CN112283681A - Angle tube boiler with tail quenching heating surface - Google Patents
Angle tube boiler with tail quenching heating surface Download PDFInfo
- Publication number
- CN112283681A CN112283681A CN202011221547.6A CN202011221547A CN112283681A CN 112283681 A CN112283681 A CN 112283681A CN 202011221547 A CN202011221547 A CN 202011221547A CN 112283681 A CN112283681 A CN 112283681A
- Authority
- CN
- China
- Prior art keywords
- flue
- water
- wall
- heating surface
- tail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/101—Tubes having fins or ribs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses an angle tube boiler with tail quenching heating surface, comprising: a boiler body and a steam drum; the boiler body includes: the partition wall type water-cooled wall divides the water-cooled wall flue into a first water-cooled wall flue with a first ash bucket and a second water-cooled wall flue with a second ash bucket; the inlet flue is connected to the lower end part of the first water-cooled wall flue, a slag condensing pipe is arranged at the upper part of the partition wall type water-cooled wall, the connecting flue is connected with the second ash bucket and the lower end part of the tail quenching heating surface flue, and the smoke exhaust flue is connected to the upper end part of the tail quenching heating surface flue; the upper end and the lower end of a water wall flue are respectively provided with a first upper collecting box and a first lower collecting box, and the upper end and the lower end of a tail quenching heating surface flue are respectively provided with a second upper collecting box and a second lower collecting box; the steam drum, the pipeline, the first upper collecting box and the first lower collecting box form an angle pipe frame structure. The pot has low manufacturing cost, is not easy to generate the phenomenon of dust accumulation and blockage, and can quickly cool the flue gas.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to an angle tube type boiler with a tail quenching heating surface.
Background
Hazardous waste refers to waste that poses a significant threat to human health or the environment when handled, stored, transported, handled, and disposed of improperly. With the rapid development of industry, the discharge of dangerous waste in industrial production process is increasing. At present, hazardous waste is treated mainly by two treatment modes, namely landfill and incineration, and the treatment modes of landfill need more fields and are difficult to meet the requirement of environmental protection, so that the treatment modes of a lot of hazardous waste are more inclined to the incineration treatment mode.
At present, the high temperature flue gas that produces after the hazardous waste burns all adopts traditional water-cooled wall boiler to carry out waste heat and collects, and traditional water-cooled wall boiler has following defect:
firstly, the boiler and the steam drum are supported and fixed by a steel frame, the water-cooled wall is suspended and fixed by a suspension structure at the upper part of the steel frame, and the total load of the steel frame is large, so that the steel amount used by the steel frame is large, and the manufacturing cost of the boiler can be greatly increased;
secondly, a tube bundle heating surface is arranged in the water-cooled wall, and because the distance between the tubes of the tube bundle is small, the high-temperature smoke contains fused high-temperature ash particles which are easily adhered to the tube bundle heating surface, the phenomenon of ash deposition and blockage is easily generated, and the normal operation of the boiler is influenced;
thirdly, the smoke in the boiler is rapidly cooled to 200 ℃ by adopting water spraying when the temperature is 500 ℃, which wastes heat and water source.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the utility model provides a simple structure is compact, low in manufacturing cost, difficult production deposition blocking phenomenon, and can cool off the flue gas fast within two seconds from 500 ℃ to 200 ℃ with tail portion rapid cooling heating surface's angle tube boiler.
In order to solve the problems, the invention adopts the technical scheme that: the angle tube boiler with the tail quenching heating surface comprises: a boiler body and a steam drum; the structure of the boiler body comprises: a wall type water wall flue and a tail quenching heating surface flue are arranged around the inner cavity, the tail quenching heating surface flue is positioned behind the water wall flue, the steam pocket is arranged at the corner part above the rear side of the water wall flue, and a vertical tube bundle is arranged in a cavity of the tail quenching heating surface flue; the middle part of the water wall flue is vertically provided with a partition wall type water wall, the partition wall type water wall divides the water wall flue into a front vertical flue and a rear vertical flue with independent cavities: the system comprises a first water-cooled wall flue and a second water-cooled wall flue, wherein a first ash bucket is fixedly arranged at an opening at the bottom of the first water-cooled wall flue, a first ash valve is arranged at an ash outlet of the first ash bucket, a second ash bucket is fixedly arranged at an opening at the bottom of the second water-cooled wall flue, a second ash valve is arranged at an ash outlet of the second ash bucket, a third ash bucket is fixedly arranged at an opening at the bottom of the tail quenching heating surface flue, and a third ash valve is arranged at an ash outlet of the third ash bucket; the inlet flue is communicated with the inner cavity of the first water-cooled wall flue through a through hole at the lower end part of the first water-cooled wall flue, a slag condensing pipe for communicating the cavity of the first water-cooled wall flue with the cavity of the second water-cooled wall flue is arranged at the upper part of the partition wall type water-cooled wall, a connecting flue is arranged on the second ash bucket, the connecting flue is communicated with the inner cavity of the tail quenching heating surface flue through a through hole at the lower end part of the tail quenching heating surface flue, and the smoke exhaust flue is communicated with the inner cavity of the tail quenching heating surface flue through a through hole at the upper end part of the tail quenching heating surface; the lower part of the partition wall type water-cooled wall is also provided with a smoke bypass valve mechanism which ensures whether the lower cavity of the first water-cooled wall flue is communicated with the lower cavity of the second water-cooled wall flue;
the upper part of the water wall flue is provided with a first upper header communicated with the wall type water wall and the partition wall type water wall, the lower part of the water wall flue is provided with a first lower header communicated with the wall type water wall and the partition wall type water wall, and the first lower header is provided with a supporting structure for supporting the water wall flue on a concrete platform for installing a boiler; a second upper header communicated with the tube bundle is arranged at the upper part of the tail quenching heating surface flue, and a second lower header communicated with the tube bundle is arranged at the lower part of the tail quenching heating surface flue; the steam drum is provided with a water inlet, a water outlet descending pipe orifice, a steam-water mixture inlet and a saturated steam outlet, the water outlet descending pipe orifice of the steam drum is respectively communicated with two first descending pipes and one second descending pipe, the two first descending pipes are respectively distributed at two corners behind a water wall flue, the two first descending pipes are respectively communicated with the inner cavity of the first lower header, the second descending pipes are communicated with the inner cavity of the second lower header, the steam-water mixture inlet of the steam drum is respectively communicated with the inner cavity of the first upper header and the ascending pipes, and the ascending pipes are communicated with the inner cavity of the second upper header; two corner parts in front of a water wall flue are respectively and vertically provided with a steam-water recirculation pipe, the tops of the two steam-water recirculation pipes are respectively communicated with an inner cavity of a first upper header, and the lower parts of the steam-water recirculation pipes are respectively communicated with an inner cavity of a first lower header; the steam drum, the two first descending pipes, the two steam-water recirculation pipes, the first upper header and the first lower header form an angle pipe frame structure.
Further, in the corner tube boiler with the tail quenching heating surface, a steam-water mixture inlet on the steam pocket is respectively communicated with the inner cavity of the first upper header, the gas collecting pipe and the ascending pipe, a plurality of branch gas collecting pipes are arranged on the gas collecting pipe at intervals, and each branch gas collecting pipe is respectively communicated with the inner cavity of the first upper header.
Further, in the corner tube boiler with the tail quenching heating surface, the tube bundle arranged in the inner cavity of the tail quenching heating surface flue is composed of a plurality of vertically arranged fin tubes, the tops of the fin tubes are communicated with the inner cavity of the second upper header, and the bottoms of the fin tubes are communicated with the inner cavity of the second lower header.
Further, in the corner tube boiler with the tail quenching heating surface, the vertically arranged fin tubes are uniformly arranged in the inner cavity of the tail quenching heating surface flue at intervals in a rectangular array mode.
Further, the corner tube boiler with the tail quenching heating surface is characterized in that a plurality of first shock wave soot blowers used for blowing soot on the water wall heating surface in the first water wall flue are arranged on the first water wall flue at intervals along the flowing direction of the flue gas; a plurality of second shock wave soot blowers used for blowing soot on the water-cooled wall heating surface of the second water-cooled wall flue are arranged on the second water-cooled wall flue at intervals along the flue gas flowing direction; and a plurality of third shock wave soot blowers used for blowing soot on the heating surface of the tube bundle are arranged on the tail quenching heating surface flue at intervals along the flowing direction of the flue gas.
Further, the corner tube boiler with the tail quenching heating surface is characterized in that at least one maintenance manhole is arranged on each of the first water-cooled wall flue and the second water-cooled wall flue.
