Slag drying device
By connecting the slag drying unit in series with the incineration system, utilizing the exhaust gas as an energy source, and combining it with dust removal and deacidification tower treatment, the stability and energy waste issues of the slag drying unit when using steam are solved, achieving a highly efficient and clean slag drying process.
Patent Information
- Application Number
- CN202423311732.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When existing slag drying equipment uses steam generated from waste heat boilers as energy, there are problems with the leakage of secondary hazardous waste during the transfer process, and the energy utilization is unstable, resulting in waste and unstable equipment operation.
The slag drying device is connected in series with the incineration system, using the exhaust gas generated during the incineration process as an energy source. Dust in the flue gas is filtered by a bag filter, and water vapor is recovered by a wet deacidification tower. Combined with insulation pipes and magnetic adsorption layers, heat loss is reduced, ensuring stable temperature and clean operation.
This achieves stable utilization of exhaust gas as an energy source, reduces energy consumption, decreases the generation of secondary hazardous waste, improves equipment operation stability and drying efficiency, and reduces water consumption in wet deacidification towers.
Smart Images
Figure CN223795675U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of incineration flue gas treatment technology, specifically a slag drying device. Background Technology
[0002] A slag drying device is used to remove moisture from slag. Slag is usually a byproduct of smelting, coal combustion, or other high-temperature processes. It contains a certain amount of moisture and must be dried before it can be further utilized or stored.
[0003] The slag drying process generally involves purchasing complete sets of equipment and using steam generated by the waste heat boiler as energy to dry the slag, or directly transferring the wet slag. These methods not only cause secondary hazardous waste to leak during the transfer process, but also result in unstable steam pressure, large temperature fluctuations, wasted energy, and a large amount of labor required.
[0004] Therefore, we propose a slag drying device to solve the problems mentioned above. Utility Model Content
[0005] The purpose of this utility model is to provide a slag drying device to solve the problem mentioned in the background art of using steam generated by waste heat boilers as energy to dry slag, which causes secondary hazardous waste to leak during the transfer process.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a slag drying device, including a slag dryer, a bag filter dust collector is installed on one side of the slag dryer, and a flue gas inlet pipe is installed on the side wall of the bag filter dust collector for entering the flue gas. The flue gas inlet pipe is used to connect to the incineration system. After the flue gas enters the bag filter dust collector, the bag filter dust can be filtered out of the flue gas. A guide pipe is also connected to one side of the slag dryer, and the other end of the guide pipe is connected to a wet desulfurization tower. The top of the wet desulfurization tower is connected to... The bag filter is equipped with an exhaust duct, the other end of which is connected to an exhaust fan. A duct is installed on one side of the bag filter, which is connected to the slag dryer. The filtered flue gas can enter the slag dryer through the duct. The temperature of the flue gas after passing through the bag filter is stable. A spare flue gas pipe is also connected to one side of the duct, and the other end of the spare flue gas pipe is connected to the exhaust duct. An exhaust gas pipe is connected to the top of the slag dryer. The exhaust gas pipe is used to draw the exhaust gas in the slag dryer into the wet deacidification tower, which can recover water vapor.
[0007] Preferably, the lower end of the slag dryer is fixedly installed with a support for support, the upper end of the slag dryer is provided with a feed pipe for feeding, and the interior of the slag dryer is equipped with a stirring structure for stirring the slag.
[0008] Preferably, the slag dryer also includes a detachable door panel, which is located at the lower end of the slag dryer. The slag dryer and the detachable door panel are rotatably connected, and opening the detachable door panel allows slag to be discharged from the slag dryer.
[0009] Preferably, the stirring structure includes a stirring motor mounted on the outer wall of the slag dryer and a rotating shaft connected to the output end of the stirring motor. The rotating shaft is located inside the slag dryer, and several stirring protrusions are evenly distributed on the outer side of the rotating shaft. When the stirring motor is started, it can drive the rotating shaft and the stirring protrusions to rotate, thereby stirring the slag.
