{"id":702,"date":"2025-02-25T09:41:18","date_gmt":"2025-02-25T09:41:18","guid":{"rendered":"https:\/\/lowayequipment.com\/?page_id=702"},"modified":"2026-10-20T08:32:52","modified_gmt":"2026-10-20T08:32:52","slug":"petroleum-industry","status":"publish","type":"page","link":"https:\/\/lowayequipment.com\/ko\/industry-applications\/petroleum-industry\/","title":{"rendered":"Petroleum Industry"},"content":{"rendered":"\t\t
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\n \"Petrochemical\n
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Industry Applications · Petroleum<\/p>\n

Oil Sludge Dewatering for Refineries, Tank Farms and Drilling Operations<\/h1>\n

Transport and disposal are billed on the tonne, and on an oily sludge job most of that tonnage is water. Oil sludge dewatering takes that water out where the sludge is, so the cake is lighter to haul and the filtrate goes back into the plant instead of into a tanker. Which press, and how it is built, comes out of the sludge itself — its oil content, how stable the emulsion is, how fine the solids are. Send us those numbers and we come back with a machine and the test data behind it.<\/p>\n

\n Send us your sludge data<\/a>\n See which press fits<\/a>\n <\/div>\n <\/div>\n
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01<\/span>Tank bottom sludge<\/div>\n
02<\/span>Refinery wastewater sludge<\/div>\n
03<\/span>Drill cuttings<\/div>\n
04<\/span>Mixed pit sludge<\/div>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The sludge<\/p>\n

Four oily sludges, four different jobs for the press<\/h2>\n
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One site rarely produces one sludge, and each one asks something different of the machine: a different cloth, a different filling time, a different conditioning dose. Sizing oil sludge dewatering on the wrong stream is where a project goes wrong, and it shows up inside the first week.<\/p>\n

\n \"Filter\n
Filter press built for oil sludge duty<\/figcaption>\n <\/figure>\n <\/div>\n
\n
\n A<\/span>\n

Tank bottom sludge<\/h3>\n

This settles under crude and product tanks, and it is heavy: sand, rust, wax and asphaltenes in a semi-solid that does not pump easily. It gets diluted, heated and screened before the press sees it, which also takes the free oil out ahead of the machine. What arrives afterwards takes to oil sludge dewatering well, because the worst of the oil has already gone.<\/p>\n <\/div>\n

\n B<\/span>\n

Refinery wastewater sludge<\/h3>\n

API separator bottoms and DAF float belong to the wastewater plant, so the press has to live with that plant rather than merely beside it. The solids are fine and coated with oil, which is what closes a cloth fastest in oil sludge dewatering. In refinery sludge dewatering, where the filtrate returns matters as much as the cake does.<\/p>\n <\/div>\n

\n C<\/span>\n

Drill cuttings<\/h3>\n

Cuttings from oil-based mud arrive oily, water-repellent and sticky, and they move through most countries as hazardous waste billed on the tonne. Water-based cuttings are milder but salty and wet. Either way the job in oil sludge dewatering is volume, so the press is sized on cuttings samples — two formations rarely behave alike and no chart covers both.<\/p>\n <\/div>\n

\n D<\/span>\n

Mixed pit sludge<\/h3>\n

Skimming pits and emergency basins collect a little of everything, so the feed swings from watery to tar-like within a month. No fixed machine setting survives that range. A buffer tank ahead of the press and dosing that follows the feed are what make oil sludge dewatering workable on this stream.<\/p>\n <\/div>\n <\/div>\n

Size the machine for oil sludge dewatering against the blend in the pit and the freshest samples — design figures are a starting point, not the final answer. Petroleum sludge moves with the season, the crude slate and the tank being cleaned.<\/p>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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The machine<\/p>\n

Which press we build for the duty<\/h2>\n

Where the cake goes decides how dry it has to be, and the sludge decides how the machine handles it. Between the two, oil sludge dewatering usually lands on one of these four.<\/p>\n

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\"Membrane<\/figure>\n
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Membrane filter press<\/h3>\n