The invention has the beneficial effects that: firstly, a water-cooled wall flue is supported on a concrete platform for mounting a boiler through a supporting structure, and a steam pocket, two first descending pipes, two steam-water recirculation pipes, a first upper header and a first lower header form a stable corner pipe frame structure, so that the water-cooled wall and the steam pocket do not need to be supported or suspended on a steel frame, the steel frame arranged outside the boiler does not bear the weight of the water-cooled wall flue and the steam pocket, the steel frame platform is only used for operating and maintaining the daily boiler, the load of the steel frame is greatly reduced, and the steel consumption is greatly reduced, thereby the manufacturing cost of the boiler is reduced; secondly, the first water-cooled wall flue and the second water-cooled wall flue adopt cavity structures, and the flow velocity of flue gas in the cavities is low, so that most of molten high-temperature ash particles in the high-temperature flue gas have enough time to be fully cooled from a molten state to a solid state and settle into the first ash bucket or the second ash bucket, and the probability of ash deposition and blockage is greatly reduced; the tube bundle structure in the inner cavity of the tail quenching heating surface flue can improve the smoke speed, and carry ash out of the tube bundle heating surface through high smoke speed as much as possible, and the heating surface of the tube bundle structure is large, so that smoke entering the inner cavity of the tail quenching heating surface flue longitudinally scours the heating surfaces of the fin tubes, can quickly cool the smoke from 500 ℃ to 200 ℃ in two seconds, and reduces the generation amount of dioxin; when the low-load work is carried out, the smoke bypass valve mechanism is opened, so that part of smoke in the smoke entering the lower cavity of the first water-cooled wall flue directly enters the inner cavity of the tail quenching heating surface flue through the smoke bypass valve mechanism, the lower cavity of the second water-cooled wall flue and the connecting flue, the temperature of the smoke entering the inner cavity of the tail quenching heating surface flue is increased, the temperature of the smoke entering the inner cavity of the tail quenching heating surface flue is ensured to be not lower than 500 ℃, the generation amount of dioxin is reduced, and the low-temperature corrosion phenomenon is avoided; and fifthly, the arrangement of each first shock wave soot blower, each second shock wave soot blower and each third shock wave soot blower greatly reduces the adhesion phenomenon of ash on the heating surface of the water-cooled wall and the heating surface of the tube bundle, and further reduces the probability of ash deposition and blockage.
Drawings
FIG. 1 is a schematic structural diagram of an angle tube boiler with a tail quenching heating surface according to the present invention.
Fig. 2 is a schematic view of a portion of the structure in the top view of fig. 1.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 and fig. 2, the corner tube boiler with tail quenching heating surface according to this embodiment includes: boiler body and steam pocket. The structure of the boiler body comprises: the periphery of the inner cavity is provided with a wall type water wall flue 1 and a tail quenching heating surface flue 2 positioned behind the water wall flue 1, the steam pocket 5 is arranged at the upper corner part of the rear side of the water wall flue 1, and a vertical tube bundle is arranged in a cavity of the tail quenching heating surface flue 2. The middle part of the water wall flue 1 is vertically provided with a partition wall type water wall 13, the partition wall type water wall 13 divides the cavity of the water wall flue 1 into a front vertical flue and a rear vertical flue with independent cavities: the first water-cooled wall flue 11 and the second water-cooled wall flue 12 share a partition wall type water-cooled wall 13, the partition wall type water-cooled wall 13 is heated on two sides, the wall type water-cooled wall and the partition wall type water-cooled wall 13 in the front of the water-cooled wall flue 1 form a water-cooled wall heating surface of the first water-cooled wall flue 11, the wall type water-cooled wall and the partition wall type water-cooled wall 13 in the rear of the water-cooled wall flue 1 form a water-cooled wall heating surface of the second water-cooled wall flue 12, and the wall type water-cooled wall and the partition wall type water-cooled wall 13 in the first water-cooled wall flue 11 and the second water-cooled wall flue 12 adopt a module structure to leave a factory, so that the field installation workload can be reduced.
As shown in fig. 1, in the present embodiment, a first ash bucket 111 communicating with the inner cavity of the first water wall flue 11 is fixedly provided at the bottom opening of the first water wall flue 11, a first ash discharge valve is provided at the ash outlet of the first ash bucket 111, a second ash bucket 121 communicating with the inner cavity of the second water wall flue 12 is fixedly provided at the bottom opening of the second water wall flue 12, a second ash discharge valve is provided at the ash outlet of the second ash bucket 121, a third ash bucket 21 communicating with the inner cavity of the tail quenching heating surface flue 2 is fixedly provided at the bottom opening of the tail quenching heating surface flue 2, and a third ash discharge valve is provided at the ash outlet of the third ash bucket 21.
