High-temperature flue gas recycling structure of double-chamber furnace
By designing high -temperature flue gas recycling reuse structures and flue gas reuse components in the double -room furnace, the high temperature flue gas cycle back to the heating room, and combined with the burning of the mouth to combust. The problem has improved efficient waste aluminum use and combustion efficiency.
Patent Information
- Application Number
- CN202420257953.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The thermal energy utilization rate of high-temperature flue gas in existing dual-chamber furnaces is low, and the high-temperature thick smoke generated by the smelting of waste aluminum leads to air pollution.
Design a dual -chamber furnace high -temperature smoke recycling reuse structure, including heating room, feeding room, rotary kiln and smoke reuse components. Back to the heating room, combined with burn burning to improve the combustion efficiency and thermal energy utilization.
It greatly improves the thermal energy utilization rate of high temperature flue gas, reduces air pollution, and achieves the efficient reuse and combustion efficiency of waste aluminum.
Smart Images
Figure CN222393365U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-temperature flue gas recycling, in particular to a double-chamber furnace high-temperature flue gas circulation recycling structure. Background Art
[0002] The industry uses a double-chamber furnace to melt scrap aluminum and regenerate it into metallic aluminum, so as to achieve the recycling of scrap aluminum and improve economic benefits. The double-chamber furnace includes a heating chamber and a charging chamber, which are connected by an aluminum liquid circulation channel and a flue gas channel; scrap aluminum is added to the charging chamber, and high-temperature flue gas is generated by combustion in the heating chamber. A part of the high-temperature flue gas flows into the charging chamber through the flue gas channel to heat the scrap aluminum, and another part of the high-temperature flue gas heats the aluminum liquid in the aluminum liquid circulation channel. The heated aluminum liquid flows into the charging chamber through the aluminum liquid circulation channel to melt the scrap aluminum, so as to achieve the recycling of scrap aluminum.
[0003] However, the thermal energy utilization rate of high-temperature flue gas in conventional double-chamber furnaces is not high. Specifically, the high-temperature flue gas is directly discharged after heating the scrap aluminum and exchanging heat with the aluminum liquid, resulting in low thermal energy utilization rate of the high-temperature flue gas. In addition, the scrap aluminum in the charging chamber is melted after exchanging heat with the high-temperature flue gas and the aluminum liquid, which is easy to produce high-temperature dense smoke. The high-temperature dense smoke contains a variety of organic waste gases. If it is directly discharged with the high-temperature flue gas, it will cause air pollution.
[0004] In summary, a double-chamber furnace high-temperature flue gas recycling structure is urgently needed to solve the problems of low thermal energy utilization of high-temperature flue gas and high-temperature thick smoke pollution of the air caused by scrap aluminum smelting in the prior art. Utility Model Content
[0005] The utility model aims to provide a double-chamber furnace high-temperature flue gas recycling structure, and the specific technical scheme is as follows:
[0006] A double-chamber furnace high-temperature flue gas recycling structure comprises a heating chamber, a charging chamber, a rotary kiln and a flue gas recycling component; a flue gas channel is arranged on the heating chamber and is connected with the charging chamber through the flue gas channel; one end of the rotary kiln is a feeding port, and the other end is a discharging port, and the discharging port is connected with the feeding port of the charging chamber; a flue gas outlet is arranged at one end of the rotary kiln close to the feeding port; one end of the flue gas recycling component is connected with the flue gas outlet, and the other end is connected with the heating chamber.
[0007] Optionally, the flue gas recycling component includes a cyclone dust collector, an induced draft fan, a first pipeline, a second pipeline and a third pipeline; one end of the first pipeline is connected to the flue gas outlet of the rotary kiln, and the other end is connected to the first air inlet of the cyclone dust collector; one end of the second pipeline is connected to the first air outlet of the cyclone dust collector, and the other end is connected to the second air inlet of the induced draft fan; one end of the third pipeline is connected to the second air outlet of the induced draft fan, and the other end is connected to the heating chamber.
[0008] Optionally, the third pipeline is connected to the furnace of the heating chamber.
[0009] Optionally, a burner is provided on the heating chamber; and the third pipeline is connected to the burner.
