Glass fiber waste gas two-stage waste heat recovery and sodium-based calcium-based desulfurization treatment system
Through the two-stage waste heat recovery of glass fiber waste gas and the sodium-based calcium-based desulfurization treatment system, the problems of increased fan load and high treatment cost in the waste gas treatment of traditional glass fiber kilns are solved, and ultra-low emissions of waste gas and efficient utilization of resources are achieved.
Patent Information
- Application Number
- CN202422561668.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In traditional glass fiber kiln waste gas treatment technology, flue gas cooling method increases the fan load, resulting in waste of water and electricity, high treatment costs, and difficult to achieve ultra-low emissions.
The two-stage waste heat recovery and sodium-based calcium-based desulfurization treatment system are adopted for glass fiber waste gas, including a first-stage fire-tube boiler, desulfurization tower, cyclone dust collector, dust-nitrification integrated device, a second-stage heat-tube boiler and bag dust collector. The waste heat recovery and efficient desulfurization and denitrification are achieved through multi-stage treatment, and harmful components are removed by catalysts and chemical reactions.
It achieves ultra-low emissions of waste gas, reduces fan load and management costs, maximizes resource utilization, avoids waste of water and electricity, and meets environmental protection standards.
Smart Images
Figure CN223243344U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass fiber waste gas treatment, and in particular to a two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber waste gas. Background Art
[0002] Glass fiber is an inorganic, non-metallic material with excellent properties and comes in a wide variety. Its advantages include excellent insulation, strong heat resistance, excellent corrosion resistance, and high mechanical strength. During the production process, glass fiber kilns generate exhaust gases containing harmful components such as SO2, NOx, and fluorides. To effectively manage these exhaust gases, the industry has adopted a variety of technologies and methods to ensure that emissions meet environmental standards.
[0003] In traditional fiberglass kiln exhaust gas treatment technology, the flue gas is cooled by spraying water or mixing it with cold air, which increases the fan load, causes waste of water and electricity, and increases the treatment cost. Utility Model Content
[0004] The purpose of the present invention is to provide a two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas to solve the problems raised in the above background technology.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0006] A two-stage waste heat recovery and sodium-based calcium-based desulfurization treatment system for glass fiber exhaust gas, the two-stage waste heat recovery and sodium-based calcium-based desulfurization treatment system for glass fiber exhaust gas includes a first-level fire-tube boiler, a desulfurization tower, a cyclone dust collector, a dust and salt integrated device, a second-level heat-tube boiler, a bag dust collector, a fan and a chimney, the air inlet end of the first-level fire-tube boiler is fixedly connected with a kiln flue gas output pipe, the exhaust pipe of the first-level fire-tube boiler is fixedly connected to the air inlet end of the desulfurization tower, the exhaust end of the desulfurization tower is fixedly connected to the air inlet end of the cyclone dust collector through a pipeline, the exhaust end of the cyclone dust collector is fixedly connected to the air inlet end of the dust and salt integrated device through a pipeline, the exhaust end of the dust and salt integrated device is fixedly connected to the air inlet end of the second-level heat-tube boiler through a pipeline, the exhaust pipe of the second-level heat-tube boiler is fixedly connected to the air inlet end of the bag dust collector, the exhaust end of the bag dust collector is fixedly connected to the input end of the fan through a pipeline, and the output end of the fan is fixedly connected to the air inlet of the chimney through a pipeline.
[0007] Preferably, a denitrification agent addition pipe is fixedly connected to the outer wall of the exhaust pipe of the first-stage fire-tube boiler, and a slaked lime addition pipe is fixedly connected to the side of the desulfurization tower.
[0008] Preferably, a slaked lime return pipe is fixedly connected to the bottom of the cyclone dust collector, and the end of the slaked lime return pipe away from the cyclone dust collector is fixedly connected to the side of the desulfurization tower, and a baking soda powder addition pipe is fixedly connected to the outer wall of the exhaust pipe of the secondary heat tube boiler.
[0009] Preferably, the first-stage fire tube boiler is used to cool the flue gas to a suitable denitrification temperature, and both the first-stage fire tube boiler and the second-stage heat tube boiler can output steam.
[0010] Preferably, a ceramic filter tube is provided inside the dust and saltpeter integrated device, and the interior of the ceramic filter tube is filled with a catalyst.
[0011] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:
[0012] 1. The utility model provides a two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas. Through the cooperation of the first-level fire tube boiler and the second-level heat tube boiler, the waste heat in the exhaust gas can be fully utilized, which can not only generate steam for plant use and maximize resource utilization, but also ensure that the temperature of each link meets the treatment process, so that the exhaust gas can meet the ultra-low emission standards after treatment, and at the same time ensure the normal operation of the glass fiber kiln, avoid the problem of increased fan load, reduce water and electricity waste, and reduce the cost of treatment.
[0013] 2. The utility model provides a two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas. The system adopts a fully dry desulfurization method, which does not produce sewage and can ensure a high desulfurization efficiency while meeting the requirements of whitening. It is completed by combining dust removal and denitrification in the same equipment, saving floor space.
