阅读说明：本技术 一种利用线路板树脂代替粉煤的方法及其树脂粉喷枪 (Method for replacing pulverized coal with circuit board resin and resin powder spray gun thereof ) 是由 尹正科 赵海 李云玉 李俊先 施建龙 丁勇 黄荣智 黄文� 于 2021-07-27 设计创作，主要内容包括：本发明提供一种利用线路板树脂代替粉煤的方法。所述利用线路板树脂代替粉煤的方法,包括以下步骤：S1废旧线路板拆解后分选出线路板；S2线路板破碎分选形成树脂颗粒；S3对步骤S2中破碎后的树脂颗粒进行研磨处理形成树脂粉；S4通过喷枪将树脂粉鼓到熔炼炉内焚烧；S5焚烧后对烟气输送至二燃室进行二次燃烧和特殊处理。本发明提供的利用线路板树脂代替粉煤的方法具有用难以处理的树脂粉来代替冶炼过程中喷枪粉煤的用途,经过5年的生产试验,废线路板用富氧顶吹熔池熔炼是可行的,通过对线路板树脂的成分研究表明,废线路板树脂可以代替喷枪粉煤,且排放的烟气各项指标都达到国家危废的燃烧标准。(The invention provides a method for replacing pulverized coal by circuit board resin. The method for replacing pulverized coal by using circuit board resin comprises the following steps: s1, separating the waste circuit boards after disassembling; s2 breaking and sorting the circuit board to form resin particles; s3, grinding the crushed resin particles in the step S2 to form resin powder; s4, blowing the resin powder into a smelting furnace through a spray gun for incineration; and S5, after incineration, the flue gas is conveyed to a second combustion chamber for secondary combustion and special treatment. The method for replacing pulverized coal by circuit board resin provided by the invention has the purpose of replacing spray gun pulverized coal in a smelting process by resin powder which is difficult to process, through 5-year production tests, the waste circuit board is feasible to be smelted by an oxygen-enriched top-blown molten pool, and the research on the components of the circuit board resin shows that the waste circuit board resin can replace the spray gun pulverized coal, and all indexes of the discharged smoke reach the national hazardous waste combustion standard.)

1. A method for replacing pulverized coal by circuit board resin is characterized by comprising the following steps:

s1, separating the waste circuit boards after disassembling;

s2 breaking and sorting the circuit board to form resin particles;

s3, grinding the crushed resin particles in the step S2 to form resin powder;

s4, blowing the resin powder into a smelting furnace through a spray gun for incineration;

and S5, after incineration, the flue gas is conveyed to a second combustion chamber for secondary combustion and special treatment.

2. The method of claim 1, wherein the circuit board resin selected in step S1 contains organic matter and carbon.

3. The method of claim 1, wherein the crushed resin particles in step S2 have a diameter of 0.1-3 mm.

4. The method of claim 1, wherein the particle size of the resin powder ground in step S3 is 0.1mm-1 mm.

5. The method of claim 1, wherein valuable elements in the resin are recovered after the resin powder is burned in step S4, the flue gas enters the second combustion chamber, the flue gas is fully burned under the condition of supplying rich oxygen at a temperature > 1100 ℃, so that dioxin is completely decomposed, and in order to prevent the flue gas from being slowly cooled after the second combustion chamber and being regenerated into dioxin, the flue gas is passed through the quench tower, and after being rapidly cooled, the flue gas is passed through the spray absorption tower, the activated carbon absorption tower and the bag-type dust collector and then is discharged through the chimney to reach the standard.

6. The method of claim 5, wherein the inlet temperature of the second combustion chamber is higher than 1300 ℃, the outlet temperature is higher than 1100 ℃, the residence time of the flue gas is higher than 3 seconds under the maximum load, and the residual oxygen content of the flue gas is 6-12%.

