Drying incineration system for wet sludge
By combining a drying device and a hot air circulation system with a briquetting mechanism and an incineration system, the problem of poor drying effect of wet sludge has been solved, achieving efficient sludge drying and resource utilization, and reducing environmental pollution.
Patent Information
- Application Number
- CN202423160410.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The poor drying effect of wet sludge in existing technologies is mainly due to the small heat transfer area, which leads to low drying efficiency.
The system employs a drying device and a hot air circulation system. Wet sludge is transported through the air holes of a conveyor belt, and a circulating fan drives the hot air circulation to increase the contact area between the hot air and the wet sludge. At the same time, a sludge briquetting mechanism is used to form sludge briquettes to further increase the contact area, and the sludge is further processed through an incineration system.
It significantly improves the drying efficiency of wet sludge, realizes the harmless, reduced and resource-based treatment of sludge, reduces environmental pollution, and improves thermal energy utilization and drying effect.
Smart Images
Figure CN223610130U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sludge disposal technical field especially, relates to a kind of drying incineration system of wet sludge. BACKGROUND
[0002] Because wet sludge contains pathogenic bacteria, parasitic egg, heavy metal and various refractory organic compounds, it will endanger human health and plant growth, so it needs to be concentratedly handled. Wet sludge is often needed to be pretreated by drying due to its high water content and low calorific value, to reduce the water content and volume of wet sludge and kill pathogens, and then to be treated by landfill, incineration, composting, land use and other subsequent treatments.
[0003] In the prior art, the drying of wet sludge is mostly through contact heat transfer drying, that is, the transmission belt for transmitting wet sludge or the support plate for supporting wet sludge is heated, resulting in a small heating area of wet sludge and poor drying effect. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of drying incineration system of wet sludge, which can increase the contact area of hot air and wet sludge and improve the drying effect of wet sludge.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A kind of drying incineration system of wet sludge, comprising:
[0007] Drying device, including drying bin and transmission mechanism, the drying bin is equipped with air inlet, first air outlet, feed inlet and discharge port, the transmission mechanism includes transmission belt, the transmission belt is opened with multiple air holes, the transmission belt is configured to transmit wet sludge entered by the feed inlet to the discharge port;
[0008] Hot air circulation pipeline, two ends of the hot air circulation pipeline are connected with the air inlet and the first air outlet respectively;
[0009] Circulating fan, set on the hot air circulation pipeline, the circulating fan is configured to drive the gas flow in the hot air circulation pipeline.
[0010] As an optional solution of the above drying incineration system of wet sludge, the drying device further comprises a briquetting mechanism, the briquetting mechanism is arranged at the feed inlet, the briquetting mechanism comprises two briquetting discs rotating in opposite directions synchronously, the outer periphery of the briquetting disc is provided with a briquetting groove, the outer periphery surfaces of the two briquetting discs abut to form a briquetting channel with the two briquetting grooves, and the wet sludge can form sludge blocks through the briquetting channel.
[0011] As an alternative to the above-mentioned wet sludge drying incineration system, the briquetting disc is provided with a plurality of cutting protrusions at intervals in the circumferential direction, and the cutting protrusions of the two briquetting discs correspond to each other to cut the wet sludge so that the wet sludge forms the sludge blocks.
[0012] As an alternative to the above-mentioned wet sludge drying incineration system, the size of the air hole is smaller than the size of the sludge block to avoid the sludge block from falling off the air hole.
[0013] As an alternative to the above-mentioned wet sludge drying incineration system, the sludge block is in the form of a strip or a particle.
[0014] As an alternative to the above-mentioned wet sludge drying incineration system, the conveying mechanism includes a plurality of conveying belts arranged at intervals in the vertical direction, and the wet sludge sequentially passes through the plurality of conveying belts from top to bottom.
[0015] As an alternative to the above-mentioned wet sludge drying incineration system, in the vertical direction, the plurality of conveying belts are staggered, and the conveying directions of adjacent two conveying belts are opposite, and the wet sludge can be received and conveyed by the lower conveying belt after falling off from the upper conveying belt.
