Sludge incineration system capable of preventing high-temperature feeding blockage of sludge

Abstract

The utility model relates to the technical field of sludge treatment, in particular to a sludge incineration system capable of preventing high-temperature feeding blockage of sludge, which comprises an incinerator, a flue gas cooler, a bag-type dust collector and a chimney which are sequentially connected, a sludge feeding pipe is arranged at the top of the incinerator, and a sludge water-cooled jacket is sleeved outside the sludge feeding pipe. A sludge feeding pipe is inserted into the sludge feeding pipe, the sludge feeding pipe is connected with the sludge feeding pipe through a flange, a plurality of communicated vent holes are formed in the flange and the sludge feeding pipe, the outer ends of the vent holes are connected with a cooling air pipe, and cooling air introduced by the cooling air pipe is blown into a circular seam between the sludge feeding pipe and the sludge feeding pipe. An auxiliary material feeding pipe is arranged on the side face of the incinerator, and an auxiliary material water cooling sleeve is arranged outside the auxiliary material feeding pipe in a sleeving mode. Sludge is prevented from being heated and coked through double cooling of water cooling and air cooling.

Description

Technical Field

[0001] This utility model belongs to the field of sludge treatment technology, and specifically relates to a sludge incineration system that prevents sludge from clogging during high-temperature feeding. Background Technology

[0002] Currently, the actual effective treatment rate of sludge is less than one-quarter, which not only wastes resources but also causes significant environmental pollution. To achieve the reduction, harmlessness, and resource recovery of this sludge, different treatment processes must be selected based on the different characteristics of the sludge.

[0003] The most common methods for sludge disposal include sanitary landfill, composting and soil amendment, sludge incineration, and use in building materials. However, because sludge generally has high water content, low calorific value, and high viscosity, a continuous and smooth feed of sludge into the incineration system is a prerequisite for its use. This is because sludge often clogs at the feed inlet, which can severely impact the entire system.

[0004] 1) The sludge is not transported into the incineration system, which directly causes the interruption of raw material transportation, which has a great impact on incineration, and directly leads to the paralysis of the incineration system and the inability of the system to operate continuously and stably.

[0005] 2) If the material blockage lasts for a while, the incineration system will cool down, and the unit cannot be restarted immediately. Before restarting, the accumulated material in the system must be cleaned, resulting in a waste of manpower, materials and time.

[0006] 3) If the material is conveyed using equipment such as a booster pump, blockage in the material pipe will cause excessive pressure inside the booster pump, which may lead to the shattering of the observation mirror or even cause injury, posing a serious safety hazard.

[0007] Therefore, ensuring smooth sludge transport and preventing clogging at the feed inlet, especially under high-temperature operating conditions, is crucial for the successful treatment of sludge using an incineration system. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a sludge incineration system that prevents sludge from clogging at high temperature during feeding, thereby solving the problem of high temperature clogging at the feed inlet of the sludge incinerator.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A sludge incineration system for preventing sludge blockage during high-temperature feeding includes an incinerator, a flue gas cooler, a bag filter, and a chimney connected in sequence. A sludge feed pipe is located at the top of the incinerator, and a sludge water-cooling jacket is fitted over the sludge feed pipe. A sludge feeding pipe is inserted into the sludge feed pipe, and the sludge feed pipe and the sludge feed pipe are connected by a flange. Multiple interconnected vent holes are provided inside the flange and the sludge feed pipe. The outer ends of the vent holes are connected to a cooling air duct. Cooling air introduced through the cooling air duct is blown into the annular gap between the sludge feed pipe and the sludge feeding pipe. An auxiliary material feed pipe is located on the side of the incinerator, and an auxiliary material water-cooling jacket is fitted over the auxiliary material feed pipe.

[0011] The incinerator is a fluidized bed incinerator.

[0012] The vent is inclined from the flange toward the inner wall of the sludge feed pipe.