[0010] Preferably, the bag filter includes an insulation pipe disposed on the outside of the duct and a magnetic adsorption layer disposed on the side wall of the insulation pipe. The inner side of the insulation pipe is provided with insulation cotton, which can play a role in heat preservation. There are two sets of insulation pipes. The whole composed of the two sets of insulation pipes can wrap the duct and achieve the function of heat preservation.
[0011] Preferably, the magnetic adsorption layer is coated on the side wall of the heat preservation pipe, and the two sets of magnetic adsorption layers are opposite magnets that can attract each other.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. By connecting the slag dryer, bag filter, flue gas inlet pipe, flue gas backup pipe, and wet desulfurization tower in series, the slag dryer is connected to the incineration system. This allows the exhaust gas generated during incineration to enter the slag dryer. The incineration exhaust gas serves as the energy source for the slag dryer, providing sufficient heat and stable temperature. Connecting the slag dryer after the bag filter ensures stable outlet flue gas temperature and maintains the cleanliness of the incineration flue gas, ensuring long-term stable operation of the equipment. The exhaust gas pipeline then draws the exhaust gas from the slag dryer into the wet desulfurization tower, enabling water vapor recovery. This reduces the amount of process water used in the wet desulfurization tower, ensures that no other waste is generated on-site, and maintains a slight negative pressure inside the equipment, accelerating slag drying efficiency.
[0014] 2. By using an insulation tube, a magnetic adsorption layer, and insulation cotton, the insulation tube is placed on the outside of the conduit, which can completely wrap the conduit and effectively reduce heat loss. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the slag dryer of this utility model;
[0017] Figure 3This is a three-dimensional structural diagram of the stirring structure of this utility model;
[0018] Figure 4 This is a three-dimensional structural diagram of the catheter of this utility model.
[0019] In the diagram: 1. Slag dryer; 11. Support; 12. Stirring structure; 121. Stirring motor; 122. Rotating shaft; 123. Stirring protrusion; 13. Feed pipe; 14. Removable door panel; 15. Air duct; 2. Bag filter; 21. Conduit; 22. Insulation pipe; 23. Magnetic adsorption layer; 24. Insulation cotton; 3. Flue gas inlet pipe; 4. Flue gas spare pipe; 5. Wet deacidification tower; 6. Exhaust duct; 7. Exhaust fan; 8. Waste gas pipeline. Detailed Implementation
[0020] 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.
[0021] Example 1: Please refer to Figures 1-4 A slag drying device includes a slag dryer 1, a bag filter 2 installed on one side of the slag dryer 1, and a flue gas inlet pipe 3 installed on the side wall of the bag filter 2 for entering the flue gas. The flue gas inlet pipe 3 is used to connect to the incineration system and can utilize the heat of the exhaust gas itself. After the flue gas enters the bag filter 2, the bag filter 2 can filter the dust in the flue gas. A guide pipe 15 is also connected to one side of the slag dryer 1. The other end of the guide pipe 15 is connected to a wet desulfurization tower 5. The top of the wet desulfurization tower 5 is connected to an induced draft pipe 6. The other end of the induced draft pipe 6 is connected to an induced draft fan 7. A duct 21 is installed on one side of the bag filter 2 and is connected to the slag dryer 1. After filtration... The flue gas can enter the slag dryer 1 through the duct 21. After passing through the bag filter 2, the temperature of the flue gas is stable. One side of the duct 21 is also connected to the flue gas backup pipe 4, and the other end of the flue gas backup pipe 4 is connected to the air duct 15. The flue gas backup pipe 4 effectively prevents the system from failing to operate normally due to the failure of the slag dryer 1. The top of the slag dryer 1 is connected to the exhaust gas pipe 8. The exhaust gas pipe 8 is used to draw the exhaust gas in the slag dryer 1 into the wet deacidification tower 5, which can recover water vapor. The exhaust gas pipe 8 is equipped with a real-time flow and negative pressure detection system to ensure that the slag dryer 1 is in a negative pressure collection state, avoid the overflow of exhaust gas during the disposal process, and switch and maintain the pipeline according to the flow and negative pressure.
[0022] The lower end of the slag dryer 1 is fixedly equipped with a support 11 for support, and the upper end of the slag dryer 1 is provided with a feed pipe 13 for feeding. The slag dryer 1 is equipped with a stirring structure 12 inside, which is used to stir the slag.
[0023] The slag dryer 1 also includes a detachable door panel 14, which is located at the lower end of the slag dryer 1. The slag dryer 1 and the detachable door panel 14 are rotatably connected. Opening the detachable door panel 14 allows slag to be discharged from the slag dryer 1.
[0024] The stirring structure 12 includes a stirring motor 121 mounted on the outer wall of the slag dryer 1 and a rotating shaft 122 connected to the output end of the stirring motor 121. The rotating shaft 122 is located inside the slag dryer 1, and a number of stirring protrusions 123 are evenly distributed on the outer side of the rotating shaft 122. When the stirring motor 121 is started, it can drive the rotating shaft 122 and the stirring protrusions 123 to rotate, thereby stirring the slag.
[0025] In this embodiment, the slag dryer 1 is connected in series with the incineration system, allowing the exhaust gas generated during incineration to enter the slag dryer 1. The exhaust gas serves as the energy source for the slag dryer 1, providing ample heat and stable temperature. This allows the slag dryer 1 to switch from using steam or electricity as its energy source to utilizing the inherent heat of the exhaust gas, reducing energy consumption. Connecting the slag dryer 1 after the bag filter 2 ensures stable outlet flue gas temperature and maintains the cleanliness of the incineration flue gas, ensuring long-term stable operation of the equipment. The high temperature after the bag filter 2... After passing through the slag dryer 1, the flue gas is effectively cooled, removing waste from the pre-cooling tower equipment and reducing process water consumption. When drying the slag, the stirring motor 121 is started, which drives the rotating shaft 122 and the stirring protrusion 123 to rotate, thus agitating the slag. Then, the exhaust gas pipeline 8 is used to draw the exhaust gas from the slag dryer 1 into the wet deacidification tower 5, which can recover water vapor. This not only reduces the amount of process water used in the wet deacidification tower 5, but also ensures that no other "three wastes" are generated on-site in the entire production process. It can also maintain a slight negative pressure inside the equipment and accelerate the slag drying efficiency.
[0026] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figure 4 The bag filter 2 includes an insulation pipe 22 disposed on the outside of the duct 21 and a magnetic adsorption layer 23 disposed on the side wall of the insulation pipe 22. The inner side of the insulation pipe 22 is provided with insulation cotton 24, which can play a role in heat preservation. There are two sets of insulation pipes 22. The whole of the two sets of insulation pipes 22 can wrap the duct 21, which can achieve the effect of heat preservation and reduce heat loss.
[0027] The magnetic adsorption layer 23 is coated on the side wall of the insulation pipe 22, and the two sets of magnetic adsorption layers 23 are opposite magnets that can attract each other and can be fixed with bolts.
[0028] In this embodiment: the heat insulation tube 22 is placed on the outside of the conduit 21, and the two sets of heat insulation tubes 22 can be attracted and fixed by the magnetic adsorption layer 23. Then, bolts are used to fix the heat insulation tube 22 on the outside of the conduit 21. At this time, the whole composed of the two sets of heat insulation tubes 22 can wrap the conduit 21, which can achieve the function of heat preservation, reduce heat loss, and the heat insulation cotton 24 can also play a heat preservation role.
[0029] Working principle: The slag dryer 1 is connected in series with the incineration system, allowing the exhaust gas generated during incineration to enter the slag dryer 1. The exhaust gas serves as the energy source for the slag dryer 1, providing ample heat and stable temperature. In this mode, the slag dryer 1 replaces the previously used steam or electricity with the inherent heat energy of the exhaust gas. Connecting the slag dryer 1 to the bag filter 2 ensures stable outlet flue gas temperature and maintains cleanliness of the incineration flue gas. Starting the stirring motor 121 drives the rotating shaft 1. The rotation of the 22 and the stirring protrusion 123 can agitate the slag. Then, the exhaust gas pipe 8 is used to draw the exhaust gas in the slag dryer 1 into the wet deacidification tower 5, which can recover water vapor. The insulation pipe 22 is placed on the outside of the conduit 21, and the two sets of insulation pipes 22 can be adsorbed and fixed by the magnetic adsorption layer 23. Then, the insulation pipes 22 are fixed on the outside of the conduit 21 by bolts. At this time, the whole formed by the two sets of insulation pipes 22 can wrap the conduit 21, which can achieve the function of heat preservation.
[0030] It should be noted that the working principle of the bag filter 2 is to filter dust-laden gas through filter bags, where dust is captured on the surface of the filter bags, and the purified gas is discharged from the inside of the filter bags. The working principle of the wet deacidification tower 5 is to absorb acidic gases in the waste gas using a liquid absorbent (usually an aqueous solution or an alkaline solution). This is not an innovative part of this application and is common knowledge. Those skilled in the art are capable of conceiving of the specific structure and layout.
[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A slag drying apparatus comprising a slag dryer (1), characterized in that: One side of the slag dryer (1) is provided with a bag-type dust collector (2), a flue gas inlet pipe (3) for flue gas entering is installed on the side wall of the bag-type dust collector (2), the flue gas inlet pipe (3) is used to be connected with the incineration system, after the flue gas enters the bag-type dust collector (2), the dust in the flue gas can be filtered by the bag-type dust collector (2), one side of the slag dryer (1) is also connected with a wind guide pipe (15), the other end of the wind guide pipe (15) is connected with a wet deacidification tower (5), the top end of the wet deacidification tower (5) is connected with an air duct (6), the other end of the air duct (6) is connected with an induced draft fan (7), one side of the bag-type dust collector (2) is provided with a duct (21), the duct (21) is connected with the slag dryer (1), one side of the duct (21) is also connected with a flue gas standby pipe (4), the other end of the flue gas standby pipe (4) is connected with the wind guide pipe (15), the top end of the slag dryer (1) is connected with a waste gas pipeline (8), the waste gas pipeline (8) is used to lead the waste gas in the slag dryer (1) into the wet deacidification tower (5).
2. A slag drying apparatus as claimed in claim 1, wherein: The lower end of the slag dryer (1) is fixedly installed with a support (11) for supporting, the upper end of the slag dryer (1) is provided with a feeding pipe (13) for feeding, and the inside of the slag dryer (1) is installed with a stirring structure (12).
3. A furnace slag drying apparatus as claimed in claim 2, wherein: The slag dryer (1) further comprises a detachable door plate (14), which is arranged at the lower end of the slag dryer (1), and the slag dryer (1) and the detachable door plate (14) are rotationally connected.
4. A slag drying apparatus as claimed in claim 3, wherein: The stirring structure (12) comprises a stirring motor (121) arranged on the outer wall of the slag dryer (1) and a rotating shaft (122) connected with the output end of the stirring motor (121), the rotating shaft (122) is arranged in the inside of the slag dryer (1), and a plurality of stirring protruding rods (123) are uniformly distributed on the outer side of the rotating shaft (122).
5. A slag drying apparatus as claimed in claim 4, wherein: The bag-type dust collector (2) comprises a heat preservation pipe (22) arranged on the outer side of the duct (21) and a magnetic adsorption layer (23) arranged on the side wall of the heat preservation pipe (22), the inner side of the heat preservation pipe (22) is provided with heat preservation cotton (24), the heat preservation cotton (24) can play a heat preservation role, the heat preservation pipe (22) is provided with two groups, and the whole formed by the two groups of heat preservation pipes (22) can wrap the duct (21).
6. A slag drying apparatus as claimed in claim 5, wherein: The magnetic adsorption layer (23) is coated on the side wall of the heat preservation pipe (22), and the two groups of magnetic adsorption layers (23) are opposite to each other.