CN101704591B

CN101704591B - Sewage treatment method and device thereof

Info

Publication number: CN101704591B
Application number: CN2009102209241A
Authority: CN
Inventors: 吴浩; 刘荣臣; 刘俊龙; 张伟; 吕景春
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-12
Filing date: 2009-11-12
Publication date: 2011-08-10
Anticipated expiration: 2029-11-12
Also published as: CN101704591A

Abstract

The invention relates to a sewage treatment method and a device thereof. The sewage treatment method comprises that a continuous automatic sand filter is matched with an oil-mud thickening system in use; on the one hand, sewage filtration is performed in the continuous automatic sand filter so as to mainly remove a large amount of suspension and oil in the sewage, and the filtered water is colorless liquid and achieves the oilfield reinjection standard, and on the other hand, the sewage sand is backwashed in the continuous automatic sand filter; and then, the sand washing sewage of the continuous automatic sand filter enters the oil-mud thickening system to be further treated so as to separate the oil and the suspension in the sewage again and obtain sludge and oil only containing trace water, and the treated sand washing sewage is returned to be circularly treated. The continuous automatic sand filter and the oil-mud thickening system are matched in use, and the filtration process and the backwashing process are performed synchronously, so the cleaning for the sewage sand is quite thorough, the yield water has stable water quality and has no pollution, and the oil-mud thickening system can circularly treat the continuously produced sand washing sewage so as to realize zero emission of the sewage.

Description

A kind of sewage water treatment method and device thereof

One, technical field:

What the present invention relates to is the processing method that sewage is handled, and what be specifically related to is a kind of sewage water treatment method and device thereof.

Two, background technology:

The sewage treatment process of former field joint stations needs a lot of production off-set facility, one-time investment is big, troublesome poeration and production efficiency are lower, filtrate in the strainer need stop production backwash, the dirty sand hourly water consumption of backwash is big and need to be equipped with bigger backwash pump, therefore also needs to expend the bigger energy.The existing waste disposal plant in oil field is widely used on oil-contaminated water of oil field is handled, but it in the production run process and exist water wasting, expense electricity, shortcoming such as floor space is big, personnel operation is complicated, the routine maintenance amount is bigger, reduced production efficiency; From the general treatment process in oil field, need to be provided with sewage lagoon, sludge sump, contaminated-oil basin, back flushing pond and a large amount of lifting water pumps in the whole technology, such technology has just increased a large amount of one-time investments virtually, and taken bigger land use area, can not obtain basic solution in the processing of washed-out sand sewage, the fund of so both having wasted has also been wasted great amount of water resources simultaneously.

Three, summary of the invention:

An object of the present invention is to provide a kind of sewage water treatment method, another object of the present invention provides the device that this sewage water treatment method uses, and sewage water treatment method provided by the invention and device thereof are used to solve the problem that the existing waste disposal plant investment in oil field is big, waste is serious.

The technical solution adopted for the present invention to solve the technical problems is: this sewage water treatment method is with sand-bed filter and greasy filth multiviscosisty system support are used automatically continuously, in continuously automatic sand-bed filter, carry out sewage water filtration on the one hand, a large amount of suspended substance and oil in the main removal sewage, filter back water outlet is a colourless liquid, reach oil field re-injection standard, on the other hand dirty sand is carried out backwash simultaneously; Then, the washed-out sand sewage of sand-bed filter enters greasy filth multiviscosisty system automatically continuously, and washed-out sand sewage is further processed, and oil and suspended substance in the sewage are separated once more, obtains mud and reaches the oil that only contains minor amount of water, and the washed-out sand sewage after the processing returns circular treatment.

The waste disposal plant that a kind of above-mentioned sewage water treatment method uses comprises continuously sand-bed filter, greasy filth multiviscosisty system automatically, and sand-bed filter connects greasy filth multiviscosisty system by pipeline automatically continuously; Greasy filth multiviscosisty system comprises solid-liquid cyclone, de-oiling swirler, whizzer, and solid-liquid cyclone is connected with whizzer on the one hand, is connected with the de-oiling swirler on the other hand.

