CN210373517U

CN210373517U - Fly ash treatment system

Info

Publication number: CN210373517U
Application number: CN201920948695.4U
Authority: CN
Inventors: 徐复兴; 曹连芬; 孙亚军; 王平
Original assignee: Elion Technology Suqian Co ltd
Current assignee: Elion Technology Suqian Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-21
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses a fly ash processing system, wherein: including storing up grey system, primary air transshipment system, combustion system and secondary return air system, it includes a plurality of fly ash storage cylinder to store up grey system, every fly ash storage cylinder is the cylinder tube-shape container that the bottom was provided with the ash leakage fill, the ash leakage valve is installed to ash leakage fill lower extreme, fly ash storage cylinder upper end is uncovered, this uncovered covering covers the dust separation net, it goes up the ash pipe to have connect one on the lateral wall of fly ash storage cylinder, go up the ash pipe upper end and stretch into to fly ash storage cylinder upper portion opening in, the lower extreme is located fly ash storage cylinder lower part, it is equipped with the butt joint mouth to go up the ash pipe lower extreme, this butt joint mouth is used for and the butt joint of fly ash delivery wagon, the fly ash delivery wagon can go into the fly ash. The utility model has the advantages of comprehensive structure and good fly ash treatment effect.

Description

Fly ash treatment system

Technical Field

The utility model belongs to the technical field of energy recovery utilizes, concretely relates to fly ash processing system.

Background

Along with the rapid development of coal-fired power plants in China, the production amount of fly ash is increased year by year, the coal ash reaches 4.8 hundred million t in 2010, the utilization rate is 68%, and the fly ash is mainly utilized as a concrete admixture and a cement admixture, and is used for producing various building material products such as autoclaved aerated concrete, autoclaved fly ash bricks and the like, road construction backfill and the like. The process of the comprehensive utilization of the fly ash is very important work of grinding the fly ash by a fly ash mill. In recent years, the technology for extracting alumina from high-alumina fly ash is successfully researched and developed, industrialization is gradually realized, and experience is provided for extracting high-value components in fly ash. The comprehensive utilization of the fly ash in China goes through three stages of mainly storing, storing and using combined with mainly using, and at present, the pattern of mainly using is basically formed. However, the problem of the unbalance of east and west is more prominent in the overall view. Since 1998, a large number of coal-fired power plants in China are built in 22 large and medium-sized coal-electricity bases which are mostly in western regions, the building market capacity is small, the technical and economic conditions are poor, and the comprehensive utilization level of the fly ash is low.

The utilization technology of pulverized coal furnace fly ash (PC ash) in civil engineering and building materials industry is well developed and widely popularized nationwide. The comprehensive utilization of the fly ash in China is mainly applied to the fields of engineering and building materials at present.

After the fly ash is collected by a coal-fired power plant, further treatment is needed, wherein the steps of storage, transportation, combustion and the like of the fly ash are involved, when the fly ash is stored and transported, the fly ash can be stacked in a fly ash bin, because the fly ash still belongs to combustible dust, and accidents such as deflagration and the like can occur in the storage process, how to design a fly ash storage structure is crucial to safely storing the fly ash,

the pulverized coal combustion furnace is required in the pulverized coal combustion step, has a specially designed multi-stage multi-nozzle air supply guide structure, can generate high-temperature vortex for pulverized coal in a short time, has the advantages of complete combustion, high heat utilization rate, smoke prevention and dust control, high efficiency, energy conservation, improvement on working conditions, reduction of labor intensity and the like, and is an ideal product with energy conservation and environmental protection. The high-efficiency pulverized coal combustion technology and the low NOx combustion technology are two contradictory technologies. The generation and discharge of NOx are reduced by controlling the temperature of a combustion area not to be too high, but the combustion rate of pulverized coal is influenced by low-temperature combustion, so that the stability of normal combustion of the pulverized coal can be ensured, the combustion temperature is low, and the problem to be overcome in the pulverized coal ash combustion step is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide fly ash processing system.

In order to realize the technical purpose, the utility model discloses the technical scheme who takes does:

