CN112628792B - Separation type air preheating system for preventing ABS (anti-lock brake System) of air preheater from being blocked and operation method - Google Patents
Separation type air preheating system for preventing ABS (anti-lock brake System) of air preheater from being blocked and operation method Download PDFInfo
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- CN112628792B CN112628792B CN202011594113.0A CN202011594113A CN112628792B CN 112628792 B CN112628792 B CN 112628792B CN 202011594113 A CN202011594113 A CN 202011594113A CN 112628792 B CN112628792 B CN 112628792B
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- 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
- F23L15/04—Arrangements of recuperators
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- 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
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a separated air preheating system for preventing ABS (acrylonitrile-butadiene-styrene) blockage of an air preheater and an operation method thereof, and the separated air preheating system comprises a heating system, a cooling system, a heat exchange system and a purification system, wherein the heating system comprises a flue gas heating box, an electric heating plate is arranged in the flue gas heating box, the cooling system comprises a flue gas cooling box, a cooling plate is arranged in the flue gas cooling box, the cooling plate is semicircular, the system can preheat flue gas through heating equipment, then the flue gas is cooled through cooling equipment, ABS in the flue gas is rapidly condensed on the cooling plate, the ABS on the cooling plate is rapidly cleaned through rotation of an auger, the aim of cleaning the ABS is achieved, the cooling plate can be ensured to cool and condense the ABS all the time, the efficiency of removing the ABS is improved, the blockage caused by the ABS is prevented, and heat in the flue gas can be exchanged to air in an air inlet hole for heating, the combustion efficiency of the boiler is improved, energy is saved, emission is reduced, and the boiler is convenient to use by people.
Description
Technical Field
The invention relates to the field of air preheating systems, in particular to a separated air preheating system for preventing an air preheater ABS from being blocked and an operation method.
Background
The coal used in coal-fired power plants contains sulfur, SO3 is generated during combustion, and the content of the SO3 is influenced by factors such as the sulfur content of coal types and the like and ranges from a few ppm to dozens of ppm. Limited by the emission standards of flue gas, coal-fired power plants are equipped with SCR systems for removing NOx produced by combustion. In addition, a catalyst in the SCR system has a certain catalytic effect on SO3 oxidized from SO2 in flue gas, SO that the amount of SO3 oxidized from SO2 in the SCR reactor can be changed within the range of 0.3-2%. SO3 and NH3 in the flue gas react under certain conditions to generate NH4HSO4, NH4HSO4 is in a liquid state at the temperature range of 147 ℃ -207 ℃, has strong viscosity and is easily adhered to the surface of a heat exchange fin of the air preheater, in addition, when the temperature of an outlet of the air preheater is low, H2SO4 in the flue gas is condensed, SO that the heat exchange surface is corroded, meanwhile, fly ash in the flue gas is easily adhered by the strong viscosity, SO that the pressure difference between an inlet and an outlet of the air preheater is gradually increased, the blockage is gradually increased, and the output of a unit is finally influenced. Aiming at the problem of blockage of an air preheater, a power plant usually adopts modes of steam soot blowing or air heater application and the like to relieve the blockage, which affects the economical efficiency of a unit and increases the coal consumption on one hand, and on the other hand, the blockage problem can not be solved fundamentally, when the blockage is serious, the power plant needs to be stopped and washed by high-pressure water, which affects the load factor of the unit, and for the separated air preheating system and the method for preventing the ABS blockage of the air preheater, which have the application number of CN202010105344.4, the method adopts a hot section heat storage element to heat air, then utilizes a cold section heat storage element to condense the ABS in smoke, most of the ABS condenses on the cold section heat storage element, because the cold section heat storage element is always in a cooling state, the ABS on the cold section heat storage element is difficult to be cleaned, although the ABS is prevented from affecting other devices, the cleaning of the ABS on the cold section heat storage element can not be solved by simply blowing away by a fan, the long-time accumulation can cause the cold section heat accumulation element to be thicker and thicker, so that the cooling effect is poor, ABS of smoke can not be condensed, and the use of the whole system is influenced.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned problems of the prior art by providing a separate air preheating system and an operating method thereof for preventing ABS blockage of an air preheater.
In order to achieve the purpose, the invention provides the following technical scheme: prevent disconnect-type air preheating system of air heater ABS jam, including heating system, cooling system, heat exchange system and clean system, heating system includes the flue gas heating cabinet, the internally mounted of flue gas heating cabinet has the electric heating board, cooling system includes the flue gas cooling cabinet, the internally mounted of flue gas cooling cabinet has the cooling plate, the cooling plate is semi-circular, the bottom of cooling plate is equipped with the auger, the gear box is installed to the one end of auger, the motor is installed to one side of gear box, the condenser is installed to one side of flue gas cooling cabinet, install first circulating pump on the condenser, heat exchange system includes first heat exchange box and second heat exchange box, the internally mounted of first heat exchange box has first heating pipe, the internally mounted of second heat exchange box has the second heating pipe, first heating pipe and second heating pipe pass through the second circulating pump and link to each other, the centrifugal fan is installed at the top of the second heat exchange box, the air inlet groove is installed at the top of the centrifugal fan, the purification system comprises a flue gas filter box, and a second exhaust pipe is installed at the top of the flue gas filter box.
As a preferred technical solution of the present invention, the second heat exchange box is connected to a boiler through an intake pipe, and the boiler is connected to the flue gas heating box through a first exhaust pipe.
As a preferred technical scheme of the present invention, the flue gas heating tank and the flue gas cooling tank are connected through a gas pipe, and the flue gas cooling tank is connected with the first heat exchange tank through a connecting pipe.
As a preferable technical scheme of the invention, the bottom of the flue gas cooling box is connected with a dust collection box, the cooling plate is arranged on the inner part of the flue gas cooling box through bolts, the cooling plate is respectively connected with the first circulating pump and the condenser through liquid conveying pipes, and the first circulating pump and the condenser are both arranged on one side of the flue gas cooling box through bolts.
As a preferred technical scheme of the invention, one end of the packing auger is provided with a bearing, the other end of the packing auger is fixedly connected with a gear in the gear box, and the motor is arranged on one side of the gear box through a bolt.
As a preferable aspect of the present invention, the flue gas heating box is installed on the bottom of the second heat exchange box by bolts, the second heat exchange box is installed on the first heat exchange box by bolts, the first heat exchange box is installed on the flue gas cooling box by bolts, and the flue gas cooling box is installed on the top of the dust collecting box by bolts.
As a preferred embodiment of the present invention, the centrifugal fan is installed on the top of the second heat exchange box by bolts, the first heating pipe is installed on the inside of the first heat exchange box by a fixing frame, and the second heating pipe is installed on the inside of the second heat exchange box by a fixing frame.
A method of operating a split air preheater system for preventing ABS blockage in an air preheater,
the method comprises the following steps: SCR outlet flue gas in the boiler enters the flue gas heating box through a first exhaust pipe, is rapidly heated through an electric heating plate and is conveyed into a flue gas cooling box through a gas conveying pipe;
step two: the cooling liquid on the cooling plate flows through the brake of the condenser and the first circulating pump, so that the temperature of the cooling plate is reduced, the ABS in the flue gas can be rapidly cooled and condensed on the bottom of the cooling plate through the heated flue gas by the cooling plate, meanwhile, the motor is braked to drive the gear in the gear box to rotate, the gear in the gear box is rotated to drive the auger to rotate around the bearing so as to clean the ABS at the bottom of the cooling plate, and the ABS falls into the dust collection box;
step three: air flows out of the two sides of the cooling plate into the first heat exchange box, the first heating pipe is heated by hot smoke, and a second circulating pump is used for braking so as to convey heat-conducting liquid in the second heating pipe to the first heating pipe, so that heat exchange is realized;
step four: meanwhile, the centrifugal fan is braked so as to convey the outside air into the second heat exchange box through the air inlet groove, the outside air is contacted with the second heating pipe so as to improve the heat of the air, the air is heated by the second heating pipe and conveyed into the boiler through the air inlet pipe;
step five: and the smoke after heat exchange is subjected to impurity filtration through the smoke filtration box and then is discharged from the second exhaust pipe.
The invention has the beneficial effects that: this system can preheat the flue gas through firing equipment, then the rethread cooling equipment cools off the flue gas, let ABS in the flue gas condense fast on the cooling plate, rotate ABS on the cooling plate through the auger and clear up fast, not only reach the purpose of clearance ABS, also ensure that the cooling plate can cool off ABS all the time and condense, the efficiency of ABS is got rid of in the improvement, also prevent the jam because of ABS causes, can also exchange the air that gives the air inlet hole with the heat in the flue gas and heat, the combustion efficiency of boiler is improved, energy saving and emission reduction, and the people of being convenient for use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of the system of the present invention.
In the figure: 1. boiler, 2, first blast pipe, 3, flue gas heating cabinet, 4, electric heating board, 5, flue gas cooling cabinet, 6, dust-collecting box, 7, condenser, 8, first circulating pump, 9, motor, 10, gear box, 11, cooling plate, 12, auger, 13, first heat exchange box, 14, second heat exchange box, 15, first heating pipe, 16, second heating pipe, 17, flue gas rose box, 18, second blast pipe, 19, air inlet duct, 20, centrifugal fan, 21, second circulating pump, 22, intake pipe, 23, gas-supply pipe.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example (b): referring to fig. 1-2, the present invention provides a technical solution: a separated air preheating system for preventing an air preheater from being blocked by ABS comprises a heating system, a cooling system, a heat exchange system and a purification system, wherein the heating system comprises a flue gas heating box 3, an electric heating plate 4 is arranged inside the flue gas heating box 3, the cooling system comprises a flue gas cooling box 5, a cooling plate 11 is arranged inside the flue gas cooling box 5, the cooling plate 11 is semicircular, an auger 12 is arranged at the bottom of the cooling plate 11, a gear box 10 is arranged at one end of the auger 12, a motor 9 is arranged at one side of the gear box 10, a condenser 7 is arranged at one side of the flue gas cooling box 5, a first circulating pump 8 is arranged on the condenser 7, the heat exchange system comprises a first heat exchange box 13 and a second heat exchange box 14, a first heating pipe 15 is arranged inside the first heat exchange box 13, a second heating pipe 16 is arranged inside the second heat exchange box 14, the first heating pipe 15 is connected with the second heating pipe 16 through a second circulating pump 21, the centrifugal fan 20 is installed at the top of the second heat exchange box 14, the air inlet groove 19 is installed at the top of the centrifugal fan 20, the purification system comprises a flue gas filter box 17, and the second exhaust pipe 18 is installed at the top of the flue gas filter box 17.
The second heat exchange box 14 is connected with the boiler 1 through an air inlet pipe 22, and the boiler 1 is connected with the flue gas heating box 3 through a first exhaust pipe 2.
The flue gas heating box 3 is connected with the flue gas cooling box 5 through a gas pipe 23, and the flue gas cooling box 5 is connected with the first heat exchange box 13 through a connecting pipe.
The bottom of flue gas cooling tank 5 is connected with dust collection box 6, and cooling plate 11 passes through the bolt and installs on flue gas cooling tank 5's inside, and cooling plate 11 passes through the transfer line and links to each other with first circulating pump 8 and condenser 7 respectively, and first circulating pump 8 and condenser 7 all pass through the bolt and install on one side of flue gas cooling tank 5.
One end of the packing auger 12 is provided with a bearing, the other end of the packing auger 12 is fixedly connected with a gear in the gear box 10, and the motor 9 is arranged on one side of the gear box 10 through a bolt.
The flue gas heating box 3 is installed on the bottom of the second heat exchange box 14 through bolts, the second heat exchange box 14 is installed on the first heat exchange box 13 through bolts, the first heat exchange box 13 is installed on the flue gas cooling box 5 through bolts, and the flue gas cooling box 5 is installed on the top of the dust collection box 6 through bolts.
The centrifugal fan 20 is installed on the top of the second heat exchange box 14 by bolts, the first heating pipe 15 is installed on the inside of the first heat exchange box 13 by a fixing bracket, and the second heating pipe 16 is installed on the inside of the second heat exchange box 14 by a fixing bracket.
A method of operating a split air preheater system for preventing ABS blockage in an air preheater,
the method comprises the following steps: SCR outlet flue gas in the boiler 1 enters the flue gas heating box 3 through the first exhaust pipe 2, is rapidly heated through the electric heating plate 4, and is then conveyed into the flue gas cooling box 5 through the gas conveying pipe 23;
step two: the cooling liquid on the cooling plate 11 flows through the brake of the condenser 7 and the first circulating pump 8, so that the temperature of the cooling plate 11 is reduced, the ABS in the flue gas can be rapidly cooled and condensed on the bottom of the cooling plate 11 through the heated flue gas passing through the cooling plate 11, meanwhile, the motor 9 is braked so as to drive the gear in the gear box 10 to rotate, the gear in the gear box 10 is rotated so as to drive the packing auger 12 to rotate around the bearing, so that the ABS at the bottom of the cooling plate 11 is cleaned and falls into the dust collection box;
step three: air flows out of the two sides of the cooling plate 11 into the first heat exchange box 13, the first heating pipe 15 is heated by hot flue gas, and the second circulating pump 21 is used for braking so as to convey heat-conducting liquid in the second heating pipe 16 to the first heating pipe 15, so that heat exchange is realized;
step four: meanwhile, the centrifugal fan 20 is braked so as to convey the outside air into the second heat exchange box 14 through the air inlet slot 19, the outside air is in contact with the second heating pipe 16 so as to increase the heat of the air, the air is heated by the second heating pipe 16 and conveyed into the boiler 1 through the air inlet pipe 22;
step five: the heat-exchanged flue gas passes through a flue gas filtering box 17 for impurity filtering and then is discharged from a second exhaust pipe 18.
The working principle is as follows: a separation type air preheating system for preventing an air preheater from being blocked by ABS (anti-lock brake system) and an operation method thereof are disclosed, wherein the separation type air preheating system comprises a boiler 1, a first exhaust pipe 2, a flue gas heating box 3, an electric heating plate 4, a flue gas cooling box 5, a dust collection box 6, a condenser 7, a first circulating pump 8, a motor 9, a gear box 10, a cooling plate 11, an auger 12, a first heat exchange box 13, a second heat exchange box 14, a first heating pipe 15, a second heating pipe 16, a flue gas filtering box 17, a second exhaust pipe 18, an air inlet tank 19, a centrifugal fan 20, a second circulating pump 21, an air inlet pipe 22 and an air conveying pipe 23, and SCR (selective catalytic reduction) outlet flue gas in the boiler 1 enters the flue gas heating box 3 through the first exhaust pipe 2, is rapidly heated through the electric heating plate 4, and then is conveyed into the flue gas cooling box 5 through the air conveying pipe 23; the cooling liquid on the cooling plate 11 flows through the brake of the condenser 7 and the first circulating pump 8, so that the temperature of the cooling plate 11 is reduced, the ABS in the flue gas can be rapidly cooled and condensed on the bottom of the cooling plate 11 through the heated flue gas passing through the cooling plate 11, meanwhile, the motor 9 is braked so as to drive the gear in the gear box 10 to rotate, the gear in the gear box 10 is rotated so as to drive the packing auger 12 to rotate around the bearing, so that the ABS at the bottom of the cooling plate 11 is cleaned and falls into the dust collection box; air flows out of the two sides of the cooling plate 11 into the first heat exchange box 13, the first heating pipe 15 is heated by hot flue gas, and the second circulating pump 21 is used for braking so as to convey heat-conducting liquid in the second heating pipe 16 to the first heating pipe 15, so that heat exchange is realized; meanwhile, the centrifugal fan 20 is braked so as to convey the outside air into the second heat exchange box 14 through the air inlet slot 19, the outside air is in contact with the second heating pipe 16 so as to increase the heat of the air, the air is heated by the second heating pipe 16 and conveyed into the boiler 1 through the air inlet pipe 22; the heat-exchanged flue gas passes through a flue gas filtering box 17 for impurity filtering and then is discharged from a second exhaust pipe 18.
This system can preheat the flue gas through firing equipment, then the rethread cooling equipment cools off the flue gas, let ABS in the flue gas condense fast on the cooling plate, rotate ABS on the cooling plate through the auger and clear up fast, not only reach the purpose of clearance ABS, also ensure that the cooling plate can cool off ABS all the time and condense, the efficiency of ABS is got rid of in the improvement, also prevent the jam because of ABS causes, can also exchange the air that gives the air inlet hole with the heat in the flue gas and heat, the combustion efficiency of boiler is improved, energy saving and emission reduction, and the people of being convenient for use.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. Prevent air heater ABS's jam disconnect-type air preheating system, including heating system, cooling system, heat exchange system and clean system, its characterized in that: the heating system comprises a flue gas heating box (3), the internal mounting of the flue gas heating box (3) is provided with an electric heating plate (4), the cooling system comprises a flue gas cooling box (5), the internal mounting of the flue gas cooling box (5) is provided with a cooling plate (11), the cooling plate (11) is semicircular, the bottom of the cooling plate (11) is provided with an auger (12), one end of the auger (12) is provided with a gear box (10), one side of the gear box (10) is provided with a motor (9), one side of the flue gas cooling box (5) is provided with a condenser (7), the condenser (7) is provided with a first circulating pump (8), the heat exchange system comprises a first heat exchange box (13) and a second heat exchange box (14), the internal mounting of the first heat exchange box (13) is provided with a first heating pipe (15), the internal mounting of the second heat exchange box (14) is provided with a second heating pipe (16), first heating pipe (15) and second heating pipe (16) link to each other through second circulating pump (21), centrifugal fan (20) are installed at the top of second heat exchange box (14), air inlet duct (19) are installed to the top of centrifugal fan (20), clean system includes flue gas rose box (17), second blast pipe (18) are installed to the top of flue gas rose box (17).
2. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the second heat exchange box (14) is connected with the boiler (1) through an air inlet pipe (22), and the boiler (1) is connected with the flue gas heating box (3) through a first exhaust pipe (2).
3. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the flue gas heating box (3) is connected with the flue gas cooling box (5) through a gas conveying pipe (23), and the flue gas cooling box (5) is connected with the first heat exchange box (13) through a connecting pipe.
4. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the bottom of flue gas cooling tank (5) is connected with dust collection box (6), cooling plate (11) pass through the bolt and install on the inside of flue gas cooling tank (5), cooling plate (11) link to each other with first circulating pump (8) and condenser (7) respectively through the transfer line, first circulating pump (8) and condenser (7) all install on one side of flue gas cooling tank (5) through the bolt.
5. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the bearing is installed to the one end of auger (12), the other end of auger (12) links to each other with the gear in gear box (10) is fixed, motor (9) pass through the bolt and install on one side of gear box (10).
6. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the flue gas heating box (3) is installed on the bottom of the second heat exchange box (14) through bolts, the second heat exchange box (14) is installed on the first heat exchange box (13) through bolts, the first heat exchange box (13) is installed on the flue gas cooling box (5) through bolts, and the flue gas cooling box (5) is installed on the top of the dust collection box (6) through bolts.
7. The system and method of operating a split air preheater ABS blocking prevention according to claim 1, wherein: the centrifugal fan (20) is installed on the top of the second heat exchange box (14) through bolts, the first heating pipe (15) is installed on the inside of the first heat exchange box (13) through a fixing frame, and the second heating pipe (16) is installed on the inside of the second heat exchange box (14) through a fixing frame.
8. A method of operating a split air preheater ABS blocking prevention according to any one of claims 1 to 7, wherein:
the method comprises the following steps: SCR outlet flue gas in the boiler (1) enters the flue gas heating box (3) through the first exhaust pipe (2), is rapidly heated through the electric heating plate (4), and is conveyed into the flue gas cooling box (5) through the gas conveying pipe (23);
step two: the cooling liquid on the cooling plate (11) flows through the condenser (7) and the first circulating pump (8) in a braking manner, so that the temperature of the cooling plate (11) is reduced, the heated flue gas can enable the ABS in the flue gas to be rapidly cooled and condensed on the bottom of the cooling plate (11) through the cooling plate (11), meanwhile, the motor (9) is braked so as to drive the gear in the gear box (10) to rotate, the gear in the gear box (10) is rotated so as to drive the packing auger (12) to rotate around the bearing, so that the ABS at the bottom of the cooling plate (11) is cleaned and falls into the dust collection box;
step three: air flows out of the two sides of the cooling plate (11) into the first heat exchange box (13), the first heating pipe (15) is heated by hot flue gas, and the second circulating pump (21) is used for braking so as to convey heat-conducting liquid in the second heating pipe (16) to the first heating pipe (15), so that heat exchange is realized;
step four: meanwhile, the centrifugal fan (20) is braked so as to convey the outside air into the second heat exchange box (14) through the air inlet groove (19), the outside air is contacted with the second heating pipe (16) so as to improve the heat of the air, the air is heated by the second heating pipe (16), and the air is conveyed into the boiler (1) through the air inlet pipe (22);
step five: the heat-exchanged flue gas passes through a flue gas filtering box (17) to be subjected to impurity filtering and then is discharged from a second exhaust pipe (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594113.0A CN112628792B (en) | 2020-12-29 | 2020-12-29 | Separation type air preheating system for preventing ABS (anti-lock brake System) of air preheater from being blocked and operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594113.0A CN112628792B (en) | 2020-12-29 | 2020-12-29 | Separation type air preheating system for preventing ABS (anti-lock brake System) of air preheater from being blocked and operation method |
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| CN112628792A CN112628792A (en) | 2021-04-09 |
| CN112628792B true CN112628792B (en) | 2021-09-28 |
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| CN114001368A (en) * | 2021-11-01 | 2022-02-01 | 连云港虹洋热电有限公司 | Flue gas purification and recycling device of coal-fired boiler and control system thereof |
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| CN111306568A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Device and method for relieving blockage of rotary air preheater by preheating heat storage element through hot air |
| CN111306566A (en) * | 2020-02-20 | 2020-06-19 | 华电电力科学研究院有限公司 | Separation type air preheating system and method for preventing ABS (anti-lock brake System) of air preheater from being blocked |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207094650U (en) * | 2017-07-10 | 2018-03-13 | 东方电气集团东方锅炉股份有限公司 | The rotary regenerative air preheater that a kind of anti-ammonium hydrogen sulfate blocks |
| CN207648843U (en) * | 2017-11-13 | 2018-07-24 | 湖南大唐节能科技有限公司 | Double heat source air preheaters block controlling device |
| CN111306566A (en) * | 2020-02-20 | 2020-06-19 | 华电电力科学研究院有限公司 | Separation type air preheating system and method for preventing ABS (anti-lock brake System) of air preheater from being blocked |
| CN111306568A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Device and method for relieving blockage of rotary air preheater by preheating heat storage element through hot air |
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