A topping-up pump is installed before the greasy filth multiviscosisty system in the such scheme, and the de-oiling swirler connects slop oil tank.

Automatically before the sand-bed filter slurry tank is installed continuously in the such scheme, slurry tank has two, is divided into the I and II slurry tank, can make the better effects if of the present invention to disposing polluted water in oil like this.

Continuously automatic sand-bed filter in the such scheme comprises sand filter blanket, sand extraction tube, sand-washing device, the water inlet pipe in filtration vessel, the container, it above the sand filter blanket clean water chamber, clean water chamber is communicated with water outlet, the outlet correspondence of sand extraction tube sand-washing device, water inlet pipe connects the radiation formula water feed apparatus, and the water distributor of radiation formula water feed apparatus is the center with the water inlet pipe, radially, be distributed on the periphery of water inlet pipe, water distributor communicates with water inlet pipe.

The sand extraction tube of continuously automatic sand-bed filter upwards inserts the sand-washing device from the filtration vessel bottom in the such scheme, airduct is communicated with the bottom of sand extraction tube, sand-washing device connects sewage chamber, sewage chamber connects leads to the outer blow-off pipe of filtration vessel, the sewage chamber top is lower than the water leg horizontal plane, clean water chamber is provided with water leg, and water leg connects water outlet.

The sand separator of umbrella shape is installed in the water inlet pipe of continuously automatic sand-bed filter below in the such scheme, and sand separator can play the effect of sub-sand on the one hand, and the sand of falling on it is fallen equably along the umbrella shape face; In addition, the water that is sprayed onto on it can make it can also play the effect of water distribution uniformity along the movement in a curve that makes progress.

Air-floating apparatus is equipped with in the sand-washing device bottom of the continuously automatic sand-bed filter in the such scheme.

Beneficial effect:

1, the present invention will sand-bed filter and greasy filth multiviscosisty system support be used automatically continuously, filtration procedure and backwash process carry out synchronously, it is very thorough to clean dirty sand, stable effluent quality, pollution-free, and greasy filth multiviscosisty system can make the washed-out sand sewage of successive generation obtain circular treatment, realizes sewage zero-discharge.

2, the present invention has saved back flushing pond, sludge sump, contaminated-oil basin and sewage lagoon, this technology can be saved one-time investment greatly, and also will save much than traditional technology on running cost after being put into production and moving, be easy to installation, operation and maintenance, longer service life.

3, the cleaning system of the continuously automatic sand-bed filter among the present invention need not big load impact equipment.

Need not pre-treatment when 4, the present invention handles high-concentration sewage.

5, head loss of the present invention is low, and energy consumption is little, and overheads and maintenance cost are few.

Four, description of drawings:

Fig. 1 is the structural representation of waste disposal plant among the present invention;

Fig. 2 is the structural representation of continuously automatic sand-bed filter among Fig. 1;

Fig. 3 is the structural representation of radiation formula water feed apparatus among Fig. 2.

1 filtration vessel, 2 sand extraction tubes, 3 sand-washing devices, 4 water inlet pipes, 5 water legs, 6 mill weirs, 7 water outlets, 8 blow-off pipes, 9 radiation formula water feed apparatus, 10 airducts, 11 sewage chamber, 12 sand separators, 13 air-floating apparatus 14 unload sandpipe 15 water shoots 16 water distributors 17 first grade subsides jars 18 secondary slurry tanks 19 continuously automatic sand-bed filter 20 solid-liquid cyclones 21 de-oiling swirlers 22 whizzers 23 slop oil tanks 24 surge tanks 25 surge tanks 26 filter back water pots

Five, embodiment:

The present invention is described further below in conjunction with accompanying drawing:

Embodiment 1:

