CN110542102B - Fly ash treatment system based on garbage classification treatment - Google Patents

Abstract

The invention discloses a fly ash treatment system based on garbage classification treatment, which comprises a smoke exhaust pipeline, wherein the smoke inlet end of the smoke exhaust pipeline is communicated with the top of an incinerator, the smoke exhaust pipeline is sequentially provided with a waste heat collecting pipe section and a fly ash collecting pipe section along the smoke exhaust direction, and at least two sections of fly ash collecting sections are sequentially arranged along the fly ash collecting pipe section; the fly ash collecting pipe section is internally provided with an electrode purification module, the end part of the smoke inlet end of the smoke exhaust pipeline is also provided with a bypass pipeline, and an air outlet of the bypass pipeline is communicated with the front end of the fly ash collecting pipe section. By adopting the scheme, the electrode purification module is arranged on the fly ash collecting pipe section, so that fly ash accumulation detection is realized. When the flying ash is adhered to the smoke exhaust pipeline, the smoke discharged from the incinerator is directly transmitted to the ash collecting pipe section by arranging the bypass pipeline, and the flying ash adhered to the smoke exhaust pipeline is heated by hot gas to fall off and is discharged under the action of strong smoke blowing.

Description

Fly ash treatment system based on garbage classification treatment

Technical Field

The invention relates to the technical field of waste incineration tail gas treatment, in particular to a fly ash treatment system based on waste classification treatment.

Background

At present, the popularization of garbage classification treatment is not realized in China. In the prior art, when a waste incineration power station treats waste, the general flow is as follows: all the garbage is carried to a garbage pool by a garbage truck, and is sent to an incinerator for incineration and power generation after long-time accumulation and fermentation and most of moisture filtration.

In the prior art, the garbage is directly incinerated without being classified, so that the garbage contains recoverable garbage, dry garbage, wet garbage, harmful garbage and the like. In the incinerated fly ash, the components are complex and the toxic and harmful components are high. And most of the fly ash particles have a particle size of 1-100 μm, and the fly ash is collected and treated by an electrostatic dust collector, a bag-type dust collector and a wet dust collector.

However, in the garbage incineration power plant, most of the garbage used for the garbage incineration treatment after the garbage classification treatment is dry garbage (i.e., waste, such as tile ceramics, waste soil, waste paper in a toilet, paper towels, and the like, fruit shells, dust, food bags, and the like, which are difficult to be recovered). In the process of burning dry garbage, because the content of toilet paper is high, the fly ash contains a large amount of paper dust, compared with the existing fly ash, the fly ash particles after classification treatment are more and are easy to adhere, and the particle size is larger and more; and the particles are light and not easy to handle. However, in dry garbage, there is often a portion of water, which is evaporated by combustion and carried along with the paper dust and fly ash to be discharged along with the flue. In the discharging process, after the multi-stage heat exchange cooling, the water vapor and the paper dust fly ash are adhered and are attached to the flue, so that the flue cannot be cleaned and blocked. And in dry rubbish, still include a large amount of low grade plastics, burn the back, produce a large amount of toxic gases, toxic gases are when discharging along with vapor, paper ash flying dust, are adsorbed and the adhesion at the flue inner wall by the paper ash, lead to when carrying out real-time detection and processing to tail gas, although discharged tail gas has already accorded with the emission regulation, in the real-time detection process, the detection index still remains high, leads to detecting system to make mistakes, can't reach and discharge and become accurate.

Based on the above special defects, a research team needs to provide a garbage flying dust and tail gas treatment system based on garbage classification treatment to overcome the defects of classification combustion treatment.

Disclosure of Invention

In order to solve the problems, the invention provides a fly ash treatment system based on garbage classification treatment, wherein an electrode purification module is arranged on a fly ash collecting pipe section to realize fly ash accumulation detection. When the fly ash is adhered to the smoke exhaust pipeline, the smoke discharged from the incinerator is directly transmitted to the fly ash collecting pipe section by arranging the bypass pipeline, and the fly ash adhered to the smoke exhaust pipeline is heated by hot gas to fall off, and is discharged under the action of strong smoke blowing.

In order to achieve the purpose, the invention adopts the following specific technical scheme:

the utility model provides a flying dust processing system based on refuse classification handles, includes smoke exhaust pipe, this smoke exhaust pipe advance the cigarette end with burn burning furnace top intercommunication, this smoke exhaust pipe sets gradually to waste heat collection pipeline section and flying dust collection pipeline section along the direction of discharging fume, its key technology lies in: at least two sections of fly ash collecting sections are sequentially arranged along the fly ash collecting pipe section; the fly ash collecting section comprises a fly ash decelerating section and a fly ash gathering and recovering section, and an electrode purifying module is arranged in the fly ash collecting pipe section and is used for performing deceleration control on fly ash in a flue in the fly ash decelerating section and gathering and recovering the fly ash passing through the fly ash gathering and recovering section;

the end part of the smoke inlet end of the smoke exhaust pipeline is also provided with a bypass pipeline, the air outlet of the bypass pipeline is communicated with the front end of the fly ash collecting pipe section, and the bypass pipeline is used for directly transmitting the smoke discharged by the incinerator to the fly ash collecting pipe section and heating the fly ash adhered to the smoke exhaust pipeline to enable the fly ash to fall off.

By adopting the scheme, the electrode purification module is arranged on the fly ash collecting pipe section, so that fly ash accumulation detection is realized. When the fly ash is adhered to the smoke exhaust pipeline, the smoke discharged from the incinerator is directly transmitted to the fly ash collecting pipe section by arranging the bypass pipeline, and the fly ash adhered to the smoke exhaust pipeline is heated by hot gas to fall off, and is discharged under the action of strong smoke blowing.

Further described, the electrode purification module comprises two sets of electrode groups and a pair of electrode plates; the two groups of electrode groups are arranged on the inner wall of the smoke exhaust pipeline where the fly ash collecting pipe section is located, each group of electrode group is provided with N electrodes, the electrodes of the two groups of electrode groups are alternately arranged, two adjacent electrodes are parallel to each other and have equal distance, the plane where each electrode is located is vertical to the extension direction of the smoke exhaust pipeline, and each group of electrode groups is correspondingly connected with one phase of power supply;

the pair of electrode plates are arranged on the outer wall of the smoke exhaust pipeline where the fly ash collecting pipe section is located, and the direction of an electric field generated by the pair of electrode plates is parallel to the gravity direction of the smoke exhaust pipeline. The electrode is arranged on the inner wall of the smoke exhaust pipeline, when the fly ash adhered to the inner wall of the smoke exhaust pipeline is different, the resistance of the electrode can be changed accordingly, under the power supply of the same voltage power supply, the real-time current of the electrode is detected, and the real-time current is compared with the current of the electrode when the inner wall of the smoke exhaust pipeline is in a clean state, so that whether the fly ash is adhered to the electrode or not can be judged, and whether the inner wall of the smoke exhaust pipeline is clean or. Meanwhile, the N parallel electrodes with equal distance are arranged on the inner wall of the smoke exhaust pipeline, so that an even electric field is formed in the smoke exhaust pipeline, and the direction of the electric field faces to the same direction. Because the fly ash is a tiny particle, under the action of an electric field, the fly ash is subjected to a force along one direction after being subjected to induction charging. In order to achieve the purpose of reducing the speed of the fly ash, after the electric field is applied, the acting force of the electric field on the fly ash is opposite to the exhaust direction of the flue gas.

And the two electrode plates are combined and arranged at the two sides of the smoke exhaust pipeline, the direction of an electric field of the two electrode plates is parallel to the gravity action line of the pipeline, the flying dust particles are driven to move downwards under the action of the electric field generated by the two electrode plates, and the distance and time for the flying dust particles to fall to the bottom of the pipeline can be shortened under the action of deceleration and downward acting force. Wherein, the cross section of the electrode plate is arc-shaped and clings to the upper and lower outer walls of the smoke exhaust pipeline.

The further technical scheme is as follows: the pipe wall at the bottom of the smoke exhaust pipeline, where the fly ash gathering and recovering section is located, gradually expands from the front end to the rear end along the radial direction to form a diversion trench, a fly ash collecting port is formed in the smoke exhaust pipeline, where the tail end of the diversion trench is located, and a fly ash collecting device is installed at the fly ash collecting port;

the inner wall of the smoke exhaust pipeline at the fly ash collecting port is also provided with a fly ash filter screen, the windward surface of the fly ash filter screen faces the fly ash deceleration section, the fly ash filter screen is fixed on a reverse purging branch pipe, the air outlet of the reverse purging branch pipe is embedded on the leeward surface of the fly ash filter screen, and the reverse purging branch pipe is communicated with the bypass pipeline.

By adopting the scheme, the fly ash is slowly gathered at the lower part of the flue under the action of the two electric fields, and moves along the diversion trench under the action of the flue gas, so as to fall into the fly ash collecting device. And in order to further isolate the fly ash, a fly ash filter screen is arranged on the inner wall of the smoke exhaust pipeline at the fly ash collecting opening, so that the fly ash is further isolated. The fly ash blocked on the fly ash filter screen falls into the fly ash collecting port under the action of the electric field and the gravity, and is collected by the fly ash collecting device. In order to prevent the fly ash filter screen from being completely blocked, the fly ash filter screen is fixed on the back-blowing branch pipe, and after the fly ash filter screen is used for a period of time, the back-blowing branch pipe is added with a back-blowing scavenging body to realize back-blowing and back-blowing, and accumulated ash accumulated on the fly ash filter screen is emptied. The diversion trench gradually inclines downwards from nothing to nothing, and the inclination angle can be set according to the length of the flue and the flue gas discharge speed.

