A leachate back spraying device, a discharge port of a garbage pool and a garbage pool

Abstract

This application relates to a leachate return spraying device, a discharge port of a waste pit, and a waste pit. The leachate return spraying device is used to return heated leachate to the discharge port of the waste pit. It includes: a sleeve disposed on the side wall of the discharge port, and a main pipe sleeved within the sleeve; a water outlet is provided at the middle of one side of the main pipe, the water outlet being an elongated hole that laterally covers the entire discharge port; a flooding plate is installed at the bottom of the water outlet at a downward slope; a water trap is provided at the bottom of the main pipe; after the heated leachate fills the water trap, it flows outward along the water outlet and then outward along the flooding plate, forming a water curtain that sprays onto the waste rolling down the slope of the discharge port. This allows the heated leachate to be sprayed onto all the domestic waste rolling down the slope of the discharge port, providing comprehensive heating to the fresh domestic waste.

Description

Technical Field

[0001] This application relates to the technical field of municipal solid waste incineration power generation, and in particular to a leachate return spraying device, a discharge port of a waste pit, and a waste pit. Background Technology

[0002] In cold and extremely cold regions, when fresh municipal solid waste is introduced into the incineration power generation facility in winter, its temperature is essentially the same as the outdoor temperature, below zero degrees Celsius, and in some areas even tens of degrees below zero. The moisture in the waste is frozen. The waste undergoes 5-7 days of anaerobic fermentation in the incineration facility, releasing moisture and increasing its calorific value before entering the furnace. However, in low-temperature environments, the frozen moisture in the waste is difficult to release, and the anaerobic fermentation process is inhibited, resulting in a lower calorific value of the waste entering the furnace. This necessitates the addition of auxiliary fuels such as natural gas or diesel to promote combustion and maintain furnace temperature, ensuring the incinerator operates normally. This reduces production thermal efficiency and increases operating costs.

[0003] To ensure the normal operation of the incinerator and increase the temperature and calorific value of the waste entering the furnace, insulation and heating measures need to be taken for the domestic waste in the waste pit during winter. The main measure for heating the domestic waste is to use the leachate precipitated from the domestic waste as a medium, and to use the exhaust steam from the turbine as a heat source to heat the leachate before spraying it onto the fresh waste that has just entered the waste pit, mixing and heating it to dissolve the ice and promote the anaerobic fermentation and maturation reaction.

[0004] In existing technologies, a pipe is typically pre-installed at the center line of the waste disposal gate, directly opposite the slope of the disposal opening. Spray nozzles are installed on the pipe, and during the unloading process, heated leachate is directly sprayed onto the fresh municipal solid waste for mixing and heating. Because this method of directly spraying heated leachate results in a concentrated spray area, a large distribution of municipal solid waste during unloading, uneven mixing, and poor heating effect. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a leachate re-spraying device, a discharge port for a waste pit, and the waste pit itself. During the unloading process of municipal solid waste, a mixed and heated leachate is evenly sprayed onto the waste rolling down the slope from the discharge port. This heating process melts and freezes the fresh waste, promoting anaerobic fermentation and maturation. Both the freezing and thawing process in the fresh waste and the anaerobic fermentation and maturation reaction increase the amount of leachate released from the waste, thereby increasing the calorific value of the waste and ultimately improving production thermal efficiency and reducing operating costs.

[0006] Specifically, this application provides a leachate back spraying device for back spraying heated leachate to the discharge port of a landfill, the discharge port including a sidewall and a slope; the leachate back spraying device includes:

[0007] A sleeve is provided on the side wall of the discharge port, and

[0008] The main pipe is fitted inside the sleeve; a water outlet is provided at the middle of one side of the main pipe, the water outlet is an elongated hole that covers the entire discharge port laterally; a water-retaining plate is installed at the bottom of the water outlet at a downward slope; a water trap is left at the bottom of the main pipe; after the heated leachate fills the water trap, it flows outward along the water outlet and outward along the water-retaining plate to form a water curtain that sprays onto the garbage rolling down the slope from the discharge port.

[0009] Furthermore, baffles are installed on both sides of the outlet to prevent leachate from spreading along the main pipe to the side wall of the discharge port.

[0010] Furthermore, the connection between the main pipe and the sleeve is sealed with fire-resistant sealing material to prevent odor from escaping.

[0011] Furthermore, it also includes:

[0012] The water inlet assembly includes an inlet pipe and a transition water tank; the inlet pipe is installed on the side of the transition water tank; one end of the inlet pipe is connected to the bottom of the transition water tank.

[0013] Furthermore, a plug is provided at the other end of the main pipe.

[0014] Furthermore, the transition water tank has a sealing cover; the plug is connected to the main pipe by threads and is provided with a sealing ring.

[0015] Furthermore, the water inlet assembly also includes an overflow pipe and a flow meter; the overflow pipe connects the transition water tank and the discharge port; the flow meter is installed on the overflow pipe.

[0016] Furthermore, the flashing plate has rounded chamfers at its edges.

[0017] In addition, this application also provides a discharge port for a landfill, including the leachate return spraying device as described above; the leachate flowing out of the leachate return spraying device forms a water curtain and sprays onto the landfill rolling down the slope from the discharge port.

[0018] In addition, this application also provides a waste pool, characterized by including a discharge port of the waste pool as described above.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] During the construction of the unloading port sidewall structure, a sleeve can be pre-embedded. After the structure is completed, the entire sleeve is inserted into the main pipe for installation, which avoids damage during construction and allows for complete replacement if problems occur during later use, reducing the difficulty of installation and maintenance.

[0021] The outlet faces the unloading port, covering the entire unloading port slope along the length of the waste. The opening faces the side where domestic waste is unloaded, which increases the contact area between leachate and fresh waste, improves the uniformity of waste heating, accelerates the melting speed of fresh waste, promotes anaerobic fermentation, releases leachate, increases the calorific value of waste combustion, improves power generation efficiency, reduces the input of auxiliary fuel, and lowers operating costs.

[0022] One end of the main pipe is equipped with a detachable plug, which can be cleaned when there is sediment, scale or other blockage in the water trap at the bottom of the main pipe that affects the distribution of leachate. It can also be rinsed with clean water after the leachate return spray device is turned off to prevent it from affecting the subsequent use effect.

[0023] This application includes a water inlet section and a spraying section. The water inlet section includes an inlet pipe, a transition water tank, an overflow pipe, and a flow meter. The spraying section includes a main pipe, a sleeve, a plug, a water outlet, a baffle plate, and a flooding plate. The inlet pipe delivers heated leachate into the transition water tank. When the spraying section becomes blocked, the overflow pipe discharges excess leachate from the transition water tank to the garbage pit to prevent contamination of the unloading platform. Simultaneously, the flow meter on the overflow pipe transmits flow data to the operation control room to notify the on-duty personnel. After being heated, the leachate flows smoothly into the main pipe of the spraying section after the transition water tank offsets the water flow impact. The opening of the main pipe of the spraying section covers the entire unloading port slope, allowing the heated leachate to be sprayed onto all the domestic waste rolling down the unloading port slope. This comprehensively heats the fresh domestic waste, dissolves ice, promotes anaerobic fermentation, and releases more leachate, increasing the calorific value of the domestic waste and ultimately improving production efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0026] Figure 1 A schematic diagram of the leachate return spray device installed at the discharge port of the garbage pit according to this utility model;

[0027] Figure 2 This is a schematic diagram of the leachate re-spraying device of this utility model;

[0028] Figure 3 This is a schematic diagram of the water spraying part of the leachate return spraying device of this utility model;

[0029] Figure 4 This is a schematic diagram of the water outlet of the main pipe of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Side wall of discharge port; 2. Slope of discharge port; 3. Baffle of discharge port; 4. Main pipe; 5. Sleeve; 6. Plug; 7. Inlet pipe; 8. Transition water tank; 9. Overflow pipe; 10. Flow meter; 11. Outlet; 12. Flood vane; 13. Baffle plate. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0033] In the description of this application, it should be understood that the orientations or positional relationships indicated by terms, etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device, element, module, system, platform, or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The following description of this application is only to be understood as a description of individual embodiments of the technical solutions of this application. Other embodiments are not reflected in the following description, but this does not mean that this application excludes these other embodiments, nor is the technical solution of this application limited to the specific implementations described below, and the protection scope of this application is not limited to the specific implementations described below. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this application.

[0034] It should be noted that if the terms "first," "second," etc., appear in the specification, claims, and accompanying drawings of this application, such descriptions are only used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a system, product, or device that comprises a series of units, modules, or components is not necessarily limited to those explicitly listed, but may include other components not explicitly listed or inherent to such systems, products, or devices.

[0035] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] In some embodiments, such as Figure 1-4 As shown, this application provides a leachate heating and respraying device, specifically including a water inlet section and a water spraying section. The entire device is made of stainless steel and can effectively adapt to high temperature and corrosive working environment of leachate for a long time.

[0037] The water inlet section includes an inlet pipe 7, a transition water tank 8, an overflow pipe 9, and a flow meter 10. The inlet pipe 7 and the overflow pipe 9 are installed on the side of the transition water tank 8. The transition water tank 8 adopts a sealed structure with a cover to prevent the leachate odor from escaping. The heated leachate flows into the transition water tank 8 through the inlet pipe 7, and after the transition water tank 8 offsets the water flow impact, it flows smoothly into the water spraying section.

[0038] The sprinkler system includes a main pipe 4 and a sleeve 5. The main pipe 4 includes a plug 6, a water outlet 11, a flashing plate 12, and a baffle plate 13. During the construction of the garbage pit structure, the sleeve 5 is pre-embedded in the side wall 1 of the unloading port. Before pre-embedding, the two ends of the sleeve 5 are sealed to ensure it is firmly fixed to the structural steel bars and formwork and kept horizontal to prevent blockage and displacement during concrete pouring. After the structural construction is completed, the main pipe 4 is installed by inserting it entirely into the sleeve 5. After the horizontality of the main pipe 4 is adjusted, the gap between it and the sleeve 5 is sealed with fireproof sealing material to prevent the odor from escaping from the garbage pit.

[0039] The overflow pipe 9 has the same diameter as the inlet pipe 7. When the water spraying part is blocked, all the leachate can be discharged into the garbage pit through the overflow pipe 9 to prevent leakage and contamination of the unloading platform. When leachate flows through the overflow pipe 9, the flow meter 10 installed on it transmits the flow data to the operation control room. The on-duty personnel can remotely determine the blockage through the flow data and arrange maintenance personnel to carry out repairs.

[0040] A water outlet 11 is located in the middle of one side of the main pipe 4, with a water trap at the bottom. Once the leachate fills the water trap, it flows outwards along the outlet 11. The outlet 11 is a long, narrow hole, effectively preventing blockage by impurities and scale in the leachate. Its length covers the entire unloading port, facing the slope of the unloading port. Water baffles 13 are installed on both sides of the outlet 11 to prevent leachate from spreading along the main pipe 4 to the side wall 1 of the unloading port, thus reducing the forward spray volume. A flashing plate 12 is installed at the bottom of the outlet at an angle, allowing the leachate to flow outwards along the flashing plate, forming a water curtain effect and spraying onto the garbage rolling down the slope 2 of the unloading port. The edges of the flashing plate 12 are rounded to improve the distribution of leachate and facilitate cleaning if garbage is accidentally snagged.

[0041] The plug 6 is installed at one end of the main pipe 4, outside the side wall 1 of the discharge port. It is connected to the main pipe 4 by threads and has a sealing ring for easy disassembly and to prevent leakage. It is mainly used to drain the accumulated liquid when cleaning the blockage and scale in the main pipe 4, and to rinse the main pipe with clean water to prevent scale from affecting subsequent use.

[0042] This application provides a leachate heating and respraying device, comprising an inlet section and a spraying section. The inlet section includes an inlet pipe, a transition water tank, an overflow pipe, and a flow meter. Heated leachate enters the transition water tank through the inlet pipe, and after offsetting the water flow impact, flows smoothly into the spraying section. When the spraying section becomes clogged, the leachate flows into the waste pit through the overflow pipe, preventing contamination of the unloading platform. When leachate passes through the overflow pipe, the flow meter transmits the flow data to the operation control room, allowing on-duty personnel to determine the blockage status and achieve remote monitoring. The transition water tank adopts a sealed structure with a cover to prevent odor escape. During the construction of the waste pit structure, a sleeve is pre-embedded on the side of the unloading port. After the structural construction is completed, the main pipe is installed by inserting it as a whole. A long, narrow outlet is formed in the middle of the waist side of the main pipe facing the unloading port slope. The length of the outlet covers the unloading port. Water baffles are installed on both sides of the outlet, and an inclined flooding plate is installed at the bottom. After the leachate fills the water trap at the bottom of the main pipe, it flows outward along the flooding plate, forming a water curtain effect. It is sprayed onto the garbage rolling down the unloading port slope, which increases the contact area between leachate and fresh garbage, improves the heating effect, accelerates the melting of fresh garbage in winter, promotes anaerobic fermentation and maturation, increases the amount of leachate released, improves the calorific value of garbage combustion, improves the power generation rate, reduces the input of auxiliary fuel, and reduces operating costs.

[0043] In some embodiments, this application also provides a discharge port for a landfill, including a leachate return spraying device as described above; the leachate flowing out of the leachate return spraying device forms a water curtain and sprays onto the landfill rolling down the slope from the discharge port.

[0044] In some embodiments, this application also provides a waste pit, characterized by including a discharge port of the waste pit as described above.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments are merely illustrative of several implementation methods of this application and are only used to illustrate the technical solutions of this application, not to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. For those skilled in the art, several variations and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A leachate back spraying device for spraying heated leachate into a discharge opening of a landfill cell, the discharge opening comprising a sidewall and a slope; characterized in that, The leachate return spraying device includes: A sleeve is provided on the side wall of the discharge port, and The main pipe is fitted inside the sleeve; a water outlet is provided at the middle of one side of the main pipe, the water outlet is an elongated hole that covers the entire discharge port laterally; a water-retaining plate is installed at the bottom of the water outlet at a downward slope; a water trap is left at the bottom of the main pipe; after the heated leachate fills the water trap, it flows outward along the water outlet and outward along the water-retaining plate to form a water curtain that sprays onto the garbage rolling down the slope from the discharge port.

2. The leachate recirculation device according to claim 1, characterized in that: Water baffles are installed on both sides of the outlet to prevent leachate from spreading along the main pipe to the side wall of the discharge port.

3. The leachate recirculation device according to claim 1, characterized in that: The connection between the main pipe and the sleeve is sealed with fire-resistant sealing material to prevent odor from escaping.

4. The leachate backspay apparatus of claim 1 wherein, Also includes: The water inlet assembly includes an inlet pipe and a transition water tank; the inlet pipe is installed on the side of the transition water tank; one end of the inlet pipe is connected to the bottom of the transition water tank.

5. The leachate recirculation device according to claim 4, characterized in that: A plug is provided at the other end of the main pipe.

6. The leachate backspay device of claim 5, wherein ； The transition water tank has a sealing cover; the plug is connected to the main pipe by threads and is provided with a sealing ring.

7. The leachate backspay apparatus of claim 4 wherein ； The water inlet assembly also includes an overflow pipe and a flow meter; the overflow pipe connects the transition water tank and the discharge port; the flow meter is installed on the overflow pipe.

8. The leachate backspay device of claim 1, wherein ； The flashing has rounded chamfers at its edges.

9. A discharge opening of a refuse pit, characterized in that Includes the leachate return spraying device as described in any one of claims 1-8; the leachate flowing out of the leachate return spraying device forms a water curtain and sprays onto the garbage rolling down the slope from the discharge port.

10. A waste pit characterised in that Includes the discharge port of the waste pool as described in claim 9.

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