CN112321113B - Sludge treatment method and anaerobic digestion tank - Google Patents
Sludge treatment method and anaerobic digestion tank Download PDFInfo
- Publication number
- CN112321113B CN112321113B CN202011188797.4A CN202011188797A CN112321113B CN 112321113 B CN112321113 B CN 112321113B CN 202011188797 A CN202011188797 A CN 202011188797A CN 112321113 B CN112321113 B CN 112321113B
- Authority
- CN
- China
- Prior art keywords
- sludge
- anaerobic digestion
- digestion tank
- pipe
- anaerobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
Abstract
The invention discloses a sludge treatment method and an anaerobic digestion tank, wherein the treatment method comprises the following steps: step S100, feeding sludge to be treated into an anaerobic digestion tank; step S200, pumping out sludge at the bottom of the anaerobic digestion tank; step S300, inputting the extracted sludge to different layer heights of the anaerobic digestion tank, and inputting the sludge into the anaerobic digestion tank again by surrounding the inner wall of the anaerobic digestion tank; and step S400, returning to the step S200 until the sludge treatment is stopped. By adopting the invention, the sludge can uniformly return to the anaerobic digestion tank, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the biogas production rate, the biogas production rate and the biogas production quality of the anaerobic digestion tank are improved.
Description
Technical Field
The invention relates to a sludge treatment method and an anaerobic digestion tank.
Background
At present, in Europe, about 36000 anaerobic digestion reactors exist, and the sludge treatment capacity of the anaerobic digestion reactors accounts for about 40-50 percent; anaerobic digestion has a prevalence of about 60% in U.S. sewage plants in the united states; in japan, most sewage treatment plants also employ anaerobic digestion to treat sludge. Compared with the prior art, although the sludge anaerobic digestion technology starts earlier in China, the technology application development is slower, and only dozens of anaerobic digestion facilities are provided in thousands of sewage treatment plants in the country, which is still a great gap from the developed countries. Similar to the sludge incineration technology, the anaerobic digestion technology has four advantages of reduction, harmlessness, stabilization and recycling, particularly in the aspect of energy utilization, the anaerobic digestion technology releases sludge organic matter energy by natural biodegradation, realizes energy recycling, fully embodies the green and low-carbon treatment concept, and is one of the inevitable trends of future sludge treatment technology development.
The traditional sludge anaerobic digestion technology has the defects of long reaction period, low anaerobic rate and gas production efficiency, low methane yield, low methane content in the methane and the like. Especially when the digester is large in volume (>10000m3) And because of the limitation of the traditional stirring effect, the risk of short flow dead angles exists in the digestion tank.
Disclosure of Invention
The invention aims to overcome the defect of low anaerobic treatment efficiency in the prior art and provides a sludge treatment method and an anaerobic digestion tank.
The invention solves the technical problems through the following technical scheme:
the sludge treatment method is characterized by comprising the following steps:
step S100, feeding sludge to be treated into an anaerobic digestion tank;
step S200, pumping out sludge at the bottom of the anaerobic digestion tank;
step S300, inputting the extracted sludge to different layer heights of the anaerobic digestion tank, and inputting the sludge into the anaerobic digestion tank again by surrounding the inner wall of the anaerobic digestion tank;
and step S400, returning to the step S200 until the sludge treatment is stopped.
In the scheme, the sludge at the bottom of the anaerobic digestion tank is pumped out and input to different layer heights, and the sludge returns to the anaerobic digestion tank again around the inner wall of the anaerobic digestion tank, so that the sludge uniformly returns to the anaerobic digestion tank, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the biogas production rate, the biogas production rate and the biogas production quality of the anaerobic digestion tank are improved.
Preferably, the step S300 further includes: the sludge is circularly input into the anaerobic digestion tank from two sides at the input part.
In this scheme, on a certain height in the cell body, mud can advance mud round cell body inner wall on this high plane to promote the homogeneity that mud advances mud in the cell body space. And the mud can be inputed to both sides simultaneously at the junction, can promote the homogeneity of both sides side mud on the one hand, and on the other hand also can promote the efficiency of advancing mud. Thereby changing the defect of the traditional single-point sludge feeding and being capable of fully mixing the sludge in the anaerobic digestion tank.