After the chambers fill, the membrane plate is inflated and squeezes the cake a second time. That second squeeze gives the driest cake and the shortest cycle on sludge that holds its water. It is the usual answer for oil sludge dewatering when the cake is hauled off or fed to a thermal unit. See how the membrane filter press<\/a> is put together.<\/p>\n \n <\/div>\n <\/div>\n

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\"Chamber<\/figure>\n
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Chamber filter press<\/h3>\n

Recessed plates fill and hold under pump pressure, with no second squeeze. It is the straightforward machine for a steady single stream whose cake specification leaves some room, and it keeps the capital side of oil sludge dewatering down. Many refineries run one on the same stream for years without changing the settings. See the chamber filter press<\/a>.<\/p>\n \n <\/div>\n <\/div>\n

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\"Automated<\/figure>\n
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Automated filter press<\/h3>\n

Plate shifting, cloth washing and discharge run on a programmed cycle, and operators step in by exception instead of holding a watch. It suits a site running several oil sludge dewatering batches a day with the same crew. The sequence is written from the test on your sludge rather than copied from a default. See the automated filter press<\/a>.<\/p>\n \n <\/div>\n <\/div>\n

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\"Mobile<\/figure>\n
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Mobile filter press<\/h3>\n

Press, feed pump and controls leave our floor on a skid or inside a container, already piped and wired. It lands on a prepared pad, dewaters for the length of the campaign and moves on when the job does. Tank cleaning crews and drilling rigs work this way where building a plant would not pay, and plenty keep the unit afterwards as standby cover for the fixed line. See the mobile filter press<\/a>.<\/p>\n \n <\/div>\n <\/div>\n <\/div>\n

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Where a belt filter press fits<\/h3>\n

Some duties run better on a continuous cycle. When the sludge comes from the plant's own biological treatment, with the oil taken out upstream, a belt filter press<\/a> runs continuously at 12–100 m³\/h and leaves a stackable cake. The two are split by duty: the low-oil biological sludge goes to the belt filter press, while the high-oil streams on this page stay with a filter press.<\/p>\n <\/div>\n

\n \"High-pressure\n
Belt filter press built for continuous duty<\/figcaption>\n <\/figure>\n <\/div>\n
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Choosing between them<\/h3>\n

Three questions settle most oil sludge dewatering enquiries: where the cake has to go, how it behaves in the chambers, and how many hands the site can put on it.<\/p>\n

\n \n \n
If this is the case<\/th>The press to start from<\/th>The reason<\/th><\/tr><\/thead>\n
The cake leaves the site by truck<\/td>Membrane filter press<\/td>Driest cake, so the least tonnage is billed<\/td><\/tr>\n
The cake feeds an incinerator, dryer or pyrolysis unit<\/td>Membrane filter press<\/td>Less water heated, so less fuel and a smaller unit<\/td><\/tr>\n
One steady stream, and a moderate cake target is enough<\/td>Chamber filter press<\/td>Straightforward cycle and lower capital cost<\/td><\/tr>\n
Several batches a day run by a small crew<\/td>Automated filter press<\/td>Programmed plate shifting, cloth washing and discharge<\/td><\/tr>\n
The sludge moves: tank cleaning, drilling campaigns<\/td>Mobile filter press<\/td>Arrives piped and wired, leaves when the job does<\/td><\/tr>\n
Sludge from the plant's own biological treatment, steady flow<\/td>Belt filter press<\/td>Runs continuously instead of in batches<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n

The press is the dewatering step, not the whole line. Stable emulsions and wax-bound sludge are settled upstream, through conditioning and pre-treatment, so the press receives something it can actually dewater.<\/p>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Where it is installed<\/p>\n

Four places this work happens<\/h2>\n

The sludge picks the machine; the site picks how it is laid out. These four cover most of the oil sludge dewatering installations we ship, and they are the shapes oily sludge treatment usually takes on a site.<\/p>\n

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\n 01<\/span>\n

Refinery wastewater plant<\/h3>\n

The dewatering house belongs to the plant: it borrows power and steam, its filtrate goes back to the separator, and the hazardous-area boundary decides where it may stand. Most refinery sludge dewatering upgrades are fitted into a shutdown measured in days.<\/p>\n

What you get<\/b> — new capacity without a shutdown story to explain.<\/p>\n <\/div>\n

