Flue gas treatment system of papermaking garbage furnace

Abstract

The utility model relates to a flue gas treatment system of a papermaking garbage furnace, which comprises a hearth, a dense-phase zone is arranged in the hearth, and a first flue gas outlet is arranged on the upper portion of the hearth. The first denitration mechanism is arranged on the dense-phase region, and the first denitration mechanism is used for reducing and removing nitrogen oxides in the flue gas; the separation mechanism is connected with the first smoke outlet, the separation mechanism is used for separating solid particles in smoke, and a second smoke outlet is formed in the upper portion of the separation mechanism; the second denitration mechanism is arranged on the second smoke outlet, and the second denitration mechanism is used for reducing and removing the nitric oxide in the smoke again; the system comprises a first denitration mechanism, a second denitration mechanism and a feeding mechanism, the first denitration mechanism is connected with the feeding mechanism through a pipeline, the second denitration mechanism is connected with the feeding mechanism through a pipeline, and the feeding mechanism is used for providing denitration materials for the first denitration mechanism and the second denitration mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking smoke treatment, in particular to a smoke treatment system for a papermaking garbage furnace. Background Art

[0002] The garbage incinerator that burns papermaking waste residue has relatively high requirements for bed temperature, and the moisture content of light residue and waste residue quality have a greater impact on it; the moisture content of waste residue entering the furnace is generally 50-55%, which causes the furnace temperature to be relatively low during combustion. The waste residue is easy to clump during transportation, and it takes a long time to absorb heat and burn in the furnace. A lot of flue gas is generated during the combustion process, and the proportion of nitrogen oxides in the flue gas is high. If the flue gas is directly discharged to the outside, it will pollute the environment and is not conducive to environmental protection. Therefore, it is necessary to promptly and effectively deal with the technical problem of the high proportion of nitrogen oxides in the flue gas. Summary of the Invention

[0003] To this end, it is necessary to provide a flue gas treatment system for a papermaking waste furnace to solve the problem that the papermaking waste takes a long time to absorb heat and burn in the furnace, and a large amount of flue gas is generated during the combustion process. The proportion of nitrogen oxides in the flue gas is large. If the flue gas is directly discharged to the outside, it will pollute the environment and is not conducive to environmental protection. Therefore, it is necessary to promptly and effectively deal with the technical problem of the large proportion of nitrogen oxides in the flue gas.

[0004] To achieve the above objectives, the inventors provide a flue gas treatment system for a papermaking waste incinerator, comprising:

[0005] A furnace, wherein a dense phase zone is provided in the furnace, and a first smoke outlet is provided at an upper portion of the furnace;

[0006] a first denitrification mechanism, the first denitrification mechanism being disposed on the dense phase zone and being used to reduce and remove nitrogen oxides in the flue gas;

[0007] a separation mechanism connected to the first smoke outlet, the separation mechanism being used to separate solid particles from the smoke, and a second smoke outlet being provided on an upper portion of the separation mechanism;

[0008] a second denitrification mechanism, the second denitrification mechanism being disposed on the second smoke outlet and being used to further reduce and remove nitrogen oxides in the flue gas;

[0009] and a feeding mechanism, wherein the first denitrification mechanism is connected to the feeding mechanism via a pipeline, and the second denitrification mechanism is connected to the feeding mechanism via a pipeline, and the feeding mechanism is used to provide denitrification materials to the first denitrification mechanism and the second denitrification mechanism.

[0010] As a preferred structure of the present invention, the flue gas treatment system of the papermaking garbage incinerator further includes a control mechanism and a first temperature detection mechanism;

[0011] The first temperature detection mechanism is provided on the dense phase zone, and is used to detect the temperature of the dense phase zone;

[0012] The first temperature detection mechanism is electrically connected to the control mechanism, and the feeding mechanism is electrically connected to the control mechanism. The control mechanism is used to receive the detection signal of the first temperature detection mechanism and control the feeding mechanism to provide denitration material to the first denitration mechanism.

