and offshore oil drilling platform

For more information, please visit http://www.walnutshellpowder.com and feel free to contact us at email of flowspec@outlook.com 

What is a Walnut Shell Filter?

Although filtration is the most effective method of removing the suspended matter in the water, but to the water including oil and grease, the normal filtration processing does little. Walnut shell filter is developed especially to treat the waste water including oil and grease.

Walnut shell filter is normally applied to oil field and other oily sewage. Presently, the walnut shell filter is playing a great role in oily waste water treatment in various industries.

Walnut shell filter adopts walnut shell after special processing as filter medium. Walnut shell has strong adsorptive interception capacity (adsorption rate: 25~53%) and stress tolerance (23.4kgf/cm2); walnut shell can be backwashing and regeneration; walnut shell has strong the chemical property of walnut shell is stable not easy to dissolve in the acid solution or alkali solution; the hardness of walnut shell is strong; walnut shell has good abrasion resistance, not needing replacement for long time; walnut shell has good hydrophilicity and oil impregnation. Because the specific gravity of walnut shell (1.255g/cm3) is bigger than that of water, it’s easy for backwashing and regeneration. And even its biggest advantage is adopting the water before filtration directly to back wash, not needing the help of air supply and chemical agents. As a result, the running costs of walnut shell filter is low; the management of walnut shell filter is simple; the backwashing strength of walnut shell filter is small; the filtration effect of walnut shell filter is good; the filter materials of walnut shell filter is not easy becoming putrid for long time; and even more, the walnut shell filter can be used singly or double in series according to water quality requirements.