Leachate sludge conveying device and landfill leachate treatment system

Abstract

The utility model provides a leachate sludge conveying device and a landfill leachate treatment system, and relates to the technical field of environmental engineering. The leachate sludge is dewatered by the centrifugal dewatering machine, the dewatered leachate sludge is stored in the sludge storage hopper through the sludge inlet pipe, the leachate sludge in the sludge storage hopper reaches the sludge conveying pump through the sludge outlet pipe, the leachate sludge is extruded into the sludge conveying pipe by the sludge conveying pump, and the leachate sludge is conveyed into the sludge bin by the sludge conveying pipe; and the leachate sludge is destroyed in the sludge bin. Therefore, when the leachate sludge is treated, the leachate sludge does not need to be transferred through a sludge vehicle, a large amount of manpower and material resources are saved, the treatment process of the leachate sludge is simplified, and the treatment efficiency is improved; moreover, the whole conveying process of the leachate sludge from the centrifugal dehydrator to the sludge bin can be closed, and the centrifugal dehydrator does not need to be stopped, so that the leakage of the leachate sludge and the overflow of odor are avoided, and the waste of energy consumption is also avoided.

Description

Technical Field

[0001] The present application relates to the field of environmental engineering technology, and in particular to a leachate sludge conveying device and a landfill leachate treatment system. Background Art

[0002] Landfill leachate refers to a high-concentration organic or inorganic liquid produced by the physical, chemical and biological effects of compaction, fermentation, etc. during the stacking and landfilling of garbage, as well as the seepage of precipitation and groundwater. It has inferior characteristics such as complex water quality, high concentration of pollutants and high toxicity. If it is discharged directly without treatment, it will cause serious pollution to the soil, surface water and groundwater, and ultimately affect the ecological environment and human health. Therefore, it is necessary to treat landfill leachate.

[0003] In the related art, leachate sludge is generated when treating landfill leachate. The generated leachate sludge needs to be dehydrated by a centrifugal dehydrator, and the dehydrated leachate sludge will be transported by a sludge truck to an incineration site for incineration. This process has the following disadvantages: the transportation of leachate sludge and the maintenance of the sludge truck require a lot of manpower and material resources, which makes the leachate sludge treatment process cumbersome and inefficient; the sludge truck cannot achieve closed treatment when transporting leachate sludge, which makes the odor of the leachate sludge easily overflow, and may even leak, posing a risk of environmental pollution; the centrifugal dehydrator needs to be stopped each time the leachate sludge is transported, resulting in serious energy waste. Utility Model Content

[0004] The present application provides a leachate sludge conveying device and a landfill leachate treatment system, aiming to solve the problems in the related art of leachate sludge treatment, which is cumbersome, inefficient, and prone to environmental pollution and energy waste.

[0005] In order to solve the above-mentioned drawbacks existing in the related art, the first aspect of the present application provides a leachate sludge conveying device, including a mud inlet pipe, a mud outlet pipe, a mud pump, a mud transport pipe and a hollow mud storage hopper, one end of the mud inlet pipe is connected to the mud storage hopper, and the other end is used to connect to a centrifugal dehydrator, the centrifugal dehydrator is used to dehydrate the leachate sludge and then discharge it, the two ends of the mud outlet pipe are respectively connected to the mud storage hopper and the mud pump, one end of the mud transport pipe is connected to the mud pump, and the other end is used to connect to the sludge bin. Specifically, the mud storage hopper is used to introduce the leachate sludge discharged from the centrifugal dehydrator through the mud inlet pipe and store it, and discharge the leachate sludge into the mud outlet pipe; the mud pump is used to suck the leachate sludge in the mud outlet pipe and squeeze the leachate sludge into the mud transport pipe; the mud transport pipe is used to transport the leachate sludge to the sludge bin to destroy the leachate sludge in the sludge bin. Furthermore, the leachate sludge conveying device also includes a controller, which is communicatively connected to the sludge conveying pump. The controller is used to control the sludge conveying pump to suck the leachate sludge in the sludge outlet pipe and squeeze the leachate sludge into the sludge transport pipe.

[0006] In some implementation schemes, the leachate sludge conveying device also includes a screw conveyor, and the mud inlet pipe includes a first mud inlet pipe and a second mud inlet pipe. One end of the first mud inlet pipe is connected to the screw conveyor, and the other end is used to connect to the centrifugal dehydrator. The two ends of the second mud inlet pipe are respectively connected to the screw conveyor and the mud storage bucket. The screw conveyor is communicatively connected to the controller, and the controller is also used to: control the screw conveyor to introduce the leachate sludge discharged from the centrifugal dehydrator through the first mud inlet pipe, and convey the leachate sludge to the second mud inlet pipe so as to discharge the leachate sludge into the mud storage bucket through the second mud inlet pipe.

