CN104528980B - The treatment process of town domestic sewage and device - Google Patents

The treatment process of town domestic sewage and device Download PDF

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Publication number
CN104528980B
CN104528980B CN201410846826.XA CN201410846826A CN104528980B CN 104528980 B CN104528980 B CN 104528980B CN 201410846826 A CN201410846826 A CN 201410846826A CN 104528980 B CN104528980 B CN 104528980B
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China
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cylindrical shell
medium
filtration
water
pipe connecting
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CN201410846826.XA
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CN104528980A (en
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张明文
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LUZHOU NANFANG FILTRATION EQUIPMENT CO Ltd
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LUZHOU NANFANG FILTRATION EQUIPMENT CO Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption

Abstract

The invention discloses treatment process and the device of town domestic sewage, comprise efficient adsorption device, the first filtration unit and the second filtration unit; Efficient adsorption device comprises first medium cylindrical shell and is arranged on the efficient adsorption material in first medium cylindrical shell; First filtration unit comprises second medium cylindrical shell, retaining plate, the first filtration medium and standpipe; Second medium cylindrical shell comprises the second cylindrical shell and the second cover, and retaining plate horizontal welding is connected in the second cylindrical shell, and the oral area of the first filtration medium is connected with retaining plate, and the upper end of standpipe is welded with retaining plate, the lower end of standpipe and the second barrel soldering; Second filtration unit comprises the 3rd medium cylindrical shell, the second filtration medium and filter shaft; 3rd medium cylindrical shell comprises the 3rd cylindrical shell and the 3rd cover, the lower end of filter shaft and the 3rd barrel soldering; Second filtration medium to be sleeved on filter shaft and to be locked by hold-down nut.Sewage can reach the urban reclaimed water water quality standard in urban sewage reutilization after process of the present invention.

Description

The treatment process of town domestic sewage and device
Technical field
The invention belongs to filtration art, be specifically related to a kind for the treatment of process and device of town domestic sewage.
Background technology
China is that Freshwater resources lack country, and especially urban water shortage is very serious.Country increases the construction of municipal sewage plant in recent years, municipal sewage treatment rear water resources up to standard is directly discharged, along with the speed of Urbanization in China is accelerated, improving constantly of Living consumption, sanitary sewage quantity discharged after up to standard is very huge, and the increasing velocity of every annual emissions is more and more faster.Become municipal effluent through 80% of estimation Supplies of Tap Water in Cities to enter in urban pipe network, if collected, after manipulation of regeneration, wherein 70% can be back to urban reclaimed water, water for scenic environment use etc.For a long time in urban construction: road cleans; Fire-fighting, urban afforestation water; Vehicle wash; Building operation miscellaneous water etc. is all directly use tap water, calculates according to statistics: city " water and spill road and place water consumption 1.0-1.5(L/ ㎡. secondary), water and spill number of times 2-3 (secondary/d); Greening water consumption 1.5-2.0(L/ ㎡. secondary), water and spill number of times 1-2 ", consume a large amount of city tap-waters.Surface is seen convenient and swift, but within the water price of measuring and calculating regeneration water production cost is 1 yuan/cubic metre, and road cleaning, fire-fighting, greening, vehicle wash etc. are 3-4 unit/cubic meter by the water price of tap water.Both waste water resource, consumes the energy again, and the city maintenance expense waste of government also can not count carefully, and uses regeneration water, meet the Sustainable development of national economy, society so universal as early as possible.
Summary of the invention
The object of this invention is to provide a kind for the treatment of process and device of town domestic sewage, it to urban wastewater treatment firm (the A level in GB18918-2002 primary standard) discharge water deodorizing, reduction Colority of Sewage Water, can reach the urban reclaimed water water quality standard in urban sewage reutilization (GBT18920-2002).
