CN211999347U - Improved device of domestic sewage treatment device - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment auxiliary devices, in particular to a modification device of a domestic sewage treatment device, which can ensure stable operation of equipment and improve the use reliability; comprises a primary sedimentation tank, an A-level biochemical tank, an O-level biochemical tank, a secondary sedimentation tank, a disinfection device, a sludge tank and a fan room.

Description

Improved device of domestic sewage treatment device

Technical Field

The utility model relates to a technical field of sewage treatment auxiliary device especially relates to a domestic sewage treatment plant's transformation device.

Background

The company adopts buried integrated domestic sewage treatment equipment, and is a domestic sewage treatment device which mainly adopts an A/O biochemical process and integrates the processes of biodegradation sewage sedimentation, oxidation disinfection and the like. The device adopts the principle of a biochemical method to treat domestic sewage. The aerobic bacteria adsorb organic matters in the sewage, air and oxygen in the sewage to carry out biological oxidation and decomposition, one part generates carbon dioxide, water and inorganic matters, the other part generates a new biological film with certain activity, and pollutants in the sewage are continuously degraded. Sewage sequentially enters the tank A and the tank O through the grating. In an O tank. Aerobic bacteria are attached to the surface of the filler to grow and form a biological membrane, under the condition of oxygenation, sewage flows through the filler at a certain flow rate to be contacted with the biological membrane, organic matters in the sewage are degraded, meanwhile, the aerobic bacteria in the biological membrane are further propagated, the sewage after aerobic treatment enters a sedimentation tank for sedimentation, clarified water is disinfected, and the treated water reaching the standard is discharged to a reservoir. The A/O process has the advantages that: energy consumption is saved: the oxygen required for biological nitrification and denitrification mainly comprises the oxygen required in the process of digestion, endogenous respiration and degradation of organic matters. The A/O process degrades organic matters while being out of stock, greatly reduces oxygen demand and is an energy-saving biological treatment system. The sludge settling property is good: in order to maintain higher digestibility, the reaction retention time is long in a common activated sludge method, microorganism endogenous respiration can occur, the sludge growth rate is low, the residual sludge amount is small, the digestion process is high, and the sedimentation performance is good.

The existing domestic sewage treatment equipment often prevents water from flowing out of an outlet pipe due to air in a pipeline after running, and the manhole overflows on a primary sedimentation tank, an A-level biochemical tank or an O-level biochemical tank, so that the equipment cannot run, and the use reliability of the equipment is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a domestic sewage treatment device transformation project which can make the equipment operate stably and improve the use reliability.

The utility model discloses a domestic sewage treatment plant reforms transform project, including just sinking pond, A level biochemical pond, O level biochemical pond, two heavy ponds, disinfection pond, degassing unit, sludge impoundment and fan room.

Compared with the prior art, the beneficial effects of the utility model are that: after the transformation, the output of a single set is increased by 7 tons/hour, the equipment is stable to operate, and the phenomena of overflow and gas storage do not occur after the equipment operates for half a year. A manual sludge discharge system is added, and aged sludge is timely and thoroughly discharged after periodic sludge discharge is carried out, so that suspended matters in the discharged water are ensured to reach the standard. Not only ensures the timely recovery treatment and reutilization of the domestic wastewater of the whole plant, but also saves a large amount of funds for the company: 12 ten thousand tons of waste water are recycled every year, and more than 20 ten thousand yuan of industrial water cost is saved for companies; the cost of the newly added domestic sewage treatment device is saved for the company by 36 ten thousand yuan. And the risk of wastewater discharge is eliminated, and by additionally arranging a sludge discharge system for the A-level biochemical pool and the O-level biochemical pool and simultaneously reforming each section of water outlet system, the single set output reaches 12 tons/hour, and the phenomena of equipment overflow and the like are eliminated. The pipeline from the primary sedimentation tank to the A-level biochemical tank, the pipeline from the O-level biochemical tank to the secondary sedimentation tank is completely replaced by a DN100 pipeline from a DN50 pipeline, and a DN50 sludge discharge system is added at the lower parts of the O-level biochemical tank and the secondary sedimentation tank to discharge sludge in time, thereby ensuring that the index of the suspended matters in the effluent reaches the standard.

Drawings

FIG. 1 is a process flow diagram of the present invention;

in the drawings, the reference numbers: 1. a regulating tank; 2. a primary settling zone; 3. an anaerobic zone; 4. an aerobic zone; 5. A second settling zone; 6. a sterile area; 7. a sludge tank; 8. a fan.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figure 1, the utility model discloses a domestic sewage treatment plant transformation project, including just sinking pond, A level biochemical pond, O level biochemical pond, two heavy ponds, disinfection pond, degassing unit, sludge impoundment and fan room.

Example (b):

firstly sinking a pool: the primary sedimentation tank is a vertical flow sedimentation tank, the ascending flow velocity of the sewage in the sedimentation tank is 0.3-0.4 mm/s, and the settled sludge is lifted to a sludge tank.

A-level biochemical pool: the anoxic tank is arranged for denitrification treatment, YDT type three-dimensional elastic filler is arranged in the tank and used as a carrier of denitrifying bacteria, nitrate-state ammonia and subacid-state oxygen in nitrified liquid are reduced into nitrogen under the action of the denitrifying bacteria to achieve the aim of denitrification, the effective retention time of the anoxic tank is 2.5-3.5 hours, and the dissolved oxygen is controlled to be less than or equal to 0.5 mg/L.

The O-grade biochemical pool: sewage flows to the contact tank by itself and carries out biochemical treatment, and the contact tank divide into the tertiary, and dwell time is 8h, (strenghthened type equipment contact oxidation time can reach 8 ~ 12h) filler is novel elastic filler, easy conjunctiva, unblock, and contact oxidation pond air-water ratio is 15: about 1.

Fourthly, sinking the pond for the second time: the biochemical sewage flows into a secondary sedimentation tank, the secondary sedimentation tank adopts vertical sedimentation, the surface load is less than 1.0m3/m2.h, and the discharged sludge is lifted to a sludge tank.

The sterilizing tank and the sterilizing device: the disinfection tank is as per the standard: the standard of TJ14-74 is not less than 30 minutes, if the hospital sewage exists, the retention time of the disinfection tank can be increased to 1-1.5 hours.

The disinfection adopts a disinfection mode of solid chlorine sheet contact dissolution, the disinfection device can continuously change the dosage according to the water yield, the purposes of adding more chemicals in more water and adding less chemicals in less water are achieved, and other disinfection devices can be additionally prepared.

(6) A sludge tank: and all the sludge in the primary sedimentation tank and the secondary sedimentation tank is lifted intoA sludge tank of the WSZ-A by air for aerobic digestion. And returning clear liquid in the sludge tank to the heat exchange oxidation tank for retreatment. Residual sludge after digestion is little, and the residual sludge is generally cleaned once in 1 to 2 years. The cleaning method adopts a dung suction truck to extend into the bottom of the sludge from an inspection hole of the sludge tank, and the dung suction truck can be used for sucking and transporting the dung outwards.

(7) Fan room, fan: the equipment fan is arranged above the disinfection tank, the inlet adopts double-layer sound insulation, and the air inlet is provided with a silencer and a fan filter, so that no noise is produced during operation. The fan adopts two rotary fans, and can automatically and alternately operate. The service life of a single fan is about 30000 hours.

The A/O process has the advantages that: energy consumption is saved: the oxygen required for biological nitrification and denitrification mainly comprises the oxygen required in the process of digestion, endogenous respiration and degradation of organic matters. The A/O process degrades organic matters while being out of stock, greatly reduces oxygen demand and is an energy-saving biological treatment system.

The sludge settling property is good: in order to maintain higher digestibility, the reaction retention time is long in a common activated sludge method, microorganism endogenous respiration can occur, the sludge growth rate is low, the residual sludge amount is small, the digestion process is high, and the sedimentation performance is good.

The specific modification scheme is as follows: the pipeline from the primary sedimentation tank to the A-level biochemical tank, the pipeline from the O-level biochemical tank to the secondary sedimentation tank is completely replaced by a DN100 pipeline from a DN50 pipeline, and a DN50 sludge discharge system is added at the lower parts of the O-level biochemical tank and the secondary sedimentation tank to discharge sludge in time, thereby ensuring that the index of the suspended matters in the effluent reaches the standard.

The utility model discloses a domestic sewage treatment plant reforms transform project, above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical type to the concrete structure, model and the coefficient index of all its parts are its from taking the technique, as long as can reach all can implement of its beneficial effect, so do not add at many and give unnecessary details.

The transformation project of the domestic sewage treatment device of the utility model, under the condition of not being explained reversely, "upper, lower, left, right, front, back, inner, outer, vertical and horizontal" and other directional words included in the term only represent the direction of the term under the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the numerical terms "first," "second," and "third," etc. do not denote any particular quantity or order, but rather are used to distinguish one from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (1)

1. A transformation device of a domestic sewage treatment device is characterized by comprising a primary sedimentation tank, an A-level biochemical tank, an O-level biochemical tank, a secondary sedimentation tank, a disinfection device, a sludge tank and a fan room;

the fan room is characterized in that an equipment fan is arranged above the disinfection tank, a double-layer sound insulation is adopted at an inlet, a silencer and a fan filter are arranged at an air inlet, and the fan adopts two rotary fans which can automatically and alternately operate.

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