Conveying system and method suitable for wet sludge with different water contents

Abstract

The invention discloses a conveying system and method suitable for wet sludge with different water contents. The conveying system comprises a low-water-content wet sludge bin, a high-water-content wet sludge bin, a mixing stirrer, a plunger pump, a sludge drying machine and a wastewater pool. An outlet of the low-water-content wet sludge bin and an outlet of the high-water-content wet sludge bin are communicated with an inlet of the mixing stirrer; an outlet of the mixing stirrer is communicated with an inlet of the plunger pump; an outlet of the plunger pump is communicated with an inlet of the sludge drying machine, a film injection device is arranged on a connecting pipeline of the plunger pump and the sludge drying machine, and an inlet of the film injection device is communicated with an outlet of the wastewater pool. Wet sludge with different water contents can be stably conveyed through a single conveying path, and practicability and economical efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the field of sludge disposal and relates to a conveying system and method suitable for wet sludge with different moisture contents. Background Art

[0002] Sludge is a thick substance between liquid and solid produced when wastewater is treated by physical, chemical and biological methods. It contains a large amount of water and is generally produced in sewage treatment plants. At present, in order to facilitate classified storage and treatment, sludge is divided into wet sludge with a moisture content of 80% and dry sludge with a moisture content of 60%. For wet sludge with a moisture content of 80%, due to its good fluidity, it is usually transported to the sludge disposal device in the form of a plunger pump. However, due to the different treatment technologies and methods of sewage treatment plants in various places, the actual output of wet sludge often fluctuates between 70% and 85%. When the sludge moisture content is lower than 78%, the sludge has poor fluidity and a certain viscosity, which makes sludge transportation difficult and aggravates equipment loss. Usually, multiple sludge transportation paths are required to achieve stable sludge transportation. However, multiple sludge transportation paths undoubtedly increase the land area and investment amount, and are less practical and economical. Therefore, there is an urgent need to propose a sludge conveying system that can still use a single conveying path to stably convey the sludge when the wet sludge fluctuates between 70% and 85%. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a conveying system and method suitable for wet sludge with different moisture contents. The system and method can reasonably blend and evenly mix wet sludge with different moisture contents, so that wet sludge with different moisture contents can be stably conveyed through a single conveying path, thereby improving practicality and economy.

[0004] To achieve the above object, the present invention discloses a conveying system suitable for wet sludge with different moisture contents, comprising a low-moisture-content wet sludge bin, a high-moisture-content wet sludge bin, a mixing agitator, a plunger pump, a sludge dryer and a wastewater tank;

[0005] The outlet of the low-moisture content wet sludge bin and the outlet of the high-moisture content wet sludge bin are connected to the inlet of the mixing agitator; the outlet of the mixing agitator is connected to the inlet of the plunger pump; the outlet of the plunger pump is connected to the inlet of the sludge dryer, and a film injection device is arranged on the connecting pipeline between the plunger pump and the sludge dryer, and the inlet of the film injection device is connected to the outlet of the wastewater tank.

[0006] The conveying system for wet sludge with different moisture contents of the present invention is further improved in that:

[0007] Furthermore, the outlet of the low-moisture content wet sludge bin is connected to the low-moisture content inlet of the mixing agitator via the low-moisture content wet sludge screw conveyor.

[0008] Furthermore, the outlet of the high-moisture-content wet sludge bin is connected to the high-moisture-content inlet of the mixing agitator via the high-moisture-content wet sludge screw conveyor.

[0009] Furthermore, a pressure measuring point is arranged at the outlet pipe of the plunger pump.

[0010] Furthermore, the membrane injection device is located between the pressure measuring point and the sludge dryer.

[0011] Furthermore, the inlet of the membrane injection device is connected to the outlet of the wastewater pool via a water pump.

[0012] The invention discloses a method for conveying wet sludge with different moisture contents, comprising the following steps:

[0013] The sludge in the low-moisture content wet sludge bin is transported to the mixing agitator, and the sludge in the high-moisture content wet sludge bin is transported to the mixing agitator. The wet sludges with different moisture contents are squeezed and stirred in the mixing agitator to form wet sludge with a moisture content of not less than 78%. The wet sludge with a moisture content of not less than 78% is transported to the sludge dryer through the plunger pump.