The treatment unit of town domestic sewage of the present invention, comprises adsorption unit, the first filtration unit, the second filtration unit, the first pipe connecting and the second pipe connecting;
Described adsorption unit comprises first medium cylindrical shell and is arranged on the sorbing material in first medium cylindrical shell, and the top of described first medium cylindrical shell has the first water-in, and the bottom of first medium cylindrical shell has the first water outlet;
Described first filtration unit comprises second medium cylindrical shell, retaining plate, the first filtration medium and standpipe, described second medium cylindrical shell comprises the second cylindrical shell and the second cover, the bottom of the second cylindrical shell has the second water-in and the second water outlet, described retaining plate horizontal welding is connected in the second cylindrical shell, retaining plate offers via hole, described first filtration medium entirety is in bag-shaped, first filtration medium extend in the cavity that retaining plate and the second cylindrical shell surround by this via hole, and the oral area of the first filtration medium is connected with retaining plate, described standpipe is vertically arranged in the second cylindrical shell, and the upper end of standpipe is passed retaining plate and is welded with retaining plate, the lower end of described standpipe is with the second barrel soldering and be communicated with the second water-in,
One end of described first pipe connecting is connected with the first water outlet on adsorption unit, and the other end of described first pipe connecting is connected with the second water-in on the first filtration unit;
Described second filtration unit comprises the 3rd medium cylindrical shell, the second filtration medium and filter shaft; Described 3rd medium cylindrical shell comprises the 3rd cylindrical shell and the 3rd cover, the bottom of described 3rd cylindrical shell has the 3rd water-in and the 3rd water outlet, described filter shaft is the body of hollow, sidewall on body is provided with multiple aperture along its length, described filter shaft is vertically arranged in the 3rd medium cylindrical shell, and the lower end of filter shaft to be communicated with the 3rd water outlet with the 3rd barrel soldering; Described second filtration medium to be sleeved on filter shaft and to be locked on filter shaft by hold-down nut;
One end of described second pipe connecting is connected with the second water outlet on the first filtration unit, and the other end of described second pipe connecting is connected with the 3rd water-in on the second filtration unit.
Be provided with three the first filtration mediums in described first filtration unit, and the upper end of described standpipe is positioned at the centre of three the first filtration mediums.
The oral area of described first filtration medium is connected with retaining plate by card fourth chuck;
Each described card fourth chuck comprises chuck and at least two card fourths, each card fourth is welded on the edge of retaining plate near via hole respectively, and the oral area of the first filtration medium there is elasticity can the connection section of press seal, the oral area of the first filtration medium is by this connection section, card fourth chuck press seal.
Described first medium cylindrical shell comprises the first cylindrical shell and the first cover, and the first cylindrical shell is connected by hold-down gear with the first cover; Described second cylindrical shell is connected by hold-down gear with the second cover; Described 3rd cylindrical shell is connected by hold-down gear with the 3rd cover, and the bottom of described first cylindrical shell, the second cylindrical shell and the 3rd cylindrical shell is equipped with leg.
Described first cover, the second cover and the 3rd cover are equipped with tensimeter and vapor pipe.
First water inlet of described first medium cylindrical shell is connected with the first inlet pipe joint by ring flange, and the first water outlet of first medium cylindrical shell is welded with first and goes out tube stub;
Second water inlet of described second cylindrical shell is welded with the second inlet pipe joint, and the second water outlet of described second cylindrical shell is welded with second and goes out tube stub;
3rd water inlet of described 3rd cylindrical shell is welded with the 3rd inlet pipe joint, and the 3rd water outlet of described 3rd cylindrical shell is welded with the 3rd and goes out tube stub;
On one end of described second pipe connecting and the first filtration unit second goes out tube stub removably links together, and the 3rd inlet pipe joint on the other end of described second pipe connecting and the second filtration unit removably links together.
One end and first of described first pipe connecting is gone out tube stub and is connected by ring flange, and the other end of described first pipe connecting is connected by ring flange with the second inlet pipe joint;
The other end of described second pipe connecting is connected by ring flange with the 3rd inlet pipe joint.
The both sides up and down of described second filtration medium are provided with leakproof seal circle near the position of filter shaft.
Described first filtration medium adopts PE material to make, and described second filtration medium adopts PE material to make.
