CN1243671C

CN1243671C - Sewage treatment equipment

Info

Publication number: CN1243671C
Application number: CNB200310107015XA
Authority: CN
Inventors: 林荣忱; 商中铭; 林文波
Original assignee: TIANJIN HUITONG ENVIRONMENT PROTECTION DEVELOPMENT CO LTD
Current assignee: TIANJIN HUITONG ENVIRONMENT PROTECTION DEVELOPMENT CO LTD
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2006-03-01
Anticipated expiration: 2023-11-14
Also published as: CN1544362A

Abstract

The present invention discloses a device for sewage treatment, which comprises a tank body and fillers, wherein a water inlet pipe, an air inlet pipe, a water outlet pipe, a sampling pipe and a water collecting tank are arranged on the tank body of which the upper part is provided with a sieve plate supporting frame and a sieve plate, and a sand remover is arranged on the lower part of the tank body. A sand discharging pipe is arranged on the bottom of the sand remover, and the water inlet pipe is arranged on the lower part of the tank body and is an annular pipe; a water inlet spray nozzle is arranged on the water inlet pipe, and a flushing water distributing pipe is arranged in the middle of the tank body. A water distributing spray nozzle is arranged on the flushing water distributing pipe, and a discharge pipe for excess sludge is arranged on the lower part of the flushing water distributing pipe. The present invention has the functions of sand deposition, primary deposition, acidified hydrolysis and biologic nitrogen removal, and also has the advantages of shortening technological processes, reducing land occupation areas, saving cost and enhancing water producing rate.

Description

Waste disposal plant

Technical field

The present invention relates to a kind of waste disposal plant.

Background technology

China State Environmental Protection Administration; " the sewage disposal pollutant emission standard is filled out in the city " GB18918 of State Administration for Quality Supervision and Inspection and Quarantine's issue---2002; require town sewage plant as reuse water and the water that enters sealing or semiclosed waters, need denitrogenation processing.

At present, there are many kinds of denitrification process to be used for sewage disposal, wherein the BIOSTYR biological denitrification process by the exploitation of French OTV S.A. is used for sewage treatment process, anoxic pond and Aerobic Pond in the traditional technology that it will generally use come together in one, it is the submerged biological filter, make the reactor cubic capacity little, reaction efficiency improves and floor space reduces, but in the BIOSTYR biological denitrification process, sewage will pass through settling pit and preliminary sedimentation tank earlier, after solid dirt removed, can make sewage enter the submerged biological filter.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, a kind of waste disposal plant is provided, it integrates desanding, acidication mud reaches the functions such as biological denitrificaion to sewage, improves the useful volume utilization ratio of device.

Technical scheme of the present invention is summarized as follows:

A kind of waste disposal plant, comprise the pond body, filler, the pond body is provided with water inlet pipe, inlet pipe, rising pipe, stopple coupon, water leg, be provided with the sieve plate support on the top of pond body, sieve plate, the bottom of described pond body is provided with sand separator, the bottom of sand separator is provided with the sediment outflow pipe, water inlet pipe is arranged on the bottom of described pond body, water inlet pipe is a loop pipe, water inlet pipe is provided with into water nozzle, the middle part of pond body is provided with the wash-down water water distributor, the wash-down water water distributor is provided with the cloth water spouting nozzle, the excess sludge vent pipe is arranged on the below of wash-down water water distributor, and each unit order from the bottom to top is followed successively by the sediment outflow pipe, sand separator, water inlet pipe, the excess sludge vent pipe, stopple coupon, the wash-down water water distributor, inlet pipe, filler, the sieve plate support, sieve plate, water leg, rising pipe.

The wash-down water water distributor is a ring-type or one of dendritic, and cloth water spouting nozzle and wash-down water water distribution tube wall tangent line are 30～60 degree angles and are provided with down horizontal by 20～50 degree angles.

Cloth water spouting nozzle and wash-down water water distribution tube wall tangent line are to be miter angle and to be set under the angles suitable horizontal by 30 degree.

The water inlet nozzle is 30～60 degree angles with water inlet tube wall tangent line and is provided with on 20～50 degree angles.

Water inlet nozzle and water inlet tube wall tangent line are to be miter angle and to be set on the 30 degree angles suitable.

Advantage of the present invention:

1. the present invention has sand setting, first heavy function, and technical process is shortened;

2. the present invention is by acidification, but the larger molecular organics of difficult degradation is hydrolyzed to the small organic molecule of aerobic treatment, improves the biodegradability of sewage, and floor space reduces;

3. the present invention adopts the low-pressure aeration system with the BIOSTYR biological denitrification process than only, has saved cost;

4. establish sludge thickener more in addition, except that excess sludge is concentrated, store the mud usefulness in acidication district during also as this reaction rinse, device useful volume utilization ratio brings up to 100% by 70% of BIOSTYR, and cost reduces by 30%.

5. the present invention has changed backwashing manner, and the flush discharge amount is 1/2 of a BIOSTYR technology, has improved producing water ratio;

6. the present invention adopts nozzle tangent line water distribution, and water inlet makes sewage form eddy flow in bottom of the present invention along the ejection of reactor tangent line, helps desanding, and sedimentary sand is stored in the sand setting district, discharges before recoil.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of wash-down water water distributor of the present invention;

Fig. 3 is a wash-down water water distributor I-I sectional view of the present invention;

Fig. 4 is the structural representation of water inlet pipe of the present invention;

Fig. 5 is a water inlet pipe I-I sectional view of the present invention;

Fig. 6 is a water inlet pipe structure of nozzle synoptic diagram of the present invention.

Embodiment

A kind of waste disposal plant, comprise pond body 1, be provided with filler 15 in the pond body 1, be provided with water inlet pipe 8 in the bottom of pond body 1, be provided with inlet pipe 6 at the middle part of pond body 1, be provided with water leg 2 on the top of pond body 1, the bottom of water leg 2 is provided with rising pipe 5, be provided with stopple coupon 12 at the middle part of pond body 1, sieve plate support 14, sieve plate 4 is arranged on the top of pond body 1, the bottom of pond body 1 is provided with sand separator 3, the bottom of sand separator 3 is provided with sediment outflow pipe 9, and water inlet pipe 8 is a loop pipe, and water inlet pipe 8 is provided with into water nozzle 16, the middle part of pond body 1 is provided with wash-down water water distributor 7, wash-down water water distributor 7 is provided with cloth water spouting nozzle 17, and excess sludge vent pipe 11 is arranged on the below of wash-down water water distributor 7, if equipment is bigger, in inlet pipe 6, wash-down water water distributor 7, be provided with support below excess sludge vent pipe 11 and the water inlet pipe 8, supporting each pipe.

Wash-down water water distributor 7 is a ring-type or dendritic, and cloth water spouting nozzle 17 is 30～60 degree angles with wash-down water water distributor 7 tube wall tangent lines and is provided with down horizontal by 20～50 degree angles.

Cloth water spouting nozzle 17 and wash-down water water distributor 7 tube wall tangent lines are to be miter angle and to be set under the 30 degree angles suitable.

Water inlet nozzle 16 is 30～60 degree angles with water inlet pipe 8 tube wall tangent lines and is provided with on 20～50 degree angles.

Water inlet nozzle 16 and water inlet pipe 8 tube wall tangent lines are to be miter angle and to be set on the 30 degree angles suitable.

Waste disposal plant of the present invention is according to inlet pipe, towards the position of Xian Shui water distributor and water inlet pipe, the present invention is divided into several districts on function, as: water inlet pipe is following to be the sand setting district, be the acidication district between water inlet pipe and the wash-down water water distributor, it between wash-down water water distributor and the inlet pipe oxygen-starved area, inlet pipe is above to be aerobic zone, and sewage is subjected to different processing in different district of the present invention.

1. water distribution

Pending sewage is entered by water inlet pipe of the present invention, because the water inlet nozzle on the water inlet pipe makes sewage be the tangent line water distribution, sewage forms eddy flow in bottom of the present invention, helps desanding and water distribution uniformity; Sand setting of the present invention district and acidication district have replaced settling pit of the prior art and preliminary sedimentation tank.

2. the setting of filler

Filler among the present invention is the ring packing that a kind of particle diameter is little, shape is consistent, volume mass is than＜1, have very big specific surface area and higher detergent power, it is high to handle load, and mechanical property and physical and chemical performance are good, and be not easy to wear, the starting material of filler are taken from industrial raw material, but produce in situ processing, cost is low, 3～3.5 meters of packing layer thickness.

The present invention is because therefore the setting of filler has high biomass and very big specific surface area, and the concentration of oxygen is far above the aeration tank of activated sludge process in the unit volume, and the filler loss is minimum, hardly with changing.

3. biochemical reaction

Filler has adhered to a large amount of microorganisms as microorganism carrier on its huge surface-area, and in the effect of aerobic zone by the inlet pipe oxygen supply, the chemical oxygen demand (COD) in the sewage (COD), biological oxygen demand (BOD) reduce, and ammonia nitrogen then is oxidized to nitrate nitrogen.

Under nitrated/denitrifying situation, treat effluent refluxes, and recirculation water enters the pond body by the wash-down water water distributor, carries out anti-nitration reaction in the oxygen-starved area, and the nitrate nitrogen in the recirculation water is removed.

Because nitrated, anti-nitration reaction, the influence of being advanced the water water temperature is very big, thereby the water inlet water temperature will obviously influence biochemical reaction since in the pond microorganism be fixed on the filling carrier and (unlike active sludge, be suspended in the water), the biomass in its unit volume is very big, has improved processing efficiency.Reactor can be in normally operation more than 10 ℃, and effluent stream is the direction of compressible filler through the direction of filler simultaneously, rather than the direction of expansion filler, has strengthened the crown_interception to suspended matter, thereby has no longer needed settling tank.

4. reactor water outlet

The buoyant filler is blocked in the body of pond by top sieve plate, and water filtering cap is set on the sieve plate, because sieve plate only contacts with handling back water, has therefore avoided obstruction, simultaneously, owing to there is not filtrate above the sieve plate, is easy to safeguard.

5. back flushing

Along with suspended matter is trapped and biomembranous continuous growth, filler need regularly carry out back flushing, during recoil, earlier the bottom sand setting is drained, again the active dirt in the acidication district is entered the mud thickener of the sky of establishing in addition, at this moment, filler is positioned at the lower position of pond body, the wash-down water water distributor is positioned at above the filler, the cloth water spouting nozzle enters tank body with tangential direction, and filler is carried out the layering flushing, and is floating to Chi Ding until filler, the mud that sludge thickener is stored feeds back into hydrolysis area then, and water inlet operation excess sludge drains into sludge sump by the excess sludge vent pipe that is positioned at above the hydrolysis area then.

6. aeration

Reactor is selected a gas blower for use, as aerobic zone aeration source of the gas, adopts perforated pipe aerating regulation.

Owing to filled up closely knit filler in the device, therefore bubble arrives the distance of pond body water outlet than not having the filler duration more than 2 times, although the bubble of perforated pipe aerating regulation is bigger than the bubble of micro-pore aeration, but because the obstruction of filler and cut apart effect, make the bubble must be via arriving apparatus surface after the long period of filler slit, this moment, air pocket was divided into many small bubbles, thereby had improved the utilization ratio of oxygen greatly, had also just improved aeration efficient.

Claims

1. waste disposal plant, comprise the pond body, filler, described pond body is provided with water inlet pipe, inlet pipe, rising pipe, stopple coupon, water leg, be provided with the sieve plate support on the top of pond body, sieve plate, the bottom that it is characterized in that described pond body is provided with sand separator, the bottom of described sand separator is provided with the sediment outflow pipe, described water inlet pipe is arranged on the bottom of described pond body, described water inlet pipe is a loop pipe, described water inlet pipe is provided with into water nozzle, the middle part of described pond body is provided with the wash-down water water distributor, described wash-down water water distributor is provided with the cloth water spouting nozzle, the excess sludge vent pipe is arranged on the below of described wash-down water water distributor, and each unit order from the bottom to top is followed successively by the sediment outflow pipe, sand separator, water inlet pipe, the excess sludge vent pipe, stopple coupon, the wash-down water water distributor, inlet pipe, filler, the sieve plate support, sieve plate, water leg, rising pipe.

2. waste disposal plant according to claim 1 is characterized in that described wash-down water water distributor is a ring-type or one of dendritic, and described cloth water spouting nozzle and described wash-down water water distribution tube wall tangent line are 30～60 degree and are provided with down horizontal by 20～50 degree angles.

3. waste disposal plant according to claim 2 is characterized in that described cloth water spouting nozzle and described wash-down water water distribution tube wall tangent line are miter angle and spend angles setting down horizontal by 30.

4. waste disposal plant according to claim 1 is characterized in that described water inlet nozzle and described water inlet tube wall tangent line are 30～60 degree angles and are provided with on the angles horizontal by 20～50 degree.

5. waste disposal plant according to claim 4 is characterized in that described water inlet nozzle and described water inlet tube wall tangent line are miter angle and are provided with on the angles horizontal by 30 degree.