Household garbage pyrolysis energy-gathering type high-temperature feedback system

By designing a high-temperature feedback system for the thermal decomposition of domestic waste and utilizing multi-stage re-combustion chambers and high-temperature feedback pipelines, heat circulation and flue gas feedback are achieved, solving the problems of high-temperature recovery and nitrogen oxide generation, and improving the performance and efficiency of the pyrolysis furnace.

CN223375804UActive Publication Date: 2025-09-23SHAANXI JIUPU ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202422581950.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-24
Publication Date
2025-09-23
Estimated Expiration
2034-10-24

AI Technical Summary

Technical Problem

In the existing recycling of waste pyrolysis flue gas, the high temperature cannot be effectively fed back and recovered, and the traditional air introduction leads to a high amount of nitrogen oxides produced, affecting the performance and efficiency of the pyrolysis furnace.

Method used

A domestic waste pyrolysis energy-gathering high-temperature feedback system is designed. Through the first, second, and third energy-gathering high-temperature feedback pipelines, heat is recycled to the pyrolysis furnace, and the purified flue gas is fed back to the pyrolysis furnace to ensure temperature stability and reduce the generation of nitrogen oxides.

Benefits of technology

The stability of the temperature inside the pyrolysis furnace and the improvement of its performance are achieved, the utilization rate of thermal energy is increased, the operating cost is reduced, and the problem of nitrogen oxide generation is solved.

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Patent Text Reader

Abstract

The utility model discloses a household garbage pyrolysis energy-gathering type high-temperature feedback system which comprises a household garbage pool, a blanking machine, a pyrolyzing furnace, a multi-stage re-combustion chamber, a heat exchanger, deacidification and dust removal equipment, a chimney and an energy-gathering type high-temperature feedback pipeline which are communicated in sequence. The energy-gathered high-temperature feedback pipeline comprises a first energy-gathered high-temperature feedback pipeline connected among the household garbage pool, the heat exchanger and the pyrolyzing furnace, a second energy-gathered high-temperature feedback pipeline connected between the multi-stage re-combustion chamber and the pyrolyzing furnace, and a third energy-gathered high-temperature feedback pipeline connected between the chimney inlet and the pyrolyzing furnace; the multi-stage re-combustion chamber comprises a first-stage re-combustion chamber and a second-stage re-combustion chamber. The pyrolyzing furnace is reasonable in design, the temperature in the pyrolyzing furnace is ensured to be stable, the pyrolyzing performance of the pyrolyzing furnace is improved, and the problem that air is introduced into the pyrolyzing furnace traditionally, so that the yield of oxynitride is high is solved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of feedback cycles, and in particular relates to a domestic waste thermal decomposition and energy-gathering high-temperature feedback system. Background Art

[0002] Garbage pyrolysis and gasification technology not only achieves the harmlessness, reduction and resource utilization of garbage, but also effectively overcomes the pollution problems caused by open-air burning of garbage. Therefore, it has become a garbage treatment technology with considerable development prospects.

[0003] At present, in the process of recycling waste pyrolysis flue gas, fans are mainly used to supply oxygen to the re-combustion chamber. However, the high temperature carried by the flue gas cannot be fed back for recycling and reuse. Even if it is recycled, it is only used to heat water or air for industrial use through heat exchange, and is not fed back to the pyrolysis furnace for high-temperature gas reuse.

[0004] Therefore, a rationally designed domestic waste pyrolysis energy-gathering high-temperature feedback system is needed today. Through the first energy-gathering high-temperature feedback pipeline and the second energy-gathering high-temperature feedback pipeline, the heat is recycled to the pyrolysis furnace, and through the third energy-gathering feedback pipeline, the flue gas after terminal purification is fed back to the pyrolysis furnace, ensuring the temperature stability inside the pyrolysis furnace, improving the pyrolysis performance of the pyrolysis furnace, and solving the problem of high nitrogen oxide production caused by the traditional air intake into the pyrolysis furnace. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a domestic waste pyrolysis energy-gathering high-temperature feedback system in response to the above-mentioned deficiencies in the existing technology. The system has a reasonable design and can circulate heat back to the pyrolysis furnace through a first energy-gathering high-temperature feedback pipeline and a second energy-gathering high-temperature feedback pipeline, and can feed back the flue gas purified at the end to the pyrolysis furnace through a third energy-gathering feedback pipeline, thereby ensuring the temperature stability inside the pyrolysis furnace, improving the pyrolysis performance of the pyrolysis furnace, and solving the problem of high nitrogen oxide production caused by the traditional introduction of air into the pyrolysis furnace.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a domestic waste pyrolysis energy-gathering high-temperature feedback system, characterized by comprising a domestic waste pool, a feeder, a pyrolysis furnace, a multi-stage afterburning chamber, a heat exchanger, a deacidification and dust removal device, a chimney, and an energy-gathering high-temperature feedback pipeline connected in sequence;

