Biomass boiler dust and nitrate integrated treatment system based on AI dynamic regulation

Abstract

The application discloses a biomass boiler dust and nitration integrated treatment system based on AI dynamic regulation and control, which is used for treating flue gas after biomass combustion and comprises a dust and nitration integrated device, a primary flue and a clean flue. The dust and nitration integrated device comprises a horizontally distributed high-temperature dust collector and an SCR reactor, the high-temperature dust collector and the SCR reactor are arranged in a common wall mode, flue gas flows through the high-temperature dust collector and the SCR reactor in sequence, the high-temperature dust collector is provided with a flue gas inlet, the SCR reactor is provided with a flue gas outlet, the primary flue is connected with the flue gas inlet, and the clean flue is connected with the flue gas outlet. The application replaces the conventional process of first SCR denitration, then temperature reduction and then bag dust removal, avoids the phenomenon that the SCR catalyst is adhered and poisoned by biomass alkali metal ash, and simultaneously, the dust and nitration integrated (common wall) design can reduce the exposed outer wall of the high-temperature dust collector and the SCR reactor, reduces heat loss, and thus improves heat recovery capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of biomass energy clean utilization and environmental protection equipment, and particularly relates to a biomass boiler dust and nitrate integrated treatment system based on AI dynamic regulation. BACKGROUND

[0002] Biomass boilers have become new carbon reduction equipment and are widely used. In the current energy utilization technology field, a biomass boiler, as a device for utilizing biomass energy for heating or power generation, is usually composed of a combustion chamber, a heat exchange system, and a flue gas purification system. Biomass fuel (such as straw, sawdust) ash is rich in alkali metals such as K and Na, and the dust generated by combustion has strong adhesion. However, compared with traditional coal-fired boilers, biomass boilers have higher fuel utilization rate and low carbon emission advantage.

[0003] In actual use, the flue gas discharged by the biomass boiler has a lot of heat in addition to the above-mentioned impurities, and how to better recover and utilize the heat in the flue gas has great benefits for energy saving and emission reduction. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the present application provides a biomass boiler dust and nitrate integrated treatment system based on AI dynamic regulation, which has the advantages of better energy saving.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A biomass boiler dust and nitrate integrated treatment system based on AI dynamic regulation is used to treat flue gas after biomass combustion.

[0007] It comprises:

[0008] A dust and nitrate integrated device comprising a horizontally distributed high-temperature dust collector and an SCR reactor, the high-temperature dust collector and the SCR reactor are arranged in a common wall, and the flue gas flows through the high-temperature dust collector and the SCR reactor in sequence, the high-temperature dust collector has a smoke inlet, and the SCR reactor has a smoke outlet.

[0009] An original flue gas duct connected to the smoke inlet;

[0010] A clean flue gas duct connected to the smoke outlet.

[0011] The existing SCR reactor + cloth filter bag is separately arranged; of course, the process of high-temperature metal filter bag dust collector + SCR reactor is also used, but not co-wall. This is because the high-temperature dust collector and the SCR reactor are two independent units, and connecting the high-temperature dust collector and the SCR reactor through the connecting flue is the most normal arrangement. However, the above arrangement makes all the walls of the high-temperature dust collector and the SCR reactor in an exposed state, and the heat dissipation is large, which is not conducive to heat recycling. The co-wall arrangement of the high-temperature dust collector and the SCR reactor can reduce the exposed outer wall of the high-temperature dust collector and the SCR reactor, reduce heat loss, improve heat recycling capacity, and save materials.

[0012] Optionally, the outside of the dust and nitration integrated device is wrapped with a heat insulation layer.

[0013] By adopting the above technical scheme, the outside of the dust and nitration integrated device is wrapped with a heat insulation layer, which can reduce heat dissipation and improve heat preservation, and the heat exchange is less when the flue gas flows through the dust and nitration integrated device, which is beneficial to subsequent heat recycling.

[0014] Optionally, a communication port for communicating the high-temperature dust collector and the SCR reactor is arranged at the upper end of the co-wall of the high-temperature dust collector and the SCR reactor.

[0015] By adopting the above technical scheme, the high-temperature dust collector and the SCR reactor are communicated through the communication port without using the connecting flue, which reduces the heat loss at the connecting flue and reduces the flue gas resistance.

