CN213314309U - Device for preventing exhaust dome valve from being jammed - Google Patents
Device for preventing exhaust dome valve from being jammed Download PDFInfo
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- CN213314309U CN213314309U CN202021825396.0U CN202021825396U CN213314309U CN 213314309 U CN213314309 U CN 213314309U CN 202021825396 U CN202021825396 U CN 202021825396U CN 213314309 U CN213314309 U CN 213314309U
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- exhaust
- dome valve
- limestone
- buffer tank
- exhaust pipe
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Abstract
The utility model discloses a device for preventing exhaust dome valve is stuck, include: the device comprises a conical buffer tank and an exhaust pipe communicated with the conical buffer tank, wherein an exhaust dome valve is arranged on the exhaust pipe, and an auxiliary purging device communicated with the exhaust pipe is also arranged on the exhaust pipe. The utility model provides a device for preventing CFB boiler limestone system exhaust dome valve jamming. The device can prevent effectively that the lime stone exhaust dome valve from blocking during the lime stone system operation, prevents that the lime stone unloading is not smooth, guarantees the normal work of lime stone system during boiler high load, ensures environmental protection parameter discharge to reach standard.
Description
Technical Field
The utility model relates to a boiler sweetener field especially relates to a device for preventing exhaust dome valve is stuck.
Background
At present, most of the internal desulfurization of circulating fluidized bed boilers at home and abroad adopts limestone removal, and a boiler limestone system is divided into a bin pump system and a conveying system.
In the operation process of the limestone system, the exhaust dome valve is opened, the pressure in the material collecting pump is exhausted, after exhausting for 10 seconds, the pressure is reduced to a set value, the inlet dome valve of the material collecting pump is opened, and limestone materials enter the material collecting pump under the action of gravity. In the process, if the limestone exhaust dome valve is blocked, the pressure in the material collecting pump cannot be timely relieved, the problem of unsmooth discharging of a limestone system occurs, and the limestone system is in failure to influence SO2Discharging after reaching the standard.
The limestone system frequently has system faults such as jamming, exhaust pipe blockage and the like in the exhaust dome valve during operation, SO that the unit output is reduced slightly, the stable operation of the unit is influenced, and SO is caused in serious cases2Emissions are out of specification and even forced to shut down. Therefore, the unit cannot normally carry high load, and the normal production operation of a power plant is influenced; the limestone collecting pump operates under pressure, and when the limestone exhaust dome valve is in fault during processing, a large amount of limestone is sprayed out to cause personnel injury. Therefore, the safety, reliability and economy of boiler operation are obviously limited.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a device for preventing exhaust calotte valve is stuck to solve among the prior art technical problem that limestone exhaust pipe blockked up, exhaust calotte valve is stuck, in order to reach and avoid the frequent trouble of limestone system, improve limestone system reliability, avoid the unit environmental protection abnormal event to appear, thoroughly solve the purpose of exhaust calotte valve is stuck.
In order to solve the above problem, the utility model adopts the following technical scheme:
a device for preventing jamming of a vented dome valve comprising: the conical buffer tank and the exhaust pipe communicated with the conical buffer tank are arranged, an exhaust dome valve is arranged on the exhaust pipe, and an auxiliary purging device communicated with the exhaust pipe is further arranged on the exhaust pipe.
Optionally, the exhaust dome valve is disposed between the auxiliary purge and the conical surge tank.
Optionally, the conical buffer tank is a cone with a dome-shaped upper top.
Optionally, the height of the conical buffer tank is in the range of 1000-1400 mm.
Preferably, the height of the conical buffer tank is 1200 mm.
Optionally, the diameter of the upper top of the conical buffer tank is in the range of 200-400 mm; the diameter of the lower bottom of the conical buffer tank is within the range of 60-100 mm; the height of the upper top of the conical buffer tank is within the range of 100-300 mm.
Preferably, the diameter of the upper top of the conical buffer tank is 300 mm; the diameter of the lower bottom of the conical buffer tank is 80 mm; the height of the upper top of the conical buffer tank is 200 mm.
Optionally, the distance between the exhaust dome valve and the conical buffer tank is in the range of 800-1000 mm.
Preferably, the distance between the exhaust dome valve and the conical buffer tank is 900 mm.
Optionally, one end of the auxiliary purging device is connected to a compressed air storage tank.
Optionally, the auxiliary purge device comprises a compressed air conduit and a valve disposed on the compressed air conduit.
Optionally, one end of the exhaust pipe is connected to the limestone powder bin.
Optionally, the lower part of the conical buffer tank is connected with a limestone collecting pump.
The utility model discloses a technical scheme can reach following beneficial effect:
(1) the utility model provides a device for preventing CFB boiler limestone system exhaust dome valve jamming. The device can prevent effectively that the lime stone exhaust dome valve from blocking during the lime stone system operation, prevents that the lime stone unloading is not smooth, guarantees the normal work of lime stone system during boiler high load, ensures environmental protection parameter discharge to reach standard.
(2) The device is the research under the prerequisite of the trouble reason of limestone exhaust dome valve jamming, because the limestone material collecting pump is when the release is carminative, material granule can't in time fall back to in the material collecting pump in the limestone exhaust dome valve pipeline, causes the exhaust dome valve jamming. Therefore, the height of the buffer tank is designed to be between 1000 and 1400mm, preferably 1200mm when the buffer tank is manufactured. By selecting the appropriate height of the surge tank, the amount of large limestone particles entering the exhaust dome valve chute is reduced.
(2) Capacity increasing, speed reduction and natural falling. In order to further reduce limestone particles entering the exhaust dome valve and the inclined pipe, the vertical buffer pipe is made into a cone, so that the gas inlet volume is enlarged, the gas flow rate is reduced, and large particle materials naturally fall back.
(3) In order to reduce the amount of limestone remaining in the exhaust dome valve slope pipe as much as possible, the distance between the exhaust dome valve and the surge tank is increased, and for example, the distance between the exhaust dome valve and the surge tank is set to 800 to 1000mm, preferably 900 mm. By selecting the proper distance between the exhaust dome valve and the buffer riser, the residual amount of limestone in the riser is significantly reduced.
(4) The utility model discloses in, will remain in the tiny particle limestone in exhaust dome valve upper portion pipeline blows in the lime stone material collecting pump through supplementary device that sweeps, do not have lime stone material jamming when guaranteeing that exhaust dome valve closes, avoid causing the lime stone unloading not smooth. Through using the utility model provides a device, the unsmooth trouble greatly reduced of boiler limestone exhaust dome valve card leads to SO because of limestone system trouble2The condition that the emission exceeds the standard is greatly reduced, and a solid foundation is laid for long-period safe, stable and reliable operation of the power plant unit.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 shows a cross-sectional view of a surge tank;
FIG. 2 is a cross-sectional view of the exhaust dome valve and auxiliary purge device;
fig. 3 is a schematic view of the whole limestone exhaust dome valve anti-blocking device.
Description of reference numerals:
1 conical buffer tank
2 exhaust dome valve
3 auxiliary purging device
4 limestone powder bin
5 limestone collecting pump
6 limestone feed pump
7 exhaust pipe
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
As shown in FIG. 1, a steel plate with a thickness of 3mm is used, and a lower bottom is rolled to have a diameter
Is 80mm, the diameter of the upper top
Is 300mm in height
1200mm, dome-shaped top and high top
Is a 200mm cone buffer tank 1. As shown in fig. 2 to 3, the upper part of the cone surge tank 1 is communicated with an exhaust pipe 7, an exhaust dome valve 2 is provided on the exhaust pipe 7, and an auxiliary purge device 3 communicated with the exhaust pipe 7 is further provided on the exhaust pipe 7. An exhaust dome valve 2 is provided between the auxiliary purge device 3 and the conical surge tank 1. The distance between the exhaust dome valve 2 and the conical buffer tank 1 is 900 mm. The auxiliary blowing device 3 is installed at a position 100mm away from the outlet of the exhaust dome valve, one end of the auxiliary blowing device 3 is connected to the compressed air storage tank, in the embodiment, the auxiliary blowing device 3 comprises a compressed air pipeline and a DN25 ball valve arranged on the compressed air pipeline, and one end of the ball valve is connected with compressed air for blowing. One end of the exhaust pipe 7 is connected to the limestone powder bin 4. The lower part of the conical buffer tank 1 is connected with a limestone collecting pump 5.
Before the limestone powder falls into the limestone powder receiving pump 5 from the limestone powder bin 4 in fig. 3, the exhaust dome valve 2 is opened, compressed air and limestone powder in the limestone powder receiving pump 5 enter the conical buffer tank 1, and are discharged into the limestone powder bin 4 through the exhaust pipe 7 so as to avoid the pollution of the limestone powder to the atmospheric environment, and the limestone powder bin 4 is communicated with the atmosphere (namely, the air pressure in the limestone powder bin is the atmospheric pressure). After the exhaust dome valve 2 is opened for 5 seconds, the valve of the auxiliary purging device 3 is opened to purge the residual limestone powder in the exhaust pipe 7, so that the anti-blocking effect is achieved.
When the pressure in the limestone collecting pump 5 is reduced to a set value after exhausting, an inlet dome valve of the limestone collecting pump 5 is opened, and limestone materials enter the limestone collecting pump 5 under the action of gravity; in the process of filling, the pressure equalizing valve of the limestone receiving pump is opened to play a role in gasification so as to prevent the materials from hardening. The level switch on the limestone take-up pump 5 indicates that the material is full, both the inlet dome valve and the exhaust dome valve will close. The limestone collecting pump 5 will start to pressurize, and when the pressure sensors mounted on the two pumps indicate that the pressures of the two pumps are the same, the pressure equalizing valve of the collecting pump is closed. The inlet dome valve of the limestone feed pump 6 is opened, the material falls into the limestone feed pump 6 by the limestone collecting pump 5, and the rotary feeder feeds the hearth.
In the process of the limestone powder bin pump, when the exhaust dome valve 2 is opened, compressed air in the limestone collecting pump 5 carries materials to be discharged into the conical buffer tank 1, and large limestone particles fall into the limestone collecting pump 5 again under the action of gravity. After the pressure in the limestone collecting pump 5 is reduced, the auxiliary blowing device 3 is started, and the small-particle limestone remained in the pipeline at the upper part of the exhaust dome valve 2 is blown into the limestone collecting pump 5, so that the limestone material is not blocked when the exhaust dome valve 2 is closed, and the limestone discharging is prevented from being unsmooth.
When the cone buffer tank is manufactured, the used material is common carbon steel with the thickness of 3mm, the barrel body of the cone buffer tank is required to be rolled and welded integrally, and the inner wall is smooth and has no burrs; the upper top cover is a spherical dome, is connected with the upper edge of the cylinder in a welding way, and an opening on the upper part of the cylinder wall is welded with the exhaust pipeline.
Example 2
The same as example 1, except that the conical buffer tank 1 has a lower bottom diameter of 60mm, an upper top diameter of 200mm, a height of 1400mm, and a top height of 300mm, and the distance between the exhaust dome valve 2 and the conical buffer tank 1 is 1000 mm.
Example 3
The same as example 1, except that the conical buffer tank 1 has a bottom diameter of 100mm, a top diameter of 400mm, a height of 1000mm, and a top height of 100mm, and the distance between the exhaust dome valve 2 and the conical buffer tank 1 is 800 mm.
The limestone system of the power plant # 2 boiler of the Shenhuayili energy finite responsibility company adopts the device in the embodiment 1, the operation condition of the limestone system of the boiler is good at the present stage,the use effect shows that the device reduces the defect incidence, the limestone exhaust dome valve jam defect occurs 16 times all the year round, and the defect incidence is reduced by more than 90%. The defect of jamming of the limestone exhaust dome valve is greatly reduced after optimization and transformation. SO (SO)2The condition that the emission exceeds the standard is greatly reduced, the high load capacity of the unit belt is improved, the quality and the efficiency of a power plant are guaranteed, and the labor intensity of maintainers is reduced. The long-period safe and reliable operation of the boiler is ensured, and the boiler can be popularized and practically applied in a large area.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A device for preventing jamming of a vented dome valve, comprising:
the device comprises a conical buffer tank (1) and an exhaust pipe (7) communicated with the conical buffer tank (1), wherein an exhaust dome valve (2) is arranged on the exhaust pipe (7), and an auxiliary purging device (3) communicated with the exhaust pipe (7) is further arranged on the exhaust pipe (7).
2. The device according to claim 1, characterized in that said exhaust dome valve (2) is arranged between said auxiliary purging device (3) and said conical buffer tank (1).
3. The device according to claim 1, characterized in that the conical buffer vessel (1) is a cone with a dome-shaped upper top.
4. The device according to claim 3, characterized in that the height of the conical buffer vessel (1) is in the range of 1000-1400 mm.
5. The device according to claim 3, characterized in that the diameter of the top of the conical buffer tank (1) is in the range of 200-400 mm;
the diameter of the lower bottom of the conical buffer tank (1) is within the range of 60-100 mm;
the height of the upper top of the conical buffer tank (1) is within the range of 100-300 mm.
6. The device according to claim 1, characterized in that the distance of the air-discharge dome valve (2) from the conical buffer tank (1) is in the range of 800-1000 mm.
7. Device according to claim 1, characterized in that one end of the auxiliary purging device (3) is connected to a compressed air storage tank.
8. The device according to claim 1, characterized in that the auxiliary purging device (3) comprises a compressed air line and a valve arranged on the compressed air line.
9. The apparatus according to claim 1, characterized in that one end of the exhaust pipe (7) is connected to the limestone powder bin (4).
10. The apparatus according to claim 1, characterized in that the lower part of the conical surge tank (1) is connected to a limestone feed pump (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021825396.0U CN213314309U (en) | 2020-08-27 | 2020-08-27 | Device for preventing exhaust dome valve from being jammed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021825396.0U CN213314309U (en) | 2020-08-27 | 2020-08-27 | Device for preventing exhaust dome valve from being jammed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213314309U true CN213314309U (en) | 2021-06-01 |
Family
ID=76100141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021825396.0U Active CN213314309U (en) | 2020-08-27 | 2020-08-27 | Device for preventing exhaust dome valve from being jammed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213314309U (en) |
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2020
- 2020-08-27 CN CN202021825396.0U patent/CN213314309U/en active Active
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