[0010] Optionally, the number of the burners is at least two, a plurality of branch pipelines are arranged on the third pipeline, and the branch pipelines are connected to the burners in a one-to-one correspondence.
[0011] Optionally, the flue gas recycling component further includes a plurality of first flue gas flow regulating valves, which are arranged one by one on the first pipeline, the second pipeline and the third pipeline.
[0012] Optionally, the flue gas recycling component further includes a plurality of second flue gas flow regulating valves, which are arranged one by one on the branch pipeline.
[0013] Optionally, the aluminum liquid circulation channel is also arranged between the heating chamber and the feeding chamber, and the aluminum liquid circulation channel includes a first channel and a second channel; one end of the first channel is connected to the heating chamber, and the other end is connected to the feeding chamber; one end of the second channel is connected to the feeding chamber, and the other end is connected to the heating chamber.
[0014] Optionally, the rotary kiln is arranged to be inclined, and the feeding port is higher than the discharging port.
[0015] Optionally, the double-chamber furnace high-temperature flue gas recycling structure further includes a support member, one end of which is fixedly arranged, and the other end of which is connected to the rotary kiln.
[0016] The application of the technical solution of the utility model has at least the following beneficial effects:
[0017] (1) The utility model provides a double-chamber furnace high-temperature flue gas recycling structure, in which waste aluminum is added to the charging chamber through a rotary kiln, and high-temperature flue gas is generated by combustion in the heating chamber. A part of the high-temperature flue gas directly flows into the charging chamber through the flue gas channel to heat the waste aluminum, and another part of the high-temperature flue gas heats the aluminum liquid in the aluminum liquid circulation channel and then flows into the charging chamber through the flue gas channel. The heated aluminum liquid flows into the charging chamber through the aluminum liquid circulation channel to melt the waste aluminum; the high-temperature flue gas flows into the rotary kiln through the feed port of the charging chamber, and after preheating the waste aluminum in the rotary kiln, it flows out through the flue gas outlet; the outflowing high-temperature flue gas flows back to the heating chamber through the flue gas recycling component and is recycled, which greatly improves the thermal energy utilization rate of the high-temperature flue gas; at the same time, during the circulation process, the high-temperature flue gas can also carry the high-temperature thick smoke generated by the smelting of waste aluminum in the charging chamber to the heating chamber for re-combustion, thereby improving the combustion efficiency and completeness of combustion, thereby achieving the emission reduction effect.
[0018] (2) In the utility model, a burner is arranged on the heating chamber, and the third pipeline is connected to the burner, so as to facilitate the high-temperature flue gas to be directly introduced into the burner for combustion, thereby improving the combustion efficiency and the completeness of combustion, achieving the emission reduction effect on the one hand, and improving the utilization rate of the heat energy of the high-temperature flue gas on the other hand.
[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0021] Figure 1 This is a schematic diagram of a double-chamber furnace high-temperature flue gas recycling structure in Example 1 of the present utility model;
[0022] Figure 2 This is a schematic diagram of a double-chamber furnace high-temperature flue gas recycling structure in Example 2 of the present utility model;
[0023] Among them, 1. Heating chamber, 2. Feeding chamber, 3. Rotary kiln, 4. Flue gas recycling assembly, 4.1. Cyclone dust collector, 4.2. Induced draft fan, 4.3. First pipeline, 4.4. Second pipeline, 4.5. Third pipeline, 5. Flue gas channel, 6. Aluminum liquid circulation channel, 7. Support, 8. Burner;
[0024] exist Figure 1-Figure 2 The direction of the arrow in the figure indicates the direction of high-temperature flue gas flow. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.
[0026] Embodiment 1:
[0027] See also Figure 1A double-chamber furnace high-temperature flue gas recycling structure comprises a heating chamber 1, a feeding chamber 2, a rotary kiln 3 and a flue gas recycling component 4; a flue gas channel 5 is arranged on the heating chamber 1, and is connected with the feeding chamber 2 through the flue gas channel 5; one end of the rotary kiln 3 is a feeding port, and the other end is a discharging port, and the discharging port is connected with the feeding port of the feeding chamber 2; a flue gas outlet is arranged at one end of the rotary kiln 3 close to the feeding port; one end of the flue gas recycling component 4 is connected with the flue gas outlet, and the other end is connected with the heating chamber 1.
[0028] The flue gas recycling assembly 4 includes a cyclone dust collector 4.1, an induced draft fan 4.2, a first pipeline 4.3, a second pipeline 4.4 and a third pipeline 4.5; one end of the first pipeline 4.3 is connected to the flue gas outlet of the rotary kiln 3, and the other end is connected to the first air inlet of the cyclone dust collector 4.1; one end of the second pipeline 4.4 is connected to the first air outlet of the cyclone dust collector 4.1, and the other end is connected to the second air inlet of the induced draft fan 4.2; one end of the third pipeline 4.5 is connected to the second air outlet of the induced draft fan 4.2, and the other end is connected to the heating chamber 1. The cyclone dust collector 4.1 is used to purify the high-temperature flue gas; the induced draft fan 4.2 is used to accelerate the flow of high-temperature flue gas.
[0029] The third pipeline 4.5 is connected to the furnace of the heating chamber 1 to realize the recycling of high-temperature flue gas, which can achieve the emission reduction effect on the one hand and improve the thermal energy utilization rate of high-temperature flue gas on the other hand.
[0030] The flue gas recycling component 4 also includes three first flue gas flow regulating valves, which are arranged one by one on the first pipeline 4.3, the second pipeline 4.4 and the third pipeline 4.5, so as to facilitate the flow regulation of the high-temperature flue gas entering the first pipeline 4.3, the second pipeline 4.4 and the third pipeline 4.5, and avoid the influence of the unstable flow of high-temperature flue gas on the first pipeline 4.3, the second pipeline 4.4 and the third pipeline 4.5.
[0031] The aluminum liquid circulation channel 6 is also provided between the heating chamber 1 and the charging chamber 2. The aluminum liquid circulation channel 6 includes a first channel and a second channel. One end of the first channel is connected to the heating chamber 1, and the other end is connected to the charging chamber 2. One end of the second channel is connected to the charging chamber 2, and the other end is connected to the heating chamber 1. The aluminum liquid in the aluminum liquid circulation channel 6 is heated by the high-temperature flue gas, and then the aluminum scrap in the charging chamber 2 is heated and smelted through the aluminum liquid circulation channel 6.
[0032] The rotary kiln 3 is arranged tilted, and the feeding port is higher than the discharging port, so as to facilitate discharging.
[0033] The double-chamber furnace high-temperature flue gas recycling structure further includes a support member 7 , one end of which is fixedly arranged, and the other end of which is connected to the rotary kiln 3 for supporting the rotary kiln 3 .
[0034] A burner 8 is also provided on the heating chamber 1 for realizing high-temperature flue gas combustion. Flame-retardant air and natural gas are replenished in real time according to the combustion situation.
[0035] The operating principle of the double-chamber furnace high-temperature flue gas recycling structure is as follows:
[0036] Scrap aluminum is added to the charging chamber 2 through the rotary kiln 3, and high-temperature flue gas is generated by combustion in the heating chamber 1. A part of the high-temperature flue gas directly flows into the charging chamber 2 through the flue gas channel 5 to heat the scrap aluminum, and the other part of the high-temperature flue gas heats the aluminum liquid in the aluminum liquid circulation channel 6 and then flows into the charging chamber 2 through the flue gas channel 5. The heated aluminum liquid flows into the charging chamber 2 through the aluminum liquid circulation channel 6 to melt the scrap aluminum; the high-temperature flue gas flows into the rotary kiln 3 through the feed port of the charging chamber 2, and after preheating the scrap aluminum in the rotary kiln 3, it flows out through the flue gas outlet; the outflowing high-temperature flue gas flows back to the heating chamber 1 through the flue gas recycling component 4, and is recycled, which greatly improves the thermal energy utilization rate of the high-temperature flue gas; at the same time, during the circulation process, the high-temperature flue gas can also carry the high-temperature thick smoke generated by the smelting of scrap aluminum in the charging chamber 2 to the heating chamber 1 for re-combustion, thereby improving the combustion efficiency and complete combustion, thereby achieving the emission reduction effect.
[0037] Embodiment 2:
[0038] See also Figure 2 , which is different from Example 1, the third pipeline 4.5 is connected to the burner 8 on the heating chamber 1.
[0039] Specifically, the third pipeline 4.5 is connected to the burner 8, which is convenient for directly passing the high-temperature flue gas into the burner 8 for combustion, thereby improving the combustion efficiency and completeness of combustion, achieving emission reduction effects on the one hand, and improving the utilization rate of high-temperature flue gas heat energy on the other hand.
[0040] There are two burners 8, and two branch pipelines are arranged on the third pipeline 4.5, and the branch pipelines are connected to the burners 8 in a one-to-one correspondence. The flue gas recycling component 4 also includes two second flue gas flow regulating valves, which are arranged on the branch pipelines in a one-to-one correspondence, so as to facilitate the flow regulation of the high-temperature flue gas entering the burner 8 and avoid the influence of the unstable flow of the high-temperature flue gas on the burner 8.
[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A double-chamber furnace high-temperature flue gas recycling structure, characterized in that: The invention comprises a heating chamber (1), a feeding chamber (2), a rotary kiln (3) and a flue gas recycling assembly (4); a flue gas passage (5) is arranged on the heating chamber (1) and is connected to the feeding chamber (2) through the flue gas passage (5); one end of the rotary kiln (3) is a feeding port and the other end is a discharge port, the discharge port being connected to the feeding port of the feeding chamber (2); a flue gas outlet is arranged at one end of the rotary kiln (3) close to the feeding port; one end of the flue gas recycling assembly (4) is connected to the flue gas outlet and the other end is connected to the heating chamber (1).
2. The double-chamber furnace high-temperature flue gas recycling structure according to claim 1 is characterized in that: The flue gas recycling component (4) comprises a cyclone dust collector (4.1), an induced draft fan (4.2), a first pipeline (4.3), a second pipeline (4.4) and a third pipeline (4.5); one end of the first pipeline (4.3) is connected to the flue gas outlet of the rotary kiln (3), and the other end is connected to the first air inlet of the cyclone dust collector (4.1); one end of the second pipeline (4.4) is connected to the first air outlet of the cyclone dust collector (4.1), and the other end is connected to the second air inlet of the induced draft fan (4.2); one end of the third pipeline (4.5) is connected to the second air outlet of the induced draft fan (4.2), and the other end is connected to the heating chamber (1).
3. The double-chamber furnace high-temperature flue gas recycling structure according to claim 2 is characterized in that: The third pipeline (4.5) is in communication with the furnace of the heating chamber (1).
4. The double-chamber furnace high-temperature flue gas recycling structure according to claim 2 is characterized in that: A burner (8) is arranged on the heating chamber (1); and the third pipeline (4.5) is connected to the burner (8).
5. The double-chamber furnace high-temperature flue gas recycling structure according to claim 4 is characterized in that: The number of the burners (8) is at least two, and a plurality of branch pipelines are arranged on the third pipeline (4.5), and the branch pipelines are connected to the burners (8) in a one-to-one correspondence.
6. The double-chamber furnace high-temperature flue gas recycling structure according to claim 3 or 4, characterized in that: The flue gas recycling component (4) further comprises a plurality of first flue gas flow regulating valves, which are arranged one by one on the first pipeline (4.3), the second pipeline (4.4) and the third pipeline (4.5).
7. The double-chamber furnace high-temperature flue gas recycling structure according to claim 5 is characterized in that: The flue gas recycling component (4) further comprises a plurality of second flue gas flow regulating valves, which are arranged one by one on the branch pipeline.
8. The double-chamber furnace high-temperature flue gas recycling structure according to claim 7 is characterized in that: A molten aluminum circulation channel (6) is also provided between the heating chamber (1) and the feeding chamber (2), and the molten aluminum circulation channel (6) comprises a first channel and a second channel; one end of the first channel is connected to the heating chamber (1), and the other end is connected to the feeding chamber (2); one end of the second channel is connected to the feeding chamber (2), and the other end is connected to the heating chamber (1).
9. The double-chamber furnace high-temperature flue gas recycling structure according to claim 8 is characterized in that: The rotary kiln (3) is arranged to be inclined, and the feeding port is higher than the discharging port.
10. The double-chamber furnace high-temperature flue gas recycling structure according to claim 9 is characterized in that: It also comprises a support member (7), one end of which is fixedly arranged, and the other end of which is connected to the rotary kiln (3).