CN114413250B - Boiler exhaust gas waste heat degree of depth recovery unit - Google Patents
Boiler exhaust gas waste heat degree of depth recovery unit Download PDFInfo
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- CN114413250B CN114413250B CN202210074756.5A CN202210074756A CN114413250B CN 114413250 B CN114413250 B CN 114413250B CN 202210074756 A CN202210074756 A CN 202210074756A CN 114413250 B CN114413250 B CN 114413250B
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- air outlet
- outlet pipe
- heat exchange
- pipe
- boiler
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- 238000011084 recovery Methods 0.000 title claims abstract description 43
- 239000002918 waste heat Substances 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000779 smoke Substances 0.000 claims abstract description 49
- 230000002457 bidirectional effect Effects 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 50
- 239000003546 flue gas Substances 0.000 abstract description 50
- 239000008187 granular material Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
- F22D1/38—Constructional features of water and air preheating systems
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application relates to the technical field of waste heat recovery, in particular to a boiler smoke exhaust waste heat deep recovery device, which comprises an air outlet pipe, two water pipes and an adjusting mechanism; the two water-through pipes are respectively arranged close to the two opposite sides of the air outlet pipe; the water pipe comprises a heat exchange section and a connecting section; the air outlet pipe is provided with a sliding hole, and the heat exchange section is in sliding connection with the air outlet pipe; the boiler exhaust gas waste heat degree of depth recovery unit of design is convenient for insert boiler exhaust gas through the outlet duct, is convenient for absorb the heat in the flue gas through the heat exchange section, and then gives the cold water in the water pipe of leading to with the heat transfer in the flue gas, is convenient for drive linkage segment motion through adjustment mechanism, and then adjusts the length that the heat exchange section stretches into in the outlet duct, changes the motion path length of flue gas in the outlet duct, changes the dwell time of flue gas in the outlet duct, simultaneously, can scrape the flue gas granule of adhesion at heat exchange section surface with the outlet duct cooperation, improves the recovery efficiency of boiler exhaust gas waste heat.
Description
Technical Field
The application relates to the technical field of waste heat recovery, in particular to a boiler smoke exhaust waste heat deep recovery device.
Background
With the development of related technology, the household garbage incineration power generation gradually steps into the public view, a great amount of high-temperature smoke is generated in the process of burning and releasing heat energy in the boiler by the household garbage, and because the smoke contains a great amount of smoke particles, when the smoke discharging temperature of the boiler is lower than the dew point temperature of the smoke, the smoke particles in the smoke can be strongly adhered to the heat exchange surface of the boiler to influence the service efficiency of the boiler, and the smoke particles can completely cover the heat exchange surface of the boiler along with the time, so that the boiler cannot operate, and the smoke discharging temperature of the boiler is higher.
Patent document No. 201320331493.8 discloses a boiler heat recovery system comprising a burner for heating the boiler, a hot air recovery device and a hot water tank; the heat in the hot waste gas generated by the burner is recovered by a hot air recovery device; hot water generated by the hot air recovery device enters a hot water tank for storage; the hot air recovery device comprises a hot air pipe, a shell, a cold water inlet pipe and a hot water outlet pipe, wherein a plurality of hot air pipes are arranged in the shell.
For the above related technologies, the inventor considers the designed boiler heat recovery system that the flue gas exhausted by the boiler exchanges heat in the hot air pipe of the hot air recovery device, and in the process of recovering waste heat by the flue gas flowing through the hot air pipe, the temperature of the flue gas finally exhausted to the outside air may be still higher due to the adhesion of flue gas particles in the flue gas or due to too short residence time of the flue gas in the hot air pipe and other factors, which affects the recovery efficiency of the waste heat exhausted by the boiler.
Disclosure of Invention
In order to improve the recovery efficiency of the exhaust gas waste heat of the boiler, the application provides a deep recovery device of the exhaust gas waste heat of the boiler, which adopts the following technical scheme:
the boiler exhaust gas waste heat deep recovery device comprises an air outlet pipe, two water pipes and an adjusting mechanism for driving the two water pipes to move;
the air outlet pipe is connected with a smoke outlet of the boiler;
the two water-through pipes are respectively arranged close to the two opposite sides of the air outlet pipe; the water pipe comprises a plurality of heat exchange sections and a plurality of connecting sections for connecting two adjacent heat exchange sections;
the heat exchange section is connected with the connecting section;
the air outlet pipe is provided with a plurality of sliding holes for the heat exchange section to pass through, the heat exchange section is in sliding connection with the air outlet pipe, and the heat exchange section can divide the air outlet pipe into two chambers;
the adjusting mechanism is connected with the air outlet pipe, and the adjusting mechanism is connected with the connecting section.