[0014] The method for conveying wet sludge with different moisture contents described in the present invention is further improved in that:

[0015] Furthermore, a pressure measuring point is arranged at the outlet pipe of the plunger pump.

[0016] Furthermore, the membrane injection device is located between the pressure measuring point and the sludge dryer.

[0017] Furthermore, when the moisture content of the sludge at the outlet of the plunger pump is lower than 78%, the pressure measuring point sends an interlocking signal to the low-moisture-content wet sludge screw conveyor and the high-moisture-content wet sludge screw conveyor to automatically adjust the low / high-moisture-content wet sludge mixing ratio. At the same time, the pressure measuring point sends an interlocking signal to the water pump, and the water pump draws wastewater from the wastewater pool to supply the membrane injection device, ensuring that the sludge with a moisture content lower than 78% can be smoothly transported to the sludge dryer.

[0018] The present invention has the following beneficial effects:

[0019] The conveying system and method for wet sludge with different moisture contents described in the present invention can accurately mix wet sludge with different moisture contents by automatic adjustment during specific operation, and use a membrane injection device to ensure smooth sludge conveying pipelines, so that sludge with a moisture content in the range of 70% to 85% can be normally transported through this set of sludge conveying paths, solving the problem that the sludge conveying system cannot be used for sludge with different moisture contents, improving the economy and flexibility of the sludge conveying system, being extremely practical and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic diagram of the structure of the present invention

[0022] Among them, 1 is a low-moisture content wet sludge bin, 2 is a high-moisture content wet sludge bin, 3 is a low-moisture content wet sludge screw conveyor, 4 is a high-moisture content wet sludge screw conveyor, 5 is a mixing agitator, 6 is a plunger pump, 7 is a pressure measuring point, 8 is a membrane injection device, 9 is a water pump, 10 is a wastewater pool, and 11 is a sludge dryer. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0027] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0028] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0031] Embodiment 1

[0032] refer to Figure 1 The conveying system for wet sludge with different moisture contents of the present invention comprises a low moisture content wet sludge bin 1, a high moisture content wet sludge bin 2, a mixing agitator 5, a plunger pump 6, a sludge dryer 11 and a wastewater tank 10;

[0033] The outlet of the low-moisture content wet sludge bin 1 and the outlet of the high-moisture content wet sludge bin 2 are connected to the inlet of the mixing agitator 5; the outlet of the mixing agitator 5 is connected to the inlet of the plunger pump 6; the outlet of the plunger pump 6 is connected to the inlet of the sludge dryer 11, and a membrane injection device 8 is arranged on the connecting pipeline between the plunger pump 6 and the sludge dryer 11, and the inlet of the membrane injection device 8 is connected to the outlet of the wastewater tank 10.

[0034] The present invention discloses a method for conveying wet sludge with different moisture contents. The method for conveying wet sludge with different moisture contents is realized based on a conveying system for wet sludge with different moisture contents. The conveying system for wet sludge with different moisture contents comprises a low moisture content wet sludge bin 1, a high moisture content wet sludge bin 2, a mixing agitator 5, a plunger pump 6, a sludge dryer 11 and a wastewater tank 10. Specifically, the method for conveying wet sludge with different moisture contents comprises the following steps:

[0035] The sludge in the low-moisture content wet sludge bin 1 is transported to the mixing mixer 5, and the sludge in the high-moisture content wet sludge bin 2 is transported to the mixing mixer 5. The wet sludges with different moisture contents are squeezed and stirred in the mixing mixer 5 to form wet sludge with a moisture content of not less than 78%. The wet sludge with a moisture content of not less than 78% is transported to the sludge dryer 11 via the plunger pump 6.

[0036] It should be noted that the present invention can reasonably blend and evenly mix wet sludge with different moisture contents, so that wet sludge with different moisture contents can be stably transported via a single transport path, thereby improving practicality and economy.

[0037] Embodiment 2

[0038] refer to Figure 1 The conveying system for wet sludge with different moisture contents of the present invention comprises a low moisture content wet sludge bin 1, a high moisture content wet sludge bin 2, a low moisture content wet sludge screw conveyor 3, a high moisture content wet sludge screw conveyor 4, a mixing agitator 5, a plunger pump 6, a pressure measuring point 7, a film injection device 8, a water pump 9, a wastewater tank 10 and a sludge dryer 11;

[0039] The outlet of the low-moisture content wet sludge bin 1 is connected to the inlet of the low-moisture content wet sludge screw conveyor 3, and the outlet of the high-moisture content wet sludge bin 2 is connected to the inlet of the high-moisture content wet sludge screw conveyor 4; the outlet of the low-moisture content wet sludge screw conveyor 3 is connected to the low-moisture content inlet of the mixing agitator 5, and the outlet of the high-moisture content wet sludge screw conveyor 4 is connected to the high-moisture content inlet of the mixing agitator 5; the outlet of the mixing agitator 5 is connected to the inlet of the plunger pump 6; the outlet of the plunger pump 6 is connected to the inlet of the sludge dryer 11.

[0040] As an implementation mode of the present invention, a pressure measuring point 7 is arranged at the outlet pipe of the plunger pump 6 .

[0041] As an embodiment of the present invention, a film injection device 8 is arranged on the connecting pipeline between the plunger pump 6 and the sludge dryer 11 , and the film injection device 8 is located between the pressure measuring point 7 and the sludge dryer 11 .

[0042] As an embodiment of the present invention, the inlet of the film injection device 8 is connected to the outlet of the water pump 9 ; the inlet of the water pump 9 is connected to the outlet of the wastewater tank 10 .

[0043] As an embodiment of the present invention, it also includes a controller, which is connected to the low-moisture content wet sludge screw conveyor 3, the high-moisture content wet sludge screw conveyor 4, the mixing agitator 5, the plunger pump 6, the pressure measuring point 7, the water pump 9 and the sludge dryer 11.

[0044] The present invention discloses a method for conveying wet sludge with different moisture contents. The method for conveying wet sludge with different moisture contents is realized based on the conveying system for wet sludge with different moisture contents. The conveying system for wet sludge with different moisture contents comprises a low-moisture-content wet sludge bin 1, a high-moisture-content wet sludge bin 2, a low-moisture-content wet sludge screw conveyor 3, a high-moisture-content wet sludge screw conveyor 4, a mixing agitator 5, a plunger pump 6, a pressure measuring point 7, a film injection device 8, a water pump 9, a wastewater tank 10 and a sludge dryer 11. Specifically, the method for conveying wet sludge with different moisture contents comprises the following steps: the wet sludge bin 1 has a low-moisture-content wet sludge; the wet sludge bin 2 has a high-moisture-content wet sludge; the wet sludge screw conveyor 3 has a high-moisture-content wet sludge; the wet sludge screw conveyor 4 has a high-moisture-content wet sludge; the mixing agitator 5, a plunger pump 6, a pressure measuring point 7, a film injection device 8, a water pump 9, a wastewater tank 10 and a sludge dryer 11. Specifically, the method for conveying wet sludge with different moisture contents comprises the following steps: The sludge of low moisture content is transported to the mixer 5 via the low moisture content wet sludge screw conveyor 3, and the sludge in the high moisture content wet sludge bin 2 is transported to the mixer 5 via the high moisture content wet sludge screw conveyor 4. The wet sludges with different moisture contents are squeezed and stirred in the mixer 5 to form wet sludge with a moisture content of not less than 78%. The wet sludge with a moisture content of not less than 78% is transported to the sludge dryer 11 via the plunger pump 6. When the moisture content of the sludge at the outlet of the plunger pump 6 is lower than 78%, the pressure measuring point 7 sends a chain signal to the low moisture content wet sludge screw conveyor 3 and the high moisture content wet sludge screw conveyor 4 to automatically adjust the low / high moisture content wet sludge mixing ratio. At the same time, the pressure measuring point 7 sends a chain signal to the water pump 9, and the water pump 9 extracts wastewater from the wastewater pool 10 to supply the membrane injection device 8 to ensure that the sludge with a moisture content lower than 78% can be smoothly transported to the sludge dryer 11.

[0045] The present invention adopts a precise and effective automatic adjustment method to blend wet sludge with different moisture contents, so that a single sludge conveying system can smoothly transport sludge with a moisture content range of 70% to 85% at the same time. It not only improves the adaptability of the sludge conveying system to sludge with different moisture contents, but also avoids excessive loss of the service life of the sludge conveying system when transporting sludge with low moisture content, and provides certain technical support for the construction of a lightweight, economical and flexible sludge conveying system.

[0046] Embodiment 3

[0047] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for conveying wet sludge with different moisture contents are implemented. When the moisture content of the sludge at the outlet of the plunger pump 6 is lower than 78%, the pressure measuring point 7 sends a chain signal to the low-moisture-content wet sludge screw conveyor 3 and the high-moisture-content wet sludge screw conveyor 4 to automatically adjust the low / high-moisture-content wet sludge blending ratio. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus, which may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0048] Embodiment 4

[0049] A computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the method for conveying wet sludge with different moisture contents are implemented. When the moisture content of the sludge at the outlet of the plunger pump 6 is lower than 78%, the pressure measuring point 7 sends a chain signal to the low-moisture-content wet sludge screw conveyor 3 and the high-moisture-content wet sludge screw conveyor 4 to automatically adjust the low / high-moisture-content wet sludge blending ratio. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0050] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0051] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0052] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0054] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0055] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A conveying system suitable for wet sludge with different moisture contents, characterized in that: It comprises a low-water content wet sludge bin (1), a high-water content wet sludge bin (2), a mixing agitator (5), a plunger pump (6), a sludge dryer (11) and a wastewater pool (10); The outlet of the low-water content wet sludge bin (1) and the outlet of the high-water content wet sludge bin (2) are connected to the inlet of the mixing agitator (5); the outlet of the mixing agitator (5) is connected to the inlet of the plunger pump (6); the outlet of the plunger pump (6) is connected to the inlet of the sludge dryer (11), and a film injection device (8) is arranged on the connecting pipeline between the plunger pump (6) and the sludge dryer (11), and the inlet of the film injection device (8) is connected to the outlet of the wastewater tank (10).

2. The conveying system for wet sludge with different moisture contents according to claim 1 is characterized in that: The outlet of the low-water-content wet sludge bin (1) is communicated with the low-water-content inlet of the mixing stirrer (5) via the low-water-content wet sludge screw conveyor (3).

3. The conveying system for wet sludge with different moisture contents according to claim 1 is characterized in that: The outlet of the high-water-content wet sludge bin (2) is communicated with the high-water-content inlet of the mixing stirrer (5) via the high-water-content wet sludge screw conveyor (4).

4. The conveying system for wet sludge with different moisture contents according to claim 1 is characterized in that: A pressure measuring point (7) is arranged at the outlet pipe of the plunger pump (6).

5. The conveying system for wet sludge with different moisture contents according to claim 1 is characterized in that: The film injection device (8) is located between the pressure measuring point (7) and the sludge dryer (11).

6. The conveying system for wet sludge with different moisture contents according to claim 1 is characterized in that: The inlet of the film injection device (8) is connected to the outlet of the wastewater tank (10) via a water pump (9).

7. A method for conveying wet sludge with different moisture contents, characterized in that: The conveying system for wet sludge with different moisture contents according to claim 1 comprises the following steps: The sludge in the low-water-content wet sludge bin (1) is transported to the mixing and agitating device (5), and the sludge in the high-water-content wet sludge bin (2) is transported to the mixing and agitating device (5). The wet sludges with different water contents are squeezed and agitated in the mixing and agitating device (5) to form wet sludge with a water content of not less than 78%. The wet sludge with a water content of not less than 78% is transported to the sludge drying machine (11) via the plunger pump (6).

8. The method for conveying wet sludge with different moisture contents according to claim 7, characterized in that: A pressure measuring point (7) is arranged at the outlet pipe of the plunger pump (6).

9. The method for conveying wet sludge with different moisture contents according to claim 8, characterized in that: The film injection device (8) is located between the pressure measuring point (7) and the sludge dryer (11).

10. The method for conveying wet sludge with different moisture contents according to claim 9, characterized in that: When the moisture content of the sludge at the outlet of the plunger pump (6) is lower than 78%, the pressure measuring point (7) sends a chain signal to the low moisture content wet sludge screw conveyor (3) and the high moisture content wet sludge screw conveyor (4), automatically adjusting the low / high moisture content wet sludge mixing ratio. At the same time, the pressure measuring point (7) sends a chain signal to the water pump (9), and the water pump (9) draws wastewater from the wastewater pool (10) to supply the membrane injection device (8), ensuring that the sludge with a moisture content lower than 78% can be smoothly transported to the sludge dryer (11).

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