CN201358195Y - Water purifier set integrating pressure air flotation with filtration - Google Patents

Abstract

A water purifier set integrating pressure air flotation with filtration relates to a device for purifying oily wastewater in environmental engineering, and is characterized in that the water purifier set adopts an upright tank type pressure container, wherein the upper part is a vertical flow type pressure air flotation chamber, the lower part is a deep filter medium filtration chamber, and the two are combined into a whole. The water purifier set has a simple and compact structure, and the flow is short. Compared with the conventional process with the same treatment capability, the water purifier set has the advantages of less investment, smaller occupied area, lower running cost, better processing effect, and convenient operation and management. The oily wastewater treated by the water purifier set can achieve the GB8978-1996 integrated wastewater discharge standard. According to requirements, the water purifier set also can be used for purifying other wastewater.

Description

Pressure air supporting+filtering integral water purification unit

One, technical field

The utility model relates to a kind of device of oily(waste)water being implemented purifying treatment in the environmental engineering.

Two, background technology

Oily(waste)water adopts at present extensively " oil removal+partial reflux dissolved air floatation+filter to the flow depth layer down " treatment process, and is big as oil trap, air flotation pool floor space because the inherent defect of this process unit, complex structure; The air supporting water outlet needs through promoting once more and could filtering; After the filtrate back flushing, self-cleaning is not thorough, easily produces the inefficacy of hardening, and needs periodic replacement filtrate etc.; Therefore, construction investment is big, floor space is wide, working cost is high, operational administrative is difficult, poor processing effect, become common fault for this kind technology.

Three, summary of the invention

The purpose of this utility model be to provide a kind of construction investment province, floor space is little, working cost is low, operational administrative is easy, treatment effect is good integrated purifying unit (hereinafter to be referred as: unit), progressively replace existing oil-containing waste water treating device.Utility model is achieved in that unit is a Storage Tank type pressurized vessel, and top is vertical-flow pressure gas-floating chamber, and the bottom is deep layer media filtration chamber, and both are integrated; Gas-floating chamber is made up of disengagement chamber (a), contact chamber (b) and heavy stream chamber (c), the exposure chamber is welded in the tank body middle and upper part, be that a back taper swirler and water inlet pipe link, conical head top, separate chamber is provided with relief valve, the filtration chamber is made up of filter material layer and the large and small screen casing group and the base plate that are welded in the bottom bulkhead top, between base plate and bottom bulkhead, is separated with powerful backwash district and links to each other with powerful backwash pipe, rising pipe is welded in the end socket bottom, is welded with the backwash liquor level control pipe in addition on the tank body below the water inlet pipe.

With pending waste water pressurization, inject pressurized gas simultaneously, by gas-liquid mixing, time-delay pressurize, make it to form dissolved air water by the saturated homogeneous phase solution of gas.Quite a few elaioleucite and pollutent regularly enter scum silica frost separating tank (pond) by eddy flow and air supporting effect by the top relief valve in the interior waste water of jar, play the effect identical with oil trap, and heavy stream waste water is discharged by water shoot by big screen casing group after filter material layer is stopped.When the pollutent of filtrate obstruction reaches certain value, need carry out backwash operation; Water inlet pipe is changed its course and blow-off pipe UNICOM when the time comes, close rising pipe, open the liquid level control tube, close again after liquid level being dropped to reserve the backwash space; Enter pressurized air and dissolved air water by powerful backwash pipe, spray by little screen casing group, with the filtrate fluidisation and make and float to the top layer on the separated from contaminants through powerful backwash district; In the time of near the backwash liquid level rises to the swirler inverted cone surface, close powerful backwash pipe source of the gas, liquid level continues to rise, and the pollutent that backwash goes out enters blow-off pipe through the back taper swirler, and filtrate reaches self-cleaning thus, blow-off pipe can be connected in the conical head top as required.