a fly ash treatment system, wherein: the system comprises an ash storage system, a primary air transfer system, a combustion system and a secondary air return system, wherein the ash storage system comprises a plurality of fly ash storage cylinders, each fly ash storage cylinder is a cylindrical container with an ash leakage hopper arranged at the bottom, an ash leakage valve is arranged at the lower end of the ash leakage hopper, the upper end of each fly ash storage cylinder is open, a dust separation net covers the open upper end, an ash feeding pipe is connected to the outer side wall of each fly ash storage cylinder, the upper end of each ash feeding pipe extends into the upper opening of each fly ash storage cylinder, the lower end of each ash feeding pipe is positioned at the lower part of each fly ash storage cylinder, a butt joint is arranged at the lower end of each ash feeding pipe and is used for butt joint with a fly ash conveying vehicle, the fly ash conveying vehicle can pump fly ash into the fly ash storage cylinders through the ash feeding pipes, a flame-proof system is arranged on the ash storage system and comprises a bottom flame, The bottom flame-retardant electromagnetic valve is arranged on the outer portion of the fly ash storage cylinder, the light gas tank is filled with high-pressure light gas, the light gas is oxygen-free gas with unit volume weight lower than that of air, one end of the lower flame-retardant pipe is connected with the light gas tank, the other end of the lower flame-retardant pipe extends into the bottom of the inner cavity of the fly ash storage cylinder, a spray hole is formed in the lower flame-retardant pipe, the bottom flame-retardant electromagnetic valve is arranged on the lower flame-retardant pipe and used for controlling the opening and closing of the lower flame-retardant pipe, the top flame-retardant device comprises a heavy gas tank, a heavy gas conveying pipe and a heavy gas electromagnetic valve, the heavy gas tank is arranged on the outer portion of the fly ash storage cylinder, the heavy gas tank is filled with high-pressure heavy gas, the heavy gas is oxygen-, the heavy gas delivery pipe is provided with spray holes, the heavy gas electromagnetic valve is arranged on the heavy gas delivery pipe and used for controlling the opening and closing of the heavy gas delivery pipe, thermometers are arranged on the fly ash storage cylinder at intervals of a certain height, probes of the thermometers extend into the fly ash storage cylinder and are used for detecting the temperature of fly ash in the fly ash storage cylinder, the primary air transfer system comprises an impeller powder feeder, an air locking device, a coal powder mixer, a transfer fan and a primary air pipe, a feed inlet of the impeller powder feeder is butted with an ash leakage valve, a discharge outlet of the impeller powder feeder is butted with one end of the air locking device, the other end of the air locking device is butted with the coal powder mixer, the coal powder mixer is connected to the middle part of the primary air pipe, the transfer fan is arranged at one end of the primary air pipe and can blow air to the primary air pipe, the fly ash in the pulverized coal bunker, the other end of the primary air pipe is butted with a combustion furnace of a combustion system, the combustion system comprises the combustion furnace, an ignition gun, a gas pipe, a gas supply source and a fire detector, the middle part and the lower part of the combustion furnace are hearth parts, the upper part of the combustion furnace is a burnout part, the bottom of the hearth part is provided with a primary air inlet, the burnout part is provided with a secondary air inlet, the primary air pipe is butted with the primary air inlet, the ignition gun is inserted at the primary air inlet, the ignition gun is connected with the gas pipe, the gas pipe is connected with the gas supply source, the gas supply source can supply gas for the ignition gun, the ignition gun is enabled to ignite the combustion furnace and enable the combustion furnace to continuously burn, the fire detector is inserted in the hearth part and used for monitoring the temperature of the hearth part, the upper end of the burnout part is provided with a burnout air outlet, the secondary air return system comprises a dust remover, an induced draft, the dust remover is arranged on an over-fire air outlet pipeline and used for filtering dust in the over-fire air outlet pipeline, the circulating fan is connected to a pipeline behind the induced draft fan, part of over-fire air exhausted by the induced draft fan is extracted and is secondary air, the switch door is connected between the induced draft fan and the circulating fan and used for controlling the on-off of the pipeline between the induced draft fan and the circulating fan, the circulating fan is in butt joint with an inlet of a secondary air distributor, the secondary air distributor is used for dividing the secondary air extracted by the circulating fan into two parts, the secondary air distributor is provided with two outlets, one outlet is in butt joint with a primary air inlet, the other outlet is in butt joint with a secondary air inlet, the fly ash processing system further comprises a control device, and the control device is respectively in butt joint with an ash leakage valve, a bottom flame-retardant electromagnetic valve, a heavy gas electromagnetic valve, an impeller powder feeder, a gas locking device, the switch door is connected with the circulating fan, can receive signals of the thermometer and the fire detector and control the operation of the ash leakage valve, the bottom flame-retardant electromagnetic valve, the heavy gas electromagnetic valve, the impeller powder feeder, the air locker, the transfer fan, the ignition gun, the switch door and the circulating fan.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the butt joint port is connected with a telescopic flexible pipe head through a flange plate, and the butt joint port is in butt joint with the fly ash conveying vehicle through the flexible pipe head.

The hearth part and the burnout part of the combustion furnace are in sealed butt joint through an elastic compensating ring, so that the combustion furnace is telescopic.

The primary air pipe is provided with a primary air pipe compensator, the pipelines at the front end and the rear end of the circulating fan are provided with secondary air pipe compensators, and the primary air pipe compensator and the secondary air pipe compensator are elastic.

The control device is a PLC.

The secondary air distributor comprises an inner tube cavity of the distributor, a distributor air inlet and a distributor air outlet, one end of the inner tube cavity of the distributor is connected with the distributor air inlet, the other end of the inner tube cavity of the distributor is connected with the distributor air outlet, a tube cavity distributing plate is arranged in the inner tube cavity of the distributor and divides the inner tube cavity of the distributor into two separated air passing channels, the tube cavity distributing plate divides the distributor air outlet into two air outlets, namely a first air outlet and a second air outlet, each air passing channel is provided with an air adjusting plate, the air adjusting plates are in transmission connection with a knob arranged outside the secondary air distributor, and the air adjusting plates can rotate in the air passing channels by rotating the knobs, so that the cross section of the air passing channels shielded by the air adjusting plates is changed, and the air passing amount in the.

Foretell dust remover is including the dust remover import that communicates in proper order, first clean room, the second clean room, third clean room and dust remover export, the below of every clean room all is provided with the collection ash bucket that has the ooff valve, separate through first baffle between first clean room and the second clean room, separate through the second baffle between second clean room and the third clean room, it is gapped with the inboard upper surface of dust remover in first baffle upper end, the upper end and the inboard upper surface sealing connection of dust remover of second baffle, second baffle middle part is provided with the ventilation hole, the one end that the ventilation hole is located the second clean room is less than the one end that is located the third clean room.

A material level meter is arranged on the fly ash storage cylinder at intervals of a certain height and is connected with a control device, and the material level meter is used for monitoring the height of fly ash in the fly ash storage cylinder.

The utility model has the advantages of it is following:

1. the utility model discloses a fire-proof system, can prevent effectively that fly ash from smoldering in fine coal bunker, deflagration, can in time block the fly ash burning, the fire-retardant pipe in lower part is located the fine coal bunker lower part, because light gas is lighter than the air, can the rebound, thereby upwards extrude the air in the fine coal bunker, let lack oxygen in the fine coal bunker, and heavy matter gas conveyer pipe is located fine coal bunker upper portion, heavy matter gas is heavier than the air, can form the gaseous isolation layer of one deck heavy matter on fine coal bunker upper portion, make in the unable fly coal bunker of filling of air on fine coal bunker upper portion, thereby isolated the air from upper portion and lower part, guarantee the unable burning of fly ash in the fine coal bunker.

2. The utility model discloses a set up the thermometer on the powdered coal storehouse, the buggy ash temperature in the powdered coal storehouse of ability real time monitoring, when the temperature was higher than the threshold value, just started fire-retardant device in bottom and the fire-retardant device in top, guaranteed that the fly ash in the powdered coal storehouse does not have the possibility of burning.

3. The utility model discloses all installed the compensator additional on primary air pipe and secondary air pipe, install the pipeline behind the compensator additional can be very long, even the pipeline takes place expend with heat and contract with cold and leads to pipeline length to change, this part length of elasticity compensation that the compensator also can be through self makes the pipeline can not take place the fracture, has solved the problem that the pipeline stability is not enough because of defeated powder pipe length is elongated to lead to. And simultaneously, the utility model discloses still installed on firing burning furnace and had elastic compensation ring, can let fire burning furnace also can have certain elasticity, improve the security that fires burning furnace.

4. The utility model discloses a structure such as impeller powder feeder, airlock, buggy blender is connected fly ash storage cylinder and a tuber pipe, guarantees the entering tuber pipe that fly ash can be steady.

5. The utility model discloses a secondary return air system, the lower characteristics of low oxygen concentration and temperature that the flue gas after effectively utilizing the burning had, carry out the reutilization to the flue gas, circulating fan extracts the part by draught fan exhaust after-fire wind, then the regulation through the accent aerofoil, inject some wind into the import of a wind, some wind injects the import of overgrate air, thereby pour into some flue gas into furnace, some flue gas injection after-fire wind portion, make bulk temperature and oxygen concentration all descend in the pulverized coal burner, but do not influence the normal burning of a wind again simultaneously, can enough guarantee the stability of the normal burning of buggy, lower combustion temperature has again, inhibit the formation of nitrogen oxide in the burner.

6. The utility model discloses a neotype dust remover, this dust remover have three chambeies to remove dust, and every chamber all makes the air current of process turn to, leads to dust striking baffle and dust remover chamber wall in the air current, and deposits gradually in the dust collecting hopper, reaches the purpose of removing dust, and the draught fan at protection rear and circulating fan do not have too many dust interference, hoisting device's life.

7. The middle part of the second clapboard of the dust remover is provided with the inclined vent hole, so that the wind must flow upwards in an inclined way from the middle part of the clapboard, and the dust filtering effect can be obviously improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the construction of a dust collector;

FIG. 3 is a schematic diagram of the construction of the overfire air distributor.

The reference signs are: the system comprises an ash storage system 1, a fly ash storage barrel 11, an ash leakage hopper 11a, an ash leakage valve 11b, a dust separation net 11c, an ash feeding pipe 12, a butt joint port 12a, a flexible pipe head 12b, a primary air operation system 2, an impeller powder feeder 21, an air locker 22, a coal powder mixer 23, a transfer fan 24, a primary air pipe 25, a primary air pipe compensator 25a, a combustion system 3, a combustion furnace 31, a primary air inlet 31a, a secondary air inlet 31b, a burnt air outlet 31c, a compensation ring 31d, an ignition gun 32, a gas pipe 33, a gas supply source 34, a fire detector 35, a secondary air return system 4, a dust remover 41, a dust remover inlet 41a, a first dust removal chamber 41b, a second dust removal chamber 41c, a third dust removal chamber 41d, a dust remover outlet 41e, an ash collection hopper 41f, a first partition plate 41g, a second partition plate 41h, a vent hole 41i, a draught fan 42, a switch door 43, a circulating fan 44, The secondary air distributor 45, a distributor air inlet 45a, a distributor inner cavity 45b, a cavity distribution plate 45c, a first air outlet 45d, a second air outlet 45e, an air adjusting plate 45f, a secondary air pipe compensator 46, a flame-proof system 5, a bottom flame-proof device 51, a light gas tank 51a, a lower flame-proof pipe 51b, a bottom flame-proof electromagnetic valve 51c, a top flame-proof device 52, a heavy gas tank 52a, a heavy gas conveying pipe 52b, a heavy gas electromagnetic valve 52c, a thermometer 53 and a control device 6.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

The fly ash treatment system of this example, wherein: the system comprises an ash storage system 1, a primary air transfer system 2, a combustion system 3 and a secondary air return system 4, wherein the ash storage system 1 comprises a plurality of fly ash storage cylinders 11, each fly ash storage cylinder 11 is a cylindrical container with an ash leakage hopper 11a arranged at the bottom, an ash leakage valve 11b is arranged at the lower end of the ash leakage hopper 11a, the upper end of each fly ash storage cylinder 11 is open, a dust separation net 11c covers the opening, an ash feeding pipe 12 is connected to the outer side wall of each fly ash storage cylinder 11, the upper end of each ash feeding pipe 12 extends into the opening at the upper part of each fly ash storage cylinder 11, the lower end of each fly ash storage cylinder 11 is positioned at the lower part of each fly ash storage cylinder 11, a butt joint 12a is arranged at the lower end of each ash feeding pipe 12, the butt joint 12a fly ash conveying vehicle is used for butt joint with a fly ash conveying vehicle, the fly ash conveying vehicle can pump fly ash into the fly ash storage cylinders 11 through the ash feeding pipes 12, the bottom flame retardant device 51 comprises a light gas tank 51a, a lower flame retardant pipe 51b and a bottom flame retardant electromagnetic valve 51c, the light gas tank 51a is installed outside the fly ash storage cylinder 11, the light gas tank 51a is filled with high-pressure light gas, the light gas is oxygen-free gas with unit volume weight lower than that of air, one end of the lower flame retardant pipe 51b is connected with the light gas tank 51a, the other end of the lower flame retardant pipe extends into the bottom of the inner cavity of the fly ash storage cylinder 11, the lower flame retardant pipe 51b is provided with a spray hole, the bottom flame retardant electromagnetic valve 51c is installed on the lower flame retardant pipe 51b and used for controlling the opening and closing of the lower flame retardant pipe 51b, the top flame retardant device 52 comprises a heavy gas tank 52a, a heavy gas delivery pipe 52b and a heavy gas electromagnetic valve 52c, the heavy gas tank 52a is installed outside the fly ash storage cylinder, the heavy gas is oxygen-free gas with the weight per unit volume higher than that of air, one end of a heavy gas conveying pipe 52b is connected with a heavy gas tank 52a, the other end of the heavy gas conveying pipe extends into the top of the inner cavity of the fly ash storage cylinder 11, a spray hole is formed in the heavy gas conveying pipe 52b, a heavy gas electromagnetic valve 52c is installed on the heavy gas conveying pipe 52b and used for controlling the opening and closing of the heavy gas conveying pipe 52b, thermometers 53 are installed on the fly ash storage cylinder 11 at intervals of a certain height, probes of the thermometers 53 extend into the fly ash storage cylinder 11 and used for detecting the temperature of fly ash in the fly ash storage cylinder 11, the primary air transfer system 2 comprises an impeller powder feeder 21, an air locker 22, a fly ash mixer 23, a transfer fan 24 and a primary air pipe 25, a feed inlet of the impeller powder feeder 21 is butted with an ash leakage valve 11b, a discharge outlet of the impeller powder feeder 21 is butted with, the coal powder mixer 23 is connected to the middle part of the primary air pipe 25, the transfer fan 24 is installed at one end of the primary air pipe 25 and can blow air to the primary air pipe 25, the coal ash in the coal ash storage barrel 11 can enter the primary air pipe 25 through the ash leaking valve 11b, the impeller powder feeder 21, the air locker 22 and the coal powder mixer 23 in sequence, the other end of the primary air pipe 25 is butted with the combustion furnace 31 of the combustion system 3, the combustion system 3 comprises the combustion furnace 31, the ignition gun 32, the gas pipe 33, the gas supply source 34 and the fire detector 35, the middle part and the lower part of the combustion furnace 31 are furnace chamber parts, the upper part of the combustion furnace 31 is a burnout part, the bottom of the furnace chamber part is provided with a primary air inlet 31a, the burnout part is provided with a secondary air inlet 31b, the primary air pipe 25 is butted with the primary air inlet 31a, the ignition gun 32 is inserted at the primary air inlet 31a, the gas supply source 34 can supply gas for the ignition gun 32, so that the ignition gun 32 ignites the combustion furnace 31 and the combustion furnace 31 continuously burns, the fire detector 35 is inserted in the hearth part and used for monitoring the temperature of the hearth part, the upper end of the burnout part is provided with a burnout air outlet 31c, the secondary air return system 4 comprises a dust remover 41, an induced draft fan 42, a switch door 43, a circulating fan 44 and a secondary air distributor 45, the induced draft fan 42 is in butt joint with the burnout air outlet 31c through a burnout air outlet pipeline, the dust remover 41 is installed on the burnout air outlet pipeline and used for filtering dust in the burnout air outlet pipeline, the circulating fan 44 is connected to a pipeline behind the induced draft fan 42 and extracts part of the burnout air discharged by the induced draft fan 42, the part of the burnout air is secondary air, the switch door 43 is connected between the induced draft fan 42 and the circulating fan 44 and used for controlling the on-off of the pipeline between the circulating fan 42 and the circulating fan 44, the secondary air distributor 45 is used for dividing the secondary air pumped by the circulating fan 44 into two parts, the secondary air distributor 45 is provided with two outlets, one outlet is butted with the primary air inlet 31a, the other outlet is butted with the secondary air inlet 31b, the fly ash processing system also comprises a control device 6, the control device 6 is respectively connected with the ash leakage valve 11b, the bottom flame-retardant electromagnetic valve 51c, the heavy gas electromagnetic valve 52c, the thermometer 53, the impeller powder feeder 21, the air locker 22, the transfer fan 24, the ignition gun 32, the fire detector 35, the switch door 43 and the circulating fan 44, can receive signals of the thermometer 53 and the fire detector 35 and controls the operation of the ash leakage valve 11b, the bottom flame-retardant electromagnetic valve 51c, the heavy gas electromagnetic valve 52c, the impeller powder feeder 21, the air locker 22, the transfer fan 24, the ignition gun 32, the switch door 43 and the circulating fan 44.

In the embodiment, the docking port 12a is connected with a flexible pipe head 12b which can stretch out and draw back through a flange, and the docking port 12a is docked with the fly ash conveying vehicle through the flexible pipe head 12 b.

In the embodiment, the hearth portion and the burnout portion of the burner 31 are in sealed abutment with each other through a compensation ring 31d having elasticity, so that the burner 31 is retractable.

In the embodiment, the primary air duct 25 is provided with a primary air duct compensator 25a, the front and rear pipelines of the circulating fan 44 are provided with secondary air duct compensators 46, and the primary air duct compensator 25a and the secondary air duct compensators 46 are elastic.

In the embodiment, the control device 6 is a PLC.

In the embodiment, the secondary air distributor 45 comprises a distributor inner tube cavity 45b, a distributor air inlet 45a and a distributor air outlet, one end of the distributor inner tube cavity 45b is connected with the distributor air inlet 45a, the other end is connected with the distributor air outlet, a tube cavity distributing plate 45c is arranged in the distributor inner tube cavity 45b, the tube cavity distributing plate 45c divides the distributor inner tube cavity 45b into two isolated air channels, the tube cavity distributing plate 45c separates the distributor air outlet into two air outlets, namely a first air outlet 45d and a second air outlet 45e, each air channel is provided with an air adjusting plate 45f, the air adjusting plate 45f is in transmission connection with a knob arranged outside the secondary air distributor 45, the air adjusting plate 45f can rotate in the air channel by rotating the knob, thereby changing the cross section of the air adjusting plate 45f for shielding the air channel and changing the air flow in the air channel.

In the embodiment, the dust remover 41 comprises a dust remover inlet 41a, a first dust removing chamber 41b, a second dust removing chamber 41c, a third dust removing chamber 41d and a dust remover outlet 41e which are communicated in sequence, an ash collecting hopper 41f with a switch valve is arranged below each dust removing chamber, the first dust removing chamber 41b is separated from the second dust removing chamber 41c through a first partition plate 41g, the second dust removing chamber 41c is separated from the third dust removing chamber 41d through a second partition plate 41h, a gap is formed between the upper end of the first partition plate 41g and the inner side upper surface of the dust remover 41, the upper end of the second partition plate 41h is connected with the inner side upper surface of the dust remover 41 in a sealing manner, a vent hole 41i is arranged in the middle of the second partition plate 41h, and one end of the vent hole 41i, which is located in the second dust removing chamber 41c, is lower than one end of.

In the embodiment, a level indicator is arranged on the fly ash storage barrel 11 at intervals of a certain height, and the level indicator is connected with the control device 6 and is used for monitoring the height of fly ash in the fly ash storage barrel 11.

The utility model discloses a use method as follows:

the number of the fly ash storage barrels 11 can be multiple, the structures of the fly ash storage barrels 11 are similar or identical, when a fly ash vehicle conveys fly ash to the fly ash storage barrels 11, a worker butt joints the flexible pipe head 12b with a conveying pump of the fly ash conveying vehicle, simultaneously opens a switch on the ash feeding pipe 12, the conveying pump pumps the fly ash into the ash feeding pipe 12, the fly ash enters the fly ash storage barrels 11 through the ash feeding pipe 12 to be stored, the fly ash is accumulated in the fly ash storage barrels 11, ash leaking valves 11b are installed on ash leaking buckets 11a, the fly ash can be discharged when the fly ash is opened, and the fly ash can be closed at ordinary times. The height of the fly ash storage barrel 11 is 20-50 meters, a group of thermometers 53 are arranged at intervals of height, the thermometers 53 are used for monitoring the temperature of fly ash in the fly ash storage barrel 11, the top flame retardant device 52 and the bottom flame retardant device 51 are not started at ordinary times, and the automatic control device 6 controls the starting only when the temperature of the thermometers is detected to be higher than 65 ℃. The automatic control device 6 is a common PLC, and the internal structure, the chip, and the logic and the structure for controlling the opening and closing of the electromagnetic valve are the prior art. Since the fly ash storage cylinder 11 is generally made of stainless steel or common steel material, the thermal conductivity is high, even if no open fire ignites the fly ash in summer, the temperature in the fly ash storage cylinder 11 may reach more than 65 ℃, which may cause fire hazard, in this embodiment, the used light gas is nitrogen, the heavy gas is carbon dioxide, the automatic control device 6 receives the information of the thermometer 53 in real time, and then the bottom flame-retardant electromagnetic valve 51c and the heavy gas electromagnetic valve 52c are controlled to be opened simultaneously or first and then, so that a carbon dioxide protective layer and a nitrogen protective layer are formed in the fly ash storage cylinder 11, and it is ensured that the oxygen content in the fly ash storage cylinder 11 is extremely low, and the fly. When the temperature of the thermometer 53 is all lower than 65 ℃, the automatic control device 6 closes the bottom flame-retardant solenoid valve 51c and the heavy gas solenoid valve 52 c. The user can control the control device 6 to open the ash leaking valve 11b and the transfer blower 24, the fly ash is drawn into the airlock 22 through the impeller powder feeder 21, the fly ash enters the coal powder mixer 23 after the airlock 22 performs pressure balance, the pressurized fly ash can smoothly enter the primary air pipe 25 from the coal powder mixer 23, otherwise, because the air pressure in the primary air pipe 25 is too large, the fly ash cannot normally enter the primary air pipe 25, the fly ash entering the primary air pipe 25 is blown into the primary air inlet 31a by the transfer blower 24, the gas supply source 34 has the function of the ignition gun 32, the ignition gun 32 ignites the combustion furnace 31, so that the combustion furnace 31 burns by using gas and fly ash as energy sources, the oxygen content of the gas in the combustion furnace 31 is high at the lower part, the upper part is low, the temperature is also high at the lower part, the upper part is low, the burned fly ash gas is discharged from the burnout air outlet 31c, the induced draft fan 42 extracts the, because the gas temperature of the part is lower and the oxygen content is not high, the part is a very good secondary return air material, part of the over-fire air is pumped into a secondary return air pipeline through the circulating fan 44, then the secondary air is pumped into the secondary air distributor 45, the air volume of the first air outlet 45d and the air volume of the second air outlet 45e are different by adjusting the air adjusting plate 45f of the secondary air distributor 45, the first air outlet 45d is in butt joint with the primary air inlet 31a, the second air outlet 45e is in butt joint with the secondary air inlet 31b, and the air volume of the first air outlet 45d is larger than that of the second air outlet 45e, so that the whole temperature and the oxygen concentration in the combustion furnace 31 are reduced, but the normal combustion stability of the pulverized coal is ensured, the combustion temperature is lower, and the generation of nitrogen oxides in the combustion furnace 31 is inhibited. The fire detector 35 monitors the temperature of the hearth in real time, and when the temperature is lower than a threshold value, the fire detector gives an alarm to the control device 6, and the control device 6 closes the combustion system 3 to prevent the combustion furnace 31 from being damaged.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims

1. The fly ash treatment system is characterized in that: including storing up grey system (1), air transfer system (2), combustion system (3) and secondary return air system (4), the ash storage system (1) include a plurality of fly ash storage cylinder (11), every fly ash storage cylinder (11) be the cylinder tube-shape container that the bottom was provided with hourglass ash bucket (11a), hourglass ash bucket (11a) lower extreme install hourglass ash valve (11b), fly ash storage cylinder (11) upper end uncovered, this uncovered covering covers at the top and separates dirt net (11c), the lateral wall of fly ash storage cylinder (11) on connect one and go up ash pipe (12), go up ash pipe (12) upper end and stretch into in fly ash storage cylinder (11) upper portion opening, the lower extreme is located fly ash storage cylinder (11) lower part, it is equipped with butt joint mouth (12a) to go up ash pipe (12) lower extreme, this butt joint mouth (12a) is used for and the butt joint of fly ash delivery wagon, the fly ash conveying vehicle can pump fly ash into a fly ash storage cylinder (11) through an ash feeding pipe (12), a flame-retardant system (5) is installed on the ash storage system (1), the flame-retardant system (5) comprises a bottom flame-retardant device (51) and a top flame-retardant device (52), the bottom flame-retardant device (51) comprises a light gas tank (51a), a lower flame-retardant pipe (51b) and a bottom flame-retardant electromagnetic valve (51c), the light gas tank (51a) is installed outside the fly ash storage cylinder (11), high-pressure light gas is filled in the light gas tank (51a), the light gas is oxygen-free gas with unit volume weight lower than that of air, one end of the lower flame-retardant pipe (51b) is connected with the light gas tank (51a), the other end of the lower flame-retardant pipe extends into the bottom of an inner cavity of the fly ash storage cylinder (11), and a spray hole is formed in the lower flame-retardant pipe (, the bottom flame-retardant electromagnetic valve (51c) is arranged on the lower flame-retardant pipe (51b) and used for controlling the opening and closing of the lower flame-retardant pipe (51b), the top flame-retardant device (52) comprises a heavy gas tank (52a), a heavy gas conveying pipe (52b) and a heavy gas electromagnetic valve (52c), the heavy gas tank (52a) is arranged outside the fly ash storage cylinder (11), high-pressure heavy gas is filled in the heavy gas tank (52a), the heavy gas is oxygen-free gas with the weight per unit volume higher than that of air, one end of the heavy gas conveying pipe (52b) is connected with the heavy gas tank (52a), the other end of the heavy gas conveying pipe extends into the top of the inner cavity of the fly ash storage cylinder (11), a spray hole is formed in the heavy gas conveying pipe (52b), the heavy gas electromagnetic valve (52c) is arranged on the heavy gas conveying pipe (52b) and used for controlling the opening and closing of the, the coal ash conveying system is characterized in that thermometers (53) are installed on the coal ash storage barrel (11) at intervals of a certain height, probes of the thermometers (53) extend into the coal ash storage barrel (11) and are used for detecting the temperature of coal ash in the coal ash storage barrel (11), the primary air conveying system (2) comprises an impeller powder feeder (21), an air locker (22), a coal powder mixer (23), a transfer fan (24) and a primary air pipe (25), a feed inlet of the impeller powder feeder (21) is in butt joint with an ash leakage valve (11b), a discharge outlet of the impeller powder feeder (21) is in butt joint with one end of the air locker (22), the other end of the air locker (22) is in butt joint with the coal powder mixer (23), the coal powder mixer (23) is connected to the middle of the primary air pipe (25), the transfer fan (24) is installed at one end of the primary air pipe (25) and can blow air to the primary air pipe (25, fly ash in the ash storage system (1) can enter a primary air pipe (25) sequentially through an ash leakage valve (11b), an impeller powder feeder (21), an air lock (22) and a coal powder mixer (23), the other end of the primary air pipe (25) is butted with a combustion furnace (31) of a combustion system (3), the combustion system (3) comprises the combustion furnace (31), an ignition gun (32), a gas pipe (33), a gas supply source (34) and a fire detector (35), the middle part and the lower part of the combustion furnace (31) are hearth parts, the upper part of the combustion furnace (31) is a burnout part, the bottom of the hearth part is provided with a primary air inlet (31a), the burnout part is provided with a secondary air inlet (31b), the primary air inlet (31a) is butted with the primary air inlet (25), the ignition gun (32) is inserted at the primary air inlet (31a), and the ignition gun (32) is connected with the gas pipe (33), the gas pipe (33) is connected with a gas supply source (34), the gas supply source (34) can supply gas for the ignition gun (32), the ignition gun (32) can ignite the combustion furnace (31) and enable the combustion furnace (31) to continuously combust, a fire detector (35) is inserted in a hearth part and is used for monitoring the temperature of the hearth part, an over-fire air outlet (31c) is arranged at the upper end of the over-fire part, the secondary air return system (4) comprises a dust remover (41), an induced draft fan (42), a switch door (43), a circulating fan (44) and a secondary air distributor (45), the induced draft fan (42) is in butt joint with the over-fire air outlet (31c) through an over-fire air outlet pipeline, the dust remover (41) is arranged on the over-fire air outlet pipeline and is used for filtering dust in the over-fire air outlet pipeline, the circulating fan (44) is connected on a pipeline behind the induced draft fan (42), and part of over-fire air discharged by the induced draft fan (42) is extracted, the part of over-fire air is secondary air, a switch door (43) is connected between an induced draft fan (42) and a circulating fan (44) and used for controlling the on-off of a pipeline between the induced draft fan (42) and the circulating fan (44), the circulating fan (44) is in butt joint with an inlet of a secondary air distributor (45), the secondary air distributor (45) is used for dividing the secondary air extracted by the circulating fan (44) into two parts, the secondary air distributor (45) is provided with two outlets, one outlet is in butt joint with a primary air inlet (31a), the other outlet is in butt joint with a secondary air inlet (31b), the fly ash treatment system further comprises a control device (6), and the control device (6) is respectively in butt joint with an ash leakage valve (11b), a bottom flame-retardant electromagnetic valve (51c), a heavy gas electromagnetic valve (52c), a thermometer (53), an impeller powder feeder (21), a gas locker (22), a transfer fan (24), The ignition gun (32), the fire detector (35), the switch door (43) and the circulating fan (44) are connected, can receive signals of the thermometer (53) and the fire detector (35), and control the operation of the ash leakage valve (11b), the bottom flame-retardant electromagnetic valve (51c), the heavy gas electromagnetic valve (52c), the impeller powder feeder (21), the air lock (22), the transfer fan (24), the ignition gun (32), the switch door (43) and the circulating fan (44).

2. The fly ash treatment system of claim 1, wherein: the butt joint port (12a) is connected with a telescopic flexible pipe head (12b) through a flange plate, and the butt joint port (12a) is in butt joint with the fly ash conveying vehicle through the flexible pipe head (12 b).

3. A fly ash treatment system as set forth in claim 2 wherein: the hearth part and the burnout part of the combustion furnace (31) are in sealed butt joint through an elastic compensation ring (31d), so that the combustion furnace (31) can stretch.

4. A fly ash treatment system as set forth in claim 3 wherein: the air circulation fan is characterized in that a primary air pipe compensator (25a) is installed on the primary air pipe (25), secondary air pipe compensators (46) are installed on pipelines at the front end and the rear end of the circulation fan (44), and the primary air pipe compensator (25a) and the secondary air pipe compensators (46) are elastic.

5. A fly ash treatment system as set forth in claim 4 wherein: the control device (6) is a PLC.

6. A fly ash treatment system as set forth in claim 5 wherein: the secondary air distributor (45) comprises a distributor inner tube cavity (45b), a distributor air inlet (45a) and a distributor air outlet, one end of the distributor inner tube cavity (45b) is connected with the distributor air inlet (45a), the other end of the distributor inner tube cavity (45b) is connected with the distributor air outlet, a tube cavity distribution plate (45c) is arranged in the distributor inner tube cavity (45b), the tube cavity distribution plate (45c) divides the distributor inner tube cavity (45b) into two separated air passing channels, the tube cavity distribution plate (45c) separates the distributor air outlet into two air outlets, namely a first air outlet (45d) and a second air outlet (45e), each air passing channel is provided with an air adjusting plate (45f), the air adjusting plates (45f) are in transmission connection with a knob arranged outside the secondary air distributor (45), the knob is rotated, and the air adjusting plates (45f) can rotate in the air passing channels, thereby changing the cross section of the air adjusting plate (45f) for shielding the air channel and changing the air flow in the air channel.

7. A fly ash treatment system as set forth in claim 6 wherein: the dust remover (41) comprises a dust remover inlet (41a), a first dust removing chamber (41b), a second dust removing chamber (41c), a third dust removing chamber (41d) and a dust remover outlet (41e) which are communicated in sequence, an ash collecting hopper (41f) with a switch valve is arranged below each dust removing chamber, the first dust removal chamber (41b) and the second dust removal chamber (41c) are separated by a first partition plate (41g), the second dust removal chamber (41c) and the third dust removal chamber (41d) are separated by a second partition plate (41h), a gap is reserved between the upper end of the first clapboard (41g) and the upper surface of the inner side of the dust remover (41), the upper end of the second clapboard (41h) is hermetically connected with the upper surface of the inner side of the dust remover (41), a vent hole (41i) is arranged in the middle of the second clapboard (41h), and one end of the vent hole (41i) positioned in the second dust removal chamber (41c) is lower than one end of the vent hole positioned in the third dust removal chamber (41 d).

8. A fly ash treatment system as set forth in claim 7 wherein: the fly ash storage cylinder (11) on set up a charge level indicator every certain height, the charge level indicator be connected with controlling means (6), the charge level indicator is used for monitoring fly ash height in the fly ash storage cylinder (11).