The treatment process of a kind of town domestic sewage of the present invention, adopt as arbitrary in claim 1 to 9 as described in the treatment unit of town domestic sewage, it comprises the following steps:
A, adsorption step
Treatment sewage enters in first medium cylindrical shell by the first water-in of first medium cylindrical shell, and sewage de-tastes through the sorbing material in first medium cylindrical shell, flow into the first filtration unit by the first pipe connecting after desolventing technology;
B, coarse filtration step
Sewage through absorption enters in second medium cylindrical shell by the standpipe of the first filtration unit, and the impurity in sewage and a part of colloid enter the second filtration unit by the second pipe connecting after the first filter media in second medium cylindrical shell;
C, smart filtration step
Colloidal impurity in sewage is after the second filter media in the 3rd medium cylindrical shell, the urban reclaimed water water quality standard (GBT18920-2002) in urban sewage reutilization can be reached, the aperture of water after processing on filter shaft enters filter shaft, discharges finally by the 3rd water outlet on the 3rd medium cylindrical shell.
Patent of the present invention has the following advantages:
(1) first by adsorption unit, sewage is de-tasted, desolventing technology, then by the first filtration unit, coarse filtration is carried out to the impurity in sewage and a part of colloid, finally by the second filtration unit to the colloidal impurity in sewage carry out essence filter;
(2) filtered by three the first filtration mediums simultaneously, increase the contact area of liquid and the first filtration medium, make the effect of filtration better;
(3) adsorption unit is removably linked together by the first pipe connecting and the first filtration unit, first filtration unit is removably linked together by the second pipe connecting and the second filtration unit, when needs transport, dismantle and connect the first pipe connecting of adsorption unit and the first filtration unit, and connect the second pipe connecting of the first filtration unit and the second filtration unit, remove very convenient, and be convenient to transport;
(4) small volume, floor space is little;
(5) easy to clean, by the rational deployment to adsorption unit, the first filtration unit, the second filtration unit, make hydraulic detention time short, equipment is durable, changes quick, long service life;
(6) complete sets of equipment, fast;
(7) design technology is advanced, rationally, the combination of filter core, filter material is created, and be tightly connected safety;
(8) energy consumption is low, and working cost is low, and operating performance is stablized.
In sum, the present invention to urban wastewater treatment firm (the A level in GB18918-2002 primary standard) discharge water deodorizing, reduction Colority of Sewage Water etc., can reach the urban reclaimed water water quality standard (GBT18920-2002) in urban sewage reutilization.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view (removing the second cover) in Fig. 1;
Fig. 3 is the structural representation of the first filtration medium in the present invention.
Embodiment
Below in conjunction with accompanying drawing, patent of the present invention is described further.
The treatment unit of town domestic sewage as depicted in figs. 1 and 2, comprises adsorption unit, the first filtration unit, the second filtration unit, the first pipe connecting 19 and the second pipe connecting 16.
As shown in Figure 1, the sorbing material 23 that adsorption unit comprises first medium cylindrical shell 22 and is arranged in first medium cylindrical shell 22, the top of first medium cylindrical shell 22 has the first water-in, and the bottom of first medium cylindrical shell 22 has the first water outlet.Be connected with the first inlet pipe joint 21 in the first water inlet of first medium cylindrical shell 22 by ring flange, the first water outlet of first medium cylindrical shell 22 is welded with first and goes out tube stub 20.First medium cylindrical shell 22 comprises the first cylindrical shell 22b and the first cover 22a, and the first cylindrical shell 22b is connected by hold-down gear (such as: anchor ear) with the first cover 22a.The bottom of the first cylindrical shell 22b is provided with three legs 2.First cover 22a is respectively equipped with tensimeter 7 and vapor pipe 11.