[0014] 3. The utility model provides a two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber waste gas. The system adopts two-stage waste heat recovery, gives priority to the waste heat utilization of flue gas, and generates a large amount of steam, which not only improves the economic benefits, but also makes the entire treatment process not limited by excessively high waste gas temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural diagram of the management system of this utility model;
[0016] Figure 2 This is a schematic diagram of the distribution structure of the denitrification agent addition pipe, slaked lime addition pipe and slaked lime recycling pipe of the utility model;
[0017] Figure 3 This is a schematic diagram of the distribution position structure of the baking soda powder adding tube of the utility model.
[0018] In the figure: 1. First-stage fire tube boiler; 2. Desulfurization tower; 3. Cyclone dust collector; 4. Dust and nitrate integrated device; 5. Second-stage heat tube boiler; 6. Bag dust collector; 7. Fan; 8. Chimney; 11. Kiln flue gas outlet pipe; 12. Denitrification agent addition pipe; 13. Slaked lime addition pipe; 14. Slaked lime recycling pipe; 15. Baking soda powder addition pipe. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below with reference to the embodiments:
[0020] like Figure 1-Figure 3 As shown, the utility model provides a two-stage waste heat recovery and sodium-based calcium-based desulfurization treatment system for glass fiber waste gas, which includes a first-stage fire tube boiler 1, a desulfurization tower 2, a cyclone dust collector 3, a dust and salt integrated device 4, a second-stage heat tube boiler 5, a bag dust collector 6, a fan 7 and a chimney 8. The air inlet end of the first-stage fire tube boiler 1 is fixedly connected to a kiln flue gas output pipe 11, and the exhaust pipe of the first-stage fire tube boiler 1 is fixedly connected to the air inlet end of the desulfurization tower 2. The exhaust gas cooled in the first-stage fire-tube boiler 1 will enter the desulfurization tower 2. The flow rate in the desulfurization tower 2 is low, and the temperature of the flue gas entering it is high. The ammonia water can be well vaporized in it, avoiding the equipment from being blocked and preparing for subsequent denitrification. The slaked lime and the exhaust gas entering the equipment are mixed, contacted and chemically reacted with each other. Due to the action of the airflow, the gas and solid phases produce intense turbulence and mixing, so that the SO2 gas can be fully absorbed, achieving efficient pre-desulfurization, and laying a good foundation for subsequent deep desulfurization.
[0021] Furthermore, if Figure 1-Figure 3 As shown, the exhaust end of the desulfurization tower 2 is fixedly connected to the air inlet end of the cyclone dust collector 3 through a pipe, and the exhaust end of the cyclone dust collector 3 is fixedly connected to the air inlet end of the dust and nitrate integrated device 4 through a pipe. The exhaust gas output by the desulfurization tower 2 will pass through the cyclone dust collector 3 and enter the dust and nitrate integrated device 4. When the exhaust gas passes through the ceramic filter tube built into the device, the particulate matter is blocked and adsorbed on the surface of the ceramic filter tube. A certain amount of catalyst is configured inside the ceramic filter tube. When the exhaust gas enters the dust and nitrate integrated device 4, NOx reacts chemically with ammonia under the action of the catalyst, and the NOx in the exhaust gas is reduced to N2 and H2O. At the same time, the slaked lime attached to the surface of the filter tube can also remove part of the SO2 gas, thereby achieving efficient denitrification and dust removal and further pre-desulfurization, reducing the difficulty of subsequent desulfurization and dust removal.
[0022] Furthermore, if Figure 1-Figure 3As shown, the exhaust end of the dust and saltpeter integrated device 4 is fixedly connected to the air inlet end of the secondary heat pipe boiler 5 through a pipeline, the exhaust pipe of the secondary heat pipe boiler 5 is fixedly connected to the air inlet end of the bag dust collector 6, the exhaust end of the bag dust collector 6 is fixedly connected to the input end of the fan 7 through a pipeline, and the output end of the fan 7 is fixedly connected to the air inlet of the chimney 8 through a pipeline. The exhaust gas output by the dust and saltpeter integrated device 4 will enter the secondary heat pipe boiler 5 for waste heat recovery, which can generate a small amount of steam for use in the factory area and reduce the waste gas temperature to meet the desulfurization temperature of the subsequent bag dust collector 6. The waste gas after waste heat recovery enters the bag dust collector 6, and baking soda powder mixes with the waste gas entering the equipment, contacts and reacts chemically, so that S O2 gas can be fully absorbed to achieve efficient desulfurization. Due to the injection of baking soda powder, the concentration of SO2 in the exhaust gas is reduced to ultra-low. Subsequently, the waste deacidification agent after reaction absorption needs to be intercepted to meet the particulate matter emission requirements. The particulate matter in the exhaust gas is intercepted and adsorbed by the bags in the bag-type dust collector 6, so that the concentration of particulate matter in the exhaust gas is reduced to ultra-low. Since the previous process has been dust removed, the bag-type dust collector 6 only needs to remove the desulfurization agent Na injected later, and the dust removal load is greatly reduced. Since the secondary heat tube boiler 5 reduces the exhaust gas temperature, the bag-type dust collector 6 does not have the situation where the exhaust gas temperature is too high and the bags are damaged. The exhaust gas output by the bag-type dust collector 6 has met the ultra-low emission indicators of dust, nitrogen and sulfur, and is transported to the chimney 8 through the fan 7 for discharge.
[0023] Furthermore, if Figure 1-Figure 3As shown, a denitrification agent addition pipe 12 is fixedly connected to the outer wall of the exhaust pipe of the first-stage fire tube boiler 1, a slaked lime addition pipe 13 is fixedly connected to the side of the desulfurization tower 2, and a slaked lime return pipe 14 is fixedly connected to the bottom of the cyclone dust collector 3. The end of the slaked lime return pipe 14 away from the cyclone dust collector 3 is fixedly connected to the side of the desulfurization tower 2, and a baking soda powder addition pipe 15 is fixedly connected to the outer wall of the exhaust pipe of the second-stage heat tube boiler 5. The first-stage fire tube boiler 1 is used to cool the flue gas to a suitable denitrification temperature. The first-stage fire tube boiler 1 and the second-stage heat tube boiler 5 can both output steam. A ceramic filter tube is arranged inside the dust and salt integrated device 4, and the interior of the ceramic filter tube is filled with a catalyst. The steam output by the first-stage fire tube boiler 1 and the second-stage heat tube boiler 5 is used for factory use. The dust and salt integrated device 4 is an online / offline cleaning, denitrification and dust removal integrated ceramic filter tube device, including a filter tube reactor, a spray cleaning system, an offline system, etc. The middle box and the upper box of the reactor adopt an independent chamber design, and each wall panel of the box They are all independently set up, and each box is independently insulated. The bag dust collector 6 is an online / offline integrated bag dust collector for cleaning, desulfurization and dust removal, including a bag dust collector box, a spray cleaning system, an offline system, etc. The dust and nitrate integrated device 4 and the bag dust collector 6 are each provided with an offline valve at the inlet and outlet of each chamber. Under normal circumstances, multiple chambers operate at the same time. When a chamber needs offline cleaning / maintenance, the offline valves at the inlet and outlet of the chamber are closed to isolate the chamber. This system has the effect of efficient denitrification and desulfurization, can effectively reduce the emission of nitrogen oxides, and can also effectively reduce the emission of sulfur dioxide. At the same time, it has a good dust removal effect, can remove a large amount of particulate matter, and reduce dust pollution in the atmosphere. At the same time, it can maximize the use of resources, can effectively utilize the waste heat in the high-temperature exhaust gas, greatly reduce resource waste, can adapt to a variety of combustion conditions and fuel types, has a wide range of applications, and has relatively low water consumption. It adopts mature technology, the system operation is highly stable, and can treat multiple pollutants at the same time to achieve integrated environmental protection management.
[0024] It should be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.
[0025] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas, characterized by: The two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas includes a first-level fire tube boiler, a desulfurization tower, a cyclone dust collector, a dust and saltpeter integrated device, a second-level heat tube boiler, a bag dust collector, a fan and a chimney. The air inlet end of the first-level fire tube boiler is fixedly connected with the kiln flue gas output pipe, the exhaust pipe of the first-level fire tube boiler is fixedly connected to the air inlet end of the desulfurization tower, the exhaust end of the desulfurization tower is fixedly connected to the air inlet end of the cyclone dust collector through a pipeline, the exhaust end of the cyclone dust collector is fixedly connected to the air inlet end of the dust and saltpeter integrated device through a pipeline, the exhaust end of the dust and saltpeter integrated device is fixedly connected to the air inlet end of the second-level heat tube boiler through a pipeline, the exhaust pipe of the second-level heat tube boiler is fixedly connected to the air inlet end of the bag dust collector, the exhaust end of the bag dust collector is fixedly connected to the input end of the fan through a pipeline, and the output end of the fan is fixedly connected to the air inlet of the chimney through a pipeline.
2. The two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas according to claim 1 is characterized by: A denitrification agent adding pipe is fixedly connected to the outer wall of the exhaust pipe of the first-stage fire tube boiler, and a slaked lime adding pipe is fixedly connected to the side of the desulfurization tower.
3. The two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas according to claim 1 is characterized by: A slaked lime recycling pipe is fixedly connected to the bottom of the cyclone dust collector, and one end of the slaked lime recycling pipe away from the cyclone dust collector is fixedly connected to the side of the desulfurization tower. A baking soda powder addition pipe is fixedly connected to the outer wall of the exhaust pipe of the two-stage heat tube boiler.
4. The two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas according to claim 1 is characterized by: The first-stage fire tube boiler is used to cool the flue gas to a suitable denitrification temperature, and both the first-stage fire tube boiler and the second-stage heat tube boiler can output steam.
5. The two-stage waste heat recovery and sodium-based and calcium-based desulfurization treatment system for glass fiber exhaust gas according to claim 1 is characterized by: A ceramic filter tube is provided inside the dust and saltpeter integrated device, and the interior of the ceramic filter tube is filled with a catalyst.