Solid waste treatment system

Abstract

The utility model relates to the technical field of solid waste pretreatment, and discloses a solid waste treatment system which comprises a feeding device, a flour mill, a solid waste powder spraying tank, a spraying pipe and an evaporation cooling flue. Solid waste materials are ground through the flour mill, so that the particle size of the materials is reduced, the obtained materials with the preset particle size can meet the powder spraying requirement, and the materials with the preset particle size further enter the solid waste powder spraying tank to be stored and are added into the injection pipe from a tank body discharging port of the solid waste powder spraying tank through an injection feeding port of the injection pipe; the materials with the preset particle size are driven by inert gas to be blown into the evaporative cooling flue, after the carbon-containing solid waste enters the evaporative cooling flue, carbon is combusted at high temperature to generate carbon dioxide and carbon monoxide, heat is converted into chemical energy for use, reutilization of carbon resources in the solid waste is achieved, the solid waste is turned into resources, and environmental protection is achieved. Therefore, effective utilization of solid waste is achieved, return sintering is not needed, and the problem that the service life of equipment is damaged due to enrichment of harmful substances in the return sintering process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste pretreatment, in particular to a solid waste treatment system. Background Art

[0002] Solid waste is generated during the steel production process. Currently, solid waste is generally treated by sintering for recycling. For example, in carbon-containing solid wastes such as blast furnace bag ash and ironmaking dust, the iron content is 20%-40% and the carbon content is greater than 15%. Sintering solid waste can improve the utilization rate of raw materials and reduce resource waste.

[0003] However, solid waste also contains a large amount of harmful elements, such as alkaline oxides of lead and zinc. The existing method of directly returning solid waste for sintering and recycling will cause the cyclic enrichment of harmful substances such as lead and zinc, thereby damaging the life of the equipment. Utility Model Content

[0004] In view of this, the utility model provides a solid waste treatment system to solve the problem of damaging the life of equipment during the solid waste treatment process.

[0005] The utility model provides a solid waste treatment system, comprising: a feeding device, suitable for providing solid waste materials; a grinding machine, located downstream of the feeding device, suitable for receiving the solid waste materials and grinding the solid waste materials to a preset particle size to obtain materials with a preset particle size; a solid waste powder spraying tank, located downstream of the grinding machine, the solid waste powder spraying tank having a tank body feeding port and a tank body discharging port, the tank body feeding port being suitable for introducing the materials with the preset particle size into the solid waste powder spraying tank; a blowing pipe, having an air inlet, An air outlet and a spray feed port, wherein the spray feed port is disposed on a pipeline between the air inlet and the air outlet, and the spray feed port is connected with the tank body outlet so as to introduce the preset particle size material in the solid waste powder spray tank into the spray pipe; the air inlet is suitable for introducing an inert gas with a preset flow rate into the spray pipe; a vaporization cooling flue is connected with the air outlet of the spray pipe, and the preset particle size material is sprayed into the vaporization cooling flue through the air outlet for combustion.

[0006] Beneficial effect: by setting up a grinding machine to grind the solid waste material, the particle size of the material becomes smaller, and the obtained preset particle size material can meet the powder spraying requirements. The material reaching the preset particle size is further stored in the solid waste powder spraying tank, and is added into the spraying pipe through the spraying feed port of the spraying pipe from the tank body outlet of the solid waste powder spraying tank. Then, the preset particle size material is sprayed into the vaporization cooling flue under the drive of the inert gas. The solid waste material contains a certain amount of carbon. After the carbon-containing solid waste enters the vaporization cooling flue, the carbon burns at high temperature to generate carbon dioxide and carbon monoxide, and the heat is converted into chemical energy for use, thereby realizing the reuse of carbon resources in the solid waste, turning solid waste into resources, and realizing the effective utilization of solid waste. There is no need to return sintering, and the problem of enriching harmful substances and damaging the equipment life during the return sintering process can be avoided.

[0007] In an optional embodiment, the solid waste treatment system also includes: a magnetic separation device, which is connected between the feeding device and the grinding mill, and is suitable for receiving the solid waste material and magnetically separating the solid waste material to separate iron-rich material and remaining material, and transporting the remaining material to the grinding mill.