\n 02<\/span>\n

Tank farm cleaning<\/h3>\n

A tank out of service earns nothing, so everything runs on how fast the bottoms leave. A mobile unit beside the tank makes oil sludge dewatering a local job: what leaves is cake rather than sludge, and the tank goes back sooner, on ordinary trucks where the permits allow.<\/p>\n

What you get<\/b> — a shorter campaign and far fewer tonnes on the road.<\/p>\n <\/div>\n

\n 03<\/span>\n

Drilling site or cuttings yard<\/h3>\n

Remote, temporary, and usually dusty or wet. The equipment has to arrive complete and start without a construction period in front of it, because the rig schedule waits for nothing.<\/p>\n

What you get<\/b> — a unit that starts on the day it lands.<\/p>\n <\/div>\n

\n 04<\/span>\n

Contractor and disposal yard<\/h3>\n

The feed here is whatever the customers bring, so it swings wider than any single refinery's. Buffer storage, dosing that follows the feed and an automated cycle absorb those swings, which is what keeps oil sludge dewatering running through a mixed week.<\/p>\n

What you get<\/b> — mixed feed all week without daily intervention.<\/p>\n <\/div>\n <\/div>\n

Yours may sit between two of these. Send the stream data and the site constraints, and we will size oil sludge dewatering on what you actually handle.<\/p>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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The line around it<\/p>\n

What sits either side of the press<\/h2>\n

The press doing the oil sludge dewatering is one link in the line, and the links ahead of it decide most of what happens inside it. Problems blamed on the machine usually start in the tank, the pump or the dosing.<\/p>\n

    \n
  1. 01<\/span>

    Reception and buffer<\/h3>

    A batch press needs a steady feed and oily sludge arrives in surges. Storage ahead of the press evens the swings out, and it is what makes batch oil sludge dewatering practical here at all.<\/p><\/li>\n

  2. 02<\/span>

    Screening and pre-treatment<\/h3>

    Coarse solids and grit come out, and heat goes in where wax or viscosity is in the way. Whatever is skipped here turns up at the cloth instead.<\/p><\/li>\n

  3. 03<\/span>

    Conditioning<\/h3>

    Emulsion-breaking chemicals and flocculant gather oil-coated particles into something that lets go of its water. The dose comes from a jar test on today's sludge, and it decides whether you get cake or porridge — it is the step most oily sludge treatment schemes underestimate.<\/p><\/li>\n

  4. 04<\/span>

    Fill, hold and squeeze<\/h3>

    This is the oil sludge dewatering cycle: the chambers fill, the pump holds pressure, and on a membrane press the plates squeeze a second time. Cake drops out and the filtrate goes back to the front of the plant, not to the drain.<\/p><\/li>\n

  5. 05<\/span>

    Cake out, cloth washed<\/h3>

    The cake goes to whichever destination was agreed before sizing started, and the cloth is washed between cycles to keep it open. Chemical washing runs on an interval set from the test data.<\/p><\/li>\n <\/ol>\n

    \n \"Loway\n
    Filter press sets lined up for an oil sludge dewatering project<\/figcaption>\n <\/figure>\n
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    \"Refinery<\/div>\n

    In a refinery the dewatering line is one part of the wastewater plant, and its interfaces are what make or break the job: where the filtrate returns, which supplies it borrows, and where the hazardous-area boundary falls. Each of them shapes the line as much as the sludge does. They belong on the drawings from the start, and we bring them to the tender rather than finding them during construction.<\/p>\n <\/div>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Daily operation<\/p>\n

    Three things that decide how a line behaves<\/h2>\n

    Cake dryness is what a design is judged on. These three decide whether oil sludge dewatering is easy to live with once it runs, and they sit behind most of the trouble calls we take.<\/p>\n

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    Cloth blinding and washing<\/h3>\n

    Oil closes a cloth faster than any municipal sludge, so in oil sludge dewatering the wash schedule is part of the design rather than a chore left to the operators. The cloth is specified for the stream — weave, weight and coating — high-pressure washing runs between cycles, and chemical washing is planned at intervals set from your test. A spare set on the shelf costs less than a press standing open.<\/p>\n <\/div>\n

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    Feed that swings<\/h3>\n

