CN118204356A

CN118204356A - Device and method for circularly treating waste incineration fly ash

Info

Publication number: CN118204356A
Application number: CN202410625851.9A
Authority: CN
Inventors: 翁林钢; 刘羽洁; 施秦峰; 朱跃; 诸葛敬涛; 毛益萍; 赵明; 柳晓飞
Original assignee: Zhejiang Doway Advanced Technology Co ltd
Current assignee: Zhejiang Doway Advanced Technology Co ltd
Priority date: 2024-05-20
Filing date: 2024-05-20
Publication date: 2024-06-18
Anticipated expiration: 2044-05-20
Also published as: CN118204356B

Abstract

The application relates to the technical field of waste incineration fly ash treatment, and solves the problems of high fly ash treatment cost, complex process and large capacity pressure of a landfill site caused by fly ash solidification in the prior art.

Description

Device and method for circularly treating waste incineration fly ash

Technical Field

The application relates to the technical field of waste incineration fly ash treatment, in particular to a waste incineration fly ash circulating treatment device and method.

Background

The urban household garbage production is increased year by year, the incineration becomes a main mode of garbage harmless treatment, and the problems of huge fly ash discharge and rapid increase are also brought.

When activated carbon powder is used for dust removal in garbage incineration, the concentration of dioxin in the incineration exhaust is reduced by 54% compared with the concentration of dioxin in the case of no activated carbon, which indicates that a large amount of dioxin is transferred into fly ash. Therefore, with the strict implementation of the atmospheric emission standard, dioxins generated by garbage incineration mainly enter the fly ash, so that the pollution control of the fly ash is more important. Dioxin has durability and lipophilicity, is not easy to decompose under natural conditions, can be accumulated in organisms and is gradually amplified through a food chain, so that the dioxin mainly enters a human body through eating dioxin-polluted food.

According to different garbage components, the current treatment method for the garbage incineration fly ash generally adopted at home and abroad comprises the following steps: ① Is properly treated and is buried according to dangerous wastes. However, the treatment cost is high, and ② is used for curing and stabilizing. Mainly comprises cement solidification, asphalt solidification, melt solidification, chemical agent solidification stabilization and the like. The solidified fly ash can be disposed of as normal waste landfills if meeting the requirements of leaching toxicity standards. The method has the main effects that heavy metals and pollution components thereof in the fly ash are chemically inert or contained so as to be convenient to transport and treat, the toxicity of pollutants and the mobility of the pollutants to an ecological ring can be reduced, but the amount of the solidified fly ash is continuously increased along with the time, which causes great challenges to the capacity of a landfill, and ③ separates the heavy metals from the fly ash and respectively carries out resource treatment, such as acid extraction, alkali extraction, biological extraction and the like, but the treatment process is complex and the cost is higher.

Disclosure of Invention

The application aims to solve the problems of high fly ash treatment cost, complex process and large capacity pressure of a landfill caused by fly ash solidification in the prior art, and provides a device and a method for circularly treating waste incineration fly ash.

In a first aspect, a device for recycling waste incineration fly ash is provided, comprising: the device comprises a reactor, wherein an ash inlet is formed in one side, close to the lower end, of the reactor, and an air inlet for connecting an ozone source is formed in the lower end of the reactor; the upper end of the reactor is communicated with the cyclone separator through a first conveying channel, the upper end of the cyclone separator is provided with an exhaust port, and the lower end of the cyclone separator is provided with an ash discharge port; the input end of the circulating ash bin is communicated with the ash discharge port, the output end of the circulating ash bin is communicated with the reactor through a second conveying channel, a weighing sensor is arranged at the bottom of the circulating ash bin, and an electric control valve is arranged in the second conveying channel; the heating device is used for controlling the temperature of the fly ash entering the reactor from the ash inlet to be 100-130 ℃; and the weighing sensor, the cyclone separator, the electric control valve, the heating device and the first temperature sensor are electrically connected with the PLC.

