Fluidized bed furnace flue gas recovery device
By designing a boiling furnace flue gas recovery device, using treatment steps such as cooling, dust removal, spray desulfurization and denitrification, the problem of harmful substance emissions in the traditional boiling furnace flue gas is solved, and the effective removal of flue gas and the improvement of environmental protection performance is achieved.
Patent Information
- Application Number
- CN202422199529.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-09
AI Technical Summary
When traditional boiling furnaces emit flue gas, the particulate fuel carried in the flue gas is directly discharged to the outside world. The untreated flue gas contains high concentrations of sulfur oxides, nitrogen oxides and particulate matter, which has a serious impact on air quality.
A boiling furnace flue gas recovery device is designed, including a treatment box, a cold water tank, a dust removal chamber, a treatment chamber, a reflow assembly, etc., through the treatment steps such as cooling, dust removal, spray desulfurization and denitrification, the harmful substances in the flue gas are removed, and the treated flue gas is recovered through the reflow assembly.
Effectively remove sulfur dioxide and nitrogen oxides in flue gas, reduce environmental pollution, improve the energy efficiency and environmental protection performance of boiling furnaces, and reduce energy consumption by recycling flue gas and heat.
Smart Images
Figure CN223010108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas recovery device for a fluidized bed boiler. Background Art
[0002] A fluidized bed boiler is a coal-fired boiler developed in recent years. It can not only burn high-quality coal, but also burn various low-quality coals that cannot be burned by general grate furnaces and chamber furnaces, and has good combustion effect and high thermal efficiency.
[0003] Flue gas is a mixture of gas and dust, and is the main cause of polluting the atmosphere in residential areas. The composition of flue gas is very complex. The gas includes water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, etc.
[0004] When traditional fluidized bed boilers discharge flue gas, the particulate fuel carried in the flue gas is directly discharged to the outside. The untreated flue gas contains high concentrations of sulfur oxides, nitrogen oxides and particulate matter, which seriously affects air quality. Content of the Utility Model
[0005] In order to make up for the above deficiencies, the utility model provides a flue gas recovery device for a fluidized bed boiler, aiming to improve the problem that when the fluidized bed boiler discharges flue gas, the particulate fuel carried in the flue gas is directly discharged to the outside, and the untreated flue gas contains high concentrations of sulfur oxides, nitrogen oxides and particulate matter, which seriously affects air quality.
[0006] To achieve the above object, the utility model provides the following technical solution: A flue gas recovery device for a fluidized bed boiler, including a treatment tank, a cold water tank is fixedly connected to the left side of the treatment tank, an air inlet pipe is arranged inside the cold water tank, the bottom end of the air inlet pipe is arranged inside the treatment tank, a dust removal chamber is opened inside the treatment tank, a partition board is arranged on the inner side of the dust removal chamber, a mounting plate is fixedly connected to the inner side of the dust removal chamber, cloth bags are fixedly connected to the inner sides of the mounting plates, a treatment chamber is opened inside the treatment tank, a conveying pipe is arranged on the right side of the dust removal chamber, the right end of the conveying pipe is arranged inside the treatment chamber, a first connecting pipe is fixedly connected to the inner top of the treatment chamber, a second solenoid valve is arranged outside the first connecting pipe, a second connecting pipe is fixedly connected to the inner top of the treatment chamber, a third solenoid valve is arranged outside the second connecting pipe, spray heads are arranged outside both the first connecting pipe and the second connecting pipe, a reflux assembly is fixedly connected to the top of the treatment tank, and the reflux assembly is used for recycling the treated flue gas.
[0007] Further, the reflux assembly includes a diversion tank fixedly connected to the top of the processing tank. A carbon fiber filter plate is arranged inside the diversion tank, and a ceramic filter plate is also arranged inside the diversion tank. The top end of the diversion tank is fixedly connected to a reflux pipe, and the other end of the reflux pipe is fixedly connected to a gas tank.
[0008] Further, the gas tank is fixedly connected to the top of the processing tank, and air pipes are fixedly connected to the outside of the gas tank. The air pipes penetrate through the processing tank and are arranged at the inner top of the dust removal chamber.
[0009] Further, first solenoid valves are arranged on the outside of the air pipes, and jet nozzles are arranged on the outside of the air pipes.
[0010] Further, a dust discharge pipe is arranged at the bottom of the dust removal chamber, and the dust discharge pipe is fixedly connected to the bottom of the processing tank.
[0011] Further, a waste discharge pipe is arranged at the bottom of the processing chamber, and the waste discharge pipe is fixedly connected to the bottom of the processing tank.
[0012] Further, a water outlet pipe is fixedly connected to the bottom of the cold water tank, and a valve is arranged on the outside of the water outlet pipe.
[0013] Further, a controller is fixedly connected to the front side of the processing tank.
[0014] The utility model has the following beneficial effects:
[0015] 1. In the utility model, the flue gas enters from the intake pipe and exchanges heat with the cold water in the cold water tank during the entry process, cooling the flue gas and heating the cold water at the same time. The cooled flue gas enters the interior of the processing tank and is filtered by the cloth bag inside the dust removal chamber and then discharged into the interior of the processing chamber through the conveying pipe, reducing the temperature and removing solid particles to protect the subsequent equipment. The flue gas after cooling and dust removal enters the processing chamber, and the flue gas undergoes spray desulfurization and denitrification inside the processing chamber. After the spray treatment, the ceramic filter plate and the carbon fiber filter plate are used to further filter the fine impurities and other substances in the flue gas. After the spray treatment, harmful gases such as sulfur dioxide and nitrogen oxides are removed, effectively removing harmful substances, reducing environmental pollution, and improving the energy efficiency and environmental protection performance of the fluidized bed boiler.
[0016] 2. In the present utility model, the flue gas carrying heat passes through the cold water tank, and the cold water tank cools the flue gas. During the heat exchange process between the cold water tank and the flue gas, the heated cold water can be concentrated and discharged through the outlet pipe for use, thereby utilizing the heat and reducing waste of resources. The treated flue gas enters the interior of the gas tank through the return pipe. At the same time, the first solenoid valve is opened to transport the gas stored inside the gas tank through the gas pipe and finally discharged through the jet head. The discharged gas directly acts on the cloth bag, thereby treating the dust on the cloth bag. The treated dust will fall into the ash discharge pipe at the bottom of the treatment tank and finally be discharged from the ash discharge pipe. Description of the Drawings
[0017] Figure 1 Is a perspective view of a flue gas recovery device for a fluidized bed furnace proposed by the present utility model;
[0018] Figure 2 Is a top view of a flue gas recovery device for a fluidized bed furnace proposed by the present utility model;
[0019] Figure 3 Is a sectional view of the structure of the treatment tank of a flue gas recovery device for a fluidized bed furnace proposed by the present utility model;
[0020] Figure 4 Is Figure 3 The enlarged view at position A in
[0021] Figure 5 Is a sectional view of the structure of the diversion tank of a flue gas recovery device for a fluidized bed furnace proposed by the present utility model.
[0022] Legend Explanation:
[0023] 1. Treatment tank; 2. Inlet gas pipe; 3. Cold water tank; 4. Outlet pipe; 5. Valve; 6. Dust removal chamber; 7. Partition board; 8. Mounting plate; 9. Cloth bag; 10. Ash discharge pipe; 11. Gas tank; 12. Gas pipe; 13. First solenoid valve; 14. Jet head; 15. Delivery pipe; 16. Treatment chamber; 17. First connecting pipe; 18. Second solenoid valve; 19. Second connecting pipe; 20. Third solenoid valve; 21. Spray head; 22. Waste discharge pipe; 23. Diversion tank; 24. Carbon fiber filter plate; 25. Ceramic filter plate; 26. Return pipe; 27. Controller. Detailed Embodiment
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0025] Reference Figure 2 、 Figure 4 and Figure 5 , an embodiment provided by the utility model: a flue gas recovery device for a fluidized bed furnace, comprising a treatment tank 1, a cold water tank 3 is fixedly connected to the left side of the treatment tank 1, an intake pipe 2 is arranged inside the cold water tank 3, the bottom end of the intake pipe 2 is arranged inside the treatment tank 1, a dust removal chamber 6 is formed inside the treatment tank 1, a partition plate 7 is arranged inside the dust removal chamber 6, a mounting plate 8 is fixedly connected to the inside of the dust removal chamber 6, filter bags 9 are fixedly connected to the inside of the mounting plate 8, a treatment chamber 16 is formed inside the treatment tank 1, a conveying pipe 15 is arranged on the right side of the dust removal chamber 6, the right end of the conveying pipe 15 is arranged inside the treatment chamber 16, a first connecting pipe 17 is fixedly connected to the inner top of the treatment chamber 16, a second solenoid valve 18 is arranged outside the first connecting pipe 17, a second connecting pipe 19 is fixedly connected to the inner top of the treatment chamber 16, a third solenoid valve 20 is arranged outside the second connecting pipe 19, spray heads 21 are arranged outside both the first connecting pipe 17 and the second connecting pipe 19, a reflux assembly is fixedly connected to the top of the treatment tank 1, the reflux assembly is used for recycling the treated flue gas, the reflux assembly comprises a diversion tank 23, the diversion tank 23 is fixedly connected to the top of the treatment tank 1, a carbon fiber filter plate 24 is arranged inside the diversion tank 23, a ceramic filter plate 25 is arranged inside the diversion tank 23, a reflux pipe 26 is fixedly connected to the top end of the diversion tank 23, and the other end of the reflux pipe 26 is fixedly connected to a gas tank 11.
[0026] The flue gas enters from the intake pipe 2, and exchanges heat with the cold water in the cold water tank 3 during the entry process, and the flue gas is cooled by the cold water tank 3. During the heat exchange process between the cold water tank 3 and the flue gas, the heated cold water can be concentrated and discharged through the water outlet pipe 4 for use. The partition plate 7 prevents the flue gas from directly contacting the filter bags 9, thereby effectively avoiding the particles with a certain speed in the flue gas from directly acting on the filter bags 9 and affecting the service life of the filter bags 9. The mounting plate 8 is used for mounting the filter bags 9, and the filter bags 9 are used for collecting and filtering impurity particles. The cooled flue gas enters the inside of the treatment tank 1 and is filtered by the filter bags 9 inside the dust removal chamber 6, and then is discharged into the inside of the treatment chamber 16 through the conveying pipe 15. The first connecting pipe 17 is used for connecting the ammonia water pipeline, and then the ammonia water is sprayed out through the spray heads 21 to desulfurize the flue gas. The second solenoid valve 18 is used to control the opening and closing of the first connecting pipe 17, and the third solenoid valve 20 is used to control the opening and closing of the second connecting pipe 19. The second connecting pipe 19 is used for connecting the denitrification treatment liquid pipeline and performing denitrification treatment through the spray heads 21. The flue gas after desulfurization and denitrification enters the inside of the diversion tank 23, and the ceramic filter plate 25 and the carbon fiber filter plate 24 are used for further filtering the fine impurities and other substances in the flue gas. The flue gas passing through the filtering treatment enters the inside of the gas tank 11 through the reflux pipe 26.
[0027] Reference Figure 1 、Figure 3 and Figure 4 The gas tank 11 is fixedly connected to the top of the processing box 1. An air pipe 12 is fixedly connected to the outside of the gas tank 11. The air pipe 12 penetrates through the processing box 1 and is arranged at the inner top of the dust removal chamber 6. A first electromagnetic valve 13 is arranged on the outside of the air pipe 12. A jet head 14 is arranged on the outside of the air pipe 12. A dust discharge pipe 10 is arranged at the bottom of the dust removal chamber 6. The dust discharge pipe 10 is fixedly connected to the bottom of the processing box 1.
[0028] At the same time, the first electromagnetic valve 13 is opened to send the gas stored inside the gas tank 11 out through the air pipe 12, and finally discharged through the jet head 14. The ejected gas directly acts on the cloth bag 9, thereby treating the dust on the cloth bag 9. The treated dust will fall into the dust discharge pipe 10 at the bottom of the processing box 1 and is finally discharged from the dust discharge pipe 10. By recycling the flue gas, the energy consumption is reduced.
[0029] Refer to Figure 1 and Figure 3 The bottom of the treatment chamber 16 is provided with a waste discharge pipe 22. The waste discharge pipe 22 is fixedly connected to the bottom of the processing box 1. A water outlet pipe 4 is fixedly connected to the bottom of the cold water tank 3. A valve 5 is arranged on the outside of the water outlet pipe 4. A controller 27 is fixedly connected to the front side of the processing box 1.
[0030] The waste discharge pipe 22 is used to discharge the waste liquid and by-products generated by desulfurization and denitrification. The water outlet pipe 4 is used to collect and utilize the heated cold water, thereby utilizing the heat and reducing the waste of resources. The valve 5 is used to control the opening and closing of the water outlet pipe 4. The water outlet pipe 4 can be connected to a shower room, a cafeteria, a laundry room, etc. for use. The controller 27 is used to control the driving of the overall device.
[0031] Working principle: When using this device, the flue gas enters from the intake pipe 2 and undergoes heat exchange with the cold water in the cold water tank 3 during the entry process, cooling the flue gas while heating up the cold water. The flue gas carrying heat passes through the cold water tank 3, and the cold water tank 3 cools the flue gas. During the heat exchange process between the cold water tank 3 and the flue gas, the heated cold water can be concentrated and discharged through the outlet pipe 4 for use, thereby utilizing the heat and reducing waste of resources. The cooled flue gas enters the interior of the treatment tank 1 and is filtered by the cloth bag 9 inside the dust removal chamber 6, and then is discharged into the interior of the treatment chamber 16 through the conveying pipe 15. By reducing the temperature and removing solid particles, subsequent equipment is protected. The flue gas after cooling and dust removal enters the treatment chamber 16, and the flue gas undergoes spray desulfurization and denitrification inside the treatment chamber 16. After the spray treatment, the fine impurities and other substances in the flue gas are further filtered through the ceramic filter plate 25 and the carbon fiber filter plate 24. After the spray treatment, harmful gases such as sulfur dioxide and nitrogen oxides are removed, effectively removing harmful substances and reducing environmental pollution, improving the energy efficiency and environmental protection performance of the fluidized bed boiler. The flue gas passing through the filtration treatment enters the interior of the gas tank 11 through the return pipe 26. At the same time, the first solenoid valve 13 is opened to transport the gas stored inside the gas tank 11 through the gas pipe 12, and finally discharged through the jet head 14. The ejected gas directly acts on the cloth bag 9, and then the dust on the cloth bag 9 is treated. The treated dust will fall into the ash discharge pipe 10 at the bottom of the treatment tank 1 and is finally discharged from the ash discharge pipe 10. By recycling the flue gas and heat, energy consumption is reduced.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A fluidized bed furnace fume recovery device, comprising a treatment box (1), characterized in that: The left side of the treatment box (1) is fixedly connected to a cold water tank (3), an air intake pipe (2) is arranged inside the cold water tank (3), the bottom end of the air intake pipe (2) is arranged inside the treatment box (1), a dust removal chamber (6) is provided inside the treatment box (1), a partition plate (7) is arranged inside the dust removal chamber (6), a mounting plate (8) is fixedly connected to the inside of the dust removal chamber (6), a cloth bag (9) is fixedly connected to the inside of the mounting plate (8), a treatment chamber (16) is provided inside the treatment box (1), a conveying pipe (15) is arranged on the right side of the dust removal chamber (6), and the conveying pipe ( The right end of the valve 15 is arranged on the inner side of the treatment chamber (16), the inner top of the treatment chamber (16) is fixedly connected with a first connecting pipe (17), the outside of the first connecting pipe (17) is provided with a second solenoid valve (18), the inner top of the treatment chamber (16) is fixedly connected with a second connecting pipe (19), the outside of the second connecting pipe (19) is provided with a third solenoid valve (20), the outsides of the first connecting pipe (17) and the second connecting pipe (19) are both provided with spray heads (21), and the top of the treatment box (1) is fixedly connected with a reflux component, which is used to recycle the treated flue gas.
2. A boiling furnace fume recovery device according to claim 1, characterized in that: The reflux assembly comprises a guide pot (23), the guide pot (23) is fixedly connected to the top of the treatment box (1), a carbon fiber filter plate (24) is arranged on the inner side of the guide pot (23), a ceramic filter plate (25) is arranged on the inner side of the guide pot (23), a reflux pipe (26) is fixedly connected to the top end of the guide pot (23), and the other end of the reflux pipe (26) is fixedly connected to the gas tank (11).
3. A fume recovery device for a fluidized bed furnace according to claim 2, characterized in that: The gas tank (11) is fixedly connected to the top of the processing box (1), and the outside of the gas tank (11) is fixedly connected to an air pipe (12), and the air pipe (12) passes through the processing box (1) and is arranged at the inner top of the dust removal chamber (6).
4. A fume recovery device for a fluidized bed furnace according to claim 3, characterized in that: The outside of the air pipe (12) is provided with a first electromagnetic valve (13), and the outside of the air pipe (12) is provided with a spray head (14).
5. The fume recovery device for a fluidized bed furnace according to claim 1, characterized in that: The bottom of the dust removal chamber (6) is provided with an ash discharge pipe (10), and the ash discharge pipe (10) is fixedly connected to the bottom of the processing box (1).
6. A fume recovery device for a fluidized bed furnace according to claim 1, characterized in that: A waste discharge pipe (22) is provided at the bottom of the processing chamber (16), and the waste discharge pipe (22) is fixedly connected to the bottom of the processing box (1).
7. The fume recovery device for a fluidized bed furnace according to claim 1, characterized in that: The bottom of the cold water tank (3) is fixedly connected to a water outlet pipe (4), and a valve (5) is arranged outside the water outlet pipe (4).
8. The fume recovery device for a fluidized bed furnace according to claim 1, characterized in that: A controller (27) is fixedly connected to the front side of the processing box (1).