    Tank bottoms on Monday, DAF float on Thursday: solids, oil content and temperature all move. Dosing follows the feed, the buffer tank absorbs the worst of it, and the control system alarms before cake quality drifts far enough to matter — that is what holds oil sludge dewatering steady across a week of mixed feed.<\/p>\n <\/div>\n

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    Hazardous areas and sealing<\/h3>\n

    Light ends and vapour mean parts of the line may fall inside a hazardous-area classification. We build to the classification your project defines: electrics specified for the zone, enclosed conveyance for the cake, and sealing arranged so filtrate and drips land where they were meant to land. Send us the zone drawings early and the equipment arrives matching them.<\/p>\n <\/div>\n <\/div>\n

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    \n \"Beakers\n \"Filter\n <\/div>\n
    Cake and filtrate from an oil sludge dewatering run<\/figcaption>\n <\/figure>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Projects & support<\/p>\n

    From tender drawings to spare cloths<\/h2>\n
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    An oil sludge dewatering tender asks for general arrangement drawings, interface points agreed with the piping and civil designers, and a commissioning plan that fits a shutdown window — on top of the machine itself. The presses are built in our own factory, so the drawings and the machine come from the same floor and match each other. The gaps that usually appear during construction are closed before they open.<\/p>\n

    The press is the part we manufacture; dosing packages, feed pumps and compressors are bought-in items, and we say so on the quotation. You can have us integrate them into one supply, or source them yourself against our interface drawings — either way, the connections are designed to fit.<\/p>\n

    After handover, cloths, plates and wear parts ship worldwide against the unit number, and for oil service we will suggest a cloth stock from the first order, because a blinded cloth should cost the line no more than the time a change takes. Factory capability and inspection points are on the company and factory<\/a> page.<\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    FAQ<\/p>\n

    Oil sludge dewatering questions we are asked most<\/h2>\n
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    Filter press or centrifuge for oil sludge — which one?<\/summary>

    Both are in service, and the sludge usually picks. A decanter centrifuge runs continuously and suits large, steady flows where a wetter cake is acceptable. A membrane filter press gives the drier cake and the clearer filtrate that transport, thermal duty and filtrate-return schemes ask for, at the cost of batch operation and buffer storage. Send us the sludge data and the cake destination, and we will compare both on your numbers rather than defend one catalogue.<\/p><\/details>\n

    Will the oil be recovered from the sludge?<\/summary>

    Whatever recovery is possible depends on the feed and on the conditioning chemistry around the press, so we treat it as a test result rather than a promise. What we can put in writing is the data: we run your sludge through the proposed route and report what the press actually did — cake, filtrate and the oil each stream carried. Decisions on recovery then rest on measurements, not on a brochure.<\/p><\/details>\n

    What cake dryness should we plan the disposal contract around?<\/summary>

    From the destination first, and then from a test on your sludge. A membrane press on conditioned oil sludge and a gravity machine on the same sludge land far apart, so the honest figure for oil sludge dewatering comes out of the test report we issue with the quotation. Anything we assume on the way is written down as an assumption, not left in the small print.<\/p><\/details>\n

    Can the equipment be installed in a hazardous area?<\/summary>

    Yes, built to the classification your project defines. We ask for the area classification drawings early and specify motors, buttons, lighting and instrumentation to match the zones they sit in. The classification itself comes from your side, because it belongs to the site and the permit — what we commit to is equipment that matches it.<\/p><\/details>\n

    What do you need to quote an oil sludge dewatering duty?<\/summary>

    The sludge: where each stream comes from, its solids, oil content, pH and temperature, and samples if they can be spared. The duty: tonnes or cubic metres per day and the hours the line runs. And the destination: transport, thermal treatment or a contractor, with whatever the permits require of the cake. With those three, the route usually selects itself, and the quotation carries its assumptions in plain sight.<\/p><\/details>\n

    Fixed installation or mobile skid — how do we choose?<\/summary>

    By how long the sludge stays put. A refinery or a disposal yard that produces sludge every week justifies a fixed oil sludge dewatering installation designed into the plant. A tank cleaning contractor or a drilling campaign that moves on does better with a skid that travels with the job. Sites that do both often start with a skid and keep it as the standby for the fixed line.<\/p><\/details>\n<\/div><\/div><\/section>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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