Flocculation mixing device for stacked screw machine and stacked screw machine

Abstract

The utility model provides a flocculation mixing device for a stacked screw machine and the stacked screw machine, the flocculation mixing device comprises a flocculation mixing container, the flocculation mixing container is provided with a mixing cavity, a first sludge inlet, a coagulant aid feeding port and a sludge discharge port, and the first sludge inlet, the coagulant aid feeding port and the sludge discharge port are all communicated with the mixing cavity; the stirrer is arranged on the flocculation mixing container and is used for stirring the sludge and the coagulant aid in the mixing cavity; an inlet of the first sludge conveyor is communicated with the sludge discharge port, an outlet of the first sludge conveyor is used for being communicated with a second sludge inlet of the stacked screw machine, and the first sludge conveyor is used for conveying the sludge mixed by the flocculation mixing container to the stacked screw machine. According to the flocculation mixing tank, the reaction time of sludge and a coagulant aid can be prolonged, so that good alumen ustum is formed before the sludge is dewatered, the sludge dewatering efficiency is improved, and the problem of low sludge dewatering efficiency caused by insufficient reaction time of the sludge in the flocculation mixing tank of a stacked screw machine is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge dewatering, and particularly relates to a flocculation mixing device for a screw press and the screw press. BACKGROUND

[0002] The screw press is a device for dewatering sludge, and mainly comprises a metering tank, a flocculation mixing tank, a dewatering body and a sludge outlet. The sludge first enters the metering tank, the flow of the sludge is adjusted and controlled by the metering tank to ensure the stability of subsequent processing. The sludge flows from the metering tank into the flocculation mixing tank, where a high-molecular coagulant aid (such as polyacrylamide) is added. The stirring device in the flocculation mixing tank ensures that the sludge and the high-molecular coagulant aid are fully mixed to form uniform alum flowers, thereby improving the dewatering effect. The mixed sludge enters the dewatering body, which is usually composed of a spiral shaft formed by a fixed ring and a traveling ring. When the spiral shaft rotates, the gap between the fixed ring and the traveling ring gradually narrows, thereby applying pressure to the sludge to squeeze out water. The dewatered sludge is discharged from the sludge outlet to form a sludge cake with a low water content, which is convenient for transportation and disposal. In summary, the screw press realizes efficient dewatering of sludge through flocculation, stirring and pressing, and finally outputs a sludge cake with a low water content.

[0003] However, in actual application, it is found that the dewatering efficiency of the screw press is low for some different types of sludge. This phenomenon occurs because the reaction time of the sludge in the flocculation mixing tank is insufficient, and the sludge cannot fully react with the high-molecular coagulant aid. Since the screw press is a modular product, it cannot be designed according to the local conditions for different types of sludge, resulting in that the screw press cannot meet the use requirements of some sludge. CONTENT OF THE INVENTION

[0004] The present application provides a flocculation mixing device for a screw press and the screw press to solve the problems in the related art. The technical solution is as follows:

[0005] In a first aspect, the present application provides a flocculation mixing device for a screw press, comprising:

[0006] a flocculation mixing container, the flocculation mixing container having a mixing cavity, a first sludge inlet, a coagulant adding port and a sludge outlet, the first sludge inlet, the coagulant adding port and the sludge outlet all communicating with the mixing cavity;

[0007] a stirrer, the stirrer being arranged on the flocculation mixing container, the stirrer being used for stirring the sludge and the coagulant in the mixing cavity; and

[0008] A first sludge conveyor, an inlet of the first sludge conveyor is communicated with the sludge discharge port, an outlet of the first sludge conveyor is used for being communicated with a second sludge inlet of a spiral press, the first sludge conveyor is used for conveying the mixed sludge in the flocculation mixing container to the spiral press.

[0009] In an embodiment, the flocculation mixing device for the spiral press further comprises:

[0010] A liquid level detector, the liquid level detector is arranged on the flocculation mixing container, the liquid level detector is used for detecting a liquid level of the mixing cavity, and the first sludge conveyor is used for being stopped according to low liquid level feedback information of the liquid level detector.

[0011] In an embodiment, the agitator is used for being started according to high liquid level feedback information of the liquid level detector.