[0007] In some implementation schemes, the leachate sludge conveying device also includes a first position detector, a second position detector, a mud inlet valve and a mud outlet valve, which are respectively communicatively connected to the controller. The first position detector and the second position detector are both arranged on the inner wall of the mud storage hopper. The first position detector is located near the mud inlet pipe, and the second position detector is located near the mud outlet pipe. The mud inlet valve is arranged on the mud outlet pipe, and the mud outlet valve is arranged on the mud transport pipe. Specifically, the first position detector is used to detect whether the upper surface of the leachate sludge in the mud storage hopper reaches a first preset height, and sends a high position signal to the controller when it reaches it; the second position detector is used to detect whether the upper surface of the leachate sludge in the mud storage hopper reaches a second preset height, and sends a low position signal to the controller when it reaches it, and the second preset height is less than the first preset height; the mud inlet valve is used to connect or block the mud outlet pipe; the mud outlet valve is used to connect or block the mud transport pipe; the controller is also used to control the screw conveyor to stop transporting the leachate sludge to the second mud inlet pipe after receiving the high position signal, and control the mud inlet valve to connect the mud outlet pipe, and control the mud outlet valve to connect the mud transport pipe, and control the screw conveyor to transport the leachate sludge to the second mud inlet pipe after receiving the low position signal, and control the mud inlet valve to block the mud outlet pipe, and control the mud outlet valve to block the mud transport pipe.

[0008] In some implementations, the leachate sludge conveying device further includes a deodorizing fan and a deodorizing pipe. The deodorizing fan is communicatively connected to a controller. The sludge storage hopper has a deodorizing port communicating with the interior. One end of the deodorizing pipe is connected to the sludge storage hopper through the deodorizing port, and the other end is connected to an odor storage bin. The deodorizing fan is disposed within the deodorizing port. Specifically, the deodorizing fan is activated under the control of the controller to draw odors emitted by the leachate sludge in the sludge storage hopper into the deodorizing pipe. The deodorizing pipe is used to convey the odors to the odor storage bin for elimination there.

[0009] In some implementations, the leachate sludge conveying device further includes an oil storage tank, a film injection pump, a film injection ring, an oil inlet pipe, and an oil outlet pipe. The film injection ring is located in the sludge transport pipe and is disposed around the inner wall of the sludge transport pipe. One end of the oil inlet pipe is connected to the oil storage tank and the other end is connected to the film injection pump. One end of the oil outlet pipe is connected to the film injection pump and the other end is connected to the film injection ring. The film injection pump is communicatively connected to a controller. Specifically, the oil storage tank is used to store lubricating oil; the film injection pump is used to be activated under the control of the controller to extract lubricating oil from the oil storage tank through the oil inlet pipe and squeeze the extracted lubricating oil into the oil outlet pipe; the oil outlet pipe is used to transport the lubricating oil to the film injection ring; the film injection ring has at least one oil leakage hole, each of which is used to allow lubricating oil in the film injection ring to seep onto the inner wall of the sludge transport pipe.

[0010] In some implementations, the leachate sludge conveying device further includes a water tank, a water inlet pipe, a water outlet pipe, a check valve, and a water pump and a drain valve communicatively connected to a controller. The water inlet pipe is connected to the water tank at one end and to the water pump at the other end. The water outlet pipe is connected to the water pump at one end and to the sludge pump at the other end. The check valve is provided on the outlet pipe, and the drain valve is provided on the sludge pump. Specifically, the water tank is used to store clean water; the check valve is used to prevent leachate sludge in the sludge pump from entering the outlet pipe; the drain valve is used to connect or isolate the sludge pump from the external environment; the controller is further used to control the start-up of the water pump and the drain valve to connect the sludge pump to the external environment, so that the water pump draws clean water from the water tank through the water inlet pipe and transports the clean water to the sludge pump through the outlet pipe to clean the sludge pump. After the sludge pump is cleaned, the water pump is stopped and the drain valve is controlled to isolate the sludge pump from the external environment.

[0011] In some implementations, the sludge pump includes a screw conveying assembly and a screw pump. The screw conveying assembly is connected to the screw pump, which is then connected to a sludge storage hopper via a sludge discharge pipe. The screw pump is connected to a sludge bin via a sludge transport pipe. Specifically, the screw conveying assembly receives leachate sludge discharged from the sludge discharge pipe and transports the leachate sludge to the screw pump. The screw pump draws in the leachate sludge transported by the screw conveying assembly and squeezes the leachate sludge into the sludge transport pipe.

[0012] In some implementations, the circumference of the mud storage hopper gradually decreases along the direction from the mud inlet pipe to the mud outlet pipe.

[0013] The second aspect of the present application provides a landfill leachate treatment system, which includes a centrifugal dewatering machine and the leachate sludge conveying device mentioned in the first aspect of the present application. The centrifugal dewatering machine is used to dewater the leachate sludge and discharge the dehydrated leachate sludge into the mud inlet pipe of the leachate sludge conveying device.

[0014] The leachate sludge conveying device and the landfill leachate treatment system using the leachate sludge conveying device provided in the present application use a centrifugal dehydrator to dehydrate the leachate sludge. The dehydrated leachate sludge is stored in a sludge storage hopper through a sludge inlet pipe. The leachate sludge in the sludge storage hopper reaches a sludge pump through a sludge outlet pipe. The sludge pump sucks the leachate sludge in the sludge outlet pipe and squeezes the leachate sludge into the sludge transport pipe. The sludge transport pipe transports the leachate sludge to a sludge bin for destruction in the sludge bin. It can be seen that when treating leachate sludge, the present application does not need to transport it through sludge trucks like traditional solutions, which saves a lot of manpower and material resources, simplifies the treatment process of leachate sludge, and improves treatment efficiency; moreover, the entire transportation process of leachate sludge from the centrifugal dewatering machine to the sludge bin can be done in a closed manner, and there is no need to stop the centrifugal dewatering machine, which not only avoids the leakage of leachate sludge and the overflow of its odor, reduces the risk of environmental pollution, but also avoids energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the relevant technologies or the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the relevant technologies or the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the landfill leachate treatment system provided in an embodiment of the present application.

