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Strip-type funneling solid-liquid separator and gas lifting pulsation push flowing oxidation ditch thereof

A solid-liquid separator, solid-liquid separation technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Work energy consumption is too large, the structure of the solid-liquid separator is complex, etc., to achieve the effect of good effluent water quality, good denitrification and phosphorus removal effect, and reduction of production and maintenance costs.

Inactive Publication Date: 2011-10-05
天津市天水环保设计工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are still some technical defects in the existing air-lift push-flow three-dimensional circulation integrally built oxidation ditch: (1) The overall flow rate is large
However, the high flow rate of the oxidation ditch under the condition of no sedimentation needs to consume a certain amount of hydraulic push flow energy, which is the main reason for the high energy consumption of the current oxidation ditch.
(2) The denitrification process is not complete, and the effect of nitrogen and phosphorus removal is not good
(3) The solid-liquid separator has poor ability to resist sludge expansion
Under normal circumstances, better solid-liquid separation effect can be obtained when the quality of activated sludge is relatively good. Severe floating mud phenomenon affects the quality of the effluent
In addition, the structure of the existing solid-liquid separator is complicated, and the structure and component materials such as metal and plastic are easily damaged, and the maintenance cost is high.
(4) The solid-liquid separation zone in the existing oxidation ditch is set at the end of the aerobic zone and close to the front wall of the oxidation ditch. Because it is in the static zone where the liquid flow turns, it is not conducive to sludge discharge

Method used

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  • Strip-type funneling solid-liquid separator and gas lifting pulsation push flowing oxidation ditch thereof
  • Strip-type funneling solid-liquid separator and gas lifting pulsation push flowing oxidation ditch thereof
  • Strip-type funneling solid-liquid separator and gas lifting pulsation push flowing oxidation ditch thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 Shown is a strip funnel-type solid-liquid separator 2, comprising a vertical end wall that is vertically connected between the walls on both sides of the oxidation ditch 1 and surrounds the clarification zone, separation zone and sedimentation zone that form the solid-liquid separation zone. It is characterized in that the above-mentioned vertical end wall includes a front end wall 22 and a rear end wall 21 parallel to it, which is close to the front end wall. The upper part of the outer side of the wall 22 is provided with a strip-shaped water collection tank 23 vertically connected between the two sides of the oxidation ditch. The water outlet 221 of the water collection weir communicates with the sump 23 provided with the drain 26; the sump 23 is a square cross-section groove. A plurality of strip-shaped overcurrent troughs 28 are interlaced with the water collection weir 27 and arranged in parallel, one end of which is the water inlet 211 protruding throug...

Embodiment 2a

[0028] Figure 2 ~ Figure 3 Shown is an air-lift pulsating plug-flow three-dimensional circulation oxidation ditch 1 that adopts the strip-shaped funnel-type solid-liquid separator of Embodiment 1, including an anoxic zone 16 and an air-lift well that is provided with a microporous aerator group 4 Oxygen zone 14, aerobic zone 13, solid-liquid separation zone 12, raw water inlet pipe, drain pipe and mud discharge pipe, wherein, in the middle and lower part of the oxidation ditch 1, a channel is set to divide the oxidation ditch into upper and lower layers and A horizontal partition 7 with a distance between the front end and the front wall 18 of the oxidation ditch, and a distance between the rear end and the rear wall 15 of the oxidation ditch, the above-mentioned aerobic zone 13 is set in the upper channel, and the above-mentioned anoxic zone 16 is set in the lower channel; its characteristics The rear end of the above-mentioned horizontal partition 7 is connected to the incl...

Embodiment 2b

[0036] In this embodiment, the solid-liquid separator 2 of the air-lift pulsating plug-flow type three-dimensional circulation oxidation ditch is provided with 9 strip-shaped overflow tanks 28, 10 water-receiving weirs 27, and 5 parallel-connected strip-shaped funnels 25, The angle between the two shaped plates is 90°, and the distance between the bottom edges of the two shaped plates is 15cm. The angle between the inclined diversion wall 3 and the horizontal partition 7 is 120°; five vertical diversion wall sections 6 are arranged at the bottom of the horizontal partition 7 .

[0037] The amount of treated raw water (sewage) is 84m 3 / h, the total air supply volume is 2m 3 / min, the air supply volume of the continuous air supply microporous aerator group 41 is 1.6m 3 / min, the air supply volume of the intermittent air supply microporous aerator group 42 is 0.4m 3 / min, the microporous aerator group 42 is turned on for 7 minutes at intervals of 50 minutes.

[0038] This em...

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Abstract

The invention relates to a strip-type funneling solid-liquid separator and a gas lifting pulsation push flowing stereo circulating oxidation ditch thereof; a mud settling replacement component of the strip-type funneling solid-liquid separator is that: a plurality of strip-type funnels connected in parallel are vertically fixed on a front end wall and a rear end wall to form a strip-type funnel set, and the strip-type funnel is formed by that bottom edges of the two strip-type plates are inclined outwards systematically at interval and the end parts thereof are closed on the front end wall and the rear end wall; the gas lifting pulsation push flowing stereo circulating oxidation ditch adopts a strip-type funneling solid-liquid separator, a fine bubble aerator group comprises continuous and intermittent air supplying fine bubble aerator groups; a transition anoxic zone is arranged at the front end of the oxidation ditch, and a solid-liquid separation area is arranged between an aerobiczone and the transition anoxic zone; the strip-type funneling solid-liquid separator has the advantages of achieving the purposes of further saving enrgy, reducing occupied area, reducing equipment volume, simplifying operation, reducing building and operation cost on the premise of ensuring good solid-liquid separation effect and good water-discharging quality.

Description

technical field [0001] The invention relates to sewage and waste water treatment facilities, in particular to a strip-shaped funnel-type solid-liquid separator and an air-lift pulsating plug-flow three-dimensional circulation oxidation ditch using the solid-liquid separator. Background technique [0002] Oxidation ditch is a time-delayed aerated activated sludge water treatment process with complete mixing and integral plug-flow hydraulic characteristics. Sewage, waste water and activated sludge are mixed and circulated in a closed ditch-like channel. Due to its unique hydraulic characteristics of "closed circulation flow" and the characteristics of longer sludge age and lower organic load, it has good effluent quality, strong impact resistance, stable operation, simple process, easy maintenance, and sludge discharge. The water treatment process with low water consumption, direct dehydration and low one-time construction investment and operation cost has been widely used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/12C02F1/52
CPCY02W10/10
Inventor 居文钟李士荣刘永孙贻超卢学强邓小文李永健贾晓玉李然叶凤钗杨健张悦王超
Owner 天津市天水环保设计工程有限公司
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