In some possible implementations, the ozone source includes a pulse plasma device and a fan, an output end of the fan is connected with an input end of the pulse plasma device through a conduit, an output end of the pulse plasma device is connected with an air inlet through a conduit, an ozone concentration detection device is installed at an output end of the pulse plasma device, the ozone concentration detection device, the fan and the pulse plasma device are electrically connected with a PLC controller, air can be input into the pulse plasma device through the fan, ozone generated by the air under the ionization effect of the pulse plasma is sent into the reactor from the bottom of the reactor to be mixed with fly ash, ozone concentration in ozone wind output by the pulse plasma device can be detected by the ozone concentration detection device, visualization of the ozone concentration is facilitated, and adjustment of the ozone concentration according to requirements is facilitated.

In some possible implementations, the ozone source further includes a cooling dryer, an output end of the cooling dryer is also connected with an input end of the pulse plasma equipment through a conduit, the cooling dryer is electrically connected with a PLC controller, the PLC controller is electrically connected with a second temperature sensor for detecting an ambient temperature where the fan is located, when the external ambient temperature is higher than 25 ℃ by setting the cooling dryer, at this time, the temperature of ozone air is also higher than 25 ℃, and part of cold air can be input into the pulse plasma equipment by controlling the cooling dryer to work, so that the temperature of the ozone air prepared by the pulse plasma equipment is reduced.

In some possible implementations, a flow rate sensor is installed in the reactor, and the flow rate sensor is electrically connected with the PLC controller, and can detect the flow rate of the mixture of ozone wind and fly ash in the reactor through the flow rate sensor, so as to accurately control the flow rate in the reactor.

In some possible implementations, the flow rate in the reactor is 3-6m/s, and the ratio of the ozone wind output by the air inlet to the fly ash output by the ash inlet is 1:2-1:5, the flow rate in the reactor is 3-6m/s, so that the fly ash in the reactor can reach a turbulent flow state to form a fluid-like motion state, the mixing and the transmission of the ozone air and the fly ash are facilitated, the uniformity and the high efficiency of the reaction process are improved, meanwhile, the reactor also has good heat transfer characteristics, the temperature distribution in the reactor is more uniform, the dioxin reaction efficiency is improved, and the ratio of the ozone air to the fly ash in the reactor is 1:2-1: and 5, when the ozone wind enters the reactor, fly ash particles can move in the fluid along with the movement of the wind and separate from each other and move in all directions in the turbulent layer, so that the ozone wind and the fly ash in the reactor are mixed more uniformly, and the dioxin reaction efficiency is further improved.

In some possible implementations, the exhaust port is connected to an input end of a bag-type dust collector through a third conveying channel, where the bag-type dust collector may be a bag-type dust collector in a garbage incineration system, and the air exhausted from the air separator is dedusted by the bag-type dust collector and then discharged, so that pollution to surrounding environment is reduced.

In some possible implementations, a check valve is installed in the middle of the second conveying channel, wherein the fly ash in the circulating ash bin can enter the reactor along the second conveying channel through the check valve for re-reaction under the action of wind, and the check valve can prevent the fly ash and gas in the reactor from entering the circulating ash bin along the second conveying channel.

In some possible implementation manners, the shell of the reactor and the cyclone separator, and the walls of the first conveying channel and the second conveying channel are provided with heat insulation capacity, so that the reactor, the cyclone separator, the first conveying channel and the second conveying channel are provided with certain heat insulation capacity, loss of internal temperature is reduced, an energy-saving effect can be achieved, the reactor is kept within a range of 100-130 ℃ all the time, and the reaction efficiency is improved.

In some possible implementation modes, the reactor upper end is provided with the sampling mouth, just install detachable apron on the sampling mouth, reactor internal fixation has detachable filter screen, wherein, the filter screen is located between inlet and the air inlet, can be convenient for take a sample to the flying ash in the reactor after opening the apron through setting up the sampling mouth, conveniently can snatch flying ash and detect wherein dioxin content data in the device debugging process, can prevent through setting up the filter screen that flying ash from piling up and causing the jam to the air inlet at the air inlet, secondly, the filter screen can keep apart a region that does not have flying ash in the bottom of reactor for the ozone wind can be continuously upwards blown again after entering the reactor from the air inlet, thereby make the more even of the upward blowing of ozone wind, rather than just concentrate on the region directly over the air inlet, thereby can improve the mixing degree of flying ash and ozone wind, be favorable to improving reaction efficiency.

In a second aspect, there is provided a method for recycling waste incineration fly ash, comprising the waste incineration fly ash recycling device according to the first aspect, the method comprising:

Feeding fly ash to be treated into the reactor from an ash inlet, controlling a fan, pulse plasma equipment and a cyclone separator to work at the same time, and feeding ozone wind generated by the pulse plasma equipment into the reactor from an air inlet so as to mix and react the fly ash and the ozone wind in the reactor;

Judging whether the temperature of the fly ash fed into the reactor from the ash inlet is within the range of 100-130 ℃ according to the detection data of the first temperature sensor, if the temperature of the fly ash is lower than 100 ℃, starting the heating device to heat the fly ash, if the temperature of the fly ash is within the range of 100-130 ℃, not starting or closing the heating device, and if the temperature of the fly ash is higher than 130 ℃, sending an alarm signal;

Judging whether the ambient temperature of the fan is higher than 25 ℃ according to the detection data of the second temperature sensor, if the ambient temperature of the fan is higher than 25 ℃, starting a cold dryer to send cold air into the pulse plasma equipment to reduce the temperature of ozone air, and if the ambient temperature of the fan is lower than or equal to 25 ℃, not starting or closing the cold dryer;

Judging whether the flow rate in the reactor is 3-6m/s according to the detection data of the flow rate sensor, if the flow rate is smaller than 3m/s, gradually increasing the power of the fan until the flow rate is within the range of 3-6m/s, and if the flow rate is larger than 3m/s, gradually decreasing the power of the fan until the flow rate is within the range of 3-6 m/s;

Under the action of centrifugal force and inertia force, the gas in the cyclone separator flows upwards to be discharged from the exhaust port and enters the bag-type dust remover for dust removal treatment, and the ash in the cyclone separator flows downwards to enter the circulating ash bin;

Judging whether the ash amount in the circulating ash bin reaches a preset ash amount threshold according to the detection data of the weighing sensor, and opening an electric control valve if the ash amount reaches the preset ash amount threshold so that the fly ash in the circulating ash bin is blown into the reactor under the action of wind power to be mixed with ozone air again.

The application has the following beneficial effects: in the application, the fly ash enters from the bottom side of the reactor, the temperature of the fly ash is controlled to be 100-130 ℃, the ozone wind enters from the bottom of the reactor, the temperature is controlled to be below 25 ℃, when the cold ozone wind encounters hot fly ash, ozone starts to decompose to generate strong oxidizing substances, such as hydroxyl free radicals, oxygen free radicals and the like, and the strong oxidizing substances and dioxin in the fly ash undergo oxidation reaction, so that the dioxin in the fly ash is removed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a garbage incineration fly ash recycling device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of gas and ash paths in a waste incineration fly ash recycling treatment device according to an embodiment of the present application;

FIG. 3 is a connection block diagram of a PLC controller in the waste incineration fly ash recycling device according to the embodiment of the application;

FIG. 4 is a cross-sectional view of a circulating ash silo in a waste incineration fly ash circulating treatment device according to an embodiment of the present application;

fig. 5 is a flowchart of a method for recycling waste incineration fly ash according to an embodiment of the present application.

Reference numerals:

1. a reactor; 2. an ash inlet; 3. an air inlet; 4. an ozone source; 41. a pulsed plasma device; 42. a blower; 43. an ozone concentration detecting device; 44. a cold dryer; 5. a cyclone separator; 6. an exhaust port; 7. an ash discharge port; 8. a first conveying path; 9. a circulating ash bin; 10. a second conveying path; 11. a weighing sensor; 12. an electric control valve; 13. a heating device; 14. a first temperature sensor; 15. a PLC controller; 16. a second temperature sensor; 17. a flow rate sensor; 18. a bag-type dust collector; 19. a non-return valve; 20. a sampling port; 21. a cover plate; 22. a filter screen; 23. and a tray.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application; it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the protection scope of the present application.

In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1-2, a circulating treatment device for waste incineration fly ash according to embodiment 1 of the present application includes: the reactor 1, reactor 1 one side is fixed with into ash mouth 2, enter ash mouth 2 and connect garbage incinerator's sack cleaner 18, accessible air-blower 42 etc. power equipment is with the fly ash in the sack cleaner 18 from entering ash mouth 2 drum into reactor 1, one side of reactor 1 upper end is connected with cyclone 5 through first conveying channel 8, cyclone 5 upper end is equipped with gas vent 6, cyclone 5 lower extreme is equipped with ash discharge mouth 7, ash discharge mouth 7 lower extreme is connected and is used for collecting the circulating ash feed bin 9 of fly ash, the output of circulating ash feed bin 9 communicates with reactor 1 through second conveying channel 10, second conveying channel 10 mid-mounting has the automatically controlled valve 12 of control second conveying channel 10 break-make, weighing sensor 11 is installed to circulating ash feed bin 9 bottom, for example: as shown in fig. 4, a tray is installed at the bottom of the circulating ash bin 9 for storing ash, in order to prevent the ash from entering under the tray along the gap between the tray and the inner wall of the circulating ash bin 9, the gap between the tray and the inner wall of the circulating ash bin 9 needs to be sealed, a weighing sensor 11 is arranged between the tray and the bottom of the circulating ash bin 9, and the weight of the fly ash in the circulating ash bin 9 can be detected by using the weighing sensor 11, so that when the collection of the fly ash in the circulating ash bin 9 reaches a preset threshold value, an electric control valve 12 is opened to send the fly ash into the reactor 1 along a second conveying channel 10 under the action of wind to continue to react with ozone wind.

In order to obtain the temperature information of the fly ash entering the reactor 1 from the ash inlet 2, a first temperature sensor 14 is installed at the ash inlet 2, wherein, in order to make the measurement data more accurate, the first temperature sensor 14 is installed on the inner wall of the ash inlet 2 or embedded on the wall of the ash inlet 2, so as to ensure that the probe of the first temperature sensor 14 can directly contact with the fly ash, thereby more accurately detecting the temperature of the fly ash, secondly, in order to avoid the temperature of the fly ash entering the reactor 1 to be lower than 100 ℃, a heating device 13 is also installed at the ash inlet 2, when the temperature of the fly ash entering the ash inlet 2 is lower than 100 ℃, the heating device 13 works to heat the fly ash, wherein, the heating device 13 can be an electric heating wire, an electric heating plate, an electric heating rod, and the like, and the electric heating wire can be arranged inside the ash inlet 2, so as to make the probe directly contact with the fly ash, and provide heat transfer efficiency, the electric heating wire can of course, the electric heating wire can be arranged on the outer wall of the ash inlet 2, for example, the electric heating wire is wound on the outer wall of the ash inlet 2, the electric heating wire can be added on the outer wall of the ash inlet 2, and the heat insulating layer can be added for the safety of course, and the heat insulation layer can be further added for the safety of the outer layer.

In a further embodiment, a flow rate sensor 17 is installed in the reactor 1, and the flow rate of the mixture of ozone wind and fly ash in the reactor 1 can be detected by the flow rate sensor 17 so as to accurately control the flow rate in the reactor 1.

As shown in fig. 1, the lower end of the reactor 1 is provided with an air inlet 3, the air inlet 3 is connected with an ozone source 4 for preparing ozone air, which consists of a pulse plasma device 41, a fan 42 and a cold dryer 44, the output end of the fan 42 is connected with the input end of the pulse plasma device 41 through a conduit, the output end of the pulse plasma device 41 is connected with the air inlet 3 through a conduit, an ozone concentration detection device 43 is installed at the output end of the pulse plasma device 41, and the output end of the cold dryer 44 is also connected with the input end of the pulse plasma device 41 through a conduit.

In the above embodiment, air can be input into the pulse plasma equipment 41 through the blower 42, ozone generated by the ionization of the pulse plasma is sent into the reactor 1 from the bottom of the reactor 1 to be mixed with fly ash, the ozone concentration in the ozone wind output by the pulse plasma equipment 41 can be detected by the ozone concentration detection device 43, the ozone concentration can be easily visualized, the ozone concentration can be conveniently adjusted according to the requirement, and part of cold air can be input into the pulse plasma equipment 41 through the operation of the control dryer 44, so that the temperature of the ozone wind produced by the pulse plasma equipment 41 is reduced.

In order to prevent particulate matters such as fly ash in the gas discharged from the gas outlet 6 of the cyclone separator 5, the gas outlet 6 is connected with the input end of the bag-type dust remover 18 through a third conveying channel, wherein the bag-type dust remover 18 can be the bag-type dust remover 18 in a garbage incineration system, and the gas discharged from the cyclone separator 5 is removed by the bag-type dust remover 18 and then discharged, so that the particulate matters reduce pollution to the surrounding environment.

In order to prevent fly ash and ozone wind in the reactor 1 from entering the circulating ash bin 9 from the second conveying channel 10, a check valve 19 is arranged in the middle of the second conveying channel 10, wherein the fly ash in the circulating ash bin 9 can enter the reactor 1 through the check valve 19 to react again under the action of wind along the second conveying channel 10, and the check valve 19 can prevent the fly ash and gas in the reactor 1 from entering the circulating ash bin 9 along the second conveying channel 10, so that the wind in the reactor 1 is prevented from reversely blowing the circulating ash bin 9 into the cyclone 5.

In order to reduce the heat loss inside the device, the reactor 1, the housing of the cyclone 5 and the walls of the first and second transfer channels 8, 10 are provided with heat insulating capabilities, for example: the shell of the reactor 1 and the cyclone 5 and the walls of the first conveying channel 8 and the second conveying channel 10 are prepared by adopting materials with heat insulation function, or a heat insulation layer is wrapped outside the shell of the reactor 1 and the cyclone 5 and the walls of the first conveying channel 8 and the second conveying channel 10, and the heat insulation layer can be: the heat insulation plates such as glass fiber, asbestos and rock wool enable the reactor 1, the cyclone separator 5, the first conveying channel 8 and the second conveying channel 10 to have certain heat insulation capacity, so that loss of internal temperature is reduced, an energy-saving effect can be achieved, the temperature in the reactor 1 can be kept within a range of 100-130 ℃ all the time, and the reaction efficiency is improved.

In order to be convenient for sample the flying ash in the reactor 1, the sampling mouth 20 has been reserved to 1 upper end of reactor, and install detachable apron 21 on the sampling mouth 20, wherein, apron 21 can be through the detachable fixing in sampling mouth 20 top of joint or screw fixation's mode, 1 internal fixation of reactor has detachable filter screen 22, wherein, filter screen 22 is located between inlet 2 and air inlet 3, separate inlet 2 and air inlet 3 promptly through filter screen 22, can be convenient for sample the flying ash in the reactor 1 after opening the apron 21 through setting up sampling mouth 20, the convenience can snatch flying ash and detect wherein dioxin content data in the device debugging process, can prevent to pile up at air inlet 3 through setting up filter screen 22 and cause the jam to air inlet 3, secondly, filter screen 22 can keep apart a region that does not have the flying ash in the bottom of reactor 1, make ozone wind can be full of this region after this region fast, thereby make the ozone wind blow upwards more even, and not just concentrate on the region directly over air inlet 3, thereby can improve the efficiency of mixing with ozone wind, and the uniformity is favorable to improving the reaction efficiency.

In this embodiment, as shown in fig. 3, the weighing sensor 11, the cyclone separator 5, the electric control valve 12, the heating device 13, the first temperature sensor 14, the ozone concentration detecting device 43, the fan 42, the pulse plasma device 41, the chiller dryer 44, the second temperature sensor 16 and the flow rate sensor 17 are all electrically connected with the PLC controller 15, and these devices are all controlled by the PLC controller 15, where the weighing sensor 11 is used to detect the weight of the ash in the circulating ash bin 9, the first temperature sensor 14 is used to detect the temperature information of the ash in the ash inlet 2, the ozone concentration detecting device 43 is used to detect the concentration information of the ozone in the ozone wind outputted from the output end of the pulse plasma device 41, the second temperature sensor 16 is used to detect the temperature information of the environment where the fan 42 is located, and the flow rate sensor 17 is used to detect the flow rate information in the reactor 1, and by matching with the automatic control function of the PLC controller 15, the automatic control of the whole ash circulating process can be realized, the labor cost is reduced, and the labor cost is liberated.

It should be noted that, in this embodiment, by controlling the speed and direction of the ozone wind passing through the solid particle layer, the solid particles reach a turbulent flow state to form a fluid-like motion state, specifically, the fly ash is blown into the reactor 1 in the horizontal direction, the ozone wind contacts and collides with the fly ash in the vertical upward direction, the flow rate in the reactor 1 is 3-6m/s, and the ratio of the ozone wind output from the air inlet 3 to the fly ash output from the ash inlet 2 is 1:2-1:5, under this state, the space between the solid particles increases, and area of contact increases to be favorable to the homogeneity and the high efficiency of reaction materials's mixing, transmission and reaction process, simultaneously, still have good heat transfer characteristic, make the temperature distribution in the reaction layer more even, improved reaction efficiency, ozone wind and fly ash's proportion in the reactor 1 is 1:2-1:5 (i.e., 1:2 to 1:5), when ozone wind enters the reactor 1, fly ash particles move in the fluid along with the flow of the wind and move in all directions in the turbulent layer, thereby further improving the reaction efficiency.

The ozone gas was reacted with dioxin in the reactor 1 to be divided into two parts: ozone reacts directly with dioxin, which is a substance with strong oxidizing property and can react with various organic compounds to oxidatively decompose the substance into substances with lower toxicity or no toxicity, during the process of removing the dioxin, ozone can attack specific chemical bonds in dioxin molecules, especially those parts which are weaker or easily oxidized, and the strong oxidizing effect of the ozone can enable the ozone to break the chemical bonds in the dioxin molecules so as to decompose the dioxin, and various intermediate products can be generated during the decomposition process, and the intermediate products react with ozone or other free radicals to finally be converted into harmless substances such as carbon dioxide and water; the ozone is decomposed at high temperature to generate free radicals with stronger oxidability, the hydroxyl free radicals and dioxin molecules are subjected to addition reaction to generate a transition state to form a compound of the hydroxyl free radicals and the dioxin molecules, the hydroxyl free radicals in the compound and the dioxin molecules are subjected to oxidation reaction to oxidize hydrocarbon bonds in the dioxin molecules into hydroxyl groups to generate a hydroxyl free radical and an oxo-dioxin molecule, and the intermediate products are further reacted with the free radicals to finally generate carbon dioxide and water, so that the purpose of removing dioxin can be achieved.

Meanwhile, the decomposition speed of ozone at high temperature is increased, because the ozone molecules are more active at high temperature, and the decomposition reaction is easier to occur. Thus, in a high temperature environment, the half-life of ozone is correspondingly shortened. Ozone half-life was 1min at 100 ℃. The temperature of the fly ash is between 100 ℃ and 130 ℃ and is higher than 100 ℃, so that the half life of ozone in the reactor 1 is less than 1min, no ozone overflows at the exhaust port 6, and the problem of secondary pollution of ozone is solved.

Example 2

As shown in fig. 5, the treatment method of the refuse incineration fly ash recycling apparatus in the above-mentioned embodiment 1 includes:

S10, conveying fly ash to be treated into the reactor 1 from an ash inlet 2, controlling a fan 42, a pulse plasma device 41 and a cyclone separator 5 to work at the same time, and conveying ozone wind generated by the pulse plasma device 41 into the reactor 1 from an air inlet 3 so as to mix and react the fly ash and the ozone wind in the reactor 1;

S20, judging whether the temperature of the fly ash fed into the reactor 1 from the ash inlet 2 is within the range of 100-130 ℃ according to the detection data of the first temperature sensor 14, if the temperature of the fly ash is lower than 100 ℃, starting the heating device 13 to heat the fly ash, if the temperature of the fly ash is within the range of 100-130 ℃, not starting or closing the heating device 13, and if the temperature of the fly ash is higher than 130 ℃, sending an alarm signal;

It should be noted that, the decomposition rate of ozone at high temperature is increased, because ozone molecules are more active at high temperature and decomposition reaction is more likely to occur, and thus, the half-life of ozone is correspondingly shortened in high temperature environment. The half-life period of ozone is 1min at 100 ℃, the temperature of fly ash is between 100 and 130 ℃ and is more than 100 ℃, so that the half-life period of ozone in the reactor 1 is less than 1min, no ozone overflows from a flue gas outlet, and the problem of secondary pollution of ozone is solved.

S30, judging whether the ambient temperature of the fan 42 is higher than 25 ℃ according to the detection data of the second temperature sensor 16, if the ambient temperature of the fan 42 is higher than 25 ℃, starting the cold dryer 44 to send cold air into the pulse plasma equipment 41 to reduce the temperature of ozone air, and if the ambient temperature of the fan 42 is lower than or equal to 25 ℃, not starting or closing the cold dryer 44;

It should be noted that, since the fan 42 directly sends the air in the environment where the fan 42 is located into the pulse plasma device 41 to ionize and generate the ozone wind, the temperature of the ozone wind is close to the air in the environment where the fan 42 is located, and in general, the temperature of the ozone wind needs to be controlled to be 25 ℃ or below, if the temperature of the ozone wind at the output end of the pulse plasma device 41 is directly detected, although more accurate temperature information of the ozone wind can be obtained, when the temperature of the environment where the fan 42 is located is higher than 25 ℃, for example: the temperature of the environment where the fan 42 is located is 40 ℃, the ozone air at the output end of the pulse plasma device 41 will be higher than 25 ℃ and reach the vicinity of 40 ℃, the cold dryer 44 is started, the ozone air at the output end of the pulse plasma device 41 will be lower than 25 ℃ quickly, if the cold dryer 44 is controlled to work according to the detected temperature at the output end of the pulse plasma device 41 at this time, the cold dryer 44 needs to be closed when the temperature is lower than 25 ℃ just after the cold dryer 44 works for a while, but the ozone air temperature at the output end of the pulse plasma device 41 is higher than 25 ℃ after the cold dryer 44 is closed for a while, so that the cold dryer 44 needs to be frequently opened Guan Leng, and in the embodiment, the problem that the cold dryer 44 is frequently opened Guan Leng can be effectively solved by controlling whether the cold dryer 44 works according to the temperature of the environment where the fan 42 is located.

S40, judging whether the flow rate in the reactor 1 is 3-6m/S according to the detection data of the flow rate sensor 17, if the flow rate is less than 3m/S, gradually increasing the power of the blower 42 and/or the cold dryer 44 until the flow rate is within the range of 3-6m/S, and if the flow rate is greater than 3m/S, gradually decreasing the power of the blower 42 and/or the cold dryer 44 until the flow rate is within the range of 3-6 m/S;

it should be noted that, the fly ash is blown into the reactor 1 along the horizontal direction, and the ozone wind contacts and collides with the fly ash along the vertical upward direction, so that the solid particles reach a turbulent flow state by controlling the speed and direction of the ozone wind passing through the solid particle layer, and a fluid-like motion state is formed, in this state, the gaps between the solid particles are increased, and the contact area is increased, thereby being beneficial to the uniformity and the high efficiency of the mixing, the transferring and the reaction process of the reaction materials, and simultaneously, having good heat transfer characteristics, so that the temperature distribution in the reaction layer is more uniform, and the reaction efficiency is improved.

S50, under the action of centrifugal force and inertia force, the gas in the cyclone separator 5 flows upwards to be discharged from the exhaust port 6 and enters the bag-type dust remover 18 for dust removal treatment and then is discharged, and the ash in the cyclone separator 5 flows downwards to enter the circulating ash bin 9 for collection;

S60, judging whether the ash amount in the circulating ash bin 9 reaches a preset ash amount threshold according to the detection data of the weighing sensor 11, if the ash amount reaches the preset ash amount threshold, opening the electric control valve 12 to enable the fly ash in the circulating ash bin 9 to be blown into the reactor 1 under the action of wind power to be mixed with ozone wind again, and closing the electric control valve 12 to continue ash collection if the ash amount in the circulating ash bin 9 is emptied or reaches a preset low threshold.

The whole device is tightly combined with the garbage incineration flue gas treatment process, when dust in the bag-type dust collector 18 is collected to a certain amount by being used as matched equipment of the bag-type dust collector 18, a corresponding discharger is opened, the dust can be directly conveyed into the reactor 1, meanwhile, cold ozone air is introduced for reaction, and the whole process is continuous and can be controlled and monitored on line.

The above is only a preferred embodiment of the present application; the scope of the application is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present application, and the technical solution and the improvement thereof are all covered by the protection scope of the present application.

Claims

1. A waste incineration fly ash circulation treatment device, characterized by comprising:

The device comprises a reactor, wherein an ash inlet is formed in one side, close to the lower end, of the reactor, and an air inlet for connecting an ozone source is formed in the lower end of the reactor;

The upper end of the reactor is communicated with the cyclone separator through a first conveying channel, the upper end of the cyclone separator is provided with an exhaust port, and the lower end of the cyclone separator is provided with an ash discharge port;

The input end of the circulating ash bin is communicated with the ash discharge port, the output end of the circulating ash bin is communicated with the reactor through a second conveying channel, a weighing sensor is arranged at the bottom of the circulating ash bin, and an electric control valve is arranged in the second conveying channel;

The heating device is used for controlling the temperature of the fly ash entering the reactor from the ash inlet to be 100-130 ℃;

And the weighing sensor, the cyclone separator, the electric control valve, the heating device and the first temperature sensor are electrically connected with the PLC.

2. The waste incineration fly ash circulation treatment device according to claim 1, wherein the ozone source comprises a pulse plasma device and a fan, the output end of the fan is connected with the input end of the pulse plasma device through a conduit, the output end of the pulse plasma device is connected with the air inlet through a conduit, the ozone concentration detection device is installed at the output end of the pulse plasma device, and the ozone concentration detection device, the fan and the pulse plasma device are electrically connected with the PLC.

3. The circulating treatment device for the waste incineration fly ash according to claim 2, wherein the ozone source further comprises a cold dryer, the output end of the cold dryer is also connected with the input end of the pulse plasma equipment through a conduit, the cold dryer is electrically connected with a PLC controller, and the PLC controller is electrically connected with a second temperature sensor for detecting the environmental temperature of the fan.

4. The waste incineration fly ash circulation treatment device according to claim 3, wherein a flow rate sensor is installed in the reactor, and the flow rate sensor is electrically connected with the PLC.

5. The circulating treatment device for waste incineration fly ash according to claim 4, wherein the flow rate in the reactor is 3-6m/s, and the ratio of the ozone wind output by the air inlet to the fly ash output by the ash inlet is 1:2-1:5.

6. The circulating treatment device for waste incineration fly ash according to claim 1, wherein the exhaust port is connected with the input end of the bag-type dust collector through a third conveying channel.

7. The waste incineration fly ash circulation treatment device according to claim 1 or 5, wherein a non-return valve is installed in the middle of the second conveying channel.

8. The apparatus according to claim 1, wherein the reactor, the cyclone housing, and the walls of the first and second conveyance paths each have heat insulating capability.

9. The device for recycling the waste incineration fly ash according to claim 1, wherein a sampling port is arranged at the upper end of the reactor, a filter screen is arranged on the sampling port and is provided with a detachable cover plate, and a detachable filter screen is fixed in the reactor, wherein the filter screen is positioned between the ash inlet and the air inlet.

10. A method for recycling waste incineration fly ash, comprising the waste incineration fly ash recycling device according to claim 5, the method comprising: