CN213446434U - SBR reactor without decanter - Google Patents

Abstract

The utility model discloses a need not to strain SBR reactor of hydrophone, including the retort body, the top of retort body is provided with the inlet tube, and its bottom is provided with aeration equipment, its characterized in that: at least two drain pipes are arranged on the side wall of the reaction tank body from top to bottom, wherein the lowest drain pipe is positioned at a position close to the lowest water level, a drain electric valve is arranged on each drain pipe, a slag discharge pipe is arranged on the drain pipe at the front side of a water inlet of each drain electric valve, and a slag discharge electromagnetic valve is arranged on each slag discharge pipe. The method can realize the drainage function without a decanter, reduces the idle time of the reactor, and has the characteristics of investment saving, low operating cost, simple and convenient installation, small equipment, good maintenance and the like compared with the traditional SBR reactor.

Description

SBR reactor without decanter

Technical Field

The utility model relates to a need not to strain SBR reactor of hydrophone belongs to water treatment facility field.

Background

With the continuous development of agriculture and industry in China, various industries and cities are rapidly developed, and meanwhile, the problem of great pollution is brought to the environment which people can endure to live. The waste water is directly discharged into the water body without being treated, which not only influences the urban environment, but also finally influences the water quality of rivers. Along with the development of cities and towns, the increase of the amount of wastewater seriously affects the quality of life of residents in the cities and towns and also brings very adverse effect on the ecological environment which we rely on for survival.

SBR is a short term of sequence Batch Reactor Activated Sludge Process (Sequencing Batch Reactor Activated Sludge Process), is an Activated Sludge sewage treatment technology which operates according to an intermittent aeration mode, and is also called a sequence Batch Activated Sludge Process.

The SBR working process is as follows: firstly, sewage is added into a reactor, aeration is started after the reactor is filled with water, the aeration is stopped after organic matters in the sewage meet the discharge requirement through biodegradation, and supernatant is discharged after precipitation for a certain time. The above process can be summarized as follows: the method comprises the following steps of water inlet, aeration reaction, precipitation, water discharge and entering the next working period, wherein the working period can also be called as a water inlet stage, substrate adding, reaction stage, substrate degradation, precipitation stage, solid-liquid separation, water discharge stage, supernatant discharge and standby stage, and activity recovery.

1. A water inlet stage:

refers to the period of time from the beginning of the water feed to the reactor to the time the maximum reactor volume is reached. The time used in the water inlet stage is determined according to the actual water discharge condition and equipment conditions, and in the water inlet stage, the aeration tank plays a role in balancing the quality and quantity of sewage to a certain extent. During this period, three cases can be distinguished: aeration (aerobic reaction), stirring (anaerobic reaction) and standing. In the case of aeration, the organic matter begins to be oxidized in large amount in the water inlet process, and in the case of stirring, the aerobic reaction is inhibited. The three modes are non-limited aeration, semi-limited aeration and limited aeration. When in operation, water can be fed in by adopting non-limited aeration, semi-limited aeration and limited aeration modes according to the growth characteristics of different microorganisms, the characteristics of wastewater and the treatment target to be achieved. By controlling the environment of the water inlet stage, various treatment functions can be completed under the condition that the reactor is not changed.

2. A reaction stage:

is the main stage of SBR where contaminants are removed by microbial degradation. According to the different requirements of sewage treatment, such as only removing organic carbon or simultaneously dechlorinating old phosphorus, the corresponding technical parameters can be adjusted, and the time of the reaction stage and whether a continuous aeration mode is adopted can be determined according to the specific conditions of the water quality of raw water and the discharge standard.

3. A precipitation stage:

the purpose of the precipitation is solid-liquid separation, which is equivalent to the function of a secondary sedimentation tank of the traditional activated sludge method. Stopping aeration and stirring to make the mixed solution in a static state, completing mud-water separation, and having good static precipitation effect. The supernatant separated after precipitation can be discharged, and the purpose of precipitation is solid-liquid separation and separation of sludge floc and supernatant. This process is more efficient in SBR systems than in medium efficiency due to the complete quiescence in the reactor at the time of precipitation. The settling process is generally controlled by time, and the settling time is between 0.5 and 1 hour, and even can reach 2 hours, so as to facilitate the next drainage process.

