Garbage incinerator for low-nitrogen transformation
By adopting the grading and distribution technology of flue gas recirculation and primary air in the waste incinerator, low nitrogen combustion is achieved, and the problems of high NOx emissions and high cost in the existing technology are solved, and the effects of low cost and low nitrogen emissions are achieved.
Patent Information
- Application Number
- CN202421399705.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-19
AI Technical Summary
Existing waste incinerators have high costs and serious ammonia escape in reducing nitrogen oxide (NOx) emissions, and it is difficult to meet the strict standards for low nitrogen emissions.
A waste incinerator for low nitrogen transformation is adopted. Through flue gas recirculation and primary air grading and distribution of air, the combustion of the main furnace arch area of the incinerator is divided into two stages to inhibit NOx generation.
It effectively reduces the initial NOx emission content from 300 to 400 mg/m3 to 100 mg/m3, reducing the nitrogen oxide compounds generated by combustion, and reducing the input equipment and operating costs.
Smart Images
Figure CN222783521U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of garbage incineration, in particular to a garbage incinerator for low-nitrogen transformation. Background Art
[0002] The "Standard for Pollution Control of Municipal Waste Incineration" has raised the emission control requirements for particulate matter, sulfur oxides, nitrogen oxides, heavy metals and their compounds, dioxins and other pollutants in the flue gas emitted by waste incineration plants, including nitrogen oxides (NOx) (mg / m 3 ) requires 1-hour average, limit 300; 24-hour average, present value 250;
[0003] With the development of society, it is necessary to continuously improve the environmental quality. The one-hour average emission limit of nitrogen oxides is required to be 80mg / m 3 Therefore, the deep reduction of nitrogen oxides in waste incinerators will become inevitable;
[0004] The mainstream flue gas denitrification technologies on the market at present are SNCR, SCR, SNCR+SCR, SNCR+PNCR, etc. The above technologies are all end-of-pipe treatment technologies. If SNCR or SNCR+PNCR technology is used, NOx can be reduced to a certain extent. The cost is excessive injection of ammonia water, resulting in serious excess of ammonia escape. If SCR or SNCR+SCR technology is used, NOx emission indicators can be met and ammonia escape can be controlled. The disadvantage is high construction and operation costs. Utility Model Content
[0005] In order to solve the above-mentioned problems, the purpose of the utility model is to provide a garbage incinerator for low-nitrogen transformation.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a garbage incinerator for low-nitrogen transformation, comprising an incinerator main body, a deacidification tower, a dust removal device, a chimney, a smoke exhaust pipeline and a smoke inlet pipeline, a draft fan is arranged on one side of the chimney, the incinerator main body is connected with the deacidification tower, the dust removal device, the draft fan and the chimney through the smoke exhaust pipeline, a circulating flue gas dust collector, a flue gas recirculation fan, a flue gas mixer and an introduction pipeline are respectively arranged on one side of the incinerator main body, one end of the smoke exhaust pipeline is connected with one end of the introduction pipeline, and the circulating flue gas dust collector, the flue gas recirculation fan and the smoke gas mixer are connected with the bottom of the incinerator main body through the introduction pipeline.
[0007] Preferably, a primary fan and a pre-evaporator are respectively provided on the other side of the incinerator body, and the primary fan and the pre-evaporator are connected to the flue gas mixer through a smoke inlet pipeline.
[0008] Preferably, four first valves are installed on the smoke inlet pipeline.
[0009] Preferably, four second valves are installed on the inlet pipeline.
[0010] Preferably, an oxygen analyzer is provided at one end of the inlet pipe close to the incinerator body.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. In the utility model, the combustion in the furnace arch area of the incinerator body 1 is divided into two stages through flue gas recirculation and graded primary air distribution, so as to achieve low nitrogen combustion and reduce the initial NOx emission content to 300-400 mg / m 3 Reduce to 100 mg / m 3 , and effectively reduce the nitrogen oxides produced by combustion;
[0013] 2. In the utility model, the equipment is invested once, the investment cost is low, there is no subsequent operating cost, the number of equipment invested is small, the subsequent maintenance cost is reduced, the operation is simple, the indicators are stable, and the NOx reduction range is large. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 The utility model is a schematic diagram of the structural composition of a garbage incinerator used for low-nitrogen transformation.
[0016] In the figure: 1. Incinerator body; 2. Deacidification tower; 3. Dust removal equipment; 4. Induced draft fan; 5. Primary fan; 6. Pre-steamer; 7. Circulating flue gas dust collector; 8. Flue gas recirculation fan; 9. Flue gas mixer; 10. Chimney; 20. Smoke exhaust pipe; 30. Smoke inlet pipe; 31. First valve; 40. Inlet pipe; 41. Second valve. DETAILED DESCRIPTION
[0017] 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 without creative work are within the scope of protection of the utility model.
