CN110975599A - In-furnace denitration system and process - Google Patents

In-furnace denitration system and process Download PDF

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Publication number
CN110975599A
CN110975599A CN201911045270.3A CN201911045270A CN110975599A CN 110975599 A CN110975599 A CN 110975599A CN 201911045270 A CN201911045270 A CN 201911045270A CN 110975599 A CN110975599 A CN 110975599A
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boiler
pipeline
air
flue gas
communicated
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陈治国
杨义球
赵起
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Jiangsu Tianlai Environmental Protection Engineering Co Ltd
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Jiangsu Tianlai Environmental Protection Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4218—Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

A denitration system and a denitration process in a furnace comprise a boiler, a flue of the boiler, a denitration system, an economizer, an air filter, a mixing box and a return channel; the flue gas outlet of the boiler is communicated with one end of a flue of the boiler, and the flue of the boiler is used for discharging flue gas of the boiler flowing out through the flue gas outlet; a denitration system, an economizer and an air filter are sequentially communicated with the flue of the boiler in the direction far away from the boiler; the other end of the flue of the boiler is communicated with a chimney; and the flue part between the air filter and the chimney is also communicated with one end of the backflow channel, and the other end of the backflow channel is communicated with the boiler. The combination with other structures or methods effectively avoids the defects that in the prior art, the flue gas discharged by the boiler is completely and directly discharged to a chimney after passing through a denitration system, the flue gas has no high-efficiency use temperature and is completely discharged to the chimney, and the unburned coal dust particles in the flue gas are completely and directly discharged to the chimney, so that the coal dust particles are completely wasted.

Description

In-furnace denitration system and process
Technical Field
The invention relates to the technical field of denitration, also relates to the technical field of denitration in a furnace, and particularly relates to a system and a process for denitration in the furnace.
Background
The importance of preventing environmental pollution has been pointed out as a worldwide problem, and removal of nitrogen oxides from combustion flue gas is an essential means for preventing environmental pollution, and denitration is essentially a process for removing nitrogen oxides from combustion flue gas.
The mainstream denitration principle aiming at the boiler in the world is that flue gas discharged by the boiler is discharged to a chimney through a flue after passing through a denitration system, all the flue gas is directly discharged to the chimney without flue gas with high efficient use temperature, unburned and complete coal dust particles exist in the flue gas, and all the flue gas is directly discharged to the chimney so that all the coal dust particles are wasted.
In addition, the denitration system generally takes liquid ammonia, urea or ammonia water as a reducing agent, ammonia and nitrogen oxide are subjected to chemical reaction under the action of a catalyst by amino, and NOx in flue gas is reduced to N2And H2And (4) carrying out chemical reaction process of O.
The existing SCR denitration system commonly used comprises: the urea solution storage tank passes through frequency conversion measurement delivery pump and delivers solution to the pipe-line mixer, high-pressure centrifugal fan connects gradually the filter, pipeline drying heater carries the pipeline mixer with dilution air, the filter is when screening the air current that sends through high-pressure centrifugal fan, because pipeline drying heater just carries out dry effect afterwards, can't high-efficiently clear up the moist droplet granule in this air current in the filter, if can't clear up the moist droplet granule in the air current, can appear infringement to the filter and make it impaired.
Disclosure of Invention
In order to solve the problems, the invention provides a denitration system and a denitration process in a furnace, which effectively avoid the defects that in the prior art, flue gas discharged by a boiler passes through a denitration system and is completely and directly discharged to a chimney, the flue gas has no high-efficiency use temperature and the pulverized coal particles which are not completely combusted in the flue gas are completely and directly discharged to the chimney, so that the pulverized coal particles are completely wasted.
In order to overcome the defects in the prior art, the invention provides a solution for a denitration system and a denitration process in a furnace, which comprises the following specific steps:
a denitration system in a furnace comprises a boiler, a flue of the boiler, a denitration system, an economizer, an air filter, a mixing box and a return channel;
the flue gas outlet of the boiler is communicated with one end of a flue of the boiler, and the flue of the boiler is used for discharging flue gas of the boiler flowing out through the flue gas outlet;
a denitration system, an economizer and an air filter are sequentially communicated with the flue of the boiler in the direction far away from the boiler;
the other end of the flue of the boiler is communicated with a chimney;
the flue part between the air filter and the chimney is also communicated with one end of the backflow channel, and the other end of the backflow channel is communicated with the boiler;
and the return passage is sequentially communicated with a mixing box and a blower in the direction close to the boiler.
The denitration system comprises a pipeline mixer, and the pipeline mixer and the high-pressure centrifugal fan are both communicated with the multifunctional filter through pipelines;
the multifunctional filter comprises a support table 2, wherein a filter main body 3 and a hollow container 5 are fixedly connected to two sides of the upper end of the support table 2 respectively, and a heat resistance sheet 21 is fixedly connected to the inner surface of the hollow container 5.
The upper end on the left side of the hollow container 5 is communicated with a first pipeline 4, the left side of the first pipeline 4 is communicated with the right side of the filter main body 3, the right side of the first pipeline 4 is communicated with the pipeline mixer, the upper part of the front wall of the hollow container 5 is provided with a PLC8, the upper part of the front wall of the hollow container 5 is fixedly connected with the connecting position of the PLC8 through a connecting piece, the upper end and the lower end on the right side of the hollow container 5 are respectively communicated with a second pipeline 7 and a third pipeline 6, and the second pipeline 7 is also communicated with a high-pressure centrifugal fan.
The bottom of the inner surface of the hollow container 5 is fixedly connected with a guide piece 22, and the guide piece 22 is in a triangular prism shape.
The upper end of the hollow interior of the hollow container 5 is fixedly connected with a motor cabinet 25, the upper end of the inner surface of the motor cabinet 25 is fixedly connected with a motor 24, the upper ends of two sides of the inner surface of the hollow container 5 are provided with stop blocks 9, and the connecting positions of two sides of each stop block 9 and the hollow container 5 are fixedly connected through connecting pieces.
The rotating rod of the motor 24 penetrates through the stop block 9 and extends to the lower end of the stop block 9, the rotating rod of the motor 24 is movably connected with the stop block 9 through a rotary support, the lower end of the rotating rod of the motor 24 is fixedly connected with the rotary drum 10 provided with the spiral blades on the outer wall, and the upper end and the lower end of the hollow interior of the rotary drum 10 provided with the spiral blades on the outer wall are fixedly connected with the supporting table 26.
An electric heating block 28 is fixedly connected between the pair of supporting platforms 26, two sides of the electric heating block 28 are fixedly connected with heat transfer rods 27, the number of the heat transfer rods 27 is more than two, one end of each heat transfer rod 27, which is farther away from the electric heating block 28, is fixedly connected with the inner surface of the rotary drum 10, the outer wall of which is provided with the spiral blades, the lower ends of the two sides of the inner surface of the hollow container 5 are fixedly connected with the splitter 23, the splitter 23 is positioned at the upper end of the third pipeline 6, the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28, and the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28: the PLC8 is electrically connected with the motor 24, the PLC8 is connected with an intermediate relay which is connected in series between the electric heating block 28 and the power supply, and the normally open contact of the intermediate relay is connected in series between the electric heating block 28 and the power supply.
A filter screen is arranged in the first pipeline 4.
