Device for reducing moisture content of sludge

Abstract

The utility model discloses a device for reducing the water content of sludge, which belongs to the field of sewage treatment and comprises a buoy water decanter, an ultrasonic sludge level meter, a drain pipe and an electric butterfly valve. Wherein the buoy water decanter is arranged on the sewage surface of the sludge storage tank in a floating mode, a water drainage opening in the bottom of the buoy water decanter is connected with the water drainage pipe, the electric butterfly valve is arranged on the water drainage pipe, and the water outlet end of the water drainage pipe extends out of the sludge storage tank; the ultrasonic sludge level meter is inserted into the sludge storage tank from top to bottom, the signal output end of the ultrasonic sludge level meter is electrically connected with the control end of the electric butterfly valve, and the ultrasonic sludge level meter can measure the sludge concentration of sewage in the sludge storage tank and send a control signal to the electric butterfly valve according to the measured sludge concentration of the sewage. The device is simple in structure and convenient in drainage, and can well reduce the moisture content of sludge before the sludge enters the dehydrator and reduce the transportation of the sludge dehydrator.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment and resource technology field especially, a device for reducing sludge moisture content. BACKGROUND

[0002] So far, the sludge dewatering on the market generally requires that the sludge moisture content is not more than 98%. The sludge moisture content of the primary sedimentation tank is generally 95% to 97%, the sludge moisture content of the residual sludge is generally 99.2% to 99.6%, and the sludge moisture content of the advanced treatment sludge is generally 90% to 97%. After mixing the three kinds of sludge, according to the conventional sewage sludge quantity and sludge moisture content calculation, the sludge moisture content after mixing is about 99%. In order to reduce the sludge moisture content and reduce the operation time of the sludge dewatering machine, the traditional process generally uses a sludge thickening tank for sludge thickening. However, the sludge thickening tank generally requires a design residence time of not less than 12 h. For a sewage treatment plant using activated sludge method for denitrification and phosphorus removal process, the phosphorus release reaction of the sludge thickening tank has a relatively large influence. For a small water quantity sewage treatment plant, the sludge thickening tank also increases the sewage treatment investment and land use, and increases the operation and maintenance difficulty.

[0003] Therefore, how to provide a device capable of reducing the sludge moisture content before entering the dewatering machine is a problem to be solved.

[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a device for reducing sludge moisture content, which can reduce the sludge moisture content before entering the dewatering machine, reduce the operation time of the sludge dewatering machine, and reduce the operation cost and maintenance cost of the sludge dewatering machine, thereby solving the above technical problems existing in the prior art.

[0006] The utility model aims at realizing the following technical scheme:

[0007] A device for reducing sludge moisture content, comprising:

[0008] A float water decanter, an ultrasonic sludge level meter, a drain pipe and an electric butterfly valve; wherein,

[0009] The float water decanter is floated on the sewage surface of the sludge storage tank, the drain port at the bottom of the float water decanter is connected with the drain pipe, the electric butterfly valve is arranged on the drain pipe, and the water outlet end of the drain pipe extends to the outside of the sludge storage tank;

[0010] The ultrasonic sludge level meter is inserted in the sludge storage tank from top to bottom, the signal output end is electrically connected with the control end of the electric butterfly valve, the sludge concentration of the sewage in the sludge storage tank can be measured, and the measured sludge concentration of the sewage is sent to the electric butterfly valve.

[0011] Compared with the prior art, the device for reducing the water content of sludge has the beneficial effects including:

[0012] By setting the float water decanter which can float on the sewage, cooperating with the ultrasonic sludge level meter and the electric butterfly valve on the drain pipe, the supernatant in the sludge storage tank can be well discharged, the water content of sludge is reduced, the operation time of the sludge dewatering machine is reduced, and the operation and maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical schemes of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0014] Figure 1 The device for reducing the water content of sludge provided by the embodiments of the present application is a structural schematic diagram.

[0015] In the figure, the marks are: 1-float water decanter; 2-float; 3-water decanting weir; 4-ultrasonic sludge level meter; 5-submersible mixer; 6-drain pipe; 7-electric butterfly valve; 8-sludge discharge pipe; 9-sludge storage tank; 10-valve well. DETAILED DESCRIPTION

[0016] The technical schemes in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments, which does not constitute a limitation to the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0017] Firstly, the terms possibly used in the present text are explained as follows:

[0018] The term "and / or" means either one or both, for example, X and / or Y means three cases including "X", "Y" or "X and Y".

