CN110274256B - Heat accumulating type air preheater without wind channeling - Google Patents
Heat accumulating type air preheater without wind channeling Download PDFInfo
- Publication number
- CN110274256B CN110274256B CN201910510197.6A CN201910510197A CN110274256B CN 110274256 B CN110274256 B CN 110274256B CN 201910510197 A CN201910510197 A CN 201910510197A CN 110274256 B CN110274256 B CN 110274256B
- Authority
- CN
- China
- Prior art keywords
- temperature side
- collecting pipe
- flue gas
- way valve
- valve
- 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.)
- Active
Links
- 230000005465 channeling Effects 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000003546 flue gas Substances 0.000 claims abstract description 93
- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000001172 regenerating effect Effects 0.000 claims abstract description 15
- 238000009825 accumulation Methods 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 abstract description 5
- 238000005338 heat storage Methods 0.000 description 35
- 239000000779 smoke Substances 0.000 description 27
- 238000010438 heat treatment Methods 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 12
- 239000002918 waste heat Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 238000010926 purge Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a heat accumulating type air preheater without air channeling, which comprises a steel structure frame, wherein a high-temperature flue gas collecting pipe is arranged at the top of the steel structure frame, a hot flue gas inlet is arranged at the top of the high-temperature flue gas collecting pipe, a plurality of hot flue gas outlets are arranged at the bottom of the high-temperature flue gas collecting pipe, each hot flue gas outlet is connected with a heat accumulating unit, each heat accumulating unit comprises a high-temperature side four-way valve and a low-temperature side four-way valve, the high-temperature side four-way valve is connected with the corresponding hot flue gas outlet, the high-temperature side four-way valve is connected with a hot air collecting pipe, the low-temperature side four-way valve is connected with a cold flue gas collecting pipe, and the low-temperature side four-way valve is connected with the cold air collecting pipe; the high-temperature side four-way valve is connected with the low-temperature side four-way valve through a pipeline, a regenerative chamber is arranged on the pipeline, the high-temperature side four-way valve is connected with the low-temperature side four-way valve through a transmission mechanism, and the low-temperature side four-way valve is connected with a driving motor. The switching actions of the high-temperature side four-way valve and the low-temperature side four-way valve can be synchronized, and the problem of air channeling caused by inconsistent valve core positions is avoided.
Description
Technical Field
The invention relates to the technical field of air preheaters, in particular to a regenerative air preheater without wind channeling.
Background
In recent years, the rotary regenerative air preheater developed in the petrochemical heating furnace application has higher efficiency and stable equipment operation, but has larger investment, larger equipment rotary body shape and difficult equipment body transportation. The reversing heat accumulating type air preheater applied in other industries generally occupies a large area due to the need of the paired heat accumulating boxes and the corresponding heat accumulating type combustion systems, and has large hearth pressure fluctuation during reversing of the four-way valve, and the risk of flameout and tempering of the operation of the burner is large, so that the safety operation is influenced.
The phase difference heat accumulating type air preheater with the four-way valve controlling the flow direction of the smoke and the air or the eight-way valve controlling the flow direction of the smoke and the air to the U-shaped pipe heat accumulating type air preheater is adopted, the valve reversing valve plate is adopted to blow by and leak air, the pressure fluctuation of the system is large, the combustion system of the heating furnace is unstable, the combustion efficiency is lower, the concentration of combustible substances such as CO in the smoke is increased, and hidden danger is brought to the safe operation of the heating furnace; in addition, the pressure drop loss caused by air leakage is large, so that the power consumption of a fan and a blower is required to be increased in order to maintain the pressure balance of the heating furnace and the smoke duct system, and the heat efficiency of the heating furnace system is reduced.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides the heat accumulating type air preheater without air channeling, which can synchronize the switching actions of the high-temperature side four-way valve and the low-temperature side four-way valve and avoid the air channeling problem caused by inconsistent valve core positions.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the heat accumulating type air preheater without the channeling air comprises a steel structure frame, wherein a high-temperature flue gas collecting pipe is arranged at the top of the steel structure frame, a hot flue gas inlet is arranged at the top of the high-temperature flue gas collecting pipe, a plurality of hot flue gas outlets are arranged at the bottom of the high-temperature flue gas collecting pipe, each hot flue gas outlet is connected with a heat accumulating unit, each heat accumulating unit comprises a high-temperature side four-way valve and a low-temperature side four-way valve, a first valve port of the high-temperature side four-way valve is connected with the corresponding hot flue gas outlet, a fourth valve port of the high-temperature side four-way valve is connected with a hot air collecting pipe, a hot air outlet is arranged on the hot air collecting pipe, a first valve port of the low-temperature side four-way valve is connected with a cold flue gas collecting pipe, a cold air outlet corresponding to the cold air collecting pipe is arranged at the bottom of the steel structure frame, and a cold air inlet is arranged on the cold air collecting pipe; in each heat storage unit, the second valve port of the high-temperature side four-way valve is connected with the second valve port of the low-temperature side four-way valve through a first pipeline, the third valve port of the high-temperature side four-way valve is connected with the third valve port of the low-temperature side four-way valve through a second pipeline, heat storage chambers are arranged on the first pipeline and the second pipeline, a central shaft of the high-temperature side four-way valve is connected with a central shaft of the low-temperature side four-way valve through a transmission mechanism, and the central shaft of the low-temperature side four-way valve is also connected with a driving motor.
