Leachate heating and back-spraying system
By designing a leachate heating and back-spraying system and utilizing the heating pool and back-spraying flow path in the collection pool, the problems of low heating efficiency and high maintenance cost in the existing technology are solved, efficient heating of the garbage pit is achieved, and the stable operation of garbage fermentation and incinerator is promoted.
Patent Information
- Application Number
- CN202422952791.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-29
AI Technical Summary
When existing waste incineration plants need to increase the temperature of the garbage pit in winter, the existing leachate heating methods either require the addition of complex heat exchange equipment, resulting in high maintenance costs, or have low heating efficiency and insufficient heating backspray.
A leachate heating and back-spraying system is designed, which is connected to the collection pool through the base pool. The heating part in the heating pool is used to heat the leachate, and the heated leachate is sprayed back into the base pool through the back-spraying path. The heating pool is separated from the collection pool itself for heating, avoiding the extra space occupied by the heat exchanger.
It improves heating efficiency, saves resources, reduces operation and maintenance costs, and increases the temperature of the garbage pit without increasing the amount of leachate treated, promoting the stable operation of garbage fermentation and incinerators.
Smart Images
Figure CN223480827U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste incineration technology, and in particular to a leachate heating and re-spraying system. Background Technology
[0002] After receiving municipal solid waste, waste-to-energy plants first unload the waste into a waste pit for natural fermentation. The fermentation process reduces the moisture content of the waste and increases the calorific value of the waste entering the furnace. The temperature required for the natural and slow fermentation of municipal solid waste is at least 10°C. When the ambient temperature is below 10°C in winter, measures need to be taken to increase the temperature inside the waste pit in order to ensure that the waste can ferment naturally.
[0003] Using the leachate produced by waste fermentation, heated and then sprayed back into the landfill, is a common method for heating landfills. However, existing technologies either require adding a complex heat exchange system to extract a portion of the leachate for heating, resulting in high operating and maintenance costs; or they heat the leachate in the entire leachate collection tank, which has low heating efficiency. This is because, in order to avoid increasing the water content of the waste, the amount of heated and re-sprayed leachate usually accounts for only a small portion of the total leachate generated.
[0004] In view of this, we propose a leachate heating and re-spraying system to solve the above problems. Utility Model Content
[0005] The main purpose of this invention is to provide a leachate heating and re-spraying system, which aims to improve heating efficiency.
[0006] To achieve the above objectives, this utility model proposes a leachate heating and recirculation system, comprising:
[0007] The base pool and the collection pool are connected to each other to collect the leachate in the base pool into the collection pool;
[0008] A heating pool is formed within the collection pool, and leachate can be introduced into the heating pool;
[0009] A heating unit, disposed within the heating tank, is used to heat the leachate; and,
[0010] The return spray path is used to return the heated leachate from the heating pool to the base pool.
[0011] In one embodiment, the heating pool has a plurality of pool sidewalls, at least one of the pool sidewalls being movable along the depth direction of the heating pool to connect the heating pool and the collection pool.
[0012] In one embodiment, a grid plate is provided between the heating pool and the base pool to connect the heating pool and the base pool.
[0013] In one embodiment, the leachate heating and recirculation system further includes a plurality of discharge ports, each of which is spaced apart along a first direction at the bottom of the peripheral sidewall of the base pool;
[0014] The discharge port is used to connect the base pool and the collection pool.
[0015] In one embodiment, the leachate heating and re-spraying system further includes:
[0016] A first connecting channel, located outside the base pool, is connected at one end along a first direction to the collection pool; and...
[0017] Multiple second connection channels, one end of each second connection channel is connected to one side wall of the first connection channel along the second direction, and the other end is connected to each of the discharge ports.
[0018] In one embodiment, the heating element includes at least one connecting pipe, which is disposed at the bottom of the heating pool and extends along the length or width of the heating pool.
[0019] In one embodiment, the return flow path has a spray port and a suction port, the suction port being connected to the heating tank, and the spray port being disposed corresponding to the base tank.
[0020] In one embodiment, the return flow path has a spray port and a suction port, the suction port being connected to the heating tank, and the spray port being disposed corresponding to the base tank.
[0021] In one embodiment, the spray nozzle is provided corresponding to the unloading side and / or loading side of the base pool.
[0022] In one embodiment, the leachate heating and recirculation system further includes at least one of a periodic sewage discharge expansion tank, a transfer pump, and a sewage discharge cooling tank.
[0023] The technical solution of this utility model adopts a configuration where the base tank and the collection tank are connected. Leachate can be introduced from the base tank into the collection tank for collection. A heating tank is formed within the collection tank, allowing leachate to be introduced and collected. The heating element is located inside the heating tank, enabling heating. The heated leachate is then sprayed back into the base tank through a backflow path. This utilizes the space of the collection tank to create a separate heating tank, improving heating efficiency without requiring additional space for a heat exchanger, thus saving resources. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0025] Figure 1 A schematic diagram of an embodiment of the leachate heating and re-spraying system provided by this utility model;
[0026] Figure 2 This is a schematic diagram of another embodiment of the leachate heating and re-spraying system provided by this utility model.
[0027] Explanation of icon numbers:
[0028] 100. Leachate heating and recirculation system; 1. Base tank; 2. Collection tank; 3. Heating tank; 31. Tank sidewall; 4. Heating section; 41. Connecting pipe; 5. Grating plate; 6. Discharge port; 7. First connecting channel; 8. Second connecting channel; 9. Recirculation flow path; 91. Spray nozzle; 10. Feeding side; 11. Discharge side; 12. Periodic sewage discharge expansion container; 13. Transfer pump; 14. Sewage discharge cooling tank.
[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0033] After receiving municipal solid waste, waste-to-energy plants first unload the waste into a waste pit for natural fermentation. The fermentation process reduces the moisture content of the waste and increases the calorific value of the waste entering the furnace. The temperature required for the natural and slow fermentation of municipal solid waste is at least 10°C. When the ambient temperature is below 10°C in winter, measures need to be taken to increase the temperature inside the waste pit in order to ensure that the waste can ferment naturally.
[0034] Using the leachate produced by waste fermentation, heated and then sprayed back into the landfill, is a common method for heating landfills. However, existing technologies either require adding a complex heat exchange system to extract a portion of the leachate for heating, resulting in high operating and maintenance costs; or they heat the leachate in the entire leachate collection tank, which has low heating efficiency. This is because, in order to avoid increasing the water content of the waste, the amount of heated and re-sprayed leachate usually accounts for only a small portion of the total leachate generated.
[0035] In view of this, we propose a leachate heating and re-spraying system to solve the above problems.
[0036] The main purpose of this invention is to provide a leachate heating and re-spraying system, which aims to improve heating efficiency.
[0037] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the leachate heating and re-spraying system includes a base tank 1, a collection tank 2, a heating tank 3, and a heating section 4. The base tank 1 and the collection tank 2 are connected to each other to collect the leachate in the base tank 1 into the collection tank 2. The heating tank 3 is formed in the collection tank 2 and can be used to introduce leachate. The heating section 4 is disposed in the heating tank 3 to heat the leachate. The re-spraying flow path 9 is used to re-spray the heated leachate in the heating tank 3 back into the base tank 1.
[0038] The technical solution of this utility model adopts a configuration where the base tank 1 and the collection tank 2 are connected. Leachate can be introduced from the base tank 1 into the collection tank 2 for collection. The heating tank 3 is formed within the collection tank 2, allowing leachate to be introduced into the heating tank 3 for collection. The heating part 4 is located inside the heating tank 3, meaning the heating tank 3 can be heated. Then, the heated leachate can be sprayed back into the base tank 1 through the provided return spray path 9. By utilizing the space of the collection tank 2 to separate the heating tank 3 for heating, the heating effect is improved while eliminating the need for a separate heat exchanger, thus saving resources.
[0039] It is understood that the heating pool 3 can be set up by using a partition in the collection pool 2 to divide the collection pool 2 into two spaces for collection and heating respectively; or, the collection pool 2 can be enclosed by multiple partitions to form a separate space for use as the heating pool 3; or, a pre-enclosed frame can be placed in the collection pool 2 to be used as a separate heating space.
[0040] It is understood that the heating part 4 can be configured as a heating tube, a heating coil, or a heating plate, etc.
[0041] It should be noted that the backflow path 9 is located outside the base pool 1 to facilitate backflow.
[0042] Specifically, in one embodiment, the heating part 4 includes at least one connecting pipe 41, which is disposed at the bottom of the heating pool 3 and extends along the length of the heating pool 3.
[0043] With this configuration, the heating unit 4 can heat the heating pool 3, and by placing the connecting pipe 41 at the bottom of the heating pool 3, the heat transfer effect is better, thereby improving the heating efficiency in the heating pool 3.
[0044] It is understood that multiple connecting pipes 41 can be provided, with each connecting pipe 41 laid side by side along its length at the bottom of the heating pool 3 to improve the heating effect.
[0045] In one embodiment, the heating part 4 includes at least one connecting pipe 41, which is disposed at the bottom of the heating pool 3 and extends along the width direction of the heating pool 3.
[0046] With this configuration, the heating unit 4 can heat the heating pool 3, and by placing the connecting pipe 41 at the bottom of the heating pool 3, the heat transfer effect is better, thereby improving the heating efficiency in the heating pool 3.
[0047] In one embodiment, the heating pool 3 has a plurality of pool sidewalls 31, at least one of the pool sidewalls 31 being movable along the depth direction of the heating pool 3 to connect the heating pool 3 and the collection pool 2.
[0048] Thus, by utilizing at least one of the pool sidewalls 31 that can move along the depth direction of the heating pool 3, the functionality of the heating pool 3 is improved, thereby enabling control of the flow between the heating pool 3 and the collection pool 2, achieving the purpose of connecting or separating the collection pool 2 and the heating pool 3. That is, when the temperature is high and heating of the waste pit is not required, the collection pool 2 and the heating pool 3 can be used in a connected manner.
[0049] It is understood that the movement of the pool sidewall 31 can be achieved by providing a gate that can be flipped open and closed within the pool sidewall 31 to achieve the purpose of connecting or separating the collection pool 2 and the heating pool 3; or by providing a gate plate that can move along the depth direction of the heating pool 3 within the pool sidewall 31 to achieve the purpose of connecting or separating the collection pool 2 and the heating pool 3; or by providing a movable door that can move along the width or length direction of the heating pool 3 within the pool sidewall 31 to achieve the purpose of connecting or separating the collection pool 2 and the heating pool 3.
[0050] In one embodiment, a grid plate 5 is provided between the heating pool 3 and the base pool 1 to connect the heating pool 3 and the base pool 1.
[0051] This configuration separates the heating pool 3 from the base pool 1 via the grid plate 5, blocking the waste in the base pool 1 and improving the efficiency of leachate collection in the heating pool 3.
[0052] In one embodiment, the leachate heating and recirculation system 100 further includes a plurality of discharge ports 6, each of the discharge ports 6 being spaced apart at the bottom of the peripheral sidewall of the base tank 1 along a first direction; the discharge ports 6 are used to connect the base tank 1 with the collection tank 2.
[0053] Thus, by setting up multiple discharge ports 6, the leachate in the base pool 1 can be quickly discharged to the collection pool 2 for collection, thereby improving the treatment efficiency of the leachate.
[0054] In one embodiment, the leachate heating and recirculation system 100 further includes a first connecting channel 7 and a plurality of second connecting channels 8. The first connecting channel 7 is located outside the base tank 1, and one end of the first connecting channel 7 along a first direction is connected to the collection tank 2. One end of each of the second connecting channels 8 is connected to a side wall of the first connecting channel 7 along a second direction, and the other end is connected to each of the discharge ports 6.
[0055] With this configuration, the leachate can be discharged through each of the discharge ports 6 into the second connection channels 8 and then introduced into the collection pool 2 through the first connection channel 7, thus achieving the purpose of centralized discharge and accelerated flow.
[0056] It is understood that the first connecting channel 7 and the second connecting channel 8 can be configured as either closed or semi-closed pipes.
[0057] In one embodiment, the return flow path 9 has a spray port 91 and a suction port, the suction port being connected to the heating tank 3, and the spray port 91 being provided corresponding to the base tank 1.
[0058] With this configuration, the leachate can be drawn from the heating tank 3 through the suction port via the return flow path 9, and then the heated leachate can be sprayed back into the base tank 1 through the spray port 91. This can increase the temperature in the base tank 1 during winter, which is beneficial for the fermentation of waste in the base tank 1, and improves the calorific value of the waste entering the furnace and the operational stability of the incinerator.
[0059] In one embodiment, the spray nozzle 91 is positioned higher than the suction port.
[0060] Thus, by setting the spray nozzle 91 higher than the suction port, it is convenient to re-spray the leachate.
[0061] In one embodiment, the spray nozzle 91 is provided corresponding to the unloading side 11 of the base pool 1.
[0062] It should be added that a discharge pump is provided on the discharge side 11, which can be connected to the spray port 91 to extract leachate from the heating pool 3 and spray it back at the discharge side 11.
[0063] In one embodiment, the spray nozzle 91 is provided corresponding to the feeding side 10 of the base pool 1.
[0064] It should be added that a feeding pump is provided on the feeding side 10, and the spray nozzle 91 can be connected through the feeding pump to draw leachate from the heating pool 3 and spray it back at the feeding side 10. Compared with the existing method of selecting the back spray position only on the unloading side, it can spray a large area downward from the feeding side 10 during the back spray, thereby improving the back spray efficiency.
[0065] In one embodiment, the leachate heating and recirculation system 100 further includes at least one of a periodic sewage discharge expansion container 12, a transfer pump 13, and a sewage discharge cooling tank 14.
[0066] Thus, the periodic sewage discharge expansion container 12 can discharge sewage, the transfer pump 13 can transport sewage, and the sewage discharge cooling pool 14 can receive sewage. Specifically, when heating of the landfill pit is required in winter, the collection pool 2 and the heating pool 3 are completely separated. Sewage discharged from the periodic sewage discharge expansion container 12 can be used as a heat source. The sewage is then pumped by the transfer pump 13 to the connecting pipe 41 at the bottom of the heating pool 3 to heat the leachate. The heated leachate then flows into the sewage discharge cooling pool 14, achieving the goal of heating the leachate by introducing the heat-exchanged sewage into the power plant's existing sewage discharge cooling pool and utilizing the waste heat from the power plant boiler's sewage discharge. This increases the winter temperature of the landfill pit, which is beneficial for waste fermentation, improves the calorific value of the waste entering the incinerator, and enhances the operational stability of the incinerator. It also saves investment, and the entire system does not increase the amount of leachate treated.
[0067] It should be explained that the periodic sewage expansion container 12, the transfer pump 13, and the sewage cooling pool 14 can be configured such that the periodic sewage expansion container 12 is connected to the transfer pump 13, the transfer pump 13 is connected to the connecting pipe 41, and the sewage cooling pool 14 is connected to the connecting pipe 41.
[0068] It should be noted that the periodic sewage discharge expansion container 12 is an existing device of the power plant's thermal power system. Boiler wastewater is discharged into the sewage discharge cooling pool 14 after passing through the periodic sewage discharge expansion container 12. The sewage discharged from the periodic sewage discharge expansion container 12 has heat. By transporting the sewage with heat to the connecting pipe 41, the heating pool 3 is heated, thereby achieving the purpose of heating the leachate to utilize waste heat.
[0069] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A leachate heating and recirculation system, characterized in that, include: The base pool and the collection pool are connected to each other to collect the leachate in the base pool into the collection pool; A heating pool is formed within the collection pool, and leachate can be introduced into the heating pool; A heating unit is provided inside the heating tank for heating the leachate; as well as, The return spray path is used to return the heated leachate from the heating pool to the base pool.
2. The leachate heating and re-spraying system as described in claim 1, characterized in that, The heating pool has multiple pool sidewalls, at least one of which is movable along the depth direction of the heating pool to connect the heating pool and the collection pool.
3. The leachate heating and re-spraying system as described in claim 1, characterized in that, A grid plate is provided between the heating pool and the base pool to connect the heating pool and the base pool.
4. The leachate heating and re-spraying system as described in claim 1, characterized in that, The leachate heating and re-spraying system also includes multiple discharge ports, each of which is spaced apart at the bottom of the peripheral sidewall of the base pool along a first direction; The discharge port is used to connect the base pool and the collection pool.
5. The leachate heating and re-spraying system as described in claim 4, characterized in that, The leachate heating and re-spraying system also includes: A first connecting channel, located outside the base pool, is connected at one end along a first direction to the collection pool; and... Multiple second connection channels, one end of each second connection channel is connected to one side wall of the first connection channel along the second direction, and the other end is connected to each of the discharge ports.
6. The leachate heating and re-spraying system as described in claim 1, characterized in that, The heating element includes at least one connecting pipe, which is located at the bottom of the heating pool and extends along the length or width of the heating pool.
7. The leachate heating and recirculation system as described in claim 1, characterized in that, The return flow path has a spray port and a suction port. The suction port is connected to the heating tank, and the spray port is set corresponding to the base tank.
8. The leachate heating and recirculation system as described in claim 7, characterized in that, The spray nozzle is positioned higher than the suction port.
9. The leachate heating and re-spraying system as described in claim 8, characterized in that, The spray nozzles are provided on the unloading side and / or loading side of the base pool.
10. The leachate heating and re-spraying system as described in claim 1, characterized in that, The leachate heating and recirculation system also includes at least one of the following: a periodic sewage discharge expansion container, a transfer pump, and a sewage discharge cooling tank.