[0019] The terms "comprise", "contain", "include", "have" or other similar semantic descriptions are to be construed as non-exclusive inclusion. For example, the inclusion of a technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, sizes, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.) should be interpreted as including not only the explicitly listed technical feature element, but also other technical feature elements not explicitly listed but known in the art.

[0020] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in a claim, the term will make the claim closed, so that it does not contain technical feature elements other than those explicitly listed, except for conventional impurities associated therewith. If the term only appears in a certain clause of the claim, it only limits the elements explicitly listed in that clause, and the elements described in other clauses are not excluded from the overall claim.

[0021] Unless otherwise expressly provided or limited, the terms "mount", "connect", "connect", "fix", and the like should be broadly understood, for example, as fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this paper can be understood according to the specific circumstances.

[0022] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of description, and do not mean or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting herein.

[0023] The following describes the scheme provided by the present application. The contents not described in detail in the embodiments of the present application are the prior art known to those skilled in the art. If no specific conditions are specified in the embodiments of the present application, the conditions are performed according to the conventional conditions in the art or the conditions recommended by the manufacturer. If no manufacturer of the reagent or instrument used in the embodiments of the present application is specified, it is a conventional product that can be purchased on the market.

[0024] As Figure 1As shown, the utility model discloses a device for reducing the moisture content of sludge, which is suitable for the reconstruction of a sewage plant without a sludge concentration tank and needing to reduce the moisture content of sludge, or a newly-built sewage plant with a small water volume or not suitable for building a sludge concentration tank, and comprises the following components.

[0025] The float water decanter 1, the ultrasonic sludge level meter 4, the drain pipe 6 and the electric butterfly valve 7 are connected, wherein

[0026] The float water decanter 1 is floating on the surface of sewage in the sludge storage tank 9, the drain port at the bottom of the float water decanter 1 is connected with the drain pipe 6, the electric butterfly valve 7 is arranged on the drain pipe 6, and the water outlet end of the drain pipe 6 extends to the outside of the sludge storage tank 9.

[0027] The ultrasonic sludge level meter 4 is inserted into the sludge storage tank 9 from top to bottom, the signal output end is electrically connected with the control end of the electric butterfly valve 7, the sludge concentration of sewage in the sludge storage tank 9 can be measured, and the electric butterfly valve 7 is controlled according to the measured sludge concentration of sewage.

[0028] Preferably, the device further comprises a submersible mixer 5 arranged in the sludge storage tank 9, which can mix and stir sewage and sludge.

[0029] Preferably, the device further comprises a sludge discharge pipe 8 extending into the bottom of the sludge storage tank 9 and extending to the outside of the sludge storage tank 9.

[0030] Preferably, the float water decanter 1 comprises:

[0031] The float 2 and the water decanting weir 3 are connected, wherein

[0032] The water decanting weir 3 is fixedly arranged at the middle lower end of the float 2, and the water decanting weir 3 is connected with the drain port.

[0033] Preferably, the device further comprises:

[0034] A valve well 10 is arranged outside the sludge storage tank 9, and the electric butterfly valve 7 is arranged in the valve well 10.

[0035] When the device is used, the residual sludge in the primary and secondary sedimentation tanks and the chemical sludge after deep treatment is discharged into the sludge storage tank, the submersible mixer is started after the sludge discharge is stopped, the mixed sludge is stirred for 10 min, the moisture content is about 99%, the stirring is stopped, and the sludge is allowed to stand; after standing for 4 hours, the electric butterfly valve is automatically opened, the float water decanter starts to discharge water, and the water is discharged outside; when the sludge concentration of sewage reaches 4000 mg / L, the ultrasonic sludge level meter sends a signal, the electric butterfly valve is automatically closed, and the float water decanter stops discharging water; the lower sludge is pumped to a sludge dewatering machine by a sludge screw pump for sludge dewatering.

[0036] The device for reducing the water content of sludge of the utility model, through setting the float decanter in the sludge storage pool, the float decanter is matched by the float decanter float and the decanting weir, the float ensures that the decanter can float on the water surface, and the decanting weir can let the supernatant overflow to enter the drain pipe.

[0037] In order to more clearly show the technical scheme provided by the utility model and the technical effect generated, the scheme provided by the utility model embodiment is described in detail below with specific examples.

[0038] Embodiment 1

[0039] The embodiment provides a device for reducing the water content of sludge, which can be used in the field of municipal wastewater dewatering treatment. Figure 1 As shown in the figure, the process main device is a float decanter and an electric butterfly valve.

[0040] The device sets the float decanter 1 in the sludge storage pool, sets the float 2 and the decanting weir 3 in the float decanter, makes the float decanter 1 float on the supernatant through the float 2, and makes the sewage flow into the drain pipe 6 connected to the bottom of the float decanter 1 through the decanting weir 3

[0041] The ultrasonic sludge level meter 4 is set in the sludge storage pool, the electric butterfly valve 7 is set on the drain pipe, and the signal output end of the ultrasonic sludge level meter 4 is electrically connected with the control end of the electric butterfly valve 7.

[0042] When the device is used, the residual sludge in the secondary sedimentation tank and the chemical sludge after depth treatment are discharged into the sludge storage pool 9, after stopping the sludge feeding, the submersible mixer 5 is started, the mixed sludge has a water content of about 99%, the stirring time is 10 min, the mixer 5 is stopped, and then the device is started to stand still.

[0043] From the above, it can be seen that, compared with the conventional wastewater treatment method, the device of the utility model embodiment has at least the following beneficial effects:

[0044] (1) By setting the float decanter and the electric butterfly valve, the sludge concentration tank can be omitted, and the investment of the wastewater treatment plant is reduced.

[0045] (2) The float decanter has simple structure, needs no maintenance and is convenient to operate;

[0046] (3) The drainage process is controlled by the ultrasonic sludge level meter and the electric butterfly valve, which is simple and easy to realize.

[0047] (4) The overall moisture content of the sludge can be reduced from 99% to 98%, and the sludge volume is reduced by half. The sludge dewatering time is reduced by half, the operation time of the sludge dewatering machine is reduced, and the operation cost is saved.

[0048] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. The information disclosed in the background section of the present application is merely intended to deepen the understanding of the overall background technology of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes the prior art known by the person skilled in the art.

Claims

1. An apparatus for reducing the moisture content of sludge, characterized in that, The utility model relates to a sewage sludge storage tank, which comprises: a float decanter (1), an ultrasonic sludge level meter (4), a drain pipe (6) and an electric butterfly valve (7); wherein, the float decanter (1) is floated on the sewage surface of a sludge storage tank (9), a drain port at the bottom of the float decanter (1) is connected with the drain pipe (6), the electric butterfly valve (7) is arranged on the drain pipe (6), and a water outlet end of the drain pipe (6) extends to the outside of the sludge storage tank (9); the ultrasonic sludge level meter (4) is inserted into the sludge storage tank (9) from top to bottom, a signal output end is electrically connected with a control end of the electric butterfly valve (7), the sewage sludge concentration in the sludge storage tank (9) can be measured, and a control signal is sent to the electric butterfly valve (7) according to the measured sewage sludge concentration.

2. The apparatus for reducing the moisture content of sludge according to claim 1, characterized by, Further comprising: a submersible mixer (5) arranged in the sludge storage tank (9) and capable of mixing and stirring sewage sludge.

3. The apparatus for reducing the moisture content of sludge according to claim 1, characterized by, Further comprising: a sludge discharge pipe (8) extending into the bottom of the sludge storage tank (9) and extending to the outside of the sludge storage tank (9).

4. The apparatus for reducing the water content of sludge according to any one of claims 1 to 3, characterized in that, The float decanter (1) comprises: a float (2) and a decanting weir (3); wherein, the decanting weir (3) is fixedly arranged at the middle lower end of the float (2), and a drain port is connected below the decanting weir (3).

5. The apparatus for reducing the water content of sludge according to any one of claims 1 to 3, characterized by, Further comprising: a valve well (10) arranged outside the sludge storage tank (9), and the electric butterfly valve (7) is arranged in the valve well (10).

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