As shown in Figure 1 to Figure 3, the first filtration unit comprises second medium cylindrical shell 8, retaining plate 4, first filtration medium 17, card fourth chuck 5 and standpipe 3; Second medium cylindrical shell 8 comprises the second cylindrical shell 8a and the second cover 8b, the bottom of the second cylindrical shell 8a has the second water-in and the second water outlet, the second inlet pipe joint 1 is welded with in second water inlet of the second cylindrical shell 8a, be welded with second at second water outlet of the second cylindrical shell 8a and go out tube stub 18, three legs 2 are also provided with in the bottom of the second cylindrical shell 8a, second cover 8b is respectively equipped with tensimeter 7 and vapor pipe 11, second cylindrical shell 8a is connected by anchor ear 6 with the second cover 8b.Retaining plate 4 horizontal welding is connected in the second cylindrical shell 8a, retaining plate 4 offers via hole 4a, first filtration medium 17 entirety is in bag-shaped, and the oral area of the first filtration medium 17 there is elasticity can the connection section 17a of press seal, first filtration medium 17 is extend in the cavity that retaining plate 4 and the second cylindrical shell 8a surround by this via hole 4a, and the oral area of the first filtration medium 17 is tightly connected by card fourth chuck 5 and retaining plate 4.Be specially: card fourth chuck 5 comprises chuck 5b and three card fourth 5a, three card fourth 5a are welded on the edge of retaining plate 4 near via hole 4a respectively, and the oral area of the first filtration medium 17 is by this connection section 17a, card fourth 5a chuck 5b press seal.Standpipe 3 is vertically arranged in the second cylindrical shell 8a, and the upper end of standpipe 3 is passed retaining plate 4 and welded with retaining plate 4, and the lower end of standpipe 3 is welded with the second cylindrical shell 8a and is communicated with the second water-in.
As shown in Figure 2, as preferably, in the first filtration unit, be provided with three the first filtration mediums 17, and the upper end of described standpipe 3 is positioned at the centre of three the first filtration mediums 17.Filtered by three the first filtration mediums 17 simultaneously, increase the contact area of liquid and the first filtration medium 17, make the effect of filtration better.
As depicted in figs. 1 and 2, adsorption unit is as follows with the annexation of the first filtration unit: described one end of first pipe connecting 19 is gone out tube stub 20 with first on adsorption unit and is connected by ring flange, and the other end of described first pipe connecting 19 is connected by ring flange with the second inlet pipe joint 1 on the first filtration unit.
As depicted in figs. 1 and 2, the second filtration unit comprises the 3rd medium cylindrical shell 9, second filtration medium 13 and filter shaft 12; 3rd medium cylindrical shell 9 comprises the 3rd cylindrical shell 9a and the 3rd cover 9b, the bottom of the 3rd cylindrical shell 9a has the 3rd water-in and the 3rd water outlet, 3rd water inlet of the 3rd cylindrical shell 9a is welded with the 3rd inlet pipe joint 15,3rd water outlet of the 3rd cylindrical shell 9a is welded with the 3rd and goes out tube stub 14,3rd cover 9b is respectively equipped with tensimeter 7 and vapor pipe 11, also be provided with three legs the 2, three cylindrical shell 9a to be connected by anchor ear 6 with the 3rd cover 9b in the bottom of the 3rd cylindrical shell 9a.Filter shaft 12 is the body of hollow, the sidewall on body is provided with along its length multiple aperture 12a, and filter shaft 12 is vertically arranged in the 3rd medium cylindrical shell 9, and the lower end of filter shaft 12 is welded with the 3rd cylindrical shell 9a and is communicated with the 3rd water outlet; Second filtration medium 13 to be sleeved on filter shaft 12 and to be locked on filter shaft 12 by hold-down nut 10; And be provided with leakproof seal circle (not shown) in the both sides up and down of the second filtration medium 13 near the position of filter shaft 12.
First filtration unit is as follows with the annexation of the second filtration unit: one end of the second pipe connecting 16 and on the first filtration unit second is gone out tube stub 18 and is connected by ring flange.The other end of the second pipe connecting 16 is connected by ring flange with the 3rd inlet pipe joint 15 on the second filtration unit.
Described in the treatment unit of town domestic sewage described in the present invention, the first filtration medium 17 adopts PE material to make, and described second filtration medium 13 adopts PE material to make.
The treatment process of a kind of town domestic sewage of the present invention, adopt the treatment unit of town domestic sewage of the present invention, it comprises the following steps:
A, adsorption step
Treatment sewage enters in first medium cylindrical shell 22 through the first inlet pipe joint 21, first water-in of first medium cylindrical shell 22 successively, the sorbing material 23(of sewage in first medium cylindrical shell 22 be such as: polymeric adsorbent, the existing sorbing material with absorption smell and decolouring function) de-taste, flow into the first filtration unit through the first pipe connecting 19 successively after desolventing technology;
B, coarse filtration step
Sewage through absorption enters in second medium cylindrical shell 8 by the standpipe 3 of the first filtration unit, and the impurity in sewage and a part of colloid enter the second filtration unit by the second pipe connecting after the first filtration medium 17 in second medium cylindrical shell 8 filters;
C, smart filtration step
Colloidal impurity in sewage is after the second filtration medium 13 in the 3rd medium cylindrical shell 9 filters, the urban reclaimed water water quality standard (GBT18920-2002) in urban sewage reutilization can be reached, the aperture 12a of water after processing on filter shaft 12 enters filter shaft 12, discharges finally by the 3rd water outlet on the 3rd medium cylindrical shell 9.

Claims (10)

1. a treatment unit for town domestic sewage, is characterized in that: comprise adsorption unit, the first filtration unit, the second filtration unit, the first pipe connecting (19) and the second pipe connecting (16);
Described adsorption unit comprises first medium cylindrical shell (22) and is arranged on the sorbing material (23) in first medium cylindrical shell (22), the top of described first medium cylindrical shell (22) has the first water-in, and the bottom of first medium cylindrical shell (22) has the first water outlet;
Described first filtration unit comprises second medium cylindrical shell (8), retaining plate (4), the first filtration medium (17) and standpipe (3), described second medium cylindrical shell (8) comprises the second cylindrical shell (8a) and the second cover (8b), the bottom of the second cylindrical shell (8a) has the second water-in and the second water outlet, described retaining plate (4) horizontal welding is connected in the second cylindrical shell (8a), retaining plate (4) offers via hole (4a), described first filtration medium (17) entirety is in bag-shaped, first filtration medium (17) extend in the cavity that retaining plate (4) and the second cylindrical shell (8a) surround by this via hole (4a), and the oral area of the first filtration medium (17) is connected with retaining plate (4), described standpipe (3) is vertically arranged in the second cylindrical shell (8a), and the upper end of standpipe (3) is passed retaining plate (4) and is welded with retaining plate (4), the lower end of described standpipe (3) is welded with the second cylindrical shell (8a) and is communicated with the second water-in,
Described one end of first pipe connecting (19) is connected with the first water outlet on adsorption unit, and the described the other end of the first pipe connecting (19) is connected with the second water-in on the first filtration unit;
Described second filtration unit comprises the 3rd medium cylindrical shell (9), the second filtration medium (13) and filter shaft (12); Described 3rd medium cylindrical shell (9) comprises the 3rd cylindrical shell (9a) and the 3rd cover (9b), the bottom of described 3rd cylindrical shell (9a) has the 3rd water-in and the 3rd water outlet, the body that described filter shaft (12) is hollow, sidewall on body is provided with along its length multiple aperture (12a), described filter shaft (12) is vertically arranged in the 3rd medium cylindrical shell (9), and the lower end of filter shaft (12) is welded with the 3rd cylindrical shell (9a) and is communicated with the 3rd water outlet; Described second filtration medium (13) is sleeved on filter shaft (12) and goes up and pass through hold-down nut (10) and be locked on filter shaft (12);
Described one end of second pipe connecting (16) is connected with the second water outlet on the first filtration unit, and the other end of described second pipe connecting (16) is connected with the 3rd water-in on the second filtration unit.
2. the treatment unit of town domestic sewage according to claim 1, is characterized in that: be provided with three the first filtration mediums (17) in described first filtration unit, and the upper end of described standpipe (3) is positioned at the centre of three the first filtration mediums (17).
3. the treatment unit of town domestic sewage according to claim 1 and 2, is characterized in that: the oral area of described first filtration medium (17) is connected with retaining plate (4) by card fourth chuck (5);
Each described card fourth chuck (5) comprises chuck (5b) and at least two card fourths (5a), each card fourth (5a) is welded on the edge of retaining plate (4) near via hole (4a) respectively, and the oral area of the first filtration medium (17) there is elasticity can the connection section (17a) of press seal, the oral area of the first filtration medium (17) is by this connection section (17a), card fourth (5a) chuck (5b) press seal.
4. the treatment unit of town domestic sewage according to claim 1 and 2, it is characterized in that: described first medium cylindrical shell (22) comprises the first cylindrical shell (22b) and the first cover (22a), and the first cylindrical shell (22b) is connected by hold-down gear with the first cover (22a); Described second cylindrical shell (8a) is connected by hold-down gear with the second cover (8b); Described 3rd cylindrical shell (9a) is connected by hold-down gear with the 3rd cover (9b), and the bottom of described first cylindrical shell (22b), the second cylindrical shell (8a) and the 3rd cylindrical shell (9a) is equipped with leg (2).
5. the treatment unit of town domestic sewage according to claim 4, is characterized in that: described first cover (22a), the second cover (8b) and the 3rd cover (9b) are equipped with tensimeter (7) and vapor pipe (11).
6. the treatment unit of town domestic sewage according to claim 1 and 2, it is characterized in that: the first water inlet of described first medium cylindrical shell (22) is connected with the first inlet pipe joint (21) by ring flange, the first water outlet of first medium cylindrical shell (22) is welded with first and goes out tube stub (20);
Second water inlet of described second cylindrical shell (8a) is welded with the second inlet pipe joint (1), and the second water outlet of described second cylindrical shell (8a) is welded with second and goes out tube stub (18);
3rd water inlet of described 3rd cylindrical shell (9a) is welded with the 3rd inlet pipe joint (15), and the 3rd water outlet of described 3rd cylindrical shell (9a) is welded with the 3rd and goes out tube stub (14);
On one end of described second pipe connecting (16) and the first filtration unit second goes out tube stub (18) removably links together, and the 3rd inlet pipe joint (15) on the other end of described second pipe connecting (16) and the second filtration unit removably links together.
7. the treatment unit of town domestic sewage according to claim 6, it is characterized in that: one end and first of described first pipe connecting (19) is gone out tube stub (20) and is connected by ring flange, the other end of described first pipe connecting (19) is connected by ring flange with the second inlet pipe joint (1);
One end and second of described second pipe connecting (16) is gone out tube stub (18) and is connected by ring flange, and the other end of described second pipe connecting (16) is connected by ring flange with the 3rd inlet pipe joint (15).
8. the treatment unit of town domestic sewage according to claim 1 and 2, is characterized in that: the both sides up and down of described second filtration medium (13) are provided with leakproof seal circle near the position of filter shaft (12).
9. the treatment unit of town domestic sewage according to claim 1 and 2, is characterized in that: described first filtration medium (17) adopts PE material to make, and described second filtration medium (13) adopts PE material to make.
10. a treatment process for town domestic sewage, is characterized in that: adopt as arbitrary in claim 1 to 9 as described in the treatment unit of town domestic sewage, it comprises the following steps:
A, adsorption step
Treatment sewage enters in first medium cylindrical shell (22) by the first water-in of first medium cylindrical shell (22), and sewage de-tastes through the sorbing material (23) in first medium cylindrical shell (22), flow into the first filtration unit by the first pipe connecting (19) after desolventing technology;
B, coarse filtration step
Sewage through absorption enters in second medium cylindrical shell (8) by the standpipe (3) of the first filtration unit, and the impurity in sewage and a part of colloid enter the second filtration unit by the second pipe connecting (16) after the first filtration medium (17) in second medium cylindrical shell (8) filters;
C, smart filtration step
Colloidal impurity in sewage is after the second filtration medium (13) in the 3rd medium cylindrical shell (9) filters, the urban reclaimed water water quality standard (GBT18920-2002) in urban sewage reutilization can be reached, the aperture (12a) of water after processing on filter shaft (12) enters filter shaft (12), discharges finally by the 3rd water outlet on the 3rd medium cylindrical shell (9).
CN201410846826.XA 2014-12-31 2014-12-31 The treatment process of town domestic sewage and device Active CN104528980B (en)

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Application Number Priority Date Filing Date Title
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CN104528980B true CN104528980B (en) 2016-03-02

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CN101343126B (en) * 2006-12-09 2010-11-10 谢永才 Apparatus for treatment of domestic wastewater
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