7. A resin powder spray gun using circuit board resin to replace pulverized coal is characterized by comprising:

the technical air pipe is arranged on the outer side of the resin powder pipe, the main air pipe is arranged on the outer side of the technical air pipe, and the resin powder pipe is used for blowing resin powder of the circuit board into the smelting furnace;

the output end of the main air pipe air inlet is communicated with the input end of the process air pipe;

the output end of the sleeve air pipe air inlet is communicated with the input end of the main air pipe;

the spiral-flow piece, the spiral-flow piece set up in the inside of technology tuber pipe, the spiral-flow piece is located the output of resin powder pipe.

8. The resin powder spray gun for replacing pulverized coal with circuit board resin as claimed in claim 7, wherein a flow-restricting ring is arranged inside the air inlet of the main air duct, a flow hole is formed inside the flow-restricting ring, an adjusting chute is formed on the flow-restricting ring, and the inside of the adjusting chute is communicated with the inside of the flow hole;

a connecting cover is arranged on the outer side of the air inlet of the main air pipe, a partition plate is fixedly connected to the inner wall of the connecting cover, a through hole is formed in the partition plate, and a first flow guide hole and a second flow guide hole are respectively formed between one side of the connecting cover and the air inlet of the main air pipe;

the inner wall fixedly connected with reset spring of connecting cover, one side fixedly connected with piston plate of reset spring, the piston plate install in between connecting cover and the baffle, the slide is adjusted to one side fixedly connected with of piston plate, the one end of adjusting the slide runs through in proper order the surface of connecting cover with the surface of main tuber pipe air intake and extend to the inside of main tuber pipe air intake, adjust the surface of slide with the internal surface sliding connection of adjusting the spout.

9. The resin powder injection gun using a circuit board resin instead of pulverized coal as set forth in claim 8, wherein the first guide hole is formed above the restrictor ring, and the inside of the first guide hole is communicated with one side of the piston plate through the inside of the through hole.

10. The resin powder injection gun for replacing pulverized coal with circuit board resin as claimed in claim 9, wherein the second guide hole is located below the restrictor ring, and the inside of the second guide hole is communicated with the other side of the piston plate.

Technical Field

The invention relates to the technical field of harmless and recycling treatment of circuit boards, in particular to a method for replacing pulverized coal by circuit board resin and a method for using a resin powder spray gun thereof.

Background

The circuit board is the foundation of modern electrical appliance manufacturing industry, is widely applied to each electronic product, and along with the continuous development of economic society, the output of the circuit board is rapidly increased, so that China becomes a large producing country and a large consuming country of the electronic product, a large amount of waste circuit boards are continuously generated, and how to carry out harmless and resource treatment on the waste circuit boards in the electronic waste becomes a problem to be solved urgently in the world.

The annual output of the waste circuit boards accounts for 5-8% of the electronic waste, the circuit board resin accounts for 50% of the mass of the circuit boards, the metal elements account for 30% of the mass of the circuit boards, and a certain amount of glass fibers and inorganic fillers. In 2020, the output of circuit board resin in China exceeds 100 million tons.

The components of the circuit board resin are detected, the circuit board resin contains 35% of carbon and has strong reducibility, the content of organic matter epoxy resin, phenolic resin and cellulose in the circuit board resin is high, the calorific value generated by combustion is large, and the circuit board resin can replace the function of spray gun pulverized coal.

Therefore, it is necessary to provide a method for replacing pulverized coal with circuit board resin and a method for using the resin powder spray gun thereof to solve the above technical problems.

Disclosure of Invention

The invention provides a method for replacing pulverized coal with circuit board resin, which solves the problem that the circuit board resin is inconvenient to carry out harmless and recycling treatment.

In order to solve the technical problem, the method for replacing pulverized coal by circuit board resin provided by the invention comprises the following steps:

s1, separating the waste circuit boards after disassembling;

s2 breaking and sorting the circuit board to form resin particles;

s3, grinding the crushed resin particles in the step S2 to form resin powder;

s4, blowing the resin powder into a smelting furnace through a spray gun for incineration;

and S5, after incineration, the flue gas is conveyed to a second combustion chamber for secondary combustion and special treatment.

