Environment-friendly and energy-saving flue gas recycling device
By collecting the oily fume generated during the melting of aluminum chips and burning it as combustion-supporting air, the problems of direct fume emission pollution and the flammability and oil accumulation of bag dust collectors are solved, achieving environmental protection and energy saving effects.
Patent Information
- Application Number
- CN202422081092.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the existing technology, the oily fume generated during the melting process of aluminum chips is directly discharged or discharged after dust removal by a water curtain, polluting the environment. The fume in the bag filter is flammable and prone to oil accumulation, causing fire risks and reducing the life of the filter bags.
The oily fume is collected and used as combustion air to enter the burner in the holding chamber for combustion. It is processed through cyclone dust removal and filters to reduce fan blockage and use the heat from oil combustion to increase combustion temperature and safety.
It realizes the environmentally friendly reuse of flue gas, avoids direct emission pollution, saves energy, reduces fire risks and extends the life of filter bags.
Smart Images
Figure CN223361116U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas waste heat recycling, in particular to an environmentally friendly and energy-saving flue gas recycling device. Background Art
[0002] After pre-treatment, aluminum chips are drawn into the high-temperature molten aluminum for melting in the vortex chamber. During this process, any remaining cutting fluid and oil adhering to the surface of the chips, which haven't been completely removed, evaporate under the high temperature, forming oily fumes. These gases are typically discharged directly, purified through a water curtain, or purified in a bag filter before discharge.
[0003] Direct emissions: Under the premise of increasingly stringent environmental protection requirements, direct emissions cannot meet environmental protection requirements and are not allowed.
[0004] Water curtain dust removal: The exhaust gas still contains dust, which will pollute the air. The wastewater generated requires special treatment, increasing production costs.
[0005] Bag filter: Flue gas containing volatile oils tends to adhere to the duct walls as it passes through the dust collector. Sparks in the flue gas can easily ignite, causing a fire. Furthermore, the oils can adhere to the filter bag surface, reducing its effectiveness and lifespan. Utility Model Content
[0006] In response to the shortcomings and deficiencies of the aforementioned prior art, the present invention provides an environmentally friendly and energy-saving flue gas recycling device to address the issues raised in the aforementioned background art. This device collects the oil-laden flue gas from the aluminum chip melting chamber and uses it as combustion air for the burners in the holding chamber, allowing the residual oil to be fully burned within the holding chamber. This not only addresses the environmental issue of oil not being able to be directly discharged, but also utilizes the heat generated by the oil combustion to achieve energy savings.
[0007] The purpose of this utility model is achieved through the following technical solutions:
[0008] The smoke generating device further comprises a smoke screen, wherein the smoke generating device further comprises a smoke screen, wherein the smoke generating device further comprises a smoke screen, wherein the smoke generating device further comprises a smoke screen, wherein the smoke generating device further comprises a smoke screen, wherein the smoke generating device further comprises a smoke screen, wherein the smoke
[0009] The beneficial effects of the utility model are:
[0010] This environmentally friendly and energy-saving flue gas recycling device routes flue gas containing oil volatilized during the aluminum chip melting process to the combustion-supporting blower in the combustion chamber's auxiliary burner. Cyclone dust removal and filter boxes are added to the pipe to reduce the chance of blower blockage. High-temperature flue gas raises the combustion air temperature, while the oil in the flue gas generates heat through combustion, helping to maintain the elevated chamber temperature and saving energy.
[0011] 2. This environmentally friendly and energy-saving flue gas recycling device burns the oil volatilized in the flue gas during the melting of aluminum chips by connecting it to a combustion device, preventing the oil from adhering to and accumulating on the flue pipe wall, avoiding fire risks and improving the safety of the equipment.
[0012] 3. This environmentally friendly and energy-saving flue gas recycling device burns the oil volatilized in the flue gas during the melting of aluminum chips by connecting it to a combustion device to obtain clean flue gas, thereby extending the life of the bag filter bag. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is the front view of the environmentally friendly and energy-saving flue gas recycling device.
[0014] Figure 2 This is an overhead view of the environmentally friendly and energy-saving flue gas recycling device. DETAILED DESCRIPTION
[0015] The specific implementation of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.
[0016] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.
[0017] In this embodiment, an environmentally friendly and energy-saving flue gas recycling device includes: an aluminum chip furnace 1, an aluminum chip melting chamber 2, a smoke exhaust hood 3 installed on the top of the aluminum chip melting chamber 2, the upper end of the smoke exhaust hood 3 is connected to one end of a first smoke exhaust pipe 4, smoke is sucked in through the smoke exhaust hood 3 and transmitted through the first smoke exhaust pipe 4. The first smoke exhaust pipe 4 is provided with a smoke exhaust regulating valve 5, the other end of the first smoke exhaust pipe 4 is connected to a cyclone dust collector 6, the top of the cyclone dust collector 6 is connected to one end of a second smoke exhaust pipe 7, after the smoke enters the cyclone dust collector 6 from the first smoke exhaust pipe 4, it is discharged from the connection port with the second smoke exhaust pipe 7, and after the smoke passes through the cyclone dust collector 6, the probability of fan blockage can be reduced. The other end of the second smoke exhaust pipe 7 is connected to the input end of the smoke filter 8, and the output end of the smoke filter 8 is connected to one end of the third smoke exhaust pipe 9. The third smoke exhaust pipe 9 is provided with a manual smoke butterfly valve 10. The other end of the third smoke exhaust pipe 9 is connected to the air suction port of the combustion-supporting fan 11. The air outlet of the combustion-supporting fan 11 is connected to one end of the combustion-supporting air pipe 12. The combustion-supporting air pipe 12 is provided with an air butterfly valve 13. The other end of the combustion-supporting air pipe 12 is connected to a retaining burner 14. The retaining burner 14 is connected to the aluminum chip furnace 1. The retaining burner 14 burns the smoke containing oil volatilized during the melting process of aluminum chips.
[0018] Experimental method: First, remove the filter screen of the circulation fan and connect the air intake of the combustion-supporting fan 11 to the cyclone dust collector 6. The combustion-supporting fan 11 is used to introduce the flue gas in the exhaust hood 3 into the holding burner 14 to participate in the combustion as combustion air.
[0019] Experimental results:
[0020] 1. Regardless of whether the burner is in the state of flameout, low fire or high fire, the oil smoke at the aluminum chip mouth can be sucked into the holding room for combustion, which can completely eliminate the pollution source.
[0021] 2. The inclusion of oil smoke in the combustion air reduces the oxygen content in the air. However, in practice, this reduction in oxygen concentration has minimal impact on combustion. Furthermore, based on pressure and other test data, this combustion mode theoretically reduces the heat load on the burner. By increasing the combustion air temperature and generating heat through the combustion of oil smoke in the air, it can theoretically achieve a certain energy saving effect.
[0022] 3. Analysis of flue gas composition from locations such as the flue: First, the oil smoke passing through the burner is completely eliminated. Excessive CO levels are primarily due to the burner and pressure equalizing valve failing to maintain a good air-fuel ratio when load is adjusted too low; at the same time, the furnace is over-producing, and the fan's supply capacity has reached its limit.
[0023] 4. The introduction of high-temperature flue gas will cause the temperature of the fan to rise. Long-term use will cause dust to accumulate inside the pipes and the fan, so a cyclone dust collector 6 is required for dust removal.
[0024] The utility model converts the smoke containing oil into fuel by connecting to a maintenance burner, thereby saving energy, avoiding the risk of the smoke containing oil in the flue, purifying the smoke, and extending the service life of the filter bag of the bag dust collector.
[0025] The above contents are merely examples of the present invention. The commonly known specific structures and features of the solutions are not described in detail here. It is readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Numerous variations and improvements may be made without departing from the present invention, and these variations and improvements should also be considered within the scope of protection of the present invention. These variations and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.
Claims
1. An environmentally friendly and energy-saving flue gas recycling device, comprising: An aluminum chip furnace (1) and an aluminum chip melting chamber (2) are characterized in that: a smoke exhaust hood (3) is installed on the top of the aluminum chip melting chamber (2); the upper end of the smoke exhaust hood (3) is connected to one end of a first smoke exhaust pipe (4); a smoke exhaust regulating valve (5) is provided on the first smoke exhaust pipe (4); the other end of the first smoke exhaust pipe (4) is connected to a cyclone dust collector (6); the top of the cyclone dust collector (6) is connected to one end of a second smoke exhaust pipe (7); after the smoke enters the cyclone dust collector (6) from the first smoke exhaust pipe (4), it is discharged from the connection port with the second smoke exhaust pipe (7); the other end of the second smoke exhaust pipe (7) is connected to the cyclone dust collector (6); The input end of the smoke filter (8) is connected to the output end of the smoke filter (8) and one end of the third smoke exhaust pipe (9). The third smoke exhaust pipe (9) is provided with a smoke manual butterfly valve (10). The other end of the third smoke exhaust pipe (9) is connected to the air intake of the combustion-supporting fan (11). The air outlet of the combustion-supporting fan (11) is connected to one end of the combustion-supporting air pipe (12). The combustion-supporting air pipe (12) is provided with an air butterfly valve (13). The other end of the combustion-supporting air pipe (12) is connected to a retaining burner (14). The retaining burner (14) is connected to the aluminum chip furnace (1).