[0007] The energy-concentrating high-temperature feedback pipeline includes a first energy-concentrating high-temperature feedback pipeline connected between the domestic garbage pool, the heat exchanger and the pyrolysis furnace, a second energy-concentrating high-temperature feedback pipeline connected between the multi-stage afterburning chamber and the pyrolysis furnace, and a third energy-concentrating high-temperature feedback pipeline connected between the chimney inlet and the pyrolysis furnace;

[0008] The multi-stage afterburning chamber includes a primary afterburning chamber connected to the upper outlet of the pyrolysis furnace side wall and a secondary afterburning chamber connected to the bottom of the primary afterburning chamber, and the top outlet of the secondary afterburning chamber is connected to the heat exchanger.

[0009] The above-mentioned domestic waste pyrolysis energy-gathering high-temperature feedback system is characterized in that: the first energy-gathering high-temperature feedback pipeline includes a first fan arranged on the outer wall of the pyrolysis furnace, a first air intake pipe connecting the domestic waste pool and the first fan inlet, a second air intake pipe connected to the first fan outlet and the cold end inlet of the heat exchanger, and a first feedback pipe connected between the cold end outlet of the heat exchanger and the pyrolysis furnace.

[0010] The above-mentioned domestic waste pyrolysis energy-gathering high-temperature feedback system is characterized in that: the second energy-gathering high-temperature feedback pipeline includes a second fan arranged on the outer wall of the pyrolysis furnace, a third air intake pipe connecting the domestic waste pool and the second fan inlet, front and rear branch pipes connected to the second fan outlet and the front and rear sides of the first-level re-combustion chamber, and a second feedback pipe connected between the top of the second-level re-combustion chamber and the pyrolysis furnace, and a high-temperature fan is provided on the second feedback pipe.

[0011] The above-mentioned domestic waste pyrolysis energy-gathering high-temperature feedback system is characterized in that the third energy-gathering feedback pipeline includes a third fan, a fourth air intake pipe connecting the chimney inlet and the third fan inlet, and a third feedback pipe connecting the third fan outlet and the pyrolysis furnace.

[0012] The above-mentioned domestic waste thermal decomposition energy-gathering high-temperature feedback system is characterized in that: a main fan is arranged between the deacidification and dust removal equipment and the chimney, a first conveying pipeline is arranged between the main fan and the deacidification and dust removal equipment, a second conveying pipeline is arranged between the main fan and the chimney, and the inlet of the fourth air intake pipe is connected to the second conveying pipeline.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The utility model uses the first energy-gathering high-temperature feedback pipeline and the second energy-gathering high-temperature feedback pipeline to circulate heat back to the pyrolysis furnace, thereby ensuring the temperature inside the pyrolysis furnace to be stable and improving the pyrolysis performance of the pyrolysis furnace.

[0015] 2. The utility model feeds back the flue gas with low nitrogen content after terminal purification to the pyrolysis furnace through the third energy-gathering feedback pipeline, solving the problem of high nitrogen oxide production caused by traditional air introduction into the pyrolysis furnace.

[0016] 3. The utility model realizes heat energy recycling through high temperature feedback, fully utilizes the heat energy in the process of domestic waste pyrolysis system, improves heat energy utilization rate and reduces operating costs.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 This is a structural diagram of the multi-stage afterburning chamber of the utility model.

[0020] Description of the accompanying drawings:

[0021] 1—domestic garbage pool; 2—first fan; 2-1—first air inlet duct;

[0022] 2-2—Second air inlet duct; 3—Unloading machine; 4—Second fan;

[0023] 4-1—third air inlet duct; 4-2—front and rear branch ducts; 5—multi-stage afterburner chamber;

[0024] 5-1—first stage afterburning chamber; 5-2—second stage afterburning chamber; 5-5—second feedback pipe;

[0025] 5-6—High-temperature fan; 6—Heat exchanger; 6-1—First feedback pipe;

[0026] 7—deacidification and dust removal equipment; 7-1—first transmission pipeline; 10—chimney;

[0027] 11—main fan; 11-1—second delivery pipeline; 12—third fan;

[0028] 12-1—Fourth air intake pipe; 12-2—Third feedback pipe; 13—Pyrolysis furnace. DETAILED DESCRIPTION