Preferably, the wiring board resin selected in step S1 includes an organic material and carbon.

Preferably, the particle size of the resin particles crushed in step S2 is 0.1mm to 3 mm.

Preferably, the particle size of the resin powder ground in the step S3 is 0.1mm to 1 mm.

Preferably, in the step S4, valuable elements in the resin are recovered after the resin powder is burned, the flue gas enters a secondary combustion chamber, the flue gas is sufficiently combusted under the condition of supplying rich oxygen, the temperature is higher than 1100 ℃, so that dioxin is completely decomposed, in order to prevent the flue gas from being slowly cooled after the secondary combustion chamber to generate dioxin again, the flue gas needs to pass through a quench tower, and after being rapidly cooled, the flue gas passes through a spray absorption tower, an activated carbon absorption tower and a bag-type dust collector and then is discharged after reaching the standard through a chimney.

Preferably, the inlet temperature of the second combustion chamber is more than 1300 ℃, the outlet temperature of the second combustion chamber is more than 1100 ℃, the residence time of the smoke is more than 3 seconds under the maximum load, and the residual oxygen content of the smoke is 6-12%.

A resin powder spray gun for replacing pulverized coal with circuit board resin, comprising:

the technical air pipe is arranged on the outer side of the resin powder pipe, the main air pipe is arranged on the outer side of the technical air pipe, and the resin powder pipe is used for blowing resin powder of the circuit board into the smelting furnace;

the output end of the main air pipe air inlet is communicated with the input end of the process air pipe;

the output end of the sleeve air pipe air inlet is communicated with the input end of the main air pipe;

the spiral-flow piece, the spiral-flow piece set up in the inside of technology tuber pipe, the spiral-flow piece is located the output of resin powder pipe.

Preferably, a flow-limiting ring is arranged inside the air inlet of the main air pipe, a flow hole is formed inside the flow-limiting ring, an adjusting sliding groove is formed in the flow-limiting ring, and the inside of the adjusting sliding groove is communicated with the inside of the flow hole;

a connecting cover is arranged on the outer side of the air inlet of the main air pipe, a partition plate is fixedly connected to the inner wall of the connecting cover, a through hole is formed in the partition plate, and a first flow guide hole and a second flow guide hole are respectively formed between one side of the connecting cover and the air inlet of the main air pipe;

the inner wall fixedly connected with reset spring of connecting cover, one side fixedly connected with piston plate of reset spring, the piston plate install in between connecting cover and the baffle, the slide is adjusted to one side fixedly connected with of piston plate, the one end of adjusting the slide runs through in proper order the surface of connecting cover with the surface of main tuber pipe air intake and extend to the inside of main tuber pipe air intake, adjust the surface of slide with the internal surface sliding connection of adjusting the spout.

Preferably, the first guide hole is located above the restrictor ring, and the inside of the first guide hole is communicated with one side of the piston plate through the inside of the through hole.

Preferably, the second guide hole is located below the restrictor ring, and the inside of the second guide hole is communicated with the other side of the piston plate.

Compared with the related art, the method for replacing pulverized coal by using circuit board resin provided by the invention has the following beneficial effects:

the invention provides a method for replacing pulverized coal by circuit board resin, which uses resin powder which is difficult to process to replace the usage of spray gun pulverized coal in the smelting process, and through 5 years of production tests, the waste circuit board is feasible to be smelted by an oxygen-enriched top-blown molten pool.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a resin powder spray gun using circuit board resin instead of pulverized coal according to the present invention;

FIG. 2 is a schematic structural view of a second embodiment of a resin powder spray gun using circuit board resin instead of pulverized coal according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a three-dimensional view of the restrictor ring shown in FIG. 2;

FIG. 5 is a schematic structural view of a resin powder tube of the resin powder spray gun of the present invention using circuit board resin instead of pulverized coal;

FIG. 6 is an enlarged view of the portion B shown in FIG. 5;

fig. 7 is an exploded view of the fixed outer tube and the movable inner tube shown in fig. 5.