[0013] As a preferred structure of the present invention, the flue gas treatment system of the papermaking garbage incinerator further includes a second temperature detection mechanism;

[0014] The second temperature detection mechanism is provided on the second smoke outlet, and is used to detect the temperature of the second smoke outlet;

[0015] The second temperature detection mechanism is electrically connected to the control mechanism, and the control mechanism is further used to receive the detection signal of the second temperature detection mechanism and control the feeding mechanism to provide denitration material to the first denitration mechanism and / or the second denitration mechanism.

[0016] As a preferred structure of the present invention, the height of the dense phase zone is 6000-6600 mm.

[0017] As a preferred structure of the present invention, the flue gas treatment system of the papermaking garbage furnace also includes a returner and a return pipe. The returner is arranged below the separation mechanism, the returner is connected to the separation mechanism, and the returner is connected to the furnace through the return pipe.

[0018] As a preferred structure of the present invention, a plurality of return air hoods are provided in the return device, and the aperture of the return air hood is 2.3-2.6 mm.

[0019] As a preferred structure of the present invention, the first denitrification mechanism includes a plurality of first denitrification ammonia guns, and the plurality of first denitrification ammonia guns are respectively arranged on both sides of the dense phase zone;

[0020] The second denitration mechanism includes a plurality of second denitration ammonia guns, and the plurality of second denitration ammonia guns are respectively arranged on both sides of the second smoke outlet.

[0021] As a preferred structure of the present invention, the feeding mechanism includes a urea solution storage tank, a first water pump, a desalted water storage tank, a dilution water pump, a mixer, a first delivery pipeline, a second delivery pipeline, a third delivery pipeline, a fourth delivery pipeline and an air supply component;

[0022] The urea solution storage tank is connected to the mixer via a pipeline, and the first water pump is provided on the pipeline between the urea solution storage tank and the mixer;

[0023] The desalted water storage tank is connected to the mixer via a pipeline, and the dilution water pump is provided on the pipeline between the desalted water storage tank and the mixer;

[0024] The mixer is connected to the first denitrification mechanism via the first delivery pipeline;

[0025] The mixer is connected to the second denitrification mechanism via the second delivery pipeline;

[0026] The gas supply component is connected to the first denitration mechanism via the third delivery pipeline;

[0027] The gas supply component is connected to the second denitration mechanism through the fourth delivery pipeline.

[0028] As a preferred structure of the present invention, the feeding mechanism further includes a first control switch, a second control switch, a third control switch and a fourth control switch;

[0029] The first control switch is provided on the first delivery pipeline, and the first control switch is electrically connected to the control mechanism;

[0030] The second control switch is provided on the second delivery pipeline, and the second control switch is electrically connected to the control mechanism;

[0031] The third control switch is provided on the third delivery pipeline, and the third control switch is electrically connected to the control mechanism;

[0032] The fourth control switch is disposed on the fourth conveying pipeline, and the fourth control switch is electrically connected to the control mechanism.

[0033] As a preferred structure of the present invention, the flue gas treatment system of the papermaking garbage incinerator further includes a desulfurization tower, an induced draft fan and a chimney;

[0034] The desulfurization tower is connected to the second smoke outlet via a pipeline, and the desulfurization tower is used to remove sulfur dioxide from the flue gas;

[0035] The desulfurization tower is connected to the chimney through a pipeline, and the induced draft fan is arranged on the pipeline between the desulfurization tower and the chimney.

[0036] Different from the existing technology, the beneficial effects of the above technical solution are as follows: the flue gas treatment system of the papermaking garbage furnace of the utility model provides denitrification materials to the first denitrification mechanism and the second denitrification mechanism through the feeding mechanism during operation. Since there is a certain amount of moisture when the waste slag enters the furnace, the furnace temperature is relatively low during combustion, the combustion time is relatively long, and more flue gas is generated during the combustion process. At this time, the first denitrification mechanism in the dense phase area of ​​the furnace first treats the nitrogen oxides in the generated flue gas to reduce and remove the nitrogen oxides in the flue gas to avoid insufficient subsequent treatment of the nitrogen oxides; then the nitrogen oxides in the flue gas are treated again by the second denitrification mechanism through the second smoke outlet to effectively reduce and remove the proportion of nitrogen oxides in the flue gas to ensure that the flue gas emissions meet environmental protection requirements, avoid environmental pollution, and improve environmental protection.