[0017] Figure 1 Several marks in the figure represent: 101-mud inlet pipe, 102-mud outlet pipe, 103-mud delivery pump, 104-mud transport pipe, 105-mud storage hopper, 106-centrifugal dehydrator, 107-sludge bin, 108-screw conveyor, 109-mud inlet valve, 110-mud outlet valve, 111-oil storage tank, 112-film injection pump, 113-film injection ring, 114-oil inlet pipe, 115-oil outlet pipe, 1011-first mud inlet pipe, 1012-second mud inlet pipe. DETAILED DESCRIPTION

[0018] In the related art, when treating landfill leachate, leachate sludge is generated. The generated leachate sludge needs to be dehydrated by a centrifugal dehydrator, and the dehydrated leachate sludge is transported by a sludge truck to an incineration site for incineration. This process has the following disadvantages: the transportation of leachate sludge and the maintenance of the sludge truck require a large amount of manpower and material resources, resulting in a cumbersome and inefficient leachate sludge treatment process; the sludge truck cannot be sealed when transporting leachate sludge, resulting in the odor of the leachate sludge easily overflowing, and even possible leakage, posing a risk of environmental pollution; each time leachate sludge is transported, the centrifugal dehydrator needs to be stopped, resulting in serious energy waste. In view of this, the present application proposes a leachate sludge conveying device and a landfill leachate treatment system using the leachate sludge conveying device in the following embodiments to solve the above-mentioned disadvantages in the related art.

[0019] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the various embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0020] See also Figure 1 , Figure 1Schematic diagram of the structure of a landfill leachate treatment system. This embodiment provides a landfill leachate treatment system, including a centrifugal dewatering machine 106 and a leachate sludge conveying device. The leachate sludge conveying device includes a mud inlet pipe 101, a mud outlet pipe 102, a mud pump 103, a mud transport pipe 104, and a hollow mud storage hopper 105. One end of the mud inlet pipe 101 is connected to the mud storage hopper 105, and the other end is connected to the centrifugal dewatering machine 106. The opposite ends of the mud outlet pipe 102 are respectively connected to the mud storage hopper 105 and the mud pump 103. One end of the mud transport pipe 104 is connected to the mud pump 103, and the other end is connected to the sludge bin 107. Specifically, the centrifugal dewatering machine 106 is used to dewater the leachate sludge and discharge the dehydrated leachate sludge into the mud inlet pipe 101; the mud inlet pipe 101 is used to introduce the leachate sludge discharged from the centrifugal dewatering machine 106 into the mud storage hopper 105; the mud storage hopper 105 is used to store the leachate sludge introduced through the mud inlet pipe 101; the mud outlet pipe 102 is used to transport the leachate sludge discharged from the mud storage hopper 105 to the mud pump 103; the mud pump 103 is used to suck the leachate sludge in the mud outlet pipe 102 and squeeze the leachate sludge into the mud transport pipe 104; the mud transport pipe 104 is used to transport the leachate sludge squeezed in by the mud pump 103 to the sludge bin 107, so as to destroy the leachate sludge in the sludge bin 107, and the destruction methods include incineration, pyrolysis, composting, sanitary landfill, etc. In addition, it should be noted that the moisture content of the leachate sludge after dehydration by the centrifugal dehydrator 106 is between 80% and 85%. It should also be noted that when the leachate sludge is dehydrated by the centrifugal dehydrator 106, in addition to the dehydrated leachate sludge, a sludge filtrate press is also obtained. Because the sludge filtrate press is highly harmful to the environment, the centrifugal dehydrator 106 also discharges the sludge filtrate press to a designated location for proper disposal at the designated location.

[0021] In this embodiment, the control of the mud pump 103, that is, the control of the mud pump 103 to suck the leachate sludge in the mud outlet pipe 102 and squeeze the leachate sludge into the mud transport pipe 104, can be either manual or automatic. In order to improve the intelligence and automation level of the leachate sludge conveying device (or the landfill leachate treatment system), the control of the mud pump 103 is preferably automatic control; of course, it is not limited to the mud pump 103 of this embodiment. For the screw conveyor 108, deodorizing fan (not shown), membrane injection pump 112, water pump (not shown), etc. described in other embodiments below, as well as valves such as the mud inlet valve 109, mud outlet valve 110, and drain valve (not shown), their control methods are also the same. Specifically, when automatic control is employed for the sludge pump 103, the leachate sludge conveying device, in addition to the aforementioned structure, further includes a controller (not shown). The controller is communicatively connected to the sludge pump 103 and is used to control the start / stop of the sludge pump 103. When started, the sludge pump 103 can draw leachate sludge from the sludge outlet pipe 102 and squeeze the leachate sludge into the sludge transport pipe 104. By way of example, the controller can be any controller commonly used in the art, such as a small computer, a microcontroller such as a single-chip microcomputer, an industrial control computer (IPC), a programmable logic controller (PLC), a distributed control system (DCS), etc., and this application does not impose any limitation thereto.

[0022] In this embodiment, the sludge pump 103 includes a screw conveying assembly (not shown) and a screw pump (not shown). The screw conveying assembly is connected to the screw pump, which is then connected to the sludge storage hopper 105 via the sludge discharge pipe 102. The screw pump is then connected to the sludge bin 107 via the sludge transport pipe 104. Specifically, the screw conveying assembly is used to receive leachate sludge discharged from the sludge discharge pipe 102 and transport it to the screw pump. The screw pump is used to inhale the leachate sludge transported by the screw conveying assembly and squeeze the leachate sludge into the sludge transport pipe 104. Exemplarily, the screw conveying assembly includes a casing (not shown), a screw shaft (not shown), a screw blade (not shown), a motor (not shown), a reducer (not shown) and an inlet and outlet (not shown). The screw blade is welded or mounted on the screw shaft. The casing plays a role in protecting internal components and accommodating leachate sludge. When conveying leachate sludge, the motor drives the screw shaft to rotate through the reducer. The leachate sludge conveyed through the mud outlet pipe 102 enters the casing from the feed port. As the screw shaft rotates, the spiral blade pushes the leachate sludge in the casing to move toward the outlet, and ensures a certain moving speed and amount, and eventually the leachate The sludge is pushed to the discharge port; the screw pump can be a single screw pump or a multi-screw pump (such as a twin-screw pump, a three-screw pump, a five-screw pump, etc.). Taking the single screw pump as an example, it includes a rotor (not shown in the figure, also called a screw) and a stator (not shown in the figure, also called a pump barrel). The rotor and the stator have special geometric shapes so that the rotor and the stator match and form multiple sealed cavities inside the pump. When the rotor rotates, these sealed cavities will continuously form at one end and continuously disappear at the other end. As the rotor rotates, each sealed cavity can continuously and pulsatingly suck in the leachate sludge from the discharge port of the spiral conveying component and squeeze the leachate sludge into the mud transport pipe 104 from the other end. Of course, in other embodiments, the spiral conveying component can also be omitted, that is, the mud pump 103 only includes a screw pump. Whether the mud pump 103 includes a spiral conveying component can be selected according to actual needs, and this application does not make a sole limitation on this. In addition, it should be noted that since the technologies of the spiral conveying assembly and the screw pump are relatively mature, the more specific structures of the spiral conveying assembly and the screw pump will not be elaborated in this application.

[0023] In this embodiment, the circumference of the mud storage hopper 105 gradually decreases along the direction of the mud inlet pipe 101 pointing to the mud outlet pipe 102, that is, the mud storage hopper 105 is "conical", and in the direction of the mud inlet pipe 101 pointing to the mud outlet pipe 102, the mud storage hopper 105 "becomes thinner". In this way, the mud storage hopper 105 will have an inclined inner wall that converges toward the pipe mouth of the mud outlet pipe 102, then the leachate sludge introduced into the mud storage hopper 105 through the mud inlet pipe 101 will slide along the inclined inner wall of the mud storage hopper 105 toward the pipe mouth of the mud outlet pipe 102, thereby smoothly entering the mud outlet pipe 102, and then smoothly passing through the mud outlet pipe 102 into the mud pump 103, which can effectively avoid the accumulation and bridging of leachate sludge.

[0024] In this embodiment, in order to ensure the airtightness of the entire transportation process of leachate sludge from the centrifugal dewatering machine 106 to the sludge bin 107, any two connected structures in the landfill leachate treatment system need to be sealed, such as the connection between the mud inlet pipe 101 and the centrifugal dewatering machine 106, the connection between the mud inlet pipe 101 and the mud storage bucket 105, the connection between the mud outlet pipe 102 and the mud storage bucket 105, the connection between the mud outlet pipe 102 and the mud pump 103, the connection between the mud transport pipe 104 and the mud pump 103, the connection between the mud transport pipe 104 and the sludge bin 107, etc. The sealing methods include sealant, asbestos seal, graphite seal, rubber seal, metal seal, mechanical seal, packing seal and labyrinth seal, etc. The specific sealing method can be selected according to actual needs, and this application does not make a sole limitation on this.

[0025] As can be seen from the above, this embodiment uses a centrifugal dehydrator 106 to dehydrate the leachate sludge. The dehydrated leachate sludge is stored in the sludge storage hopper 105 through the sludge inlet pipe 101. The leachate sludge in the sludge storage hopper 105 reaches the sludge pump 103 through the sludge outlet pipe 102. The sludge pump 103 sucks the leachate sludge in the sludge outlet pipe 102 and squeezes the leachate sludge into the sludge transport pipe 104. The sludge transport pipe 104 will transport the leachate sludge to the sludge bin 107 to destroy the leachate sludge in the sludge bin 107. It can be understood that when treating leachate sludge, this embodiment does not need to be transported by sludge trucks as in traditional solutions, which saves a lot of manpower and material resources, simplifies the treatment process of leachate sludge, and improves treatment efficiency; moreover, the entire transportation process of leachate sludge from the centrifugal dewatering machine 106 to the sludge bin 107 can be done in a closed manner, and there is no need to stop the centrifugal dewatering machine 106, which not only avoids the leakage of leachate sludge and the overflow of its odor, reduces the risk of environmental pollution, but also avoids energy waste.