[0012] In an embodiment, the flocculation mixing device for the spiral press further comprises:

[0013] A second sludge conveyor, an inlet of the second sludge conveyor is communicated with a sludge storage device, an outlet of the second sludge conveyor is communicated with the first sludge inlet, the second sludge conveyor is used for being started according to low liquid level feedback information of the liquid level detector, and the second sludge conveyor is further used for being stopped according to high liquid level feedback information of the liquid level detector.

[0014] In an embodiment, the second sludge conveyor comprises a second sludge conveying pump.

[0015] In an embodiment, the liquid level detector is an ultrasonic liquid level meter.

[0016] In an embodiment, the liquid level detector is a static pressure liquid level meter.

[0017] In an embodiment, the first sludge conveyor comprises a first sludge conveying pump.

[0018] In a second aspect, an embodiment of the present application provides a spiral press, comprising the flocculation mixing device for the spiral press.

[0019] The advantages or beneficial effects of the above technical solutions at least include:

[0020] The flocculation mixing device of the utility model, before sludge is transported to the spiral press, make sludge pass through the first sludge inlet and be transported to the mixing chamber, at the same time, make the coagulant pass through the coagulant dosing port and be transported to the mixing chamber, then start the stirrer, make the sludge and the coagulant stir uniformly by the stirrer, make the sludge and the coagulant mix fully, form good alum flower, after that, transport the sludge mixed fully with the coagulant to the spiral press by the first sludge conveyor, then make the sludge flocculate, stir and press by the spiral press, ensure that the sludge can be dehydrated efficiently, wherein, the setting of the flocculation mixing device adds a mixing procedure to the spiral press, can increase the reaction time of the sludge and the coagulant, make the sludge form good alum flower before dehydration, improve the efficiency of sludge dehydration, solve the problem of low sludge dehydration efficiency caused by the insufficient reaction time of the sludge in the flocculation mixing tank, under the premise of not reforming the structure of the spiral press itself, by adding the flocculation mixing device, the spiral press can be adapted to meet the dehydration needs of different types of sludge.

[0021] The above summary is intended to illustrate only and is not intended to be limiting in any way. Further aspects, implementations, and features of the present application will be apparent to those skilled in the art upon reading the detailed description in conjunction with the accompanying drawings and claims. BRIEF DESCRIPTION OF DRAWINGS

[0022] In the drawings, like numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed on illustrating the principles of the application. It should be understood that the drawings are merely depictions of some embodiments of the application and should not be construed as limiting the scope of the application.

[0023] Figure 1 Structure diagram of the flocculation mixing device of the utility model.

[0024] REFERENCE NUMERALS

[0025] 1, flocculation mixing container; 11, first sludge inlet; 12, coagulant dosing port; 13, sludge discharge port; 2, stirrer; 3, first sludge conveyor; 4, liquid level detector. DETAILED DESCRIPTION

[0026] In the following, only certain example embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature and not limiting.

[0027] Reference Figure 1 , a flocculation mixing device for a spiral press in a preferred embodiment of the utility model is shown, comprising:

[0028] The flocculation mixing container 1 has a mixing cavity, a first sludge inlet 11, a coagulant dosing port 12 and a sludge discharge port 13, and the first sludge inlet 11, the coagulant dosing port 12 and the sludge discharge port 13 all communicate with the mixing cavity;

[0029] The stirrer 2 is arranged on the flocculation mixing container 1 and is used for stirring the sludge and the coagulant in the mixing cavity so that the sludge and the coagulant are fully mixed; and

[0030] The first sludge conveyor 3 has an inlet communicating with the sludge discharge port 13 and an outlet used for communicating with a second sludge inlet of the screw press, and is used for conveying the sludge mixed in the flocculation mixing container 1 to the screw press.

[0031] The flocculation mixing device of the utility model, before the sludge is conveyed to the screw press, the sludge is conveyed to the mixing cavity through the first sludge inlet 11, and the coagulant is conveyed to the mixing cavity through the coagulant dosing port 12, then the stirrer 2 is started, the sludge and the coagulant are stirred uniformly by the stirrer 2, the sludge and the coagulant are fully mixed, after the good alum flower is formed, the sludge fully mixed with the coagulant is conveyed to the screw press through the first sludge conveyor 3, and the sludge is flocculated, stirred and pressed by the screw press, so that the sludge can be efficiently dewatered, wherein the setting of the flocculation mixing device adds a mixing process to the screw press, the reaction time of the sludge and the coagulant can be increased, the sludge can form a good alum flower before dewatering, the efficiency of sludge dewatering is improved, the problem of low sludge dewatering efficiency caused by the insufficient reaction time of the sludge in the flocculation mixing tank of the screw press is solved, and under the premise that the screw press itself is not structurally modified, the screw press can be adapted to meet the dewatering requirements of different types of sludge by adding the flocculation mixing device.

[0032] Referring to Figure 1 In an embodiment, the flocculation mixing device for the screw press further comprises:

[0033] The liquid level detector 4 is arranged on the flocculation mixing container 1 and is used for detecting the liquid level of the mixing cavity, and the first sludge conveyor 3 is used for being stopped according to the low liquid level feedback information of the liquid level detector 4, that is, in the case that the liquid level detector 4 detects that the mixing cavity is in a low liquid level, the liquid level detector 4 feeds back the low liquid level information to the control system of the flocculation mixing device or the screw press, the control system controls the first sludge conveyor 3 to be stopped according to the low liquid level information, so as to prevent the first sludge conveyor 3 from idling and to protect the first sludge conveyor 3; and the starting of the first sludge conveyor 3 is controlled by a preset time program of the control system, and the time program ensures that the sludge and the coagulant are fully mixed to form a good alum flower.

[0034] In an embodiment, the agitator 2 is used to start according to the high liquid level feedback information of the liquid level detector 4, that is, after the liquid level detector 4 detects that the sludge in the mixing chamber reaches the set high liquid level, the liquid level detector 4 feeds back the high liquid level information to the control system of the flocculation mixing device or the spiral press, and the control system controls the agitator 2 to start according to the high liquid level feedback information, so that the agitator 2 stirs the sludge and the coagulant in the mixing chamber until the running time of the agitator 2 reaches the preset set time of the control system, so that the sludge and the coagulant are fully mixed to form good alum flowers, and the control system controls the agitator 2 to stop, and at the same time, the control system controls the first sludge conveyor 3 to start to convey the uniformly mixed sludge to the spiral press by using the first sludge conveyor 3.

[0035] In an embodiment, the flocculation mixing device for the spiral press further comprises:

[0036] A second sludge conveyor (not shown in the figure), the inlet of the second sludge conveyor is used to communicate with the sludge storage device, and the outlet of the second sludge conveyor communicates with the first sludge inlet 11, the second sludge conveyor is used to start according to the low liquid level feedback information of the liquid level detector 4, and the second sludge conveyor is also used to stop according to the high liquid level feedback information of the liquid level detector 4, that is, in the case that the liquid level detector 4 detects that the sludge in the mixing chamber is at a low liquid level, the liquid level detector 4 feeds back the low liquid level information to the control system of the flocculation mixing device or the spiral press, and the control system controls the second sludge conveyor to start and the first sludge conveyor 3 to stop according to the low liquid level information, so as to convey the sludge of the sludge storage device to the mixing chamber by using the second sludge conveyor, and in the case that the liquid level detector 4 detects that the sludge in the mixing chamber reaches a high liquid level, the liquid level detector 4 feeds back the high liquid level information to the control system of the flocculation mixing device or the spiral press, and the control system controls the second sludge conveyor to stop according to the high liquid level information, so as to stop conveying the sludge of the sludge storage device to the mixing chamber, which can realize automatic input of the sludge and improve the input efficiency of the sludge, and at the same time, the labor intensity can be reduced.

[0037] Of course, in other embodiments, the sludge of the sludge storage device can also be conveyed to the mixing chamber through the first sludge inlet 11 by manual manual mode.

[0038] In an embodiment, the second sludge conveyor comprises a second sludge conveying pump, which can realize efficient conveying of the sludge, and at the same time, the second sludge conveying pump has the advantages of stable operation, low failure rate and low maintenance cost, which can improve the operation stability and operation cost of the flocculation mixing device.

[0039] Of course, in other embodiments, the second sludge conveyor can also be a sprayer, a siphon, a screw conveyor, etc.