As shown in Figure 1, this waste disposal plant comprises slurry tank, continuously automatic sand-bed filter 19, greasy filth multiviscosisty system, slop oil tank 23, slurry tank has two, be respectively first grade subsides jar 17 and secondary slurry tank 18, first grade subsides jar 17 is the natural subsidence jar, secondary slurry tank 18 is the coagulant precipitation jar, and the water outlet of first grade subsides jar 17 links to each other by the water-in of pipeline with secondary slurry tank 18, removes bigger suspended substance and the viscous crude of particle by the two-stage sedimentation; The water outlet of secondary slurry tank 18 is connected by the water inlet pipe 4 of pipeline with continuously automatic sand-bed filter 19, in the present embodiment, and secondary slurry tank 18 and the surge tank 24 and the pump that also are provided with between the sand-bed filter 19 automatically continuously; Automatically the water outlet 7 of sand-bed filter is connected to filter back water pot 26 continuously, clear water after continuously automatic sand filtration is filtered is transported in the water pot 26 of filter back, and the washed-out sand blow-off pipe 8 of continuously automatic sand-bed filter is connected to the solid-liquid cyclone 20 of greasy filth multiviscosisty system through surge tanks 25 and topping-up pump; Greasy filth multiviscosisty system comprises solid-liquid cyclone 20, de-oiling swirler 21, whizzer 22, and solid-liquid cyclone 20 is connected with de-oiling swirler 21 on the one hand, and de-oiling swirler 21 is connected with slop oil tank 23, and the oil that minor amount of water is contained the most at last in this branch is sent into slop oil tank 23; Solid-liquid cyclone 20 is connected with whizzer 22 on the other hand, and this branch obtains mud; Simultaneously, the sewage after solid-liquid cyclone 20, de-oiling swirler 21, whizzer 22 are handled turns back to slurry tank and carries out circular treatment.Better for separating effect in the present embodiment, solid-liquid cyclone 20 is provided with two.

Fig. 2 provides continuously the structural representation of sand-bed filter automatically, this continuously automatic sand-bed filter comprises filtration vessel 1, certain thickness quartz sand filter media is housed in the container, forming sand filter blanket, is clean water chamber above the sand filter blanket, and clean water chamber is provided with water leg 5, water leg 5 is arranged on the inwall of filtration vessel 1, in the form of a ring, water leg 5 is provided with height-adjustable sewage mill weir 6, and water leg 5 connects water outlet 7; For attractive in appearance reaching do not stop that quartz sand filter media falls, water inlet pipe 4 is installed in the top of filtration vessel 1 in the present embodiment, is positioned at blow-off pipe 8 belows, is inserted into the bottom of sand filter blanket then along down at right angles, water inlet pipe 4 connects radiation formula water feed apparatus 9, and the sand separator 12 of umbrella shape is installed in water inlet pipe 4 belows; Sand extraction tube 2 upwards inserts the sand-washing device 3 from filtration vessel 1 bottom, airduct 10 enters the filtration vessel 1 from the top of filtration vessel, and be inserted to the bottom of sand extraction tube 2 downwards and be connected with sand extraction tube 2, blowing device is supplied with the washed-out sand system by airduct 10 with wind, the one, ensure that the dirty sand in the filtration vessel 1 continuously cleans by sand extraction tube 2 supply sand-washing devices 3, the 2nd, by pressurized air the filtrate after washing in the sand-washing device 3 is cleaned once more completely, the dirt of filter material surface is taken away; The bottom of filtration vessel 1 is taper, and the bottom of tapered bottom and side thereof are respectively equipped with water shoot 15 and unload sandpipe 14; Sand-washing device 3 connects sewage chamber 11, sewage chamber 11 connects leads to the outer blow-off pipe 8 of filtration vessel, sewage chamber 11 tops are lower than water leg 5 horizontal planes, the top of sand-washing device 3 is a umbrella shape, air-floating apparatus 13 is equipped with in sand-washing device 3 bottoms, the sewage mill weir 6 of water leg 5 in the middle of sand-washing device 3 is looped around is kept apart washed-out sand sewage and clear water.

In the present embodiment, sand extraction tube 2 has three, insert separately in the corresponding sand-washing device 3, three cover sand-washing devices 3 are by sewage chamber 11 of the common connection of pipeline, three cover sand-washing devices, 3 shared cover air-floating apparatus, airduct 10 is connected with three sand extraction tubes 3 with pipeline by a gas distributor, and wind is offered three sand extraction tubes 3 respectively.Certainly, sand-washing device 3 can also be connected with sewage chamber separately, and three sewage chamber are discharged sewage by a blow-off pipe 8.Because sand extraction tube 2 upwards inserts the sand-washing device 3 from filtration vessel 1 bottom, like this, when the quartz sand that provides in the sand extraction tube 2 was transported to sand-washing device 3, the kinetic energy of quartz sand ran out, slowly fell under the effect of gravity then, and cleaning performance is relatively good.