The denitration system in the furnace further comprises: the urea storage bin quantitatively feeds materials to the urea dissolving tank through the weighing feeder, the urea dissolving tank is connected to a urea solution storage tank through a urea solution mixing pump, the urea solution storage tank conveys solutions to the pipeline mixer through a variable-frequency metering conveying pump, the high-pressure centrifugal fan is connected with the multifunctional filter to convey diluted air to the pipeline mixer, the pipeline mixer is connected with a urea solution pipe and a spray gun, the spray gun is located in the reciprocating pyrolysis furnace, an auxiliary electric heater and a hot air purging valve are fixedly arranged on the hot air pipe, an ammonia-air mixed gas return valve is also arranged on the reciprocating pyrolysis furnace and connected to an ammonia injection grid through a return pipe, the ammonia injection grid is located in the SCR reactor, and the SCR reactor is communicated on a flue of the boiler and between the boiler and the economizer.
A method of a denitration system in a furnace, comprising:
starting the air blower, sequentially passing the flue gas flowing out from the flue gas outlet of the boiler through the denitration system, the economizer and the air filter in sequence, then dividing the flue gas into two paths, sending one path of flue gas to the chimney through the flue for discharging, sequentially passing the other path of flue gas through the backflow channel, mixing the two paths of flue gas through the mixing box in sequence, and sending the mixed flue gas into the boiler through the air blower.
A use method of a denitration system in a furnace comprises the following steps:
the airflow sent by the high-pressure centrifugal fan is fed into the multifunctional filter through the second pipeline 7, the motor 24 and the electric heating block 28 are operated by the PLC8, and the PLC8 controls the electric heating block 28 to work in the following mode: the PLC8 operates the normally open contact of the intermediate relay to close to conduct the electric heating block 28 and the power supply; the motor 24 pulls the drum 10 having the spiral blades on the outer wall to rotate, and the air flow moves downward by being driven by the drum 10 having the spiral blades on the outer wall, during which the droplet particles having a higher density move downward along with the air flow along the inner surface of the hollow container 5 by the spiral action of the spiral blades, and when the air flow reaches the splitter 23, the separated droplet particles move toward the lower end of the hollow interior of the hollow container 5, the heat flow generated by the electric heating block 28 is transmitted to the drum 10 having the spiral blades on the outer wall via the heat transmission rod 27, the droplet particles in the air flow are vaporized by the heat flow, and the air flow after drying is filtered by the filter screen in the first pipe 4 and then moves into the pipe mixer, and when the liquid is stored in the hollow container 5, the air flow is discharged via the third pipe 6.
The application method of the in-furnace denitration system further comprises the following steps:
the solid granular urea is stored in a urea storage bin, is quantitatively conveyed to a urea dissolving tank through a weighing feeder to be dissolved, 40-50% concentration urea solution is conveyed to a urea solution storage tank through a urea solution mixing pump to be stored, is conveyed to a pipeline mixer through a variable frequency metering conveying pump, and the rest solution flows back to the urea solution storage tank; the diluted air passes through the multifunctional filter by the high-pressure centrifugal fan and is conveyed into the pipeline mixer, and the urea solution and the diluted air are mixed in the pipeline mixer; the mixed solution is sprayed into a reciprocating pyrolysis furnace through a urea solution pipe and a spray gun for pyrolysis, a pyrolysis heat source adopts hot air with the primary air temperature of 350-plus-400 ℃ in a boiler, the hot air in the hot air pipe is heated to 600 ℃ through an auxiliary electric heater, the mixed pyrolysis is carried out through the crossed relative arrangement of a hot air pipe, the urea solution pipe and the spray gun, the reciprocating pyrolysis furnace is at normal pressure, and the temperature is controlled to be 400-plus-500 ℃. In order to avoid the urea crystallization at the bottom of the pyrolysis furnace, a hot air purge valve is opened for purging periodically, and because the temperature and the flow of the ammonia-air mixed gas after pyrolysis are difficult to control when the temperature and the flow of the ammonia-air mixed gas reach the SCR reactor, an ammonia-air mixed gas reflux valve is arranged to reflux the redundant mixed gas into the pyrolysis furnace; the rest part is sprayed into the SCR reactor through an ammonia spraying grid, and the denitration reaction of ammonia and boiler flue gas with nitrogen oxides entering the SCR reactor is completed.
The invention has the beneficial effects that:
the defects that in the prior art, flue gas discharged by a boiler passes through a denitration system and then is completely and directly discharged to a chimney, high-efficiency use temperature flue gas is not available, and unburnt complete coal dust particles in the flue gas are completely and directly discharged to the chimney, so that the coal dust particles are completely wasted are avoided. In addition, the first pipeline, the hollow container, the second pipeline, the PLC, the rotating cylinder with the spiral blades arranged on the outer wall, the splitter plate, the motor, the supporting table, the heat conducting rod and the electric heating block are introduced, so that the defect of poor drying performance of the conventional filter is overcome, the multifunctional filter with good drying performance is not complex in structure and good in drying performance, a large number of liquid drop particles are prevented from invading the filter, the service life of the multifunctional filter is prolonged, and the multifunctional filter is beneficial to application of workers; the range of the connection area between the filter body 3 and the hollow container 5 and the ground surface is enlarged by introducing the support table, the reliability of the multifunctional filter during operation is increased, the liquid accumulated in the hollow container 5 is favorably sent out by arranging the third pipeline, the heat produced by the electric heating block 28 is prevented from having adverse effect on the motor 24 by introducing the stop block, the heat insulation effect is achieved by introducing the heat resisting sheet 21, the heat energy is prevented from being transmitted to the outside, the effect of guiding the air flow is achieved by introducing the guide sheet, the liquid accumulation at the lower end of the inner surface of the hollow container 5 is prevented, the motor 24 is protected by introducing the motor cabinet, and the effect of stabilizing the electric heating block 28 is achieved by arranging the support table.
Drawings
FIG. 1 is a view showing the overall configuration of a denitration system in a furnace according to the present invention.
Fig. 2 is a structural view of the left part of the multifunction filter of the present invention.
Fig. 3 is a structural view of the right portion of the multifunction filter of the present invention.
Fig. 4 is an internal structure view of the hollow container of the present invention.
FIG. 5 is a partial block diagram of a rotor having spiral blades on the outer wall of the rotor according to the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples.
Example 1:
as shown in fig. 1-5, the denitration system in the boiler comprises a boiler, a flue of the boiler, a denitration system, an economizer, an air filter, a mixing box and a return channel; the flue gas outlet of the boiler is communicated with one end of a flue of the boiler, and the flue of the boiler is used for discharging flue gas of the boiler flowing out through the flue gas outlet; a denitration system, an economizer and an air filter are sequentially communicated with the flue of the boiler in the direction far away from the boiler; the other end of the flue of the boiler is communicated with a chimney; the flue part between the air filter and the chimney is also communicated with one end of the backflow channel, and the other end of the backflow channel is communicated with the boiler; and the return passage is sequentially communicated with a mixing box and a blower in the direction close to the boiler. Through such structure, just can utilize the air-blower to come to return the flue gas behind denitration system, economizer and empty filter in the return flow path again in the boiler, still have the flue gas of high temperature just can partly be used by the boiler once more like this, the energy that the boiler consumed just can be practiced thrift to the flue gas of the high temperature that is used by the boiler, improve the utilization efficiency of boiler, in addition, it just also can fully burn to have unburnt complete buggy granule in the flue gas that returns to the boiler, the utilization ratio of flue gas has been improved, effectively avoided among the prior art that the flue gas that the boiler discharged passes through denitration system all directly discharge the chimney but do not have high-efficient use temperature flue gas still, all directly discharge the chimney and make the all extravagant defect of these buggy granule in the flue gas still unburnt complete buggy granule. The denitration system comprises a pipeline mixer, and the pipeline mixer and the high-pressure centrifugal fan are both communicated with the multifunctional filter through pipelines; the multifunctional filter comprises a support table 2 fixed on the ground surface, the connection area range of a filter main body 3 and a hollow container 5 with the ground surface is enlarged by introducing the support table 2, the reliability of the multifunctional filter during operation is improved, the filter main body 3 and the hollow container 5 are fixedly connected to two sides of the upper end of the support table 2 respectively, a heat resistance sheet 21 is fixedly connected to the inner surface of the hollow container 5, and heat insulation effect is achieved by introducing the heat resistance sheet 21, so that heat energy is prevented from being transmitted to the outside. The upper end on the left side of the hollow container 5 is communicated with a first pipeline 4, the left side of the first pipeline 4 is communicated with the right side of the filter main body 3, the right side of the first pipeline 4 is communicated with the pipeline mixer, the upper part of the front wall of the hollow container 5 is provided with a PLC8, the upper part of the front wall of the hollow container 5 is fixedly connected with the connecting position of the PLC8 through a connecting piece such as a screw, the upper end and the lower end on the right side of the hollow container 5 are respectively communicated with a second pipeline 7 and a third pipeline 6, the second pipeline 7 is also communicated with a high-pressure centrifugal fan, and liquid accumulated in the hollow container 5 is favorably sent out through introducing the third pipeline 6. The bottom of the inner surface of the hollow container 5 is fixedly connected with the guide piece 22, and the guide piece 22 is triangular prism-shaped, so that the effect of guiding the air flow is achieved by introducing the guide piece 22, and the lower end of the inner surface of the hollow container 5 is prevented from being stored. The upper end of the hollow inner part of the hollow container 5 is fixedly connected with a motor cabinet 25, the motor cabinet 25 is introduced to play a role of protecting the motor 24, the upper end of the inner surface of the motor cabinet 25 is fixedly connected with the motor 24, the upper ends of two sides of the inner surface of the hollow container 5 are provided with a stop block 9, the two sides of the stop block 9 are fixedly connected with the hollow container 5 through a connecting piece such as a bolt, and the stop block 9 is introduced to prevent heat produced by the electric heating block 28 from adversely affecting the motor 24. The rotating rod of the motor 24 penetrates through the stop block 9 and extends to the lower end of the stop block 9, the rotating rod of the motor 24 is movably connected with the stop block 9 through a rotary support, the lower end of the rotating rod of the motor 24 is fixedly connected with the rotary drum 10 provided with the spiral blades on the outer wall, the upper end and the lower end of the hollow interior of the rotary drum 10 provided with the spiral blades on the outer wall are fixedly connected with a supporting table 26, and the effect of stabilizing the electric heating block 28 is achieved through introducing the supporting table 26. An electric heating block 28 is fixedly connected between the pair of supporting platforms 26, two sides of the electric heating block 28 are fixedly connected with heat transfer rods 27, the number of the heat transfer rods 27 is more than two, one end of each heat transfer rod 27, which is farther away from the electric heating block 28, is fixedly connected with the inner surface of the rotary drum 10, the outer wall of which is provided with the spiral blades, the lower ends of the two sides of the inner surface of the hollow container 5 are fixedly connected with the splitter 23, the splitter 23 is positioned at the upper end of the third pipeline 6, the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28, and the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28: the PLC8 is electrically connected with the motor 24, the PLC8 is connected with an intermediate relay which is connected in series between the electric heating block 28 and the power supply, and the normally open contact of the intermediate relay is connected in series between the electric heating block 28 and the power supply. A filter screen is arranged in the first pipeline 4.
When in use, the airflow sent by the high-pressure centrifugal fan and fed into the multifunctional filter through the second pipeline 7 controls the motor 24 and the electric heating block 28 to work through the PLC8, and the PLC8 controls the electric heating block 28 to work in a mode that: the PLC8 operates the normally open contact of the intermediate relay to close to conduct the electric heating block 28 and the power supply; the motor 24 pulls the rotary drum 10 provided with the spiral blades on the outer wall to rotate, and meanwhile, the air flow moves downwards under the driving of the rotary drum 10 provided with the spiral blades on the outer wall, during this time, the denser droplet particles follow the inner surface of the hollow vessel 5 downward with the gas flow under the swirling action of the helical blades, when the air flow reaches the splitter 23, the separated droplet particles move toward the lower end of the hollow interior of the hollow container 5, the heat flow generated by the electric heating block 28 is transferred to the rotary drum 10 provided with the spiral paddle on the outer wall through the heat transfer rod 27, the droplet particles in the air flow are vaporized by the heat flow, the drying performance is improved, the air flow after drying is filtered by the filter screen in the first pipeline 4 and then moves into the pipeline mixer, and when the hollow container 5 is provided with the liquid storage, the liquid storage is discharged through the third pipeline 6.
In a word, the multifunctional filter with drying performance and filter performance simultaneously overcomes the defect of poor drying performance of the traditional filter through the introduced first pipeline 4, the hollow container 5, the second pipeline 7, the PLC8, the rotary drum 10 with the spiral blades arranged on the outer wall, the splitter 23, the motor 24, the supporting table 26, the heat transfer rod 27 and the electric heating block 28.
A method for a denitration system in a furnace, comprising:
starting the air blower, sequentially passing the flue gas flowing out from the flue gas outlet of the boiler through the denitration system, the economizer and the air filter in sequence, then dividing the flue gas into two paths, sending one path of flue gas to the chimney through the flue for discharging, sequentially passing the other path of flue gas through the backflow channel, mixing the two paths of flue gas through the mixing box in sequence, and sending the mixed flue gas into the boiler through the air blower. Through such structure, just can utilize the air-blower to come to return the flue gas behind denitration system, economizer and empty filter in the return flow path again in the boiler, still have the flue gas of high temperature just can partly be used by the boiler once more like this, the energy that the boiler consumed just can be practiced thrift to the flue gas of the high temperature that is used by the boiler, improve the utilization efficiency of boiler, in addition, it just also can fully burn to have unburnt complete buggy granule in the flue gas that returns to the boiler, the utilization ratio of flue gas has been improved, effectively avoided among the prior art that the flue gas that the boiler discharged passes through denitration system all directly discharge the chimney but do not have high-efficient use temperature flue gas still, all directly discharge the chimney and make the all extravagant defect of these buggy granule in the flue gas still unburnt complete buggy granule. In addition, the economizer also serves as a device for recovering the waste heat of exhausted smoke, heats boiler feed water into a heating surface of saturated water under the pressure of a steam drum, and reduces the smoke exhaust temperature of the smoke due to the fact that the economizer absorbs the heat of high-temperature smoke, saves energy and improves efficiency. The air filter can play further filtering action to the flue gas, and the mixing box can play the effect of mixing the flue gas.
The application method of the in-furnace denitration system comprises the following steps:
the airflow sent by the high-pressure centrifugal fan is fed into the multifunctional filter through the second pipeline 7, the motor 24 and the electric heating block 28 are operated by the PLC8, and the PLC8 controls the electric heating block 28 to work in the following mode: the PLC8 operates the normally open contact of the intermediate relay to close to conduct the electric heating block 28 and the power supply; the motor 24 pulls the rotary drum 10 provided with the spiral blades on the outer wall to rotate, and meanwhile, the air flow moves downwards under the driving of the rotary drum 10 provided with the spiral blades on the outer wall, during this time, the denser droplet particles follow the inner surface of the hollow vessel 5 downward with the gas flow under the swirling action of the helical blades, when the air flow reaches the splitter 23, the separated droplet particles move toward the lower end of the hollow interior of the hollow container 5, the heat flow generated by the electric heating block 28 is transferred to the rotary drum 10 provided with the spiral paddle on the outer wall through the heat transfer rod 27, the droplet particles in the air flow are vaporized by the heat flow, the drying performance is improved, the air flow after drying is filtered by the filter screen in the first pipeline 4 and then moves into the pipeline mixer, and when the hollow container 5 is provided with the liquid storage, the liquid storage is discharged through the third pipeline 6. The denitration system in the furnace further comprises: the urea storage bin quantitatively feeds materials to the urea dissolving tank through the weighing feeder, the urea dissolving tank is connected to a urea solution storage tank through a urea solution mixing pump, the urea solution storage tank conveys solutions to the pipeline mixer through a variable-frequency metering conveying pump, the high-pressure centrifugal fan is connected with the multifunctional filter to convey diluted air to the pipeline mixer, the pipeline mixer is connected with a urea solution pipe and a spray gun, the spray gun is located in the reciprocating pyrolysis furnace, the auxiliary electric heater and the hot air purging valve are fixedly arranged on the hot air pipe, the ammonia-air mixed gas return valve is also arranged on the reciprocating pyrolysis furnace and connected to the ammonia injection grid through the return pipe, and the ammonia injection grid is located in the SCR reactor. The application method of the in-furnace denitration system further comprises the following steps:
the solid granular urea is stored in a urea storage bin, is quantitatively conveyed to a urea dissolving tank through a weighing feeder to be dissolved, 40-50% concentration urea solution is conveyed to a urea solution storage tank through a urea solution mixing pump to be stored, is conveyed to a pipeline mixer through a variable frequency metering conveying pump, and the rest solution flows back to the urea solution storage tank; the diluted air passes through the multifunctional filter by the high-pressure centrifugal fan and is conveyed into the pipeline mixer, and the urea solution and the diluted air are mixed in the pipeline mixer; the mixed solution is sprayed into a reciprocating pyrolysis furnace through a urea solution pipe and a spray gun for pyrolysis, a pyrolysis heat source adopts hot air with the primary air temperature of 350-plus-400 ℃ in a boiler, the hot air in the hot air pipe is heated to 600 ℃ through an auxiliary electric heater, the mixed pyrolysis is carried out through the crossed relative arrangement of a hot air pipe, the urea solution pipe and the spray gun, the reciprocating pyrolysis furnace is at normal pressure, and the temperature is controlled to be 400-plus-500 ℃. In order to avoid the urea crystallization at the bottom of the pyrolysis furnace, a hot air purge valve is opened for purging periodically, and because the temperature and the flow of the ammonia-air mixed gas after pyrolysis are difficult to control when the temperature and the flow of the ammonia-air mixed gas reach the SCR reactor, an ammonia-air mixed gas reflux valve is arranged to reflux the redundant mixed gas into the pyrolysis furnace; the rest part is sprayed into the SCR reactor through an ammonia spraying grid, and the denitration reaction of ammonia and nitrogen oxides is completed.
Example 2:
as shown in fig. 1-5, the denitration system in the furnace comprises a pipeline mixer, wherein the pipeline mixer and the high-pressure centrifugal fan are communicated with a multifunctional filter through pipelines; the multifunctional filter comprises a support table 2 fixed on the ground surface, the connection area range of a filter main body 3 and a hollow container 5 with the ground surface is enlarged by introducing the support table 2, the reliability of the multifunctional filter during operation is improved, the filter main body 3 and the hollow container 5 are fixedly connected to two sides of the upper end of the support table 2 respectively, a heat resistance sheet 21 is fixedly connected to the inner surface of the hollow container 5, and heat insulation effect is achieved by introducing the heat resistance sheet 21, so that heat energy is prevented from being transmitted to the outside. The upper end on the left side of the hollow container 5 is communicated with a first pipeline 4, the left side of the first pipeline 4 is communicated with the right side of the filter main body 3, the right side of the first pipeline 4 is communicated with the pipeline mixer, the upper part of the front wall of the hollow container 5 is provided with a PLC8, the upper part of the front wall of the hollow container 5 is fixedly connected with the connecting position of the PLC8 through a connecting piece such as a screw, the upper end and the lower end on the right side of the hollow container 5 are respectively communicated with a second pipeline 7 and a third pipeline 6, the second pipeline 7 is also communicated with a high-pressure centrifugal fan, and liquid accumulated in the hollow container 5 is favorably sent out through introducing the third pipeline 6. The bottom of the inner surface of the hollow container 5 is fixedly connected with the guide piece 22, and the guide piece 22 is triangular prism-shaped, so that the effect of guiding the air flow is achieved by introducing the guide piece 22, and the lower end of the inner surface of the hollow container 5 is prevented from being stored. The upper end of the hollow inner part of the hollow container 5 is fixedly connected with a motor cabinet 25, the motor cabinet 25 is introduced to play a role of protecting the motor 24, the upper end of the inner surface of the motor cabinet 25 is fixedly connected with the motor 24, the upper ends of two sides of the inner surface of the hollow container 5 are provided with a stop block 9, the two sides of the stop block 9 are fixedly connected with the hollow container 5 through a connecting piece such as a bolt, and the stop block 9 is introduced to prevent heat produced by the electric heating block 28 from adversely affecting the motor 24. The rotating rod of the motor 24 penetrates through the stop block 9 and extends to the lower end of the stop block 9, the rotating rod of the motor 24 is movably connected with the stop block 9 through a rotary support, the lower end of the rotating rod of the motor 24 is fixedly connected with the rotary drum 10 provided with the spiral blades on the outer wall, the upper end and the lower end of the hollow interior of the rotary drum 10 provided with the spiral blades on the outer wall are fixedly connected with a supporting table 26, and the effect of stabilizing the electric heating block 28 is achieved through introducing the supporting table 26. An electric heating block 28 is fixedly connected between the pair of supporting platforms 26, two sides of the electric heating block 28 are fixedly connected with heat transfer rods 27, the number of the heat transfer rods 27 is more than two, one end of each heat transfer rod 27, which is farther away from the electric heating block 28, is fixedly connected with the inner surface of the rotary drum 10, the outer wall of which is provided with the spiral blades, the lower ends of the two sides of the inner surface of the hollow container 5 are fixedly connected with the splitter 23, the splitter 23 is positioned at the upper end of the third pipeline 6, the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28, and the PLC8 is respectively in control connection with the motor 24 and the electric heating block 28: the PLC8 is electrically connected with the motor 24, the PLC8 is connected with an intermediate relay which is connected in series between the electric heating block 28 and the power supply, and the normally open contact of the intermediate relay is connected in series between the electric heating block 28 and the power supply. A filter screen is arranged in the first pipeline 4.
When in use, the airflow sent by the high-pressure centrifugal fan and fed into the multifunctional filter through the second pipeline 7 controls the motor 24 and the electric heating block 28 to work through the PLC8, and the PLC8 controls the electric heating block 28 to work in a mode that: the PLC8 operates the normally open contact of the intermediate relay to close to conduct the electric heating block 28 and the power supply; the motor 24 pulls the rotary drum 10 provided with the spiral blades on the outer wall to rotate, and meanwhile, the air flow moves downwards under the driving of the rotary drum 10 provided with the spiral blades on the outer wall, during this time, the denser droplet particles follow the inner surface of the hollow vessel 5 downward with the gas flow under the swirling action of the helical blades, when the air flow reaches the splitter 23, the separated droplet particles move toward the lower end of the hollow interior of the hollow container 5, the heat flow generated by the electric heating block 28 is transferred to the rotary drum 10 provided with the spiral paddle on the outer wall through the heat transfer rod 27, the droplet particles in the air flow are vaporized by the heat flow, the drying performance is improved, the air flow after drying is filtered by the filter screen in the first pipeline 4 and then moves into the pipeline mixer, and when the hollow container 5 is provided with the liquid storage, the liquid storage is discharged through the third pipeline 6.
In a word, the multifunctional filter with drying performance and filter performance simultaneously overcomes the defect of poor drying performance of the traditional filter through the introduced first pipeline 4, the hollow container 5, the second pipeline 7, the PLC8, the rotary drum 10 with the spiral blades arranged on the outer wall, the splitter 23, the motor 24, the supporting table 26, the heat transfer rod 27 and the electric heating block 28.
The application method of the in-furnace denitration system comprises the following steps:
the airflow sent by the high-pressure centrifugal fan is fed into the multifunctional filter through the second pipeline 7, the motor 24 and the electric heating block 28 are operated by the PLC8, and the PLC8 controls the electric heating block 28 to work in the following mode: the PLC8 operates the normally open contact of the intermediate relay to close to conduct the electric heating block 28 and the power supply; the motor 24 pulls the rotary drum 10 provided with the spiral blades on the outer wall to rotate, and meanwhile, the air flow moves downwards under the driving of the rotary drum 10 provided with the spiral blades on the outer wall, during this time, the denser droplet particles follow the inner surface of the hollow vessel 5 downward with the gas flow under the swirling action of the helical blades, when the air flow reaches the splitter 23, the separated droplet particles move toward the lower end of the hollow interior of the hollow container 5, the heat flow generated by the electric heating block 28 is transferred to the rotary drum 10 provided with the spiral paddle on the outer wall through the heat transfer rod 27, the droplet particles in the air flow are vaporized by the heat flow, the drying performance is improved, the air flow after drying is filtered by the filter screen in the first pipeline 4 and then moves into the pipeline mixer, and when the hollow container 5 is provided with the liquid storage, the liquid storage is discharged through the third pipeline 6. The denitration system in the furnace further comprises: the urea storage bin quantitatively feeds materials to the urea dissolving tank through the weighing feeder, the urea dissolving tank is connected to a urea solution storage tank through a urea solution mixing pump, the urea solution storage tank conveys solutions to the pipeline mixer through a variable-frequency metering conveying pump, the high-pressure centrifugal fan is connected with the multifunctional filter to convey diluted air to the pipeline mixer, the pipeline mixer is connected with a urea solution pipe and a spray gun, the spray gun is located in the reciprocating pyrolysis furnace, the auxiliary electric heater and the hot air purging valve are fixedly arranged on the hot air pipe, the ammonia-air mixed gas return valve is also arranged on the reciprocating pyrolysis furnace and connected to the ammonia injection grid through the return pipe, and the ammonia injection grid is located in the SCR reactor. The application method of the in-furnace denitration system further comprises the following steps:
the solid granular urea is stored in a urea storage bin, is quantitatively conveyed to a urea dissolving tank through a weighing feeder to be dissolved, 40-50% concentration urea solution is conveyed to a urea solution storage tank through a urea solution mixing pump to be stored, is conveyed to a pipeline mixer through a variable frequency metering conveying pump, and the rest solution flows back to the urea solution storage tank; the diluted air passes through the multifunctional filter by the high-pressure centrifugal fan and is conveyed into the pipeline mixer, and the urea solution and the diluted air are mixed in the pipeline mixer; the mixed solution is sprayed into a reciprocating pyrolysis furnace through a urea solution pipe and a spray gun for pyrolysis, a pyrolysis heat source adopts hot air with the primary air temperature of 350-plus-400 ℃ in a boiler, the hot air in the hot air pipe is heated to 600 ℃ through an auxiliary electric heater, the mixed pyrolysis is carried out through the crossed relative arrangement of a hot air pipe, the urea solution pipe and the spray gun, the reciprocating pyrolysis furnace is at normal pressure, and the temperature is controlled to be 400-plus-500 ℃. In order to avoid the urea crystallization at the bottom of the pyrolysis furnace, a hot air purge valve is opened for purging periodically, and because the temperature and the flow of the ammonia-air mixed gas after pyrolysis are difficult to control when the temperature and the flow of the ammonia-air mixed gas reach the SCR reactor, an ammonia-air mixed gas reflux valve is arranged to reflux the redundant mixed gas into the pyrolysis furnace; the rest part is sprayed into the SCR reactor through an ammonia spraying grid, and the denitration reaction of ammonia and nitrogen oxides is completed.
The PLC is also connected with a memory for realizing the purpose of on-site data backup, the PLC stores data for controlling the action of the relay in the memory as stored data in real time, and for realizing the purpose of on-site data monitoring in the memory, the PLC is also connected with a wireless communication module, a wireless PDA is arranged for on-site workers, and the wireless communication module is wirelessly connected with the wireless PDA, so that the stored data can be taken out from the memory by the PLC, and then the stored data is transmitted to the PLC and is transmitted to the wireless PDA of the on-site workers by the PLC through the wireless communication module for displaying, thereby realizing the purpose of monitoring the stored data.
However, in an era that enterprise personnel share data more and more importantly, when a field worker wants to transmit a stored data to the handheld terminals of all sharers in the sharing list of all wireless PDAs, the field worker needs to select the corresponding stored data through the wireless PDA, and then transmits the stored data to the handheld terminals of all sharers in the local sharing list through the wireless PDA, so that the operation process is extremely complicated; and when some handheld terminals are not beside the sharer, are in a condition of being exhausted and actually incapable of being used; the field worker can not transmit the stored data to the handheld terminals of the sharers in the sharing list under the condition that the field worker can not operate, great inconvenience is brought to the field worker, and the effect of the field worker on operating the wireless PDA is poor; the sharing table comprises the IP addresses of the handheld terminals of all sharers. The handheld terminal can also be a wireless PDA.
The PLC is also connected with a memory for achieving the purpose of on-site data backup, the PLC stores data for controlling the action of the relay in the memory as stored data in real time, and for achieving the purpose of on-site data monitoring in the memory, the PLC is also connected with a wireless communication module, a wireless PDA is equipped for on-site workers, and the wireless communication module is wirelessly connected with the wireless PDA, so that the stored data can be taken out of the memory through the PLC, then the stored data is transmitted to the PLC and is transmitted to the wireless PDA of the on-site workers through the wireless communication module by the PLC for displaying, and the purpose of monitoring the stored data is achieved.
In an era when enterprise personnel sharing data is increasingly important, field workers often need to transmit a stored data to the handheld terminals of all sharers in a sharing list of all wireless PDAs, and the IP addresses of the handheld terminals of all sharers are included in the sharing list. The handheld terminal can also be a wireless PDA.
The method for transferring a stored data to the hand-held terminals of each sharer in the sharing list of the whole wireless PDA comprises the following steps:
a-1, the wireless PDA transmits the sharing table of the wireless PDA and the IP address of the backup server where the sharing table of the wireless PDA is located to a processing terminal by means of the uniform selection broadcast command recorded by a field worker. The processing terminal can be a PC.
The uniform selection broadcast command in A-1 is a command for representing a field worker to select all the handheld terminals of sharers in the sharing list of the wireless PDA to transmit stored data to be transmitted;
a-2, the processing terminal obtains all sharing tables in the backup server according to the IP address of the backup server, deduces the number K of the corresponding handheld terminals of the sharer in the sharing table of the wireless PDA, and also derives the number L of the corresponding handheld terminals of all the sharers in all the sharing tables;
here, since the shared tables of all wireless PDAs of the same site worker are stored in the same storage area of the backup server, the all shared tables obtained by the processing terminal in a-2 include the shared tables of all wireless PDAs of the site worker.
A-3, comparing K and L, when L is higher than K, executing grouping to the hand-held terminals of all sharers, dividing the group into a plurality of groups of sharing table I, and sequentially transmitting each sharing table I to the wireless PDA;
a-3, the process of grouping the handheld terminals of the total sharers into the first sharing table of a plurality of groups comprises the following steps: executing grouping by using the number of the handheld terminals of the sharers corresponding to each sharing table I as K, and dividing the grouping into L/K group sharing tables I; if L is 1500 and K is 25, then the grouping is performed with the number of handheld terminals of each sharer corresponding to one sharing table being 25, and the sharing table is divided into 60 groups, that is, 1500 ÷ 25 ═ 60 groups of sharing tables one; when L ÷ K cannot be divided evenly, the number of handheld terminals of the sharer in the unremoved part serves as the number of handheld terminals of the sharer in the sharing table one of the last group, as if L is 570, K is 20, L ÷ K ═ 28, the unremoved part of which is 1, the sharing table of the first 28 groups is divided into 29 groups, where the number of handheld terminals of the sharer corresponding to the sharing table of the first 28 groups is 20, and the number of handheld terminals of the sharer corresponding to the sharing table of the 29 th group is 1.
In step A-3, when transmitting each sharing table I to the wireless PDA, the processing terminal also concurrently displays the transmitted sharing table I and the sequence of the sharing table I in the group; the field worker can know the condition and the process of the stored data transmission in real time.
Here, when L is not over K, then the processing terminal responds to the corresponding wireless PDA with a grouping failure message and terminates the process; the wireless PDA receives the grouping failure message, and then transmits the stored data to be transmitted to the handheld terminal of each sharer corresponding to the sharing table of the wireless PDA by means of the existing mode.
A-4, after receiving each sharing table one, the wireless PDA transfers the stored data to be transferred to the handheld terminal of each sharer in the sharing table one of the corresponding group;
in A-4, after receiving a sharing table I, the wireless PDA firstly adds the identification of all sharer hand-held terminals or the title of the sharer hand-held terminal of the sharing table I of the corresponding group into a receiver entry area of the storage data to be transmitted, and then transmits the storage data to be transmitted which is selected in advance to the identification of the sharer hand-held terminal in the receiver entry area or the identification of the corresponding sharer hand-held terminal corresponding to the title of the sharer hand-held terminal of the sharer by means of a transmission command entered by a field worker. The name of the handheld terminal of the sharer can be a unique number of the handheld terminal of the sharer or a unique user name of the handheld terminal of the sharer; the identity of the sharer's handheld terminal can be the mac address of the wireless PDA or the account number of the MSN running on it.
The method that the wireless PDA stores the sharing table of the wireless PDA to the backup server is also included before the A-1; the wireless PDA stores the sharing table of the wireless PDA to the backup server as follows:
b-1, said wireless PDA transmitting a sharing table storing request message with wireless PDA message, sharing table of said wireless PDA to the backup server;
b-2, the backup server judges whether the backup server is a storage area with the sharing table of the wireless PDA corresponding to the wireless PDA message or not by means of the sharing table storage request message; if so, B-3 is executed; if not, B-4 is executed;
b-3, storing the sharing table of the wireless PDA into the storage area of the sharing table of the wireless PDA;
b-4, configuring the storage area of the sharing table of the wireless PDA for the wireless PDA in the backup server, and storing the sharing table of the wireless PDA into the storage area of the sharing table of the wireless PDA.
Here, the wireless PDA message can be a name of the wireless PDA, a MAC address of the wireless PDA; the same field worker is a field worker with the same wireless PDA; as if the corresponding wireless PDAs of the plurality of wireless PDAs were consistently referred to as all easters, then it was determined that the plurality of wireless PDAs belonged to the same worker at the site.
Here, the selective broadcast command has an identification of the wireless PDA. The processing terminal performs grouping on the handheld terminals of the total sharer, and the following processing is further included after the processing terminal is divided into the sharing table I of a plurality of groups: the processing terminal backups the storage data of the group, adds the identifier of the wireless PDA to the storage data of the group, and stores the storage data of the group of the added identifier of the wireless PDA to the storage area of the sharing table of the wireless PDA corresponding to the wireless PDA in the backup server.
Here, the following treatment method is also included after a-1: the processing terminal judges whether the storage data of the grouping added with the wireless PDA identification exists in the backup server or not; if yes, the processing terminal obtains the stored data of the groups and sequentially transmits a sharing table one of each group in the stored data of the groups to the wireless PDA; if not, the processing terminal executes A-2 and A-3. The clustered storage data can be reused, so that the storage data transmission processing mode is greatly reduced, and the loss of software and hardware of the whole system is reduced.
Thus, by storing the shared tables of all wireless PDAs of the same worker on site in the same storage area of the backup server; the wireless PDA transmits the sharing table of the wireless PDA and the IP address of the backup server where the sharing table of the wireless PDA is located to a processing terminal by means of an equal selection broadcast command input by a field worker; the processing terminal obtains all sharing tables in the backup server, deduces the number K of the handheld terminals of the sharer corresponding to the sharing table of the wireless PDA, and also derives the number L of the handheld terminals of the sharer corresponding to all the sharing tables; comparing K and L, when L is higher than K, grouping the hand-held terminals of all sharers, dividing the hand-held terminals into a plurality of group sharing tables I, and sequentially transmitting each group sharing table I to the wireless PDA; the method is characterized in that after the wireless PDA receives the sharing table I of each group, the stored data to be transmitted is transmitted to the handheld terminals of each sharer in the sharing table I of the corresponding group, the site worker can transmit the stored data to the handheld terminals of each sharer in the sharing tables of all the wireless PDAs of the site worker only by activating the uniformly-selected broadcast command through any operable wireless PDA, and the condition that other wireless PDAs are not in operable condition is not considered.
Aiming at the method for delivering a stored data to the handheld terminals of all sharers in the sharing list of the whole wireless PDA, a set of system architecture is provided, and the system architecture comprises the following steps: the system comprises a backup server, a plurality of wireless PDAs of workers on the same site and a processing terminal. The backup server is used for storing the sharing list of the wireless PDA of all the wireless PDAs of the same field worker in the same storage area of the backup server. Each wireless PDA is used for transmitting the sharing table of the wireless PDA and the IP address of the backup server where the sharing table of the wireless PDA is located to a processing terminal by means of the uniform selection broadcast command input by a field worker; and receiving the sharing table I of each group transmitted by the intelligent terminal, and transmitting the stored data to be transmitted to the handheld terminal of each sharer in the sharing table I of the corresponding group after receiving each group of sharing table I. The processing terminal is used for obtaining all sharing tables in the backup server by means of the sharing table of the wireless PDA and the storage area address of the sharing table of the wireless PDA in the backup server, which are transmitted by the wireless PDA, deducing the number K of the handheld terminals of the sharer corresponding to the sharing table of the wireless PDA, and the number L of the handheld terminals of the total sharer corresponding to all the sharing tables; comparing K with L, when L is higher than K, executing grouping to all sharing persons' hand-held terminals, dividing into several groups of sharing table one, and transmitting each group of sharing table one to the wireless PDA in sequence.
The uniform selection broadcast command represents a command that a field worker selects all the handheld terminals of the sharers in the sharing list of the wireless PDA to transmit the stored data to be transmitted;
here, since the shared tables of all the wireless PDAs of the same site worker are stored in the same storage area of the backup server, the all-shared table obtained by the processing terminal here includes the shared tables of the wireless PDAs of all the wireless PDAs of the site worker.
Here, when L is not over K, then the processing terminal responds to the corresponding wireless PDA with a grouping failure message and terminates the process; the wireless PDA receives the grouping failure message, and then transmits the stored data to be transmitted to the handheld terminal of each sharer corresponding to the sharing table of the wireless PDA by means of the existing mode.
After receiving a sharing table, the wireless PDA firstly adds the identification of all sharer hand-held terminals or the title of the sharer hand-held terminal of a corresponding group of sharing tables to a recipient entry area of the stored data to be transferred, and then transfers the stored data to be transferred selected in advance to the identification of the sharer hand-held terminal in the recipient entry area or the identification of the corresponding sharer hand-held terminal by the title of the sharer hand-held terminal by means of a transfer command entered by a field worker. The name of the handheld terminal of the sharer can be a unique number of the handheld terminal of the sharer or a unique user name of the handheld terminal of the sharer; the identity of the sharer's handheld terminal can be the mac address of the wireless PDA or the account number of the MSN running on it.
In the architecture, the wireless PDA is further configured to communicate a shared table save request message with a wireless PDA message, a shared table of the wireless PDA, to a backup server; the backup server is further used for judging whether the backup server is a storage area with the sharing table of the wireless PDA corresponding to the wireless PDA message or not by the backup server through the sharing table storage request message; if yes, storing the sharing table of the wireless PDA into the storage area of the sharing table of the wireless PDA; if not, the storage area of the sharing table of the wireless PDA is configured for the wireless PDA at the backup server, and the sharing table of the wireless PDA is stored in the storage area of the sharing table of the wireless PDA. The wireless PDA message can be the name of the wireless PDA and the MAC address of the wireless PDA; the same field worker is a field worker with the same wireless PDA; as if the corresponding wireless PDAs of the plurality of wireless PDAs were consistently referred to as all easters, then it was determined that the plurality of wireless PDAs belonged to the same worker at the site.
Here, the selective broadcast command has an identification of the wireless PDA. The processing terminal performs grouping on the handheld terminals of the total sharer, and the following processing is further included after the processing terminal is divided into the sharing table I of a plurality of groups: the processing terminal backups the storage data of the group, adds the identifier of the wireless PDA to the storage data of the group, and stores the storage data of the group of the added identifier of the wireless PDA to the storage area of the sharing table of the wireless PDA corresponding to the wireless PDA in the backup server.
Here, the processing terminal is further configured to determine whether there is stored data of a group to which the wireless PDA identifier is added in the backup server after receiving the IP address of the backup server in which the sharing table of the wireless PDA and the sharing table of the wireless PDA transmitted by the wireless PDA are located; if yes, the processing terminal obtains the stored data of the groups and sequentially transmits a sharing table one of each group in the stored data of the groups to the wireless PDA; if not, the processing terminal executes A-2 and A-3. The clustered storage data can be reused, so that the storage data transmission processing mode is greatly reduced, and the loss of software and hardware of the whole system is reduced.
Here, the processing terminal is further configured to, when transferring the first sharing table of each group to the wireless PDA, concurrently display the transferred first sharing table at the time of the transfer, and further change the order of the first sharing table of the group in the grouping; the field worker can know the condition and progress of the stored data transmission in real time.
Here, the processing terminal is further configured to perform grouping on the handheld terminals of the total sharer, and the process of dividing the handheld terminals of the total sharer into the first sharing table of the plurality of groups includes: executing grouping by using the number of the handheld terminals of the sharers corresponding to each sharing table I as K, and dividing the grouping into L/K group sharing tables I; if L is 1500 and K is 25, then the grouping is performed with the number of handheld terminals of each sharer corresponding to one sharing table being 25, and the sharing table is divided into 60 groups, that is, 1500 ÷ 25 ═ 60 groups of sharing tables one; when L ÷ K cannot be divided evenly, the number of handheld terminals of the sharer in the unremoved part serves as the number of handheld terminals of the sharer in the sharing table one of the last group, as if L is 570, K is 20, L ÷ K ═ 28, the unremoved part of which is 1, the sharing table of the first 28 groups is divided into 29 groups, where the number of handheld terminals of the sharer corresponding to the sharing table of the first 28 groups is 20, and the number of handheld terminals of the sharer corresponding to the sharing table of the 29 th group is 1.
Thus, by storing the shared tables of all wireless PDAs of the same worker on site in the same storage area of the backup server; the wireless PDA transmits the sharing table of the wireless PDA and the IP address of the backup server where the sharing table of the wireless PDA is located to a processing terminal by means of an equal selection broadcast command input by a field worker; the processing terminal obtains all sharing tables in the backup server, deduces the number K of the handheld terminals of the sharer corresponding to the sharing table of the wireless PDA, and also derives the number L of the handheld terminals of the sharer corresponding to all the sharing tables; comparing K and L, when L is higher than K, grouping the hand-held terminals of all sharers, dividing the hand-held terminals into a plurality of group sharing tables I, and sequentially transmitting each group sharing table I to the wireless PDA; the method is characterized in that after the wireless PDA receives the sharing table I of each group, the stored data to be transmitted is transmitted to the handheld terminals of each sharer in the sharing table I of the corresponding group, the site worker can transmit the stored data to the handheld terminals of each sharer in the sharing tables of all the wireless PDAs of the site worker only by activating the uniformly-selected broadcast command through any operable wireless PDA, and the condition that other wireless PDAs are not in operable condition is not considered.
The present invention has been described in an illustrative manner by the embodiments, and it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, but is capable of various changes, modifications and substitutions without departing from the scope of the present invention.

Claims (10)

1. A denitration system in a furnace is characterized by comprising a boiler, a flue of the boiler, a denitration system, an economizer, an air filter, a mixing box and a return channel;
the flue gas outlet of the boiler is communicated with one end of a flue of the boiler, and the flue of the boiler is used for discharging flue gas of the boiler flowing out through the flue gas outlet;
a denitration system, an economizer and an air filter are sequentially communicated with the flue of the boiler in the direction far away from the boiler;
the other end of the flue of the boiler is communicated with a chimney;
the flue part between the air filter and the chimney is also communicated with one end of the backflow channel, and the other end of the backflow channel is communicated with the boiler;
and the return passage is sequentially communicated with a mixing box and a blower in the direction close to the boiler.
2. The in-furnace denitration system of claim 1, wherein the denitration system comprises a pipeline mixer, and the pipeline mixer and the high-pressure centrifugal fan are both communicated with the multifunctional filter through pipelines;
the multifunctional filter comprises a supporting table, wherein a filter main body and a hollow container are fixedly connected to two sides of the upper end of the supporting table respectively, and a heat resistance sheet is fixedly connected to the inner surface of the hollow container.
3. The system for denitration in a furnace according to claim 2, wherein the upper end of the left side of the hollow container is communicated with a first pipeline, the left side of the first pipeline is communicated with the right side of the filter body, the right side of the first pipeline is communicated with the pipeline mixer, the upper part of the front wall of the hollow container is provided with a PLC, the upper part of the front wall of the hollow container is fixedly connected with the PLC through a connecting piece, the upper end and the lower end of the right side of the hollow container are respectively communicated with a second pipeline and a third pipeline, and the second pipeline is also communicated with the high-pressure centrifugal fan;
the bottom of the inner surface of the hollow container is fixedly connected with a guide sheet, and the guide sheet is triangular prism-shaped.
4. The system of claim 2, wherein the motor cabinet is fixedly connected to the upper end of the hollow interior of the hollow container, the motor is fixedly connected to the upper end of the inner surface of the motor cabinet, and the stoppers are provided at the upper ends of both sides of the inner surface of the hollow container, and both sides of the stoppers are fixedly connected to the hollow container via the connecting members.
5. The system of claim 4, wherein the rotating shaft of the motor penetrates the stopper and extends to a lower end of the stopper, the rotating shaft of the motor is movably connected to the stopper via a rotary bearing, the lower end of the rotating shaft of the motor is fixedly connected to the rotating drum having the spiral blades on the outer wall, and the upper end and the lower end of the hollow interior of the rotating drum having the spiral blades on the outer wall are fixedly connected to the supporting table.
6. The system of claim 4, wherein a pair of the supporting platforms are fixedly connected with an electric heating block, two sides of the electric heating block are fixedly connected with two or more heat transfer rods, one end of each heat transfer rod, which is farther from the electric heating block, is fixedly connected with an inner surface of a rotating drum, which is provided with spiral blades on an outer wall, the lower ends of the two sides of the inner surface of the hollow container are fixedly connected with a splitter plate, the splitter plates are positioned at the upper end of the third pipeline, the PLC is respectively in control connection with the motor and the electric heating block, and the PLC is respectively in control connection with the motor and the electric heating block and has the following structure: the PLC is electrically connected with the motor, the PLC is connected with an intermediate relay connected in series between the electric heating block and a power supply, and a normally open contact of the intermediate relay is connected in series between the electric heating block and the power supply;
a filter screen is arranged in the first pipeline.
7. The denitration system in a furnace according to claim 4, further comprising: the urea storage bin quantitatively feeds materials to the urea dissolving tank through the weighing feeder, the urea dissolving tank is connected to a urea solution storage tank through a urea solution mixing pump, the urea solution storage tank conveys solutions to the pipeline mixer through a variable-frequency metering conveying pump, the high-pressure centrifugal fan is connected with the multifunctional filter to convey diluted air to the pipeline mixer, the pipeline mixer is connected with a urea solution pipe and a spray gun, the spray gun is located in the reciprocating pyrolysis furnace, the auxiliary electric heater and the hot air purging valve are fixedly arranged on the hot air pipe, the ammonia-air mixed gas return valve is also arranged on the reciprocating pyrolysis furnace and connected to the ammonia injection grid through the return pipe, and the ammonia injection grid is located in the SCR reactor.
8. A method for a denitration system in a furnace, comprising:
starting the air blower, sequentially passing the flue gas flowing out from the flue gas outlet of the boiler through the denitration system, the economizer and the air filter in sequence, then dividing the flue gas into two paths, sending one path of flue gas to the chimney through the flue for discharging, sequentially passing the other path of flue gas through the backflow channel, mixing the two paths of flue gas through the mixing box in sequence, and sending the mixed flue gas into the boiler through the air blower.
9. A use method of a denitration system in a furnace is characterized by comprising the following steps:
the air flow that conveys high-pressure centrifugal fan conveys in to multi-functional filter through the second pipeline, through PLC8 control motor and electric heat piece work, the mode that PLC controlled electric heat piece work is: the PLC controls a normally open contact of the intermediate relay to be closed so as to conduct the electric heating block and a power supply; the motor pulls the rotary drum with the spiral blades on the outer wall to rotate, meanwhile, the air flow moves downwards under the driving of the rotary drum with the spiral blades on the outer wall, during the period, liquid drop particles with higher density move downwards along with the air flow under the spiral action of the spiral blades according to the inner surface of the hollow container, when the air flow reaches the splitter plate, the separated liquid drop particles move towards the lower end of the hollow inner part of the hollow container, heat flow generated by the electric heating block is transmitted to the rotary drum with the spiral blades on the outer wall through the heat transmission rod, the liquid drop particles in the air flow are vaporized through the heat flow, the air flow after drying moves towards the pipeline mixer after being filtered through the filter screen in the first pipeline, and when the liquid is stored in the hollow container, the air flow is discharged through the third pipeline.
10. The method of using a denitration system in a furnace according to claim 9, further comprising:
the solid granular urea is stored in a urea storage bin, is quantitatively conveyed to a urea dissolving tank through a weighing feeder to be dissolved, 40-50% concentration urea solution is conveyed to a urea solution storage tank through a urea solution mixing pump to be stored, is conveyed to a pipeline mixer through a variable frequency metering conveying pump, and the rest solution flows back to the urea solution storage tank; the diluted air passes through the multifunctional filter by the high-pressure centrifugal fan and is conveyed into the pipeline mixer, and the urea solution and the diluted air are mixed in the pipeline mixer; the mixed solution is sprayed into a reciprocating pyrolysis furnace through a urea solution pipe and a spray gun for pyrolysis, a pyrolysis heat source adopts hot air with the primary air temperature of 350-plus-400 ℃ in a boiler, the hot air in the hot air pipe is heated to 600 ℃ through an auxiliary electric heater, the mixed pyrolysis is carried out through the crossed relative arrangement of a hot air pipe, the urea solution pipe and the spray gun, the reciprocating pyrolysis furnace is at normal pressure, and the temperature is controlled to be 400-plus-500 ℃. In order to avoid the urea crystallization at the bottom of the pyrolysis furnace, a hot air purge valve is opened for purging periodically, and because the temperature and the flow of the ammonia-air mixed gas after pyrolysis are difficult to control when the temperature and the flow of the ammonia-air mixed gas reach the SCR reactor, an ammonia-air mixed gas reflux valve is arranged to reflux the redundant mixed gas into the pyrolysis furnace; the rest part is sprayed into the SCR reactor through an ammonia spraying grid, and the denitration reaction of ammonia and nitrogen oxides is completed.
CN201911045270.3A 2019-10-30 2019-10-30 In-furnace denitration system and process Pending CN110975599A (en)

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