The fly ash collecting device comprises a shell and an ash hopper arranged at the lower part of the shell, wherein an ash receiving port is formed at the upper part of the shell and is opposite to the fly ash collecting port; a roller is arranged in the shell and is opposite to the ash receiving port; the roller comprises a hollow cylindrical roller bracket and a roller shell covering the outside of the roller bracket, and the roller bracket is connected with a roller driving motor through a roller driving rod; the roller support is internally provided with an electrode cavity, a support frame penetrates through the electrode cavity, the roller rotates relative to the support frame, an electrostatic generator is fixedly arranged on the support frame and is arranged right below the ash receiving port, and the direction of an electric field generated by the electrostatic generator is distributed and penetrates through the ash receiving port.

By adopting the scheme, the ash receiving port is opposite to the fly ash collecting port, and the garbage fly ash can just fall on the roller after falling into the ash receiving port from the fly ash collecting port. And the roller rotates in real time to drive the fly ash to fall into the ash bucket. The fly ash is adsorbed at the ash receiving port by combining with the electrostatic generator, and when the fly ash is driven by the roller to rotate away from the ash receiving port, the adsorption acting force disappears, and the fly ash automatically falls down. The electrostatic force of the electrostatic generator can be automatically adjusted by the fly ash purification controller.

Describing still further, the last fly ash collecting section in the fly ash collecting pipe sections is a tail end fly ash collecting section, the rear end of the tail end fly ash collecting section is also provided with a fly ash backflow section, the inner wall of the smoke exhaust pipeline where the fly ash backflow section is located is provided with two groups of reverse electrodes, each group of reverse electrodes is respectively provided with M reverse electrodes, the reverse electrodes of the two groups of reverse electrodes are alternately arranged, two adjacent reverse electrodes are parallel to each other and have equal distance, the plane where each reverse electrode is located is vertical to the extending direction of the smoke exhaust pipeline, and each group of reverse electrodes is correspondingly connected with a reverse power supply; the distance between two adjacent counter electrodes is smaller than the distance between two adjacent electrodes; the reverse supply voltage of the counter electrode is greater than the supply voltage of the electrode; the outer wall of the smoke exhaust pipeline where the fly ash backflow section is located is also provided with a pair of reverse electrode plates, and the direction of an electric field generated by the pair of reverse electrode plates is parallel to the gravity direction of the smoke exhaust pipeline; the pipe wall at the bottom of the smoke exhaust pipe where the fly ash backflow section is located is provided with a backflow groove, the pipe wall where the backflow groove is located gradually expands from the smoke exhaust pipe to the front end from the rear end along the radial direction, and the backflow notch of the backflow groove faces the fly ash collecting opening.

By adopting the scheme, the last section of the fly ash collecting section is set as the tail end fly ash collecting section, M reverse electrodes are arranged in the same way, the M reverse electrodes are closer to each other, the reverse voltage is larger, and the electric field action is larger. The fly ash which has not been removed can be treated in a final stage in a final step. Because most of the remaining fly ash in the last section is micro particles, the fly ash can reversely run under the action of the super large reverse electric field and fall into the fly ash collecting port of the tail end fly ash collecting section along with the backflow groove, so that the fly ash is collected by the fly ash collecting device.

Wherein M, N are all even numbers greater than zero.

The fly ash collecting port is integrally in an inverted frustum shape, a reciprocating purging port is formed in the side wall of the fly ash collecting port and is connected with a purging end of a reciprocating purging main pipe, a reciprocating filter screen is arranged at the reciprocating purging port, and an air outlet of the reciprocating purging main pipe is communicated with the rear end of the fly ash collecting pipe section;

the reciprocating purging main pipe is also provided with a reciprocating purging branch pipe, and one end of the reciprocating purging branch pipe, which is far away from the reciprocating purging main pipe, is communicated with the side wall of the smoke exhaust pipeline, which is far away from the fly ash collecting port;

the reciprocating purging main pipe is provided with an air outlet main valve and a reciprocating purging control valve, the reciprocating purging branch pipe is arranged between the air outlet main valve and the reciprocating purging control valve, and the reciprocating purging branch pipe is provided with an air inlet valve.

By adopting the scheme, the reciprocating purging main pipe is arranged at the fly ash collecting port, and a flue gas channel can be formed by opening the air outlet main valve and the reciprocating purging control valve. Under the action of the flue gas channel, the fly ash can more easily fall into the fly ash collecting port, thereby realizing the fly ash collection. After a flue gas channel is formed for a period of time, the air outlet main valve is controlled to be closed, the air inlet valve is controlled to be opened, flue gas at the front end of the fly ash collecting opening is blown into the fly ash collecting opening from the reciprocating blowing opening through the reciprocating blowing main pipe, and reverse blowing is achieved. Because the gas port at the front end of the collection is collected from the upper part of the smoke exhaust pipeline during the back purging, the fly ash is less at the part, and the cleaning effect on the reciprocating filter screen can be realized during the purging. The reciprocating filter screen has smaller meshes, so that the flowing fly ash is smaller and the smoke gas flow is also smaller. Even when the dust collector is circulated, a large amount of fly ash can not flow out. And the purging time is controlled in real time, and the valve switch is also controlled in real time.

According to a further technical scheme, a bypass main valve and a bypass heating control valve are arranged on the bypass pipeline, a filtering branch pipe is further arranged between the bypass main valve and the bypass heating control valve and connected with the back-flushing main pipe, at least two back-flushing branch pipes are arranged on the back-flushing main pipe, and the back-flushing branch pipes respectively supply air to the fly ash filter screen correspondingly;

the back-blowing control device is characterized in that an air supply pressure pump is further arranged at the front end of the back-blowing branch pipe, and back-blowing control valves are arranged on the back-blowing branch pipes.

By adopting the scheme, the back-flushing branch pipes supply air to all the fly ash filter screens, and reverse flushing and cleaning are realized. And in order to increase the blowing force, an air supply pressure pump is additionally arranged on the back blowing main pipe to increase the back blowing force. And in order to clean the fly ash, a filter branch pipe is arranged between the bypass main valve and the bypass heating control valve to filter the fly ash. And the fly ash purification controller is combined to control the opening and closing of the valve, so that the filter branch pipe can be reversely blown under the action of the air supply pressure pump, and the self-cleaning effect is achieved.

A water cleaning fly ash device is also arranged on the smoke exhaust pipeline at the rear end of the fly ash collecting pipe section, the water cleaning fly ash device comprises a sealed cleaning water tank, a smoke exhaust inlet and a smoke exhaust outlet are formed in the cleaning water tank, the rear end of the fly ash collecting pipe section extends into the water surface of the cleaning water tank through the smoke exhaust inlet, and smoke of the smoke exhaust pipeline is exhausted from the smoke exhaust outlet; the ash residue cleaning device is characterized in that x ash residue drainage covers are vertically arranged in the cleaning water tank, the ash residue drainage covers are integrally conical, the conical bottoms of the ash residue drainage covers face the bottom of the cleaning water tank, and a water outlet pipe is connected to the tops of the ash residue drainage cover covers and is communicated with the inside of the ash residue drainage cover covers; a water inlet pipe and a water outlet main pipe are also arranged in the cleaning water tank, and all the water outlet pipes are communicated with the water outlet main pipe; the bottom of the cleaning water tank is also provided with x air supply heads which are connected with the same air supply pipe, and the x air supply heads are fixedly arranged under the orthographic projection of the x ash drainage covers in a one-to-one correspondence manner.

By adopting the scheme, the water washing fly ash device washes the gas to be discharged for removing the residual fly ash in the gas. Wherein the smoke gas is from the smoke exhaust inlet to the position below the water surface of the cleaning water tank, and the smoke gas floats upwards under the action of buoyancy after being washed and is discharged from the smoke exhaust outlet. After falling into water, the ash falls into the bottom of the cleaning water tank along the ash drainage cover or gradually settles.

Air is fed into the air feeding head, and under the action of the air, the air bubbles carry ash slag to enter the drainage cover along the airflow direction and are discharged along the water outlet main pipe. The ash and slag at the bottom of the cleaning water tank are completely discharged, no sediment is generated, and the flue gas cleaning is realized.

The invention has the beneficial effects that: aiming at the phenomenon that most of combustible garbage in dry garbage is soluble waste paper, the conventional fly ash cleaning system is improved. The fly ash is gathered under the action of an electric field, and the fly ash collection is realized by arranging the fly ash collecting device, so that the discharge of polluted air is prevented. And a water cleaning fly ash device is additionally arranged at the tail part of the flue to clean fine fly ash which is difficult to gather.

Drawings

FIG. 1 is a system block diagram of the present invention;

FIG. 2 is a schematic illustration of a bypass duct hot gas supply;

FIG. 3 is a schematic view of the hot air supply and distribution of the bypass pipeline and the back flushing of the fly ash filter screen;

FIG. 4 is a schematic view of the back flushing of the hot gas fly ash filter screen of the bypass duct;

FIG. 5 is a schematic view of a filter manifold reverse purge

FIG. 6 is an enlarged schematic view of A in FIG. 1;

FIG. 7 is a view of the construction of the drum mounting of the present invention;

FIG. 8 is a schematic view of the installation of a fly ash screen;

fig. 9 is an enlarged schematic view of B in fig. 1.

Detailed Description

The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.

As can be seen from figure 1, a fly ash processing system based on refuse classification handles, includes exhaust pipe 1, this exhaust pipe 1 advance the cigarette end with burn burning furnace 2 top intercommunication, this exhaust pipe 1 sets gradually into waste heat collection pipeline section Y and fly ash collection pipeline section F along the direction of discharging fume, its key technology lies in: two sections of fly ash collecting sections are sequentially arranged along the fly ash collecting pipe section F; the fly ash collecting section comprises a fly ash decelerating section and a fly ash gathering and recovering section, and an electrode purifying module is arranged in the fly ash collecting pipe section F and is used for performing deceleration control on fly ash in a flue in the fly ash decelerating section and gathering and recovering the fly ash passing through the fly ash gathering and recovering section;

the end part of the smoke inlet end of the smoke exhaust pipeline 1 is also provided with a bypass pipeline 3, the air outlet of the bypass pipeline 3 is communicated with the front end of the fly ash collecting pipe section F, and the bypass pipeline 3 is used for directly transmitting the smoke discharged by the incinerator 2 to the fly ash collecting pipe section F to heat the fly ash adhered on the smoke exhaust pipeline 1 and enable the fly ash to fall off.

As can also be seen in conjunction with fig. 1, the electrode purification module includes two sets of electrode sets and a pair of electrode plates J2; the two groups of electrode groups are arranged on the inner wall of the smoke exhaust pipeline 1 where the fly ash collecting pipe section F is located, each group of electrode group is provided with N electrodes J1 respectively, the electrodes of the two groups of electrode groups are arranged alternately, two adjacent electrodes are parallel to each other and have equal distance, the plane where each electrode J1 is located is perpendicular to the extending direction of the smoke exhaust pipeline 1, and each group of electrode group is correspondingly connected with one phase of power supply;

in this example, for illustrative purposes, it can be seen in conjunction with FIG. 1 that the electric fields generated by the two stages of the fly ash collection stage are E1 and E2, respectively.

As can be seen from fig. 1, a pair of the electrode plates J2 is disposed on the outer wall of the smoke exhaust pipe 1 where the fly ash collecting pipe section F is located, and the direction of the electric field generated by the pair of the electrode plates is parallel to the direction of gravity of the smoke exhaust pipe 1.

In this embodiment, the electrode plate has an arc-shaped cross section.

In this embodiment, N is an even number, and the size of N is set according to the length of the smoke exhaust duct 1. In FIG. 1, for illustration, 8 fly ash collecting sections are set, and in actual production, the fly ash collecting sections F of the smoke exhaust pipeline 1 are generally installed at intervals of 10-20cm when the lengths of the fly ash collecting sections F are several meters.

As can also be seen from fig. 1, the bottom pipe wall of the smoke exhaust pipe 1 where the fly ash gathering and recovering section is located gradually expands from the front end to the rear end along the radial direction to form a diversion trench, and the smoke exhaust pipe 1 where the tail end of the diversion trench is located is provided with a fly ash collecting port.

As can be seen from fig. 1 and 2, the fly ash collecting opening is provided with a fly ash collecting device 4; as can be seen from fig. 8 and fig. 1, a fly ash filter screen 5 is further disposed on the inner wall of the smoke exhaust duct 1 at the fly ash collecting port, the windward side of the fly ash filter screen 5 faces the fly ash deceleration section, the fly ash filter screen is fixed on a reverse purging branch pipe, the air outlet of the reverse purging branch pipe is embedded on the leeward side of the fly ash filter screen 5, and the reverse purging branch pipe is communicated with the bypass duct 3.

As can be seen from fig. 1, a bypass main valve 31 and a bypass heating control valve 32 are arranged on the bypass pipeline 3, a filter branch pipe 35 is further arranged between the bypass main valve 31 and the bypass heating control valve 32, the filter branch pipe is connected with the back-blowing main pipe, two back-blowing branch pipes 37 are arranged on the back-blowing main pipe 36, and the back-blowing branch pipes respectively supply air to the fly ash filter screen 5;

the front end of the back blowing branch pipe is also provided with an air supply pressurizing pump 33, and the back blowing branch pipe is provided with a back blowing control valve 34.

As can be seen from fig. 2, when the bypass main valve 31 and the bypass heating control valve 32 are opened, and all the back-flushing control valves 34 are closed, the bypass pipe 3 directly transmits the flue gas discharged from the incinerator 2 to the fly ash collecting pipe section F, and heats the fly ash adhered to the smoke exhaust pipe 1, so that the fly ash falls off.

As can be seen from fig. 3, when the bypass main valve 31, the bypass heating control valve 32 and all the back-flushing control valves 34 are opened, the bypass pipe 3 directly transmits the flue gas discharged from the incinerator 2 to the fly ash collecting pipe section F, and heats the fly ash adhered to the smoke exhaust pipe 1, so that the fly ash falls off. And the fly ash filter screen 5 is reversely swept by the flue gas.

As can be seen from FIG. 4, when the bypass main valve 31, all the back-flushing control valves 34 are opened, and the bypass heating control valve 32 is closed, the flue gas only performs back-flushing on the fly ash filter screen 5.

As can be seen from fig. 5, when the bypass main valve 31 is opened, the supply air pressurizing pump 33 is started, and the bypass heating control valve 32 and all the back-flushing control valves 34 are closed.

As can be seen from fig. 6 and 7, the fly ash collecting device 4 comprises a housing 41 and an ash hopper 42 arranged at the lower part of the housing 41, and an ash receiving opening is opened at the upper part of the housing 41 and is opposite to the fly ash collecting opening; a roller 43 is arranged in the shell 41, and the roller 43 is opposite to the ash receiving port; the roller 43 comprises a hollow cylindrical roller bracket and a roller shell covering the outside of the roller bracket, and the roller bracket is connected with a roller driving motor 44 through a roller driving rod; an electrode cavity is formed in the roller support, a support frame 46 penetrates through the electrode cavity, the roller 43 rotates relative to the support frame 46, an electrostatic generator 45 is fixedly arranged on the support frame 46, the electrostatic generator 45 is arranged right below the ash receiving port, and an electric field generated by the electrostatic generator 45 is distributed in a direction and penetrates through the ash receiving port.

As can be seen from fig. 1, the last fly ash collecting section in the fly ash collecting pipe sections F is a tail end fly ash collecting section, the rear end of the tail end fly ash collecting section is also provided with a fly ash return section, the inner wall of the smoke exhaust pipeline 1 where the fly ash return section is located is provided with two sets of reverse electrode groups, each set of reverse electrode group is respectively provided with M reverse electrodes J3, the reverse electrodes of the two sets of reverse electrode groups are alternately arranged, two adjacent reverse electrodes are parallel to each other and have equal distances, the plane where each reverse electrode J3 is located is perpendicular to the extending direction of the smoke exhaust pipeline 1, and each set of reverse electrode group is correspondingly connected with a reverse power supply;

the distance between two adjacent counter electrodes J3 is smaller than the distance between two adjacent electrodes J1; in this embodiment, M is an even number, and in the actual set installation, the distance between adjacent electrodes is between 5 and 10 cm.

The reverse supply voltage of the counter electrode J3 is greater than the supply voltage of the electrode J1; the outer wall of the smoke exhaust pipeline 1 where the fly ash backflow section is located is also provided with a pair of reverse electrode plates J4, and the direction of an electric field generated by the pair of reverse electrode plates is parallel to the gravity direction of the smoke exhaust pipeline 1.

As can also be seen from fig. 1, the pipe wall at the bottom of the smoke exhaust pipe 1 where the fly ash backflow segment is located is provided with a backflow groove, the pipe wall where the backflow groove is located gradually expands from the rear end to the front end along the radial direction of the smoke exhaust pipe 1, and the backflow notch of the backflow groove faces the fly ash collection port.

As can also be seen from fig. 6, the whole fly ash collecting port is in the shape of an inverted frustum, a reciprocating purging port is formed in the side wall of the fly ash collecting port, the reciprocating purging port is connected with a purging end of a reciprocating purging header pipe 61, a reciprocating filter screen 62 is arranged at the reciprocating purging port, and an air outlet of the reciprocating purging header pipe 61 is communicated with the rear end of the fly ash collecting pipe section F;

the reciprocating purging main pipe 61 is also provided with a reciprocating purging branch pipe 66, and one end of the reciprocating purging branch pipe 66, which is far away from the reciprocating purging main pipe 61, is communicated with the side wall of the smoke exhaust pipeline 1, which is far away from the fly ash collecting port;

the reciprocating purging main pipe 61 is provided with an air outlet main valve 63 and a reciprocating purging control valve 64, the reciprocating purging branch pipe 66 is arranged between the air outlet main valve 63 and the reciprocating purging control valve 64, and the reciprocating purging branch pipe 66 is provided with an air inlet valve 65.

When the main air outlet valve 63 and the reciprocating purging control valve 64 are opened, the air inlet valve 65 is closed; the flue gas enters the reciprocating blowing header pipe 61 from the reciprocating blowing port and is blown out from the rear end of the fly ash collecting pipe section F;

when the reciprocating purging control valve 64 and the air inlet valve 65 are opened, the air outlet main valve 63 is closed; flue gas enters from the reciprocating purging branch pipe 66 and is blown out from the reciprocating purging port of the reciprocating purging header pipe 61, and the reciprocating purging is performed on the reciprocating filtering net 62 of the reciprocating purging port.

As can be seen from fig. 5 and 9, a water cleaning fly ash device S is further disposed on the smoke exhaust duct 1 at the rear end of the fly ash collecting pipe section F, the water cleaning fly ash device includes a sealed cleaning water tank S1, a smoke exhaust inlet and a smoke exhaust outlet are disposed on the cleaning water tank S1, the rear end of the fly ash collecting pipe section F extends into the water below the water surface of the cleaning water tank S1 through the smoke exhaust inlet, and the smoke of the smoke exhaust duct 1 is exhausted from the smoke exhaust outlet;

the inside of the cleaning water tank S1 is vertically provided with 14 ash drainage hoods S2, and in figure 6, two ash drainage hoods S2 are covered.

The ash residue drainage cover S2 is conical as a whole, the conical bottom of the ash residue drainage cover S2 faces the bottom of the cleaning water tank S1, the top of the ash residue drainage cover S2 is connected with a water outlet pipe S3, and the water outlet pipe S3 is communicated with the interior of the ash residue drainage cover S2;

a water inlet pipe S7 and a water outlet header pipe S4 are further arranged in the cleaning water tank S1, and all the water outlet pipes S3 are communicated with the water outlet header pipe S4;

the bottom of the cleaning water tank S1 is also provided with x air feeding heads S5, the x air feeding heads S5 are connected with the same air feeding pipe S6, and the x air feeding heads S5 are fixedly arranged under the orthographic projection of the x ash drainage covers S2 in a one-to-one correspondence manner. In this embodiment, x is 14.

In this embodiment, an air feed pump is further connected to the air feed pipe S6, and an intake pump is attached to the intake pipe S7. A water outlet pump is arranged at the tail end of the water outlet main pipe S4.

It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the spirit and scope of the present invention.

Claims (7)

1. The utility model provides a flying dust processing system based on refuse classification handles, includes smoke exhaust pipe (1), this smoke exhaust pipe (1) advance the cigarette end and burn burning furnace (2) top intercommunication, this smoke exhaust pipe (1) sets gradually into waste heat collecting pipe section (Y) and flying dust collecting pipe section (F) along the direction of discharging fume, its characterized in that: at least two sections of fly ash collecting sections are sequentially arranged along the fly ash collecting pipe section (F); the fly ash collecting section comprises a fly ash decelerating section and a fly ash gathering and recovering section, and an electrode purifying module is arranged in the fly ash collecting pipe section (F) and is used for performing deceleration control on fly ash in a flue in the fly ash decelerating section and gathering and recovering the fly ash passing through the fly ash gathering and recovering section;

the end part of the smoke inlet end of the smoke exhaust pipeline (1) is also provided with a bypass pipeline (3), an air outlet of the bypass pipeline (3) is communicated with the front end of the fly ash collecting pipe section (F), and the bypass pipeline (3) is used for directly transmitting smoke discharged from the incinerator (2) to the fly ash collecting pipe section (F) to heat fly ash adhered to the smoke exhaust pipeline (1) so as to enable the fly ash to fall off.

2. The fly ash treatment system based on waste classification processing according to claim 1, wherein:

the electrode purification module comprises two groups of electrode groups and a pair of electrode plates (J2);

the two groups of electrode groups are arranged on the inner wall of the smoke exhaust pipeline (1) where the fly ash collecting pipe section (F) is located, each group of electrode group is provided with N electrodes (J1), the electrodes of the two groups of electrode groups are alternately arranged, two adjacent electrodes are parallel to each other and have equal distance, the plane where each electrode (J1) is located is perpendicular to the extending direction of the smoke exhaust pipeline (1), and each group of electrode group is correspondingly connected with one phase of power supply;

the pair of electrode plates (J2) is arranged on the outer wall of the smoke exhaust pipeline (1) where the fly ash collecting pipe section (F) is located, and the direction of an electric field generated by the pair of electrode plates is parallel to the gravity direction of the smoke exhaust pipeline (1).

3. The fly ash treatment system based on waste classification processing according to claim 2, wherein: the pipe wall at the bottom of the smoke exhaust pipeline (1) where the fly ash gathering and recovering section is located gradually expands from the front end to the rear end along the radial direction to form a diversion trench, a fly ash collecting port is formed in the smoke exhaust pipeline (1) where the tail end of the diversion trench is located, and a fly ash collecting device (4) is installed at the fly ash collecting port;

the inner wall of the smoke exhaust pipeline (1) at the fly ash collecting port is also provided with a fly ash filter screen (5), the windward side of the fly ash filter screen (5) faces the fly ash deceleration section, the fly ash filter screen is fixed on a reverse purging branch pipe, the air outlet of the reverse purging branch pipe is embedded on the leeward side of the fly ash filter screen (5), and the reverse purging branch pipe is communicated with the bypass pipeline (3).

4. The fly ash treatment system based on waste classification processing according to claim 3, wherein: the fly ash collecting device (4) comprises a shell (41) and an ash hopper (42) arranged at the lower part of the shell (41), wherein an ash receiving port is formed at the upper part of the shell (41), and the ash receiving port is opposite to the fly ash collecting port;

a roller (43) is arranged in the shell (41), and the roller (43) is opposite to the ash receiving port;

the roller (43) comprises a hollow cylindrical roller bracket and a roller shell covering the outside of the roller bracket, and the roller bracket is connected with a roller driving motor (44) through a roller driving rod;

an electrode cavity is formed in the roller support, a support frame (46) penetrates through the electrode cavity, the roller (43) rotates relative to the support frame (46), an electrostatic generator (45) is fixedly arranged on the support frame (46), the electrostatic generator (45) is arranged under the ash receiving port, and the direction of an electric field generated by the electrostatic generator (45) is distributed and penetrates through the ash receiving port.

5. The fly ash treatment system based on waste classification processing according to claim 4, wherein: the last fly ash collecting section in the fly ash collecting pipe section (F) is a tail end fly ash collecting section, the rear end of the tail end fly ash collecting section is also provided with a fly ash backflow section, the inner wall of a smoke exhaust pipeline (1) where the fly ash backflow section is located is provided with two groups of reverse electrodes, each group of reverse electrodes is respectively provided with M reverse electrodes (J3), the reverse electrodes of the two groups of reverse electrodes are alternately arranged, two adjacent reverse electrodes are parallel to each other and have equal distance, the plane where each reverse electrode (J3) is located is vertical to the extending direction of the smoke exhaust pipeline (1), and each group of reverse electrodes is correspondingly connected with a reverse power supply;

the distance between two adjacent counter electrodes (J3) is smaller than the distance between two adjacent electrodes (J1);

the reverse supply voltage of the counter electrode (J3) is greater than the supply voltage of the electrode (J1);

the outer wall of the smoke exhaust pipeline (1) where the fly ash backflow section is located is also provided with a pair of reverse electrode plates (J4), and the direction of an electric field generated by the pair of reverse electrode plates is parallel to the gravity direction of the smoke exhaust pipeline (1);

the pipe wall at the bottom of the smoke exhaust pipeline (1) where the fly ash backflow section is located is provided with a backflow groove, the pipe wall where the backflow groove is located gradually expands from the rear end to the front end of the smoke exhaust pipeline (1) along the radial direction, and the backflow notch of the backflow groove faces the fly ash collecting opening.

6. A fly ash treatment system based on a waste classification process according to claim 4 or 5, wherein: the whole fly ash collecting port is in an inverted frustum shape, a reciprocating purging port is formed in the side wall of the fly ash collecting port and is connected with a purging end of a reciprocating purging main pipe (61), a reciprocating filter screen (62) is arranged at the reciprocating purging port, and an air outlet of the reciprocating purging main pipe (61) is communicated with the rear end of the fly ash collecting pipe section (F);

the reciprocating purging main pipe (61) is also provided with a reciprocating purging branch pipe (66), and one end of the reciprocating purging branch pipe (66) far away from the reciprocating purging main pipe (61) is communicated with the side wall of the smoke exhaust pipeline (1) far away from the fly ash collecting port;

an air outlet main valve (63) and a reciprocating purging control valve (64) are arranged on the reciprocating purging main pipe (61), the reciprocating purging branch pipe (66) is arranged between the air outlet main valve (63) and the reciprocating purging control valve (64), and an air inlet valve (65) is arranged on the reciprocating purging branch pipe (66).

7. The fly ash treatment system based on waste classification processing according to claim 3, wherein: a bypass main valve (31) and a bypass heating control valve (32) are arranged on the bypass pipeline (3), a filtering branch pipe is further arranged between the bypass main valve (31) and the bypass heating control valve (32), the filtering branch pipe is connected with a back-blowing main pipe, at least two back-blowing branch pipes are arranged on the back-blowing main pipe, and the back-blowing branch pipes respectively supply air to the fly ash filter screen (5) correspondingly;

the back-blowing control device is characterized in that an air supply pressure pump is further arranged at the front end of the back-blowing branch pipe, and back-blowing control valves are arranged on the back-blowing branch pipes.

Images