Graded air distribution system for flue gas circulation and air preheating

Abstract

The invention relates to the technical field of garbage treatment, in particular to a graded air distribution system for flue gas circulation and air preheating. Comprising an air supply pipe, a first induced draft fan, a second induced draft fan, a conveying pipe, a flue gas pipeline and an airflow dispersion assembly, the output end of the first induced draft fan is connected with the air supply pipe, the conveying pipe is connected with the input end of the first induced draft fan, the flue gas pipeline is connected with the air supply pipe, and the airflow dispersion assembly is arranged on the air supply pipe; the airflow dispersion assembly comprises a plurality of groups of driving parts, a first-stage flow dividing cover, two second-stage flow dividing covers and a plurality of third-stage flow dividing covers, the first-stage flow dividing cover, the two second-stage flow dividing covers and the plurality of third-stage flow dividing covers are all movably arranged in the air supply pipe, and the plurality of groups of driving parts are all fixedly connected with the air supply pipe and are all located on the air supply pipe; and the first-stage flow dividing cover, the two second-stage flow dividing covers and the multiple third-stage flow dividing covers are connected with the corresponding driving pieces correspondingly, garbage can be dried in the incinerator, high-temperature incineration is matched, the garbage is combusted sufficiently, and the garbage treatment effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of garbage disposal, and in particular to a graded air distribution system for flue gas circulation and air preheating. Background Art

[0002] Waste treatment includes resource utilization, minimum generation and emission, harmless treatment, etc. Among the harmless treatment methods, incineration is a technology that can simultaneously achieve waste treatment reduction, harmlessness and resource utilization, and is widely valued. Existing incinerators mainly include grate incinerators, fluidized bed furnaces, rotary kiln incinerators and liquid injection furnaces. Existing waste incineration devices have the problems of single function and narrow application range.

[0003] In the prior art patent CN102168853A discloses a three-dimensional graded air supply combined waste incineration device, which arranges two groups of secondary air nozzles on the front wall and the rear wall of the furnace to disrupt the airflow in the furnace and make it self-mixed, greatly reducing the excess air coefficient in the furnace, and reducing the loss of incomplete combustion. The counter-blowing of the two groups of secondary air can organize the vortex flow of flue gas in the furnace, which can extend the travel of fly ash in the furnace and increase its combustion time. Due to the rotational separation effect of the airflow, part of the fly ash can be thrown back to the grate, reducing the escape amount of fly ash, which is beneficial to smoke and dust removal and reduces the loss of fly ash.

[0004] However, in the above-mentioned existing methods, during the existing garbage treatment process, the thickness of the garbage pile is uneven, and the garbage will not be fully burned in the incinerator, resulting in a poor garbage treatment effect. Summary of the invention

[0005] The purpose of the present invention is to provide a graded air distribution system for flue gas circulation and air preheating, which solves the problem that in the existing garbage treatment process, the thickness of the garbage pile is uneven, the garbage is not fully burned in the incinerator, and the garbage treatment effect is poor.

[0006] To achieve the above-mentioned purpose, the present invention adopts a hierarchical air distribution system for flue gas circulation and air preheating, comprising an air supply pipe, a first induced draft fan, a second induced draft fan, a delivery pipe, a flue gas duct and an airflow dispersion component, wherein the output end of the first induced draft fan is connected to the air supply pipe, the delivery pipe is connected to the input end of the first induced draft fan, the flue gas duct is connected to the air supply pipe, the second induced draft fan is arranged on the flue gas duct, and the airflow dispersion component is arranged on the air supply pipe; The air flow dispersion assembly includes multiple groups of driving parts, a primary flow diversion hood, two secondary flow diversion hoods and multiple tertiary flow diversion hoods. The primary flow diversion hood, the two secondary flow diversion hoods and the multiple tertiary flow diversion hoods are all movably arranged in the air supply duct. The multiple groups of driving parts are all fixedly connected to the air supply duct and are all located on the air supply duct. The primary flow diversion hood, the two secondary flow diversion hoods and the multiple tertiary flow diversion hoods are respectively connected to the corresponding driving parts.