[0013] The vent is connected to the cooling duct via a pipe fitting attached to the flange.

[0014] The width of the circumferential gap between the sludge feed pipe and the sludge feed tube is 2-5mm.

[0015] The sludge feed pipe is connected to the raw material pump.

[0016] The auxiliary material feeding pipe is equipped with a screw feeder.

[0017] Compared with existing technologies, the beneficial effects of this utility model are:

[0018] 1) The sludge feed pipe is wrapped with a sludge water cooling jacket. When the system is running, the circulating water in the water cooling jacket can remove some of the heat near the feed pipe, preventing the sludge from being heated and carbonized at the feed port and coking, thus blocking the feed port.

[0019] 2) Cooling air is blown into the gap between the sludge feed pipe and the sludge feed tube, forming an air ring around the sludge feed tube, which again carries away some of the heat near the sludge feed tube, achieving a cooling effect. At the same time, the cooling air can disperse the material at the outlet of the sludge feed pipe, so that the material is evenly sent into the incineration system for incineration.

[0020] 3) When the system operates at high temperatures, the sludge is fully cooled by both water cooling and air cooling, which prevents the sludge from slagging at the feed inlet and prevents high-temperature blockage at the feed inlet of the sludge incinerator.

[0021] 4) It has a simple structure, requires little investment, and can be modified from existing sludge incineration systems with minimal alterations, making it easy to implement and promote. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 for Figure 1 Partial schematic diagram.

[0024] In the diagram: 1. Incinerator; 2. Flue gas cooler; 3. Baghouse dust collector; 4. Chimney; 5. Sludge feed pipe; 6. Sludge water cooling jacket; 7. Sludge feed pipe; 8. Flange; 9. Vent; 10. Cooling air duct; 11. Auxiliary material feed pipe; 12. Auxiliary material water cooling jacket; 13. Pipe joint; 14. Screw feeder; 15. Raw material pump. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figures 1-2 A sludge incineration system for preventing sludge blockage during high-temperature feeding includes an incinerator 1, a flue gas cooler 2, a bag filter 3, and a chimney 4 connected in sequence. The top of the incinerator 1 is provided with a sludge feed pipe 5, and a sludge water cooling jacket 6 is fitted over the outside of the sludge feed pipe 5. A sludge feeding pipe 7 is inserted into the sludge feed pipe 5. The sludge feed pipe 5 and the sludge feeding pipe 7 are connected by a flange 8. The flange 8 and the inside of the sludge feed pipe 5 are provided with multiple interconnected vent holes 9. The outer ends of the vent holes 9 are connected to a cooling air duct 10. Cooling air introduced into the cooling air duct 10 is blown into the annular gap between the sludge feed pipe 5 and the sludge feeding pipe 7. An auxiliary material feed pipe 11 is provided on the side of the incinerator 1, and an auxiliary material water cooling jacket 12 is fitted over the outside of the auxiliary material feed pipe 11.

[0028] The incinerator 1 is a fluidized bed incinerator.

[0029] The vent 9 is inclined from the flange 8 toward the inner wall of the sludge feed pipe 5.

[0030] The vent 9 is connected to the cooling air duct 10 via a pipe joint 13 connected to the flange 8.

[0031] The width of the circumferential gap between the sludge feed pipe 5 and the sludge feeding pipe 7 is 2-5 mm.

[0032] The sludge feed pipe 7 is connected to the raw material pump 15.

[0033] The auxiliary material feeding pipe 11 is equipped with a screw feeder 14.

[0034] The cooling air is compressed air.

[0035] When the sludge incineration system processes sludge, after a period of operation, the incinerator 1 reaches a high temperature, and the sludge at the sludge feed pipe 5 will reach a molten or semi-molten state, with a high viscosity. The sludge feed pipe 5 is encased in a sludge water-cooling jacket 6, and the circulating water in the jacket removes most of the heat. Simultaneously, cooling air is blown into the gap between the sludge feed pipe 5 and the sludge feeding pipe 7, forming a cooling air ring. This cooling air ring circulates around the sludge feeding pipe 7 and disperses the sludge at the outlet of the sludge feed pipe 5, ensuring the sludge enters the incinerator 1 evenly for complete combustion. The water-cooled jacket and cooling air jets provide dual cooling for the sludge feed pipe 7, preventing the sludge from reaching a molten or semi-molten state at the feed inlet. This ensures that the sludge in this state receives sufficient cooling before reaching the outlet of the sludge feed pipe 5, preventing it from solidifying and avoiding high-temperature blockage at the sludge feed inlet. Ultimately, this ensures the sludge is smoothly transported into the incineration system. The pulverized coal or bed material required by the incinerator is fed to the incinerator from the auxiliary feed pipe 11 via a screw feeder.

[0036] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0037] Example:

[0038] A sludge incineration system for preventing sludge blockage during high-temperature feeding includes a fluidized bed incinerator 1, a flue gas cooler 2, a bag filter 3, and a chimney 4 connected in sequence. A sludge feed pipe 5 is located at the top of the incinerator 1, and a sludge water-cooled jacket 6 is fitted over the sludge feed pipe 5. A sludge feed pipe 7 is inserted inside the sludge feed pipe 5, and the sludge feed pipe 7 is connected to a raw material pump 15. The sludge feed pipe 5 and the sludge feed pipe 7 are connected by a flange 8. Multiple interconnected vent holes 9 are provided inside both the flange 8 and the sludge feed pipe 5, and the vent holes 9 are inclined at 15° towards the inner wall of the sludge feed pipe 5 from the flange 8. The vent holes 9 are connected to a cooling air duct 10 via a pipe joint 13 connected to the flange 8.

[0039] Compressed air introduced through cooling duct 10 is blown into the annular gap between sludge feed pipe 5 and sludge feed pipe 7. The width of the annular gap between sludge feed pipe 5 and sludge feed pipe 7 is 2mm. An auxiliary material feed pipe 11 is provided on the side of the incinerator 1, and an auxiliary material water cooling jacket 12 is fitted over the auxiliary material feed pipe 11. A screw feeder 14 is provided inside the auxiliary material feed pipe 11.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and basic spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sludge incineration system for preventing sludge blockage during high-temperature feeding, characterized in that, The incinerator comprises, in sequence, an incinerator, a flue gas cooler, a bag dust collector and a chimney, the top of the incinerator is provided with a sludge feeding pipe, the outside of the sludge feeding pipe is sleeved with a sludge water cooling jacket, a sludge feeding pipe is inserted into the sludge feeding pipe, the sludge feeding pipe and the sludge feeding pipe are connected through flanges, the flanges and the inside of the sludge feeding pipe are provided with a plurality of communicating air holes, the outer ends of the air holes are connected with a cooling air pipe, the cooling air pipe blows cooling air into the annular gap between the sludge feeding pipe and the sludge feeding pipe, the side of the incinerator is provided with an auxiliary material feeding pipe, the outside of the auxiliary material feeding pipe is sleeved with an auxiliary material water cooling jacket.

2. The sludge incineration system according to claim 1, wherein The incinerator is a fluidized bed incinerator.

3. The sludge incineration system according to claim 1, wherein The air holes are obliquely arranged from the flanges to the inner pipe wall of the sludge feeding pipe.

4. The sludge incineration system according to claim 1, wherein The air holes are connected with the cooling air pipe through the pipe joints connected with the flanges.

5. The sludge incineration system according to claim 1, wherein The annular gap between the sludge feeding pipe and the sludge feeding pipe has a width of 2-5 mm.

6. The sludge incineration system according to claim 1, wherein The sludge feeding pipe is connected with a raw material pump.

7. The sludge incineration system according to claim 1, wherein The auxiliary material feeding pipe is provided with a screw feeder. The auxiliary material feeding pipe is provided with a screw feeder.

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