Preferably, the step S300 further includes inputting the sludge into the anaerobic digester through a hydraulic diffusion pipe; the hydraulic diffusion pipes are arranged at the heights of different layers in the anaerobic digestion tank and surround the inner wall of the anaerobic digestion tank.
In the scheme, the hydraulic diffusion pipes are arranged at corresponding positions in the anaerobic digestion tank, so that sludge can enter the anaerobic digestion tank around the anaerobic digestion tank at different layer heights. In particular, the hydraulic diffusion pipe can be laid at a corresponding position. Other means may be used to allow the sludge at the bottom to be drawn out and into the anaerobic digester at different elevations, such as arranging corresponding pipes on the outer wall of the tank body.
Preferably, the hydraulic diffusion pipe is a reducing pipeline, and the diameter of the hydraulic diffusion pipe close to the mud inlet is larger than that of the hydraulic diffusion pipe far away from the mud inlet.
In the scheme, by adopting the structural form, on one hand, the actual flow rate of sludge diffused in the hydraulic diffusion pipe can be adapted, and pipes are saved; on the other hand, the mud inlet pipe at the far end is lighter, the gravity acting force on the mud inlet pipe can be reduced, the structural stability is improved, and the service life is prolonged; moreover, the flow velocity of the sludge is increased along with the reduction of the diameter of the pipeline, so that the sludge discharge quantity of the whole hydraulic diffusion pipe is uniform.
Preferably, the step S300 further includes: stirring the sludge in the anaerobic digestion tank while the sludge is input into the anaerobic digestion tank.
In this scheme, can carry out further stirring to the mud in the anaerobic digestion pond and mix to can further intensive mixing mud.
Preferably, the step S300 further includes: and conveying the pumped sludge to different layer heights of the anaerobic digestion tank from bottom to top along the longitudinal direction.
Preferably, the step S200 further includes: and pumping out the sludge at the bottom of the anaerobic digestion tank through a circulating pump arranged outside the anaerobic digestion tank.
Preferably, the step S200 further includes: and after sludge at the bottom of the anaerobic digestion tank is extracted, adding a treatment agent into the extracted sludge.
Preferably, the treatment formulation includes an anaerobic digestion functional material and a sulfur removal agent.
According to the scheme, the anaerobic digestion functional material and the sulfur removal agent are put in while the sludge is fed, so that the yield and the gas production efficiency of the anaerobic digestion biogas are improved, and the hydrogen sulfide content of the biogas is synchronously reduced. Thereby synchronously adopting physical stirring and chemical catalysis, and improving the biogas production rate, the biogas production rate and the biogas production quality of the anaerobic digester.
Preferably, the extraction flow rate and the input flow rate of the sludge are equal.
In this scheme, through making the speed of flow of taking out of mud equal with the input flow rate, can make the mud in the anaerobic digestion pond can flow in and flow out uniformly, carry out abundant stirring and mix.
An anaerobic digestion tank is characterized in that the anaerobic digestion tank is used for treating sludge by adopting the sludge treatment method.
In the scheme, the anaerobic digestion tank adopts the sludge treatment method, so that the sludge is uniformly returned to the anaerobic digestion tank, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the biogas production rate, the biogas production rate and the biogas production quality of the anaerobic digestion tank are improved.
The positive progress effects of the invention are as follows: the sludge at the bottom of the anaerobic digestion tank is pumped out and input to different layer heights, and the sludge returns to the anaerobic digestion tank again around the inner wall of the anaerobic digestion tank, so that the sludge uniformly returns to the anaerobic digestion tank, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the biogas production rate, the biogas production rate and the biogas production quality of the anaerobic digestion tank are improved.
Drawings
FIG. 1 is a schematic flow diagram of a sludge treatment method according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an anaerobic digester according to an embodiment of the present invention;
FIG. 3 is a schematic view of a connection at a variable diameter portion of a hydraulic diffuser according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a mud discharging pipe according to an embodiment of the present invention.
