CN217031179U - Device for reducing Nitrogen Oxide (NOX) in steam of circulating fluidized bed boiler - Google Patents
Device for reducing Nitrogen Oxide (NOX) in steam of circulating fluidized bed boiler Download PDFInfo
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- CN217031179U CN217031179U CN202220591420.1U CN202220591420U CN217031179U CN 217031179 U CN217031179 U CN 217031179U CN 202220591420 U CN202220591420 U CN 202220591420U CN 217031179 U CN217031179 U CN 217031179U
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- fluidized bed
- bed boiler
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Abstract
The utility model relates to the technical field of flue gas denitration of coal-fired boilers, in particular to a steam Nitrogen Oxide (NOX) reduction device of a circulating fluidized bed boiler, which comprises a softening water tank and a coal-fired circulating fluidized bed boiler hearth, wherein the softening water tank is connected with a steam generation assembly through a pipeline; the beneficial effects are that: by using easily-obtained and cheap resource water and boiler fuel coal, nitrogen reduction of boiler flue gas is realized under specific working conditions, namely the initial NOX emission value of the boiler is reduced, the using amount of a reducing agent (ammonia water or urea) is saved for a subsequent denitration treatment process, and a new denitrification improvement route is provided for a coal-fired fluidized bed boiler, particularly an old fluidized bed boiler.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration of coal-fired boilers, in particular to a steam Nitrogen Oxide (NOX) reducing device of a circulating fluidized bed boiler.
Background
With the tightening of national environmental protection policies and the increase of control force, the requirements of various places on the emission of various boiler nitrogen oxides (NOx) are more severe. How to strengthen the treatment of the atmospheric pollutants of the boiler, protect the ecological environment, reduce the emission of the pollutants and realize green development is still an urgent task in the boiler industry. In recent years, the denitration of a low-nitrogen combustion process, an SNCR (selective catalytic reduction) process and an SCR (selective catalytic reduction) process designed for a coal-fired boiler is mature, and the denitrification efficiency also meets the requirement of environmental protection and emission. How to save energy and reduce consumption on the basis of a mature process and how to reduce the consumption of reducing agents begins to become a new breakthrough direction.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a device for reducing Nitrogen Oxides (NOX) in steam of a circulating fluidized bed boiler, so as to solve the above problems.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a circulating fluidized bed boiler steam Nitrogen Oxide (NOX) device falls, is including softening water tank and coal-fired circulating fluidized bed boiler grate, it produces the subassembly through pipe connection steam to soften the water tank, steam produces the subassembly and has injector assembly through the pipe connection, injector assembly connects coal-fired circulating fluidized bed boiler grate through the protection subassembly, the surface of protection subassembly is provided with pulls the installed part, it has the air exhauster to pull installed part internally mounted, and the outside of pulling the installed part is provided with filtering component, filtering component's inside is provided with the clearance piece, and filters the piece bottom and is provided with the dust and carries the piece.
Preferably, the steam generating assembly comprises a steam generator, the steam generator is connected with a steam buffer tank through a pipeline, and the steam buffer tank is connected with a pressure reducer through a pipeline.
Preferably, the injector assembly comprises a spray gun and a metal hose attached to the end of the spray gun, the metal hose being attached to a surface of the pressure reducer.
Preferably, the protection subassembly is including installing the high temperature plastic fire-resistant protective sheath on coal-fired circulating fluidized bed boiler furnace bed curb plate, and the telescopic outside at high temperature resistant alloy is established to the plastic fire-resistant protective sheath of high temperature fire-resistant, sprays the spray gun and pegs graft on the telescopic surface of high temperature resistant alloy, and the telescopic outside of high temperature resistant alloy is provided with the cooling subassembly.
Preferably, the cooling assembly comprises a protection frame and a cooling compressed air conveying pipe inserted in the bottom surface of the protection frame, the protection frame is sleeved outside the high-temperature-resistant alloy sleeve, and the protection frame is fixed on the outer wall of the coal-fired circulating fluidized bed boiler hearth.
Preferably, the traction mounting member comprises a mounting frame and a traction rod connected between the mounting frame and the protection frame, and the suction fan is arranged in an inner annular opening of the mounting frame.
Preferably, the filtering component comprises a pocket material frame and a connecting ring connected to the surface of the pocket material frame, the connecting ring is sleeved on the outer side of the mounting frame and fixed through bolts, and a filter plate is installed at an inner ring opening of the pocket material frame.
Preferably, the cleaning piece includes the cleaning plate and runs through the guide post of cleaning plate, and the guide post is fixed at the inner ring mouth of bulk cargo frame, and the bulk cargo frame is installed at the interior anchor ring of pocket work or material rest, and the surface of cleaning plate is provided with pulls the piece.
Preferably, the traction piece comprises a traction rope body, a bolting ring and a pull ring, the bolting ring and the pull ring are bolted to two ends of the traction rope body, the bolting ring is fixed to the bottom surface of the cleaning plate, the pull ring is located below the pocket frame, a spring is sleeved on the outer side of the guide column and fixed between the top surface of the cleaning plate and the inner ring surface of the pocket frame, and the traction rope body penetrates through the bottom plate of the pocket frame and the bottom plate of the pocket frame.
Preferably, the piece is carried to the dust includes bin outlet and conveying pipeline, and the bin outlet is seted up on the bottom plate of pocket work or material rest, and conveying pipeline fixes in the bottom surface of pocket work or material rest, and conveying pipeline's last port communicates with each other with the bottom port of bin outlet.
Compared with the prior art, the utility model has the beneficial effects that: the utility model has reasonable structure and strong functionality, and has the following advantages:
1. the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reducing device provided by the utility model utilizes easily-obtained and cheap resource water and self-fuel coal of the boiler to realize the nitrogen reduction of boiler flue gas under a specific working condition, namely, the initial NOX emission value of the boiler is reduced, the use amount of reducing agents (ammonia water or urea) is saved for a subsequent denitration treatment process, and a new denitrification transformation route is provided for a coal-fired fluidized bed boiler, particularly an old fluidized bed boiler;
2. according to the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reducing device, the protective frame is additionally arranged on the outer side of the high-temperature-resistant alloy sleeve, the cooling compressed air conveying pipe cools the high-temperature-resistant alloy sleeve by cold air in the protective frame, the exhaust fan extracts hot air in the protective frame, the filter plate is additionally arranged on the outer side of the exhaust fan to reduce particulate matters from scattering, and the cleaning plate is additionally arranged in the material bag frame to facilitate cleaning of the filter plate.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of the pocket frame structure of the present invention;
fig. 3 is an enlarged schematic view of the structure at a in fig. 2.
In the figure: softened water tank 1, steam generator 2, steam buffer tank 3, pressure reducer 4, injection spray gun 5, metal collapsible tube 6, high temperature plastic fire-resistant protective sheath 7, high temperature resistant alloy sleeve 8, protection frame 9, cooling compressed air conveyer pipe 10, traction rod 11, mounting bracket 12, air exhauster 13, go-between 14, pocket work or material rest 15, filter plate 16, bulk cargo frame 17, guide post 18, clearance board 19, bolt ring 20, draw rope body 21, pull ring 22, spring 23, bin outlet 24, conveying pipeline 25, coal-fired circulating fluidized bed boiler grate 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a device for reducing Nitrogen Oxide (NOX) by steam of a circulating fluidized bed boiler comprises a softening water tank 1 and a coal-fired circulating fluidized bed boiler hearth 26, wherein the softening water tank 1 is connected with a steam generation assembly through a pipeline, the steam generation assembly comprises a steam generator 2, the steam generator 2 is connected with a steam buffer tank 3 through a pipeline, the steam buffer tank 3 is connected with a pressure reducer 4 through a pipeline, the steam generation assembly is connected with an ejector assembly through a pipeline, the ejector assembly comprises a spray gun 5 and a metal hose 6 connected to the end part of the spray gun 5, and the metal hose 6 is connected to the surface of the pressure reducer 4;
the ejector component is connected with a fire coal circulating fluidized bed boiler hearth 26 through a protection component, the protection component comprises a high-temperature plastic-fire-resistant protective sleeve 7 arranged on a side plate of the fire coal circulating fluidized bed boiler hearth 26, the high-temperature plastic-fire-resistant protective sleeve 7 is sleeved on the outer side of a high-temperature-resistant alloy sleeve 8, the ejection spray gun 5 is inserted in the surface of the high-temperature-resistant alloy sleeve 8, a cooling component is arranged on the outer side of the high-temperature-resistant alloy sleeve 8, the cooling component comprises a protective frame 9 and a cooling compressed air conveying pipe 10 inserted in the bottom surface of the protective frame 9, the protective frame 9 is sleeved on the outer side of the high-temperature-resistant alloy sleeve 8, and the protective frame 9 is fixed on the outer wall of the fire coal circulating fluidized bed boiler hearth 26;
the surface of the protection component is provided with a traction mounting piece, an exhaust fan 13 is mounted inside the traction mounting piece, the traction mounting piece comprises a mounting frame 12 and a traction rod 11 connected between the mounting frame 12 and the protection frame 9, the exhaust fan 13 is mounted in an inner ring opening of the mounting frame 12, a filtering component is arranged on the outer side of the traction mounting piece, the filtering component comprises a pocket frame 15 and a connecting ring 14 connected to the surface of the pocket frame 15, the connecting ring 14 is sleeved on the outer side of the mounting frame 12 and then fixed through bolts, and a filter plate 16 is mounted on the inner ring opening of the pocket frame 15;
the inside of the filtering component is provided with a cleaning part, the cleaning part comprises a cleaning plate 19 and a guide post 18 penetrating through the cleaning plate 19, the guide post 18 is fixed at an inner annular opening of the bulk material rack 17, the bulk material rack 17 is installed at the inner annular surface of the pocket rack 15, the surface of the cleaning plate 19 is provided with a traction part, the traction part comprises a traction rope body 21, a bolting ring 20 and a pull ring 22 bolted at two ends of the traction rope body 21, the bolting ring 20 is fixed at the bottom surface of the cleaning plate 19, the pull ring 22 is arranged below the pocket rack 15, the outer side of the guide post 18 is sleeved with a spring 23, the spring 23 is fixed between the top surface of the cleaning plate 19 and the inner annular surface of the bulk material rack 17, the traction rope body 21 penetrates through the bottom plates of the bulk material rack 17 and the feed delivery rack 15, the bottom of the filtering part is provided with a dust conveying part, the dust conveying part comprises a discharge port 24 and a pipeline 25, the discharge port 24 is arranged on the bottom plate of the pocket rack 15, the pipeline 25 is fixed at the bottom surface of the feed delivery rack 15, the upper end opening of the material conveying pipeline 25 is communicated with the bottom end opening of the material discharging opening 24.
The working principle is as follows: when the device is actually used, the softened water tank 1 is made of SUS304 stainless steel, soft water automatically flows into the steam generator 2, the water quantity is adjusted according to an adjusting valve and a flowmeter, the steam generation quantity is determined according to the water inflow, the generated steam enters the steam buffer tank 3, the saturated steam from the steam buffer tank 3 is decompressed by the decompression device 4 and then is connected with the injection spray gun 5 through the metal hose 6 and is injected into the coal-fired circulating fluidized bed boiler hearth 26; the spray gun 5 is a single-fluid spray gun, and the flow speed of the water vapor passing through the spray gun, the required pressure range and the effective coverage of the spray gun are simulated by professional fluid simulation software; the steam generator 2 is a very mature product in the boiler industry, and the specification of the steam generator is selected according to the flow, pressure and temperature of water vapor; the pressure reducing device 4 is formed by combining a pressure reducing valve, a pressure gauge and a thermometer and is used for adjusting the steam pressure required by the spraying of the spray gun;
fixing the high-temperature-resistant alloy sleeve 8 on the hearth membrane wall, and adopting a loose joint mode between the high-temperature-resistant alloy sleeve 8 and the injection spray gun 5 to facilitate the disassembly, maintenance and replacement of the injection spray gun 5, and injecting cold air into the protective frame 9 by using the pressure temperature-reducing compressed air conveying pipe 10 to cool the high-temperature-resistant alloy sleeve 8 so as to prevent the high-temperature-resistant alloy sleeve 8 from melting and deforming at high temperature;
when the exhaust fan 13 exhausts the air flow in the protection frame 9, the filter plate 16 blocks particulate matters in the air flow, the blocked particulate matters slide down along the bulk material frame 17 and then enter the material conveying pipeline 25 from the material outlet 24, when the surface of the filter plate 16 needs to be cleaned, the pull ring 22 is held by hand to stretch the traction rope body 21 downwards, the traction rope body 21 pulls the cleaning plate 19 to slide down along the guide column 18 to clean the surface of the filter plate 16, the spring 23 is stretched, and after the pull ring 22 is loosened, the spring 23 rebounds to pull the cleaning plate 19 to move back.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a circulating fluidized bed boiler steam Nitrogen Oxide (NOX) device that falls, includes softening water tank (1) and coal-fired circulating fluidized bed boiler grate (26), its characterized in that: soften water tank (1) and produce the subassembly through pipe connection steam, steam produces the subassembly and has ejector subassembly through pipe connection, ejector subassembly passes through protection component connection coal-fired circulating fluidized bed boiler grate (26), protection component's surface is provided with draws the installed part, it has air exhauster (13) to draw installed part internally mounted, and draws the outside of installed part to be provided with filtering component, filtering component's inside is provided with the clearance piece, and just filters the piece bottom and is provided with the dust and carries the piece.
2. The apparatus of claim 1, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the steam generation assembly comprises a steam generator (2), the steam generator (2) is connected with a steam buffer tank (3) through a pipeline, and the steam buffer tank (3) is connected with a pressure reducer (4) through a pipeline.
3. The steam Nitrogen Oxide (NOX) reducing apparatus of the circulating fluidized bed boiler according to claim 2, wherein: the ejector assembly comprises a spray gun (5) and a metal hose (6) connected to the end of the spray gun (5), wherein the metal hose (6) is connected to the surface of the pressure reducer (4).
4. The apparatus of claim 3, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the protection subassembly is including installing high temperature plastic fire-resistant protective sheath (7) on coal-fired circulating fluidized bed boiler hearth (26) curb plate, and high temperature plastic fire-resistant protective sheath (7) cover is established in the outside of high temperature resistant alloy sleeve (8), sprays spray gun (5) and pegs graft on the surface of high temperature resistant alloy sleeve (8), and the outside of high temperature resistant alloy sleeve (8) is provided with the cooling subassembly.
5. The apparatus of claim 4, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the cooling assembly comprises a protection frame (9) and a cooling compressed air conveying pipe (10) inserted into the bottom surface of the protection frame (9), the protection frame (9) is sleeved on the outer side of the high-temperature-resistant alloy sleeve (8), and the protection frame (9) is fixed on the outer wall of a coal-fired circulating fluidized bed boiler hearth (26).
6. The apparatus of claim 5, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the traction mounting piece comprises a mounting frame (12) and a traction rod (11) connected between the mounting frame (12) and the protection frame (9), and an exhaust fan (13) is installed in an inner ring opening of the mounting frame (12).
7. The apparatus of claim 6, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the filter assembly comprises a pocket material frame (15) and a connecting ring (14) connected to the surface of the pocket material frame (15), the connecting ring (14) is sleeved on the outer side of the mounting frame (12) and fixed through bolts, and a filter plate (16) is installed at an inner ring opening of the pocket material frame (15).
8. The apparatus of claim 7, wherein the circulating fluidized bed boiler steam Nitrogen Oxide (NOX) reduction apparatus comprises: the clearance piece is including clearance board (19) and guide post (18) that run through clearance board (19), and the interior orifice in bulk material frame (17) is fixed in guide post (18), and bulk material frame (17) are installed in the interior anchor ring of pocket work or material rest (15), and the surface of clearance board (19) is provided with draws the piece.
9. The steam Nitrogen Oxide (NOX) reducing apparatus of the circulating fluidized bed boiler of claim 8, wherein: the traction piece comprises a traction rope body (21), and a bolting ring (20) and a pull ring (22) which are bolted at two ends of the traction rope body (21), wherein the bolting ring (20) is fixed on the bottom surface of a cleaning plate (19), the pull ring (22) is positioned below a pocket frame (15), a spring (23) is sleeved on the outer side of a guide column (18), the spring (23) is fixed between the top surface of the cleaning plate (19) and the inner ring surface of the bulk material frame (17), and the traction rope body (21) penetrates through the bottom plates of the bulk material frame (17) and the pocket frame (15).
10. The steam Nitrogen Oxide (NOX) reducing apparatus of the circulating fluidized bed boiler of claim 7, wherein: the dust conveying piece comprises a discharge port (24) and a conveying pipeline (25), the discharge port (24) is arranged on a bottom plate of a pocket material frame (15), the conveying pipeline (25) is fixed on the bottom surface of the pocket material frame (15), and an upper port of the conveying pipeline (25) is communicated with a bottom port of the discharge port (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591420.1U CN217031179U (en) | 2022-03-18 | 2022-03-18 | Device for reducing Nitrogen Oxide (NOX) in steam of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591420.1U CN217031179U (en) | 2022-03-18 | 2022-03-18 | Device for reducing Nitrogen Oxide (NOX) in steam of circulating fluidized bed boiler |
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| Publication Number | Publication Date |
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| CN217031179U true CN217031179U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220591420.1U Active CN217031179U (en) | 2022-03-18 | 2022-03-18 | Device for reducing Nitrogen Oxide (NOX) in steam of circulating fluidized bed boiler |
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| Country | Link |
|---|---|
| CN (1) | CN217031179U (en) |
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2022
- 2022-03-18 CN CN202220591420.1U patent/CN217031179U/en active Active
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