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.

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.