Description of the reference numerals
Anaerobic digester 1
Mud outlet pipe 200
Mud outlet main pipe 210
Mud outlet 220
Circulating pump 300
Mud inlet pipe 400
Mud inlet main pipe 410
Reducer connector 510
Mud inlet 550
Three-way pipe connector 600
Stirrer 700
Puddler 710
Stirring fan blade 720
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Embodiments of the present invention provide an anaerobic digestion tank 1 as shown in fig. 2 to 4, by which a sludge treatment method in embodiments of the present invention can be implemented. Specifically, the anaerobic digestion tank 1 comprises an anaerobic digestion tank 1 and a sludge discharge pipe 200, a circulating pump 300, a sludge inlet pipe 400 and a multilayer hydraulic diffusion pipe 500, wherein the tank body 100 is arranged in the anaerobic digestion tank 1; the hydraulic diffusion pipes 500 are distributed around the inner wall of the tank body 100; in the longitudinal direction, a plurality of layers of hydraulic diffusion pipes 500 are arranged in the tank body 100; the hydraulic diffusion pipe 500 is connected with the mud inlet pipe 400; the mud outlet pipe 200 is arranged at the bottom of the tank body 100; the circulating pump 300 is respectively connected with the sludge outlet pipe 200 and the sludge inlet pipe 400, and is used for pumping the sludge collected by the sludge outlet pipe 200 into the sludge inlet pipe 400 and entering the tank body 100 again through the hydraulic diffusion layer.
The embodiment of the invention provides a sludge treatment method, as shown in figure 1, the treatment method comprises the following steps:
step S100, feeding the sludge to be treated into the anaerobic digester 1.
In practice, the sludge to be treated may be fed to the anaerobic digester 1 through a separate feeding system.
And step S200, pumping out sludge at the bottom of the anaerobic digestion tank 1.
In a specific embodiment, as shown in fig. 2, the sludge in the bottom of the anaerobic digester 1 may be pumped out by a circulation pump 300 disposed outside the anaerobic digester 1. Among them, the circulation pump 300 may be a dry pump.
In specific implementation, as shown in fig. 2, the anaerobic digester 1 further includes a pipeline mixer 800, and the pipeline mixer 800 is disposed between the circulation pump 300 and the sludge inlet pipe 400 and located outside the tank body 100.
As a preferred implementation, step S200 further includes: after the sludge at the bottom of the anaerobic digestion tank 1 is extracted, a treatment agent is added to the extracted sludge through a line mixer 800.
Specifically, as shown in fig. 2, the line mixer 800 is provided with a first input port 810 and a second input port 820.
Specifically, the treatment agent includes anaerobic digestion functional materials and a sulfur removal agent, and the anaerobic digestion functional materials can be administered through the first administration port 810, and the sulfur removal agent can be administered through the second administration port 820.
Wherein, the anaerobic digestion functional material is a material with conductivity and no biotoxicity; provides a conductive medium for electron transfer among microorganisms, so that direct electron transfer can be carried out among the microorganisms, and H dependence is eliminated2The electron transfer as the electron carrier greatly improves the speed and efficiency of transferring electrons to methanogenic bacteria by other strains in the metabolic process, thereby accelerating the speed of producing methaneAnd the efficiency is improved, and the methane yield is improved. Specifically, it may be a carbon-based material or an iron-based material, such as powdered activated carbon, zero-valent iron, or the like. When powdered activated carbon or magnetic powder media are added at the sewage advanced treatment end, the advanced treatment chemical sludge can be introduced into a sludge digestion system to strengthen the anaerobic digestion process; thereby saving resources and reducing cost. The sulfur removing agent can be bivalent or trivalent iron salt, so as to reduce the content of hydrogen sulfide in the methane.
By synchronously adopting the physical circulating stirring and the chemical catalysis, the methane production rate and the methane production quality of the anaerobic digestion tank 1 can be improved.
And step S300, inputting the extracted sludge to different layer heights of the anaerobic digestion tank 1, and inputting the sludge into the anaerobic digestion tank 1 again by surrounding the inner wall of the tank body 100 of the anaerobic digestion tank 1.
As a preferred embodiment, as shown in fig. 2, step S300 further includes inputting the sludge into the anaerobic digester 1 through a hydraulic diffusion pipe 500; the hydraulic diffusion pipes 500 are arranged at different heights in the anaerobic digestion tank 1 and are arranged around the inner wall of the tank body 100 of the anaerobic digestion tank 1.
In particular implementations, the hydraulic diffuser pipes 500 may be laid at corresponding locations. Other means may be used to allow the sludge at the bottom to be drawn out and enter the anaerobic digester 1 at different heights, such as corresponding pipes arranged on the outer wall of the tank body 100.
As a preferred implementation, step S300 further includes: the sludge is circularly input into the anaerobic digestion tank 1 from two sides at the input part. At a certain height in the tank body 100, the sludge can enter around the inner wall of the tank body 100 on the height plane, thereby improving the uniformity of sludge entering in the space of the tank body 100. And the mud can be inputed to both sides simultaneously at the junction, can promote the homogeneity of both sides side mud on the one hand, and on the other hand also can promote the efficiency of advancing mud. Thereby changing the defect of the traditional single-point sludge feeding and being capable of fully mixing the sludge in the anaerobic digestion tank 1.
In specific implementation, as shown in fig. 2, the sludge inlet pipe 400 may be connected to the hydraulic diffuser pipe 500 through a three-way pipe connector 600, one channel of the three-way pipe connector 600 is connected to the sludge inlet pipe 400, and the other two channels are respectively connected to two ends of the hydraulic diffuser pipe 500, so that when sludge in the sludge inlet pipe 400 enters the hydraulic diffuser pipe 500, the sludge can enter from two ends of the hydraulic diffuser pipe 500 at the same time.
In specific implementation, as shown in fig. 2 and 3, the hydraulic diffuser 500 is a reducing pipe, and the diameter of the hydraulic diffuser 500 close to the mud inlet pipe 400 is larger than the diameter far from the mud inlet pipe 400. That is, the pipe diameter close to the mud inlet pipe 400 is large, and the pipe diameter far from the mud inlet pipe 400 is small; the diffusion pipes with different pipe diameters are arranged according to the pipe diameters, and the adjacent diffusion pipes are connected through a reducing pipe connecting piece 510 to form a continuous reducing annular structure. By adopting the structure form, on one hand, the actual flow of the sludge diffused in the hydraulic diffusion pipe 500 can be adapted, and pipes are saved; on the other hand, the mud inlet pipe at the far end is lighter, the gravity acting force on the mud inlet pipe can be reduced, the structural stability is improved, and the service life is prolonged; moreover, the flow velocity of the sludge is increased along with the reduction of the diameter of the pipeline, so that the sludge discharge quantity of the whole hydraulic diffusion pipe is uniform.
In particular implementations, the diameter of the hydraulic diffuser 500 near the mud intake pipe 400 can be made larger than that far away in a variety of ways.
In one specific embodiment, the hydraulic diffuser 500 includes a plurality of diffuser legs that are connected in series by a reducer connector 510. As shown in fig. 2 and 3, the hydraulic diffuser 500 includes a first diffuser manifold 520, a second diffuser manifold 530, and a third diffuser manifold 540, one end of the first diffuser manifold 520 and one end of the second diffuser manifold 530 are respectively connected to the sludge inlet pipe 400, the third diffuser is in a half-ring structure, and the other end of the first diffuser manifold 520 and the other end of the second diffuser manifold 530 are respectively connected to both ends of the third diffuser manifold 540 through reducer connectors 510. Therefore, the reducing pipeline can be formed, and in addition, the assembly is convenient and the manufacturing cost is reduced.
In another specific embodiment, the diameter of the hydraulic diffusion pipe 500 may be gradually reduced along the flowing direction of the sludge, so as to form a structure with a continuously variable diameter.
In a preferred embodiment, as shown in fig. 3, the lower surface of the hydraulic diffuser 500 is provided with a plurality of mud inlet holes 550.
As a preferred embodiment, the distance between the mud inlet holes 550 on the hydraulic diffuser 500 can be calculated according to the mud inlet flow rate and the flow distribution, and the distance between the mud inlet holes 550 satisfies the following formula:
wherein d is the orifice spacing in m; d is the diameter of the diffusion tube and the unit m; v is the flow speed of the mud discharged from the hole opening, and the unit is m/s;
is the orifice diameter, in m; q is the flow rate of the circulating sludge in m3And s. Thereby making the mud discharge of the hydraulic diffusion pipe 500 smoother and more uniform. In specific implementation, the mud inlet flow rate is considered to be 2 m/s-3 m/s, and the size of the mud inlet holes 550 and the arrangement distance of the mud inlet holes 550 can be correspondingly set according to the flow rate.