[0016] Optionally, a flue gas guide assembly is arranged at one side of the SCR reactor.

[0017] By adopting the above technical scheme, the existence of the flue gas guide assembly improves the flowability of the flue gas, thereby reducing the resistance, which can reduce the power of the equipment (such as a fan) for driving the flue gas flow, thereby achieving the energy-saving effect.

[0018] Optionally, the flue gas guide assembly comprises a plurality of flue gas guide plates arranged parallel to each other and equidistantly; the flue gas guide plates are arranged obliquely and obliquely downward along the direction away from the high-temperature dust collector.

[0019] By adopting the above technical scheme, the flue gas flows to the catalyst layer of the SCR reactor under the guidance of the flue gas guide plate, which reduces the movement path of the flue gas and avoids the flue gas from impacting on the side wall of the SCR reactor, thereby improving the flowability of the flue gas.

[0020] Optionally, the original flue is provided with an ammonia injection grid; the ammonia injection grid is used for uniform injection of ammonia; the high-temperature dust collector comprises a plurality of evenly distributed metal filter bags.

[0021] By adopting the above technical scheme, the ammonia injection grid is arranged at the front side of the high-temperature dust collector, and the high-temperature dust collector with large capacity and low flow rate is used. Compared with the conventional arrangement of the ammonia injection grid arranged at the SCR inlet flue, the metal filter bag provides a larger contact area, promotes turbulent mixing, and ammonia gas diffuses through the micropores of the metal filter bag to form uniform gas mist, so that the ammonia gas and the flue gas are more fully mixed, ensuring that the ammonia gas entering the subsequent SCR reactor is uniformly distributed, avoiding local excess or deficiency, and improving the denitration efficiency of the subsequent SCR reactor. At the same time, since the ash of biomass fuel (such as straw and sawdust) is rich in alkali metals such as K and Na, the dust generated by combustion has strong adhesion. If a general low-temperature (below 220℃) cloth filter bag is used, the SCR reactor (300℃~420℃) can only be prepositioned, and then the temperature is lowered for dust removal. The alkali metal dust in the original flue gas will adhere to the catalyst pores, causing catalyst poisoning.

[0022] Optionally, the top of the high-temperature dust collector is provided with a blowing assembly; the blowing assembly is used to spray compressed air to all metal filter bags at the same time; and the bottom of the high-temperature dust collector is provided with an ash bucket.

[0023] By adopting the above technical scheme, the blowing assembly sprays compressed air to the metal filter bag, and the compressed air passes through the filter holes of the metal filter bag to remove the dust adhered to the outer surface of the metal filter bag. Since the filter bag is made of metal, the dust is easy to fall off under the impact of compressed air. The falling dust will fall into the ash bucket below for collection, which is conducive to subsequent centralized cleaning.

[0024] Optionally, the ash bucket is provided with an ultrasonic oscillator.

[0025] By adopting the above technical scheme, since the ammonia injection grid is arranged at the front side of the high-temperature dust collector, the ammonia gas will be absorbed by the dust on the metal filter bag when flowing through the metal filter bag. When the dust falls from the metal filter bag, it will contact the rising ammonia gas and be absorbed again. In this way, the ammonia gas will be lost to some extent, which will affect the catalytic effect of the subsequent SCR reactor and is not conducive to accurate control of the ammonia gas. Therefore, the ultrasonic oscillator is arranged in the ash bucket. When the ultrasonic oscillator works, it drives the dust in the ash bucket to vibrate, so that the ammonia gas adsorbed by the dust flows to the metal filter bag again and then enters the SCR reactor. In this way, the catalytic effect of the SCR reactor is greatly improved, and the injection amount of ammonia gas is accurately controlled.

[0026] Optionally, the blowing frequency and blowing pressure of the blowing assembly are changed in real time according to the differential pressure between the inlet and outlet of the metal filter bag.

[0027] By adopting the above technical scheme, when the differential pressure of the inlet and outlet end of the metal filter bag is greater than the set value, it indicates that the metal filter bag needs to be cleaned, so the blowing frequency and blowing pressure of the blowing assembly are increased, thereby increasing the cleaning capacity thereof; when the differential pressure of the inlet and outlet end of the metal filter bag is less than the set value, it indicates that the metal filter bag is cleaned excessively, so the blowing frequency and blowing pressure of the blowing assembly are reduced, thereby weakening the cleaning capacity thereof, so that the metal filter bag quickly recovers to the set filtering capacity, so that the filtering capacity of the metal filter bag is always controlled in the set range, which is beneficial to the control of the whole system.

[0028] Optionally, a backflow device is arranged between the original flue and the clean flue.

[0029] By adopting the above technical scheme, the clean flue gas is backflowed to the front end when the boiler is in low load, so as to ensure the minimum flow rate of the flue gas at the inlet of the SCR reactor, meet the flow rate deviation rate of the inlet of the SCR reactor ≤10%, and make the SCR reactor always in a stable operation state in the load range of 30%-100%, so as to ensure the catalytic efficiency thereof. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a system schematic diagram of the present application.

[0031] Figure 2 is a structure schematic diagram of the dust and nitrogen integrated device of the present application.

[0032] Figure 3 is a structure schematic diagram of the dust and nitrogen integrated device of the present application. Figure 2 is a partially enlarged structure schematic diagram of A in the present application.

[0033] Figure 4 is a structure schematic diagram of the cross section of the metal filter bag of the fourth embodiment of the present application.

[0034] Figure 5 is a structure schematic diagram of the cross section of the metal filter bag of the fourth embodiment of the present application. Figure 4 is a partially enlarged structure schematic diagram of A in the present application.

[0035] Figure 6 is a structure schematic diagram of the cross section of the metal filter bag of the fourth embodiment of the present application. Figure 4 is a partially enlarged structure schematic diagram of B in the present application.

[0036] MARK NO.

[0037] Flue gas duct; 2, dust and nitration integrated device; 200, communication port; 3, high-temperature dust collector; 31, metal filter bag; 311, connecting flange; 312, stainless steel filter layer; 313, stainless steel support net; 314, expansion piece; 3141, air pocket ring; 3142, driving rod; 3143, metal elastic sheet; 3144, outer support sleeve; 3145, support bottom ring; 3146, main body sleeve; 3147, connecting part; 3148, sleeve base; 32, ash bucket; 33, ultrasonic oscillator; 34, bin pump; 35, blowing assembly; 4, SCR reactor; 41, flue gas flow guide assembly; 42, flue gas flow guide plate; 5, clean flue gas duct; 6, backflow flue gas duct; 7, ammonia injection grid; 8, backflow fan; 9, AI dynamic control system; 91, original flue gas duct CEMS; 92, ammonia gas regulating valve; 93, original flue gas duct temperature and pressure measuring point; 94, dust collector differential pressure gauge; 95, dust and nitration integrated differential pressure gauge; 96, SCR temperature and pressure measuring point; 97, clean flue gas duct CEMS; 98, AI dynamic optimization control system. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the drawings Figures 1-3 The application will be further described in detail.

[0039] Example one: disclose a kind of biomass boiler dust and nitration integrated processing system based on AI dynamic regulation, refer to Figure 1, original flue 1, dust and nitrate integrated device 2, clean flue 5, ammonia injection grid 7 and AI dynamic control system 9; the dust and nitrate integrated device 2 comprises a high-temperature dust collector 3 and an SCR reactor 4 connected with each other; the high-temperature dust collector 3 has a smoke inlet; the SCR reactor 4 has a smoke outlet; one end of the original flue 1 is connected with the biomass boiler, and the other end is connected with the smoke inlet of the high-temperature dust collector 3; one end of the clean flue 5 is connected with the smoke outlet of the SCR reactor 4, and the other end is connected with a heat recovery device; the ammonia injection grid 7 is installed in the original flue 1; the AI dynamic control system 9 is used to control the ammonia injection amount of the ammonia injection grid 7. Biomass fuel (such as straw, sawdust) is burned in the biomass boiler, and the flue gas after combustion enters the original flue 1. The ammonia gas is injected into the original flue 1 and mixed with the flue gas, and then enters the high-temperature dust collector 3 for dust removal. Then the flue gas after dust removal enters the SCR reactor 4. The catalyst in the SCR reactor 4 reduces the nitrogen oxides in the flue gas into harmless nitrogen and water under the action of the reducing agent ammonia. The nitrogen and water are discharged along the clean flue 5. Since the flue gas still has a relatively high temperature at this time, the flue gas can be discharged along the clean flue 5 into the heat recovery device for heat recovery. In this process, since the ammonia injection grid 7 is located on the front side of the high-temperature dust collector 3, compared with the common arrangement of setting the ammonia injection grid 7 after the high-temperature dust collector 3 and before the SCR reactor 4, the ammonia gas passes through the high-temperature dust collector 3 and is fully mixed with the flue gas, thereby effectively improving the catalytic reduction effect of the subsequent SCR reactor 4. In addition, after the flue gas passes through the high-temperature dust collector 3, the dust concentration in the flue gas is ≤10 mg / Nm³, and the dust content is very low, so the SCR reactor 4 can not be provided with a soot blower, which is different from the existing common SCR reactor 4.

[0040] Reference Figure 2 In the existing conventional arrangement, the high-temperature dust collector 3 and the SCR reactor 4 are generally arranged separately. This is because the high-temperature dust collector 3 and the SCR reactor 4 are two independent units themselves. It is the most normal arrangement to connect the high-temperature dust collector 3 and the SCR reactor 4 through a connecting flue. However, the above arrangement makes all the walls of the high-temperature dust collector 3 and the SCR reactor 4 in an exposed state, which has a large heat dissipation amount, and is not conducive to heat recovery and utilization. In order to solve the above problem, in the present embodiment, the high-temperature dust collector 3 and the SCR reactor 4 are arranged horizontally and share a wall, which can reduce the exposed outer wall of the high-temperature dust collector 3 and the SCR reactor 4, reduce heat loss, thereby improve the heat recovery capacity and energy saving performance, and at the same time, due to the reduction of the outer wall, the material can be saved. In addition, since the high-temperature dust collector 3 and the SCR reactor 4 share a wall, the connecting flue can be shortened or not used, which reduces the heat loss at the connecting flue and the flue gas resistance.

[0041] Reference Figure 2, the upper end of the common wall of the high-temperature dust collector 3 and the SCR reactor 4 is provided with a communication port 200 for communication between the two, so that the communication flue is not used, thereby reducing the heat loss at the communication flue and reducing the flue gas resistance, and the total resistance is ≤2000 Pa, which is 20% lower than the conventional resistance. In order to further reduce the overall heat dissipation of the dust-nitrogen integrated device 2, the dust-nitrogen integrated device 2 is wrapped with a heat insulation layer, wherein the heat insulation can adopt ceramic fiber, rock wool or calcium silicate board, and the temperature of the high-temperature dust collector 3 and the SCR reactor 4 is 300-420°C.

[0042] Reference Figure 2 , in operation, the flue gas passes through the communication port 200 and enters the SCR reactor 4 from the high-temperature dust collector 3. Since the high-temperature dust collector 3 and the SCR reactor 4 are horizontally distributed, the flue gas flows horizontally after passing through the communication port 200. However, since the three layers of catalyst beds in the SCR reactor 4 are arranged from top to bottom, the flue gas will not first enter the catalyst bed, but will hit the side wall of the SCR reactor 4 opposite the communication port 200, which will increase the resistance of the flue gas and increase the power of the driving member (such as a fan) driving the flue gas flow. In order to solve the above problem, a flue gas flow guide assembly 41 is arranged on one side of the SCR reactor 4 where the communication port 200 is located. The flue gas is guided to the catalyst bed under the action of the flue gas flow guide assembly 41 to avoid impact. Reference Figure 3 , the flue gas flow guide assembly 41 includes a plurality of flue gas flow guide plates 42 arranged parallel to each other and equidistantly; the flue gas flow guide plates 42 are inclined and arranged downward along the direction away from the high-temperature dust collector 3, so that the flue gas flows to the catalyst bed through the inclined channels between adjacent flue gas flow guide plates 42; in order to improve the stability of the flue gas flow guide plates 42, a plurality of vertically arranged connecting walls are arranged between adjacent flue gas flow guide plates 42.