[0007] Wherein, the air flow dispersion component also includes an air preheater, and the air preheater is fixedly connected to the air supply pipe and is located inside the air supply pipe.

[0008] Among them, the driving member includes a driving motor and a rotating shaft, the driving motor is fixedly connected to the air supply duct and is located on the outer wall of the air supply duct, the rotating shaft is connected to the output end of the driving motor and passes through the air supply duct, the first-level diverter hood, the two second-level diverter hoods and the multiple third-level diverter hoods are respectively connected to the corresponding rotating shafts.

[0009] Among them, the graded air distribution system for flue gas circulation and air preheating also includes two groups of wind direction adjustment components. The air supply pipe has two installation cavities, and the wind direction adjustment component is arranged in each of the installation cavities.

[0010] Among them, the wind direction adjustment component includes a first electric push rod, a trapezoidal block, a spring, a movable part and a wind direction plate, the wind direction plate is rotatably connected to the air supply duct and is located in the air supply duct, the first electric push rod is arranged in the installation cavity, the trapezoidal block is connected to the output end of the first electric push rod, the movable part is connected to the wind direction plate and is located in the installation cavity, and the movable part is also movably cooperated with the trapezoidal block, the air supply duct also has a groove, the spring is arranged in the groove, and is fixedly connected to the wind direction plate.

[0011] Wherein, the wind direction adjustment component also includes a guide arc bar, which is fixedly connected to the wind direction plate and is located on the outer side wall of the wind direction plate.

[0012] Wherein, the movable part includes a movable wheel and a mounting seat, the mounting seat is fixedly connected to the wind deflector and is located on the outer side wall of the mounting seat, and the movable wheel is rotatably connected to the mounting seat.

[0013] The invention relates to a graded air distribution system for flue gas circulation and air preheating. When supplying air to an incinerator, the first induced draft fan is used to transport air into the air supply duct. At the same time, the flue gas generated by combustion in the incinerator is partially discharged into the air supply duct through the flue gas duct under the action of the second induced draft fan. The air and high-temperature flue gas are combined in the air supply duct. The air and high-temperature flue gas are dispersed by the first-level flow divider, the second-level flow divider and the third-level flow divider in the air supply duct. Each flow divider is controlled to rotate by the corresponding driving member. The angle of each flow divider is adjusted according to the use needs. At this time, the cold and hot gases reach temperature balance through heat conduction, and enter the incinerator together with the high-temperature flue gas to dry the garbage and assist the incinerator in burning the garbage. The high-temperature flue gas is used to increase the recyclable use of heat, reduce costs, and promote the thorough reaction of harmful components in the flue gas. Through the above method, it is achieved that the garbage can be dried in the incinerator, and the garbage is fully burned in combination with high-temperature incineration, and the flue gas emission meets the standard, thereby improving the garbage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0016] Figure 2 It is a cross-sectional view of the overall internal structure of the first embodiment of the present invention.

[0017] Figure 3 It is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0018] Figure 4 It is a cross-sectional view of the overall internal structure of the second embodiment of the present invention.

[0019] Figure 5 It is an internal schematic diagram of the downwind plate adjustment according to the second embodiment of the present invention.

[0020] Figure 6 It is an internal schematic diagram of the adjustment of the upper wind deflector according to the second embodiment of the present invention.

[0021] Figure 7 It is an internal schematic diagram of the adjustment of the upper and lower wind deflectors of the second embodiment of the present invention.

[0022] Figure 8It is a partial cross-sectional view of the internal structure of the second embodiment of the present invention.

[0023] Fig. 9 It is a schematic diagram of the overall structure of the third embodiment of the present invention.

[0024] Fig.10 It is a cross-sectional view of the overall internal structure of the third embodiment of the present invention.

[0025] 100-incinerator, 101-air supply pipe, 102-first induced draft fan, 103-conveying pipe, 104-smoke duct, 105-first-stage diversion hood, 106-second-stage diversion hood, 107-third-stage diversion hood, 108-air preheater, 109-driving motor, 110-rotating shaft, 111-second induced draft fan, 201-first electric push rod, 202-trapezoidal block, 203-spring, 204-wind direction plate, 205-guide arc strip, 206-movable wheel, 207-mounting seat, 208-mounting cavity, 209-groove, 301-scraper, 302-filter, 303-fixed frame, 304-second electric push rod. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example

[0027] See also Figure 1 and Figure 2 ,in Figure 1 is a schematic diagram of the overall structure of the first embodiment, Figure 2 It is a cross-sectional view of the overall internal structure of the first embodiment.

[0028] The present invention provides a hierarchical air distribution system for flue gas circulation and air preheating: comprising an air supply pipe 101, a first induced draft fan 102, a delivery pipe 103, a flue gas duct 104 and an air flow dispersion component, the air flow dispersion component comprising a plurality of driving components, a primary flow distribution cover 105, two secondary flow distribution covers 106, a plurality of tertiary flow distribution covers 107 and an air preheater 108, the driving component comprising a driving motor 109 and a rotating shaft 110. The above-mentioned problem is solved by the above-mentioned solution.

[0029] According to this specific embodiment, the output end of the first induced draft fan 102 is connected to the air supply pipe 101, the delivery pipe 103 is connected to the input end of the first induced draft fan 102, the smoke pipe 104 is connected to the air supply pipe 101, the second induced draft fan 111 is arranged on the smoke pipe 104, the air flow dispersion component is arranged on the air supply pipe 101, and the delivery pipe 103 is connected to the incinerator 100. When supplying air to the incinerator 100, the first induced draft fan 102 is used to deliver air to the air supply pipe 101, and at the same time, the air in the incinerator 100 is Part of the flue gas is transported to the air supply pipe 101 through the flue gas duct 104, and the air and high-temperature flue gas are combined in the air supply pipe 101, and the air and high-temperature flue gas are dispersed by the airflow dispersion component, so that the air is heated and enters the incinerator 100 together with the high-temperature flue gas to dry the garbage and assist the incinerator 100 in burning the garbage. The use of high-temperature flue gas increases the recyclability of heat and reduces costs. Through the above method, it is possible to dry the garbage in the incinerator 100, and with the high-temperature incineration, the garbage is fully burned, thereby improving the garbage treatment effect.

[0030] The first-level flow divider 105, the two second-level flow divider 106 and the plurality of third-level flow divider 107 are all movably arranged in the air supply pipe 101, and the plurality of driving members are all fixedly connected to the air supply pipe 101 and are all located on the air supply pipe 101. The first-level flow divider 105, the two second-level flow divider 106 and the plurality of third-level flow divider 107 are respectively connected to the corresponding driving members. When supplying air to the incinerator 100, the first induced draft fan 102 is used to transport air into the air supply pipe 101. At the same time, the smoke generated by the combustion in the incinerator 100 is partially transported into the air supply pipe 101 through the smoke pipe 104 under the action of the second induced draft fan 111. The air and high-temperature smoke are discharged from the air supply pipe 101. 1, the air and high-temperature flue gas will be dispersed by the first-level diverter hood 105, the second-level diverter hood 106 and the third-level diverter hood 107 in the air supply duct 101, and each diverter hood is controlled to rotate by the corresponding driving member, and the angle of each diverter hood is adjusted according to the use needs. At this time, the cold and hot gases reach temperature balance through heat conduction, and enter the incinerator 100 together with the high-temperature flue gas to dry the garbage and assist the incinerator 100 in burning the garbage. Among them, the use of high-temperature flue gas increases the recyclable use of heat, reduces costs, and promotes the thorough reaction of harmful components in the flue gas. Through the above method, it is achieved that the garbage can be dried in the incinerator 100, and with the high-temperature incineration, the garbage is fully burned, the flue gas emission meets the standard, and the garbage treatment effect is improved.

[0031] Secondly, the air preheater 108 is fixedly connected to the air supply pipe 101 and is located inside the air supply pipe 101. The air preheater 108 can heat the air. The heated air enters the air supply pipe 101 and mixes with the high-temperature flue gas to increase the drying effect on the garbage.

[0032] At the same time, the driving motor 109 is fixedly connected to the air supply pipe 101 and is located on the outer wall of the air supply pipe 101. The rotating shaft 110 is connected to the output end of the driving motor 109 and passes through the air supply pipe 101. The first-level diverter hood 105, the two second-level diverter hoods 106 and the plurality of third-level diverter hoods 107 are respectively connected to the corresponding rotating shaft 110. The driving motor 109 is fixed on the outer wall of the air supply pipe 101. The driving motor 109 controls the diverter hood to move in the air supply pipe 101 through the rotating shaft 110.

[0033] When supplying air to the incinerator 100, the first induced draft fan 102 is used to transport air to the air supply pipe 101, and the air preheater 108 heats the air. At the same time, under the action of the second induced draft fan 111, part of the smoke generated by the combustion in the incinerator 100 passes through the smoke pipe 104 and enters the air supply pipe 101. The heated air and the high-temperature smoke are combined in the air supply pipe 101. The air and the high-temperature smoke are dispersed in the air supply pipe 101 by the first-level flow divider 105, the second-level flow divider 106 and the third-level flow divider 107. The diverter hood is controlled to rotate by the corresponding driving motor 109, and the angle of each diverter hood is adjusted according to the use needs. At this time, the cold and hot gases reach temperature balance through heat conduction, and enter the incinerator 100 together with the high-temperature flue gas to dry the garbage and assist the incinerator 100 in burning the garbage. Among them, the use of high-temperature flue gas increases the recyclable use of heat, reduces costs, and promotes the thorough reaction of harmful components in the flue gas. Through the above method, it is possible to dry the garbage in the incinerator 100, cooperate with high-temperature incineration, make the garbage burn fully, and meet the flue gas emission standards, thereby improving the garbage treatment effect. Example

[0034] See also Figure 3~Figure 8 ,in Figure 3 is a schematic diagram of the overall structure of the second embodiment, Figure 4 is a cross-sectional view of the overall internal structure of the second embodiment, Figure 5 is an internal schematic diagram of the adjustment of the downwind plate 204 of the second embodiment, Figure 6 is an internal schematic diagram of the adjustment of the upper wind deflector 204 of the second embodiment, Figure 7 is an internal schematic diagram of the adjustment of the upper and lower wind deflectors 204 of the second embodiment, Figure 8It is a partial cross-sectional view of the internal structure of the second embodiment of the present invention.

[0035] Based on the first embodiment, the present invention provides a graded air distribution system for flue gas circulation and air preheating, which also includes two sets of wind direction adjustment components, and the wind direction adjustment components include a first electric push rod 201, a trapezoidal block 202, a spring 203, a movable part, a wind direction plate 204 and a guide arc strip 205, and the movable part includes a movable wheel 206 and a mounting seat 207.

[0036] The air supply pipe 101 has two installation cavities 208, each of which is provided with the wind direction adjustment component. The air supply pipe 101 has two installation cavities 208, each of which is provided with the wind direction adjustment component. The air supply angle is adjusted by the wind direction adjustment component, and the air supply angle can be changed according to demand, which is beneficial to the burning of garbage in the incinerator 100.

[0037] The wind direction plate 204 is rotatably connected to the air supply pipe 101 and is located in the air supply pipe 101. The first electric push rod 201 is arranged in the installation cavity 208. The trapezoidal block 202 is connected to the output end of the first electric push rod 201. The movable part is connected to the wind direction plate 204 and is located in the installation cavity 208. The movable part also cooperates with the trapezoidal block 202. The air supply pipe 101 also has a groove 209. The spring 203 is arranged in the groove 209 and is fixedly connected to the wind direction plate 204. When it is necessary to adjust the air supply angle of the hot air, the first electric push rod 201 in the installation cavity 208 is started, and the first electric push rod 201 is turned on. The movable push rod 201 pushes the trapezoidal block 202 to move in the installation cavity 208, and the inclined surface of the trapezoidal block 202 will contact the movable part and push the movable part. The movable part is forced to drive the wind direction plate 204 to rotate in the air supply pipe 101, and at the same time, the spring 203 will stretch in the groove 209, and the spring 203 will pull the wind direction plate 204. After the wind direction plate 204 is adjusted, the wind direction plate 204 can guide the heated air. In the above manner, through the directional adjustment of the air volume and wind direction, the oxygen content in the reaction process is increased, the accelerated and thorough combustion reaction is promoted, and the emission of harmful waste residues and harmful gases is reduced.

[0038] The guide arc strip 205 is fixedly connected to the wind direction plate 204 and is located on the outer side wall of the wind direction plate 204 . The guide arc strip 205 has a curved surface, which can guide the hot air and facilitate the hot air to enter the incinerator 100 .

[0039] The mounting seat 207 is fixedly connected to the wind deflector 204 and is located on the outer wall of the mounting seat 207. The movable wheel 206 is rotatably connected to the mounting seat 207. The mounting seat 207 is fixed on the wind deflector 204. The movable wheel 206 is movably mounted on the mounting seat 207. The inclined surface on the trapezoidal block 202 can squeeze and push the movable wheel 206. The movable wheel 206 is subjected to the force to drive the wind deflector 204 to move in the air supply duct 101.

[0040] When it is necessary to adjust the air supply angle of the hot air, start the first electric push rod 201 in the installation cavity 208, and the first electric push rod 201 pushes the trapezoidal block 202 to move in the installation cavity 208. The inclined surface of the trapezoidal block 202 will contact the movable wheel 206 and push the movable wheel 206. The movable wheel 206 is driven by the force to drive the wind direction plate 204 to rotate in the air supply pipe 101. At the same time, the spring 203 will be stretched in the groove 209, and the spring 203 has a pulling effect on the wind direction plate 204. After the adjustment of the wind direction plate 204 is completed, the wind direction plate 204 can guide the heated air. In the above manner, through the directional adjustment of the air volume and wind direction, the oxygen content in the reaction process is increased, the accelerated and thorough combustion reaction is promoted, and the emission of harmful waste residues and harmful gases is reduced. Example

[0041] See also Fig. 9 and Fig.10 ,in Fig. 9 is a schematic diagram of the overall structure of the third embodiment, Fig.10 It is a cross-sectional view of the overall internal structure of the third embodiment.

[0042] Based on the second embodiment, the present invention provides a graded air distribution system for flue gas circulation and air preheating, which also includes a filter component, the filter component includes a push member, a scraper 301 and a filter screen 302, and the push member includes a fixing frame 303 and a second electric push rod 304.

[0043] The filter assembly is disposed in the delivery pipe 103 . By disposing the filter assembly, the filter assembly can filter and block dust in the air, thereby preventing dust from entering the air supply pipe 101 .

[0044] The filter 302 is fixedly connected to the delivery pipe 103 and is located in the delivery pipe 103. The pushing piece is fixedly connected to the delivery pipe 103 and is located on the delivery pipe 103. The scraper 301 is connected to the pushing piece and is located on the outside of the filter 302. By arranging the filter 302 in the delivery pipe 103, the filter 302 is used to filter and block dust in the air in the delivery pipe 103 to prevent dust from entering the air supply pipe 101. When a lot of dust is retained on the surface of the filter 302, the pushing piece on the delivery pipe 103 is started, and the pushing piece drives the scraper 301 to scrape the surface of the filter 302 back and forth. The dust retained on the surface of the filter 302 will be removed, and the dust will be removed through the inclined surface at the port of the delivery pipe 103, thereby ensuring the filtering effect of the filter 302.

[0045] The fixing frame 303 is fixedly connected to the delivery pipe 103 and is located above the delivery pipe 103. The second electric push rod 304 is fixedly connected to the fixing frame 303 and is located inside the fixing frame 303. The output end of the second electric push rod 304 passes through the delivery pipe 103. The scraper 301 is connected to the output end of the second electric push rod 304. The fixing frame 303 is fixed on the air supply pipe 101. The fixing frame 303 fixedly supports the second electric push rod 304 on the air supply pipe 101. The second electric push rod 304 controls the scraper 301 to scrape and clean the surface of the filter 302, so that the dust retained on the surface of the filter 302 is removed, thereby ensuring the filtering effect of the filter 302.

[0046] By arranging the filter 302 in the delivery pipe 103, the filter 302 is used to filter and block dust in the air in the delivery pipe 103 to prevent dust from entering the air supply pipe 101. When a lot of dust is retained on the surface of the filter 302, the second electric push rod 304 on the delivery pipe 103 is started, and the fixing frame 303 fixes and supports the second electric push rod 304 on the air supply pipe 101. The second electric push rod 304 drives the scraper 301 to scrape the surface of the filter 302 back and forth. The dust retained on the surface of the filter 302 will be removed, and the dust will be removed through the inclined surface at the port of the delivery pipe 103, thereby ensuring the filtering effect of the filter 302.

[0047] The above disclosures are only various preferred embodiments of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention are still within the scope of the invention.

Claims

1. A graded air distribution system for flue gas circulation and air preheating, characterized in that: The invention comprises an air supply pipe, a first induced draft fan, a second induced draft fan, a delivery pipe, a smoke duct and an airflow dispersion component, wherein the output end of the first induced draft fan is connected to the air supply pipe, the delivery pipe is connected to the input end of the first induced draft fan, the smoke duct is connected to the air supply pipe, the second induced draft fan is arranged on the smoke duct, and the airflow dispersion component is arranged on the air supply pipe; The air flow dispersion assembly includes multiple groups of driving parts, a primary flow diversion hood, two secondary flow diversion hoods and multiple tertiary flow diversion hoods. The primary flow diversion hood, the two secondary flow diversion hoods and the multiple tertiary flow diversion hoods are all movably arranged in the air supply duct. The multiple groups of driving parts are all fixedly connected to the air supply duct and are all located on the air supply duct. The primary flow diversion hood, the two secondary flow diversion hoods and the multiple tertiary flow diversion hoods are respectively connected to the corresponding driving parts.

2. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 1, characterized in that: The air flow dispersion component also includes an air preheater, which is fixedly connected to the air supply pipe and is located inside the air supply pipe.

3. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 2, characterized in that: The driving member includes a driving motor and a rotating shaft. The driving motor is fixedly connected to the air supply duct and is located on the outer wall of the air supply duct. The rotating shaft is connected to the output end of the driving motor and passes through the air supply duct. The first-level diverter hood, the two second-level diverter hoods and the plurality of third-level diverter hoods are respectively connected to the corresponding rotating shafts.

4. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 1, characterized in that: The graded air distribution system for flue gas circulation and air preheating also includes two groups of wind direction adjustment components. The air supply pipe has two installation cavities, and the wind direction adjustment component is arranged in each of the installation cavities.

5. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 4, characterized in that: The wind direction adjustment assembly includes a first electric push rod, a trapezoidal block, a spring, a movable part and a wind direction plate. The wind direction plate is rotatably connected to the air supply duct and is located in the air supply duct. The first electric push rod is arranged in the installation cavity. The trapezoidal block is connected to the output end of the first electric push rod. The movable part is connected to the wind direction plate and is located in the installation cavity. The movable part also movably cooperates with the trapezoidal block. The air supply duct also has a groove. The spring is arranged in the groove and fixedly connected to the wind direction plate.

6. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 5, characterized in that: The wind direction adjustment component also includes a guide arc strip, which is fixedly connected to the wind direction plate and is located on the outer side wall of the wind direction plate.

7. The hierarchical air distribution system for flue gas circulation and air preheating according to claim 6, characterized in that: The movable part comprises a movable wheel and a mounting seat, the mounting seat is fixedly connected to the wind deflector and is located on the outer side wall of the mounting seat, and the movable wheel is rotatably connected to the mounting seat.

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