[0037] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0039] In the drawings of the specification:

[0040] Figure 1 This is one of the flow diagrams of the flue gas treatment system of the papermaking garbage incinerator described in the specific embodiment;

[0041] Figure 2 This is the second flow diagram of the flue gas treatment system of the papermaking garbage incinerator described in the specific embodiment;

[0042] Figure 3 This is the third flow diagram of the flue gas treatment system of the papermaking garbage incinerator described in the specific embodiment;

[0043] Figure 4 This is a schematic diagram of the feeding process of the flue gas treatment system of the papermaking garbage incinerator according to the specific embodiment;

[0044] Figure 5 This is a circuit connection diagram of the flue gas treatment system of the papermaking garbage furnace described in the specific embodiment. The reference numerals in the above figures are explained as follows: 1. Furnace,

[0045] 11. Dense phase area,

[0046] 12. First smoke outlet,

[0047] 2. The first denitrification mechanism,

[0048] 21. The first denitrification ammonia gun,

[0049] 3. Separation mechanism,

[0050] 31. Second smoke outlet,

[0051] 32. Return device,

[0052] 33. Return pipe,

[0053] 34. Return material hood,

[0054] 4. Feeding mechanism,

[0055] 41. Urea solution storage tank,

[0056] 42. First water pump,

[0057] 43. Desalted water storage tank,

[0058] 44. Dilution water pump,

[0059] 45. Mixer,

[0060] 46. ​​Air supply components,

[0061] 47. The first delivery pipeline,

[0062] 471, the second delivery pipeline,

[0063] 472, the third delivery pipeline,

[0064] 48. The fourth delivery pipeline,

[0065] 49. First control switch,

[0066] 491, second control switch,

[0067] 492. The third control switch,

[0068] 493. Fourth control switch,

[0069] 5. The second denitrification mechanism,

[0070] 51. The first denitrification ammonia gun,

[0071] 6. Control mechanism,

[0072] 7. The first temperature detection mechanism,

[0073] 8. Second temperature detection mechanism,

[0074] 9. Desulfurization tower,

[0075] 10. Chimney,

[0076] 101. Induced draft fan. DETAILED DESCRIPTION

[0077] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0078] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0079] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0080] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0081] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0082] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0083] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0084] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0085] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0086] See also Figures 1 to 5 This embodiment relates to a flue gas treatment system for a papermaking garbage incinerator, comprising:

[0087] A furnace 1, wherein a dense phase zone 11 is provided in the furnace 1, and a first smoke outlet 12 is provided at the upper portion of the furnace 1;

[0088] The first denitrification mechanism 2 is arranged on the dense phase zone 11, and the first denitrification mechanism 2 is used to reduce and remove nitrogen oxides in the flue gas; since the moisture content of the waste slag entering the furnace is generally 50-55%, during combustion, the temperature of the furnace 1 is relatively low, the combustion time is relatively long, and more flue gas is generated during the combustion process. Therefore, the first denitrification mechanism 2 is provided in the dense phase zone 11 of the furnace 1 to first remove the generated flue gas and reduce nitrogen oxides to avoid insufficient subsequent treatment.

[0089] The separation mechanism 3 is connected to the first smoke outlet 12 and is used to separate solid particles (such as dust, fly ash, etc.) from the flue gas. A second smoke outlet 31 is provided at the upper portion of the separation mechanism 3. The separation mechanism 3 separates the solid particles from the flue gas to improve environmental protection. In this embodiment, the separation mechanism 3 is a cyclone separator.

[0090] The second denitrification mechanism 5 is located on the second smoke outlet 31 and is used to further reduce and remove nitrogen oxides from the flue gas. The second denitrification mechanism 5 further processes the nitrogen oxides in the flue gas to effectively reduce and remove the proportion of nitrogen oxides in the flue gas, ensuring that flue gas emissions meet environmental requirements, avoiding environmental pollution and improving environmental friendliness. Furthermore, the installation of the second denitrification mechanism 5 on the second smoke outlet 31 significantly reduces denitrification material consumption, while also reducing ammonia slip and reducing corrosion on the rear heating surfaces. This ensures stable boiler combustion and environmentally friendly emissions, ensuring safe and economical operation of the unit.

[0091] And a feeding mechanism 4, the first denitrification mechanism 2 is connected to the feeding mechanism 4 through a pipeline, the second denitrification mechanism 5 is connected to the feeding mechanism 4 through a pipeline, the feeding mechanism 4 is used to provide denitrification material to the first denitrification mechanism 2 and the second denitrification mechanism 5, wherein the denitrification material is liquid ammonia, and the liquid ammonia sprayed by the first denitrification mechanism 2 and the second denitrification mechanism 5 serves as a reducing agent, and reacts with nitrogen oxides in the flue gas under the action of a catalyst to generate harmless nitrogen and water.

[0092] Specifically, in the flue gas treatment system of the papermaking waste furnace in this embodiment, when in operation, denitrification materials are provided to the first denitrification mechanism 2 and the second denitrification mechanism 5 through the feeding mechanism 4. Since there is a certain amount of moisture when the waste slag enters the furnace, the temperature of the furnace 1 is relatively low during combustion, the combustion time is relatively long, and more flue gas is generated during the combustion process. At this time, the first denitrification mechanism 2 in the dense phase zone 11 of the furnace 1 first treats the nitrogen oxides in the generated flue gas to reduce and remove the nitrogen oxides in the flue gas to avoid insufficient subsequent treatment of the nitrogen oxides; then the nitrogen oxides in the flue gas are treated again by the second denitrification mechanism 5 through the second smoke outlet 31 to effectively reduce and remove the proportion of nitrogen oxides in the flue gas to ensure that the flue gas emissions meet environmental protection requirements, avoid environmental pollution, and improve environmental protection.

[0093] Optionally, in some embodiments, Figures 1 to 5 As shown, the flue gas treatment system for the papermaking waste incinerator further includes a control mechanism 6 and a first temperature detection mechanism 7. The first temperature detection mechanism 7 is disposed in the dense phase zone 11 and is configured to detect the temperature of the dense phase zone 11. The first temperature detection mechanism 7 is electrically connected to the control mechanism 6, and the feeding mechanism 4 is electrically connected to the control mechanism 6. The control mechanism 6 is configured to receive detection signals from the first temperature detection mechanism 7 and control the feeding mechanism 4 to supply denitrification material to the first denitrification mechanism 2. Specifically, the first temperature detection mechanism 7 monitors the temperature of the dense phase zone 11 in real time. When the first detection mechanism detects that the temperature of the dense phase zone 11 is at a preset value, the first detection mechanism sends a detection signal to the control mechanism 6. After receiving the detection signal, the control mechanism 6 identifies and processes the signal and controls the feeding mechanism 4 to supply denitrification material to the first denitrification mechanism 2, thereby treating nitrogen oxides in the flue gas. The preset temperature range is 850-900°C, which is within the optimal reaction temperature range for effectively treating nitrogen oxides in the flue gas and improving environmental performance. The first temperature detection mechanism 7 is a thermocouple temperature sensor.

[0094] Specifically, in this embodiment, Figures 1 to 5As shown, the flue gas treatment system for the papermaking waste incinerator further includes a second temperature detection mechanism 8 , which is disposed on the second smoke outlet 31 and is configured to detect the temperature of the second smoke outlet 31 . The second temperature detection mechanism 8 is electrically connected to the control mechanism 6 , which is further configured to receive detection signals from the second temperature detection mechanism 8 and control the feeding mechanism 4 to supply denitrification material to the first denitrification mechanism 2 and / or the second denitrification mechanism 5 . Specifically, the second temperature detection mechanism 8 monitors the temperature of the dense phase region 11 in real time. When the second temperature detection mechanism detects that the temperature of the second smoke outlet 31 is at a preset value, the second temperature detection mechanism sends a detection signal to the control mechanism 6 . Upon receiving the detection signal, the control mechanism 6 identifies and processes the signal and then controls the feeding mechanism 4 to supply denitrification material to the second denitrification mechanism 5 , thereby treating nitrogen oxides in the flue gas. The preset temperature range is 850-900°C, which is within the optimal reaction temperature range for effectively treating nitrogen oxides in the flue gas and improving environmental performance. The second temperature detection mechanism 8 is a thermocouple temperature sensor.

[0095] Furthermore, when the first detection mechanism detects that the temperature of the dense phase zone 11 is at a preset value, and when the second detection mechanism detects that the temperature of the second smoke outlet 31 is at a preset value, the control mechanism 6 controls the feeding mechanism 4 to simultaneously provide denitrification materials to the first denitrification mechanism 2 and the second denitrification mechanism 5, so that the first denitrification mechanism 2 and the second denitrification mechanism 5 simultaneously treat the nitrogen oxides in the flue gas, so as to effectively treat the nitrogen oxides in the flue gas and improve environmental protection.

[0096] Optionally, in some embodiments, Figures 1 to 5 As shown, the height of the dense phase zone 11 is 6000-6600 mm. Preferably, in this embodiment, the height of the dense phase zone 11 is 6500 mm. In the prior art, the height of the dense phase zone 11 is 5000 mm. In this embodiment, the dense phase zone 11 of the furnace 1 is increased by 1500 mm. At this time, the outlet temperature of the furnace 1 and the bed temperature of the dense phase zone 11 of the furnace 1 are increased by about 15°C year-on-year, the flue gas temperature at the upper part of the furnace 1 is increased, the temperature at the upper part of the boiler is increased, and the flue gas temperature at the second flue gas outlet 31 of the separation mechanism 3 is increased year-on-year, reaching the optimal denitration temperature, improving denitration efficiency, reducing ammonia escape, reducing endothermic combustion of waste, and suppressing the production of nitrogen oxides, hydrogen chloride, and carbon monoxide.

[0097] Optionally, in some embodiments, Figures 1 to 5As shown, the flue gas treatment system of the papermaking waste furnace also includes a returner 32 and a return pipe 33. The returner 32 is arranged below the separation mechanism 3. The returner 32 is connected to the separation mechanism 3. The returner 32 is connected to the furnace 1 through the return pipe 33. The returner 32 is used to collect the cabinet particles separated by the separation mechanism 3 and return them to the furnace 1 through the return pipe 33 for recycling.

[0098] Optionally, in some embodiments, Figures 1 to 5 As shown, the return device 32 is provided with a plurality of return air caps 34, and the aperture of the return air caps 34 is 2.3-2.6 mm. Figures 1 to 5 As shown, the aperture of the return air hood 34 is 2.5 mm, the aperture of the air hood in the prior art is 3 mm, and the aperture of the replacement air hood is 2.5 mm. At this time, the return air pressure is increased from 17.5 KPa to 33 KPa, and the return air volume is reduced from 6200 m3 to 3200 m3, which reduces the return circulation ratio and increases the combustion share of the dense phase zone 11 of the furnace 1; the flue gas temperature at the upper part of the furnace 1 increases, the temperature at the upper part of the boiler increases, and the flue gas temperature of the second flue gas outlet 31 of the separation mechanism 3 increases year-on-year, reaching the optimal temperature for denitrification, improving the denitrification efficiency, and reducing ammonia escape.

[0099] Optionally, in some embodiments, Figures 1 to 5 As shown, the first denitrification mechanism 2 includes a plurality of first ammonia denitrification guns 51, which are respectively arranged on both sides of the dense phase zone 11; the second denitrification mechanism 5 includes a plurality of second ammonia denitrification guns, which are respectively arranged on both sides of the second smoke outlet 31. It should be noted that in this embodiment, the number of first ammonia denitrification guns 51 and second ammonia denitrification guns is not limited.

[0100] Optionally, in some embodiments, Figures 1 to 5As shown, the feeding mechanism 4 includes a urea solution storage tank 41, a first water pump 42, a desalted water storage tank 43, a dilution water pump 44, a mixer 45, a first delivery pipeline 47, a second delivery pipeline 471, a third delivery pipeline 472, a fourth delivery pipeline 48 and an air supply component 46; the urea solution storage tank 41 is connected to the mixer 45 through a pipeline, and the first water pump 42 is arranged on the pipeline between the urea solution storage tank 41 and the mixer 45; the desalted water storage tank 43 and the mixer 45 are connected by pipelines, the dilution water pump 44 is installed on the pipeline between the desalted water storage tank 43 and the mixer 45; the mixer 45 is connected to the first denitration mechanism 2 via the first delivery pipeline 47; the mixer 45 is connected to the second denitration mechanism 5 via the second delivery pipeline 471; the air supply component 46 is connected to the first denitration mechanism 2 via the third delivery pipeline 472; and the air supply component 46 is connected to the second denitration mechanism 5 via the fourth delivery pipeline 48. Specifically, the air supply component 46 is an air compressor or a compressed air storage tank.

[0101] Specifically, in this embodiment, Figures 1 to 5 As shown, the feeding mechanism 4 further includes a first control switch 49, a second control switch 491, a third control switch 492, and a fourth control switch 493. The first control switch 49 is disposed on the first conveying pipeline 47 and is electrically connected to the control mechanism 6. The second control switch 491 is disposed on the second conveying pipeline 471 and is electrically connected to the control mechanism 6. The third control switch 492 is disposed on the third conveying pipeline 472 and is electrically connected to the control mechanism 6. The fourth control switch 493 is disposed on the fourth conveying pipeline 48 and is electrically connected to the control mechanism 6. It should be noted that the structure of the feeding mechanism 4 of this embodiment is not limited to this. Those skilled in the art may select other suitable feeding mechanisms 4 based on the teachings of this embodiment. The first control switch 49, the second control switch 491, the third control switch 492, and the fourth control switch 493 are all solenoid valves.

[0102] Specifically, in this embodiment, the temperature of the dense phase region 11 is detected in real time by the first temperature detection mechanism 7. When the first detection mechanism detects that the temperature of the dense phase region 11 is at a preset value, the first detection mechanism sends a detection signal to the control mechanism 6. After receiving the detection signal, the control mechanism 6 performs identification processing and then controls the opening of the first control switch 49 and the third control switch 492, so that the feeding mechanism 4 supplies denitrification material to the first denitrification mechanism 2, so that the first denitrification mechanism 2 can treat nitrogen oxides in the flue gas. Furthermore, the temperature of the dense phase region 11 is detected in real time by the second temperature detection mechanism 8. When the second detection mechanism detects that the temperature of the second smoke outlet 31 is at a preset value, the second detection mechanism sends a detection signal to the control mechanism 6. After receiving the detection signal, the control mechanism 6 performs identification processing and then controls the opening of the second control switch 491 and the fourth control switch 493, so that the feeding mechanism 4 supplies denitrification material to the second denitrification mechanism 5, so that the second denitrification mechanism 5 can treat nitrogen oxides in the flue gas.

[0103] Optionally, in some embodiments, Figures 1 to 5 As shown, the flue gas treatment system of the papermaking waste incinerator further includes a desulfurization tower 9, an induced draft fan 101, and a chimney 10. The desulfurization tower 9 is connected to the second smoke outlet 31 via a pipeline. The desulfurization tower 9 is used to remove sulfur dioxide from the flue gas to avoid air pollution and improve environmental protection. The desulfurization tower 9 is connected to the chimney 10 via a pipeline. The induced draft fan 101 is installed in the pipeline between the desulfurization tower 9 and the chimney 10. After denitrification and desulfurization, the flue gas is discharged from the chimney 10 via the induced draft fan 101, avoiding air pollution and improving environmental protection.

[0104] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A flue gas treatment system for a papermaking garbage incinerator, characterized in that: include: A furnace, wherein a dense phase zone is provided in the furnace, and a first smoke outlet is provided at an upper portion of the furnace; a first denitrification mechanism, the first denitrification mechanism being disposed on the dense phase zone and being used to reduce and remove nitrogen oxides in the flue gas; a separation mechanism connected to the first smoke outlet, the separation mechanism being used to separate solid particles from the smoke, and a second smoke outlet being provided on an upper portion of the separation mechanism; a second denitrification mechanism, the second denitrification mechanism being disposed on the second smoke outlet and being used to further reduce and remove nitrogen oxides in the flue gas; and a feeding mechanism, wherein the first denitrification mechanism is connected to the feeding mechanism via a pipeline, and the second denitrification mechanism is connected to the feeding mechanism via a pipeline, and the feeding mechanism is used to provide denitrification materials to the first denitrification mechanism and the second denitrification mechanism.

2. The flue gas treatment system for a papermaking waste incinerator according to claim 1, characterized in that: The flue gas treatment system of the papermaking garbage incinerator further includes a control mechanism and a first temperature detection mechanism; The first temperature detection mechanism is provided on the dense phase zone, and is used to detect the temperature of the dense phase zone; The first temperature detection mechanism is electrically connected to the control mechanism, and the feeding mechanism is electrically connected to the control mechanism. The control mechanism is used to receive the detection signal of the first temperature detection mechanism and control the feeding mechanism to provide denitration material to the first denitration mechanism.

3. The flue gas treatment system for a papermaking waste incinerator according to claim 2, characterized in that: The flue gas treatment system of the papermaking garbage incinerator further includes a second temperature detection mechanism; The second temperature detection mechanism is provided on the second smoke outlet, and is used to detect the temperature of the second smoke outlet; The second temperature detection mechanism is electrically connected to the control mechanism, and the control mechanism is further used to receive the detection signal of the second temperature detection mechanism and control the feeding mechanism to provide denitration material to the first denitration mechanism and / or the second denitration mechanism.

4. The flue gas treatment system for a papermaking waste incinerator according to claim 1, characterized in that: The height of the dense phase zone is 6000-6600 mm.

5. The flue gas treatment system for a papermaking waste incinerator according to claim 1, characterized in that: The flue gas treatment system of the papermaking garbage furnace also includes a return material and a return material pipe. The return material is arranged below the separation mechanism, the return material is connected to the separation mechanism, and the return material is connected to the furnace through the return material pipe.

6. The flue gas treatment system for a papermaking waste incinerator according to claim 5, characterized in that: A plurality of return air hoods are provided in the return device, and the aperture of the return air hoods is 2.3-2.6 mm.

7. The flue gas treatment system for a papermaking waste incinerator according to any one of claims 1 to 6, characterized in that: The first denitrification mechanism includes a plurality of first denitrification ammonia guns, and the plurality of first denitrification ammonia guns are respectively arranged on both sides of the dense phase zone; The second denitration mechanism includes a plurality of second denitration ammonia guns, and the plurality of second denitration ammonia guns are respectively arranged on both sides of the second smoke outlet.

8. The flue gas treatment system for a papermaking waste incinerator according to claim 3, characterized in that: The feeding mechanism includes a urea solution storage tank, a first water pump, a desalted water storage tank, a dilution water pump, a mixer, a first delivery pipeline, a second delivery pipeline, a third delivery pipeline, a fourth delivery pipeline and an air supply component; The urea solution storage tank is connected to the mixer via a pipeline, and the first water pump is provided on the pipeline between the urea solution storage tank and the mixer; The desalted water storage tank is connected to the mixer via a pipeline, and the dilution water pump is provided on the pipeline between the desalted water storage tank and the mixer; The mixer is connected to the first denitrification mechanism via the first delivery pipeline; The mixer is connected to the second denitrification mechanism via the second delivery pipeline; The gas supply component is connected to the first denitration mechanism via the third delivery pipeline; The gas supply component is connected to the second denitration mechanism through the fourth delivery pipeline.

9. The flue gas treatment system for a papermaking waste incinerator according to claim 8, characterized in that: The feeding mechanism further includes a first control switch, a second control switch, a third control switch and a fourth control switch; The first control switch is provided on the first delivery pipeline, and the first control switch is electrically connected to the control mechanism; The second control switch is provided on the second delivery pipeline, and the second control switch is electrically connected to the control mechanism; The third control switch is provided on the third delivery pipeline, and the third control switch is electrically connected to the control mechanism; The fourth control switch is disposed on the fourth conveying pipeline, and the fourth control switch is electrically connected to the control mechanism.

10. The flue gas treatment system for a papermaking waste incinerator according to any one of claims 1 to 6, characterized in that: The flue gas treatment system of the papermaking garbage incinerator also includes a desulfurization tower, an induced draft fan and a chimney; The desulfurization tower is connected to the second smoke outlet via a pipeline, and the desulfurization tower is used to remove sulfur dioxide from the flue gas; The desulfurization tower is connected to the chimney through a pipeline, and the induced draft fan is arranged on the pipeline between the desulfurization tower and the chimney.

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