Fig. 3 provides in the present embodiment continuously the structural representation of radiation formula water feed apparatus in the sand-bed filter automatically, as shown in the figure, water distributor 16 is connected with water inlet pipe 4, with water inlet pipe 4 is the center, each water distributor 16 is evenly arranged on the same horizontal plane along the periphery of water inlet pipe 4, and the other end of water distributor 16 is fixing to be fixed together with filtration vessel 1.Because water distributor 16 is outwards dispersed, and radially, make its water distribution more even, and sub-sand is effective.

Waste disposal plant carries out sewage water treatment method in the foregoing description:

1, oil-contaminated water of oil field carries out sedimentation through the I and II slurry tank in the sewage works, removes bigger suspended substance and the viscous crude of particle.

2, the sewage after slurry tank is handled enters continuously automatically, and sand-bed filter carries out sewage water filtration, mainly remove by suspended substance and oil a large amount of in the water outlet of I and II slurry tank, the water outlet effect is colourless liquid, reach oil field re-injection standard fully, in continuous automatically sand-bed filter, filter and the backwash of dirty sand is carried out simultaneously.Automatically the concrete working process of sand-bed filter is continuously: oily(waste)water directly enters continuously the bottom of sand-bed filter automatically by pipeline, under the effect of the radiation formula water feed apparatus 9 bottom filtration vessel, the upwards operation that sewage is mild, carry out filtration treatment by quartz sand filter media, clear water is slowly flowed out by water outlet 7, so just finished filtration procedure, in the whole filtration procedure filter bed of device interior for continuously, slowly, descending motion state stably, effluent quality and not influenced by it guarantees effectively reaching the ideal filter effect in the filtering layer; In the process of filtering oily sewage, sump oil and a large amount of suspended substances are trapped in the bottom of filtration vessel 1 by quartz sand filter media, therefore, this part contaminated filtrate is promoted to this part dirty sand in the sand-washing device 3 by a sand extraction tube 2 of filtration vessel 1 bottom and cleans, dirty sand in the sand-washing device 3 carries out the motion of irregular whereabouts in a kind of special space of curves, make the mutual collision friction of this part quartz sand that its dirt with quartz sand surface is washed, more thorough for guaranteeing that filtrate cleans, in sand-washing device 3 bottoms air-floating apparatus 13 is housed, its objective is some difficult dirts of removing of filter material surface are washed once more, make it reach best cleaning performance, quartz sand filter media after the cleaning falls back to filter bed again and carries out work, keep filtrate to be in clean conditions always, washed-out sand sewage is also discharged from one with the isolated blow-off pipe 8 of clear water zone, has so just realized filtering with cleaning and has carried out non-interfering working process simultaneously.

3, the washed-out sand sewage of continuously automatic sand-bed filter 19 enters greasy filth multiviscosisty system, washed-out sand sewage is further processed, in solid-liquid cyclone 20, suspended substance is further separated, in de-oiling swirler 21, oil is further separated then, and remove whizzer 22 through the sewage that another solid-liquid cyclone 20 is handled once more, whizzer 22 is handled and is obtained mud, the oil that contains minor amount of water from de-oiling swirler 21 enters slop oil tank 23, and the sewage of solid-liquid cyclone 20, de-oiling swirler 21, whizzer 22 carries out circular treatment again.

Waste disposal plant provided by the invention is compared with the existing waste disposal plant in oil field, back flushing pond, sludge sump, contaminated-oil basin and sewage lagoon have been saved, this device puts into production after the operation, can save one-time investment greatly, and on running cost, also will save much than conventional apparatus; Advanced continuously automatic sand-bed filter is in operational process, do not need to set up back flushing pond and backwash pump, filtration procedure and backwash process carry out synchronously, promptly do not influence production, that also dirty sand can be cleaned simultaneously is very thorough, because the assurance of greasy filth multiviscosisty system can make the washed-out sand sewage of successive generation realize zero release, free of contamination phenomenon.

The present invention will sand-bed filter and greasy filth multiviscosisty system support be used automatically continuously, it is at the singularity of oilfield sewage and the sewage treatment process method of researching and developing, also be a kind of perfect combination of novel all-in-one sewage disposal device simultaneously, it can will reach after the sewage disposal with the notes standard, and the pollution products after handling can more effectively obtain improvement and can not influence environment.

Claims

1. sewage water treatment method, it is characterized in that: this sewage water treatment method is with sand-bed filter and greasy filth multiviscosisty system support are used automatically continuously, in continuously automatic sand-bed filter, carry out sewage water filtration on the one hand, a large amount of suspended substance and oil in the main removal sewage, filter back water outlet is a colourless liquid, reaches oil field re-injection standard, on the other hand dirty sand is carried out backwash simultaneously; Then, the washed-out sand sewage of sand-bed filter enters greasy filth multiviscosisty system automatically continuously, and washed-out sand sewage is further processed, and oil and suspended substance in the sewage are separated once more, obtains mud and reaches the oil that only contains minor amount of water, and the washed-out sand sewage after the processing returns circular treatment; Automatically sand-bed filter (19) comprises filtration vessel (1), interior sand filter blanket, sand extraction tube (2), sand-washing device (3), the water inlet pipe (4) of container continuously, it above the sand filter blanket clean water chamber, clean water chamber is communicated with water outlet (7), the outlet correspondence of sand extraction tube (2) sand-washing device (3), water inlet pipe (4) connects radiation formula water feed apparatus (9), the water distributor of radiation formula water feed apparatus (16) is the center with water inlet pipe (4), radially, be distributed on the periphery of water inlet pipe (4), water distributor (16) communicates with water inlet pipe (4).

2. the waste disposal plant that uses of the described sewage water treatment method of a claim 1, it is characterized in that: it comprises continuously sand-bed filter (19), greasy filth multiviscosisty system automatically, sand-bed filter (19) connects greasy filth multiviscosisty system by pipeline automatically continuously; Greasy filth multiviscosisty system comprises solid-liquid cyclone (20), de-oiling swirler (21), whizzer (22), and solid-liquid cyclone (20) is connected with whizzer (22) on the one hand, is connected with de-oiling swirler (21) on the other hand; Automatically sand-bed filter (19) comprises filtration vessel (1), interior sand filter blanket, sand extraction tube (2), sand-washing device (3), the water inlet pipe (4) of container continuously, it above the sand filter blanket clean water chamber, clean water chamber is communicated with water outlet (7), the outlet correspondence of sand extraction tube (2) sand-washing device (3), water inlet pipe (4) connects radiation formula water feed apparatus (9), the water distributor of radiation formula water feed apparatus (16) is the center with water inlet pipe (4), radially, be distributed on the periphery of water inlet pipe (4), water distributor (16) communicates with water inlet pipe (4).

3. waste disposal plant according to claim 2 is characterized in that: a preceding topping-up pump, de-oiling swirler (21) the connection slop oil tank (23) installed of described greasy filth multiviscosisty system.

4. waste disposal plant according to claim 3 is characterized in that: before the described continuously automatic sand-bed filter slurry tank is installed, slurry tank has two, is first grade subsides jar (17) and secondary slurry tank (18).

5. waste disposal plant according to claim 4, it is characterized in that: the sand extraction tube (2) of described continuously automatic sand-bed filter upwards inserts the sand-washing device (3) from filtration vessel (1) bottom, airduct (10) is communicated with the bottom of sand extraction tube (2), sand-washing device (3) connects sewage chamber (11), sewage chamber (11) connects leads to the outer blow-off pipe (8) of filtration vessel (1), sewage chamber (11) top is lower than the water leg horizontal plane, clean water chamber is provided with water leg (5), and water leg (5) connects water outlet (7).

6. waste disposal plant according to claim 5 is characterized in that: air-floating apparatus (13) is equipped with in described sand-washing device (3) bottom; The sand separator (12) of umbrella shape is installed in described water inlet pipe (4) below.