As shown in fig. 1, in the present embodiment, the inlet flue 3 is communicated with the inner cavity of the first water-cooled wall flue 11 through a through hole at the lower end of the first water-cooled wall flue 11, a slag condensation pipe communicating the cavity of the first water-cooled wall flue 11 with the cavity of the second water-cooled wall flue 12 is arranged at the upper part of the bulkhead type water-cooled wall 13, a connecting flue 6 is arranged on the second ash bucket 121, the connecting flue 6 is communicated with the inner cavity of the tail quenching heating surface flue 2 through a through hole at the lower end of the tail quenching heating surface flue 2, and the smoke exhaust flue 4 is communicated with the inner cavity of the tail quenching heating surface flue 2 through a through hole at the upper end of the tail quenching heating surface flue. The lower part of the partition wall type water cooled wall 13 is also provided with a smoke bypass valve mechanism 7 which can ensure that the lower cavity of the first water cooled wall flue 11 is communicated with the lower cavity of the second water cooled wall flue 12, the smoke bypass valve mechanism 7 adopts a high temperature resistant smoke bypass valve mechanism which can adjust the size of the valve opening, and the smoke bypass valve mechanism belongs to a conventional structure, so the description is omitted. As long as the flue gas bypass valve mechanism 7 is opened, part of the high-temperature flue gas entering the lower cavity of the first water-cooled wall flue 11 from the inlet flue 3 can directly enter the lower cavity of the second water-cooled wall flue 12 through the valve opening of the flue gas bypass valve mechanism 7 and is mixed with the flue gas flowing downwards from the upper cavity of the second water-cooled wall flue 12. The high-temperature flue gas flow directly passing through the flue gas bypass valve mechanism 7 is related to the size of a valve opening of the flue gas bypass valve mechanism 7, so that the temperature of the flue gas entering the inner cavity of the tail heating surface flue 2 can be conveniently controlled. After the flue gas bypass valve mechanism 7 is closed, all high-temperature flue gas entering the lower cavity of the first water wall flue 11 from the inlet flue 3 flows upwards, then enters the upper cavity of the second water wall flue 12 from the top of the second water wall flue 12 through the slag condensing pipe, flows downwards, then enters the lower cavity of the tail quenching heating surface flue 2 through the connecting flue 6, flows upwards and then is discharged through the connecting flue 6.
As shown in fig. 1, in this embodiment, a first upper header 14 communicating with the wall-type water-cooled wall and the partition-type water-cooled wall 13 is disposed at an upper portion of the water-cooled wall flue 11, a first lower header 15 communicating with the wall-type water-cooled wall and the partition-type water-cooled wall 13 is disposed at a lower portion of the water-cooled wall flue 11, and a support structure for supporting the water-cooled wall flue 11 on a concrete platform for mounting a boiler is disposed on the first lower header 15. The upper part of the tail quenching heating surface flue 2 is provided with a second upper header 22 communicated with the tube bundle, and the lower part of the tail quenching heating surface flue 2 is provided with a second lower header 23 communicated with the tube bundle. The steam drum 5 is provided with a water inlet, a water outlet descending pipe orifice, a steam-water mixture inlet and a saturated steam outlet, the water outlet descending pipe orifice of the steam drum 5 is respectively communicated with two first descending pipes 81 and one second descending pipe 82, the two first descending pipes 81 are respectively distributed at two corners behind the water wall flue 11, the two first descending pipes 11 are respectively communicated with the inner cavity of the first lower header 15, the second descending pipes 82 are communicated with the inner cavity of the second lower header 23, the steam-water mixture inlet of the steam drum 5 is respectively communicated with the inner cavity of the first upper header 14 and the ascending pipe 83, and the ascending pipe 83 is communicated with the inner cavity of the second upper header 22. Two corner parts in front of the water wall flue 11 are respectively and vertically provided with a steam-water recirculation pipe 84, the top parts of the two steam-water recirculation pipes 84 are communicated with the inner cavity of the first upper header 14, and the lower parts of the two steam-water recirculation pipes 84 are communicated with the inner cavity of the first lower header 15. The steam drum 5, the two first descending pipes 81, the two steam-water recirculation pipes 84, the first upper header 14 and the first lower header 15 form an angle pipe frame structure.