As a preferred embodiment, as shown in FIG. 2, the mud outlet pipe 200 is transversely disposed around the inner wall of the tank body 100, and a plurality of mud outlets 220 are uniformly formed on the upper surface of the mud outlet pipe 200. Thereby evenly pumping out the sludge at the bottom of the anaerobic digestion tank 1 and fully mixing the sludge in the anaerobic digestion tank 1.
As a preferred embodiment, as shown in fig. 4, the mud outlet pipe 200 is a constant diameter pipe.
In specific implementation, the sludge outlet pipe 200 is connected to the circulation pump 300 through a sludge outlet main pipe 210, and the sludge outlet main pipe 210 serves as a sludge outlet pipe 200 of the anaerobic digester 1 and correspondingly serves as a sludge inlet pipe 400 of the circulation pump 300. The mud discharging pipe 200 and the mud discharging main pipe 210 can also be connected through a three-way pipe connector 600, the mud discharging pipe 200 is an annular pipeline, and two ends of the joint of the mud discharging pipe 200 and the mud discharging main pipe 210 are both communicated with the mud discharging main pipe 210 through the three-way pipe connector 600. Further, the distance between the mud outlets 220 can also satisfy the above formula regarding the distance between the mud inlet holes 550. The mud discharging flow rate is considered to be 2 m/s-3 m/s, and the size of the mud discharging holes and the arrangement distance of the mud discharging holes can be correspondingly set according to the flow rate.
As a preferred implementation, step S300 further includes: the sludge in the anaerobic digester 1 is stirred while the sludge is fed into the anaerobic digester 1. Thereby further stirring and mixing the sludge in the anaerobic digestion tank 1, and further sufficiently mixing the sludge.
In specific implementation, as shown in fig. 2, the anaerobic digester 1 further comprises a stirrer 700, and the stirrer 700 penetrates through the top wall of the anaerobic digester 1 and is longitudinally arranged in the tank body 100; the hydraulic diffuser 500 is disposed around the agitator 700. Thus, the sludge in the anaerobic digester 1 can be further stirred and mixed by the stirrer 700, and the sludge can be further and sufficiently mixed. Further, the agitator 700 includes an agitator shaft 710 and agitator blades 720, and one end of the agitator blades 720 is connected to the agitator shaft 710 and rotates as the agitator shaft 710 rotates.
As a preferred implementation, step S300 further includes: the extracted sludge is conveyed to different heights of the anaerobic digestion tank 1 along the longitudinal direction from bottom to top.
In specific implementation, the sludge inlet pipe 400 may be laid on the inner wall of the tank body 100 from bottom to top, the hydraulic diffusion pipe 500 is laid around the inner wall of the tank body 100 at a corresponding height, and both ends of the joint of the annular hydraulic diffusion pipe 500 and the sludge inlet pipe 400 are communicated with the sludge inlet pipe 400. Thereby on cell body 100 inner wall, can form and be equipped with a plurality of mud departments of advancing on longitudinal space, can have the structural style of a plurality of mud points of play in horizontal space to combine agitator 700 to mix the stirring in the centre, make cell body 100's mud can the intensive mixing through the physical stirring effect, promote the anaerobic digestion efficiency of mud.
In a preferred embodiment, the sludge withdrawal flow rate and the sludge inlet flow rate are equal. Thereby enabling the sludge in the anaerobic digestion tank 1 to uniformly flow in and out, and performing sufficient stirring and mixing.
And step S400, returning to step S200 until the sludge treatment is stopped.
The sludge at the bottom of the anaerobic digestion tank 1 is pumped out and input to different layer heights, and returns to the anaerobic digestion tank 1 again around the inner wall of the tank body 100 of the anaerobic digestion tank 1, so that the sludge uniformly returns to the anaerobic digestion tank 1, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the methane production rate, the methane production rate and the methane production quality of the anaerobic digestion tank 1 are improved.
The embodiment of the invention also provides an anaerobic digestion tank 1, and the anaerobic digestion tank 1 adopts the sludge treatment method to treat the sludge. By adopting the sludge treatment method, the sludge can uniformly return to the anaerobic digestion tank 1, the sludge in the digestion tank can be fully mixed and stirred, the efficiency of the anaerobic digestion process is improved, and the methane production rate, the methane production rate and the methane production quality of the anaerobic digestion tank 1 are improved.