Reference numbers in the figures:

1. a resin powder tube;

2. a process air duct;

3. a main air duct;

4. an air inlet of the main air duct;

5. an air inlet of the sleeve air pipe;

6. a spinning disk;

7. a flow limiting ring 71, a flow hole 72 and an adjusting chute;

8. the connecting cover 81, the partition board 811, the through holes 82, the first flow guide holes 83 and the second flow guide holes;

9. a return spring 91, a piston plate 92 and an adjusting slide plate;

100. the device comprises a fixed outer pipe 110, a first connecting disc 111, a mounting groove 112 and an embedded groove;

200. the movable inner pipe 210, the second connecting disc 220 and the inlaid ring.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, wherein fig. 1 is a schematic structural view of a resin powder spray gun using a circuit board resin to replace pulverized coal according to a first embodiment of the present invention; FIG. 2 is a schematic structural view of a second embodiment of a resin powder spray gun using circuit board resin instead of pulverized coal according to the present invention; FIG. 3 is an enlarged view of portion A of FIG. 2; FIG. 4 is a three-dimensional view of the restrictor ring shown in FIG. 2; FIG. 5 is a schematic structural view of a resin powder tube of the resin powder spray gun of the present invention using circuit board resin instead of pulverized coal; FIG. 6 is an enlarged view of the portion B shown in FIG. 5; fig. 7 is an exploded view of the fixed outer tube and the movable inner tube shown in fig. 5.

A method for replacing pulverized coal by circuit board resin comprises the following steps:

s1, separating the waste circuit boards after disassembling;

s2 breaking and sorting the circuit board to form resin particles;

s3, grinding the crushed resin particles in the step S2 to form resin powder;

s4, blowing the resin powder into a smelting furnace through a spray gun for incineration;

and S5, after incineration, the flue gas is conveyed to a second combustion chamber for secondary combustion and special treatment.

The resin powder formed after the waste circuit boards are broken, disassembled and sorted replaces the action of spray gun powdered coal, and the spray gun blows the resin powder of the circuit boards to a smelting furnace for incineration, so that not only are temperature and reducing agents provided for smelting, but also the problem that the waste circuit boards are difficult to treat is solved.

The circuit board resin selected in step S1 contains organic matter and carbon.

The circuit board resin has high organic content, and the calorific value is about 3400 kcal/kg;

the circuit board resin has high carbon content, about 35% of carbon;

the calorific value and carbon content of the circuit board resin are about half of those of pulverized coal, so that when the spray gun pulverized coal is replaced by the circuit board resin, the consumed circuit board resin is twice of that of the pulverized coal, and the efficiency of processing the circuit board resin powder is high.

The particle diameter of the broken resin particles in the step S2 is 0.1mm-3 mm.

The particle size of the resin powder ground in the step S3 is 0.1mm-1 mm.

The particle diameter of the circuit board resin is greatly different from that of the pulverized coal, the circuit board resin is about 10 times of that of the pulverized coal, the circuit board resin replaces spray gun pulverized coal, a pulverized coal pipe of a pulverized coal spray gun is properly enlarged or the circuit board resin is ground, so that the average particle diameter of the pulverized coal pipe is 0.1-1mm, and in order to prevent the resin powder from blocking a pipeline, the inner diameter of the spray gun resin pipe is adjusted according to actual conditions;

the apparent density of the resin of the circuit board is about 0.45g/cm by modifying the structure of the resin powder spray gun³And the apparent density of the pulverized coal is 0.8g/cm³The resin powder has the particle size 10 times that of the powdered coal, the selection of the blowing air pressure is related to the blowing amount and the diameter of the pipeline required per hour, and the air pressure for blowing the resin powder is selected according to the feeding amount and the diameter of the pipeline in order to ensure that the resin powder reaches or exceeds the blowing effect of the powdered coal.

The powdered coal pipe of spray gun needs to be increased to circuit board resin powder instead of powdered coal, and firstly the consumption of circuit board resin powder is about twice of powdered coal to reach its effect, and secondly the particle diameter of circuit board resin powder is bigger than powdered coal to prevent its jam.

In the step S4, valuable elements in the resin are recovered after resin powder is burned, the flue gas enters a secondary combustion chamber, the flue gas is fully combusted under the condition of supplying oxygen enrichment, the temperature is higher than 1100 ℃, dioxin is completely decomposed, and in order to prevent the flue gas from being slowly cooled after the secondary combustion chamber to generate dioxin again, the flue gas needs to pass through a quench tower, and after being rapidly cooled, the flue gas passes through a spray absorption tower, an active carbon adsorption tower and a bag-type dust collector and then is discharged after reaching the standard through a chimney.

The inlet temperature of the second combustion chamber is more than 1300 ℃, the outlet temperature is more than 1100 ℃, the smoke retention time is more than 3 seconds and the residual oxygen of the smoke is 6-12% under the maximum load.

The epoxy resin content in the circuit board resin is large, the circuit board resin is extremely difficult to be subjected to resource treatment, harmful gases such as dioxin can be generated by burning, and secondary pollution can be caused if the circuit board resin is not properly treated.

The circuit board resin is fully combusted in the smelting furnace, valuable elements in the resin are recovered, the flue gas enters the secondary combustion chamber, the flue gas is fully combusted under the condition of supplying rich oxygen, the temperature is higher than 1100 ℃, dioxin is completely decomposed, and in order to avoid the problem that the flue gas is slowly cooled after the secondary combustion chamber to generate the dioxin again, the flue gas needs to pass through a quench tower. After the flue gas is rapidly cooled, the flue gas passes through a spray absorption tower, an active carbon absorption tower and a bag-type dust collector and then is discharged after reaching the standard through a chimney;

the quench tower flue gas temperature can be reduced from 650 ℃ to below 200 ℃ in 1 second;

SO in the flue gas absorbed by the spray tower₂HBr, HCl and the like and recovering bromine salt.

The circuit board resin powder belongs to internationally recognized persistent organic pollutants, and the state lists the waste circuit board resin powder in the dangerous waste record, and belongs to 1# HW13 organic resins.

In the smelting industry, not all powder coal guns are suitable to be replaced by resin powder guns, the resin powder burning of the circuit board can generate chloro-bromide products and dioxin, and common smelting enterprises can not process the subsequent flue gas to reach the standard;

the flue gas of the invention is specially treated by a flue gas purification system, and reaches the national emission standard GB 18484-2021.

The national science and technology department scientific and technological support project 'the key technology of full-component high-valued clean utilization of waste circuit boards' has made certain research work in the field of harmless treatment and resource utilization of electronic wastes, adopts a sealed rotary furnace for incineration through a 'fire-humidity combination method', and firstly carries out sealed incineration on the waste circuit boards, so that all organic components in the waste circuit boards are combusted, and gas is treated by special environment-friendly equipment, so that the environment is not influenced.

The working principle of the method for replacing pulverized coal by circuit board resin provided by the invention is as follows:

the circuit board resin has high organic matter content, high heat value and high carbon content, is suitable for replacing the function of pulverized coal in smelting, and generates toxic and harmful gases such as dioxin and the like after being combusted.

Compared with the related art, the method for replacing pulverized coal by using circuit board resin provided by the invention has the following beneficial effects:

the resin powder which is difficult to process is used for replacing the spray gun powdered coal in the smelting process, 5 years of production tests prove that the waste circuit board is feasible to be smelted by an oxygen-enriched top-blown molten pool, the research on the components of the circuit board resin shows that the waste circuit board resin can replace the spray gun powdered coal, and all indexes of the discharged smoke reach the national hazardous waste combustion standard.