As shown in fig. 1, in the present embodiment, a gas collecting pipe 85 is further added on the basis of the above, specifically: the steam-water mixture inlet on the steam pocket 5 is respectively communicated with the inner cavity of the first upper header 14, the gas collecting pipe 85 and the ascending pipe 83, a plurality of branch gas collecting pipes 86 are arranged on the gas collecting pipe 85 at intervals, and each branch gas collecting pipe 86 is respectively communicated with the inner cavity of the first upper header 14. At this time, a portion of the steam-water mixture in the inner cavity of the first upper header 14 directly enters the steam-water mixture inlet of the steam drum 5, and another portion of the steam-water mixture in the inner cavity of the first upper header 14 passes through the branch gas collecting pipes 86 and the gas collecting pipe 85 and then enters the steam-water mixture inlet of the steam drum 5.
As shown in fig. 2, in the present embodiment, the tube bundle disposed in the inner cavity of the tail quenching heated surface flue 2 is composed of a plurality of vertically arranged finned tubes 24, the top of each finned tube 24 is communicated with the inner cavity of the second upper header 22, and the bottom of each finned tube 24 is communicated with the inner cavity of the second lower header 23. The vertically arranged finned tubes 24 are uniformly arranged in the inner cavity of the tail quenching heating surface flue 2 at intervals in a rectangular array mode.
In order to reduce the influence of ash deposition on the heating surface of the water-cooled wall and the heating surface of the tube bundle on indirect heat exchange between water and flue gas, as shown in fig. 1, in the embodiment, a plurality of first shock wave soot blowers 91 for blowing the heating surface of the water-cooled wall of the first water-cooled wall flue 11 are arranged on the first water-cooled wall flue 11 at intervals along the flow direction of the flue gas; a plurality of second shock wave soot blowers 92 for blowing soot on the water-cooled wall heating surface of the second water-cooled wall flue 12 are arranged on the second water-cooled wall flue 12 at intervals along the flue gas flowing direction; a plurality of third shock wave soot blowers 93 for blowing soot on the tube bundle heating surface are arranged on the tail quenching heating surface flue 2 at intervals along the flow direction of the flue gas. Each first shock wave soot blower 91, each second shock wave soot blower 92 and each third shock wave soot blower 93 can adopt automatic control to perform timing shock wave soot blowing so as to meet the requirement of outlet smoke temperature.
As shown in fig. 1, in the present embodiment, at least one service manhole 100 is provided on each of the first water wall flue 11 and the second water wall flue 12.
The flue gas flow of the corner tube boiler with the tail quenching heating surface is as follows: high-temperature flue gas generated by combustion of the hazardous waste combustion furnace enters a lower inner cavity of the first water-cooled wall flue 11 through the inlet flue 3 and flows upwards, the flue gas flows into an upper inner cavity of the second water-cooled wall flue 12 from the top of the second water-cooled wall flue 12 through the slag condensing tube after indirectly exchanging heat with water in a water-cooled wall heated surface tube in the first water-cooled wall flue 11 in the flowing process, then flows downwards, the flue gas indirectly exchanges heat with water in the water-cooled wall heated surface tube in the second water-cooled wall flue 12 in the flowing process, then enters a lower inner cavity of the tail quenching surface flue 2 through the connecting flue 6 and flows upwards, and the flue gas indirectly exchanges heat with water in the tube bundle in the flowing process and then is discharged through the connecting flue 6.
When a low-load working condition occurs, the flue gas bypass valve mechanism 7 is opened, and high-temperature flue gas generated by burning of the hazardous waste combustion furnace enters the inner cavity of the lower part of the first water wall flue 11 through the inlet flue 3 and then is divided into two paths:
one path of the flue gas enters an inner cavity of the first water-cooled wall flue 11 and flows upwards, the flue gas indirectly exchanges heat with water in a water-cooled wall heating surface tube in the first water-cooled wall flue 11 in the flowing process, then flows downwards from an upper inner cavity of the second water-cooled wall flue 12 at the top of the second water-cooled wall flue 12 through a slag condensing tube, and the flue gas indirectly exchanges heat with water in a water-cooled wall heating surface tube in the second water-cooled wall flue 12 in the flowing process, and then enters a lower inner cavity of the tail quenching heating surface flue 2 through the connecting flue 6.
The other path directly passes through a flue gas bypass valve mechanism 7, a lower cavity of a second water wall flue 12 and a connecting flue 6 and enters a lower inner cavity of a tail quenching heating surface flue 2.
The two paths of the flue gas are collected in the lower inner cavity of the tail quenching heating surface flue 2 and flow upwards, and the flue gas is discharged through the connecting flue 6 after indirectly exchanging heat with water in the tube bundle in the flowing process of the flue gas.
The water vapor flow of the corner tube type boiler with the tail quenching heating surface is as follows: water, typically at 104 ℃, enters the steam drum 5 through the water inlet of the steam drum 5 and is then split into two paths through the water outlet downcomer opening of the steam drum 5:
one path enters an inner cavity of the first lower header 15 through two first lower pipes 81 and then flows upwards into the pipes of the wall type water-cooled wall and the partition wall type water-cooled wall 13 respectively, at the moment, water in the water-cooled wall heating surface pipe in the first water-cooled wall flue 11 absorbs heat in smoke in the inner cavity of the first water-cooled wall flue 11 and then enters the first upper header 14, water in the water-cooled wall heating surface pipe in the second water-cooled wall flue 12 absorbs heat in smoke in the inner cavity of the second water-cooled wall flue 12 and then also enters the first upper header 14, a part of steam-water mixture in the first upper header 14 directly enters the steam pocket 5, and the other part of the steam-water mixture enters the steam pocket 5 through the branch gas collecting pipe 16 and the gas collecting pipe 85.
The other path enters the inner cavity of the second lower header 23 through a second downcomer 82, then flows upwards into the tube bundle, absorbs the heat in the flue gas in the inner cavity of the tail quenching heating surface flue 2, then enters the second upper header 22, and the steam-water mixture in the second upper header 22 enters the steam pocket 5 through an ascending tube 85.
The steam-water mixture entering the steam drum 5 is subjected to steam-water separation by a steam-water separator device in the steam drum 5, and the separated saturated steam is output to a gas utilization point through a steam outlet of the steam drum 5.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.
The invention has the advantages that: firstly, a water-cooled wall flue 1 is supported on a concrete platform for mounting a boiler through a supporting structure, and a steam drum 5, two first descending pipes 81, two steam-water recirculation pipes 84, a first upper header 14 and a first lower header 15 form a stable angle pipe frame structure, so that the water-cooled wall and the steam drum 5 do not need to be supported or hung on a steel frame, the steel frame arranged outside the boiler does not bear the weight of the water-cooled wall flue 1 and the steam drum 5, the steel frame platform is only used for operating and maintaining the daily boiler, the load of the steel frame is greatly reduced, the steel consumption can be greatly reduced, and the manufacturing cost of the boiler is reduced; secondly, high-temperature flue gas entering the lower inner cavity of the first water-cooled wall flue 11 through the inlet flue 3 is mainly radiated, the high-temperature flue gas contains fused high-temperature ash particles and is easy to adhere to the heated surface of the water-cooled wall, and the first water-cooled wall flue 11 and the second water-cooled wall flue 12 adopt cavity structures, and the flow rate of the flue gas in the cavities is low, so that the high-temperature flue gas entering the cavities of the first water-cooled wall flue 11 and the second water-cooled wall flue 12 has enough time for completely cooling most of the fused high-temperature ash particles in the high-temperature flue gas from a fused state to a solid state and settling in the first ash bucket 111 or the second ash bucket 121, and the probability of ash deposition and blockage is greatly reduced; the tube bundle structure in the inner cavity of the tail quenching heating surface flue 2 can improve the smoke velocity, carry ash out of the tube bundle heating surface through high smoke velocity as much as possible, has a large heating surface, and can longitudinally scour the heating surfaces of the fin tubes by smoke entering the inner cavity of the tail quenching heating surface flue 2, so that the smoke can be rapidly cooled from 500 ℃ to 200 ℃ in two seconds, and the generation amount of dioxin is reduced; when the low-load work is carried out, the smoke bypass valve mechanism 7 is opened, so that part of smoke in the smoke entering the lower cavity of the first water-cooled wall flue 11 directly enters the lower inner cavity of the tail quenching heating surface flue 2 through the smoke bypass valve mechanism 7, the lower cavity of the second water-cooled wall flue 12 and the connecting flue 6, the temperature of the smoke entering the inner cavity of the tail quenching heating surface flue 2 is increased, the temperature of the smoke entering the inner cavity of the tail quenching heating surface flue 2 is ensured to be not lower than 500 ℃, the generation amount of dioxin is reduced, and the low-temperature corrosion phenomenon is avoided; and fifthly, the arrangement of each first shock wave soot blower 91, each second shock wave soot blower 92 and each third shock wave soot blower 93 greatly reduces the adhesion phenomenon of ash on the heating surface of the water wall and the heating surface of the tube bundle, and further reduces the probability of ash deposition and blockage.
Claims (6)
1. An angle tube boiler with tail quenching heating surface, comprising: a boiler body and a steam drum; the method is characterized in that: the structure of the boiler body comprises: a wall type water wall flue and a tail quenching heating surface flue are arranged around the inner cavity, the tail quenching heating surface flue is positioned behind the water wall flue, the steam pocket is arranged at the corner part above the rear side of the water wall flue, and a vertical tube bundle is arranged in a cavity of the tail quenching heating surface flue; the middle part of the water wall flue is vertically provided with a partition wall type water wall, the partition wall type water wall divides the water wall flue into a front vertical flue and a rear vertical flue with independent cavities: the system comprises a first water-cooled wall flue and a second water-cooled wall flue, wherein a first ash bucket is fixedly arranged at an opening at the bottom of the first water-cooled wall flue, a first ash valve is arranged at an ash outlet of the first ash bucket, a second ash bucket is fixedly arranged at an opening at the bottom of the second water-cooled wall flue, a second ash valve is arranged at an ash outlet of the second ash bucket, a third ash bucket is fixedly arranged at an opening at the bottom of the tail quenching heating surface flue, and a third ash valve is arranged at an ash outlet of the third ash bucket; the inlet flue is communicated with the inner cavity of the first water-cooled wall flue through a through hole at the lower end part of the first water-cooled wall flue, a slag condensing pipe for communicating the cavity of the first water-cooled wall flue with the cavity of the second water-cooled wall flue is arranged at the upper part of the partition wall type water-cooled wall, a connecting flue is arranged on the second ash bucket, the connecting flue is communicated with the inner cavity of the tail quenching heating surface flue through a through hole at the lower end part of the tail quenching heating surface flue, and the smoke exhaust flue is communicated with the inner cavity of the tail quenching heating surface flue through a through hole at the upper end part of the tail quenching heating surface; the lower part of the partition wall type water-cooled wall is also provided with a smoke bypass valve mechanism which ensures whether the lower cavity of the first water-cooled wall flue is communicated with the lower cavity of the second water-cooled wall flue;
the upper part of the water wall flue is provided with a first upper header communicated with the wall type water wall and the wall type water wall, the lower part of the water wall flue is provided with a first lower header communicated with the wall type water wall and the wall type water wall, and the first lower header is provided with a supporting structure for supporting the water wall flue on a concrete platform for installing a boiler; a second upper header communicated with the tube bundle is arranged at the upper part of the tail quenching heating surface flue, and a second lower header communicated with the tube bundle is arranged at the lower part of the tail quenching heating surface flue; the steam drum is provided with a water inlet, a water outlet descending pipe orifice, a steam-water mixture inlet and a saturated steam outlet, the water outlet descending pipe orifice of the steam drum is respectively communicated with two first descending pipes and one second descending pipe, the two first descending pipes are respectively distributed at two corners behind a water wall flue, the two first descending pipes are respectively communicated with the inner cavity of the first lower header, the second descending pipes are communicated with the inner cavity of the second lower header, the steam-water mixture inlet of the steam drum is respectively communicated with the inner cavity of the first upper header and the ascending pipes, and the ascending pipes are communicated with the inner cavity of the second upper header; two corner parts in front of a water wall flue are respectively and vertically provided with a steam-water recirculation pipe, the tops of the two steam-water recirculation pipes are respectively communicated with an inner cavity of a first upper header, and the lower parts of the steam-water recirculation pipes are respectively communicated with an inner cavity of a first lower header; the steam drum, the two first descending pipes, the two steam-water recirculation pipes, the first upper header and the first lower header form an angle pipe frame structure.
2. The corner tube boiler with tail quenching heating surface as claimed in claim 1, characterized in that: the steam-water mixture inlet on the steam pocket is respectively communicated with the inner cavity of the first upper header, the gas collecting pipes and the ascending pipe, a plurality of branch gas collecting pipes are arranged on the gas collecting pipes at intervals, and each branch gas collecting pipe is respectively communicated with the inner cavity of the first upper header.
3. The corner tube boiler with tail quenching heating surface as claimed in claim 1 or 2, characterized in that: the tube bundle arranged in the inner cavity of the tail quenching heating surface flue is composed of a plurality of vertically arranged fin tubes, the tops of the fin tubes are communicated with the inner cavity of the second upper header, and the bottoms of the fin tubes are communicated with the inner cavity of the second lower header.
4. The corner tube boiler with tail quenching heating surface as claimed in claim 3, characterized in that: the vertically arranged finned tubes are uniformly arranged in the inner cavity of the tail quenching heating surface flue at intervals in a rectangular array mode.
5. The corner tube boiler with tail quenching heating surface as claimed in claim 1 or 2, characterized in that: a plurality of first shock wave soot blowers used for blowing soot on the heating surface of the water wall in the first water wall flue are arranged on the first water wall flue at intervals along the flow direction of the flue gas; a plurality of second shock wave soot blowers used for blowing soot on the water-cooled wall heating surface of the second water-cooled wall flue are arranged on the second water-cooled wall flue at intervals along the flue gas flowing direction; and a plurality of third shock wave soot blowers used for blowing soot on the heating surface of the tube bundle are arranged on the tail quenching heating surface flue at intervals along the flowing direction of the flue gas.
6. The corner tube boiler with tail quenching heating surface as claimed in claim 1, characterized in that: and at least one maintenance manhole is respectively arranged on the first water-cooled wall flue and the second water-cooled wall flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011221547.6A CN112283681A (en) | 2020-11-05 | 2020-11-05 | Angle tube boiler with tail quenching heating surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011221547.6A CN112283681A (en) | 2020-11-05 | 2020-11-05 | Angle tube boiler with tail quenching heating surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283681A true CN112283681A (en) | 2021-01-29 |
Family
ID=74351606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011221547.6A Pending CN112283681A (en) | 2020-11-05 | 2020-11-05 | Angle tube boiler with tail quenching heating surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112283681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339837A (en) * | 2021-06-02 | 2021-09-03 | 华北电力大学 | Tube bank type castable and system for waste heat boiler of garbage power station and preparation of tube bank type castable |
-
2020
- 2020-11-05 CN CN202011221547.6A patent/CN112283681A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339837A (en) * | 2021-06-02 | 2021-09-03 | 华北电力大学 | Tube bank type castable and system for waste heat boiler of garbage power station and preparation of tube bank type castable |
| CN113339837B (en) * | 2021-06-02 | 2023-02-14 | 华北电力大学 | Tube bank type castable for waste heat boiler of garbage power station, system and preparation of tube bank type castable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015124007A1 (en) | Fluidized bed boiler with integration of multifunctional inertial gravity separators and multiple types of furnaces | |
| CN204986938U (en) | Energy -conserving dust removal troilite exhaust -heat boiler | |
| CN1664445A (en) | Liquid waste incineration waste heat boiler | |
| CN101979951B (en) | Dry dedusting and sensible heat recovery system for electric furnace flue gas | |
| CN205710804U (en) | A kind of waste-heat recovery device after Converter Residual Heat Boiler | |
| CN112283681A (en) | Angle tube boiler with tail quenching heating surface | |
| CN113464913A (en) | Wide-load-adjustable high-parameter waste incineration waste heat boiler | |
| CN213930861U (en) | Angle tube boiler with tail quenching heating surface | |
| CN215982491U (en) | Pipe frame type waste heat recovery boiler matched with garbage pyrolysis incineration system | |
| CN114184055A (en) | Cement kiln bypass air discharge waste heat boiler | |
| CN215372505U (en) | Waste water incineration waste heat recovery boiler | |
| CN213930955U (en) | Waste heat boiler capable of matching with waste incineration device | |
| CN205640887U (en) | Sediment waste heat utilization's air -cooled system at bottom of improvement circulating fluidized bed boiler | |
| CN210662816U (en) | Structure of horizontal waste incineration exhaust-heat boiler with heating surfaces arranged in three channels | |
| CN209263015U (en) | Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler steam/water circulating integrated morphology | |
| CN112393212B (en) | Waste heat boiler capable of being matched with waste incineration device | |
| CN201621719U (en) | Radiation temperature reduction cooling chamber | |
| CN205535709U (en) | Flue waste heat utilization system | |
| CN205351266U (en) | High corrosivity exhaust -heat boiler of high dust -laden of metallurgical industry high temperature | |
| CN218380528U (en) | Cement manufacture line kiln hood waste heat system of recycling | |
| CN216667633U (en) | Wide-load adjustable high-parameter waste incineration waste heat boiler | |
| CN203687352U (en) | Energy-saving environment-friendly boiler barrel longitudinally-arranged inclined push reciprocating grate hot water boiler | |
| CN214619468U (en) | Waste heat boiler for electric furnace | |
| CN212618206U (en) | Electric furnace exhaust-heat boiler | |
| CN216431771U (en) | Vaporization flue for waste heat boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |