Wet sludge storage and conveying system

Abstract

The utility model belongs to the technical field of sludge treatment, and relates to a wet sludge storage and conveying system. Comprising a wet sludge receiving bin, a screw conveyor, a plunger pump, a first impurity remover, a sludge storage tank, a first buffer hopper, a first screw pump, a high-level sludge storage tank, a second buffer hopper, a second screw pump and a fourth impurity remover which are sequentially connected through a sludge pipeline in the flowing direction of wet sludge, a first valve and a second valve are arranged at the front end and the rear end of the first impurity remover respectively, a first pressure relief pipeline communicated with the sludge storage tank is arranged at the position, between the first valve and the first impurity remover, of the sludge pipeline, and a third valve is arranged on the first pressure relief pipeline. The wet sludge storage and conveying system solves the technical problems that in an existing wet sludge storage and conveying system, the wet sludge storage capacity is not enough, wet sludge impurity removal is not sufficient, wet sludge conveying is not stable, and discharging of a sludge storage tank is not smooth.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, and relates to an anti-clogging, safe, large-capacity wet sludge storage and conveying system. Background Art

[0002] Wet sludge storage and conveying systems are widely used in the sludge treatment and disposal industry. Different wet sludge storage and conveying systems are used according to different application scenarios. For example, some projects use sludge receiving bin + pumping system, while some projects use sludge receiving tank + grab bucket.

[0003] According to the previous experience of using wet sludge storage and transportation systems, the existing wet sludge storage and transportation systems mainly have the following problems:

[0004] 1. Insufficient storage capacity for wet sludge;

[0005] The existing wet sludge storage and transportation system, a sludge treatment and disposal production line, generally only has one sludge receiving bin, and its storage capacity is generally 1.5 to 2 days of daily processing scale. If the project downtime is too long, or the equipment maintenance time is too long, the storage capacity of the sludge receiving bin is exceeded, and the subsequent sludge received will face the dilemma of insufficient storage space and cannot be stored;

[0006] 2. Insufficient impurity removal of wet sludge and unstable transportation;

[0007] Since the received wet sludge contains impurities such as large-grained stones, iron blocks, nylon bags, rubber blocks and other hard or entangled objects, the impurities in the wet sludge need to be filtered before the wet sludge is transported to the back-end equipment to meet the feeding requirements of the back-end equipment and avoid the back-end equipment being blocked or damaged by impurities. The factors that cause the existing wet sludge to be insufficiently removed and unstable in transportation are mainly the following three points: (1) The sludge impurity remover installed in the existing wet sludge storage and transportation system mainly adopts a filter-type impurity remover, which has an unsatisfactory use effect and cannot remove large-grained impurities in the sludge in time. (2) The existing wet sludge storage and transportation system generally only has one-stage filtration. Since the filter particle size of the first-stage filtration is fixed, it usually only filters a part of the impurities, and impurities with smaller particle sizes in the sludge will not be filtered out, resulting in insufficient filtration of sludge impurities. (3) The sludge impurity remover with a filter-type structure is inconvenient to operate during maintenance after clogging, which affects the cleaning speed and effect of the impurities in the impurity remover;

[0008] 3. There is a phenomenon of pressure holding and pressure relief in the sludge conveying pipeline, and the system equipment is unsafe;

[0009] If the wet sludge storage and transportation system pipelines are pressurized and the pressure is not released in time, it will cause safety accidents such as equipment damage. The solution in the existing project is to temporarily dismantle some sludge pipelines for pressure relief. This method is inconvenient to operate and has certain safety hazards. The occurrence of pressure buildup in the wet sludge storage and transportation system is mainly caused by the following two factors: (1) The gas generated by the fermentation of sludge in the pipeline cannot be discharged and the pressure is blocked. After the wet sludge storage and transportation system is shut down, the wet sludge will ferment and produce gas after being stored in the pipeline for a long time. Since the wet sludge pipeline and equipment are closed spaces, the gas generated by fermentation cannot be discharged and accumulates over a long period of time, which will cause the pressure in the system pipeline to be too high. (2) The sludge impurity remover is not cleaned in time, resulting in blockage and pressure buildup: If the sludge impurity remover is blocked and not cleaned in time, the sludge transportation resistance will become greater and greater, resulting in pipeline pressure buildup;

[0010] 4. The wet sludge transfer pump (screw pump) lacks measures to prevent dry running;

[0011] Due to the particularity of the screw pump structure, it is required that the screw pump feed hopper must be filled with sludge before operation to prevent dry operation and avoid damage to the screw pump stator / rotor due to dry operation. However, in the existing wet sludge storage and transportation system, there is no relevant equipment to detect whether the feed hopper is full of sludge, and there is a lack of measures to prevent the screw pump from dry operation;

[0012] 5. Odor from sludge storage equipment overflows, affecting the surrounding environment;

[0013] Wet sludge will generate a lot of odor in the storage equipment. If it is not collected and treated in time, it will escape to the surrounding environment, causing odor in the surrounding environment. However, the existing wet sludge storage and transportation system lacks odor collection devices, and it is impossible to collect and treat the odor in the sludge storage equipment in time, causing adverse effects on the surrounding environment.

[0014] 6. The discharge of sludge storage tank is not smooth;

[0015] In the existing wet sludge storage and conveying system, the sludge storage tank is only equipped with one discharge port, which is usually set at the low section of the side wall of the sludge storage tank. The wet sludge flows into the feed hopper of the sludge conveying pump from the discharge port of the sludge storage tank by its own gravity; when the storage height of the wet sludge in the sludge storage tank is lower than a certain value (about 6 meters), the wet sludge cannot smoothly enter the sludge conveying pump, resulting in the sludge discharge is not smooth, and then the existing sludge storage tank discharge is smooth, which is closely related to the material level in the sludge storage tank. Utility Model Content

[0016] In view of this, the purpose of the utility model is to provide a blockage-proof, safe, large-capacity wet sludge storage and conveying system to solve the technical problems of insufficient wet sludge storage capacity, insufficient wet sludge impurity removal, unstable wet sludge conveying, pressure buildup in the wet sludge conveying pipeline, prevention of dry running of screw pumps, prevention of odor overflow in wet sludge storage equipment, and unsmooth discharge of large sludge storage tanks in existing wet sludge storage and conveying systems.

[0017] In order to achieve the above object, the utility model provides the following technical solutions:

[0018] A wet sludge storage and transportation system comprises a wet sludge receiving bin, a screw conveyor, a plunger pump, a first impurity remover, a sludge storage tank, a first buffer bucket, a first screw pump, a high-position sludge storage tank, a second buffer bucket, a second screw pump and a fourth impurity remover which are sequentially connected through a sludge pipeline along the flow direction of the wet sludge, a first valve and a second valve are respectively provided at the front and rear ends of the first impurity remover, a first pressure relief pipeline connected to the sludge storage tank is provided at a position between the first valve and the first impurity remover on the sludge pipeline, and a third valve is provided on the first pressure relief pipeline.

[0019] Furthermore, an odor extraction port and an atmosphere connecting port are provided on the top of the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank. The atmosphere connecting port connects the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank with the atmosphere. The odor extraction port is connected to an odor induced draft fan through an odor pipeline to extract the odor in the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank into a deodorization system or an incineration system for treatment.

[0020] Furthermore, a fifteenth valve and a sixteenth valve are respectively provided at the front and rear ends of the fourth impurity remover, and a fourth pressure relief pipeline connected to the high-level sludge storage tank is provided on the sludge pipeline between the fifteenth valve and the fourth impurity remover, and a seventeenth valve is provided on the fourth pressure relief pipeline.

[0021] Furthermore, two parallel sludge branches are provided between the first screw pump and the high-level sludge storage tank, a second impurity remover and a third impurity remover are provided on the two parallel sludge branches respectively, a seventh valve and an eighth valve are provided at the front and rear ends of the second impurity remover respectively, and a ninth valve and a tenth valve are provided at the front and rear ends of the third impurity remover respectively.

[0022] Furthermore, a second pressure relief pipeline and a third pressure relief pipeline connected to the high-level sludge storage tank are respectively provided on the sludge branch line at a position between the seventh valve and the second impurity remover and at a position between the ninth valve and the third impurity remover, and a twelfth valve and an eleventh valve are respectively provided on the second pressure relief pipeline and the third pressure relief pipeline to control the opening and closing of the pressure relief pipelines accordingly.

[0023] Furthermore, a first discharge port and a second discharge port connected to the first cache bucket are respectively provided on the side and bottom of the sludge storage tank, a fifth valve is provided on the sludge pipeline connecting the first discharge port to the first cache bucket, and a foundation pit connected to the second discharge port is provided on the basis of the sludge storage tank, and the discharge port of the foundation pit is connected to the first cache bucket through the sludge pipeline, and a sixth valve is provided between the foundation pit and the first cache bucket.

[0024] Furthermore, the foundation pit is connected to an external flushing water source via a flushing water pipeline, and an eighteenth valve is provided on the flushing water pipeline.

[0025] Furthermore, material level switches are provided on the first buffer bucket and the second buffer bucket, and the two material level switches are respectively linked with the first screw pump and the second screw pump for controlling to avoid dry operation of the first screw pump and the second screw pump.

[0026] Furthermore, the first impurity remover, the second impurity remover, the third impurity remover and the fourth impurity remover are all configured as filter plate type impurity removers.

[0027] The beneficial effects of the utility model are:

[0028] The utility model provides a wet sludge storage and conveying system that increases the wet sludge storage capacity by adding a sludge storage tank and a sludge high-level tank, thereby providing ample equipment maintenance time and resumption time; adopts a multi-stage, multi-gradient filtration method to fully remove impurities of different particle sizes in the wet sludge, effectively preventing equipment blockage problems and ensuring the stability of the conveying equipment; adds a pressure relief pipeline to the sludge pipeline to effectively prevent pressure build-up in the equipment and pipeline, thereby improving the operability and safety of the system equipment; adopts a conveying process combination of a plunger pump + a screw pump to improve the wet sludge conveying Efficiency and stability, the large-displacement plunger pump can quickly transfer the wet sludge in the wet sludge receiving bin to the sludge storage tank, while the screw pump can stably and continuously transport the wet sludge in the large sludge storage tank and the sludge high-level tank to the back-end equipment; a buffer bucket is set above the screw pump, and a material level switch is set on the buffer bucket to effectively prevent the screw pump from running dry; an odor fan and odor pipeline are added to promptly extract the odor in the sludge storage equipment to prevent odor overflow; multiple discharge ports and flushing water pipelines are used to ensure smooth discharge of the sludge storage tank and avoid blockage at the bottom of the foundation pit.

[0029] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

[0031] Figure 1 It is a structural schematic diagram of a wet sludge storage and conveying system in the utility model.

[0032] Figure numerals: wet sludge receiving bin 1, screw conveyor 2, gate valve 3, plunger pump 4, first impurity remover 5, sludge storage tank 6, foundation pit 7, first buffer bucket 8, first screw pump 9, second impurity remover 10, third impurity remover 11, high-position sludge storage tank 12, second buffer bucket 13, second screw pump 14, fourth impurity remover 15, induced draft fan 16, material level switch 17. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0034] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] See also Figure 1, which is a wet sludge storage and transportation system, including a wet sludge receiving bin 1, a screw conveyor 2, a plunger pump 4, a first impurity remover 5, a sludge storage tank 6, a first buffer bucket 8, a first screw pump 9, a high-level sludge storage tank 12, a second buffer bucket 13, a second screw pump 14 and a fourth impurity remover 15, which are connected in sequence along the wet sludge flow direction through a sludge pipeline, and a gate valve 3 is provided between the screw conveyor 2 and the plunger pump 4.

[0037] Preferably, an odor suction port and an atmosphere connecting port are provided at the top of the wet sludge receiving bin 1, the sludge storage tank 6 and the high-position sludge storage tank 12. The atmosphere connecting port connects the wet sludge receiving bin 1, the sludge storage tank 6 and the high-position sludge storage tank 12 with the atmosphere to avoid the formation of negative pressure or positive pressure in the wet sludge receiving bin 1, the sludge storage tank 6 and the high-position sludge storage tank 12. The odor suction port is connected to the odor induced draft fan through an odor pipeline to suck the odor in the wet sludge receiving bin 1, the sludge storage tank 6 and the high-position sludge storage tank 12 into the deodorization system or the incineration system for treatment.

[0038] Preferably, two parallel sludge branches are provided between the first screw pump 9 and the high-level sludge storage tank 12, a second impurity remover 10 and a third impurity remover 11 are provided on the two parallel sludge branches, a seventh valve and an eighth valve are provided at the front and rear ends of the second impurity remover 10, and a ninth valve and a tenth valve are provided at the front and rear ends of the third impurity remover 11.

[0039] Furthermore, a second pressure relief pipeline and a third pressure relief pipeline connected to the high-level sludge storage tank 12 are respectively provided on the sludge branch line at a position between the seventh valve and the second impurity remover 10 and at a position between the ninth valve and the third impurity remover 11, and a twelfth valve and an eleventh valve are respectively provided on the above two pressure relief pipelines to control the opening and closing of the pressure relief pipelines.

[0040] Furthermore, a first valve and a second valve are respectively provided at the front and rear ends of the first impurity remover 5, and a first pressure relief pipeline connected to the sludge storage tank 6 is provided at a position between the first valve and the first impurity remover 5 on the sludge pipeline, and a third valve is provided on the first pressure relief pipeline.

[0041] Furthermore, a fifteenth valve and a sixteenth valve are respectively provided at the front and rear ends of the fourth impurity remover 15, and a fourth pressure relief pipeline connected to the high-level sludge storage tank 12 is provided at a position between the fifteenth valve and the fourth impurity remover 15 on the sludge pipeline, and a seventeenth valve is provided on the fourth pressure relief pipeline.

[0042] Preferably, a first discharge port and a second discharge port connected to the first cache bucket 8 are respectively provided on the side and bottom of the sludge storage tank 6, a fifth valve is provided on the sludge pipeline connecting the first discharge port to the first cache bucket 8, and a foundation pit 7 connected to the second discharge port is provided on the basis of supporting the sludge storage tank 6, and the discharge port of the foundation pit 7 is connected to the first cache bucket 8 through the sludge pipeline, and a sixth valve is provided between the foundation pit 7 and the first cache bucket 8.

[0043] Furthermore, the foundation pit 7 is connected to an external flushing water source via a flushing water pipeline, and an eighteenth valve is provided on the flushing water pipeline.

[0044] Preferably, a material level switch 17 is provided on both the first buffer bucket 8 and the second buffer bucket 13, and the two material level switches 17 are respectively linked with the first screw pump 9 and the second screw pump 14 to avoid dry operation of the first screw pump 9 and the second screw pump 14.

[0045] Specifically, a fourth valve is provided on the sludge pipeline near the feed inlet of the sludge storage tank 6 , a thirteenth valve is provided near the feed inlet of the high-position sludge storage tank 12 , and a fourteenth valve is provided near the bottom discharge port of the high-position sludge storage tank 12 .

[0046] The working process of the above wet sludge storage and transportation system is as follows:

[0047] The wet sludge is poured into the wet sludge receiving bin 1 by a transport vehicle, and then transported to the plunger pump 4 by the screw conveyor 2 at the bottom of the wet sludge receiving bin, and then transported to the large sludge storage tank 6 by the plunger pump 4 for storage, and a first impurity remover 5 is provided between the plunger pump 4 and the sludge storage tank 6 to perform primary filtration and impurity removal on the wet sludge;

[0048] A discharge port is respectively arranged at the side and the bottom of the sludge storage tank 6, and the discharge ports are both connected to the first buffer bucket 8. A material level switch is arranged on the first buffer bucket 8. When the material level in the first buffer bucket 8 reaches the set requirement, the first screw pump 9 arranged at the outlet of the first buffer bucket 8 is turned on to transport the wet sludge in the first buffer bucket 8 to the high-position sludge storage tank 12; preferably, a second impurity remover 10 and a third impurity remover 11 are respectively arranged on the first sludge branch and the second sludge branch in parallel between the first screw pump 9 and the high-position sludge storage tank 12, so as to form a redundant setting of one for use and one for backup, so that the wet sludge is subjected to secondary filtration and impurity removal by the second impurity remover 10 and the third impurity remover 11 during the process of being transported to the high-position sludge storage tank 12 by the first screw pump 9;

[0049] A discharge port is arranged at the bottom of the high-position sludge storage tank 12, which is connected to the second buffer bucket 13 to provide wet sludge to the second screw pump 14. A fourth impurity remover 15 is arranged at the outlet of the second screw pump 14. After the wet sludge is filtered and impurities are removed by the three-stage impurity remover 4, it is transported by the second screw pump 14 to the rear-end sludge drying and incineration equipment.

[0050] The wet sludge storage and transportation system is provided with pressure relief pipelines on the inlet pipelines of the first impurity remover 5, the second impurity remover 10, the third impurity remover 11 and the fourth impurity remover 15, respectively, and the pressure relief pipelines are respectively connected with the wet sludge receiving bin 1, the sludge storage tank 6 and the high-level sludge storage tank 12, so that when one or more of the above four impurity removers are pressurized, the valve on the pressure relief pipeline can be opened to relieve the pressure, thereby ensuring the safety of the system equipment.

[0051] At the same time, a foundation pit 7 is also set in the bottom foundation of the sludge storage tank 6. The foundation pit 7 is connected with the flushing waterway and sludge pipeline pre-buried in the foundation. When the foundation pit 7 or the sludge pipeline is blocked, it can be flushed with high-pressure water.

[0052] In addition, odor outlets and atmospheric communication ports are arranged at the top of the wet sludge receiving bin 1, the sludge storage tank 6 and the high-position sludge storage tank 12. The odor outlets are connected to the odor exhaust fan through an odor pipeline to timely extract the odor generated by the wet sludge and send it to the deodorization system or the incineration system for treatment.

[0053] In view of the shortcomings of the existing wet sludge storage and transportation system, this embodiment mainly adopts the following measures to solve them:

[0054] 1. Add sludge storage tank 6 and high-position sludge storage tank 12 to solve the storage capacity problem.

[0055] In this embodiment, on the basis of the wet sludge receiving bin 1, one or more sets of sludge storage tanks and high-level sludge storage tanks 12 are added. The storage capacity of a single set of the large-scale sludge storage tank 6 is more than 7 days of daily processing scale; the storage capacity of a single set of the high-level sludge storage tank 12 is relatively small, but the main function of the high-level sludge storage tank 12 is to provide stable wet sludge for the rear-end conveying equipment.

[0056] Therefore, when the project is shut down or the equipment is under maintenance, there is sufficient storage space to receive and store wet sludge for a long time, which also provides sufficient buffer time for project resumption or equipment maintenance.

[0057] 2. Use filter plate impurity remover and multi-stage / multi-gradient filtration to fully remove impurities of different particle sizes in wet sludge and ensure the stability of wet sludge transportation.

[0058] In this embodiment, the impurity remover adopts a detachable filter plate type impurity remover (the specific structure can refer to the Chinese patent application number 2022223117772, which discloses a pipeline filter for filtering sludge). When the impurity remover is blocked, the filter plate is easy to disassemble and clean; at the same time, the aperture on the filter plate can be designed and adjusted according to the particle size of impurities in the wet sludge, such as the filter plate aperture of 10mm, 20mm and 30mm, which has a wide range of applications; in the wet sludge storage and conveying system, multiple impurity removers with different filter plate apertures are arranged at the inlets and outlets of different conveying equipment to achieve multi-stage and multi-gradient filtration, fully remove impurities in the wet sludge, and ensure stable operation of the back-end equipment.

[0059] 3. Add a pressure relief pipeline and a pressure relief valve installed on the pressure relief pipeline on the main inlet of the sludge remover to release the gas generated by wet sludge or fermentation to the nearest sludge storage equipment to avoid excessive pressure in the pipeline and equipment;

[0060] Specifically, a pressure relief valve and a pressure relief pipeline are added to the pipelines between the sludge pump (outlet) and the impurity remover (inlet) at the rear ends of the wet sludge receiving bin 1, the large sludge storage tank and the high-position sludge storage tank 12, respectively, to connect the high-position sections of the large sludge storage tank and the high-position sludge storage tank 12. When the pressure in the pipeline is too high, the pressure relief valve is opened, and the pressure relief pipeline is connected to the wet sludge receiving bin, the sludge storage tank 6 and the high-position sludge storage tank 12, respectively, to release the wet sludge or the gas generated by fermentation in the sludge pipeline to the corresponding sludge storage equipment, to prevent the pressure in the wet sludge pipeline from being too high.

[0061] 4. Add a buffer hopper above the screw pump feed hopper and set a material level switch on the buffer hopper to monitor the material level in the buffer hopper to prevent the screw pump from running dry due to the lack of wet sludge in the screw pump feed hopper;

[0062] A material level switch is installed at a certain height of the buffer hopper (the installation position is determined according to the actual situation). When the material level in the buffer hopper is lower than this height, the material level switch will transmit the material level signal to the control system and shut down the screw pump in time to prevent the screw pump from running dry without wet sludge and avoid damaging the stator / rotor of the screw pump;

[0063] 5. Add odor induced draft fans and odor pipelines to extract the odor in the wet sludge storage equipment to the deodorization system or incineration system for treatment;

[0064] Specifically, odor suction ports and atmosphere connection ports are respectively arranged on the top of the wet sludge receiving bin, the large sludge storage tank and the high-position sludge storage tank 12, and the odor in the wet sludge storage equipment is sucked into the deodorization system or the incineration system for treatment by using an odor induced draft fan and an odor pipeline to prevent the odor from overflowing and affecting the surrounding environment.

[0065] 6. Add a sludge discharge port at the bottom of the sludge storage tank.

[0066] A foundation pit of a certain diameter is added at the bottom of the sludge storage tank foundation, and then a sludge pipeline connected to the foundation pit is pre-buried in the foundation, and the sludge pipeline is also connected to the first buffer bucket 8; at the same time, the sludge discharge port on the side wall of the original sludge storage tank is also connected to the sludge transfer pump buffer bucket, thereby forming two discharge ports on the sludge storage tank 6. When the wet sludge level in the sludge storage tank is high, the side wall discharge port or the bottom discharge port can be used for discharge; when the wet sludge level in the sludge storage tank is low, the bottom discharge port is used for discharge.

[0067] Therefore, after this design, no matter the sludge storage tank is at a high level or a low level, the wet sludge can be discharged smoothly from the sludge storage tank.

[0068] In addition, a flushing water pipeline is added to the foundation of the sludge storage tank, which is also connected to the foundation pit. When the foundation pit or the discharge pipeline in the foundation pit is blocked, the flushing water pipeline can be connected to high-pressure water to flush the foundation pit or the discharge pipeline in the foundation pit, which can effectively solve the blockage problem at the bottom of the foundation pit.

[0069] After the wet sludge storage and transportation system was used and verified in a sludge project in Luzhou, there was no equipment blockage or unsmooth transportation in the wet sludge storage and transportation system, and the use effect was good. The wet sludge storage and transportation system in this application includes but is not limited to the above-mentioned equipment and components, and can also be combined into one or more sets of wet sludge storage and transportation systems by the above-mentioned equipment.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A wet sludge storage and transportation system, characterized in that: The invention comprises a wet sludge receiving bin, a screw conveyor, a plunger pump, a first impurity remover, a sludge storage tank, a first buffer bucket, a first screw pump, a high-position sludge storage tank, a second buffer bucket, a second screw pump and a fourth impurity remover which are sequentially connected through a sludge pipeline along the flow direction of the wet sludge, a first valve and a second valve are respectively provided at the front and rear ends of the first impurity remover, a first pressure relief pipeline connected to the sludge storage tank is provided at a position between the first valve and the first impurity remover on the sludge pipeline, and a third valve is provided on the first pressure relief pipeline.

2. The wet sludge storage and transportation system according to claim 1, characterized in that: An odor suction port and an atmosphere connecting port are provided on the top of the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank. The atmosphere connecting port connects the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank with the atmosphere. The odor suction port is connected to an odor induced draft fan through an odor pipeline to suck the odor in the wet sludge receiving bin, the sludge storage tank and the high-position sludge storage tank into a deodorization system or an incineration system for treatment.

3. The wet sludge storage and transportation system according to claim 1, characterized in that: A fifteenth valve and a sixteenth valve are respectively provided at the front and rear ends of the fourth impurity remover, and a fourth pressure relief pipeline connected to a high-level sludge storage tank is provided between the fifteenth valve and the fourth impurity remover on the sludge pipeline, and a seventeenth valve is provided on the fourth pressure relief pipeline.

4. The wet sludge storage and transportation system according to claim 1, characterized in that: Two parallel sludge branches are arranged between the first screw pump and the high-level sludge storage tank, a second impurity remover and a third impurity remover are respectively arranged on the two parallel sludge branches, a seventh valve and an eighth valve are respectively arranged at the front and rear ends of the second impurity remover, and a ninth valve and a tenth valve are respectively arranged at the front and rear ends of the third impurity remover.

5. The wet sludge storage and transportation system according to claim 4, characterized in that: A second pressure relief pipeline and a third pressure relief pipeline connected to the high-level sludge storage tank are respectively provided on the sludge branch line at a position between the seventh valve and the second impurity remover and at a position between the ninth valve and the third impurity remover, and a twelfth valve and an eleventh valve are respectively provided on the second pressure relief pipeline and the third pressure relief pipeline to control the opening and closing of the pressure relief pipelines accordingly.

6. The wet sludge storage and transportation system according to claim 1, characterized in that: A first discharge port and a second discharge port connected to the first buffer bucket are respectively provided on the side and bottom of the sludge storage tank, a fifth valve is provided on the sludge pipeline connected to the first buffer bucket from the first discharge port, and a foundation pit connected to the second discharge port is provided on the basis of the sludge storage tank, and the discharge port of the foundation pit is connected to the first buffer bucket through the sludge pipeline, and a sixth valve is provided between the foundation pit and the first buffer bucket.

7. The wet sludge storage and transportation system according to claim 6, characterized in that: The foundation pit is also connected to an external flushing water source through a flushing water pipeline, and an eighteenth valve is provided on the flushing water pipeline.

8. The wet sludge storage and transportation system according to claim 1, characterized in that: Material level switches are provided on the first buffer bucket and the second buffer bucket, and the two material level switches are respectively linked with the first screw pump and the second screw pump for control to avoid dry operation of the first screw pump and the second screw pump.

9. The wet sludge storage and transportation system according to claim 1, characterized in that: The first impurity remover, the second impurity remover, the third impurity remover and the fourth impurity remover are all configured as filter plate type impurity removers.

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