In combination with specific implementation scenarios, the following provides an installation method of the anaerobic digester 1, wherein the diameter of the anaerobic digester 1 is 28m, the height of the anaerobic digester is 27m, and the effective volume of the anaerobic digester 1 is 14000m3The medium-temperature primary anaerobic digestion process is adopted, and the stirring form is mechanical stirring, namely, mechanical vertical shaft stirrer 700 is adopted for mechanical stirring. The circulating pump 300 is a variable frequency dry pump with a flow rate of 100m3H is used as the reference value. The hydraulic diffuser 500 may be made of 316L stainless steel; the mud outlet pipe 200300 can also be made of 316L stainless steel; the pipe mixer 800 is installed on the sludge discharge main pipe 210 of the circulation pump 300 (i.e., the sludge inlet main pipe 410 of the anaerobic digester 1).
Specifically, the mounting method comprises the following steps:
A. a dry sludge circulating pump 300 is arranged outside the anaerobic digestion tank 1 and used for circulating the sludge in the digestion tank;
B. an annular sludge pump sludge inlet pipe 400 is arranged at the bottom of the digestion tank and is laid along the inner wall of the digestion tank, a vertically upward sludge outlet hole is formed in the annular sludge inlet pipe 400 to achieve the purpose of uniformly discharging sludge, and the sludge enters the circulating pump 300 through the annular sludge outlet pipe 200;
C. the mud inlet pipe 400 is vertically arranged along the inner wall of the digestion tank, and is connected with the annular hydraulic diffusion pipes 500 in a dispersing way along two sides after passing through the three-way pipe connecting piece 600, and the annular hydraulic diffusion pipes are laid along the inner wall of the digestion tank and are vertically arranged in a layered way in the digestion tank so as to achieve the purpose of uniformly discharging mud. The hydraulic diffusion pipes 500 are arranged in a vertical layered mode, and the vertical distance is controlled to be 5-10 m, preferably 7 m.
D. The sludge outlet pipe 200 of the circulating sludge pump is provided with a pipeline mixer 800, anaerobic digestion functional materials and a sulfur removal medicament are added while sludge is discharged, the efficiency of the anaerobic digestion process is improved through chemical catalysis, and the content of hydrogen sulfide in the methane is synchronously reduced.
The hydraulic diffusion pipes 500 are annularly arranged along the inner wall of the digestion tank in the horizontal direction and are arranged in a layered mode in the vertical direction along the barrel of the digestion tank, so that mud can be uniformly discharged in the radial direction of the digestion tank, the mud feeding mode overcomes the defect of the traditional single-point mud feeding mode, and the mud in the digestion tank can be sufficiently mixed and stirred.
In the specific arrangement, the hydraulic diffusion pipes 500 are annularly arranged along the wall of the digestion tank 1, and the central diameter of each annular pipe diffusion pipe is 26 m; the hydraulic diffusion pipes 500 are vertically arranged in three layers along the digestion tank 1, and the vertical distance is 5-10 m, preferably 7 m. The hydraulic diffusion pipe 500 adopts a reducing structure, the pipe diameter of the end close to the mud inlet pipe 400 is large, and the pipe diameter of the end far away from the mud inlet pipe 400 is small. The pipe diameters of the main mud inlet pipe 410 and the mud inlet pipe 400 are DN150, the axis of the digestion tank 1 is taken as a reducing point, the pipe diameter of the hydraulic diffusion pipe 500 close to the end of the mud inlet pipe 400 is DN100, and the pipe diameter of the hydraulic diffusion pipe 500 far away from the end of the mud inlet pipe 400 is DN 80. That is, in fig. 3, the pipe diameter of the left end hydraulic diffusion pipe 500 is DN100, and the pipe diameter of the right end hydraulic diffusion pipe 500 is DN 80.
And the mud inlet holes 550 are arranged below the hydraulic diffusion pipe 500, the mud outlet flow rate is 2 m/s-3 m/s, specifically 2m/s, the opening size of the mud inlet holes 550 is 20mm, 15 mud inlet holes 550 are arranged in each horizontal annular hydraulic diffusion pipe 500 according to the mud inlet amount of circulating mud, and the arrangement distance of the mud inlet holes 550 is 35 m.