Set structure is simply compact, and flow process is short, and the level of automation height adds and saved the one-level lifting, compares with the common process of same treatment ability, and reduced investment, occupation of land are less, working cost is low, treatment effect good, convenient operation and management.Because stablizing, vertical-flow pressure air supporting of employing and deep layer media filtration, oil in the waste water and suspended substance removal rate reach GB8978-1996 composite wastewater emission standard.

This unit also can be used for the purifying treatment of other waste water as required.

Four, description of drawings

Accompanying drawing 1 is pressure air supporting+filtering integral water purification unit sectional view.

Among the figure: 1. top relief valve; 2, conical head; 3, tank body; 4, back taper swirler; 5, manhole; 6, base plate; 7, big screen casing group; 8, little screen casing group; 9, filter out water pipe; 10, powerful backwash pipe; 11, bottom bulkhead; 12, powerful backwash district; 13, filter material layer; 14, backwash liquor level control pipe; 15, water inlet pipe (blow-off pipe); A, air flotation separating chamber; B, exposure chamber; C, heavy stream chamber.

Accompanying drawing 2 is pressure air supporting+filtering integral water purification unit sectional views that blow-off pipe is located at the conical head top.

Among the figure: the 1-14 sequence number is with accompanying drawing 1; 15, water inlet pipe; 16, blow-off pipe.

Five, embodiment

Oily(waste)water is pressurized to 0.2～0.4Mpa, inject pressurized gas (air simultaneously, nitrogen or petroleum gas), air pressure is greater than hydraulic pressure, tolerance is about 1～5% of the water yield, carry out the gas-liquid mixing by evenly mixing device, time-delay pressurize (time-delay 2～5min, pressurize 0.15～0.35MPa), make it to form the homogeneous phase solution under the saturated dissolved gas state, be pressed into the vertical-flow pressure gas-floating chamber on unit top through water inlet pipe (15), current enter the upflow velocity≤10mm/s in contact chamber (b), enter upflow velocity≤2mm/s of disengagement chamber (a), the residence time 〉=10min, scum silica frost regularly enters scum silica frost concentration tank (pond) by top relief valve (1); Sedimentation chamber (C) water outlet (oil-containing＜40mg/L) enter bottom deep layer filtering material filter, by filter material layer (13) (bed thickness 〉=1.2m) stop the back by big screen casing group (7) rising pipe (9) discharge after filtration.

The filtrate back flushing need be carried out following operation: water inlet pipe (15) is switched to blow-off pipe link to each other (close water inlet pipe, open blow-off pipe (as Fig. 2)), close and filter out water pipe (9), open backwash liquor level control pipe (14) emptying and close after reserving the backwash space; Behind powerful backwash pipe (10) injection pressurized gas (3～5 minutes), the dissolved air water that reinjects sprays from little screen casing group (8) through powerful backwash district (12), make the filtrate fluidisation and separated from contaminants is floated to upper layer, go into back taper swirler (4) with liquid level rising overflow, discharge (rise to the conical head top with liquid level and discharge (as Fig. 2)) through blow-off pipe (16) through blow-off pipe (15).

Claims (2)

1, a kind of pressure air supporting+filtering integral water purification unit is characterized in that: unit is a Storage Tank type pressurized vessel, and top is vertical-flow pressure gas-floating chamber, and the bottom is deep layer media filtration chamber, and both are integrated; Gas-floating chamber is made up of disengagement chamber (a), contact chamber (b) and heavy stream chamber (c), the exposure chamber is welded in the tank body middle and upper part, be that a back taper swirler and water inlet pipe link, conical head top, separate chamber is provided with relief valve, the filtration chamber is made up of filter material layer and the large and small screen casing group and the base plate that are welded in the bottom bulkhead top, between base plate and bottom bulkhead, is separated with powerful backwash district and links to each other with powerful backwash pipe, rising pipe is welded in the end socket bottom, is welded with the backwash liquor level control pipe on the tank body below the water inlet pipe.

2, integrated purifying unit as claimed in claim 1 can be connected in blow-off pipe the conical head top.

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