CN205473187U - Small -size integrated domestic sewage treatment equipment - Google Patents

Abstract

The utility model relates to a sewage treatment device technical field, concretely relates to small -size integrated domestic sewage treatment equipment. The utility model provides a small -size integrated domestic sewage treatment equipment, including the selection district that is equipped with air stripping sewage inlet tube, select the district both sides to be equipped with anoxic zone and equipment warehouse, anoxic zone one side order has been equipped with the oxygen district, the anaerobism district, the sedimentation tank, the good oxygen digestion tank of rapid filtration pond and mud, be equipped with disinfection water outlet device on the rapid filtration pond, equipment warehouse is equipped with the air -blower of pressure boost, anoxic zone and anaerobism district are equipped with through air stripping internal reflux ware, anaerobism district and sedimentation tank are equipped with air stripping exteenal reflux ware, the good oxygen digestion tank of rapid filtration pond and mud is equipped with and arranges mud backward flow ware through the air stripping, the good oxygen digestion tank of mud carries out the supernatant backward flow. The utility model discloses the installation criteria is high, the running cost is low, the operation maintenance is simple, and wastewater treatment process has optimized the cell body structure, has foundd biochemical best reaction condition, and it is active to have increased activated sludge, improves sewage treatment efficiency, has reached energy saving and emission reduction's purpose.

Description

Small integrated domestic sewage treatment equipment

technical field

The utility model relates to the technical field of sewage treatment equipment, in particular to small integrated domestic sewage treatment equipment.

Background technique

In the prior art, Chinese patent CN102874925A discloses a sewage biochemical processor, including a box body, the interior of the box body is filled with biological treatment medium (1), and the bottom wall of the box body is provided with a plurality of through holes (2 ), at least one side wall of the box is provided with a ventilation pipe (3) communicating with the inside of the box and extending to the outside of the box. The patent also discloses a sewage biochemical processor group, which comprises a plurality of sewage biochemical processors stacked in the height direction. In the above sewage biochemical processor, sewage flows into the tank from the upper part of the tank, and is treated by the biochemical treatment medium inside the tank. The oxygen needed, the sewage is treated and flows out from the through hole on the bottom wall of the box. However, the structure of this patent is unreasonable and cannot fully solve the following problems:

(1) The design standard of existing technology is low

At present, the effluent standards of small-scale domestic sewage treatment facilities are mostly the first-level A/B standards of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), and it is difficult to meet the standards stably. Beijing, Tianjin and other places have begun to require to meet local standards, effluent CODcr≤30mg/L, BOD5≤6mg/L, NH ₄ + ^-N≤1.5 (2.5)mg/L, TN≤15mg/L, TP≤0.3mg /L, SS≤5mg/L The effluent water quality standard is getting higher and higher, and some areas also require the use of reclaimed water, so the existing process can no longer meet the high standard effluent water quality requirements;

(2) The operating cost of existing technology is high

The existing commonly used small-scale integrated sewage treatment main processes include: contact oxidation, A/O process, MBR, etc. Stirring, aeration, lifting, backflow, sludge discharge, etc. have high power consumption and chemical consumption, resulting in high operating costs. High, the cost of MBR and its improved membrane technology is even higher, which cannot meet the requirements of energy saving and emission reduction;

(3) The existing technology occupies a large area

At present, ecological treatment methods that imitate natural degradation: artificial wetlands, biological ponds and other processes require an area of about 20-30m ² to treat a ton of water, and activated sludge A/O and its improved process require an area of about 2-3m to treat a ton of water ^2. The area required for contact oxidation or SBR process to treat a ton of water is about 1-1.5m ² , and the area required for MBR process to treat a ton of water is about 0.5-1.0m ² . further optimization;

(4) There are many and miscellaneous existing technical equipment

The existing technological process is generally longer and involves more equipment, such as submersible sewage pumps, agitators, return pumps, sludge pumps, blowers, filters (membranes), dosing facilities, fillers, etc., which increase investment costs and Difficulty in operation, maintenance and management. It is only a scaled-down version of a large sewage plant. It is not suitable for rural areas and other areas with relatively poor management and backward technology, so that a large number of treatment facilities are left idle;

(5) The investment cost of the existing technology is high

At present, the investment cost per ton of water for integrated equipment is about 7,000 yuan, and the smaller the scale, the higher the unit cost. The main reason is the size of the equipment, the number of equipment, and the cost of the equipment itself. It is urgent to reduce production costs and seek simple and cost-effective devices. ;

(6) The processing scale of the existing technology is limited

The existing domestic sewage treatment process is limited by manufacturing, transportation, land occupation, etc., and the treatment capacity is low. However, it is also limited by the structure and size of the equipment. If the treatment capacity is less than 10m ³ /d<scale<500m ³ /d, Incapable of processing and production, so that the scope of use is limited, the phenomenon of "big horse-drawn carts" is more serious, and when some processes (membranes) have no water inflow for a short period of time, the system is prone to collapse, and the activated sludge needs to be domesticated again;

(7) The treatment effect is poor when the prior art is low temperature

In the cold northern regions, the existing integrated treatment equipment generally needs to take insulation measures (outside the house) in winter, so that the sludge activity cannot be guaranteed and the system operation stability is poor;

(8) Poor hydraulic conditions in existing technologies;

The hydraulic flow state of the existing process is mostly plug-flow or complete mixing, which is relatively simple, but the size of the integrated treatment equipment is small, and it is easy to produce short flow or local mud accumulation. The sewage cannot fully contact with the organisms, the reaction rate is low, and the volume The utilization rate is also low, and the pool structure and hydraulic flow state need to be optimized.

Utility model content

In order to overcome the defects in the prior art, the utility model provides small-scale integrated domestic sewage treatment equipment, which has higher construction standards than the prior art, smaller floor space, low operating cost, low investment per ton of water, simple operation and maintenance, and advanced sewage treatment process. The structure of the pool is optimized, the best biochemical reaction conditions are created, the activity of activated sludge is increased, the efficiency of sewage treatment is improved, and the purpose of energy saving and emission reduction is achieved.

The utility model is realized through the following technical scheme: small-scale integrated domestic sewage treatment equipment, including a selection area provided with an air-lift sewage inlet pipe, an anoxic area and an equipment warehouse are arranged on both sides of the selection area, and the anoxic One side of the area is provided with an aerobic area, an anaerobic area, a sedimentation tank, a quick filter tank and an aerobic sludge digester in sequence. The quick filter tank is provided with a disinfection outlet, and the equipment warehouse is provided with a blower. An internal reflux device through air lift is provided between the anoxic zone and the anaerobic zone, an external reflux device through air lift is provided between the anaerobic zone and the sedimentation tank, and an external reflux device through air lift is provided between the fast filter tank and the sludge aerobic digester. There is a reflux device for sludge discharge through air lift, and the sludge aerobic digestion tank performs supernatant reflux.

Further, the air-lift internal reflux device, the air-lift external reflux device and the air-lift sludge discharge reflux device all include the air-lift reflux device, and the air-lift reflux device includes an input pipe and a blower through a blowing pipe and an air inlet. A connected air pipe, the air pipe is connected with one end of the riser pipe, and the other end of the riser pipe is connected with the discharge pipe.

Further, irregular aerators are respectively provided on the fast filter, the anaerobic zone, and the anoxic zone.

Further, several staggered folded plates are provided on the two opposite side walls of the oxygen-deficient zone.

Further, the flaps arranged on any one side wall on the same side are parallel to each other and inclined to the side wall.

Further, vertical flaps are provided on the side walls of the anaerobic zone.

Further, the blower is provided with a supercharging device.

Further, the blower is provided with a heat conductor.

Compared with the prior art, the small-scale integrated domestic sewage treatment equipment described in the utility model has the advantages of:

(1) Strong impact load resistance: high sludge concentration, twice as high as that of conventional activated sludge; activated sludge can adapt to continuous water cut-off conditions for 2 months;

(2) Small footprint: only 1/3 to 1/2 of traditional crafts;

(3) High mass transfer rate: using micron aerator, the reaction rate is increased by 100 times;

(4) Low operating cost: the operating cost is 20% to 30% lower than the traditional process;

(5) Low mud production: only 10% of the traditional process;

(6) Low investment cost: the investment is 10% to 15% lower than traditional crafts.

Description of drawings

Fig. 1 is the sectional view of the process structure of the small-scale integrated domestic sewage treatment equipment described in the utility model;

Fig. 2 is the structural representation of the small integrated domestic sewage treatment equipment described in the utility model;

Fig. 3 is a structural diagram of the air-lift reflux device in the small-scale integrated domestic sewage treatment equipment of the present invention.

reference sign

1-gas lift sewage inlet pipe, 2-selection zone, 3-anoxic zone, 4-anaerobic zone, 5-aerobic zone, 6-equipment warehouse, 7-sedimentation tank, 8-quick filter tank, 9-disinfection Water outlet, 10-sludge aerobic digester, 11-air lift external reflux device, 12-air lift internal reflux device, 13-supernatant liquid reflux, 14-air lift sludge discharge reflux device, 15-blower, 16- Heat conductor, 17-folding plate, 18-aerator, 19-blast pipe, T1-air lift reflux, T2-air inlet, T3-input pipe, T4-air pipe, T5-riser, T6-exhaust Tube.

The direction of the arrow in the figure is the flow direction of air, sewage or sludge.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

As shown in Figures 1, 2 and 3, the small-scale integrated domestic sewage treatment equipment provided by the utility model includes a selection area 2 provided with an air-lift sewage inlet pipe 1, and anoxic areas are respectively provided on both sides of the selection area 2 3 and the equipment warehouse 6, the one side of the anoxic zone 3 is provided with an aerobic zone 5, anaerobic zone 4, sedimentation tank 7, quick filter tank 8 and sludge aerobic digestion tank 10 in sequence, and the fast filter tank 8 A disinfection water outlet 9 is provided on the top, and the equipment compartment 6 is provided with a blower 15, and the blower 15 is provided with a pressurization device. Between described anoxic zone 3 and anaerobic zone 4, be provided with by air-lifting internal reflux device 12, between described anaerobic zone 4 and settling tank 7, be provided with by air-lifting external reflux device 11, described fast filter tank 8 and the sludge aerobic digester 10 is provided with an airlift sludge discharge reflux device 14, and the aerobic digester 10 is provided with a supernatant return flow 13, and the supernatant return flow 13 is refluxed by gravity. Described fast filter tank 8 and anaerobic zone 4, anoxic zone 3 are provided with irregular aerator 18 respectively, and anoxic zone 3 is respectively provided with irregular aerator 18 (not shown in the figure), described The opposite side walls of the anoxic zone 3 are provided with several staggered folded plates 17, the folded plates 17 arranged on any one side wall are parallel to each other and inclined with the side walls, the side walls of the anaerobic zone 4 A vertical folded plate 17 is provided on it, and the blower 15 is provided with a heat conductor 16 . In this embodiment, the air-lift internal reflux device 12, the air-lift external reflux device 11 and the air-lift sludge discharge reflux device 14 all include the air-lift reflux device T1, as shown in Figure 3, the air-lift reflux device T1 It includes an input pipe T3 and an air pipe T4 connected to the blower 15 and the air inlet T2 through the air blowing pipe 19. The air pipe T4 is connected to one end of the riser T5, and the other end of the riser T5 is connected to the discharge pipe T6.

The utility model is not limited to the above-mentioned embodiments. Without departing from the essential content of the utility model, any deformation, improvement and replacement conceivable by those skilled in the art all fall within the protection scope of the utility model.

Claims (8)

1. The most small-sized integrated domestic sewage treatment device, including being provided with the selection district (2) of air stripping sewage water inlet pipe (1), described Select district (2) both sides be provided with anoxic zone (3) and equipment compartment (6), described anoxic zone (3) side be sequentially with aerobic zone (5), Anaerobic zone (4), sedimentation tank (7), rapid filter (8) and sludge aerobic digester (10), described rapid filter (8) is provided with Sterilization water outlet device (9), it is characterised in that described equipment compartment (6) is provided with aerator (15), described anoxic zone (3) and detest It is provided with between oxygen district (4) by air stripping internal reflux device (12), is provided with logical between described anaerobic zone (4) and sedimentation tank (7) Cross air stripping exteenal reflux device (11), be provided with by air stripping spoil disposal between described rapid filter (8) and sludge aerobic digester (10) Return channel (14), described sludge aerobic digester (10) is provided with supernatant backflow (13).
2. The most small-sized integrated domestic sewage treatment device, it is characterised in that described air stripping internal reflux Device (12), air stripping exteenal reflux device (11) and air stripping spoil disposal return channel (14) all include described stripping reflux device (T1), institute State stripping reflux device (T1) and include input pipe (T3) and with aerator (15) by blast pipe (19) and air intlet (T2) The air hose (T4) connected, described air hose (T4) is connected with one end of riser (T5), described riser (T5) The other end is connected with discharge pipe (T6).
3. The most small-sized integrated domestic sewage treatment device, it is characterised in that described rapid filter (8) It is respectively equipped with irregular aerator (18) with on anaerobic zone (4), anoxic zone (3).
4. The most small-sized integrated domestic sewage treatment device, it is characterised in that described anoxic zone (3) Two relative sidewalls are provided with several flaps being crisscross arranged (17).
5. The most small-sized integrated domestic sewage treatment device, it is characterised in that on arbitrary homonymy sidewall The flap (17) arranged is parallel to each other and and sidewall slope.
6. The most small-sized integrated domestic sewage treatment device, it is characterised in that described anaerobic zone (4) Sidewall be provided with vertical flap (17).
7. The most small-sized integrated domestic sewage treatment device, it is characterised in that described aerator (15) It is provided with pressurizer.
8. The most small-sized integrated domestic sewage treatment device, it is characterised in that described aerator (15) It is provided with heat conductor (16).