CN217978858U - System for reduce stove smoke fan and pipeline wearing and tearing - Google Patents
System for reduce stove smoke fan and pipeline wearing and tearing Download PDFInfo
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- CN217978858U CN217978858U CN202221853292.XU CN202221853292U CN217978858U CN 217978858 U CN217978858 U CN 217978858U CN 202221853292 U CN202221853292 U CN 202221853292U CN 217978858 U CN217978858 U CN 217978858U
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Abstract
The utility model discloses a system for reducing the abrasion of a furnace smoke fan and a pipeline, which comprises a boiler, a cyclone separator, an air lock, an ash conveying device and a furnace smoke fan; be provided with stove smoke extraction mouth on the afterbody flue of boiler, stove smoke extraction mouth is linked together with cyclone's entry, cyclone's bottom export is linked together through airlock and ash conveyor's entry, cyclone's top export is divided into two the tunnel, wherein is linked together with the entry of stove smoke fan all the way, another way is linked together with ash conveyor, this system reduces the wearing and tearing of flue gas dust to stove smoke fan and pipeline by a wide margin, the life-span of extension stove smoke fan and pipeline, reduce maintenance work load, improve the stability of stove smoke fan system operation, and then improve the operational reliability of unit.
Description
Technical Field
The utility model belongs to the technical field of coal-fired power generation, a system for reduce stove smoke fan and pipeline wearing and tearing is related to.
Background
The boiler smoke fan is widely applied to coal-fired thermal power plants, is important equipment of systems for drying raw coal by the boiler smoke, improving the drying output of a powder making system, reducing the explosion risk of the powder making system, reducing the NOx discharge amount at the outlet of a boiler, improving the reheating steam temperature by the boiler smoke recirculation, mixing and burning sludge and the like, and the operation reliability of the boiler smoke fan directly influences the operation stability of the systems. Because the raw coal for combustion of the coal-fired unit has ash content which accounts for 10-40% of the mass fraction of the raw coal for combustion, and 80-90% of the ash content enters the tail flue along with the flue gas in the form of fly ash, the dust content in the flue gas of the boiler is very high. The high former flue gas of boiler afterbody dust content gets into the system in the stove cigarette fan extraction, and ash grain has been solid particle shape in the flue gas, has erosive wear to stove cigarette fan and pipeline, and the degree of wear is aggravated along with the increase of extraction flue gas volume and the improvement of former coal ash ratio proportion, and stove cigarette fan and pipeline running condition are very abominable promptly, and reduce stove cigarette fan and pipeline wearing and tearing and to improving the reliability of stove cigarette fan system operation crucial.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a system for reducing stove smoke fan and pipeline wearing and tearing, this system reduces the wearing and tearing of flue gas dust to stove smoke fan and pipeline by a wide margin, improves the stability of stove smoke fan system operation, and then improves the operational reliability of unit.
In order to achieve the purpose, the system for reducing the abrasion of the furnace smoke fan and the pipeline comprises a boiler, a cyclone separator, an air lock, an ash conveying device and the furnace smoke fan;
a boiler smoke extraction opening is formed in a tail flue of the boiler and communicated with an inlet of a cyclone separator, an outlet at the bottom of the cyclone separator is communicated with an inlet of an ash conveying device through an air locker, an outlet at the top of the cyclone separator is divided into two paths, one path of the outlet is communicated with an inlet of a boiler smoke fan, and the other path of the outlet is communicated with the ash conveying device.
The tail flue of the boiler is internally provided with a heating surface at the tail of the boiler.
The boiler smoke extraction opening and the heating surface at the tail part of the boiler are distributed in sequence along the smoke flowing direction.
The top outlet of the cyclone separator is divided into two paths after passing through a furnace smoke flow measuring device.
The top outlet of the cyclone separator is divided into two paths after passing through the furnace smoke flow measuring device and the furnace smoke pressure measuring device.
The top outlet of the cyclone separator is divided into two paths after passing through a furnace smoke flow measuring device, a furnace smoke pressure measuring device and a furnace smoke temperature measuring device.
The top outlet of the cyclone separator is divided into two paths through a furnace smoke flow measuring device, a furnace smoke pressure measuring device, a furnace smoke temperature measuring device and a smoke flow regulating valve.
The top outlet of the cyclone separator is communicated with an ash conveying device through a negative pressure adjusting valve.
The utility model discloses following beneficial effect has:
reduce system of stove cigarette fan and pipeline wearing and tearing when concrete operation, install cyclone additional in the entrance of stove cigarette fan, the high temperature stove cigarette tangential that contains the high concentration dust gets into cyclone, under centrifugal force, 85 ~ 90% particle diameter is big, the ash particle that wearability is strong separates out from the gas-solid two-phase flow, get into in the below airlock, after the ash particle reaches certain weight, the airlock action, the ash column that forms and airlock play jointly and prevent that the air current from scurrying in the cyclone, in order to avoid destroying the effect in the rotatory separator inner flow field, reach the mesh of guarantee cyclone separation effect, reduce the wearing and tearing of flue gas dust to stove cigarette fan and pipeline by a wide margin, improve the stability of stove cigarette fan system operation, and then improve the operational reliability of unit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The system comprises a boiler, a boiler smoke extraction port, a boiler tail heating surface, a boiler smoke flow measuring device, a boiler smoke pressure measuring device, a boiler smoke temperature measuring device, a cyclone separator, a smoke flow adjusting valve, a gas locking device, a negative pressure adjusting valve, an ash conveying device and a boiler smoke fan, wherein the boiler smoke extraction port is 1, the boiler smoke extraction port is 2, the boiler tail heating surface is 3, the boiler smoke flow measuring device is 4, the boiler smoke pressure measuring device is 5, the boiler smoke temperature measuring device is 6, the cyclone separator is 7, the smoke flow adjusting valve is 8, the gas locking device is 9, the negative pressure adjusting valve is 10, the ash conveying device is 11, and the boiler smoke fan is 12.
Detailed Description
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
The structural schematic according to the disclosed embodiment of the invention is shown in the attached drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the system for reducing the wear of the flue gas blower and the pipeline according to the present invention includes a boiler 1, a flue gas extraction port 2, a heating surface 3 at the rear of the boiler, a flue gas flow measuring device 4, a flue gas pressure measuring device 5, a flue gas temperature measuring device 6, a cyclone separator 7, a flue gas flow adjusting door 8, a gas lock 9, a negative pressure adjusting door 10, an ash conveying device 11, and a flue gas blower 12;
be provided with boiler afterbody in boiler 1's the afterbody flue and receive hot face 3, be provided with stove cigarette extraction mouth 2 on boiler 1's the afterbody flue, wherein, stove cigarette extraction mouth 2 and boiler afterbody receive hot face 3 and distribute along flue gas flow direction in proper order, stove cigarette extraction mouth 2 is linked together with cyclone 7's entry, and cyclone 7's bottom export is linked together through airlock 9 and ash conveyor 11's entry, and cyclone 7's top export is divided into two the tunnel behind stove cigarette flow measurement device 4, stove cigarette pressure measurement device 5, stove cigarette temperature measurement device 6, the flue gas flow accent door 8, and wherein is linked together with stove cigarette fan 12's entry all the way, and another way is linked together through negative pressure regulation accent door 10 and ash conveyor 11.
The utility model discloses a theory of operation does:
the reliability of operation of the furnace fume fan 12 determines the stability of the flue gas recirculation system, the coal mill drying capacity and explosion protection system, the boiler NOx reduction system, and the sludge blending combustion system. However, the fume fan 12 is a rotary machine, the conveying medium is flue gas generated by burning raw coal, and the flue gas contains a large amount of ash in the raw coal, so that the working condition of the fume fan 12 is very poor. For reducing stove smoke fan 12 and pipeline wearing and tearing, prolong the life-span of stove smoke fan 12 and pipeline and reduce and overhaul work load, reinforcing system stability and reliability, install cyclone 7 additional at stove smoke fan 12's entrance, cyclone 7's mounted position is close to more and takes out the stove mouth, and the protective range to the reducing wear of follow-up equipment is big more. High-temperature furnace smoke containing high-concentration dust tangentially enters the cyclone separator 7, under the action of centrifugal force, 85-90% of ash particles with large particle size and strong abrasiveness are separated from gas-solid two-phase flow and enter the lower gas locker 9, after the ash particles reach a certain weight, the gas locker 9 acts, and the formed ash column and the gas locker 9 jointly play a role in preventing airflow from flowing back into the cyclone separator 7 so as to avoid damaging a flow field in the rotary separator and achieve the aim of ensuring the separation effect of the cyclone separator 7. The shell of the ash conveying system is connected with the inlet of the furnace smoke fan 12 through a pipeline, so that the interior of the ash conveying system is kept in a micro negative pressure state, the negative pressure is adjusted by a negative pressure adjusting valve 10 on the pipeline, and ash particles are prevented from flying to the external environment to pollute the atmosphere and the working environment. 10-15% of ash particles with small particle size and weak abrasiveness leave from an outlet of the cyclone separator 7 along with the flue gas, enter the furnace flue gas fan 12 under the suction of the furnace flue gas fan 12, the flue gas volume is adjusted by a flue gas flow adjusting door 8 according to the requirements of a process system, and the flue gas flow, the temperature and the pressure are measured by a measuring device to provide parameters for a control system.
Claims (8)
1. A system for reducing the abrasion of a furnace smoke fan and a pipeline is characterized by comprising a boiler (1), a cyclone separator (7), an air locker (9), an ash conveying device (11) and a furnace smoke fan (12);
be provided with stove smoke extraction mouth (2) on the afterbody flue of boiler (1), stove smoke extraction mouth (2) are linked together with cyclone (7) s entry, and cyclone (7) s bottom export is linked together through airlock (9) and ash conveyor (11)'s entry, and cyclone (7) s top export is divided into two the tunnel, and wherein is linked together with the entry of stove smoke blower (12) all the way, and another way is linked together with ash conveyor (11).
2. The system for reducing the wear of the flue gas blower and the pipeline of the boiler according to claim 1, characterized in that a boiler tail heating surface (3) is arranged in a tail flue of the boiler (1).
3. The system for reducing the wear of the flue gas blower and the pipeline of the boiler as recited in claim 2, wherein the flue gas extraction opening (2) and the heating surface (3) at the tail part of the boiler are distributed in sequence along the flow direction of the flue gas.
4. The system for reducing the wear of the fume fan and the pipeline according to claim 1, characterized in that the top outlet of the cyclone separator (7) is divided into two paths after passing through the fume flow measuring device (4).
5. System for reducing the wear of fume blowers and pipelines according to claim 4, characterized in that the top outlet of the cyclone (7) is branched into two paths after passing through the fume flow measuring device (4) and the fume pressure measuring device (5).
6. The system for reducing the wear of the furnace smoke blower and the pipeline according to claim 5, wherein the top outlet of the cyclone separator (7) is divided into two paths after passing through the furnace smoke flow measuring device (4), the furnace smoke pressure measuring device (5) and the furnace smoke temperature measuring device (6).
7. The system for reducing the wear of the furnace smoke blower and the pipeline according to claim 6, wherein the top outlet of the cyclone separator (7) is divided into two paths after passing through a furnace smoke flow measuring device (4), a furnace smoke pressure measuring device (5), a furnace smoke temperature measuring device (6) and a smoke flow adjusting valve (8).
8. The system for reducing the wear of flue gas blowers and pipelines according to claim 1, wherein the top outlet of the cyclone separator (7) is in communication with the ash conveying device (11) via a negative pressure regulating damper (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853292.XU CN217978858U (en) | 2022-07-18 | 2022-07-18 | System for reduce stove smoke fan and pipeline wearing and tearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853292.XU CN217978858U (en) | 2022-07-18 | 2022-07-18 | System for reduce stove smoke fan and pipeline wearing and tearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217978858U true CN217978858U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221853292.XU Active CN217978858U (en) | 2022-07-18 | 2022-07-18 | System for reduce stove smoke fan and pipeline wearing and tearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217978858U (en) |
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2022
- 2022-07-18 CN CN202221853292.XU patent/CN217978858U/en active Active
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