[0016] As an alternative to the above-mentioned wet sludge drying incineration system, the drying incineration system further includes an incineration device, which comprises:
[0017] a dry material bin connected to the discharge port to store dry sludge;
[0018] a gasification furnace connected to the dry material bin by a conveying machine, which can gasify the dry sludge and produce combustible gas;
[0019] an incineration furnace connected to the gasification furnace to burn the combustible gas in the incineration furnace;
[0020] a first heat exchanger comprising a first shell and a first heat exchange pipeline arranged in the shell, the first shell being connected to the incineration furnace, and the first heat exchange pipeline being connected to the air inlet.
[0021] As an alternative to the above-mentioned wet sludge drying incineration system, the drying incineration system further includes a dehumidification device, which comprises a dehumidification fan, and the drying bin is provided with a second air outlet, and the dehumidification fan is connected to the second air outlet.
[0022] As an optional solution of the dry incineration system of the wet sludge, the dehumidifying device further comprises a second heat exchanger, the second heat exchanger comprises a second shell and a second heat exchange pipeline arranged in the shell, the second shell is communicated with the dehumidifying fan, and the second heat exchange pipeline is communicated with the hot air circulation pipeline.
[0023] The present application has the following beneficial effects:
[0024] The utility model provides a dry incineration system of wet sludge. In the dry incineration system, the drying bin is used for drying the wet sludge, the circulating fan makes the hot air circulate through the drying bin through the hot air circulation pipeline, and the hot air can pass through the air holes of the conveying belt, thereby increasing the contact area of the hot air and the wet sludge and improving the drying effect of the wet sludge. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is the structure schematic diagram of the dry incineration system of wet sludge provided by the utility model;
[0026] Figure 2 is the structure schematic diagram of the block making mechanism provided by the utility model;
[0027] Figure 3 is the structure schematic diagram of the conveying belt provided by the utility model.
[0028] In the drawings:
[0029] 1, drying device; 11, drying bin; 111, air inlet; 112, first air outlet; 113, feeding port; 114, discharging port; 115, second air outlet; 12, conveying belt;
[0030] 2, hot air circulation pipeline;
[0031] 3, circulating fan;
[0032] 4, block making mechanism; 41, block making disc; 411, block making groove; 412, cutting protrusion; 42, block making channel;
[0033] 5, incineration device; 51, dry material bin; 52, gasification furnace; 53, incineration furnace; 54, first heat exchanger; 541, first shell; 542, first heat exchange pipeline;
[0034] 6, dehumidifying device; 61, dehumidifying fan; 62, second heat exchanger; 621, second shell; 622, second heat exchange pipeline;
[0035] 7, first flue gas treatment device; 71, first spray tower; 72, first chimney;
[0036] 8, second flue gas treatment device; 81, second spray tower; 82, second chimney. DETAILED DESCRIPTION
[0037] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0038] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.
[0039] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0040] Unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0041] The technical scheme of the present application is further illustrated below by combining the drawings and through the specific embodiments.
[0042] The present embodiment provides a wet sludge drying incineration system (hereinafter referred to as drying incineration system), such as Figure 1As shown, the drying incineration system includes a drying device 1 and a circulating fan 3. The drying device 1 includes a drying bin 11 for drying wet sludge to form dry sludge. The drying bin 11 is provided with a feed inlet 113 for feeding wet sludge and a discharge outlet 114 for discharging dry sludge. In order to make hot air circulate, the circulating fan 3 is arranged on the hot air circulation pipeline 2, and the two ends of the hot air circulation pipeline 2 are respectively connected to the air inlet 111 and the first air outlet 112 of the drying bin 11.
[0043] In order to facilitate the movement of wet sludge in the drying bin 11, the drying device 1 further includes a conveying mechanism, which includes a conveying belt 12 provided with a plurality of air holes. The conveying belt 12 is configured to convey the wet sludge entering through the feed inlet 113 to the discharge outlet 114.
[0044] In the drying incineration system, the drying bin 11 is used to dry wet sludge, the circulating fan 3 enables hot air to circulate through the drying bin 11 through the hot air circulation pipeline 2. During the movement of wet sludge from the feed inlet 113 to the discharge outlet 114 driven by the conveying belt 12, hot air can pass through the air holes of the conveying belt 12, thereby increasing the contact area between hot air and wet sludge and improving the drying effect of wet sludge.
[0045] Generally, in the process of converting wet sludge into dry sludge, the water in the wet sludge is dried, but the dry sludge still contains microorganisms, parasite eggs and organic compounds. Figure 1 As shown, in order to further process, the drying incineration system further includes a dry material bin 51, a gasification furnace 52, an incineration furnace 53 and a first heat exchanger 54. The dry material bin 51 is connected to the discharge outlet 114 to store dry sludge. The gasification furnace 52 is connected to the dry material bin 51 by a conveying machine. The gasification furnace 52 can gasify dry sludge and produce combustible gas. The incineration furnace 53 is connected to the gasification furnace 52 to burn the combustible gas in the incineration furnace 53. The first heat exchanger 54 includes a first outer shell 541 and a first heat exchange pipeline 542 arranged in the outer shell. The first outer shell 541 is connected to the incineration furnace 53, and the first heat exchange pipeline 542 is connected to the air inlet 111.
[0046] The dry material bin 51 is used to store dry sludge discharged from the discharge outlet 114. When the storage amount reaches a certain value, the dry sludge in the dry material bin 51 will be conveyed to the gasification furnace 52 by the conveying machine. At this time, the dry sludge will be pyrolyzed and gasified in the gasification furnace 52, that is, under anaerobic or hypoxic conditions, the macromolecules of organic components in the dry sludge will be broken, producing combustible gas and residue.
[0047] The pyrolysis gasification technology can not only realize the harmless, reduction and resource utilization of dry sludge, but also effectively overcome the dioxin pollution problem caused by incineration. The residue is discharged through the residue discharge port at the bottom of the gasification furnace 52, and the combustible gas is burned in the incinerator 53 after entering the incinerator 53. The released heat can pass through the first heat exchanger 54, and the heat is absorbed by the gas in the first heat exchanger pipeline 542. The gas in the first heat exchanger pipeline 542 enters the drying chamber 11 through the air inlet 111, providing heat source for the drying of wet sludge.
[0048] The pyrolysis gasification of dry sludge can convert low-grade heat source into high-grade heat source, increase the number of heat sources of the drying chamber 11, improve the heat energy utilization rate, and greatly reduce the exhaust gas volume and environmental pollution.
[0049] Further, the incineration device 5 further comprises a gas purification furnace. The combustible gas generated by the gasification furnace 52 is preferentially subjected to multi-stage washing through the gas purification furnace, and after the dust is removed and desulfurization is completed, it is burned in the incinerator 53. This can reduce the pollution of the finally discharged flue gas, thereby reducing the cost of flue gas treatment.
[0050] As shown in Figure 1 , the drying and incineration system further comprises a first flue gas treatment device 7, and the first flue gas treatment device 7 is connected with the first heat exchanger 54. The delayed treatment device comprises a plurality of first spray towers 71 connected in series. The flue gas generated after the combustion of the combustible gas is purified by passing through the plurality of spray towers, and the remaining clean gas is discharged through the first chimney 72.
[0051] It can be understood that the humidity in the drying chamber 11 will increase with the increase of the amount of wet sludge being dried, resulting in gradually poor drying effect of the wet sludge. As shown in Figure 1 , to solve this problem, the drying and incineration system further comprises a dehumidification device 6, and the dehumidification device 6 comprises a dehumidification fan 61. The drying chamber 11 is provided with a second air outlet 115, and the dehumidification fan 61 is connected with the second air outlet 115.
[0052] The dehumidification fan 61 can extract part of the gas in the drying chamber 11 through the second air outlet 115, thereby reducing the total amount of water vapor of the gas discharged from the first air outlet 112, and also reducing the humidity of the gas blown into the air inlet 111 by the circulating fan 3, so as to ensure that the humidity in the drying chamber 11 is within a suitable range, and facilitate the heating and drying of the moisture of the wet sludge.
[0053] Further, the dehumidifying device 6 further comprises a second heat exchanger 62, the second heat exchanger 62 comprises a second shell 621 and a second heat exchange pipeline 622 arranged in the shell, the second shell 621 is communicated with the dehumidifying fan 61, and the second heat exchange pipeline 622 is communicated with the hot air circulation pipeline 2. Wherein, the temperature of the gas discharged from the second air outlet 115 is still high, after dehumidification by the dehumidifying fan 61, the waste heat is recovered by the second heat exchanger 62, which is conducive to improving the utilization rate of heat energy and reducing energy consumption.
[0054] It is worth noting that, in addition to water vapor, the gas discharged from the second air outlet 115 also contains some dust, polluting gas or microorganisms and the like. As shown in Figure 1 In order to avoid polluting the environment, the dehumidifying device 6 further comprises a second flue gas treatment device 8, the second flue gas treatment device 8 is connected with the second heat exchanger 62, and the second flue gas treatment device 8 comprises a plurality of second spray towers 81 connected in series. After the gas passing through the second heat exchanger 62, the dust, polluting gas or microorganisms contained therein are purified, and the remaining clean gas is discharged through the second chimney 82.
[0055] As shown in Figure 1 and Figure 2 In order to improve the contact area between the wet sludge and the hot air, the drying device 1 further comprises a briquetting mechanism 4, the briquetting mechanism 4 is arranged at the feeding port 113, the briquetting mechanism 4 comprises two briquetting discs 41 rotating in opposite directions, the outer periphery of the briquetting disc 41 is provided with a briquetting groove 411, and the outer periphery surfaces of the two briquetting discs 41 abut to form a briquetting channel 42 with the two briquetting grooves 411, and the wet sludge can form sludge blocks through the briquetting channel 42.
[0056] Through the opposite rotation of the two briquetting discs 41, when the wet sludge passes between the two briquetting discs 41, the wet sludge is extruded by the briquetting grooves 411 of the two briquetting discs 41, and the wet sludge is extruded to form block-shaped sludge blocks, which can greatly improve the specific surface area, that is, improve the total contact area between the wet sludge and the hot air, and when the sludge blocks are transported by the conveying belt 12, they are convenient to be dried by the hot air, thereby improving the drying efficiency.
[0057] Further, the briquetting disc 41 is circumferentially spaced apart from a plurality of cutting protrusions 412, and the cutting protrusions 412 of the two briquetting discs 41 correspond one by one to cut the wet sludge to form sludge blocks. When the two briquetting discs 41 extrude the wet sludge, the cutting protrusions 412 of the two briquetting discs 41 converge to perform a cutting operation on the wet sludge once, so that the sludge blocks fall onto the conveying belt 12. It is worth noting that, by adjusting the number of cutting protrusions 412 of the briquetting disc 41, the distance between the adjacent two cutting protrusions 412 can be controlled, that is, the size of the sludge blocks can be controlled.
[0058] In this embodiment, the sludge blocks are either strip-shaped or granular. When there are more cutting protrusions 412 on the sludge forming disc 41, the sludge blocks are granular; when there are fewer cutting protrusions 412 on the sludge forming disc 41, the sludge blocks are strip-shaped.
[0059] It is worth noting that the size of the pores is smaller than the size of the sludge block to prevent the sludge block from falling out of the pores. In other words, it is necessary to ensure that the sludge block will not fall out of the pores. In this embodiment, the pores are circular, so the sludge block has at least one dimension larger than the diameter of the pore.
[0060] like Figure 1 and Figure 3 As shown, in order to ensure that the wet sludge is fully dried, the conveying mechanism includes multiple conveyor belts 12, which are spaced apart vertically. The wet sludge passes through the multiple conveyor belts 12 sequentially from top to bottom. The sequential transport of the wet sludge by the multiple conveyor belts 12 can significantly increase the drying time of the wet sludge, thereby improving the drying effect.
[0061] Specifically, multiple conveyor belts 12 are staggered along the vertical direction, and the transmission directions of two adjacent conveyor belts 12 are opposite. Figure 3 The arrows in the diagram indicate the transport direction of conveyor belt 12. After falling from one conveyor belt 12, the wet sludge can be caught and transported by the next conveyor belt 12. In other words, the next conveyor belt 12 extends downstream of the adjacent conveyor belt 12 above it in the transport direction, ensuring that the wet sludge can land on the adjacent next conveyor belt 12 at the downstream end of the transport direction of one conveyor belt 12 and be transported in the opposite direction. This extends the total transport distance of the wet sludge while saving space.
[0062] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A wet sludge drying and incineration system, characterized by, The application relates to a dry sludge incineration system. The dry sludge incineration system comprises a drying device (1), a hot air circulation pipeline (2), and a circulating fan (3). The drying device (1) comprises a drying bin (11) and a conveying mechanism. The drying bin (11) is provided with an air inlet (111), a first air outlet (112), a feed inlet (113), and a discharge outlet (114).
2. The wet sludge drying and incineration system according to claim 1, characterized in that, The conveying mechanism comprises a conveying belt (12) provided with a plurality of air holes.
3. The wet sludge drying and incineration system according to claim 2, characterized in that, The conveying belt (12) is configured to convey wet sludge entering through the feed inlet (113) to the discharge outlet (114).
4. The wet sludge drying and incineration system according to claim 2, characterized in that, The hot air circulation pipeline (2) is connected to the air inlet (111) and the first air outlet (112) at two ends.
5. The wet sludge drying and incineration system as claimed in claim 2, wherein, The circulating fan (3) is arranged on the hot air circulation pipeline (2) and is configured to drive the flow of gas in the hot air circulation pipeline (2).
6. The wet sludge drying and incineration system as claimed in claim 1, wherein, The drying device (1) further comprises a briquetting mechanism (4) arranged at the feed inlet (113).
7. The wet sludge drying and incineration system according to claim 6, characterized in that, The briquetting mechanism (4) comprises two briquetting discs (41) rotating in opposite directions synchronously.
8. The wet sludge drying and incineration system according to any one of claims 1 to 7, characterized in that, The outer periphery of the briquetting disc (41) is provided with a briquetting groove (411). The outer peripheries of the two briquetting discs (41) abut to form a briquetting channel (42) with the two briquetting grooves (411). The briquetting disc (41) is provided with a plurality of cutting protrusions (412) arranged at intervals in the circumferential direction. The cutting protrusions (412) of the two briquetting discs (41) correspond to each other to cut the wet sludge to form sludge blocks. The size of the air holes is smaller than that of the sludge blocks to prevent the sludge blocks from falling off the air holes. The sludge blocks are in the form of strips or particles. The conveying mechanism comprises a plurality of conveying belts (12) arranged at intervals in the vertical direction. The wet sludge passes through the plurality of conveying belts (12) from top to bottom in sequence. In the vertical direction, the plurality of conveying belts (12) are arranged staggeredly, and the conveying directions of adjacent two conveying belts (12) are opposite. After the wet sludge falls off one conveying belt (12), it can be received and conveyed by the next conveying belt (12) below. The dry sludge incineration system further comprises an incineration device (5). The dry material bin (51) is connected to the discharge outlet (114) to store dry sludge. The gasification furnace (52) is connected to the dry material bin (51) through a conveying machine. The gasification furnace (52) can gasify the dry sludge to produce combustible gas. The incineration furnace (53) is connected to the gasification furnace (52) to make the combustible gas burn in the incineration furnace (53). The first heat exchanger (54) comprises a first shell (541) and a first heat exchange pipeline (542) arranged in the shell. The first shell (541) is connected to the incineration furnace (53), and the first heat exchange pipeline (542) is connected to the air inlet (111).
9. The wet sludge drying and incineration system according to any one of claims 1 to 7, characterized in that, The dry incineration system further comprises a dehumidification device (6), the dehumidification device (6) comprises a dehumidification fan (61), the drying bin (11) is provided with a second air outlet (115), and the dehumidification fan (61) is in communication with the second air outlet (115).
10. The wet sludge drying and incineration system according to claim 9, characterized in that, The dehumidification device (6) further comprises a second heat exchanger (62), the second heat exchanger (62) comprises a second shell (621) and a second heat exchange pipeline (622) arranged in the shell, the second shell (621) is in communication with the dehumidification fan (61), and the second heat exchange pipeline (622) is in communication with the hot air circulation pipeline (2).