Example 1:

a resin powder spray gun for replacing pulverized coal with circuit board resin, comprising:

the technical air duct comprises a resin powder tube 1, a technical air duct 2 and a main air duct 3, wherein the technical air duct 2 is arranged on the outer side of the resin powder tube 1, the main air duct 3 is arranged on the outer side of the technical air duct 2, and the resin powder tube 1 is used for blowing resin powder of a circuit board into a smelting furnace;

the output end of the main air pipe air inlet 4 is communicated with the input end of the process air pipe 2;

the output end of the sleeve air pipe air inlet 5 is communicated with the input end of the main air pipe 3;

and the rotational flow sheet 6 is arranged inside the process air pipe 2, and the rotational flow sheet 6 is positioned at the output end of the resin powder pipe 1.

After the waste circuit board is subjected to resource treatment through a plurality of steps of disassembly, crushing, separation and the like, the residual resin is basically circuit board resin, and the particle size of the resin is different and is approximately between 0.1mm and 3 mm;

grinding is also needed to form powder with the particle size of 0.1-1 mm.

Resin powder of the circuit board is blown into a smelting furnace through a resin powder pipe 1, and air and oxygen are blown into the pipeline through a process air pipe 2, a main air pipe air inlet 4, a sleeve air pipe air inlet 5 and the like to support combustion, so that the circuit board resin powder is completely combusted in the smelting furnace;

the flue gas is discharged through a chimney with the height of 50 meters after being specially treated to reach the standard.

The rotational flow sheets 6 can improve convection heat transfer, enhance heat exchange quantity, reduce the wall temperature of the spray gun pipeline, and are beneficial to complete reaction after oxygen-enriched air is contacted with the resin of the circuit board.

Example 2:

a flow-limiting ring 7 is arranged inside the air inlet 4 of the main air pipe, a flow hole 71 is formed inside the flow-limiting ring 7, an adjusting sliding groove 72 is formed in the flow-limiting ring 7, and the inside of the adjusting sliding groove 72 is communicated with the inside of the flow hole 71;

a connecting cover 8 is arranged on the outer side of the main air pipe air inlet 4, a partition plate 81 is fixedly connected to the inner wall of the connecting cover 8, a through hole 811 is formed in the partition plate 81, and a first flow guide hole 82 and a second flow guide hole 83 are respectively formed between one side of the connecting cover 8 and the main air pipe air inlet 4;

inner wall fixedly connected with reset spring 9 of connecting cover 8, one side fixedly connected with piston plate 91 of reset spring 9, piston plate 91 install in between connecting cover 8 and the baffle 81, slide 92 is adjusted to one side fixedly connected with of piston plate 91, the one end of adjusting slide 92 runs through in proper order connecting cover 8 the surface with the surface of main tuber pipe air intake 4 just extends to the inside of main tuber pipe air intake 4, adjust slide 92 the surface with adjust the internal surface sliding connection of spout 72.

Through the arrangement of the connecting cover 8 and the flow-limiting ring 7 on the main air pipe air inlet 4, when air is input from the input end of the main air pipe air inlet 4 and the air pressure is greater than the pressure at the output end of the main air pipe air inlet 4, the air at the input end pushes the piston plate 91 to move in the direction away from the main air pipe air inlet 4 under the action of the pressure difference, the piston plate 91 drives the adjusting sliding plate 92 to synchronously slide, and the adjusting sliding plate 92 gradually separates from the inside of the adjusting sliding groove 72 when sliding, so that the flow hole 71 is opened and the opening size is gradually increased;

the opening caliber of the flow hole 71 can be controlled according to the pressure intensity of the input gas of the main air pipe air inlet 4, wherein the maximum moving distance of the piston plate 91 cannot exceed the position of the through hole 811 through the limiting action of the reset spring 9, meanwhile, the reset spring 9 provides elasticity and pressure for the piston plate 91 when resetting, and the piston plate 91 is convenient to reset quickly when not used.