[0026] In some embodiments, still refer to Figure 1In addition to the structure given above, the leachate sludge conveying device also includes a screw conveyor 108. The mud inlet pipe 101 includes a first mud inlet pipe 1011 and a second mud inlet pipe 1012. One end of the first mud inlet pipe 1011 is connected to the screw conveyor 108, and the other end is used to connect to the centrifugal dehydrator 106. The opposite ends of the second mud inlet pipe 1012 are respectively connected to the screw conveyor 108 and the mud storage hopper 105. The screw conveyor 108 is communicatively connected to the controller. The controller is also used to: control the screw conveyor 108 to introduce the leachate sludge discharged from the centrifugal dehydrator 106 through the first mud inlet pipe 1011, and transport the leachate sludge to the second mud inlet pipe 1012, so as to discharge the leachate sludge into the mud storage hopper 105 through the second mud inlet pipe 1012. It can be understood that the screw conveyor 108 serves to transport leachate sludge, and its structure and working principle are the same as those of the screw conveying assembly described above, so this application will not further explain the screw conveyor 108 here.

[0027] In some embodiments, still refer to Figure 1In addition to the structure given above, the leachate sludge conveying device also includes a first position detector (not shown in the figure), a second position detector (not shown in the figure), a mud inlet valve 109 and a mud outlet valve 110, which are respectively communicatively connected to the controller. The first position detector and the second position detector are both arranged on the inner wall of the mud storage hopper 105. The first position detector is located near the mud inlet pipe 101, and the second position detector is located near the mud outlet pipe 102. The mud inlet valve 109 is arranged on the mud outlet pipe 102, and the mud outlet valve 110 is arranged on the mud transport pipe 104. Specifically, the first position detector is used to detect whether the upper surface of the leachate sludge in the mud storage hopper 105 reaches a first preset height, and sends a high position signal to the controller when it reaches the first preset height; the second position detector is used to detect whether the upper surface of the leachate sludge in the mud storage hopper 105 reaches a second preset height, and sends a low position signal to the controller when it reaches the second preset height. Since the first position detector is located near the mud inlet pipe 101 and the second position detector is located near the mud outlet pipe 102, the second preset height is less than the first preset height; the mud inlet valve 109 is used to conduct or block The mud outlet pipe 102; the mud outlet valve 110 is used to open or close the mud transport pipe 104. The controller is further configured to: upon receiving a high-position signal, control the screw conveyor 108 to stop conveying leachate sludge to the second mud inlet pipe 1012, control the mud inlet valve 109 to open the mud outlet pipe 102, and control the mud outlet valve 110 to open the mud transport pipe 104; and upon receiving a low-position signal, control the screw conveyor 108 to convey leachate sludge to the second mud inlet pipe 1012, control the mud inlet valve 109 to close the mud outlet pipe 102, and control the mud outlet valve 110 to close the mud transport pipe 104. It should be noted that the first position detector and the second position detector can be of the same or different types, such as an ultrasonic level gauge, a radar level gauge, a laser level gauge, or a pressure sensor. Preferably, both the mud inlet valve 109 and the mud outlet valve 110 are flat gate valves.

[0028] It can be understood that in the process of the mud hopper 105 introducing the leachate sludge discharged from the centrifugal dehydrator 106 through the mud inlet pipe 101, as time goes by, the height of the leachate sludge in the mud hopper 105 will become higher and higher, that is, the leachate sludge in the mud hopper 105 will become more and more. When the upper surface of the leachate sludge in the mud hopper 105 reaches the first preset height, it will be sensed by the first position detector. Then the controller can control the screw conveyor 108 to stop conveying the leachate sludge to the second mud inlet pipe 1012, so that the leachate sludge in the mud hopper 105 no longer increases. At the same time, the mud inlet valve 109 is controlled to connect the mud outlet pipe 102, and the mud outlet valve 110 is controlled to connect the mud transport pipe 104, so that the leachate sludge in the mud hopper 105 can be discharged into the mud pump through the mud outlet pipe 102. 103, and discharged into the sludge bin 107 through the sludge pump 103 and the sludge transport pipe 104; in the process of transporting the leachate sludge in the sludge storage hopper 105 to the sludge bin 107, as time goes by, the height of the leachate sludge in the sludge storage hopper 105 will become lower and lower, that is, the leachate sludge in the sludge storage hopper 105 will become less and less. When the upper surface of the leachate sludge in the sludge storage hopper 105 reaches the second preset height, it will be sensed by the second position detector, and then the controller can control the screw conveyor 108 to discharge the leachate sludge discharged from the centrifugal dehydrator 106 into the sludge storage hopper 105 through the sludge inlet pipe 101, and control the sludge inlet valve 109 to cut off the sludge outlet pipe 102, and control the sludge outlet valve 110 to cut off the sludge transport pipe 104, so that the sludge storage hopper 105 can store the next round of leachate sludge; and so on.

[0029] In some embodiments, still refer to Figure 1In addition to the structure given above, the leachate sludge conveying device also includes a water tank (not shown in the figure), a water inlet pipe (not shown in the figure), a water outlet pipe (not shown in the figure), a check valve (not shown in the figure), and a water pump (not shown in the figure) and a drain valve (not shown in the figure) communicatively connected to the controller. One end of the water inlet pipe is connected to the water tank, and the other end is connected to the water pump. One end of the water outlet pipe is connected to the water pump, and the other end is connected to the sludge pump 103. The drain valve is arranged on the sludge pump 103, and the check valve is arranged on the water outlet pipe. Specifically, the water tank is used to store clean water; the check valve is used to prevent the leachate sludge in the sludge pump 103 from entering the outlet pipe; the drain valve is used to connect or isolate the sludge pump 103 from the external environment; the controller is also used to: when cleaning the sludge pump 103, control the drain valve to connect the sludge pump 103 with the external environment, and control the start of the water pump, so that the water pump draws clean water from the water tank through the water inlet pipe, and transports the drawn clean water to the sludge pump 103 through the outlet pipe. The clean water in the sludge pump 103 will be discharged to the external environment through the drain valve, thereby achieving the cleaning of the sludge pump 103, and after the sludge pump 103 is cleaned, control the water pump to stop, and control the drain valve to isolate the sludge pump 103 from the external environment. It can be understood that the present application realizes the cleaning of the mud pump 103 through structures such as a water storage tank, a water inlet pipe, a water outlet pipe, a check valve, a water pump, and a drain valve, which can effectively prevent the inlet and outlet of the mud pump 103 from becoming hardened due to long-term residual leachate sludge, and can ensure the smooth startup of the mud pump 103 and avoid damage to the mud pump 103.

[0030] It should be noted that, during the process of cleaning the mud pump 103, the controller can control the mud pump 103 to start or stop. When the mud pump 103 starts, the rotating shaft and screw inside it will rotate, which can further enhance the cleaning effect of the mud pump 103. It should also be noted that, during the process of cleaning the mud pump 103, whether to close the mud inlet valve 109 and the mud outlet valve 110 can be selected according to actual conditions, and this application does not make a sole limitation on this. Among them, whether to close the mud inlet valve 109 during the process of cleaning the mud pump 103 depends on whether there is leachate sludge in the mud storage hopper 105. When there is no leachate sludge in the mud storage hopper 105, the mud inlet valve 109 can be opened or closed. When there is leachate sludge in the mud storage hopper 105, in order to avoid leachate sludge in the mud storage hopper 105, the mud inlet valve 109 can be opened or closed. The liquid sludge is discharged into the mud pump 103 through the mud discharge pipe 102 to affect the cleaning effect of the mud pump 103. The controller can control the mud inlet valve 109 to be closed. Whether the mud discharge valve 110 is closed during the cleaning process of the mud pump 103 depends on whether the mud pump 103 is started when cleaning the mud pump 103. When the mud pump 103 is not started, the mud discharge valve 110 can be opened or closed. When the mud pump 103 is started, in order to prevent the clean water in the mud pump 103 from being squeezed into the mud transport pipe 104, the controller can control the mud discharge valve 110 to be closed.

[0031] In some embodiments, still refer to Figure 1 In addition to the structure given above, the leachate sludge conveying device also includes an oil storage tank 111, a film injection pump 112, a film injection ring 113, an oil inlet pipe 114 and an oil outlet pipe 115. The film injection ring 113 is located in the mud transport pipe 104 and is arranged around the inner wall of the mud transport pipe 104. One end of the oil inlet pipe 114 is connected to the oil storage tank 111, and the other end is connected to the film injection pump 112. One end of the oil outlet pipe 115 is connected to the film injection pump 112, and the other end is connected to the film injection ring 113. The film injection pump 112 is communicatively connected to the controller. Specifically, the oil storage tank 111 is used to store lubricating oil; the film injection pump 112 is used to start under the control of the controller to extract the lubricating oil in the oil storage tank 111 through the oil inlet pipe 114 and squeeze the lubricating oil into the oil outlet pipe 115; the oil outlet pipe 115 is used to transport the lubricating oil to the film injection ring 113; the film injection ring 113 has at least one oil leakage hole (not shown in the figure), and each oil leakage hole is used to supply the lubricating oil in the film injection ring 113 to seep onto the inner wall of the mud transport pipe 104, thereby realizing lubrication and maintenance of the mud transport pipe 104, avoiding manual maintenance, and making the mud pump 103 push the leachate sludge in the mud transport pipe 104 to the sludge bin 107 more smoothly, and can also better protect the mud pump 103.

[0032] In addition, it should be noted that the oil leakage hole is not limited to the form of a "hole". In other embodiments, the form of a "hole" can also be replaced with a "slit". The specific selection can be made based on actual needs, and this application does not limit this. It should also be noted that the number of film injection pumps 112 and film injection rings 113 is not limited to one. Both the film injection pumps 112 and the film injection rings 113 can be multiple. When there are multiple film injection rings 113, the multiple film injection rings 113 need to be distributed at different positions in the mud transport pipe 104, and the multiple film injection pumps 112 and the multiple film injection rings 113 can be "one-to-one" or "one-to-many". In other words, one film injection pump 112 can provide lubricating oil to one film injection ring 113, or one film injection pump 112 can provide lubricating oil to multiple film injection rings 113 at the same time. The specific selection can be made based on actual needs, and this application does not limit this.

[0033] In some embodiments, still refer to Figure 1 In addition to the structure described above, the leachate sludge conveying device also includes a deodorizing fan (not shown) and a deodorizing pipe (not shown). The deodorizing fan is communicatively connected to the controller. The sludge storage hopper 105 has a deodorizing port (not shown) connected to the interior. One end of the deodorizing pipe is connected to the sludge storage hopper 105 through the deodorizing port, and the other end is connected to the odor storage bin (not shown). The deodorizing fan is disposed within the deodorizing port. Specifically, the deodorizing fan is activated under the control of the controller to draw odor emitted by the leachate sludge in the sludge storage hopper 105 into the deodorizing pipe. The deodorizing pipe is used to convey the odor to the odor storage bin for elimination in the odor storage bin. The elimination methods include biological deodorization, chemical deodorization, activated carbon adsorption, plasma deodorization, photocatalytic deodorization, plant liquid spraying deodorization, and combustion. In addition, it should be noted that before the centrifugal dehydrator 106 dehydrates the leachate sludge, it also includes a process of treating the garbage leachate and generating leachate sludge accordingly. This process will also produce odor, so this odor can be combined with the odor emitted by the leachate sludge in the mud storage hopper 105, and then transported together to the odor bin for elimination.

[0034] In some embodiments, in addition to the structures listed above, the landfill leachate treatment system also includes other structures used in the field to treat landfill leachate. For example, in the process of treating landfill leachate and generating leachate sludge accordingly, it may involve grid filtration, water quality and / or water quantity adjustment, hardness removal, anaerobic treatment, aerobic treatment, deep treatment (such as advanced oxidation, activated carbon adsorption, etc.), membrane treatment (ultrafiltration, nanofiltration or reverse osmosis and other membrane separation technologies) and other steps. Then the landfill leachate treatment system must also include structures to implement these steps. Since these structures are relatively mature in landfill leachate treatment, this application will not elaborate on them here.

[0035] The above embodiments are only preferred implementations of the present application, and are not the only limitations on the relevant contents of the leachate sludge conveying device and the landfill leachate treatment system; in this regard, those skilled in the art can flexibly set them according to the actual application scenarios based on the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, the leachate sludge is dehydrated by using the centrifugal dehydrator 106, and the dehydrated leachate sludge is stored in the mud storage hopper 105 through the mud inlet pipe 101. The leachate sludge in the mud storage hopper 105 reaches the mud pump 103 through the mud outlet pipe 102. The mud pump 103 sucks the leachate sludge in the mud outlet pipe 102 and squeezes the leachate sludge into the mud transport pipe 104. The mud transport pipe 104 will transport the leachate sludge to the sludge bin 107 to destroy the leachate sludge in the sludge bin 107. It can be seen that when treating leachate sludge, the present application does not need to transport it through sludge trucks like traditional solutions, which saves a lot of manpower and material resources, simplifies the treatment process of leachate sludge, and improves treatment efficiency. Moreover, the entire transportation process of leachate sludge from the centrifugal dewatering machine 106 to the sludge bin 107 can be achieved in a closed manner, and there is no need to stop the centrifugal dewatering machine 106. This not only avoids the leakage of leachate sludge and the overflow of its odor, reduces the risk of environmental pollution, but also avoids energy waste.

[0036] It should be noted that the present application is described in a progressive manner in the several embodiments shown above, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. It should also be noted that in the text description of the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the terms "include", "comprise" or any other corresponding variants are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only these elements, but also other elements not explicitly listed, or elements inherent to such a process, method, article or device; and, in the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] Furthermore, by implementing the several embodiments described above, those skilled in the art can implement or use the present application. Various modifications to the several embodiments described above will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments not shown without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the several embodiments described above, but rather is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leachate sludge conveying device, characterized in that: It includes a mud inlet pipe, a mud outlet pipe, a mud pump, a mud transport pipe and a hollow mud storage hopper. One end of the mud inlet pipe is connected to the mud storage hopper, and the other end is used to connect to a centrifugal dehydrator. The centrifugal dehydrator is used to dehydrate the leachate sludge and then discharge it. The two ends of the mud outlet pipe are respectively connected to the mud storage hopper and the mud pump. One end of the mud transport pipe is connected to the mud pump, and the other end is used to connect to the sludge bin, wherein: The mud storage hopper is used to introduce the leachate sludge discharged from the centrifugal dehydrator through the mud inlet pipe and store it, and discharge the leachate sludge into the mud outlet pipe; The mud pump is used to suck the leachate sludge in the mud outlet pipe and squeeze the leachate sludge into the mud transport pipe; The sludge transport pipe is used to transport the leachate sludge to the sludge bin so as to destroy the leachate sludge in the sludge bin.

2. The leachate sludge conveying device according to claim 1, characterized in that: The system further comprises a controller, which is communicatively connected to the mud pump and is used to control the mud pump to suck the leachate sludge in the mud outlet pipe and squeeze the leachate sludge into the mud transport pipe.

3. The leachate sludge conveying device according to claim 2, characterized in that: The invention also includes a screw conveyor, wherein the mud inlet pipe includes a first mud inlet pipe and a second mud inlet pipe, one end of the first mud inlet pipe is connected to the screw conveyor, and the other end is used to connect to the centrifugal dehydrator, and the two ends of the second mud inlet pipe are respectively connected to the screw conveyor and the mud storage hopper, and the screw conveyor is communicatively connected to the controller, and the controller is further used to: The screw conveyor is controlled to introduce the leachate sludge discharged from the centrifugal dehydrator through the first mud inlet pipe, and convey the leachate sludge to the second mud inlet pipe, so as to discharge the leachate sludge into the mud storage hopper through the second mud inlet pipe.

4. The leachate sludge conveying device according to claim 3, characterized in that: The device further includes a first position detector, a second position detector, a mud inlet valve, and a mud outlet valve, each of which is communicatively connected to the controller. The first position detector and the second position detector are both arranged on the inner wall of the mud storage hopper. The first position detector is located near the mud inlet pipe, and the second position detector is located near the mud outlet pipe. The mud inlet valve is arranged on the mud outlet pipe, and the mud outlet valve is arranged on the mud transport pipe. The first position detector is used to detect whether the upper surface of the leachate sludge in the sludge storage hopper reaches a first preset height, and send a high position signal to the controller when the upper surface reaches a first preset height; The second position detector is used to detect whether the upper surface of the leachate sludge in the sludge storage hopper reaches a second preset height, and send a low position signal to the controller when the upper surface reaches a second preset height, and the second preset height is less than the first preset height; The mud inlet valve is used to open or close the mud outlet pipe; The mud outlet valve is used to open or close the mud transport pipe; The controller is also used to: after receiving the high-in-place signal, control the screw conveyor to stop conveying the leachate sludge to the second mud inlet pipe, and control the mud inlet valve to connect the mud outlet pipe, and control the mud outlet valve to connect the mud transport pipe; after receiving the low-in-place signal, control the screw conveyor to convey the leachate sludge to the second mud inlet pipe, and control the mud inlet valve to block the mud outlet pipe, and control the mud outlet valve to block the mud transport pipe.

5. The leachate sludge conveying device according to claim 2, characterized in that: It also includes a deodorizing fan and a deodorizing pipe, the deodorizing fan is communicatively connected to the controller, the mud storage hopper has a deodorizing port connected to the interior, one end of the deodorizing pipe is connected to the mud storage hopper through the deodorizing port, and the other end is used to connect to the odor bin, the deodorizing fan is arranged in the deodorizing port, wherein: The deodorizing blower is used to start under the control of the controller to draw the odor emitted by the leachate sludge in the sludge storage hopper into the deodorizing pipe; The deodorizing pipe is used to transport the odor to the odor bin so as to eliminate the odor in the odor bin.

6. The leachate sludge conveying device according to claim 2, characterized in that: It also includes an oil storage tank, a film injection pump, a film injection ring, an oil inlet pipe and an oil outlet pipe. The film injection ring is located in the mud transport pipe and is arranged around the inner wall of the mud transport pipe. One end of the oil inlet pipe is connected to the oil storage tank and the other end is connected to the film injection pump. One end of the oil outlet pipe is connected to the film injection pump and the other end is connected to the film injection ring. The film injection pump is communicatively connected to the controller, wherein: The oil storage tank is used to store lubricating oil; The film injection pump is used to start under the control of the controller to extract the lubricating oil in the oil storage tank through the oil inlet pipe and squeeze the lubricating oil into the oil outlet pipe; The oil outlet pipe is used to transport the lubricating oil to the film injection ring; The film injection ring has at least one oil leakage hole, and the oil leakage hole is used to allow the lubricating oil in the film injection ring to seep onto the inner wall of the mud transport pipe.

7. The leachate sludge conveying device according to claim 2, characterized in that: It also includes a water tank, a water inlet pipe, a water outlet pipe, a check valve, and a water pump and a drain valve communicatively connected to the controller. One end of the water inlet pipe is connected to the water tank and the other end is connected to the water pump. One end of the water outlet pipe is connected to the water pump and the other end is connected to the mud pump. The check valve is provided on the water outlet pipe, and the drain valve is provided on the mud pump. The water storage tank is used to store clean water; The check valve is used to prevent the leachate sludge in the sludge pump from entering the outlet pipe; The drain valve is used to connect or isolate the mud pump from the external environment; The controller is also used to: control the drain valve to connect the mud pump with the external environment, and control the start-up of the water pump, so that the water pump draws the clean water in the water tank through the water inlet pipe and transports the clean water to the mud pump through the water outlet pipe to clean the mud pump; after the cleaning of the mud pump is completed, control the water pump to stop, and control the drain valve to isolate the mud pump from the external environment.

8. The leachate sludge conveying device according to claim 1, characterized in that: The mud pump includes a screw conveying assembly and a screw pump. The screw conveying assembly is connected to the screw pump. The screw conveying assembly is connected to the mud storage hopper through the mud discharge pipe. The screw pump is used to be connected to the sludge bin through the mud transport pipe, wherein: The screw conveying assembly is used to receive the leachate sludge discharged from the mud outlet pipe and convey the leachate sludge to the screw pump; The screw pump is used to suck the leachate sludge transported by the screw transport assembly and squeeze the leachate sludge into the sludge transport pipe.

9. The leachate sludge conveying device according to claim 1, characterized in that: The circumference of the mud storage hopper gradually decreases along the direction from the mud inlet pipe to the mud outlet pipe.

10. A landfill leachate treatment system, characterized in that: It comprises a centrifugal dehydrator and the leachate sludge conveying device according to any one of claims 1 to 9, wherein the centrifugal dehydrator is used to dehydrate the leachate sludge and discharge the dehydrated leachate sludge into the mud inlet pipe of the leachate sludge conveying device.

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