Further, the first pipeline and the second pipeline both comprise a high-temperature side 90-degree bent flue and a low-temperature side 90-degree bent flue, the second valve port and the third valve port of the high-temperature side four-way valve are respectively connected with the heat storage chamber through the high-temperature side 90-degree bent flue, and the second valve port and the third valve port of the low-temperature side four-way valve are respectively connected with the heat storage chamber through the low-temperature side 90-degree bent flue.
Further, a purging pipe and a manhole door are arranged on the upper portion of the regenerator, and an overhaul platform corresponding to the manhole door is arranged on the steel structure frame.
Further, a heat accumulator is arranged in the heat accumulation chamber, and the heat accumulator is made of honeycomb ceramic bricks.
Further, the driving motor is an explosion-proof motor.
Further, a drain pipe is arranged on the low-temperature side 90-degree bent flue.
Further, the transmission mechanism is a chain transmission mechanism, the chain transmission mechanism comprises transmission chain wheels respectively arranged on the central shafts of the high-temperature side four-way valve and the low-temperature side four-way valve, and the two transmission chain wheels are connected through a transmission chain.
Further, a driving sprocket is further arranged on the central shaft of the low-temperature side four-way valve, the driving sprocket is connected with a speed reducer through a driving chain, and the speed reducer is connected with the driving motor.
Furthermore, the hot air collecting pipe and the cold flue gas collecting pipe are vertically penetrated by a chain penetrating pipe, and the chain penetrating pipe is sleeved outside the transmission chain.
Further, the high temperature side four-way valve and the low temperature side four-way valve both comprise double-layer valve plates.
The invention has the beneficial effects that: the waste heat of the recovered flue gas can be utilized to preheat the combustion air, so that the fuel is saved, the heat dissipation loss of the flue gas is reduced, and the heat efficiency of a heating furnace system is improved; the switching actions of the high-temperature side four-way valve and the low-temperature side four-way valve can be synchronized, and the non-channeling four-way valve is adopted in a matching way, so that the problem of channeling and air leakage in the flow direction switching process of the flue gas and the air of the heat accumulating type air preheater is solved, the pressure fluctuation in the flue gas duct is reduced to an extremely low level, the temperature change amplitude in the flue gas duct is small, the change is gentle, the pressure drop loss of the preheater is small, the safe and stable operation of a heating furnace combustion system can be ensured, the combustion efficiency and the heating furnace system heat efficiency are improved, the fuel is saved, and the emission is reduced; each heat storage unit has a cut-off function, has a large load regulation ratio and can adapt to various different working conditions; the honeycomb ceramic tile is adopted as a heat accumulator, is load-resistant and high-temperature-resistant, has high heat exchange efficiency, and can reduce the smoke to be discharged below the low-temperature dew point corrosion temperature; the occupied area is less, the equipment integration degree is higher, the cost is lower, and the operation is simple.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a blowby-free regenerative air preheater according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of the regenerative air preheater without blowby shown in FIG. 1;
fig. 3 is a schematic diagram of a blowby-free regenerative air preheater according to an embodiment of the present invention.
In the figure:
1. A high temperature flue gas collecting pipe; 2. a steel structural frame; 3. a high temperature side four-way valve; 4. a chain transmission mechanism; 5. a high-temperature side 90-degree bent flue; 6. a purge tube; 7. a regenerator; 8. a heat storage body; 9. a hot air collecting pipe; 10. the chain passes through the pipe; 11. a cold flue gas collecting pipe; 12. a low-temperature side 90-degree bent flue; 13. a blow-down pipe; 14. a low temperature side four-way valve; 15. a drive chain; 16. a driving motor; 17. a cold air collecting pipe; 18. a manhole door; 19. a maintenance platform; a. a hot flue gas inlet; b. a hot air outlet; c. a cold flue gas outlet; d. a cold air inlet; i, a normal heat exchange position I; II, a four-way valve switching process; III, a normal heat exchange position II; IV, stopping position.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1-3, the regenerative air preheater without channeling air according to the embodiment of the present invention includes a steel structure frame 2, a high temperature flue gas collecting pipe 1 is disposed at the top of the steel structure frame 2, a hot flue gas inlet a is disposed at the top of the high temperature flue gas collecting pipe 1, a plurality of hot flue gas outlets are disposed at the bottom of the high temperature flue gas collecting pipe 1, each hot flue gas outlet is connected with a heat accumulating unit, the heat accumulating unit includes a high temperature side four-way valve 3 and a low temperature side four-way valve 14, a first valve port of the high temperature side four-way valve 3 is connected with the corresponding hot flue gas outlet, a fourth valve port of the high temperature side four-way valve 3 is connected with a hot air collecting pipe 9, a hot air outlet b is disposed on the hot air collecting pipe 9, a first valve port of the low temperature side four-way valve 14 is connected with a cold flue gas collecting pipe 11, a cold flue gas outlet c is disposed on the cold flue gas collecting pipe 11, a fourth valve port of the low temperature side valve 14 is connected with a corresponding air outlet on the collecting pipe 17, and a cold air outlet 17 is disposed on the steel structure frame 2, and a cold air collecting pipe is disposed at the bottom of the cold air collecting pipe 17; in each heat storage unit, the second valve port of the high temperature side four-way valve 3 is connected with the second valve port of the low temperature side four-way valve 14 through a first pipeline, the third valve port of the high temperature side four-way valve 3 is connected with the third valve port of the low temperature side four-way valve 14 through a second pipeline, heat storage chambers 7 are arranged on the first pipeline and the second pipeline, the central shaft of the high temperature side four-way valve 3 is connected with the central shaft of the low temperature side four-way valve 14 through a transmission mechanism, and the central shaft of the low temperature side four-way valve 14 is also connected with a driving motor 16.
In a specific embodiment of the present invention, the first pipeline and the second pipeline each include a high-temperature side 90 ° bent flue 5 and a low-temperature side 90 ° bent flue 12, the second valve port and the third valve port of the high-temperature side four-way valve 3 are respectively connected to the regenerator 7 through the high-temperature side 90 ° bent flue 5, and the second valve port and the third valve port of the low-temperature side four-way valve 14 are respectively connected to the regenerator 7 through the low-temperature side 90 ° bent flue 12.
In one embodiment of the present invention, the upper part of the regenerator 7 is provided with a purge pipe 6 and a manhole door 18, and the steel frame 2 is provided with an inspection platform 19 corresponding to the manhole door 18.
In one embodiment of the present invention, a heat accumulator 8 is disposed in the heat accumulator 7, and the heat accumulator 8 is a honeycomb ceramic tile.
In one embodiment of the present invention, the drive motor 16 is an explosion-proof motor.
In one embodiment of the present invention, the low temperature side 90 ° bend 12 is provided with a drain 13.
In one embodiment of the present invention, the transmission mechanism is a chain transmission mechanism 4, and the chain transmission mechanism 4 includes transmission sprockets respectively disposed on the central shafts of the high temperature side four-way valve 3 and the low temperature side four-way valve 14, and the two transmission sprockets are connected by a transmission chain.
In a specific embodiment of the present invention, a driving sprocket is further disposed on the central shaft of the low temperature side four-way valve 14, and the driving sprocket is connected to a speed reducer through a driving chain 15, and the speed reducer is connected to the driving motor 16.
In one embodiment of the present invention, the hot air collecting pipe 9 and the cold flue gas collecting pipe 11 are vertically penetrated by a chain penetrating pipe 10, and the chain penetrating pipe 10 is sleeved outside the transmission chain.
In one embodiment of the present invention, the high temperature side four-way valve 3 and the low temperature side four-way valve 14 each comprise a double-layer valve plate.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
The invention relates to a heat accumulating type air preheater without air channeling, which mainly comprises a high-temperature flue gas collecting pipe 1, a steel structure frame 2, a high-temperature side four-way valve 3, a chain transmission mechanism 4, a high-temperature side 90-degree bent flue 5, a purging pipe 6, a heat accumulating chamber 7, a heat accumulator 8, a hot air collecting pipe 9, a chain crossing pipe 10, a cold flue gas collecting pipe 11, a low-temperature side 90-degree bent flue 12, a blow-off pipe 13, a low-temperature side four-way valve 14, a driving chain 15, a driving motor 16, a cold air collecting pipe 17, a manhole door 18, an overhaul platform 19 and the like.
The high-temperature flue gas collecting pipe 1 is supported at the top of the steel structure frame 2 and is connected with a first valve port at the top of the high-temperature side four-way valve 3 through a flange bolt; the left and right valve ports (namely the second valve port and the third valve port) of the high-temperature side four-way valve 3 are respectively communicated with the top of one regenerator 7 through flange bolts and a high-temperature side 90-degree bent flue 5, the fourth valve port at the bottom of the high-temperature side four-way valve 3 is connected with a corresponding interface on a hot air collecting pipe 9 through flange bolts, a hot flue gas inlet a is arranged at the top of the high-temperature flue gas collecting pipe 1, and a hot air outlet b is arranged on the hot air collecting pipe 9.
The cold air collecting pipe 17 is supported at the bottom of the steel structure frame 2 and is connected with a fourth valve port at the bottom of the low-temperature side four-way valve 14 through a flange bolt; the left and right valve ports (namely the second valve port and the third valve port) of the low-temperature side four-way valve 14 are respectively communicated with the bottom of one regenerator 7 through flange bolts and a low-temperature side 90-degree bent flue 12, the first valve port at the top of the low-temperature side four-way valve 14 is connected with a corresponding interface on the cold smoke collecting pipe 11 through flange bolts, the cold smoke collecting pipe 11 is provided with a cold smoke outlet c, and the cold air collecting pipe 17 is provided with a cold air inlet d.
The purge pipe 6 and the manhole door 18 are welded on the outer side of the upper part of the regenerator 7 and integrated with the regenerator 7. Each regenerator 7 is provided with a purge tube 6 to which steam or water can be externally supplied to purge or flush the regenerator 8 when required. Each regenerator 7 is provided with a manhole door 18, so that when the regenerator is convenient to install or overhaul, the regenerator 8 and an overhaul worker enter and exit, an overhaul platform 19 is arranged below the manhole door 18 on the steel structure frame 2, and the worker can stand on the overhaul platform 19 during overhaul.
The chain transmission mechanism 4 consists of a transmission chain wheel and a transmission chain, wherein each high-temperature side four-way valve 3 is provided with a transmission chain wheel, and each low-temperature side four-way valve 14 is provided with a transmission chain wheel and a driving chain wheel. The high-temperature side four-way valve 3 and the transmission sprocket on the central shaft of the low-temperature side four-way valve 14 in each heat storage unit are connected through a transmission chain, so that the positions of valve cores of the high-temperature side four-way valve 3 and the low-temperature side four-way valve 14 in each heat storage unit are always consistent, and when the driving motor 16 drives the low-temperature side four-way valve 14 to change direction, the high-temperature side four-way valve 3 keeps synchronous change direction, and no blow-by of smoke and air channels is ensured. When the transmission chain of the chain transmission mechanism 4 is installed, the transmission chain needs to pass through the chain passing pipes 10 arranged on the hot air collecting pipe 9 and the cold smoke collecting pipe 11, so that the transmission chain can pass through the hot air collecting pipe 9 and the cold smoke collecting pipe 11 to make the equipment compact, and each heat storage unit is correspondingly provided with two chain passing pipes 10.
The driving motor 16 is arranged near the low-temperature side four-way valve 14, the driving motor 16 is connected with a speed reducer, and the speed reducer is connected with a driving chain wheel on the central shaft of the low-temperature side four-way valve 14 through a driving chain 15; the drive motor 16 is fixed to the steel structure frame 2 by a mount. When the device works, the driving motor 16 drives the driving chain wheel on the central shaft of the low-temperature side four-way valve 14 through the driving chain 15, so that the valve cores in each heat storage unit rotate together, and the four-way valve can switch the flow directions of smoke and air.
The high-temperature flue gas collecting pipe 1 is a hollow pipeline formed by welding steel plates, can be used for high-temperature flue gas circulation and diversion, is provided with a square hot flue gas inlet a for heat supply flue gas to enter at the top, is provided with hot flue gas outlets with the same quantity as the heat storage units at the bottom, and is connected with a first valve port at the top of the high-temperature side four-way valve 3 by using a flange. According to the change of the internal flue gas flow, the middle of the high-temperature flue gas collecting pipe 1 is slightly larger, two ends are gradually closed, and the ends are closed. For heat preservation and insulation, anchoring parts are welded on the inner wall of the high-temperature flue gas collecting pipe 1, and lining casting materials with certain thickness are laid.
The regenerator 7, the hot air collecting pipe 9 and the cold flue gas collecting pipe 11 are all hollow box-shaped structures which are welded and divided by steel plates, are prefabricated into a whole, and are welded and fixed on the steel structure frame 2 so as to support the weight on the ground foundation; the regenerators 7 are vertically arranged from top to bottom, each regenerator unit comprises 2 regenerators 7, the left side and the right side of each regenerator 7 are respectively arranged, the regenerators 7 are sequentially arranged in parallel, and a hot air collecting pipe 9 and a cold smoke collecting pipe 11 are arranged between the left regenerator 7 and the right regenerator 7. The heat accumulator 8 is loaded in the heat accumulator 7, and a layer of steel grating is welded on the inner wall plate of each heat accumulator 7 and used for supporting the heat accumulator 8. The outlet at the top of the regenerator 7 is connected with a high-temperature side 90-degree bent flue 5 by using a flange; the outlet of the bottom is flanged to the low temperature side 90 ° bend 12. For heat preservation and insulation, anchoring parts are welded on the inner walls of the regenerators 7 near the outer side, the top and the bottom, and lining casting materials with certain thickness are laid.
The hot air collecting pipe 9 and the cold flue gas collecting pipe 11 are horizontal conical square boxes, the two are stacked up and down, a plurality of regenerators 7 symmetrically arranged on the outer side are clamped in the middle, the equipment structure is compact, the lining between partitions is saved, and the weight of the equipment is reduced; the top of the hot air collecting pipe 9 is provided with hot air inlets with the same quantity as the heat accumulating units, the smaller side of the end part is closed, and the larger side is provided with a hot air outlet b; the hot air after heat exchange is respectively led into the hot air inlets at the top of the hot air collecting pipe 9 through the high temperature side four-way valve 3, and then led out from the hot air outlet b. The bottom of the cold smoke collecting pipe 11 is provided with cold smoke inlets the same as the heat accumulating units in number, one smaller side of the end part is closed, and the larger side is a cold smoke outlet c; the cold flue gas after heat exchange is respectively led into the cold flue gas inlets at the top of the cold flue gas collecting pipe 11 through the low-temperature side four-way valve 14, and then led out from the cold flue gas outlet c. For heat preservation and insulation, anchoring parts are welded on the inner walls of the hot air collecting pipe 9 and the cold flue gas collecting pipe 11 near the top, the bottom and the end parts, and lining casting materials with certain thickness are laid.
The cold air collecting pipe 17 is a hollow pipe formed by welding steel plates and used for cold air circulation and flow division, the top of the cold air collecting pipe is provided with cold air outlets the same as the heat accumulating units in number, one end of the cold air collecting pipe is closed, and the other end of the cold air collecting pipe is a cold air inlet d. Cold air enters the cold air collecting pipe 17 from the cold air inlet d, is split into each cold air outlet, and is guided into the corresponding regenerator 7 through the low-temperature side four-way valve 14.
The heat accumulator 8 is made of honeycomb ceramic bricks and is piled on steel grating plates in the heat accumulator 7, and the direction of a through hole is vertical and parallel to the flowing direction of the flue gas and the air. The heat accumulator has the characteristics of corrosion resistance, high temperature resistance and good thermal shock resistance, can adapt to the heat exchange working condition with larger temperature difference, can exchange the flue gas to lower temperature for discharge, and has high heat exchange efficiency and more recovered heat.
The high temperature side 90 degree bent flue 5 and the low temperature side 90 degree bent flue 12 are both square 90 degree pipelines with steel plates, anchoring parts are welded on the inner wall, casting material liners with certain thickness are laid, and the middle is a flow passage of flue gas and air. The two ports of the high temperature side 90 DEG bent flue 5 and the low temperature side 90 DEG bent flue 12 are respectively connected with the inlets and outlets of the corresponding four-way valve and the regenerator 7 by flange bolts. Wherein, the bottom of the low temperature side 90-degree bent flue 12 is also provided with a drain valve 13, and the flue gas condensate water and the washed sewage can be discharged through the drain pipe 13.
The invention relates to a wind channeling-free heat accumulating type air preheater which is provided with 2 or more than 2 heat accumulating units, wherein each heat accumulating unit comprises 2 heat accumulating chambers 7, and when one heat accumulating chamber releases heat to the air, the other heat accumulating chamber absorbs the waste heat of flue gas; each heat storage unit comprises two four-way valves (namely a high-temperature side four-way valve 3 and a low-temperature side four-way valve 14) and is used for switching the flow directions of smoke and air, so that the smoke and the air sequentially circulate through each heat storage chamber 7, and in order to synchronize the switching actions of the four-way valves in each heat storage unit, the valve cores of the 2 four-way valves are linked by adopting a chain transmission mechanism 4 and are driven by 1 set of driving motor 16, so that the problem of wind channeling caused by inconsistent valve core positions is avoided. The heat storage units with the number of 2 or more are arranged in parallel, and the hot air collecting pipe 9 and the cold flue gas collecting pipe 11 are integrated in the interior of the non-channeling heat storage type air preheater, so that the occupied area of equipment can be reduced, lining materials can be saved, and the weight of the equipment can be reduced. The hot air collecting pipe 9 is arranged at the upper part of the heat storage unit, and the cold flue gas collecting pipe 11 is arranged at the lower part of the heat storage unit, so that the equipment space can be saved, and the structure is more compact.
The cold air collecting pipe 17 and the cold flue gas collecting pipe 11 are arranged at the lower part of the equipment, the driving motor 16 is arranged at the position of the low-temperature side four-way valve 14, so that the equipment is convenient to overhaul and the service life is prolonged, the driving motor 16 is an explosion-proof motor and can not be influenced by the temperature of the low-temperature side four-way valve 14, and the service life is long.
The four-way valve is controlled by the heat storage units with the number of 2 or more to realize reversing, heat storage and heat release functions and the valve reversing frequency. The high-temperature side four-way valve 3 and the low-temperature side four-way valve 14 are both non-channeling type four-way valves, the non-channeling type four-way valves are provided with double-layer valve plates, when the four-way valves are driven, the rotating speed of the valve core is low, firstly, the fluctuation amplitude of the pressure in the smoke duct during reversing is reduced, and the fluctuation frequency is also reduced; secondly, the rotation speed of the valve core is reduced, so that the sealing effect of the sealing brush is facilitated, and the service life of the sealing brush is prolonged.
The heat accumulating units, the high-temperature flue gas collecting pipe 1, the hot air collecting pipe 9, the cold flue gas collecting pipe 11, the cold air collecting pipe 17, the driving motor 16 and the like of the non-channeling heat accumulating type air preheater are all arranged in the steel structure frame 2 and supported on the ground through the steel structure frame 2. Each wind-channeling-free heat accumulating type air preheater is provided with 2 or more than 2 heat accumulating units according to different loads, and each heat accumulating unit comprises 2 heat accumulating chambers 7, 2 wind-channeling-free four-way valves, 4 connecting 90-degree bent smoke pipes, 1 set of explosion-proof motor, a speed reducer and a matched chain transmission mechanism 4.
The high-temperature flue gas collecting pipe 1, the hot air collecting pipe 9, the cold flue gas collecting pipe 11 and the cold air collecting pipe 17 are respectively connected with pipelines corresponding to the waste heat recovery system of the heating furnace.
The air-channeling-free four-way valve has the characteristics of double-layer valve plates, no air channeling and low air leakage rate. The valve plate valve core has 8 typical working positions, wherein 0 degree (360 degrees), 90 degrees and 180 degrees and 270 degrees are cut-off positions; 45 °, 135 °, 225 °, 315 ° are full-load positions. Therefore, the position of the valve plate is reasonably controlled, a certain heat storage and exchange unit of the preheater can obtain various states such as stop heat exchange, small-load throttling heat exchange, rated-load heat exchange and the like, and the load adjustable range of the preheater is large. The position of the valve core can be controlled by combining a travel switch and a control program.
The reversing small periods of the heat storage units are staggered for a certain time, and the rotating speed of the valve core of the four-way valve is regulated, so that the reversing process is gentle, the pressure fluctuation in the flue is extremely small, the temperature fluctuation is small, the pressure drop of the preheater is stable, the safe and stable operation of the heating furnace system is realized, and the normal operation of the combustion system is ensured.
The slower the valve core rotation speed of the four-way valve is, the smaller the pressure fluctuation is; when the four-way valves are switched, the smaller the start-stop time difference is, the higher the overlap ratio is, and the smaller the pressure fluctuation is. When the valve core positions of the four-way valves are kept at a certain angle, the valve core continuously rotates at a low speed all the time, and the system pressure fluctuation is minimum theoretically and can be almost ignored.
In order to ensure that the pressure fluctuation of the flue gas duct is small, the temperature variation range is small, the pressure drop loss of the preheater is kept basically constant, each non-channeling heat accumulating type air preheater is provided with 2 or more heat accumulating units, and the small periods of each heat accumulating unit are integrally and jointly arranged, namely, the four-way valve switching time interval of each heat accumulating unit is controlled, the rotation reversing time of the valve core of the four-way valve is reasonably regulated, the pressure, the temperature, the pressure drop and the like of flue gas and air in the flue gas duct can be kept basically constant, and the safe and stable operation of a heating furnace combustion system is facilitated.
When the wind-channeling-free heat accumulating type air preheater works, the valve cores of the 2 four-way valves of the single heat accumulating unit keep low-speed synchronous rotation to slowly switch the flow channels of air and smoke, and the valve cores of the four-way valves of the plurality of heat accumulating units are staggered by a certain angle to ensure continuous heat exchange of the wind-channeling-free heat accumulating type air preheater, and the pressure fluctuation in a smoke duct is extremely small or no fluctuation, the temperature fluctuation is small, and the pressure drop of the wind-channeling-free heat accumulating type air preheater is stable.
When the scurrieless regenerative air preheater is applied to a petrochemical heating furnace waste heat recovery system, hot flue gas from a hot flue of the waste heat recovery system enters a high-temperature flue gas collecting pipe 1 and is shunted to a high-temperature side four-way valve 3 of each heat storage unit, the high-temperature side four-way valve 3 is used for guiding the hot flue gas into a corresponding heat storage chamber 7, and the hot flue gas passes through a heat storage body 8 from top to bottom in the heat storage chamber 7 to heat the heat storage body 8; the cold flue gas after heat exchange is led into the cold flue gas collecting pipe 11 through the corresponding low-temperature side four-way valve 14, and then is led into a cold flue of the waste heat recovery system, and is discharged into a chimney through a draught fan. At the same time, cold air sent by a waste heat recovery system blower enters a cold air collecting pipe 17, is split into a low-temperature side four-way valve 14 of each heat storage unit, is led into a corresponding heat storage chamber 7 at the other side by the low-temperature side four-way valve 14, passes through the heat storage body 8 from bottom to top in the heat storage chamber 7, absorbs and takes away heat of the heat storage body 8, and hot air after heat exchange is led into a hot air collecting pipe 9 through a high-temperature side four-way valve 3, then enters a main hot air duct of the waste heat recovery system and is sent to the bottom of a heating furnace for combustion. The heat accumulation and heat release of the heat accumulator need a certain time, namely a small period of a single heat accumulation unit, after a small period is completed, the driving motor 16 and the chain transmission mechanism 4 drive two four-way valves in the heat accumulation unit to simultaneously change directions, so that flow directions of smoke and air are switched, flow channels of the smoke and the air are exchanged, the blown-cooled heat accumulation chamber 7 is filled with high-temperature smoke, the heat accumulation chamber 7 is filled with cold air, and therefore the next small period of the heat accumulation unit is entered, and the heat accumulation unit can be used for circulating and continuously exchanging heat, so that the purposes of recovering smoke waste heat and preheating combustion-supporting air are achieved.
In summary, by means of the technical scheme, the combustion air can be preheated by utilizing the waste heat of the recovered flue gas, so that fuel is saved, the heat dissipation loss of the flue gas is reduced, and the heat efficiency of a heating furnace system is improved; the switching actions of the high-temperature side four-way valve and the low-temperature side four-way valve can be synchronized, and the non-channeling four-way valve is adopted in a matching way, so that the problem of channeling and air leakage in the flow direction switching process of the flue gas and the air of the heat accumulating type air preheater is solved, the pressure fluctuation in the flue gas duct is reduced to an extremely low level, the temperature change amplitude in the flue gas duct is small, the change is gentle, the pressure drop loss of the preheater is small, the safe and stable operation of a heating furnace combustion system can be ensured, the combustion efficiency and the heating furnace system heat efficiency are improved, the fuel is saved, and the emission is reduced; each heat storage unit has a cut-off function, has a large load regulation ratio and can adapt to various different working conditions; the honeycomb ceramic tile is adopted as a heat accumulator, is load-resistant and high-temperature-resistant, has high heat exchange efficiency, and can reduce the smoke to be discharged below the low-temperature dew point corrosion temperature; the occupied area is less, the equipment integration degree is higher, the cost is lower, and the operation is simple.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model provides a do not have heat accumulation formula air preheater of scurrying wind, includes steel construction frame (2), its characterized in that, the top of steel construction frame (2) is provided with high temperature flue gas collecting pipe (1), the top of high temperature flue gas collecting pipe (1) is provided with hot flue gas entry (a), the bottom of high temperature flue gas collecting pipe (1) is provided with a plurality of hot flue gas export, every hot flue gas export is connected with a heat accumulation unit, heat accumulation unit includes high temperature side cross valve (3) and low temperature side cross valve (14), the first valve port of high temperature side cross valve (3) with corresponding hot flue gas export connection, the fourth valve port of high temperature side cross valve (3) is connected hot air collecting pipe (9), be provided with hot air outlet (b) on hot air collecting pipe (9), the first cold flue gas collecting pipe (11) of low temperature side cross valve (14) are provided with cold flue gas export (c), the fourth valve port of low temperature side cross valve (14) is connected with cold air collecting pipe (17) is provided with cold air collecting pipe (17) on the frame, cold air collecting pipe (17) is provided with cold air collecting pipe (17) on the bottom; in every heat accumulation unit, the second valve port of high temperature side cross valve (3) is through first pipeline connection the second valve port of low temperature side cross valve (14), the third valve port of high temperature side cross valve (3) is through second pipeline connection the third valve port of low temperature side cross valve (14), first pipeline with all be provided with regenerator (7) on the second pipeline, the center pin of high temperature side cross valve (3) is through drive mechanism connection the center pin of low temperature side cross valve (14), the center pin of low temperature side cross valve (14) still is connected with driving motor (16), first pipeline with the second pipeline all includes high temperature side 90 elbow flue (5) and low temperature side 90 elbow flue (12), the second valve port of high temperature side cross valve (3) is respectively through high temperature side 90 elbow flue (5) connect regenerator (7), the second valve port of low temperature side cross valve (14) and third valve port pass through low temperature side 90 elbow flue (5) respectively regenerator (12) are connected with regenerator (7) manhole (18) are provided with manhole (18).
2. The regenerative air preheater without channeling wind according to claim 1, characterized in that a heat accumulator (8) is arranged in the heat accumulator (7), and the heat accumulator (8) is a honeycomb ceramic tile.
3. The blowby-free regenerative air preheater of claim 1, wherein the drive motor (16) is an explosion-proof motor.
4. A blowby-free regenerative air preheater as set forth in claim 3, wherein a blow-down pipe (13) is provided on the low temperature side 90 ° bent flue (12).
5. The blowby-free regenerative air preheater as set forth in claim 1, wherein the transmission mechanism is a chain transmission mechanism (4), the chain transmission mechanism (4) includes transmission sprockets respectively disposed on central shafts of the high temperature side four-way valve (3) and the low temperature side four-way valve (14), and two of the transmission sprockets are connected by a transmission chain.
6. The blowby-free regenerative air preheater as set forth in claim 5, wherein a driving sprocket is further provided on a central shaft of the low temperature side four-way valve (14), the driving sprocket is connected with a speed reducer through a driving chain (15), and the speed reducer is connected with the driving motor (16).
7. The blowby-free regenerative air preheater as set forth in claim 5, wherein said hot air collecting pipe (9) and said cold flue gas collecting pipe (11) are vertically penetrated by a chain penetrating pipe (10), said chain penetrating pipe (10) being sleeved outside said transmission chain.
8. The blowby-free regenerative air preheater according to claim 1, wherein the high temperature side four-way valve (3) and the low temperature side four-way valve (14) each comprise a double layer valve plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910510197.6A CN110274256B (en) | 2019-06-13 | 2019-06-13 | Heat accumulating type air preheater without wind channeling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910510197.6A CN110274256B (en) | 2019-06-13 | 2019-06-13 | Heat accumulating type air preheater without wind channeling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110274256A CN110274256A (en) | 2019-09-24 |
| CN110274256B true CN110274256B (en) | 2024-04-30 |
Family
ID=67962101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910510197.6A Active CN110274256B (en) | 2019-06-13 | 2019-06-13 | Heat accumulating type air preheater without wind channeling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110274256B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB925772A (en) * | 1961-02-11 | 1963-05-08 | Perkins Boilers Ltd | Improvements in and relating to heating appliances such as hot water boilers, space heating stoves and cookers |
| JP2006097967A (en) * | 2004-09-29 | 2006-04-13 | Taikisha Ltd | Heat storage type gas treating device, and method of purifying heat storage material layer in the same |
| JP2007314821A (en) * | 2006-05-23 | 2007-12-06 | Nippon Steel Engineering Co Ltd | Method for intercepting heat at repairing time of hot-blast tube line |
| WO2013013364A1 (en) * | 2011-07-28 | 2013-01-31 | Tang Zhongsheng | Direct combustion type plunger hydraulic pump |
| CN105889894A (en) * | 2016-06-13 | 2016-08-24 | 岳阳钟鼎热工电磁科技有限公司 | Phase difference regenerative air preheater and preheating method |
| CN205859977U (en) * | 2016-06-13 | 2017-01-04 | 岳阳钟鼎热工电磁科技有限公司 | A kind of phase contrast regenerative air preheater |
| CN210832076U (en) * | 2019-06-13 | 2020-06-23 | 岳阳恒盛石化科技有限公司 | Air-channeling-free heat accumulating type air preheater |
-
2019
- 2019-06-13 CN CN201910510197.6A patent/CN110274256B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB925772A (en) * | 1961-02-11 | 1963-05-08 | Perkins Boilers Ltd | Improvements in and relating to heating appliances such as hot water boilers, space heating stoves and cookers |
| JP2006097967A (en) * | 2004-09-29 | 2006-04-13 | Taikisha Ltd | Heat storage type gas treating device, and method of purifying heat storage material layer in the same |
| JP2007314821A (en) * | 2006-05-23 | 2007-12-06 | Nippon Steel Engineering Co Ltd | Method for intercepting heat at repairing time of hot-blast tube line |
| WO2013013364A1 (en) * | 2011-07-28 | 2013-01-31 | Tang Zhongsheng | Direct combustion type plunger hydraulic pump |
| CN105889894A (en) * | 2016-06-13 | 2016-08-24 | 岳阳钟鼎热工电磁科技有限公司 | Phase difference regenerative air preheater and preheating method |
| CN205859977U (en) * | 2016-06-13 | 2017-01-04 | 岳阳钟鼎热工电磁科技有限公司 | A kind of phase contrast regenerative air preheater |
| CN210832076U (en) * | 2019-06-13 | 2020-06-23 | 岳阳恒盛石化科技有限公司 | Air-channeling-free heat accumulating type air preheater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110274256A (en) | 2019-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205403139U (en) | Low nitrogen buggy boiler | |
| CN102042609B (en) | Rotary high-temperature air preheater | |
| CN101761935B (en) | Rotary high-temperature air preheater | |
| CN201439949U (en) | Cold ash device | |
| CN210832076U (en) | Air-channeling-free heat accumulating type air preheater | |
| CN201184696Y (en) | Tube type heating stove | |
| CN110274256B (en) | Heat accumulating type air preheater without wind channeling | |
| RU2213307C2 (en) | Water boiler | |
| CN102313354B (en) | Organic heat carrier boiler for environmentally-friendly energy-saving circulating fluidized bed | |
| CN102080933B (en) | Rotary high-temperature air preheater | |
| CN201753918U (en) | Heat energy apparatus for making superheated steam by exhaust heat gas | |
| CN2932200Y (en) | Normal pressure horizontal straight pipe three-return coal hot-water boiler | |
| CN2804649Y (en) | Stereo multi-layer rotary colling dregs and discharging machine | |
| CN206648047U (en) | Energy-saving burned waste gas device | |
| CN2256085Y (en) | Coal air-heating furnace | |
| CN112628724B (en) | Industrial pulverized coal boiler with double horizontal hearths arranged in opposite flushing mode | |
| RU2315918C2 (en) | Steel sectional water-heating boiler disassembled from the front | |
| CN203629342U (en) | Exhaust-heat boiler device for fuel oil type phosphate ore calcining kiln | |
| CN208920096U (en) | A kind of hanging basket regenerative air preheater | |
| CN201041352Y (en) | Building block type heat storage and combustion total radiation boiler | |
| CN207299517U (en) | A kind of biomass thermal wind furnace | |
| CN208059284U (en) | A kind of energy-saving type boiler | |
| CN206648048U (en) | Convenient energy-saving type burned waste gas device | |
| CN206320785U (en) | Forced circulation burning coal powder hot-water boiler | |
| CN201867104U (en) | Horizontal integral heat-tube heat exchanger |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |