Medium-temperature desulfurization, dust removal and denitration integrated device for biomass boiler
Through the integrated device of medium-temperature desulfurization, dust removal and denitrification of biomass boilers, high-temperature dust collectors and bag dust collectors are used to remove SO2 and particulate matter in the flue gas, and the ammonia evaporator is used to remove NOX in the denitrification area, which solves the harmful substances in the flue gas of the biomass boiler Eliminate difficulties and achieve ultra-low emissions and stable operation of equipment.
Patent Information
- Application Number
- CN202421015417.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The flue gas generated during the operation of the biomass boiler contains SO2, NOX and particulate matter. The prior art is difficult to effectively remove these harmful substances, and there is a risk of equipment failure and cannot meet the ultra-low emission requirements.
Design an integrated device for medium-temperature desulfurization and dust removal of biomass boilers. SO2 is removed by spraying special desulfurization agent into high-temperature dust collectors, and treating particulate matter in combination with bag dust collectors, and using ammonia evaporator and ammonia spray grille to remove NOX in the denitrification area , form an integrated structure.
It realizes effective removal of SO2, NOX and particulate matter in the flue gas, meets the national ultra-low emission requirements, and prevents equipment failures when containing heavy metals and biomass oil, ensuring long-term stable operation.
Smart Images
Figure CN222239619U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of biomass boilers, and more specifically, to a medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler. Background Art
[0002] A biomass boiler is a device that uses biomass as fuel for heat conversion. Biomass refers to organic matter from plants or animals, such as wood, straw, waste, etc. At present, the technology of biomass boilers is relatively mature and can meet the heat supply of different scales and needs, including household heating, industrial production, etc. During the operation of biomass boilers, a large amount of flue gas is generated. The flue gas contains harmful substances such as SO2, NOX, and particulate matter, which need to be purified before it can meet the national emission requirements;
[0003] During the operation of existing biomass boilers, a large amount of flue gas is generated. The flue gas contains harmful substances such as SO2, NOX, and particulate matter. Therefore, it is necessary to set the device as an integrated desulfurization, dust removal, and denitrification device for biomass boilers. The flue gas outlet of the biomass boiler is connected to a high-temperature dust collector, and a special desulfurizer is sprayed at the inlet of the bag filter to remove the SO2 in the flue gas in the flue and the dust collector. The particulate matter in the flue gas is centrally treated through the dust collector area. After passing through the dust collector area, the flue gas enters the denitrification area, and the denitrification agent is sprayed. In the denitrification area, NOX in the flue gas is removed. After the flue gas of the biomass boiler passes through the integrated desulfurization, dust removal, and denitrification device, a large amount of harmful substances such as SO2, NOX, and particulate matter in the flue gas can be removed. Moreover, this device can effectively prevent equipment failures in cases where the biomass boiler contains heavy metals and biomass oil, and can operate stably for a long time;
[0004] Therefore, in order to solve the above problems, a medium-temperature desulfurization, dust removal and denitrification integrated device for biomass boiler is proposed. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides an integrated device for medium-temperature desulfurization, dust removal and denitrification of a biomass boiler to solve the problems raised in the above-mentioned background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler, comprising a desulfurization reaction box, an air intake pipe is fixedly connected to the left side of the desulfurization reaction box, a desulfurizer storage box is fixedly connected to the top of the desulfurization reaction box, a feed pipe is fixedly connected to the top of the desulfurizer storage box, a discharge pipe is fixedly connected to the bottom of the desulfurizer storage box, a solenoid valve is fixedly connected to the middle part of the discharge pipe, a sealing baffle is fixedly connected to the inner wall of the desulfurization reaction box, and a blower is fixedly connected to the top of the sealing baffle.
[0007] Preferably, a fixing plate is fixedly connected to the inner upper wall of the desulfurization reaction box, a delivery pipeline is fixedly connected to the output end of the blower, a spray head is fixedly connected to one end of the delivery pipeline, and an air inlet groove is opened above the desulfurization reaction box.
[0008] Preferably, a connecting pipe is fixedly connected to the right side of the desulfurization reaction box, a bag filter is arranged on the right side of the desulfurization reaction box, and the connecting pipe is fixedly connected to the input end of the bag filter, and a denitrification reaction box is fixedly connected to the right side of the bag filter.
[0009] Preferably, an ammonia evaporator is fixedly connected above the denitration reaction box, an ammonia tank is fixedly connected above the ammonia evaporator, and the output end of the ammonia evaporator passes through the upper wall of the denitration reaction box, and an ammonia spray grid is fixedly connected to the inner wall of the denitration reaction box.
[0010] Preferably, an air outlet pipe is fixedly connected to the right side of the denitration reaction box, a flue gas transmission pipe is fixedly connected above the air outlet pipe, and one end of the flue gas transmission pipe is fixedly connected to the ammonia evaporator.
[0011] Preferably, a support plate fixedly connected to the right side of the denitration reaction box is provided below the outlet pipe, a low-temperature air preheater is fixedly connected above the support plate, and one end of the outlet pipe is fixedly connected to the low-temperature air preheater.
[0012] Preferably, an exhaust duct is fixedly connected to one side of the low-temperature air preheater, and an exhaust fan is fixedly connected to the inner wall of the exhaust duct.
[0013] Preferably, a display screen is fixedly connected to the front of the bag-type dust collector, a controller fixedly connected to the front of the bag-type dust collector is arranged below the display screen, and a support is fixedly connected to the bottom of the desulfurization reaction box.
[0014] Technical effects and advantages of the utility model:
[0015] Compared with the existing technology, the medium-temperature desulfurization, dust removal and denitrification integrated device of the biomass boiler integrates desulfurization, dust removal and denitrification into an integrated structure, connects the flue gas outlet of the biomass boiler to the high-temperature dust collector, and sprays a special desulfurizer at the inlet of the bag filter, so that the SO2 in the flue gas is removed in the flue and the dust collector, and the particulate matter in the flue gas is centrally treated through the dust collector area. After the flue gas passes through the dust collector area, it enters the denitrification area and is sprayed with a denitrifier. In the denitrification area, NOX in the flue gas is removed. After the flue gas of the biomass boiler passes through the integrated desulfurization, dust removal and denitrification device, a large amount of harmful substances such as SO2, NOX, and particulate matter in the flue gas can be removed, meeting the country's ultra-low emission requirements. Moreover, this device can effectively prevent equipment failures in the case of heavy metals, biomass oil, etc. in the biomass boiler, and can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the internal structure of the utility model.
[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.
[0018] Figure 3 This is a schematic diagram of the desulfurizer spraying structure of the utility model.
[0019] Figure 4 This is a schematic diagram of the structure of the bag dust collector of the utility model.
[0020] The accompanying drawings are marked as follows: 1. desulfurization reaction box; 2. air intake pipe; 3. desulfurizer storage box; 4. feed pipe; 5. discharge pipe; 6. solenoid valve; 7. sealing baffle; 8. blower; 9. fixing plate; 10. conveying pipeline; 11. spray head; 12. air intake groove; 13. connecting pipe; 14. bag filter; 15. denitrification reaction box; 16. ammonia evaporator; 17. ammonia tank; 18. ammonia spray grid; 19. outlet pipe; 20. flue gas transmission pipe; 21. support plate; 22. low-temperature air preheater; 23. exhaust pipe; 24. exhaust fan; 25. display screen; 26. controller; 27. pillar. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] Embodiment 1
[0023] As attached Figure 1 and Figure 4 The shown device is an integrated medium-temperature desulfurization, dust removal and denitrification device for a biomass boiler, comprising a desulfurization reaction box 1, an air intake pipe 2 fixedly connected to the left side of the desulfurization reaction box 1, a desulfurizer storage box 3 fixedly connected to the top of the desulfurization reaction box 1, a feed pipe 4 fixedly connected to the top of the desulfurizer storage box 3, a discharge pipe 5 fixedly connected to the bottom of the desulfurizer storage box 3, a solenoid valve 6 fixedly connected to the middle part of the discharge pipe 5, a sealing baffle 7 fixedly connected to the inner wall of the desulfurization reaction box 1, a blower 8 fixedly connected to the top of the sealing baffle 7, a fixed plate 9 fixedly connected to the upper wall of the interior of the desulfurization reaction box 1, a conveying pipe 10 fixedly connected to the output end of the blower 8, a spray head 11 fixedly connected to one end of the conveying pipe 10, and an air intake groove 12 is provided above the desulfurization reaction box 1.
[0024] Among them: when performing flue gas desulfurization, first add the powdered desulfurizer into the desulfurizer storage box 3 through the feed pipe 4, then open the solenoid valve 6, at this time the desulfurizer will move to the inside of the conveying pipe 10 through the discharge pipe 5, and then start the blower 8 to operate, at this time the blower 8 can transfer the desulfurizer through the conveying pipe 10 to the spray head 11, and finally spray the desulfurizer through the spray head 11, and the flue gas discharged into the desulfurization reaction box 1 through the air intake pipe 2 will be fully mixed with the desulfurizer to remove SO2 in the flue gas.
[0025] Embodiment 2
[0026] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods. Figures 1 to 4 As shown, see the following description for details:
[0027] As a preferred embodiment, a connecting pipe 13 is fixedly connected to the right side of the desulfurization reaction box 1, a bag dust collector 14 is arranged on the right side of the desulfurization reaction box 1, and the connecting pipe 13 is fixedly connected to the input end of the bag dust collector 14, and a denitrification reaction box 15 is fixedly connected to the right side of the bag dust collector 14; further, the gas treated by the desulfurization reaction box 1 will be discharged to the interior of the bag dust collector 14 through the connecting pipe 13, and then the particulate matter in the flue gas will be centrally treated by the bag dust collector 14, and the treated flue gas will be discharged to the interior of the denitrification reaction box 15 through the dust collector area.
[0028] As a preferred embodiment, an ammonia evaporator 16 is fixedly connected above the denitration reaction box 15, an ammonia tank 17 is fixedly connected above the ammonia evaporator 16, and the output end of the ammonia evaporator 16 passes through the upper wall of the denitration reaction box 15, an ammonia spray grid 18 is fixedly connected to the inner wall of the denitration reaction box 15, an outlet pipe 19 is fixedly connected to the right side of the denitration reaction box 15, a flue gas transmission pipe 20 is fixedly connected above the outlet pipe 19, and one end of the flue gas transmission pipe 20 is fixedly connected to the ammonia evaporator 16; further, the ammonia water inside the ammonia tank 17 is discharged to the inside of the ammonia evaporator 16, and then the ammonia evaporator 16 cooperates with the ammonia spray grid 18 to evenly spray the ammonia water into the inside of the denitration reaction box 15, so that it reacts chemically with the nitrogen oxides in the flue gas, thereby converting them into harmless nitrogen and water, and the reacted gas will be discharged through the outlet pipe 19, and at the same time, the gas in this part will be transmitted to the inside of the ammonia evaporator 16 through the flue gas transmission pipe 20 again, so as to be recycled.
[0029] As a preferred embodiment, a support plate 21 fixedly connected to the right side of the denitrification reaction box 15 is provided below the exhaust pipe 19, a low-temperature air preheater 22 is fixedly connected above the support plate 21, and one end of the exhaust pipe 19 is fixedly connected to the low-temperature air preheater 22, an exhaust duct 23 is fixedly connected to one side of the low-temperature air preheater 22, an exhaust fan 24 is fixedly connected to the inner wall of the exhaust duct 23, a display screen 25 is fixedly connected to the front of the bag-type dust collector 14, a controller 26 fixedly connected to the front of the bag-type dust collector 14 is provided below the display screen 25, and a pillar 27 is fixedly connected to the bottom of the desulfurization reaction box 1; further, the exhaust fan 24 is started, and the treated flue gas will be discharged to the interior of the low-temperature air preheater 22 through the exhaust pipe 19, and the gas cooled by the low-temperature air preheater 22 will be finally discharged through the exhaust duct 23.
[0030] The working process of the utility model is as follows:
[0031] When the flue gas treatment is performed, the powdered desulfurizer is first added to the interior of the desulfurizer storage box 3 through the feed pipe 4, and then the solenoid valve 6 is opened. At this time, the desulfurizer will move to the interior of the conveying pipe 10 through the discharge pipe 5, and then the blower 8 is started. At this time, the blower 8 can transmit the desulfurizer to the spray head 11 through the conveying pipe 10, and finally the desulfurizer is sprayed through the spray head 11. The flue gas discharged into the desulfurization reaction box 1 through the air intake pipe 2 will be fully mixed with the desulfurizer to remove SO2 in the flue gas. The treated flue gas will be discharged to the interior of the bag filter 14 through the connecting pipe 13, and then the bag filter 14 will be discharged to the interior of the bag filter 14. The dust collector 14 centrally processes the particulate matter in the flue gas. The treated flue gas will be discharged to the inside of the denitrification reaction box 15 through the dust collector area. Then the flue gas in this area will be mixed with the ammonia water sprayed by the ammonia spray grid 18 to convert it into harmless nitrogen and water. After the denitrification work is completed, the exhaust fan 24 is started. At this time, the treated flue gas will be discharged to the inside of the low-temperature air preheater 22 through the outlet pipe 19. The gas cooled by the low-temperature air preheater 22 is finally discharged through the exhaust pipe 23. After the flue gas passes through the integrated desulfurization, dust removal and denitrification device, a large amount of harmful substances such as SO2, NOX, particulate matter, etc. in the flue gas can be removed to meet the national ultra-low emission requirements. In addition, this device can effectively prevent equipment failures in the case of heavy metals and biomass oil in biomass boilers, and can operate stably for a long time.
[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler, comprising a desulfurization reaction box (1), characterized in that: The left side of the desulfurization reaction box (1) is fixedly connected to an air intake pipe (2); the top of the desulfurization reaction box (1) is fixedly connected to a desulfurization agent storage box (3); the top of the desulfurization agent storage box (3) is fixedly connected to a feed pipe (4); the bottom of the desulfurization agent storage box (3) is fixedly connected to a discharge pipe (5); the middle part of the discharge pipe (5) is fixedly connected to a solenoid valve (6); the inner wall of the desulfurization reaction box (1) is fixedly connected to a sealing baffle (7); and the top of the sealing baffle (7) is fixedly connected to a blower (8).
2. The medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler according to claim 1 is characterized in that: A fixing plate (9) is fixedly connected to the inner upper wall of the desulfurization reaction box (1), a delivery pipe (10) is fixedly connected to the output end of the blower (8), a spray head (11) is fixedly connected to one end of the delivery pipe (10), and an air inlet groove (12) is opened above the desulfurization reaction box (1).
3. The integrated device for medium-temperature desulfurization, dust removal and denitrification of a biomass boiler according to claim 1 is characterized in that: A connecting pipe (13) is fixedly connected to the right side of the desulfurization reaction box (1), a bag dust collector (14) is arranged on the right side of the desulfurization reaction box (1), and the connecting pipe (13) is fixedly connected to the input end of the bag dust collector (14), and a denitration reaction box (15) is fixedly connected to the right side of the bag dust collector (14).
4. The medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler according to claim 3 is characterized in that: An ammonia water evaporator (16) is fixedly connected above the denitration reaction box (15), an ammonia water tank (17) is fixedly connected above the ammonia water evaporator (16), and an output end of the ammonia water evaporator (16) penetrates the upper wall of the denitration reaction box (15), and an ammonia spray grid (18) is fixedly connected to the inner wall of the denitration reaction box (15).
5. The integrated device for medium-temperature desulfurization, dust removal and denitrification of a biomass boiler according to claim 4 is characterized in that: The right side of the denitration reaction box (15) is fixedly connected to an air outlet pipe (19), the upper part of the air outlet pipe (19) is fixedly connected to a flue gas transmission pipe (20), and one end of the flue gas transmission pipe (20) is fixedly connected to the ammonia evaporator (16).
6. The medium-temperature desulfurization, dust removal and denitrification integrated device for a biomass boiler according to claim 5, characterized in that: A support plate (21) fixedly connected to the right side of the denitration reaction box (15) is provided below the gas outlet pipe (19), a low-temperature air preheater (22) is fixedly connected above the support plate (21), and one end of the gas outlet pipe (19) is fixedly connected to the low-temperature air preheater (22).
7. The integrated device for medium-temperature desulfurization, dust removal and denitrification of a biomass boiler according to claim 6 is characterized in that: An exhaust duct (23) is fixedly connected to one side of the low-temperature air preheater (22), and an exhaust fan (24) is fixedly connected to the inner wall of the exhaust duct (23).
8. The integrated device for medium-temperature desulfurization, dust removal and denitrification of a biomass boiler according to claim 3 is characterized in that: A display screen (25) is fixedly connected to the front of the bag filter (14), a controller (26) fixedly connected to the front of the bag filter (14) is arranged below the display screen (25), and a support (27) is fixedly connected to the bottom of the desulfurization reaction box (1).