By adopting the technical scheme, the air inlet end of the air outlet pipe is connected with the smoke outlet of the boiler, the smoke exhausted by the boiler moves in the air outlet pipe and is finally discharged to the external environment from the air outlet end of the air outlet pipe, the temperature of the smoke at the air outlet end of the air outlet pipe is detected through temperature detection equipment, an adjusting mechanism is adjusted according to the detected smoke temperature, the adjusting mechanism drives the connecting section to move in opposite directions or move in opposite directions, the connecting section drives the heat exchange section to slide along the hole wall of the sliding hole, the length of the heat exchange section extending into the air outlet pipe is changed, the length of a movement path of the smoke in the air outlet pipe is changed, the stay time of the smoke in the air outlet pipe is prolonged or shortened, meanwhile, the outer side wall of the heat exchange section is scraped with the air outlet pipe while the heat exchange section moves, smoke particles attached to the heat exchange section are scraped, and finally carried by the smoke and discharged to the external environment from the air outlet end of the air outlet pipe; introducing cold water into the connecting section, and transferring heat to the heat exchange section by the flue gas in the air outlet pipe when the cold water flows through the heat exchange section, wherein the heat exchange section transfers the heat to the cold water flowing in the heat exchange section; the designed boiler smoke exhaust waste heat deep recovery device is convenient for accessing the smoke exhausted by the boiler through the air outlet pipe; the connecting sections are convenient to connect a plurality of heat exchange sections, the heat exchange sections are convenient to absorb heat in smoke, the heat in the smoke is transferred to cold water in the water pipe, the adjusting mechanism is convenient to drive the connecting sections to move, the length of the heat exchange sections extending into the air outlet pipe is adjusted, the length of a movement path of the smoke in the air outlet pipe is changed, the residence time of the smoke in the air outlet pipe is changed, meanwhile, smoke particles attached to the surface of the heat exchange sections can be scraped by matching with the air outlet pipe, and the recovery efficiency of the waste heat of smoke discharged from a boiler is improved.
Optionally, the air outlet pipe comprises an inner shell, an outer shell and a plurality of support rods;
a heating cavity is arranged between the inner shell and the outer shell, the heating cavity is separated from the inner cavity of the sliding hole, and the air outlet end of the heating cavity is connected with the air inlet of the boiler;
the supporting rod is positioned in the heating cavity, one end of the supporting rod is connected with the inner shell, and the other end of the supporting rod is connected with the outer shell.
By adopting the technical scheme, the room temperature air introduced into the boiler is firstly introduced into the warm air cavity, the flue gas in the air outlet pipe transfers heat to the inner shell, the inner shell transfers heat to the room temperature air in the warm air cavity, and then the room temperature air absorbing the heat of the flue gas is introduced into the boiler for supporting combustion; the outlet duct of design is convenient for fix inlayer shell and outer shell through the bracing piece, is convenient for form the warm air cavity through inlayer shell and outer shell, and then gives the room temperature air that lets in the boiler with the heat transfer of flue gas, improves the heat recovery efficiency of boiler exhaust gas waste heat.
Optionally, the adjusting mechanism comprises a bidirectional screw and two groups of connecting components;
the two connecting components are respectively connected with connecting sections positioned on two opposite sides of the air outlet pipe;
the bidirectional screw is used for driving the two connecting assemblies to be close to or far away from each other, the axial direction of the bidirectional screw is parallel to the length direction of the heat exchange section, and the bidirectional screw is rotationally connected with the air outlet pipe.
By adopting the technical scheme, force is applied to the bidirectional screw, the bidirectional screw drives the two groups of connecting assemblies to be close to or far away from each other, the two groups of connecting assemblies drive the connecting sections connected with each other to move, and the connecting sections drive the heat exchange sections to move, so that the length of the heat exchange sections inserted into the air outlet pipe is adjusted; the adjustment mechanism of design is convenient for drive two sets of coupling assembling and is close to each other or keep away from each other through two-way screw rod, is convenient for drive the motion of heat exchange section through the coupling assembling, and then adjusts the dwell time of flue gas in the outlet duct to can scrape the flue gas granule of adhesion at heat exchange section surface with the outlet duct cooperation and scrape, improve the heat recovery efficiency of flue gas.
Optionally, the connecting assembly comprises a connecting rod and a plurality of moving rods;
the movable rods are distributed along the length direction of the air outlet pipe, the movable rods are connected with the connecting section, and one end, away from the connecting section, of each movable rod is connected with the connecting rod;
the length direction of connecting rod with the length direction parallel arrangement of outlet duct, two-way screw rod runs through the connecting rod sets up, just two-way screw rod with connecting rod threaded connection.
By adopting the technical scheme, force is applied to the bidirectional screw, the bidirectional screw rotates to drive the connecting rods in the two groups of connecting assemblies to be close to or far away from each other, the connecting rods drive the plurality of connecting moving rods to move, the moving rods drive the connecting sections to move, and the connecting sections drive the heat exchange sections to move, so that the adjustment of the movement path length of the flue gas in the air outlet pipe and the scraping of flue gas particles attached to the surfaces of the heat exchange sections are realized; the connecting component of design is convenient for drive the movable rod motion through the connecting rod, is convenient for drive the linkage segment motion through the movable rod.
Optionally, the device also comprises a water collecting mechanism, wherein the water collecting mechanism comprises a plugging cover, a main pipe and a plurality of branch pipes;
the plurality of branch pipes are distributed along the length direction of the air outlet pipe, and the branch pipes are connected with the air outlet pipe;
the main pipe is connected with one side of the branch pipe away from the air outlet pipe;
the plugging cover is connected with the main pipe water outlet, and is used for plugging the main pipe water outlet.
By adopting the technical scheme, the flue gas moves in the inner cavity of the air outlet pipe from one side close to the smoke outlet of the boiler to one side close to the air outlet end of the air outlet pipe, the temperature of the flue gas is reduced while the flue gas transfers heat to the heat exchange section, water in the flue gas is condensed and flows into the branch pipes, then flows into the main pipe through the branch pipes, and after a certain weight of condensed water is collected, the sealing valve is opened to discharge the condensed water stored in the main pipe for use; the water collecting mechanism of design is convenient for supply the water inflow of flue gas condensation through being in charge of, is convenient for assemble and temporary storage the comdenstion water in the flue gas through the house steward, is convenient for shutoff and release the comdenstion water that assembles in the house steward through the shutoff lid, simultaneously, through water collecting mechanism, the steam in the flue gas of being convenient for retrieve, and then the water economy resource.
Optionally, a plurality of screens are arranged in the branched pipes.
Through adopting above-mentioned technical scheme, the screen cloth of design can be with flue gas granule along being in the main pipe of being in charge of, and then influences the quality of water of comdenstion water.
Optionally, offer a plurality of drain that are used for discharging screen cloth filterable flue gas granule on being in charge of, just can dismantle fixedly connected with on being in charge of and be used for shutoff the closure plate of drain.
By adopting the technical scheme, the blocking plate is opened, the flue gas particles filtered by the screen mesh are taken out through the sewage outlet, and then the sewage outlet is blocked by using the blocking plate; the designed drain is convenient for discharge the flue gas particles filtered by the screen, avoids the blockage of the branch pipe caused by excessive accumulation of the flue gas particles, and is convenient for plugging the drain through the plugging plate.
Optionally, the inside cavity of bracing piece sets up, just the inside cavity of bracing piece with the inner chamber intercommunication of inlayer shell.