[0040] In an embodiment, the liquid level detector 4 is an ultrasonic liquid level meter, which measures the liquid level by emitting ultrasonic waves and receiving echoes, and has the following advantages: no direct contact with the measured liquid, avoiding pollution and corrosion, increasing the service life of the ultrasonic liquid level meter, and reducing the operating cost of the flocculation mixing device; simple installation, only needs to be installed on the top of the flocculation mixing container 1, without complex debugging; the ultrasonic liquid level meter has a precision of millimeter level, meeting the high-precision requirement; simple structure, low maintenance cost, high reliability, and low cost of the flocculation mixing device.

[0041] In an embodiment, the liquid level detector 4 can also be a static pressure liquid level meter, which calculates the liquid level by measuring the liquid static pressure, and has the following advantages: simple structure, easy installation, high precision, strong adaptability, and low cost, and can reduce the cost of the flocculation mixing device.

[0042] Of course, in other embodiments, the liquid level detector 4 can also be any one of a radar liquid level meter, a float liquid level meter, a capacitive liquid level meter, a guided wave radar liquid level meter, a laser liquid level meter, etc.

[0043] In an embodiment, the first sludge conveyor 3 includes a first sludge conveying pump, which can realize efficient conveying of sludge, and has the advantages of stable operation, low failure rate, and low maintenance cost, thereby improving the operation stability and operation cost of the flocculation mixing device.

[0044] Of course, in other embodiments, the first sludge conveyor 3 can also be a structure such as an ejector, a siphon, or a screw conveyor.

[0045] The utility model provides a kind of stacking machine, including the flocculation mixing device for stacking machine described above.

[0046] The flocculation mixing device is arranged on the sludge stacking machine, so that a mixing process is added to the sludge stacking machine, the reaction time of the sludge and the coagulant is increased, the sludge can form good alum flowers before dewatering, the dewatering efficiency of the sludge is improved, and the problem that the dewatering efficiency of the sludge is low due to the insufficient reaction time of the sludge in the flocculation mixing tank is solved; and under the premise that the structure of the sludge stacking machine is not changed, the sludge stacking machine can be adapted to meet the dewatering requirements of different types of sludge by adding the flocculation mixing device.

[0047] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0048] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0049] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered within 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.

Claims

1. A flocculation mixing device for a screw press, characterized by, The flocculation mixing device for the spiral digester comprises: a flocculation mixing container having a mixing cavity, a first sludge inlet, a coagulant feeding port and a sludge outlet, the first sludge inlet, the coagulant feeding port and the sludge outlet all communicating with the mixing cavity; a stirrer arranged on the flocculation mixing container, the stirrer being used for stirring the sludge and the coagulant in the mixing cavity; and a first sludge conveyor, an inlet of the first sludge conveyor communicating with the sludge outlet, an outlet of the first sludge conveyor being used for communicating with a second sludge inlet of a spiral digester, the first sludge conveyor being used for conveying the sludge mixed by the flocculation mixing container to the spiral digester.

2. The flocculating mixing device for a screw press according to claim 1, wherein The flocculation mixing device for the spiral digester further comprises: a liquid level detector arranged on the flocculation mixing container, the liquid level detector being used for detecting a liquid level of the mixing cavity, the first sludge conveyor being used for shutting down according to low liquid level feedback information of the liquid level detector.

3. The flocculating mixing device for a screw press according to claim 2, wherein The stirrer is used for starting according to high liquid level feedback information of the liquid level detector.

4. The flocculating mixing device for a screw press according to claim 2, wherein The flocculation mixing device for the spiral digester further comprises: a second sludge conveyor, an inlet of the second sludge conveyor being used for communicating with a sludge storage device, an outlet of the second sludge conveyor communicating with the first sludge inlet, the second sludge conveyor being used for starting according to low liquid level feedback information of the liquid level detector, the second sludge conveyor being further used for shutting down according to high liquid level feedback information of the liquid level detector.

5. The flocculating mixing device for a screw press according to claim 4, wherein The second sludge conveyor comprises a second sludge conveying pump.

6. The flocculating mixing device for a screw press according to claim 2, wherein The liquid level detector is an ultrasonic liquid level meter.

7. The flocculating mixing device for a screw press according to claim 2, wherein The liquid level detector is a static pressure liquid level meter.

8. The flocculating mixing device for a screw press according to claim 1, wherein The first sludge conveyor comprises a first sludge conveying pump.

9. A layup machine characterized by, The flocculation mixing device for the spiral digester comprises any one of claims 1-8.

Images