CN215799095U - Sludge treatment system applied to sewage treatment plant - Google Patents

Abstract

The utility model provides a sludge treatment system applied to a sewage treatment plant, which comprises a contact tank, a dehydration treatment system, a dosing system and a transfer bin, wherein the contact tank, the dehydration treatment system and the transfer bin are sequentially connected, the contact tank is communicated with a gas pipeline for conveying ozone to the contact tank, the dehydration treatment system comprises a sedimentation tank and a dehydrator which are sequentially connected, the dosing system is connected with the dehydrator, the dehydrator is used for carrying out centrifugal treatment on the sludge after sedimentation treatment so as to separate water from the sludge, and the dosing system is used for adding a flocculating agent into the dehydrator.

Description

Sludge treatment system applied to sewage treatment plant

Technical Field

The utility model relates to the field of sewage treatment, in particular to a sludge treatment system applied to a sewage treatment plant.

Background

With the continuous improvement of the urbanization rate in China, the sewage yield generated in cities is increased in successive years, and the sewage in the cities contains a large amount of sludge. The sludge treatment in sewage plants is a processing process of carrying out reduction and harmlessness such as concentration and dehydration, impurity removal and the like on the sludge, and the treated sludge is usually discarded in natural environment for landfill, so that a final digestion mode which is stable for a long time and has no adverse effect on ecological environment can be achieved. It is estimated that about 5-8 tons of sludge can be treated per ten thousand tons of sewage in the municipal sewage treatment plant, and the water content of the treated sludge is more than 80%.

The existing sludge treatment mode is gravity concentration and further dehydration, finally treated sludge is transported out for landfill, the landfill area is large and the investment is high due to the fact that the sludge moisture content is high and the volume of the landfill sludge is large, and moreover, the sludge moisture content obtained by the existing sludge treatment system is high, and serious problems are caused to the abandonment or reutilization of subsequent sludge. With the increasing of the sludge amount year by year, how to reduce the water content in the sludge without greatly increasing the cost of sludge treatment becomes the most core problem at present.

Disclosure of Invention

Based on this, there is a need for a sludge treatment system for use in a sewage treatment plant.

In order to solve the technical problems, the utility model provides a sludge treatment system applied to a sewage treatment plant, which comprises a contact tank, a dehydration treatment system, a dosing system and a transfer bin, wherein the contact tank, the dehydration treatment system and the transfer bin are sequentially connected, the contact tank is communicated with a gas pipeline for conveying ozone to the contact tank, the dehydration treatment system comprises a sedimentation tank and a dehydrator which are sequentially connected, the dosing system is connected with the dehydrator, the dehydrator is used for performing centrifugal treatment on the sludge subjected to sedimentation treatment so as to separate water from the sludge, and the dosing system is used for adding a flocculating agent into the dehydrator.

Preferably, the connecting port of the gas transmission pipeline is positioned at the top of the contact tank, a stirring device for auxiliary stirring is arranged in the contact tank, and the stirring device is positioned at the bottom of the contact tank, so that the contact area of sludge and ozone in the contact tank is increased.

Preferably, the medicine system includes medicament storehouse and charging conduit, charging conduit with the hydroextractor is connected, the medicament storehouse is used for storing the flocculating agent.

Preferably, the dehydrator is connected with a flushing system, the flushing system comprises a water storage tank, a flushing pump and a water pipeline, the water storage tank is connected with the dehydrator through the water pipeline, and the water pipeline is connected with the flushing pump.

Preferably, the sedimentation tank with be provided with first delivery pump between the hydroextractor, the hydroextractor with be provided with the second delivery pump between the transfer feed bin, mud in the sedimentation tank lets in through first delivery pump in the hydroextractor, mud in the hydroextractor lets in through the second delivery pump in the transfer feed bin.

Preferably, the first conveying pump and the second conveying pump are screw pumps, and the dehydrator is a centrifugal dehydrator.

Preferably, the sludge treatment system further comprises an electric control device, electric valves are arranged between the flushing pump and the dewatering machine and between the second conveying pump and the transfer bin, and the dewatering machine, the flushing pump and the electric valves are electrically connected with the electric control device.