The sludge outlet pipe 200 is arranged at the bottom of the digestion tank 1 and can be 2m away from the bottom of the digestion tank, and the diameter of the sludge outlet pipe 200 is DN 150; the mud outlet 220 is arranged above the mud outlet pipe 200, and the mud outlet flow speed can be 2 m/s-3 m/s, in particular 2 m/s. The opening size of the sludge outlet 220 is 30mm, and the arrangement interval of the sludge outlet 220 is 26 m.
The sludge inlet main pipe 410 is provided with a pipeline mixer 800, powdered activated carbon is added at the anaerobic digestion functional material adding point of the pipeline mixer 800, and a ferric trichloride agent is added at the sulfur removal agent adding point. The dosage of the neutral carbon can be 100mg/L, and the dosage of the three-filter ferric oxide medicament can be 100 mg/L.
By adopting the device and the equipment, the anaerobic digestion tank 1 can synchronously realize physical circulation stirring and chemical catalysis, and the methane production rate, the methane production rate and the methane production quality of the anaerobic digestion tank 1 are improved. Wherein the physical stirring effect is mainly realized by a circulating pump 300, a horizontal annular hydraulic diffusion pipe 500 and a sludge outlet pipe 200 at the bottom of the digestion tank 1; the chemical catalysis effect is realized by adding corresponding materials through a pipeline mixer 800, an anaerobic digestion functional material adding point and a sulfur removal agent adding point.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (7)
1. A method for treating sludge, characterized in that the method comprises the following steps:
step S100, feeding sludge to be treated into an anaerobic digestion tank;
step S200, pumping out sludge at the bottom of the anaerobic digestion tank;
step S300, inputting the extracted sludge to different layer heights of the anaerobic digestion tank, and inputting the sludge into the anaerobic digestion tank again by surrounding the inner wall of the anaerobic digestion tank; wherein the sludge is input into the anaerobic digestion tank through a hydraulic diffusion pipe; the hydraulic diffusion pipes are arranged at the heights of different layers in the anaerobic digestion tank and arranged around the inner wall of the anaerobic digestion tank; a sludge inlet hole is formed below the hydraulic diffusion pipe, and sludge can enter from two ends of the hydraulic diffusion pipe simultaneously when entering the hydraulic diffusion pipe, so that the sludge is circularly input into the anaerobic digestion tank from two sides at an input position; stirring the sludge in the anaerobic digester while the sludge is input into the anaerobic digester;
and step S400, returning to the step S200 until the sludge treatment is stopped.
2. The method for treating sludge according to claim 1, wherein the hydraulic diffusion pipe is a reducing pipe, and the diameter of the hydraulic diffusion pipe close to the sludge inlet is larger than that of the hydraulic diffusion pipe far from the sludge inlet.
3. The method for treating sludge according to claim 1, wherein the step S300 further comprises: and conveying the pumped sludge to different layer heights of the anaerobic digestion tank from bottom to top along the longitudinal direction.
4. The method for treating sludge according to claim 1, wherein the step S200 further comprises: and pumping out the sludge at the bottom of the anaerobic digestion tank through a circulating pump arranged outside the anaerobic digestion tank.
5. The method for treating sludge according to claim 1, wherein the step S200 further comprises: and after the sludge at the bottom of the anaerobic digestion tank is extracted, adding a treatment preparation into the extracted sludge, wherein the treatment preparation comprises anaerobic digestion functional materials and a sulfur removal agent.
6. The method of sludge treatment according to claim 1, wherein the sludge withdrawal flow rate and the sludge inlet flow rate are equal.
7. An anaerobic digester, characterized in that the anaerobic digester treats sludge by the method for treating sludge according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188797.4A CN112321113B (en) | 2020-10-30 | 2020-10-30 | Sludge treatment method and anaerobic digestion tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188797.4A CN112321113B (en) | 2020-10-30 | 2020-10-30 | Sludge treatment method and anaerobic digestion tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112321113A CN112321113A (en) | 2021-02-05 |
| CN112321113B true CN112321113B (en) | 2021-12-31 |
Family
ID=74297346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011188797.4A Active CN112321113B (en) | 2020-10-30 | 2020-10-30 | Sludge treatment method and anaerobic digestion tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112321113B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603142A (en) * | 2012-03-19 | 2012-07-25 | 同济大学 | Method for producing biogas by aid of intensified anaerobic fermentation of pretreated circular backflow sludge |
| CN107522375A (en) * | 2017-08-22 | 2017-12-29 | 华南理工大学 | A kind of method that Zero-valent Iron and activated carbon strengthen excess sludge anaerobic digestion methane phase |
| CN110342767A (en) * | 2019-07-23 | 2019-10-18 | 天津大学 | A kind of high solid anaerobic sludge digestion stirring system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002001398A (en) * | 2000-06-28 | 2002-01-08 | Tsukishima Kikai Co Ltd | Process and equipment for treating sludge |
| CN102079575A (en) * | 2011-03-09 | 2011-06-01 | 上海百峰环保工程有限公司 | Anaerobic reaction device |
| CN104261644B (en) * | 2014-10-27 | 2016-03-30 | 天津乾闰环境工程咨询有限公司 | A kind of method improving wastewater sludge anaerobic digestion efficiency |
| CN104560686B (en) * | 2015-02-09 | 2017-02-22 | 潍坊金丝达新能源科技有限公司 | Hydraulic stirring anaerobic jar |
| CN204874527U (en) * | 2015-06-26 | 2015-12-16 | 北京中持绿色能源环境技术有限公司 | High efflux agitating unit and anaerobic fermentation tank for anaerobic fermentation tank admittedly of containing |
-
2020
- 2020-10-30 CN CN202011188797.4A patent/CN112321113B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603142A (en) * | 2012-03-19 | 2012-07-25 | 同济大学 | Method for producing biogas by aid of intensified anaerobic fermentation of pretreated circular backflow sludge |
| CN107522375A (en) * | 2017-08-22 | 2017-12-29 | 华南理工大学 | A kind of method that Zero-valent Iron and activated carbon strengthen excess sludge anaerobic digestion methane phase |
| CN110342767A (en) * | 2019-07-23 | 2019-10-18 | 天津大学 | A kind of high solid anaerobic sludge digestion stirring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112321113A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112321114B (en) | Anaerobic digestion tank and sewage treatment plant | |
| CN113511788B (en) | Organic solid waste wet oxidation treatment system and treatment process thereof | |
| CN204714580U (en) | Upflowing Fenton fluidized-bed | |
| CN101462028A (en) | Large-sized agitated tank | |
| CN101343108A (en) | Method for coupling treatment of sewage water of waterpower cavitation and ozone | |
| CN103539293A (en) | High-efficiency iron carbon-Fenton combined reactor for high-concentration organic wastewater pretreatment | |
| CN105565489A (en) | Sludge circulation efficient hydrolytic reactor | |
| CN112321113B (en) | Sludge treatment method and anaerobic digestion tank | |
| CN104759228A (en) | Gas push type self-mixing combined purifying tank | |
| CN203794682U (en) | Internal circulation fenton fluidized bed reactor | |
| CN114560608B (en) | Sludge treatment method and anaerobic digestion tank | |
| CN201182924Y (en) | Return sludge flow clarifying basin | |
| CN209890349U (en) | Low carbon nitrogen ratio domestic sewage integrated treatment device | |
| CN114906998B (en) | Sludge anaerobic digestion tank | |
| CN207659165U (en) | A kind of Fenton oxidation reaction tower apparatus | |
| CN114409069B (en) | Annular spiral-flow type anaerobic reactor for pretreatment of high-concentration chemical fiber wastewater | |
| CN102408154A (en) | Biological wastewater treatment device implementing stirring operation by using anaerobic gas | |
| CN202265458U (en) | Anaerobic biological filter | |
| CN201439501U (en) | Upflow anaerobic sludge bed reactor of overhead aeration tank | |
| CN210559995U (en) | High solid sludge anaerobic digestion mixing system | |
| CN202465363U (en) | Low pressure oxygenation jet apparatus | |
| CN203382562U (en) | Combined oxidation ditch | |
| CN206580623U (en) | A kind of anerobic sowage biological treatment tank provided with jet-loop structure | |
| CN1821102A (en) | Low pressure chemical adding blender | |
| CN219194759U (en) | Membrane oxygen integrated wastewater advanced treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |