Aerobic sludge treatment system

Abstract

The utility model discloses an aerobic sludge treatment system which comprises an aerobic tank, a sedimentation tank and a sludge sorting device, the aerobic tank is communicated with the sedimentation tank, the sedimentation tank is provided with a sludge outlet and a sedimentation tank water outlet, the sludge outlet is used for discharging aerobic sludge settled in the sedimentation tank, and the sludge sorting device is communicated with the sludge outlet. The sludge outlet is used for conveying aerobic sludge into the sludge sorting device, and the sludge sorting device is used for separating heavy sludge with relatively heavy weight from light sludge with relatively light weight in the aerobic sludge. A sludge mixture in the aerobic tank is introduced into the sedimentation tank to be settled, the settled aerobic sludge is conveyed to the sludge sorting device to be sorted, and the sludge sorting device is used for separating heavier heavy sludge and lighter light sludge in the aerobic sludge. And the operation of the aerobic tank does not need to be stopped, so that production halt loss is avoided, the risk of blockage of the aeration system is reduced, and the cost of tank cleaning and maintenance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to an aerobic sludge treatment system. Background Art

[0002] In the production process of some industries, especially the papermaking industry, high-calcium wastewater is produced. In the related art, high-calcium wastewater is treated in an aerobic tank, resulting in the interception of more calcium carbonate in the aerobic sludge in the aerobic tank, causing the proportion of calcium carbonate in the sludge to increase and the content of microorganisms to decrease. The overall content of microorganisms in the aerobic sludge is reduced, resulting in a decrease in the ability of the sludge to treat organic pollutants, serious sludge aging, and excessive effluent due to the carrying of inorganic particles in the effluent. Moreover, the severely calcified aerobic sludge tends to sink to the bottom of the aerobic tank, causing the aeration system at the bottom of the tank to be blocked, and the aerobic tank is not stirred sufficiently to form a dead zone, causing the aerobic tank to fail or the maintenance frequency to increase, reducing the service life of the aerobic aeration system and increasing the maintenance cost. In order to solve the above problems, the conventional practice in the related art is to stop the operation of the aerobic tank regularly and clean the sludge at the bottom out of the aerobic tank, but this method is bound to cause losses due to the suspension and restriction of production in the front-end workshop, and frequent maintenance increases the maintenance cost. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides an aerobic sludge treatment system, which does not need to stop the operation of the aerobic pool, thereby reducing the cost of pool cleaning and maintenance.

[0004] The aerobic sludge treatment system of the embodiment of the utility model includes: an aerobic tank, the aerobic tank has an aerobic water inlet; a sedimentation tank, the aerobic tank is connected to the sedimentation tank, the sedimentation tank has a sludge outlet and a sedimentation tank water outlet, the sludge outlet is used to discharge the aerobic sludge precipitated in the sedimentation tank; a sludge sorting device, the sludge sorting device is connected to the sludge outlet, the sludge outlet is used to transport aerobic sludge to the sludge sorting device, and the sludge sorting device separates the heavier heavy sludge from the lighter light sludge in the aerobic sludge.

[0005] The aerobic sludge treatment system of the embodiment of the utility model passes the sludge mixture in the aerobic tank into the sedimentation tank for precipitation, and the precipitated aerobic sludge is transported to the sludge sorting device for sorting. The sludge sorting device separates the heavier heavy sludge and the lighter light sludge in the aerobic sludge. The aerobic sludge treatment system of the embodiment of the utility model is used to treat the aerobic sludge without stopping the operation of the aerobic tank, thus avoiding production suspension losses, reducing the risk of blockage of the aeration system, and reducing the cost of pool cleaning and maintenance.

[0006] In some embodiments, the sludge sorting device is a cyclone separation device, and the cyclone separation device is used to perform cyclone separation on the aerobic sludge.

[0007] In some embodiments, the cyclone separation device includes a cyclone device and a slag collection device. The cyclone device is located above the slag collection device and is connected thereto. The outlet of the sedimentation tank is connected to the cyclone device. The cyclone device is used for cyclone separation, and the separated heavy mud containing calcium carbonate is discharged downward into the slag collection device.

[0008] In some embodiments, the swirling sand separation device also includes an upper slag discharge valve and a lower slag discharge valve. The upper slag discharge valve is arranged between the swirling device and the slag collecting device, and is used to control the slag discharge from the swirling device to the slag collecting device. The lower slag discharge valve is arranged at the bottom of the slag collecting device, and is used to control the slag collecting device to discharge slag outward.

[0009] In some embodiments, the aerobic sludge treatment system includes: a slag discharge pipe, which is connected to the bottom outlet of the slag collection equipment, and the lower slag discharge valve is arranged on the slag discharge pipe and adjacent to the bottom outlet of the slag collection equipment; a backwash water pipeline, which is connected to the slag discharge pipe, and the connection with the slag discharge pipe is located downstream of the lower slag discharge valve.

[0010] In some embodiments, the aerobic sludge treatment system includes: a balancing water pipeline, which is connected to the cyclone device and is used to input balancing water into the cyclone device to adjust the cyclone pressure in the cyclone device; a flushing water pipeline, which is connected to the slag collection device and is used to input flushing water into the slag collection device to flush the slag collection device.

[0011] In some embodiments, the aerobic sludge treatment system includes: a first pressure gauge, the first pressure gauge is used to monitor the pressure at the inlet of the sludge sorting device; and a second pressure gauge, the second pressure gauge is used to monitor the pressure at the light mud outlet of the sludge sorting device.

[0012] In some embodiments, the aerobic sludge treatment system includes: a first regulating valve, which is arranged at the inlet of the sludge sorting device to adjust the pressure at the inlet of the sludge sorting device; and a second regulating valve, which is arranged at the light mud outlet of the sludge sorting device to adjust the pressure at the light mud outlet of the sludge sorting device.

[0013] In some embodiments, the separated heavy sludge is transported to a sludge dewatering unit.

[0014] In some embodiments, the separated light sludge is transported to the aerobic tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an aerobic sludge treatment system according to an embodiment of the utility model.

[0016] Reference numerals:

[0017] Aerobic sludge treatment system 100,

[0018] Aerobic tank 1, aerobic water inlet 11, sedimentation tank 2, sludge outlet 21, sedimentation tank outlet 22, cyclone separation device 3, cyclone equipment 31, slag collecting equipment 32, upper slag discharge valve 33, lower slag discharge valve 34, sludge conveying pipeline 41, light mud conveying pipeline 42, balancing water pipeline 43, flushing water pipeline 44, slag discharge pipe 45, backwashing water pipeline 46, water tank 5, first pressure gauge 61, second pressure gauge 62, first regulating valve 71, second regulating valve 72, reflux pump 8. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0020] Refer to the following Figure 1 An aerobic sludge treatment system 100 according to an embodiment of the present invention is described. The aerobic sludge treatment system 100 includes an aerobic tank 1, a sedimentation tank 2 and a sludge sorting device.

[0021] The aerobic tank 1 has an aerobic water inlet 11, and the aerobic tank 1 is connected to the sedimentation tank 2. The sludge is lined in the sedimentation tank 2. The sedimentation tank 2 has a sludge outlet 21 and a sedimentation tank outlet 22. The sludge outlet 21 is used to discharge the aerobic sludge precipitated in the sedimentation tank 2, and the sedimentation tank outlet 22 is used to discharge the upper layer of water after precipitation.

[0022] The sludge sorting device is connected to the sludge outlet 21, and the sludge outlet 21 is used to transport aerobic sludge to the sludge sorting device, and the sludge sorting device separates heavy sludge with a heavier weight from light sludge with a lighter weight in the aerobic sludge. The heavy sludge is sludge with a higher content of inorganic matter (such as calcium carbonate), and the light sludge is sludge with a lower content of inorganic matter, and the microbial content in the light sludge is better.

[0023] The aerobic sludge treatment system of the embodiment of the utility model passes the sludge mixture in the aerobic tank into the sedimentation tank for precipitation, and the precipitated aerobic sludge is transported to the sludge sorting device for sorting. The sludge sorting device separates the heavier heavy sludge and the lighter light sludge in the aerobic sludge. The aerobic sludge treatment system of the embodiment of the utility model is used to treat the aerobic sludge without stopping the operation of the aerobic tank, thus avoiding production suspension losses, reducing the risk of blockage of the aeration system, and reducing the cost of pool cleaning and maintenance.

[0024] Optionally, the heavy sludge separated by the sludge sorting device is transported to a sludge dewatering unit for dehydration.

[0025] Optionally, the light sludge separated by the sludge sorting device is transported to the aerobic tank 1. The light sludge contains a large number of microorganisms. Returning the light sludge to the aerobic tank 1 can increase the content of effective microorganisms in the aerobic tank 1.

[0026] In some embodiments, Figure 1 As shown, the sludge sorting device is a cyclone separator 3, which is used to perform cyclone separation on aerobic sludge to obtain light sludge containing microorganisms and heavy sludge containing calcium carbonate.

[0027] In some specific examples, such as Figure 1 As shown, the cyclone separation device 3 includes a cyclone device 31 and a slag collecting device 32. The cyclone device 31 is located above the slag collecting device 32 and is connected thereto. The sludge outlet 21 of the sedimentation tank 2 is connected to the cyclone device 31. The cyclone device 31 is used for cyclone separation. The heavy mud containing calcium carbonate separated from the cyclone is discharged downward into the slag collecting device 32. The slag collecting device 32 collects the heavy mud separated from the cyclone and discharges it.

[0028] like Figure 1 As shown, the slag separation device 3 further includes an upper slag discharge valve 33 and a lower slag discharge valve 34. The upper slag discharge valve 33 is arranged between the slag collection device 31 and the slag collection device 32, and is used to control the slag discharge from the slag collection device 32 to the slag collection device 32. The lower slag discharge valve 34 is arranged at the bottom of the slag collection device 32, and is used to control the slag collection device 32 to discharge slag outwards. When the lower slag discharge valve 34 is opened, the slag collection device 32 discharges slag outwards.

[0029] When the cyclone device 31 is performing the cyclone separation operation, the upper slag discharge valve 33 is closed. After the cyclone device 31 completes the cyclone separation operation, the upper slag discharge valve 33 is opened, and the cyclone device 31 discharges slag to the slag collection device 32, that is, the heavier heavy mud at the bottom of the cyclone device 31 after separation is discharged into the slag collection device 32, and the lower slag discharge valve 34 remains closed at this time. When the heavy mud in the slag collection device 32 accumulates to a certain level, the lower slag discharge valve 34 is opened, and the slag collection device 32 discharges the heavy mud to the outside, and the discharged heavy mud can be directly transported out after drying.

[0030] In some embodiments, Figure 1 As shown, the aerobic sludge treatment system 100 includes a balancing water pipeline 43 and a flushing water pipeline 44. The balancing water pipeline 32 is connected to the cyclone device 31 and is used to input balancing water into the cyclone device 31 to adjust the cyclone pressure in the cyclone device 31. The flushing water pipeline 44 is connected to the slag collection device 43 and is used to input flushing water into the slag collection device 43 to flush the slag collection device 43.

[0031] As an example, the balancing water pipeline 32 is connected to the bottom of the cyclone device 31 to prevent the water flow when the balancing water is input from affecting the cyclone operation in the cyclone device 31. The flushing water pipeline 44 is connected to the upper position of the slag collecting device 43 to fully flush the slag collecting device 43.

[0032] Furthermore, if Figure 1 As shown, the aerobic sludge treatment system 100 includes a slag discharge pipe 45 and a backwash water pipeline 46, wherein the slag discharge pipe 45 is connected to the bottom outlet of the slag collection device 32 for discharging heavy mud, and the lower slag discharge valve 34 is arranged on the slag discharge pipe 45 and adjacent to the bottom outlet of the slag collection device 32. The backwash water pipeline 46 is connected to the slag discharge pipe 45, and the connection with the slag discharge pipe 45 is located downstream of the lower slag discharge valve 34. The backwash water pipeline 46 is used to backwash the slag discharge pipe 45 and the slag collection device 32.

[0033] exist Figure 1 In the example shown, the balancing water pipeline 43 , the flushing water pipeline 44 and the backwashing water pipeline 46 are all in communication with the water tank 5 .

[0034] In some embodiments, Figure 1 As shown, the aerobic sludge treatment system 100 includes a first pressure gauge 61 and a second pressure gauge 62. The first pressure gauge 61 is used to monitor the sludge sorting device ( Figure 1 The second pressure gauge 62 is used to monitor the pressure at the inlet of the cyclone separation device 3), and the second pressure gauge 62 is used to monitor the pressure at the light mud outlet of the sludge sorting device.

[0035] exist Figure 1 In the illustrated embodiment, the sludge outlet 21 of the sedimentation tank 2 is connected to the inlet of the cyclone 3 via a sludge conveying pipeline 41, wherein a reflux pump 8 for sludge reflux is connected to the sludge conveying pipeline 41. A first pressure gauge 61 is provided at a position of the sludge conveying pipeline 41 adjacent to the inlet of the cyclone 3, and the pressure measured by the first pressure gauge 61 is used as the pressure at the inlet of the cyclone 3.

[0036] The light mud outlet of the whirl sand separation device 3 and the aerobic pool 1 are connected through the light mud conveying pipeline 42. The second pressure gauge 62 is arranged at a position of the light mud conveying pipeline 42 adjacent to the light mud outlet of the whirl sand separation device 3. The pressure measured by the second pressure gauge 62 is used as the pressure at the light mud outlet of the whirl sand separation device 3.

[0037] In some embodiments, the aerobic sludge treatment system 100 includes a first regulating valve 71 and a second regulating valve 72. The first regulating valve 71 is provided in the sludge sorting device ( Figure 1 The second regulating valve 72 is provided at the inlet of the sludge separation device ( Figure 1The light mud outlet of the whirling sand separation device 3) is used to adjust the pressure at the light mud outlet of the whirling sand separation device 3.

[0038] exist Figure 1 In the illustrated embodiment, the first regulating valve 71 is disposed at a position of the calcium carbonate conveying pipeline 42 adjacent to the whirl sand separation device 3, and can regulate the pressure at the inlet of the whirl sand separation device 3. The second regulating valve 72 is disposed at a position of the light mud output pipeline 47 adjacent to the light mud outlet of the whirl sand separation device 3, and can regulate the pressure at the light mud outlet of the whirl sand separation device 3.

[0039] By adjusting the first regulating valve 71 and the second regulating valve 72, the pressure difference between the feed and discharge of the whirling sand separation device 3 can be controlled to adjust the ratio of light mud and heavy mud separated by the whirling sand separation device 3 and the organic matter content in the slag.

[0040] In addition, the slag discharge amount of the whirling sand separation device 3 can be controlled by controlling the whirling sand separation device 3's ...

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An aerobic sludge treatment system, characterized in that: include: an aerobic pool, wherein the aerobic pool has an aerobic water inlet; A sedimentation tank, wherein the aerobic tank is connected to the sedimentation tank, the sedimentation tank has a sludge outlet and a sedimentation tank water outlet, and the sludge outlet is used to discharge the aerobic sludge precipitated in the sedimentation tank; A sludge sorting device is connected to the sludge outlet, and the sludge outlet is used to transport aerobic sludge to the sludge sorting device. The sludge sorting device separates heavy sludge with a heavier weight from light sludge with a lighter weight in the aerobic sludge.

2. The aerobic sludge treatment system according to claim 1, characterized in that: The sludge sorting device is a cyclone separation device, and the cyclone separation device is used to perform cyclone separation on the aerobic sludge.

3. The aerobic sludge treatment system according to claim 2, characterized in that: The cyclone separation device includes a cyclone device and a slag collection device. The cyclone device is located above the slag collection device and is connected thereto. The outlet of the sedimentation tank is connected to the cyclone device. The cyclone device is used for cyclone separation, and the separated heavy mud containing calcium carbonate is discharged downward into the slag collection device.

4. The aerobic sludge treatment system according to claim 3, characterized in that: The slag separation device also includes an upper slag discharge valve and a lower slag discharge valve. The upper slag discharge valve is arranged between the slag collection device and the slag collection device, and is used to control the slag discharge from the slag collection device to the slag collection device. The lower slag discharge valve is arranged at the bottom of the slag collection device, and is used to control the slag collection device to discharge slag outward.

5. The aerobic sludge treatment system according to claim 4, characterized in that: include: A slag discharge pipe, the slag discharge pipe is connected to the bottom outlet of the slag collection device, and the lower slag discharge valve is arranged on the slag discharge pipe and adjacent to the bottom outlet of the slag collection device; A backwash water pipeline is connected to the slag discharge pipe, and the connection between the backwash water pipeline and the slag discharge pipe is located downstream of the lower slag discharge valve.

6. The aerobic sludge treatment system according to claim 3, characterized in that: include: A balancing water pipeline, the balancing water pipeline is connected to the cyclone device and is used to input balancing water into the cyclone device to adjust the cyclone pressure in the cyclone device; A flushing water pipeline is connected to the slag collecting equipment and is used to input flushing water into the slag collecting equipment to flush the slag collecting equipment.

7. The aerobic sludge treatment system according to claim 1 or 2, characterized in that: include: a first pressure gauge, the first pressure gauge being used to monitor the pressure at the inlet of the sludge sorting device; A second pressure gauge is used to monitor the pressure at the light mud outlet of the sludge sorting device.

8. The aerobic sludge treatment system according to claim 7, characterized in that: include: a first regulating valve, the first regulating valve being arranged at the inlet of the sludge sorting device and being used for regulating the pressure at the inlet of the sludge sorting device; A second regulating valve is provided at the light mud outlet of the sludge sorting device and is used to adjust the pressure at the light mud outlet of the sludge sorting device.

9. The aerobic sludge treatment system according to claim 1, characterized in that: The separated heavy sludge is transported to the sludge dewatering unit.

10. The aerobic sludge treatment system according to claim 1, characterized in that: The separated light mud is transported to the aerobic tank.

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