When the air pressure at the output end of the main air pipe air inlet 4 is higher than the air pressure at the input end, the air at the output end passes through the first flow guide holes 82 and the through holes 811 and then presses the piston plate 91, the piston plate 91 drives the adjusting slide plate 92 to slide towards the inside of the adjusting slide groove 72, and when the adjusting slide plate 92 completely moves to the inside of the adjusting slide groove 72, the adjusting slide plate 92 closes the flow hole 71, so that the main air pipe air inlet 4 can be automatically closed, the phenomenon of safety accidents caused by air pressure backflow when the incinerator is connected is avoided, and the stability and the safety of the main air pipe air inlet 4 during use are improved.

The first guide hole 82 is located above the restrictor ring 7, and the inside of the first guide hole 82 is communicated with one side of the piston plate 91 through the inside of the through hole 811.

The second guide hole 83 is located below the restrictor ring 7, and the inside of the second guide hole 83 is communicated with the other side of the piston plate 91.

Has the advantages that:

when the air pressure at the output end of the main air pipe air inlet 4 is higher than the air pressure at the input end, the air at the output end passes through the first flow guide holes 82 and the through holes 811 and then exerts pressure on the piston plate 91, the piston plate 91 drives the adjusting slide plate 92 to slide towards the inside of the adjusting chute 72, when the adjusting slide plate 92 completely moves to the inside of the adjusting chute 72, the adjusting slide plate 92 forms a closed state for the flow hole 71, so that the main air pipe air inlet 4 can be automatically closed, the phenomenon of safety accidents caused by air pressure backflow when the incinerator is connected is avoided, and the stability and the safety of the main air pipe air inlet 4 during use are improved.

The resin powder tube 1 comprises a fixed outer tube 100 and a movable inner tube 200;

the head end of the fixed outer tube 100 is fixedly connected with a first connecting disc 110, the first connecting disc 110 is provided with a mounting groove 111 and an embedded groove 112, and the inside of the mounting groove 111 is communicated with the inside of the embedded groove 112;

one end of the movable inner tube 200 is fixedly connected with a second connecting disc 210, and one side of the second connecting disc 210 is fixedly connected with an embedded ring 220.

The outer diameter of the movable inner tube 200 is the same as the inner diameter of the fixed outer tube 100, the inner diameter of the movable inner tube 200 is one half of the inner diameter of the fixed outer tube 100, the movable inner tube 200 can be stably installed inside the fixed outer tube 100, and the movable inner tube 200 can be conveniently installed and detached, so that the inner diameter of the resin powder tube 1 can be conveniently adjusted to adapt to different incineration raw materials;

the outer surface of the second connecting disc 210 is matched with the inner surface of the mounting groove 111, so that the second connecting disc 210 is stably mounted in the mounting groove 111;

the surface of the embedding ring 220 is clamped with the inner surface of the inner embedding groove 112, so that the connecting hole in the second connecting disc 210 and the connecting hole in the first connecting disc 110 can be conveniently and quickly positioned and calibrated, and the first connecting disc 110 and the second connecting disc 210 can be conveniently connected and limited.

Has the advantages that:

the movable inner tube 200 can be stably installed inside the fixed outer tube 100, and the movable inner tube 200 is conveniently installed and detached on the fixed outer tube 100, so that the inner diameter of the resin powder tube 1 can be conveniently adjusted to adapt to different incineration raw materials.

TABLE 1 detection data of resin powder-1

TABLE 2 detection data of resin powder-2

Tables 1 and 2 show the test data of the 1# HW13 resin powder, and the combustion heat value is 3432kcal/kg, the carbon content is 32.75 percent, and the epoxy resin content is more than 55 percent according to the test data of the circuit board resin powder, so the resin powder is suitable for replacing pulverized coal.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.