[0018] Example: Figure 1As shown, the utility model provides a garbage incinerator for low-nitrogen transformation, including an incinerator body 1, a deacidification tower 2, a dust removal device 3, a chimney 10, a smoke exhaust pipeline 20 and a smoke inlet pipeline 30. A draft fan 4 is arranged on one side of the chimney 10. The incinerator body 1 is connected with the deacidification tower 2, the dust removal device 3, the draft fan 4 and the chimney 10 through the smoke exhaust pipeline 20. A circulating flue gas dust collector 7, a flue gas recirculation fan 8, a flue gas mixer 9 and an introduction pipeline 40 are respectively arranged on one side of the incinerator body 1. One end of the smoke exhaust pipeline 20 is connected to one end of the introduction pipeline 40, and the circulating flue gas dust collector 7, the flue gas recirculation fan 8, and the flue gas mixer 9 are connected to the bottom of the incinerator body 1 through the introduction pipeline 40.
[0019] A primary fan 5 and a pre-evaporator 6 are respectively disposed on the other side of the incinerator body 1 . The primary fan 5 and the pre-evaporator 6 are connected to the flue gas mixer 9 through a smoke inlet pipeline 30 .
[0020] Four first valves 31 are mounted on the smoke inlet pipeline 30 .
[0021] Four second valves 41 are mounted on the inlet pipe 40 .
[0022] An oxygen analyzer is provided at one end of the inlet pipe 40 close to the incinerator body 1 .
[0023] Working principle: by connecting the exhaust pipe 20 to the introduction pipe 40, and setting the circulating flue gas dust collector 7, the flue gas recirculation fan 8 and the flue gas mixer 9 on the introduction pipe 40, part of the high-temperature flue gas in front of the deacidification tower 2 is extracted, and after passing through the circulating flue gas dust collector 7, the flue gas recirculation fan 8 and the flue gas mixer 9, it is mixed and sent to the grate of the incinerator body 1, and the valve is interlocked through the oxygen analyzer, and the combustion is controlled by adjusting the oxygen content;
[0024] Through flue gas recirculation and graded distribution of primary air, the combustion in the furnace arch area of the incinerator body 1 is divided into two stages. The first stage forms "oxygen-deficient" combustion on the grate to suppress the generation of NOx in the fuel. The second stage introduces primary air through the primary fan 5 at the upper part of the combustion section to fully burn the fixed carbon and other combustibles, while cooling and disturbing the flame center, eliminating local high temperature and suppressing the generation of thermal NOx. Through low-nitrogen combustion, the initial NOx emission content can be reduced to 300-400mg / m 3 Reduce to 100 mg / m 3 , thereby achieving low-nitrogen combustion and effectively reducing the nitrogen oxides produced by combustion.
[0025] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A waste incinerator for low-nitrogen transformation, comprising an incinerator body (1), a deacidification tower (2), a dust removal device (3), a chimney (10), a smoke exhaust pipeline (20) and a smoke inlet pipeline (30), characterized in that: An induced draft fan (4) is arranged on one side of the chimney (10); the incinerator body (1) is connected to the deacidification tower (2), the dust removal equipment (3), the induced draft fan (4) and the chimney (10) through a smoke exhaust pipeline (20); a circulating flue gas dust collector (7), a smoke recirculation fan (8), a smoke mixer (9) and an introduction pipeline (40) are arranged on one side of the incinerator body (1); one end of the smoke exhaust pipeline (20) is connected to one end of the introduction pipeline (40); and the circulating flue gas dust collector (7), the smoke recirculation fan (8) and the smoke mixer (9) are connected to the bottom of the incinerator body (1) through the introduction pipeline (40).
2. A waste incinerator for low nitrogen transformation as claimed in claim 1, characterized in that: A primary fan (5) and a pre-evaporator (6) are respectively arranged on the other side of the incinerator body (1); the primary fan (5) and the pre-evaporator (6) are connected to a flue gas mixer (9) via a smoke inlet pipeline (30).
3. A waste incinerator for low nitrogen transformation as claimed in claim 2, characterized in that: Four first valves (31) are installed on the smoke inlet pipeline (30).
4. A waste incinerator for low nitrogen transformation as claimed in claim 1, characterized in that: The inlet pipeline (40) is equipped with four second valves (41).
5. A waste incinerator for low nitrogen transformation as claimed in claim 1, characterized in that: An oxygen analyzer is arranged at one end of the introduction pipe (40) close to the incinerator body (1).