CN110986034A - Novel fluidized bed boiler prevents stifled burnout and arranges sediment device - Google Patents
Novel fluidized bed boiler prevents stifled burnout and arranges sediment device Download PDFInfo
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- CN110986034A CN110986034A CN201911308862.XA CN201911308862A CN110986034A CN 110986034 A CN110986034 A CN 110986034A CN 201911308862 A CN201911308862 A CN 201911308862A CN 110986034 A CN110986034 A CN 110986034A
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- pipe
- slag discharging
- slag
- beating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
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Abstract
The invention discloses a novel anti-blocking and burnout-preventing slag discharging device of a fluidized bed boiler, which belongs to the technical field of boilers and is provided aiming at the defect that the existing slag discharging pipe lacks of detection means, and the slag discharging pipe is arranged in a water-cooling air chamber at the bottom of a fluidized bed combustion chamber, and the lower end of the slag discharging pipe is positioned outside the water-cooling air chamber; a detection element in the monitoring mechanism is in contact with the outer wall of the slag discharge pipe, and the transmission end of the detection element is in signal connection with remote monitoring equipment; one end of each coke beating mechanism extends into the slag discharging pipe. The invention can remotely monitor the working condition of the slag discharge pipe, timely treat the problem of slag blockage and ensure the operation safety of the boiler.
Description
The technical field is as follows:
the invention belongs to the technical field of fluidized bed boilers, and particularly relates to a novel anti-blocking and anti-burnout slag discharging device for a fluidized bed boiler.
Background art:
the slag discharging device is an important component in a fluidized bed boiler ash slag system, and common slag discharging forms comprise front slag discharging, rear slag discharging and bottom slag discharging. The slag discharging forms have advantages and disadvantages, for medium and small units, bottom slag discharging is mostly adopted, the design of the slag discharging pipeline for the bottom slag discharging in the prior art is too simple, and detection and emergency treatment means are lacked, and in the ignition process of a boiler, because the slag discharging pipeline is exposed in high-temperature flue gas for a long time, if the material of the slag discharging pipe is not properly treated in the production process, the phenomena of burning cracking and the like are easy to occur; in the running and deslagging process of the boiler, because high-temperature ash residues are always remained in the deslagging pipe, when the boiler is in improper running or the coal quality is changed, a large slag block is easily formed, so that the slag blockage phenomenon is caused. The slag pipe is blocked without reasonable detection and emergency means, and accidents such as forced boiler shutdown and the like can be caused. In view of the above problems, it is desirable to design a slag discharging pipe structure with convenient processing, easy installation, convenient maintenance, detection and emergency treatment means.
The invention content is as follows:
the invention aims to overcome the defects and provides a novel fluidized bed boiler anti-blocking and anti-burnout slag discharging device, which can remotely monitor a slag discharging pipe in real time through remote monitoring equipment, timely process the condition of slag blockage and ensure the smooth production of the boiler.
The technical scheme adopted by the invention is as follows: the utility model provides a novel fluidized bed boiler prevents stifled burnout and arranges sediment device, includes: the slag discharging pipe is arranged in a water-cooling air chamber at the bottom of the fluidized bed combustion chamber, the lower end of the slag discharging pipe is positioned outside the water-cooling air chamber, and a monitoring mechanism for detecting the temperature of the slag discharging pipe and a coking mechanism for treating slag blocks in the slag discharging pipe are arranged on the lower end of the slag discharging pipe; a detection element in the monitoring mechanism is in contact with the outer wall of the slag discharge pipe, and the transmission end of the detection element is in signal connection with remote monitoring equipment; one end of each coke beating mechanism extends into the slag discharging pipe.
Preferably, still be equipped with the cooling body who is used for carrying out the cooling treatment for the scum pipe outside the scum pipe, cooling body includes cooling jacket and coolant connecting pipe, cooling jacket sets up in the outside of scum pipe, makes and forms the cooling cavity between cooling jacket and the scum pipe, the one end and the cooling cavity intercommunication of coolant connecting pipe.
Preferably, the mechanism of coking is including beating burnt sleeve pipe and coking device, the sheathed tube one end of coking communicates with the inside cavity of row's cinder pipe, and coking device installs on beating burnt sheathed tube other end opening, coking device is including arranging the sediment stick and supporting tube seat, supporting tube seat installs on beating burnt sheathed tube opening, the one end of arranging the sediment stick is for beating the sediment end, and the other end is for holding the end, it passes the supporting tube seat and stretches into in the sleeve pipe of coking to beat the sediment end, it is outside to hold the end to be located the sleeve pipe of coking.
Preferably, the coking device further comprises a cooling air pipe and a sealing device, the cooling air pipe and the sealing device are both sleeved outside the slag discharging rod, one end of the cooling air pipe is communicated with the inside of the coking sleeve, the sealing device seals the other end of the cooling air pipe, and an air inlet pipe communicated with the cooling air pipe is further arranged on the cooling air pipe.
Preferably, sealing device is including sealed steel sheet, seal box, ceramic fiber felt and playback steel sheet, the seal box is equipped with the open-ended cuboid for one end, the ceramic fiber felt is filled in the seal box, and sealed steel sheet is fixed on the opening of seal box, the end at row sediment stick is fixed to the playback steel sheet, and when the playback steel sheet is along with row sediment stick to getting burnt sleeve pipe outside and removing, but the shutoff of playback steel sheet is on sealed steel sheet.
Preferably, the top end of the homing steel plate is a cone.
Preferably, a detachable iron chain is arranged between the slag discharging rod and the cooling air pipe.
Preferably, the coke beating mechanisms are at least two and distributed on at least one side of the slag discharge pipe, the coke beating mechanisms are distributed along the length direction of the slag discharge pipe,
preferably, when the coking mechanisms are distributed on two sides of the axis of the slag discharging pipe, the coking mechanisms are arranged in an asymmetric mode.
Preferably, monitoring mechanism includes wall temperature sleeve pipe and detecting element, wall temperature sleeve pipe's one end is linked together with the outer wall of scum pipe, detecting element is located wall temperature sleeve pipe, and detecting element's sense terminal contacts with the outer wall of scum pipe.
The invention has the beneficial effects that:
1. according to the invention, the wall temperature of the slag discharging pipe is collected and fed back in real time through the monitoring mechanism, the working condition of the slag discharging pipe can be mastered in time, and the remote monitoring function brings convenience to operators; the coking mechanism is arranged on at least one side of the installation axis of the slag discharging pipe, so that the slag bonding positions at different positions in the slag discharging pipe can be treated, and the problem of slag blockage can be timely treated;
2. the invention carries out cooling treatment on the slag discharge pipe and the coking sleeve in real time and utilizes the boiler water supply system to cool the slag discharge pipe, thereby saving the production cost;
3. the invention has reasonable structural design, can carry out detailed design and arrangement of the slag discharging pipeline according to the specific height of the water cooling chamber of the boiler, has the characteristic of large application range, is simpler in processing, production, installation and operation maintenance of each part, and can increase the safe and stable operation coefficient of the boiler compared with the traditional slag discharging pipeline.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of a focusing mechanism;
FIG. 4 is a diagram of a position body when the homing steel plate and the sealing steel plate are blocked;
wherein: the device comprises a water cooling air chamber 1, a slag discharging pipe 2, a monitoring mechanism 3, a wall temperature sleeve 31, a detection element 32, a coke beating mechanism 4, a coke beating sleeve 41, a coke beating device 42, a slag discharging rod 421, a support pipe seat 422, a cooling air pipe 423, an air inlet pipe 4231, a sealing device 424, a sealing steel plate 4241, a sealing box 4242, a ceramic fiber felt 4243, a returnable steel plate 4244, an iron chain 43, a cooling mechanism 5, a cooling sleeve 51, a cooling medium connecting pipe 52, a support plate 6 and a remote monitoring device 7.
The specific implementation mode is as follows:
as shown in FIG. 1, the invention relates to a novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device, which comprises: the slag discharging pipe 2 is arranged in a water cooling air chamber 1 at the bottom of a fluidized bed combustion chamber, the upper end of the slag discharging pipe 2 is communicated with the bottom of a slag discharging port of a boiler and is used for discharging slag for the boiler, the lower end of the slag discharging pipe 2 is positioned outside the water cooling air chamber 1 and is used for being externally connected with a slag discharging pipeline, and a monitoring mechanism 3 used for detecting the temperature of the slag discharging pipe 2, a coking mechanism 4 used for processing slag blocks in the slag discharging pipe 2 and a cooling mechanism 5 used for cooling the slag discharging pipe 2 are arranged at the lower end of the slag discharging pipe 2.
As shown in fig. 2, the cooling mechanism 5 is provided outside the slag discharging pipe 2 in the present embodiment because the cooling degree of the slag discharging pipe 2 by the water cooling plenum 1 is weak, and the slag discharging pipe 2 is easily deformed by a high temperature particularly at the time of ignition of the boiler. The cooling mechanism 5 comprises a cooling sleeve 51 and a cooling medium connecting pipe 52, the cooling sleeve 51 is concentrically sleeved outside the slag discharge pipe 2, the upper end of the cooling sleeve is connected into a water circulation system of the boiler, and the lower end of the cooling sleeve is a closed end. A supporting plate 6 is arranged between the cooling sleeve 51 and the slag discharging pipe 2, the supporting plate 6 is of a fan-shaped structure, the annular array is arranged on the outer wall of the slag discharging pipe 2, a certain interval is reserved between the adjacent supporting plates 6, and cooling media flow. A cooling cavity is formed between the cooling sleeve 51 and the slag discharge pipe 2 through the supporting plate 6, one end of the cooling medium connecting pipe 52 is communicated with the cooling cavity, the other end of the cooling medium connecting pipe is communicated with the boiler feed water through the connecting pipe, cold water in the boiler feed water continuously flows into the cooling cavity through the cooling medium connecting pipe 52, and the input cold water finally flows into a boiler water circulating system to serve as a medium of an evaporation heating surface. Through carrying out effectual cooling to the scum pipe 2 to play the purpose of protection scum pipe 2.
Monitoring mechanism 3 includes wall temperature sleeve pipe 31 and detecting element 32, wall temperature sleeve pipe 31 is hollow body, and its one end contacts with the outer pipe wall of scum pipe 2 behind the cooling jacket 51, and the other end is the open end, detecting element 32 can select for use the thermocouple, the thermocouple is placed in wall temperature sleeve pipe 31, and the sense terminal of thermocouple contacts with the outer wall of scum pipe 2, and the transmission end of thermocouple transmits temperature signal to remote monitoring equipment 7 through the teletransmission wire, and remote monitoring equipment 7 is through the scum pipe 2 wall temperature of gathering thermocouple feedback in real time, and in case scum pipe 2 wall temperature exceeds preliminary prediction settlement temperature 550 ℃, the staff then can judge that there is the risk of stifled sediment in scum pipe 2, should carry out the sediment processing immediately.
Beat burnt mechanism 4 and be at least two, and distribute in one side of row's sediment pipe 2 installation axis to along the length direction distribution of row's sediment pipe 2, every one end of beating burnt mechanism 4 all stretches into in row's sediment pipe 2, beat burnt mechanism 4 through the different positions setting and can realize carrying out row sediment processing to the different positions in row's sediment pipe 2.
The coking mechanism 4 comprises a coking sleeve 41 and a coking device 42, one end of the coking sleeve 41 penetrates through a cooling sleeve 51 to be fixed and communicated with the inner cavity of the slag discharge pipe 2, and the coking device 42 is installed on an opening at the other end of the coking sleeve 41.
As shown in fig. 1, 3 and 4, the coking device 42 includes a slag discharging rod 421, a supporting pipe seat 422, a cooling air pipe 423 and a sealing device 424, the supporting pipe seat 422 is fixedly installed on an opening of the coking sleeve 41, one end of the slag discharging rod 421 is a slag discharging end, the other end is a holding end, the slag discharging end penetrates through the supporting pipe seat 422 and extends into the coking sleeve 41, and the holding end is located outside the coking sleeve 41. The cooling air pipe 423 and the sealing device 424 are concentrically sleeved outside the slag discharging rod 421, one end of the cooling air pipe 423 penetrates through the supporting pipe seat 422 and extends into the coking sleeve 41, the outer wall of the cooling air pipe 423 is fixed in the supporting pipe seat 422, the sealing device 424 is arranged at the other end of the cooling air pipe 423, and the slag discharging rod 421 extends out of the sealing device 424. An air inlet pipe 4231 is arranged on the cooling air pipe 423 and positioned on the outer side of the slag discharging rod 421, the axis of the air inlet pipe 4231 is perpendicular to the axis of the cooling air pipe 423, one end of the air inlet pipe 4231 is communicated with the cooling air pipe 423, the other end of the air inlet pipe 4231 is communicated with a cooling air source, and the slag discharging rod 421 and the coking sleeve 41 are cooled by cooling air.
The sealing device 424 comprises a sealing steel plate 4241, a sealing box 4242, a ceramic fiber felt 4243 and a homing steel plate 4244, the sealing box 4242 is a cuboid with an opening at one end, the ceramic fiber felt 4243 is filled in the sealing box 4241, and the sealing steel plate 4241 is fixed on the opening of the sealing box 4242, so that the sealing box 4242 forms a closed structure. Since the ceramic fiber mat 4243 can maintain the volume stability under high temperature conditions in addition to having high refractoriness, it plays a role of heat insulation when the slag discharging rod 421 passes through the sealing box 4242 and the sealing steel plate 4241. The resettable steel plate 4244 is fixed at the slag tapping end of the slag tapping rod 421, and the top end of the resettable steel plate 4244 is a cone. When the resettable steel plate 4244 moves towards the outside of the coking sleeve 41 along with the slag discharging rod 421, the resettable steel plate 4244 can be plugged at one end of the cooling air pipe 423, so that fine slag particles can be prevented from falling into the cooling air pipe 423.
For convenient use, a detachable iron chain 43 is arranged between the slag discharging rod 421 and the cooling air pipe 423.
Example 2
The difference between the embodiment 2 and the embodiment 1 is only that the coking mechanisms 4 in the embodiment 2 are distributed on two sides of the installation axis of the slag discharging pipe 2 and are arranged in a left-right asymmetrical mode.
The use process comprises the following steps:
during the use, cooling body 5 carries out cooling treatment to the outer wall of scum pipe 2 all the time, and when the thermocouple in monitoring mechanism 3 gathered the wall temperature of scum pipe 2 and was greater than predetermined 550 ℃, remote monitoring equipment 7 collected the signal after, the staff immediately can carry out the sediment processing to scum pipe 2.
The operation process is as follows:
when discharging slag, the iron chain 43 is firstly separated from the slag discharging rod 421, an operator holds the holding end of the slag discharging rod 421 by hand, the slag discharging end of the slag discharging rod 421 is moved to the deep inside of the coking casing 41, before that, the cooling air pipe 423 cools the front end of the slag discharging rod 421 all the time, when coking occurs in the slag discharging pipe 2, slag discharging is performed on the slag forming position by utilizing the resettable steel plate 4244, after coking is completed, the holding end of the slag discharging rod 421 is pulled outwards until the resettable steel plate 4244 is in close contact with the sealing steel plate 4241, the mechanical plugging function after coking is completed, and fine ash particles in the slag discharging pipe 2 can be prevented from entering the cooling air pipe 423 after plugging.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a novel fluidized bed boiler prevents stifled burnout and arranges sediment device, includes: the slag discharging pipe (2) is arranged in a water cooling air chamber (1) at the bottom of the fluidized bed combustion chamber, and the lower end of the slag discharging pipe (2) is positioned outside the water cooling air chamber (1), and is characterized in that a monitoring mechanism (3) for detecting the temperature of the slag discharging pipe (2) and a coking mechanism (4) for treating slag blocks in the slag discharging pipe (2) are arranged on the lower end of the slag discharging pipe (2); a detection element (32) in the monitoring mechanism (3) is in contact with the outer wall of the slag discharge pipe (2), and the transmission end of the detection element (32) is in signal connection with the remote monitoring equipment (7); one end of each coking mechanism (4) extends into the slag discharge pipe (2).
2. The novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device as claimed in claim 1, wherein: still be equipped with in row's cinder pipe (2) outside and be used for carrying out cooling mechanism (5) of handling for row's cinder pipe (2), cooling mechanism (5) are including cooling jacket (51) and coolant connecting pipe (52), cooling jacket (51) set up in the outside of row's cinder pipe (2), make between cooling jacket (51) and the row's cinder pipe (2) form the cooling chamber, the one end and the cooling chamber intercommunication of coolant connecting pipe (52).
3. The novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device as claimed in claim 2, wherein: the coke beating mechanism (4) comprises a coke beating sleeve (41) and a coke beating device (42), one end of the coke beating sleeve (41) is communicated with the inner cavity of the slag discharge pipe (2), the coke beating device (42) is installed on the opening of the other end of the coke beating sleeve (41), the coke beating device (42) comprises a slag discharge rod (421) and a support pipe seat (422), the support pipe seat (422) is installed on the opening of the coke beating sleeve (41), one end of the slag discharge rod (421) is a slag beating end, the other end is a holding end, the slag beating end penetrates through the support pipe seat (422) and extends into the coke beating sleeve (41), and the holding end is located outside the coke beating sleeve (41).
4. The novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device as claimed in claim 3, wherein: the coke beating device (42) further comprises a cooling air pipe (423) and a sealing device (424), the cooling air pipe (423) and the sealing device (424) are both sleeved on the outer side of the slag discharging rod (421), one end of the cooling air pipe (423) is communicated with the inside of the coke beating sleeve (41), the sealing device (424) seals the other end of the cooling air pipe (423), and an air inlet pipe (4231) communicated with the cooling air pipe (423) is further arranged on the cooling air pipe (423).
5. The novel fluidized bed boiler anti-blocking and anti-burnout slag discharging device as claimed in claim 4, wherein: the sealing device (424) comprises a sealing steel plate (4241), a sealing box (4242), a ceramic fiber felt (4243) and a resettable steel plate (4244), the sealing box (4242) is a cuboid with an opening formed in one end, the ceramic fiber felt (4243) is filled in the sealing box (4241), the sealing steel plate (4241) is fixed to the opening of the sealing box (4242), the resettable steel plate (4244) is fixed to the end of the slag discharging rod (421), and when the resettable steel plate (4244) moves towards the outside of the coking sleeve (41) along with the slag discharging rod (421), the resettable steel plate (4244) can be blocked on the sealing steel plate (4241).
6. The novel fluidized bed boiler anti-blocking and anti-burnout slag discharging device as claimed in claim 5, wherein: the top end of the homing steel plate (4244) is a cone.
7. The novel fluidized bed boiler anti-blocking and anti-burnout slag discharging device as claimed in claim 4, wherein: a detachable iron chain (43) is arranged between the slag discharging rod (421) and the cooling air pipe (423).
8. The novel fluidized bed boiler anti-blocking anti-burnout slag discharging device as claimed in any one of claims 1 to 7, wherein: the coke beating mechanisms (4) are at least two and distributed on at least one side of the slag discharge pipe (2), and the coke beating mechanisms (4) are distributed along the length direction of the slag discharge pipe (2).
9. The novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device as claimed in claim 8, wherein: and the coking mechanisms (4) are arranged in an asymmetric mode when distributed on two sides of the axis of the slag discharge pipe (2).
10. The novel fluidized bed boiler anti-blocking and burnout-preventing slag discharging device as claimed in claim 8, wherein: monitoring mechanism (3) are including wall temperature sleeve pipe (31) and detecting element (32), the one end of wall temperature sleeve pipe (31) is linked together with the outer wall of row's cinder pipe (2), detecting element (32) are located wall temperature sleeve pipe (31), and the sense terminal of detecting element (32) contacts with the outer wall of row's cinder pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308862.XA CN110986034A (en) | 2019-12-18 | 2019-12-18 | Novel fluidized bed boiler prevents stifled burnout and arranges sediment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308862.XA CN110986034A (en) | 2019-12-18 | 2019-12-18 | Novel fluidized bed boiler prevents stifled burnout and arranges sediment device |
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| CN110986034A true CN110986034A (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654054A (en) * | 2021-07-27 | 2021-11-16 | 安徽斯的得电力工程有限公司 | Pipeline cooling device for coking of incinerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654054A (en) * | 2021-07-27 | 2021-11-16 | 安徽斯的得电力工程有限公司 | Pipeline cooling device for coking of incinerator |
| CN113654054B (en) * | 2021-07-27 | 2024-04-02 | 安徽斯的得电力工程有限公司 | Pipeline cooling device for burning of incinerator |
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Application publication date: 20200410 |