Preferably, the dehydrator is connected with a water draining pipeline, and the water receiving end of the water draining pipeline is positioned at the bottom of the dehydrator.

The utility model has the beneficial effects that: the system adds ozone into the contact tank to break the wall of the sludge, utilizes the dosing system to assist in adding the flocculating agent during dehydration, and utilizes the dehydrator to further dehydrate and reduce the water content, the combination of the three greatly improves the sewage treatment efficiency, the water content of the sludge obtained by final treatment is reduced, and the system has important significance for urban sewage plants with increasingly enlarged scale.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the utility model.

FIG. 1 is a block diagram of a sludge treatment system according to a preferred embodiment of the present invention;

FIG. 2 is a block diagram showing the construction of a sludge treatment system according to a preferred embodiment of the present invention;

in the figure: a contact tank 1; a sedimentation tank 2; a dehydrator 3; a dosing system 4; a medicament cartridge 40; a feed line 41; a transfer bin 5; a gas transmission pipeline 6; a water storage tank 71; a flush pump 72; a water delivery pipe 73; a first delivery pump 8; a second delivery pump 9; an electrically operated valve 10; a water discharge pipeline 11; a cutter 12.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, the present invention provides a sludge treatment system applied to a sewage treatment plant, including a contact tank 1, a dehydration treatment system, a dosing system 4 and a transit bunker 5, where the contact tank 1, the dehydration treatment system and the transit bunker 5 are sequentially connected, the contact tank 1 is communicated with a gas transmission pipeline 6 for transmitting ozone to the contact tank 1, the dehydration treatment system includes a sedimentation tank 2 and a dehydrator 3, which are sequentially connected, the dosing system 4 is connected with the dehydrator 3, the dehydrator 3 is configured to perform centrifugal treatment on sludge after sedimentation treatment, so as to separate water in the sludge from the sludge, and the dosing system 4 is configured to add a chemical agent into the dehydrator 3. The sewage is fully contacted with the ozone in the contact tank 1, the ozone breaks the wall of the sludge in the sewage, the water storage capacity of the sludge is damaged, and the subsequent dehydration efficiency is conveniently improved; the wall-broken mud-water mixture is primarily dehydrated in the sedimentation tank 2 after sedimentation for 8-12 hours, so that the energy consumption and the treatment efficiency of a subsequent dehydrator are saved, the sludge is concentrated at the bottom of the sedimentation tank 2, and after the water on the upper layer flows out, the large sludge at the bottom of the sedimentation tank 2 is crushed by a cutting machine 12; the sludge obtained after the primary concentration in the sedimentation tank 2 is further dehydrated by a dehydrator 3 to obtain sludge with lower water content.

Referring to fig. 1, in a preferred embodiment, the inlet of the gas transmission pipeline 6 is located at the top of the contact tank 1, and a stirring device for auxiliary stirring is arranged in the contact tank 1 and is located at the bottom of the contact tank 1, so as to increase the contact area between the sludge in the contact tank 1 and the ozone.

Referring to fig. 1, in a preferred embodiment, the dosing system 4 comprises a chemical tank 40 and a feeding pipe 41, the feeding pipe 41 is connected to the dewatering machine 3, the chemical tank 40 is used for storing a flocculant, and the flocculant is a mixture of PAC and PAM.

Referring to fig. 1, in a preferred embodiment, the dewatering machine 3 is connected with a flushing system, which comprises a water storage tank 71, a flushing pump 72 and a water pipe 73, wherein the water storage tank 71 is connected with the dewatering machine 3 through the water pipe 73, and the water pipe 73 is connected with the flushing pump 72.

Referring to fig. 1, in a preferred embodiment, a first delivery pump 8 is disposed between the sedimentation tank 2 and the dewatering machine 3, a second delivery pump 9 is disposed between the dewatering machine 3 and the transfer bin 5, sludge in the sedimentation tank 2 is introduced into the dewatering machine 3 through the first delivery pump 8, and sludge in the dewatering machine 3 is introduced into the transfer bin 5 through the second delivery pump 9.

Referring to fig. 1, in a preferred embodiment, the first transfer pump 8 and the second transfer pump 9 are each a progressive cavity pump. The screw pump moves the sludge.