Through adopting above-mentioned technical scheme, the bracing piece of cavity setting of design can further improve the heat exchange rate between flue gas and the room temperature air.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the designed boiler smoke exhaust waste heat deep recovery device is convenient for accessing the smoke exhausted by the boiler through the air outlet pipe; the connecting section is convenient for connecting a plurality of heat exchange sections, the heat exchange sections are convenient for absorbing heat in the flue gas, the heat in the flue gas is further transferred to cold water in the water pipe, the adjusting mechanism is convenient for driving the connecting section to move, the length of the heat exchange sections extending into the air outlet pipe is further adjusted, the moving path length of the flue gas in the air outlet pipe is changed, the residence time of the flue gas in the air outlet pipe is changed, meanwhile, flue gas particles attached to the surface of the heat exchange sections can be scraped by being matched with the air outlet pipe, and the recovery efficiency of the waste heat of the discharged flue gas of a boiler is improved;
2. the designed boiler exhaust gas waste heat deep recovery device is convenient for fixing the inner shell and the outer shell through the support rods, and is convenient for forming a warm air cavity through the inner shell and the outer shell, so that the heat of the smoke is transferred to room temperature air in the boiler, and the heat recovery efficiency of the boiler exhaust gas waste heat is improved;
3. the boiler exhaust gas waste heat degree of depth recovery unit of design is convenient for drive two sets of coupling assembling and is close to each other or keep away from each other through two-way screw rod, is convenient for drive the motion of heat exchange section through the coupling assembling, and then adjusts the dwell time of flue gas in the outlet duct to can scrape the flue gas granule of adhesion at heat exchange section surface with the outlet duct cooperation and scrape, improve the heat recovery efficiency of flue gas.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a deep recovery device for waste heat of boiler exhaust gas according to an embodiment of the present application;
fig. 2 is a schematic diagram of the overall structure of a deep recovery device for waste heat of boiler exhaust gas, which is intended to illustrate the structure of a water pipe;
FIG. 3 is a schematic view of the overall structure of a deep recovery device for waste heat of boiler exhaust gas, which is intended to illustrate the structure of an air outlet pipe;
FIG. 4 is a cross-sectional view of FIG. 3;
fig. 5 is a schematic diagram of the overall structure of a deep recovery device for waste heat of boiler exhaust gas, which is intended to illustrate the structure of a water collecting mechanism.
Reference numerals: 1. an air outlet pipe; 11. a sliding hole; 12. an inner shell; 13. an outer shell; 14. a support rod; 15. a warm air cavity; 2. a water pipe; 21. a heat exchange section; 22. a connection section; 3. an adjusting mechanism; 31. a bidirectional screw; 32. a connection assembly; 321. a connecting rod; 322. a moving rod; 4. a water collecting mechanism; 41. a blocking cover; 42. a header pipe; 43. a branch pipe; 431. a sewage outlet; 5. a screen; 6. and a closure plate.
Detailed Description
The application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses a boiler exhaust gas waste heat deep recovery device.
Referring to fig. 1, a boiler exhaust gas waste heat deep recovery device comprises an air outlet pipe 1, two water through pipes 2, an adjusting mechanism 3 for driving the two water through pipes 2 to move and a water collecting mechanism 4 for collecting condensed water in the air outlet pipe 1; the length direction of the air outlet pipe 1 is horizontally arranged, and the air outlet pipe 1 is connected with a smoke outlet bolt of the boiler.
Referring to fig. 2, two water pipes 2 are respectively disposed near opposite sides of the air outlet pipe 1, and two water pipes 2 are disposed near adjacent sides of the bottom wall of the air outlet pipe 1, the water pipes 2 include a plurality of heat exchange sections 21 and a plurality of connection sections 22 for connecting the adjacent two heat exchange sections 21, the heat exchange sections 21 are welded with the connection sections 22, in this embodiment, each water pipe 2 includes four heat exchange sections 21 and five connection sections 22, and the heat exchange sections 21 inserted into the air outlet pipe 1 on the two water pipes 2 are staggered.
Referring to fig. 3, the air outlet pipe 1 is provided with a plurality of sliding holes 11 for passing through the heat exchange sections 21, and the heat exchange sections 21 are slidably connected with the air outlet pipe 1, and each heat exchange section 21 can divide the air outlet pipe 1 into two chambers; in this embodiment, the length direction of the heat exchange section 21 is perpendicular to the length direction of the connection section 22, and the length direction of the connection section 22 is parallel to the length direction of the air outlet pipe 1, and the number of the sliding holes 11 is eight.
Referring to fig. 2 and 3, the outlet duct 1 includes an inner shell 12, an outer shell 13, and a plurality of support rods 14; the outer shell 13 is sleeved outside the inner shell 12, a heating cavity 15 for allowing air introduced into the boiler to pass through is arranged between the inner shell 12 and the outer shell 13, the heating cavity 15 is arranged separately from the inner cavity of the sliding hole 11, and the air outlet end of the heating cavity 15 is connected with an air inlet of the boiler through bolts; four legs for supporting the outer shell 13 are welded to the bottom wall of the outer shell 13.
Referring to fig. 3, the support rod 14 is located in the inner cavity of the warm air cavity 15, the support rod 14 and the heat exchange section 21 are staggered, one end of the support rod 14 is welded with the outer shell 13, one end of the support rod 14 away from the outer shell 13 is welded with the inner shell 12, the inside of the support rod 14 is hollow, and the inner cavity of the support rod 14 is communicated with the inner cavity of the inner shell 12; in this embodiment, the number of the support rods 14 is twenty-one, twenty-one support rods 14 are equally divided into three groups, one group is located between the top wall of the inner shell 12 and the top wall of the outer shell 13, the other two groups are located on two adjacent sides of the first group, and seven support rods 14 in each group are distributed along the length direction of the air outlet pipe 1.
Referring to fig. 1, the adjusting mechanism 3 is connected with the outer shell 13, and the connecting mechanism is connected with the connecting section 22; the adjusting mechanism 3 comprises a bidirectional screw 31 and two groups of connecting components 32, and the two groups of connecting components 32 are respectively connected with the connecting sections 22 positioned on two opposite sides of the air outlet pipe 1; the axial direction of the bidirectional screw rod 31 is perpendicular to the length direction of the air outlet pipe 1, the axial direction of the bidirectional screw rod 31 is horizontal, a supporting frame is welded on the top wall of the outer shell 13, the bidirectional screw rod 31 passes through the supporting frame, the bidirectional screw rod 31 is rotationally connected with the supporting frame through a bearing, the outer ring of the bearing is clamped with the supporting frame, and the inner ring of the bearing is clamped with the bidirectional screw rod 31; in order to facilitate driving the bidirectional screw 31 to rotate, one end of the bidirectional screw 31 is coaxially welded with a driving hand wheel.
Referring to fig. 1, the connection assembly 32 includes a connection rod 321 and a plurality of moving rods 322, the plurality of moving rods 322 are distributed along the length direction of the air outlet pipe 1, one end of each moving rod 322 is welded with the top wall of the connection section 22, the other end is connected with the connection rod 321 by bolts, the length direction of the connection rod 321 is parallel to the length direction of the air outlet pipe 1, the bidirectional screw 31 penetrates through the connection rods 321 in the two groups of connection assemblies 32, and the bidirectional screw 31 is in threaded connection with the connection rods 321; the number of movable rods 322 in each set of connection assemblies 32 in this embodiment is six.
Referring to fig. 1 and 5, the water collecting mechanism 4 includes a plugging cover 41, a main pipe 42 and a plurality of branch pipes 43, the plurality of branch pipes 43 are distributed along the length direction of the air outlet pipe 1, the branch pipes 43 pass through the bottom walls of the outer shell 13 and the inner shell 12, the inner cavities of the branch pipes 43 are communicated with the inner cavities of the inner shell 12, the branch pipes 43 are welded with the inner shell 12, and the branch pipes 43 are welded with the outer shell 13; one end of the branch pipe 43 far away from the outer shell 13 is welded with the main pipe 42, the inner cavity of the branch pipe 43 is communicated with the inner cavity of the main pipe 42, the length direction of the main pipe 42 is parallel to the length direction of the air outlet pipe 1, the plugging cover 41 is used for plugging the water outlet of the main pipe 42, and the plugging cover 41 is in threaded connection with the main pipe 42.
Referring to fig. 5, in order to separate flue gas particles from condensed water, a plurality of screens 5 are arranged in the branched pipes 43, the screens 5 divide the inner cavity of the branched pipes 43 into two sections, and the screens 5 are welded with the inner cavity walls of the branched pipes 43; in order to facilitate the discharge of the flue gas particles filtered by the screen 5, the branch pipe 43 is provided with a plurality of drain outlets 431, and the branch pipe 43 is clamped with a blocking plate 6 for blocking the drain outlets 431; in this embodiment, the number of the branched pipes 43 is five, each branched pipe 43 is obliquely arranged from one side close to the air inlet end of the inner shell 12 to one side close to the air outlet end of the inner shell 12 from high to low, and the blocking plate 6 is arranged close to the outer shell 13; the number of screens 5 in each branch pipe 43 is one, and the number of drain outlets 431 in each branch pipe 43 is one.
The embodiment of the application relates to a deep recovery device for waste heat of boiler smoke exhaust, which is implemented by the following principle: connecting the air inlet end of the inner shell 12 with the smoke outlet of the boiler, so that the smoke exhausted by the boiler moves from one side close to the smoke outlet of the boiler to one side close to the air outlet end of the inner shell 12 in the inner cavity of the inner shell 12, and finally is exhausted to the external environment from the air outlet pipe 1 of the inner shell 12;
in the process that the flue gas flows in the inner shell 12, cold water is introduced into the connecting section 22 from a water inlet near the air outlet end of the inner shell 12, when the cold water flows through the heat exchange section 21, the flue gas in the inner cavity of the inner shell 12 transfers heat to the heat exchange section 21, the heat exchange section 21 transfers heat to the cold water flowing in the heat exchange section 21, and the cold water is discharged from the air inlet end near the inner shell 12 after being heated;
meanwhile, fresh air is required to be introduced into the boiler for combustion, room temperature air is introduced into the heating cavity 15, the flue gas transfers heat to the inner shell 12 and the support columns 14, the inner shell 12 and the support columns 14 transfer heat to the room temperature air in the heating cavity 15, and the room temperature air is introduced into the boiler from the air inlet of the boiler for combustion supporting after being heated;
the gas outlet end of the inner shell 12 is detected by temperature detection equipment, the gas outlet end of the inner shell 12 is forced to a driving hand wheel according to the detected gas outlet temperature, the driving hand wheel drives a bidirectional screw rod 31 to rotate, the bidirectional screw rod 31 rotates to drive two connecting rods 321 to be close to or far away from each other, the connecting rods 321 drive four connecting rods 322 connected respectively to be close to or far away from each other, the moving rods 322 drive a connecting section 22 to move, the connecting section 22 drives a heat exchange section 21 to move, the length of the heat exchange section 21 extending into the inner cavity of the gas outlet pipe 1 is prolonged or shortened, the length of a movement path of gas in the gas outlet pipe 1 is regulated, the stay time of the gas in the gas outlet pipe 1 is prolonged or shortened finally, the gas outlet temperature discharged to the external environment is controlled, and the heat recovery efficiency of the boiler smoke exhaust waste heat recovery device is improved;
meanwhile, in the process that the connecting section 22 drives the heat exchange section 21 to slide along the hole wall of the sliding hole 11, the surface of the heat exchange section 21 and the inner shell 12 are scratched, smoke particles attached to heat exchange are scraped into the inner shell 12, part of the smoke particles fall into the branch pipe 43 and are filtered by the screen 5, and the rest of the smoke particles are finally carried by smoke and discharged to the outside from the air outlet end of the inner shell 12;
in the process of releasing heat from the flue gas, water vapor in the flue gas flows into the branch pipes 43 after being condensed, finally is collected into the main pipe 42 from the branch pipes 43, and condensed water collected in the main pipe 42 can be taken out by opening the plugging cover 41; and opening the blocking plate 6, and taking out the flue gas particles filtered by the screen 5 through the drain outlet 431.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (5)
1. The boiler smoke exhaust waste heat deep recovery device is characterized by comprising an air outlet pipe (1), two water pipes (2) and an adjusting mechanism (3) for driving the two water pipes (2) to move;
the air outlet pipe (1) is connected with a smoke outlet of the boiler;
the two water through pipes (2) are respectively arranged close to the two opposite sides of the air outlet pipe (1); the water pipe (2) comprises a plurality of heat exchange sections (21) and a plurality of connecting sections (22) for connecting two adjacent heat exchange sections (21);
the heat exchange section (21) is connected with the connecting section (22);
the air outlet pipe (1) is provided with a plurality of sliding holes (11) for the heat exchange section (21) to pass through, the heat exchange section (21) is in sliding connection with the air outlet pipe (1), and the heat exchange section (21) can divide the air outlet pipe (1) into two chambers;
the adjusting mechanism (3) is connected with the air outlet pipe (1), and the adjusting mechanism (3) is connected with the connecting section (22);
the air outlet pipe (1) comprises an inner shell (12), an outer shell (13) and a plurality of support rods (14);
a heating cavity (15) is arranged between the inner shell (12) and the outer shell (13), the heating cavity (15) is separated from the inner cavity of the sliding hole (11), and the air outlet end of the heating cavity (15) is connected with the air inlet of the boiler;
the supporting rod (14) is positioned in the heating cavity (15), one end of the supporting rod (14) is connected with the inner shell (12), and the other end of the supporting rod is connected with the outer shell (13);
the water collecting device also comprises a water collecting mechanism (4), wherein the water collecting mechanism (4) comprises a plugging cover (41), a main pipe (42) and a plurality of branch pipes (43);
the plurality of branch pipes (43) are distributed along the length direction of the air outlet pipe (1), and the branch pipes (43) are connected with the air outlet pipe (1);
the main pipe (42) is connected with one side of the branch pipe (43) away from the air outlet pipe (1);
the plugging cover (41) is connected with the water outlet of the main pipe (42), and the plugging cover (41) is used for plugging the water outlet of the main pipe (42);
a plurality of screens (5) are arranged in the branch pipes (43);
in the process that the connecting section (22) drives the heat exchange section (21) to slide along the hole wall of the sliding hole (11), the surface of the heat exchange section (21) and the inner shell (12) are scratched, smoke particles attached to heat exchange are scraped into the inner shell (12), part of smoke particles fall into the branched pipe (43) and are filtered by the screen (5), and the rest of smoke particles are finally carried by smoke and discharged to the outside from the air outlet end of the inner shell (12).
2. The boiler exhaust gas waste heat deep recovery device according to claim 1, wherein the adjusting mechanism (3) comprises a bidirectional screw (31) and two groups of connecting components (32);
the two connecting assemblies (32) are respectively connected with the connecting sections (22) positioned on two opposite sides of the air outlet pipe (1);
the bidirectional screw rod (31) is used for driving the two connecting assemblies (32) to be close to or far away from each other, the axial direction of the bidirectional screw rod (31) is parallel to the length direction of the heat exchange section (21), and the bidirectional screw rod (31) is rotationally connected with the air outlet pipe (1).
3. The boiler exhaust gas waste heat deep recovery apparatus according to claim 2, wherein the connection assembly (32) comprises a connection rod (321) and a plurality of moving rods (322);
the movable rods (322) are distributed along the length direction of the air outlet pipe (1), the movable rods (322) are connected with the connecting section (22), and one end, far away from the connecting section (22), of each movable rod (322) is connected with the connecting rod (321);
the length direction of the connecting rod (321) is parallel to the length direction of the air outlet pipe (1), the bidirectional screw rod (31) penetrates through the connecting rod (321), and the bidirectional screw rod (31) is in threaded connection with the connecting rod (321).
4. The boiler exhaust gas waste heat deep recovery device according to claim 1, wherein a plurality of drain outlets (431) for discharging the smoke particles filtered by the screen (5) are formed in the branch pipe (43), and a blocking plate (6) for blocking the drain outlets (431) is detachably and fixedly connected to the branch pipe (43).
5. The boiler exhaust gas waste heat deep recovery device according to claim 1, wherein the support rod (14) is arranged in a hollow manner, and the inner cavity of the support rod (14) is communicated with the inner cavity of the inner shell (12).
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| CN114704961B (en) * | 2022-03-28 | 2023-11-14 | 四川点石能源股份有限公司 | Tail hot water heat exchange device of waste heat boiler |
| CN115200014B (en) * | 2022-07-01 | 2023-06-02 | 北京兴达奇热工控制设备有限公司 | Blast furnace gas radiant tube combustion system of two preheats of sky gas |
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| CN101097076A (en) * | 2006-06-28 | 2008-01-02 | 宫树同 | Composite heat supply stove used for long and narrow space |
| CN101775483A (en) * | 2010-02-10 | 2010-07-14 | 河北钢铁股份有限公司唐山分公司 | Heat accumulative roller bottom heating furnace |
| RU2743867C1 (en) * | 2020-05-28 | 2021-03-01 | Вадим Сергеевич Рыжов | Continuous burning solid boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160238245A1 (en) * | 2015-02-18 | 2016-08-18 | Mitsubishi Hitachi Power Systems, Ltd. | Flue gas heat recovery system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097076A (en) * | 2006-06-28 | 2008-01-02 | 宫树同 | Composite heat supply stove used for long and narrow space |
| CN101775483A (en) * | 2010-02-10 | 2010-07-14 | 河北钢铁股份有限公司唐山分公司 | Heat accumulative roller bottom heating furnace |
| RU2743867C1 (en) * | 2020-05-28 | 2021-03-01 | Вадим Сергеевич Рыжов | Continuous burning solid boiler |
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