[0043] Reference Figure 2, high-temperature dust collector 3 includes a spray assembly 35 at the top, a plurality of evenly distributed metal filter bags 31 in the middle, a hopper 32 at the bottom, and a bin pump 34 connected to the opening at the lower end of the hopper 32. When working, the mixed flue gas of ammonia and flue gas is filtered by the metal filter bag 31 to remove dust, the spray assembly 35 intermittently and simultaneously sprays compressed air from top to bottom on the metal filter bag 31 to make the dust adhering to the outer surface of the metal filter bag 31 fall into the hopper 32, and the bin pump 34 works intermittently to remove the dust in the hopper 32. The filter bag in the existing high-temperature dust collector cannot use cloth filter bags because cloth filter bags can only withstand flue gas temperatures below 220℃. The conventional SCR reactor + cooling + cloth filter bag, due to the fact that biomass fuel (such as straw, wood chips) ash is rich in alkali metals such as K and Na, the dust generated by combustion has strong adhesion, which will adhere to the pores of the catalyst, causing the catalyst to be poisoned. Therefore, in this embodiment, metal filter bags that can withstand high temperatures are used, and under the impact of compressed air, the dust falls off easily, improving the service life of the filter bag.

[0044] Reference Figure 2 , the metal filter bag 31 is in the shape of a hollow cylinder with an open upper end and a closed lower end. It is made of a combination of 316L stainless steel metal fiber filter bags and 304L bag cages (or 304L support nets) to withstand high-temperature flue gas of 300℃-420℃. Considering the actual use scenario, all metal filter bags 31 are arranged in a rectangular array. The flue gas passes through the side wall of the metal filter bag 31 and then exits from the upper end. Since the traditional ammonia injection position is set after the high-temperature dust collector 3 and before the SCR reactor 4, in this embodiment, the metal filter bag 31 provides a larger contact area, promotes turbulent mixing, and the ammonia gas diffuses through the metal filter bag 31 micropores to form a uniform mist, ensuring uniform distribution of ammonia gas entering the SCR reactor 4, avoiding local excess or deficiency, and improving denitration efficiency.

[0045] Reference Figure 2 , the spray assembly 35 includes a plurality of spray lines and a plurality of pulse valves; a plurality of nozzles are installed on the spray lines; the nozzles correspond one-to-one to the metal filter bags 31 and are located on the metal filter bags 31; the spray lines and the pulse valves correspond one-to-one and the pulse valves are used for compressed air to enter the spray lines; the pulse valves are used to connect the spray lines with the external compressed air supply device.

[0046] Reference Figure 1 , the AI dynamic control system 9 includes a raw flue CEMS 91, an ammonia valve 92, a raw flue temperature and pressure measuring point 93, a dust collector differential pressure meter 94, a dust and nitration integrated differential pressure meter 95, an SCR temperature and pressure measuring point 96, a clean flue CEMS 97, and an AI dynamic optimization control system 98.

[0047] Wherein the dust collector differential pressure gauge 94 is used to monitor the differential pressure between the inlet and outlet of the metal filter bag 31, and the AI dynamic optimization control system 98 changes the blowing frequency and blowing pressure of the blowing assembly 35 in real time according to the data detected by the dust collector differential pressure gauge 94. When the differential pressure between the inlet and outlet of the metal filter bag 31 is greater than the set value, it means that the metal filter bag 31 needs to be cleaned, so the blowing frequency and blowing pressure of the blowing assembly 35 are increased to increase its cleaning ability; when the differential pressure between the inlet and outlet of the metal filter bag 31 is less than the set value, it means that the metal filter bag 31 is over-cleaned, so the blowing frequency and blowing pressure of the blowing assembly 35 are reduced to weaken its cleaning ability, so that the metal filter bag 31 quickly recovers to the set filtering capacity, so that the filtering capacity of the metal filter bag 31 is always controlled within the set range, which is beneficial to the control of the entire system. Through the AI data model, the AI core calculation is guided, and when the detection data continuously increases, the AI data model will become more and more perfect, and the AI core calculation will become more and more accurate.

[0048] Wherein, the AI dynamic control system 9 based on the multivariable feedforward-feedback composite AI control algorithm of the flue gas load fluctuation, improves the control reaction rate, realizes the ammonia gas adjusting valve 92 and the import and export NOx concentration and multi-parameter feedforward-feedback joint control.

[0049] Example two: the difference between example two and example one is that: Figure 2 Because the ammonia injection position of example one is not arranged in the traditional way: after the high-temperature dust collector 3 and before the SCR reactor 4, but before the high-temperature dust collector 3, the ammonia gas will be absorbed by the dust on the metal filter bag 31 when flowing through the metal filter bag 31, and when the dust falls off the metal filter bag 31, it will contact with the rising ammonia gas and be absorbed again, so the ammonia gas will be lost to a certain extent, which will affect the catalytic effect of the subsequent SCR reactor 4 and is not conducive to the accurate control of ammonia gas.

[0050] To solve the above problems, an ultrasonic oscillator 33 is arranged in the ash hopper 32, which drives the dust in the ash hopper 32 to vibrate when working, so that the ammonia gas adsorbed by the dust can be separated and flow back to the metal filter bag 31 and then into the SCR reactor 4, thereby greatly improving the catalytic effect of the SCR reactor 4 and facilitating accurate control of the injection amount of ammonia gas. Of course, the dust in the ash hopper 32 can also be heated to make the ammonia gas adsorbed by the dust separate, but this will cause additional energy consumption. In other embodiments, a device for separating ammonia gas from dust can be arranged outside the high-temperature dust collector 3, and the dust in the ash hopper 32 is transported to the device by a bin pump 34. The ultrasonic oscillator 33 or a heater can be arranged in the device to separate the ammonia gas from the dust, and the separated ammonia gas is introduced back into the high-temperature dust collector 3. The ultrasonic oscillator 33 can also use other vibration devices, such as mechanical, pneumatic or hydraulic vibrators.

[0051] Embodiment three: the difference between embodiment three and embodiment one is that, referring to Figure 1 , a backflow device is arranged between the original flue 1 and the clean flue 5; the backflow device backflows the flue gas in the clean flue 5 to the original flue 1; wherein the backflow device includes a backflow flue 6 connected between the original flue 1 and the clean flue 5 and a backflow fan 8 installed on the backflow flue 6; in this way, the clean flue gas is backflowed to the front end when the boiler is at low load, ensuring the minimum flow rate of the flue gas at the inlet of the SCR reactor, meeting the flow rate deviation rate ≤10% at the inlet of the SCR reactor, so that the SCR reactor is always in a stable operating state within the load range of 30%-100%, ensuring its catalytic efficiency.

[0052] Embodiment four: the difference between embodiment four and embodiment one is that, referring to Figures 4-6 , the metal filter bag 31 includes a connecting flange 311 at the upper end, a stainless steel filter layer 312 fixed on the lower end surface of the connecting flange 311, a stainless steel support net 313 for preventing the stainless steel filter layer 312, and an expansion piece 314 arranged between the stainless steel filter layer 312 and the stainless steel support net 313; the stainless steel filter layer 312 is composed of stainless steel fibers; the upper end of the stainless steel filter layer 312 is open, and the lower end is sealed.

[0053] Referring to Figures 4-6, the expansion piece 314 comprises a wind scooping ring 3141, a plurality of driving rods 3142 evenly distributed in the circumference and fixed on the lower end surface of the wind scooping ring 3141, a plurality of outer supporting sleeves 3144 sleeved on the driving rods 3142 and a supporting bottom ring 3145 fixed on the bottom of all the outer supporting sleeves 3144; the supporting bottom ring 3145 abuts against the bottom of the stainless steel filter layer 312; the outer supporting sleeve 3144 comprises a sleeve base 3148 fixedly connected with the supporting bottom ring 3145, a plurality of supporting ring parts axially distributed along the driving rod 3142 and a plurality of metal elastic sheets 3143; the supporting ring part comprises a lower connecting part 3147 and an upper main body sleeve 3146 in the shape of a circular column; the lowermost connecting part 3147 is connected with the sleeve base 3148, and the rest of the connecting parts 3147 are connected with the adjacent main body sleeves 3146 in the lower side; the upper end of the lowermost metal elastic sheet 3143 is fixedly connected with the driving rod 3142, and the lower end is fixedly connected with the supporting bottom ring 3145; the upper end of the rest of the metal elastic sheets 3143 is fixedly connected with the driving rod 3142, and the lower end is fixedly connected with the main body sleeve 3146; in order to improve the expansion effect of the metal elastic sheet 3143, the middle part of the metal elastic sheet 3143 is in the shape of a circular arc and is radially inwardly opened.

[0054] In work, the wind scooping ring 3141 scoops the compressed air sprayed by the spraying assembly 35, thereby driving all the driving rods 3142 to descend; in this process, the upper end of the metal elastic sheet 3143 descends along with the driving rod 3142, the metal elastic sheet 3143 is bent, thereby pushing open the stainless steel filter layer 312, so that the dust adhered on the stainless steel filter layer 312 is more easily separated, then the metal elastic sheet 3143 resets after the spraying assembly 35 stops spraying the compressed air, so that the wind scooping ring 3141 and all the driving rods 3142 jointly ascend back to the original position. Through the intermittent bending of the metal elastic sheet 3143, the stainless steel filter layer 312 is intermittently expanded, and in combination with the spraying of the compressed air, the cleaning effect of the metal filter bag 31 is better.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An AI-based dynamic control integrated dust and nitrogen oxide treatment system for biomass boilers, used to treat flue gas after biomass combustion; Its features are: include: The dust collector (2) includes a horizontally distributed high-temperature dust collector (3) and an SCR reactor (4). The high-temperature dust collector (3) and the SCR reactor (4) are arranged on the same wall and the flue gas flows through the high-temperature dust collector (3) and the SCR reactor (4) in sequence. The high-temperature dust collector (3) has a flue gas inlet and the SCR reactor (4) has a flue gas outlet. The original flue (1) is connected to the flue gas inlet; Clean flue (5) is connected to the smoke outlet; The high-temperature dust collector (3) includes several horizontally and evenly distributed metal filter bags (31); a jet blowing assembly (35) is provided on the top of the high-temperature dust collector (3); the jet blowing assembly (35) is used to simultaneously spray compressed air onto all the metal filter bags (31). The metal filter bag (31) includes a stainless steel filter layer (312) and an expansion member (314) disposed in the stainless steel filter layer (312); the expansion member (314) includes a baffle ring (3141), a number of drive rods (3142) fixed on the lower end face of the baffle ring (3141) and a number of outer support sleeves (3144) sleeved on the drive rods (3142); a number of metal springs (3143) are connected between the drive rods (3142) and the outer support sleeves (3144); the baffle ring (3141) and the drive rods (3142) drive the metal springs (3143) to bend under the action of compressed air to push open the stainless steel filter layer (312).

2. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 1, characterized in that: The outer side of the dust and nitrification integrated device (2) is covered with a heat insulation layer.

3. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 1, characterized in that: The high-temperature dust collector (3) and the SCR reactor (4) have a communication port (200) at the upper end of their common wall to connect the two.

4. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 3, characterized in that: The connection port (200) is located on one side of the SCR reactor (4) and is provided with a flue gas guiding component (41).

5. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 4, characterized in that: The flue gas guiding assembly (41) includes several flue gas guiding plates (42) that are parallel to each other and equidistant from each other; the flue gas guiding plates (42) are inclined and inclined downward along the direction away from the high temperature dust collector (3).

6. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 1, characterized in that: The original flue (1) is equipped with an ammonia injection grid (7); the ammonia injection grid (7) is used to uniformly inject ammonia gas.

7. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 6, characterized in that: The high-temperature dust collector (3) is equipped with a dust hopper (32) at its bottom.

8. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 7, characterized in that: An ultrasonic oscillator (33) is installed inside the ash hopper (32).

9. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 7, characterized in that: The blowing frequency and blowing pressure of the blowing assembly (35) are changed in real time according to the differential pressure between the inlet and outlet of the metal filter bag (31).

10. The integrated dust and nitrogen oxide treatment system for biomass boilers based on AI dynamic control according to claim 1, characterized in that: A return device is provided between the original flue (1) and the clean flue (5); the return device returns the flue gas in the clean flue (5) to the original flue (1).

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