[0029] like Figures 1 to 2 As shown, the utility model includes a domestic garbage pool 1, a feeder 3, a pyrolysis furnace 13, a multi-stage afterburning chamber 5, a heat exchanger 6, a deacidification and dust removal device 7, a chimney 10, and an energy-concentrating high-temperature feedback pipeline connected in sequence;

[0030] The energy-concentrating high-temperature feedback pipeline includes a first energy-concentrating high-temperature feedback pipeline connected between the domestic waste pool 1, the heat exchanger 6 and the pyrolysis furnace 13, a second energy-concentrating high-temperature feedback pipeline connected between the multi-stage afterburning chamber 5 and the pyrolysis furnace 13, and a third energy-concentrating high-temperature feedback pipeline connected between the chimney 10 inlet and the pyrolysis furnace 13;

[0031] The multi-stage reburning chamber 5 includes a primary reburning chamber 5-1 connected to the upper outlet of the side wall of the pyrolysis furnace 13 and a secondary reburning chamber 5-2 connected to the bottom of the primary reburning chamber 5-1, and the top outlet of the secondary reburning chamber 5-2 is connected to the heat exchanger 6.

[0032] In this embodiment, the first energy-concentrating high-temperature feedback pipeline includes a first fan 2 arranged on the outer wall of the pyrolysis furnace 13, a first air intake pipe 2-1 connecting the domestic waste pool 1 and the inlet of the first fan 2, a second air intake pipe 2-2 connected to the outlet of the first fan 2 and the cold end inlet of the heat exchanger 6, and a first feedback pipe 6-1 connected between the cold end outlet of the heat exchanger 6 and the pyrolysis furnace 13.

[0033] In this embodiment, the second energy-concentrating high-temperature feedback pipeline includes a second fan 4 arranged on the outer wall of the pyrolysis furnace 13, a third air intake pipe 4-1 connecting the domestic waste pool 1 and the inlet of the second fan 4, and front and rear branch pipes 4-2 connected to the outlet of the second fan 4 and the front and rear sides of the first-level re-combustion chamber 5-1, and a second feedback pipe 5-5 connected between the top of the second-level re-combustion chamber 5-2 and the pyrolysis furnace 13. A high-temperature fan 5-6 is provided on the second feedback pipe 5-5.

[0034] In this embodiment, the third energy-concentrating feedback pipeline includes a third fan 12 , a fourth air intake pipe 12 - 1 connecting the chimney 10 inlet and the third fan 12 inlet, and a third feedback pipe 12 - 2 connecting the third fan 12 outlet and the pyrolysis furnace 13 .

[0035] In this embodiment, a main fan 11 is arranged between the deacidification and dust removal equipment 7 and the chimney 10, a first conveying pipeline 7-1 is arranged between the main fan 11 and the deacidification and dust removal equipment 7, a second conveying pipeline 11-1 is arranged between the main fan 11 and the chimney 10, and the inlet of the fourth air intake pipe 12-1 is connected to the second conveying pipeline 11-1.

[0036] In this embodiment, the top of the secondary recombustion chamber 5-2 is higher than the top of the primary recombustion chamber 5-1. By setting the primary recombustion chamber 5-1 and the secondary recombustion chamber 5-2, the multi-stage recombustion of flue gas is performed to fully burn the harmful gases discharged from the pyrolysis furnace 13, thereby achieving ultra-low emissions of harmful gases.

[0037] In this embodiment, the problem of excessive CO emissions due to the complex composition of domestic waste during pyrolysis / incineration is solved by the multi-stage recombustion chamber 5, thereby achieving stable and ultra-clean CO emissions.

[0038] In this embodiment, the multi-stage afterburning chamber 5 is a two-stage combustion structure, with a longer combustion path and a longer combustion time, thereby ensuring that the flue gas has sufficient combustion time.

[0039] In this embodiment, it should be noted that the heat exchanger 6 and the deacidification and dust removal equipment 7 can refer to conventional structures or devices in the art.

[0040] When the utility model is used, the first blower 2 takes gas from the domestic garbage pool 1 through the first air inlet pipe 2-1 and leads it to the heat exchanger 6 through the second air inlet pipe 2-2. Heat exchange is carried out in the heat exchanger 6, and the water vapor therein is removed by quenching. Then, the gas is led from the cold end outlet of the heat exchanger 6 through the first feedback pipe 6-1 to the bottom of the pyrolysis furnace 13 and enters the furnace, where oxygen is supplied by the primary air, and the flue gas is completely burned.

[0041] The second blower 4 takes gas from the domestic garbage pool 1 through the third air inlet pipe 4-1 and leads it to the front and rear sides of the first stage re-combustion chamber 5-1 in the multi-stage re-combustion chamber through the front and rear branch pipes 4-2, and then enters the multi-stage re-combustion chamber for secondary air oxygen supply;

[0042] Under the condition that the first fan 2 and the second fan 4 supply oxygen, a third fan 12 is added at the same time, which guides the flue gas between the main fan 11 and the chimney 10 through the fourth air inlet pipe 12-1 and the third feedback pipe 12-2 into the pyrolysis furnace 13 and enters the furnace to continue to replenish heat;

[0043] In addition, the high-temperature flue gas is led from the top of the secondary recombustion chamber 5-2 in the multi-stage recombustion chamber to the bottom of the grate of the pyrolysis furnace 13 through the high-temperature fan 5-6 and the second feedback pipe 5-5. The incoming hot gas provides additional heat to the furnace of the pyrolysis furnace 13. The high-temperature flue gas of 1000℃~1100℃ at the top outlet of the multi-stage recombustion chamber 5 is led to the pyrolysis furnace 13 to heat and dry the garbage, so as to achieve temperature stability in the pyrolysis furnace 13, thereby achieving the purpose of continuous and stable combustion in a cycle and stable and reliable pyrolysis.

[0044] To sum up, the utility model recycles heat to the pyrolysis furnace through the first energy-gathering high-temperature feedback pipeline and the second energy-gathering high-temperature feedback pipeline, and feeds back the flue gas purified at the end to the pyrolysis furnace through the third energy-gathering feedback pipeline, thereby ensuring the temperature stability inside the pyrolysis furnace, improving the pyrolysis performance of the pyrolysis furnace, and solving the problem of high nitrogen oxide production caused by the traditional introduction of air into the pyrolysis furnace.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A domestic waste thermal decomposition energy-gathering high-temperature feedback system, characterized by: It includes a domestic garbage pool (1), a feeder (3), a pyrolysis furnace (13), a multi-stage afterburning chamber (5), a heat exchanger (6), a deacidification and dust removal device (7), a chimney (10), and an energy-gathering high-temperature feedback pipeline connected in sequence; The energy-gathering high-temperature feedback pipeline includes a first energy-gathering high-temperature feedback pipeline connected between the domestic waste pool (1), the heat exchanger (6) and the pyrolysis furnace (13), a second energy-gathering high-temperature feedback pipeline connected between the multi-stage afterburning chamber (5) and the pyrolysis furnace (13), and a third energy-gathering high-temperature feedback pipeline connected between the chimney (10) inlet and the pyrolysis furnace (13); The multi-stage afterburning chamber (5) includes a first afterburning chamber (5-1) connected to the upper outlet of the side wall of the pyrolysis furnace (13) and a second afterburning chamber (5-2) connected to the bottom of the first afterburning chamber (5-1), and the top outlet of the second afterburning chamber (5-2) is connected to the heat exchanger (6); The first energy-concentrating high-temperature feedback pipeline comprises a first fan (2) arranged on the outer wall of the pyrolysis furnace (13), a first air intake pipe (2-1) connecting the domestic waste pool (1) and the inlet of the first fan (2), a second air intake pipe (2-2) connected between the outlet of the first fan (2) and the cold end inlet of the heat exchanger (6), and a first feedback pipe (6-1) connected between the cold end outlet of the heat exchanger (6) and the pyrolysis furnace (13); The second energy-concentrating high-temperature feedback pipeline includes a second fan (4) arranged on the outer wall of the pyrolysis furnace (13), a third air inlet pipe (4-1) connecting the domestic waste pool (1) and the inlet of the second fan (4), front and rear branch pipes (4-2) connected to the outlet of the second fan (4) and the front and rear sides of the first-stage afterburning chamber (5-1), and a second feedback pipe (5-5) connected between the top of the second-stage afterburning chamber (5-2) and the pyrolysis furnace (13), and a high-temperature fan (5-6) is arranged on the second feedback pipe (5-5); The third energy-concentrating feedback pipeline includes a third fan (12), a fourth air intake pipe (12-1) connecting the chimney (10) inlet and the third fan (12) inlet, and a third feedback pipe (12-2) connecting the third fan (12) outlet and the pyrolysis furnace (13).

2. A domestic waste thermal decomposition energy-gathering high-temperature feedback system according to claim 1, characterized in that: A main fan (11) is provided between the deacidification and dust removal equipment (7) and the chimney (10), a first conveying pipeline (7-1) is provided between the main fan (11) and the deacidification and dust removal equipment (7), a second conveying pipeline (11-1) is provided between the main fan (11) and the chimney (10), and an inlet of the fourth air inlet duct (12-1) is connected to the second conveying pipeline (11-1).