In a preferred embodiment, the sludge treatment system further includes a host and an electrical control device, electric valves 10 are respectively disposed between the flushing pump 72 and the dewatering machine 3, and between the second delivery pump 9 and the transfer bin 5, and the dewatering machine 3, the flushing pump 72 and the electric valves 10 are electrically connected to the host through the electrical control device.

Referring to fig. 1, in a preferred embodiment, a drain pipe 11 is connected to the dehydration engine 3, and a water receiving end of the drain pipe 11 is located at the bottom of the dehydration engine 3. The sewage after mud-water separation is discharged through a water discharge pipeline 11.

The system work flow is as follows: store sewage treatment plant's mud to contact tank 1, through throwing ozone and supplementary stirring in to contact tank 1, degradation broken wall after making the filth in the mud fully contact with ozone, and then get into sedimentation tank 2, mud passes through 8-12 hours's settlement concentration in sedimentation tank 2, treat the rivers back of upper strata, the bold mud of sedimentation tank 2 bottom of the pool is stirred up via cutting machine 12, and then carry to hydroextractor 3 by the screw pump, mud is after the further dehydration of hydroextractor 3, carry to transfer feed bin 5 by the screw pump and store, treat that the mud car is ready to carry outward transportation through the screw pump. The method comprises the following steps of (1) carrying out sludge dewatering by a centrifugal dewatering machine, and simultaneously carrying out sludge flocculation by adding flocculating agents PAC and PAM in an auxiliary manner by a dosing system, wherein the sludge can be agglomerated by the step, so that the water content of the dewatered sludge can be reduced; after the centrifugal dehydrator is stopped, the centrifugal machine is cooled and washed by the washing system, and residual sludge in the equipment is washed clean.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "preferred embodiment," "yet another embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (8)

1. The utility model provides a be applied to sewage treatment plant's sludge treatment system, its characterized in that, includes contact tank, dehydration processing system, charge system and transfer feed bin, the contact tank the dehydration processing system with the transfer feed bin connects gradually, contact tank intercommunication has the gas transmission pipeline who is used for carrying ozone for the contact tank, the dehydration processing system is including the sedimentation tank and the hydroextractor that connect gradually, charge system with the hydroextractor is connected, the hydroextractor is used for carrying out centrifugal treatment with the mud after the sedimentation treatment to separate water and mud in the mud, charge system is used for add the flocculating agent in the hydroextractor.

2. The sludge treatment system of claim 1 wherein the inlet of the gas transmission pipeline is located at the top of the contact tank, and wherein an agitation device for auxiliary agitation is arranged in the contact tank, and wherein the agitation device is located at the bottom of the contact tank, so as to increase the contact area of the sludge in the contact tank and the ozone.

3. The sludge treatment system of claim 2, wherein the dosing system comprises a chemical bin and a feed pipe, the feed pipe is connected with the dewatering machine, and the chemical bin is used for storing a flocculant.

4. The sludge treatment system of claim 3, wherein the dewatering machine is connected with a flushing system, the flushing system comprises a water storage tank, a flushing pump and a water conveying pipeline, the water storage tank is connected with the dewatering machine through the water conveying pipeline, and the water conveying pipeline is connected with the flushing pump.

5. The sludge treatment system of claim 4, wherein a first transfer pump is disposed between the sedimentation tank and the dewatering machine, a second transfer pump is disposed between the dewatering machine and the transfer bin, the sludge in the sedimentation tank is introduced into the dewatering machine through the first transfer pump, and the sludge in the dewatering machine is introduced into the transfer bin through the second transfer pump.

6. The sludge treatment system of claim 5, wherein the first transfer pump and the second transfer pump are screw pumps and the dewaterer is a centrifugal dewaterer.

7. The sludge treatment system of claim 5, further comprising a host and an electrical control device, wherein electric valves are disposed between the flushing pump and the dewatering machine and between the second delivery pump and the transfer bin, and the dewatering machine, the flushing pump and the electric valves are electrically connected to the host through the electrical control device.

8. The sludge treatment system of claim 4 wherein a drain pipe is connected to the dewatering machine, a water receiving end of the drain pipe being located at a bottom of the dewatering machine.

Images