4. A drainage stage:

the aim is to discharge the clarified liquid of old sludge from the reactor, up to the lowest level at the beginning of the cycle, which level still has a certain protective height from the sludge blanket. Most of the sludge settled at the bottom of the reactor is used as the return sludge of the next period, and the excess sludge can be discharged in the drainage stage and the standby stage. The SBR drainage is generally a decanter. The time taken for decanting is determined by the decanting capacity and generally does not affect the underlying sludge blanket. It is also possible to start draining at the same time as the sedimentation, although the decanting rate is controlled so as not to affect the sedimentation.

5. A standby stage:

the period from the precipitation to the start of the next cycle is referred to as a standby process. Stirring or aeration can be carried out according to the needs. In a multi-cell system, the purpose of the standby is to provide time for one reactor to complete its entire cycle before turning to another unit. Standby is not a necessary step and may be eliminated. During standby, depending on the process and the purpose of the treatment; can perform aeration, mixing and residual sludge removal. The length of the standby period is determined by the amount of treated water.

In a word, under the condition that the quality of inlet water and the size of the SBR reactor are fixed, the best method for increasing the treated water quantity is to reduce five-stage time of the SBR reactor, and under the condition that the quality of the inlet water and the treated water quantity are fixed, the volume of the SBR reactor can be reduced by reducing five-stage time of the SBR reactor, so that the investment is effectively reduced.

In the prior art, the SBR method is a key device of a decanter. The water level in the SBR reaction tank is changed, the water level is increased from the lowest level to the highest level when water is fed in, and the water level is decreased from the highest level to the lowest level when water is discharged out, so that the water outlet pipe of the SBR reaction tank is required to be arranged below the lowest water level. The intermittent water outlet requires centralized inflow discharge, can finish the water outlet task in a short time, and can take away a large amount of activated sludge when water is discharged if the shape and direction of the water outlet pipe are improper. Therefore, the decanter in the traditional SBR reactor is the best choice for the drainage of the SBR process, and only skims the supernatant liquid after the precipitation of the activated sludge, keeps the water surface stable in the process of water level reduction and does not disturb the sludge layer below. But the decanter has larger equipment, higher cost and inconvenient installation and maintenance.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, an object of the present invention is to provide a SBR reactor without a decanter, which realizes a drainage function without the need of decanting the water.

In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a need not SBR reactor of decanter, includes the retort body, the top of retort body is provided with the inlet tube, and its bottom is provided with aeration equipment, its characterized in that: at least two drain pipes are arranged on the side wall of the reaction tank body from top to bottom, wherein the lowest drain pipe is positioned at a position close to the lowest water level, a drain electric valve is arranged on each drain pipe, a slag discharge pipe is arranged on the drain pipe at the front side of a water inlet of each drain electric valve, and a slag discharge electromagnetic valve is arranged on each slag discharge pipe.

Waste water in the hydrolysis tank gets into the SBR reactor from the water inlet, and in the precipitation stage, activated sludge in the reactor sinks the reactor bottom in MLSS (mixed liquid suspended solid) in the waste water under the action of gravity, also has a small part MLSS to deposit the bottom of the pipeline of row's sediment pipe simultaneously, so the sediment that needs row sediment pipe bottom of the pipeline before this SBR reactor drainage is arranged the water and is arranged in advance.

When the SBR reactor is about to enter a drainage stage in the operation process, firstly, a deslagging electromagnetic valve (normally closed type) of an upper deslagging pipe is opened for 10 seconds to 60 seconds (the adjustment time is adjusted according to the actual operation condition), precipitated substances in the deslagging pipe are discharged, then, the deslagging electromagnetic valve is closed, a drainage electric valve of the drainage pipe and a deslagging electromagnetic valve of the deslagging pipe on the next drainage pipe are opened at the same time, at the moment, supernatant on the upper part of the SBR reactor is discharged to a next process reaction unit through the drainage pipe, the SBR reactor formally enters the drainage stage, the water level of the SBR reactor begins to gradually descend, when the drainage stage enters about 15 to 25 minutes (the adjustment is carried out according to the actual operation condition), the water level of the SBR reactor also descends to the vicinity of the next drainage pipe, at the moment, a drainage electric valve on the drainage pipe is opened to continuously drain water, after about 15-25min (adjusted according to actual operation conditions), the water level in the SBR reactor is lowered to the position near the next water discharge pipe, the water discharge stage is ended, all valves are in a closed state, and the SBR reactor also enters the next reaction stage. When the new SBR settling phase is finished, the next reaction phase is carried out, and when the new SBR settling phase is carried out, the process is repeated.

The utility model discloses set up a plurality of outlets, can realize like this that the last level drain pipe just begins the drainage when deposiing, saves operating duration. Meanwhile, after the supernatant fluid on the upper side is discharged, the water pressure is also reduced when the drain pipe on the lower side drains, so that the sludge on the bottom can be prevented from being sucked due to high pressure during drainage. Thereby realizing that no water decanter is required for drainage.

In the scheme, the method comprises the following steps: the lateral wall of retort body from the top down sets gradually two drain pipes, and one of them is located the position that leans on the minimum water level, and another is located its top.

In the scheme, the method comprises the following steps: the drain pipe positioned above is positioned 50-100cm below the highest water level.

In the scheme, the method comprises the following steps: the aeration device comprises an aeration pipe and aerators distributed on the aeration pipe.

Has the advantages that: the utility model discloses can realize the drainage function under the condition that need not strain the hydrophone, reduce reactor idle time, compare with traditional SBR reactor and have that the investment is economized, the working costs is low, simple installation, characteristics such as little good maintenance of equipment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be further described by way of examples with reference to the accompanying drawings:

example 1, as shown in fig. 1, the SBR reactor without decanter is composed of a reaction tank body 1, a water inlet pipe 2, an aeration pipe 3, an aerator 4, a drain pipe 5, a slag discharge pipe 6, a drain electric valve 7 and a slag discharge electromagnetic valve 8

The reaction tank body 1 is provided with a highest water level and a lowest water level, namely a lowest water level for water drainage and a highest water level for water filling. The top of the reaction tank body 1 is provided with a water inlet pipe 2, the bottom of the reaction tank body is provided with an aeration device, and the aeration device comprises an aeration pipe 3 and aerators 4 distributed on the aeration pipe 3. At least two drain pipes 5 are arranged on the side wall of the reaction tank body 1 from top to bottom, wherein the lowest drain pipe 5 is positioned close to the lowest water level, a drain electric valve 7 is arranged on each drain pipe 5, a slag discharge pipe 6 is arranged on the drain pipe 5 at the front side of a water inlet of the drain electric valve 7, and a slag discharge electromagnetic valve 8 is arranged on the slag discharge pipe 6. In the figure, two drain pipes 5 are arranged on the side wall of the reaction tank body 1 from top to bottom, wherein one drain pipe is positioned at the position close to the lowest water level, and the other drain pipe is positioned above the lowest water level. Preferably the upper located drain 5 is located 50-100cm below the highest water level.

The present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (4)

1. The utility model provides a need not SBR reactor of decanter, includes the retort body, the top of retort body is provided with the inlet tube, and its bottom is provided with aeration equipment, its characterized in that: at least two drain pipes are arranged on the side wall of the reaction tank body from top to bottom, wherein the lowest drain pipe is positioned at a position close to the lowest water level, a drain electric valve is arranged on each drain pipe, a slag discharge pipe is arranged on the drain pipe at the front side of a water inlet of each drain electric valve, and a slag discharge electromagnetic valve is arranged on each slag discharge pipe.

2. The SBR reactor without a decanter as claimed in claim 1, wherein: the lateral wall of retort body from the top down sets gradually two drain pipes, and one of them is located the position that leans on the minimum water level, and another is located its top.

3. The SBR reactor without a decanter as claimed in claim 2, wherein: the drain pipe positioned above is positioned 50-100cm below the highest water level.

4. The SBR reactor without decanter as claimed in any of claims 1-3, wherein: the aeration device comprises an aeration pipe and aerators distributed on the aeration pipe.

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