[0008] Beneficial effects: Solid waste materials are magnetically separated and classified by a magnetic separation device to obtain iron-rich materials containing iron and residual materials containing no iron, thereby realizing classified treatment of solid waste. After being collected, the iron-rich materials can be directly returned to sintering and continue to become smelting raw materials, thereby realizing the recycling of iron resources in solid waste. Moreover, they do not contain harmful substances such as lead and zinc, thereby avoiding the problem of cyclic enrichment of harmful substances that damages equipment life and affects product quality. The residual materials containing no iron enter into a grinding mill for grinding and subsequent powder spraying and combustion. By classifying and treating solid waste and utilizing them separately, the resource utilization of solid waste is realized and the utilization rate of solid waste is improved.

[0009] In an optional embodiment, the solid waste treatment system also includes: a screening device, which is connected between the magnetic separation device and the grinding mill, and has a first outlet and a second outlet, the first outlet is directly or indirectly connected to the tank feed port, and the second outlet is connected to the grinding mill, the screening device receives the remaining material from the magnetic separation device and screens the remaining material to separate a first material less than or equal to a preset particle size and a second material greater than the preset particle size, the first material is discharged through the first outlet, and the second material is discharged through the second outlet.

[0010] Beneficial effect: By arranging a screening device between the magnetic separation device and the grinding mill, the screening device screens the remaining material, and divides the remaining material into a first material with a particle size less than or equal to a preset particle size and a second material with a particle size greater than the preset particle size according to the particle size, and then discharges the first material through the first outlet, and discharges the second material through the second outlet, thereby separating the first material and the second material, so that only the second material with a larger particle size needs to be transported to the grinding mill for grinding, and the first material with a particle size that meets the requirements does not need to enter the grinding mill for grinding, which can ensure the effective grinding of the grinding mill, is beneficial to extending the service life of the grinding mill, saving costs, and improving work efficiency.

[0011] In an optional embodiment, the solid waste treatment system further includes: a particle bin, which is connected to the first outlet of the screening device to store the first material, and the outlet of the particle bin is directly or indirectly connected to the solid waste powder spray tank.

[0012] Beneficial effect: By setting up a particle bin and connecting the particle bin to the first outlet of the screening device, the first material exported from the first outlet of the screening device enters the particle bin, and the first material is placed in the particle bin for storage and standby use, thereby realizing the storage of the first material, which can be taken out according to demand and is easy to use.

[0013] In an optional embodiment, the solid waste treatment system also includes: a finished powder bin, which is connected between the grinding mill and the solid waste powder spray tank, and has a first powder bin inlet, a second powder bin inlet and a powder bin outlet, the first powder bin inlet is connected to the outlet of the particle bin, the second powder bin inlet is connected to the outlet of the grinding mill, and the powder bin outlet is connected to the tank body feed port of the solid waste powder spray tank.

[0014] Beneficial effect: by setting a finished powder bin between the grinding mill and the solid waste powder spraying tank, the first powder bin entrance of the finished powder bin is connected with the outlet of the particle bin, so that the first material in the particle bin can be introduced into the finished powder bin, and the second powder bin entrance of the finished powder bin is connected with the outlet of the grinding mill, so that the second material ground by the grinding mill can be introduced into the finished powder bin, and the materials exported through the particle bin and the grinding mill are all materials of preset particle size that meet the requirements of spraying, and the finished powder bin can realize the collection of the first material and the second material, and the finished powder bin is used as a transfer bin to store the preset particle size materials to be entered into the solid waste powder spraying tank, which is convenient for use, and a tank body feed port is opened on the solid waste powder spraying tank to connect with the finished powder bin, which can reduce the number of tank body feed ports, simplify the structure, and facilitate installation.

[0015] In an optional embodiment, the solid waste powder spray tank is a sealed tank, the tank body feed port is sealed and connected to the powder bin outlet through a first closed pipe, and the tank body discharge port is sealed and connected to the spray feed port.

[0016] Beneficial effect: By setting the solid waste powder spray tank as a sealed tank, the first closed pipeline sends the preset particle size material in the finished powder bin into the solid waste powder spray tank, which can isolate the air, avoid excessive oxygen mixing in the powder, prevent explosion, and thus improve safety.

[0017] In an optional embodiment, the solid waste powder spray tank is located above the spray pipe, the tank body discharge port is located at the lower end of the solid waste powder spray tank, and the tank body discharge port is connected to the spray feed port through a pipeline.

[0018] Beneficial effect: By setting the tank body discharge port at the lower end of the solid waste powder spray tank, the material in the solid waste powder spray tank can flow out under the action of gravity, and by arranging the solid waste powder spray tank above the spray pipe, the material discharged from the tank body discharge port can directly enter the spray pipe, which is easy to use and has a good material discharge effect.

[0019] In an optional embodiment, the solid waste treatment system further comprises: a discharge valve, wherein the discharge valve is disposed on a pipeline between the tank body discharge port and the injection feed port.

[0020] Beneficial effect: By arranging a discharge valve on the pipeline between the tank discharge port of the solid waste powder spray tank and the blowing feed port of the blowing pipe, the opening and closing of the discharge valve can control the on-and-off of the pipeline, thereby controlling whether the solid waste powder spray tank transports materials to the blowing pipe. Furthermore, the discharge speed can be controlled by controlling the opening degree of the discharge valve, which is convenient for adjustment and control according to actual needs and easy to operate.

[0021] In an optional embodiment, the solid waste treatment system also includes: an air intake valve, which is arranged on the blow pipe at a position close to the air inlet to control the opening and closing of the blow pipe and the flow rate of the inert gas; and / or the feeding device includes: a raw material bin, which is arranged upstream of the magnetic separation device, the raw material bin is suitable for holding the solid waste material, and the bin outlet of the raw material bin is connected to the magnetic separation device to transport the solid waste material to the magnetic separation device; a vacuum tank truck, which is connected to the raw material bin to transport the solid waste material into the raw material bin.

[0022] Beneficial effects: By setting an air intake valve near the air inlet on the injection pipe, the opening and closing of the air intake is controlled by the opening and closing of the air intake valve, thereby realizing the control of the on-off of the inert gas. Furthermore, the size of the air intake can be controlled by controlling the opening degree of the air intake valve to control the flow rate of the inert gas, so that the air intake valve can be adjusted according to actual needs to realize the control of the on-off and flow rate of the inert gas. By setting up a raw material warehouse, solid waste materials can be placed, which is convenient for the storage and use of solid waste materials. The outlet of the raw material warehouse is connected to the magnetic separation device, which is convenient for conveying solid waste materials to the magnetic separation device; solid waste materials are transported to the factory by vacuum tank trucks, and the solid waste materials are transported to the raw material warehouse by vacuum tank trucks, which is convenient for the transportation of solid waste materials without distance restrictions and convenient for transportation.

[0023] In an optional embodiment, the raw material bin is a sealed bin having a bin inlet, and the bin inlet is connected to the vacuum tank truck via a second closed pipe.

[0024] Beneficial effect: By setting the raw material bin as a sealed bin, the bin entrance is opened when in use and the bin entrance is connected to the vacuum tanker through the second closed pipe. The vacuum tanker uses pneumatic force to transport the solid waste materials through the second closed pipe to the closed raw material bin, ensuring that the solid waste materials such as dust removal ash will not overflow during the entry process, avoiding pollution of the surrounding environment BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a structural schematic diagram of a solid waste treatment system according to an embodiment of the utility model;

[0027] Figure 2 This is the particle size distribution diagram of blast furnace bag dry ash particle size.

[0028] Description of reference numerals:

[0029] 1. Magnetic separation device; 2. Grinding mill; 3. Solid waste powder spray tank; 4. Blowing pipe; 401. Air inlet; 402. Air outlet; 403. Blowing feed port; 5. Vaporization cooling flue; 6. Screening device; 7. Particle bin; 8. Finished powder bin; 9. Raw material bin; 10. Vacuum tank truck; 11. First closed pipeline; 12. Second closed pipeline. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0031] Combine the following Figure 1 to Figure 2 , describing an embodiment of the utility model.

[0032] According to an embodiment of the present utility model, a solid waste treatment system is provided, such as Figure 1 As shown, the solid waste treatment system includes: a feeding device, a grinding mill 2, a solid waste powder spraying tank 3, a blowing pipe 4 and a vaporization cooling flue 5. The feeding device is suitable for providing solid waste materials; the grinding mill 2 is located downstream of the feeding device, and is suitable for receiving solid waste materials and grinding the solid waste materials to a preset particle size to obtain a material with a preset particle size; the solid waste powder spraying tank 3 is located downstream of the grinding mill 2, and the solid waste powder spraying tank 3 has a tank body feed port and a tank body discharge port, and the tank body feed port is suitable for introducing the material with a preset particle size into the solid waste powder spraying tank 3; the blowing pipe 4 has an air inlet 401, an air outlet 402 and a blowing feed port 403, and the spray The blowing feed port 403 is provided on the pipeline between the air inlet 401 and the air outlet 402, and the spraying feed port 403 is connected with the tank body outlet to introduce the preset particle size material in the solid waste spraying tank 3 into the spraying pipe 4; the air inlet 401 is suitable for introducing an inert gas with a preset flow rate into the spraying pipe 4; the vaporization cooling flue 5 is connected with the air outlet 402 of the spraying pipe 4, and the preset particle size material is sprayed to the vaporization cooling flue 5 through the air outlet 402 for combustion. Among them, the downstream refers to the downstream along the material conveying direction of the solid waste treatment system; the preset particle size is a predetermined particle size value, and particles with a particle size less than or equal to the preset particle size meet the spraying requirements and can be directly used; the preset flow rate is a preset flow rate, so that the inert gas has a certain flow rate, so that the inert gas can blow the preset particle size to move in the spraying pipe 4.

[0033] The solid waste treatment system of this embodiment is applied, and the solid waste material is ground by setting a grinding machine 2 to reduce the particle size of the material. The obtained preset particle size material can meet the powder spraying requirements. The material reaching the preset particle size is further stored in the solid waste powder spraying tank 3, and is added into the blowing pipe 4 through the blowing feed port 403 of the blowing pipe 4 from the tank body discharge port of the solid waste powder spraying tank 3. Then, the preset particle size material is blown into the vaporization cooling flue 5 driven by the inert gas. The solid waste material contains a certain amount of carbon. After the carbon-containing solid waste enters the vaporization cooling flue 5, the carbon burns at high temperature to generate carbon dioxide and carbon monoxide, and the heat is converted into chemical energy for use, thereby realizing the reuse of carbon resources in the solid waste, turning solid waste into resources, and realizing the effective utilization of solid waste. There is no need to return sintering, and the problem of enriching harmful substances and damaging the equipment life during the return sintering process can be avoided.

[0034] Optionally, the preset particle size is not greater than 300 mesh, preferably 300 mesh. It should be noted that the spraying is to spray powder into the vaporization cooling flue 5 so that the powdered material burns in the vaporization cooling flue 5 to generate carbon dioxide and carbon monoxide, convert heat into chemical energy, increase the CO content in the converter gas, and extend the recovery time of the converter gas; the outlet 402 of the spray pipe 4 is set as a spray gun for easy powder spraying. In the coal gasification process, the particle size of coal powder is a key parameter, which directly affects the gasification efficiency, equipment performance, and the quality and output of subsequent products. The material used for spraying needs to have a smaller particle size (i.e., the preset particle size) to meet the spraying conditions. Blast furnace bag dry ash is a common carbon-containing solid waste in the steel production process. Blast furnace bag dry ash samples are collected and analyzed to obtain their particle size distribution as shown in the figure. Figure 2 As shown, the particle size of blast furnace bag dry ash is mostly within 300μm, which can basically be used as the raw material for ash spraying. Particles exceeding 300 mesh need to be ground to reduce their particle size. In addition, if it is slag mud, a slag grinder is needed to grind it to within 300 mesh as raw material for powder spraying.

[0035] Optionally, the blowing pipe 4 is a horizontally arranged straight pipe, which is convenient for arrangement and blowing and prevents dust accumulation in the pipe. It can be understood that as an alternative embodiment, the blowing pipe 4 can also be a straight pipe that is inclined downward from the solid waste powder spraying tank 3 to the vaporization cooling flue 5, so as to facilitate the introduction of the preset particle size material into the vaporization cooling flue 5. Figure 1 The arrow in the middle points to the direction of "down".

[0036] In one embodiment, the end of the solid waste treatment system is also connected to a dust removal system, and other impurities after combustion in the vaporization cooling flue 5 enter the subsequent dust removal system and are collected and classified for treatment.

[0037] In one embodiment, the solid waste treatment system further includes: a magnetic separation device 1, which is connected between the feeding device and the grinding mill 2. The magnetic separation device 1 is suitable for receiving solid waste materials and magnetically separating the solid waste materials to separate iron-rich materials and residual materials, and conveying the residual materials to the grinding mill 2. The solid waste materials are magnetically separated and classified by the magnetic separation device 1 to obtain iron-containing iron-rich materials and iron-free residual materials, so as to achieve classified treatment of solid waste. After being collected, the iron-rich materials can be directly returned to sintering and continue to become smelting raw materials, so as to achieve the recycling of iron resources in solid waste. Moreover, the iron-rich materials do not contain harmful substances such as lead and zinc, so as to avoid the problem of cyclic enrichment of harmful substances and damage to equipment life and affect product quality. The iron-free residual materials enter the grinding mill 2 for grinding and subsequent powder spraying and combustion. Through classified treatment and separate utilization of solid waste, the resource utilization of solid waste is achieved and the utilization rate of solid waste is improved. It should be noted that the magnetic separation device is provided with a magnet, which can absorb iron-containing materials, thereby separating the iron-rich materials, and the remaining materials after separation are transported back to the grinding mill 2, that is, the solid waste materials received by the grinding mill 2 are the remaining materials that do not contain iron.

[0038] The composition of blast furnace bag dry ash is shown in Table 1. It can be seen from Table 1 that the blast furnace bag dry ash contains a high amount of Fe (iron) and has a great recycling value.

[0039] Table 1 Blast furnace bag dry ash composition

[0040]

[0041] In one embodiment, the solid waste treatment system further includes: a screening device 6, the screening device 6 is connected between the magnetic separation device 1 and the grinding mill 2, the screening device 6 has a first outlet and a second outlet, the first outlet is directly or indirectly connected to the tank feed port, and the second outlet is connected to the grinding mill 2, the screening device 6 receives the remaining material from the magnetic separation device 1 and screens the remaining material to separate the first material less than or equal to the preset particle size and the second material greater than the preset particle size, the first material is discharged through the first outlet, and the second material is discharged through the second outlet. It should be noted that the particle size of the remaining material output by the magnetic separation device 1 is large and small, among which the material with a particle size less than or equal to the preset particle size meets the spraying requirements and can be directly transported to the solid waste powder spraying tank 3 for use, while the material with a particle size greater than the preset particle size needs to enter the grinding mill 2 for further grinding. By setting a screening device 6 between the magnetic separation device 1 and the grinding mill 2, the screening device 6 screens the remaining material, and divides the remaining material into a first material with a particle size less than or equal to a preset particle size and a second material with a particle size greater than the preset particle size according to the particle size, and then discharges the first material through the first outlet, and discharges the second material through the second outlet, so as to separate the first material and the second material, so that only the second material with a larger particle size needs to be transported to the grinding mill 2 for grinding, and the first material with a particle size that meets the requirements does not need to enter the grinding mill 2 for grinding, which can ensure the effective grinding of the grinding mill 2, which is beneficial to extend the service life of the grinding mill 2, save costs, and improve work efficiency. Among them, the first outlet can be directly connected to the tank body feed port, so as to directly introduce the first material into the solid waste powder spray tank 3; the first outlet can also be first connected to other devices or structures, and then connected to the tank body feed port through other devices or structures, which can also achieve the first material being introduced into the solid waste powder spray tank 3.

[0042] Specifically, a screen is provided in the screening device 6, and the remaining material from the magnetic separation device 1 is screened through the screen. The particles with a particle size less than or equal to the aperture of the screen in the remaining material are the first material, and the particles with a particle size greater than the aperture of the screen are the second material. The first material falls through the holes of the screen to the bottom of the screen and is further discharged from the first outlet for standby use, and the second material is isolated by the screen above the screen and then discharged from the second outlet to the mill 2. Among them, the aperture of the screen is equal to the value of the preset particle size, and the screens of different apertures can be replaced according to actual needs. After the carbon-containing solid waste is magnetically separated by the magnetic separation device 1, the iron-rich resources are recovered and sintered back to form pellets for standby use; the screening device 6 screens the carbon-containing solid waste within 300 mesh, which can be directly used as a carbon source for injection, and the ash above 300 mesh is processed by the mill 2 to within 300 mesh for use.

[0043] In one embodiment, the solid waste treatment system further includes: a particle bin 7, the particle bin 7 is connected to the first outlet of the screening device 6 to store the first material, and the outlet of the particle bin 7 is directly or indirectly connected to the solid waste powder spray tank 3. By setting the particle bin 7 and setting the particle bin 7 to be connected to the first outlet of the screening device 6, the first material derived from the first outlet of the screening device 6 enters the particle bin 7, and the first material is placed in the particle bin 7 for storage and standby, so that the first material can be stored and taken according to demand, which is convenient to use. Among them, the outlet of the particle bin 7 can be directly connected to the solid waste powder spray tank 3 to directly transport the first material to the solid waste powder spray tank 3; the outlet of the particle bin 7 can also be first connected to other containers, and then indirectly connected to the solid waste powder spray tank 3 via other containers, which can also realize the first material being transported to the solid waste powder spray tank 3.

[0044] In one embodiment, the solid waste treatment system also includes: a finished powder bin 8, which is connected between the grinding mill 2 and the solid waste powder spray tank 3, and has a first powder bin inlet, a second powder bin inlet and a powder bin outlet. The first powder bin inlet is connected to the outlet of the particle bin 7, the second powder bin inlet is connected to the outlet of the grinding mill 2, and the powder bin outlet is connected to the tank body feed port of the solid waste powder spray tank 3. By setting a finished powder bin 8 between the grinding mill 2 and the solid waste powder spraying tank 3, the first powder bin entrance of the finished powder bin 8 is connected with the outlet of the particle bin 7, so that the first material in the particle bin 7 can be introduced into the finished powder bin 8, and the second powder bin entrance of the finished powder bin 8 is connected with the outlet of the grinding mill 2, so that the second material ground by the grinding mill 2 can be introduced into the finished powder bin 8. The materials exported through the particle bin 7 and the grinding mill 2 are all materials of preset particle size that meet the requirements of spraying. The finished powder bin 8 can realize the collection of the first material and the second material. The finished powder bin 8 is used as a transfer bin to store the preset particle size materials to be entered into the solid waste powder spraying tank 3, which is convenient for use. A tank body feed port is opened on the solid waste powder spraying tank 3 to connect with the finished powder bin 8, which can reduce the number of tank body feed ports, simplify the structure, and facilitate installation.

[0045] Preferably, the outlet of the particle bin 7 is connected to the first powder bin entrance of the finished powder bin 8 by a pipe, and the first powder bin entrance of the finished powder bin 8 is located below the outlet of the particle bin 7, and in the direction from the particle bin 7 to the finished powder bin 8, the pipe between the particle bin 7 and the finished powder bin 8 is inclined downward, so as to facilitate the first material in the particle bin 7 to be introduced into the finished powder bin 8; the outlet of the grinding mill 2 is connected to the second powder bin entrance of the finished powder bin 8 by a pipe, and the first powder bin entrance of the finished powder bin 8 is located below the outlet of the grinding mill 2, and in the direction from the grinding mill 2 to the finished powder bin 8, the pipe between the grinding mill 2 and the finished powder bin 8 is inclined downward, so as to facilitate the second material in the grinding mill 2 to be introduced into the finished powder bin 8.

[0046] In one embodiment, the solid waste powder spray tank 3 is a sealed tank, the tank body feed port is sealed and connected to the powder bin outlet through the first closed pipe 11, and the tank body discharge port is sealed and connected to the injection feed port 403. By setting the solid waste powder spray tank 3 as a sealed tank, the first closed pipe 11 delivers the preset particle size material in the finished powder bin 8 into the solid waste powder spray tank 3, which can play a role in isolating the air, avoiding too much oxygen from mixing into the powder, preventing explosion, and thus improving safety. Among them, the tank body feed port is located below the powder bin outlet, and in the direction from the finished powder bin 8 toward the solid waste powder spray tank 3, the first closed pipe 11 is inclined downward, so as to facilitate the introduction of the preset particle size material in the finished powder bin 8 into the solid waste powder spray tank 3.

[0047] In one embodiment, the solid waste powder spraying tank 3 is located above the spraying pipe 4, and the tank body discharge port is located at the lower end of the solid waste powder spraying tank 3, and the tank body discharge port is connected to the spraying feed port 403 through a pipeline. Figure 1 The middle arrow points to the direction of "up"; the lower end refers to the direction along Figure 1 The end in the direction of "down" indicated by the middle arrow. By setting the tank body discharge port at the lower end of the solid waste powder spray tank 3, it is convenient for the material in the solid waste powder spray tank 3 to flow out under the action of gravity, and by setting the solid waste powder spray tank 3 above the spray pipe 4, the material discharged from the tank body discharge port can directly enter the spray pipe 4, which is convenient to use and has a good material discharge effect.

[0048] In addition, in other embodiments, the blowing feed port 403 may be set to open upward, and the tank body discharge port may be directly connected to the blowing feed port 403. The tank body discharge port located at the lower end of the solid waste powder spray tank 3 opens downward, and by setting the blowing feed port 403 as an upward opening, and arranging the solid waste powder spray tank 3 above the blowing pipe 4, the tank body discharge port opening downward is opposite to the blowing feed port 403 opening upward, so that the tank body discharge port and the blowing feed port 403 are directly connected, thereby realizing the connection between the solid waste powder spray tank 3 and the blowing pipe 4, reducing the use of parts such as connecting pipes, facilitating operation, low cost and good sealing effect.

[0049] In one embodiment, the solid waste treatment system further includes: a discharge valve, which is arranged on the pipeline between the tank discharge port and the blowing feed port 403. By arranging the discharge valve on the pipeline between the tank discharge port of the solid waste powder spray tank 3 and the blowing feed port 403 of the blowing pipe 4, the opening and closing of the discharge valve can control the on-off of the pipeline, thereby controlling whether the solid waste powder spray tank 3 conveys materials to the blowing pipe 4. Further, the discharge speed can be controlled by controlling the opening degree of the discharge valve, which is convenient for adjustment and control according to actual needs and easy to operate.

[0050] In one embodiment, the solid waste treatment system further includes: an air intake valve, which is arranged on the blowing pipe 4 at a position close to the air inlet 401 to control the on-off and flow rate of the inert gas. By arranging the air intake valve at a position close to the air inlet 401 on the blowing pipe 4, the opening and closing of the air inlet 401 is controlled by the opening and closing of the air intake valve, thereby realizing the control of the on-off of the inert gas. Furthermore, the amount of air intake can be controlled by controlling the opening degree of the air intake valve to realize the control of the flow rate of the inert gas, so that the air intake valve can be adjusted according to actual needs to realize the control of the on-off and flow rate of the inert gas. Preferably, the inert gas is N2 (nitrogen).

[0051] Specifically, during oxygen blowing smelting in the converter, the air inlet valve and the discharge valve are opened, and the gas flow rate and the discharge speed are adjusted by adjusting the opening degree of the air inlet valve and the discharge valve, so as to adjust the appropriate speed for spraying carbon-containing solid waste.

[0052] In one embodiment, the feeding device includes: a raw material bin 9 and a vacuum tanker 10. The raw material bin 9 is arranged upstream of the magnetic separation device 1. The raw material bin 9 is suitable for containing solid waste materials. The bin outlet of the raw material bin 9 is connected with the magnetic separation device 1 to convey the solid waste materials to the magnetic separation device 1; the vacuum tanker 10 is connected with the raw material bin 9 to convey the solid waste materials into the raw material bin 9. By setting up the raw material bin 9, the solid waste materials can be contained, which is convenient for the storage and use of the solid waste materials. The outlet of the raw material bin 9 is connected with the magnetic separation device 1 to convey the solid waste materials to the magnetic separation device 1; the solid waste materials are transported to the factory by the vacuum tanker 10, and the solid waste materials are conveyed to the raw material bin 9 by the vacuum tanker 10, which is convenient for the transportation of solid waste materials, without being restricted by distance, and convenient for transportation.

[0053] In one embodiment, the raw material bin 9 is a sealed bin, and the raw material bin 9 has a bin entrance, which is connected to the vacuum tanker 10 through a second closed pipe 12. By setting the raw material bin 9 as a sealed bin, when in use, the bin entrance of the raw material bin 9 is opened and the bin entrance is connected to the vacuum tanker 10 through the second closed pipe 12, and the vacuum tanker 10 transports the solid waste materials through the second closed pipe 12 to the closed raw material bin 9 by pneumatic force, ensuring that the solid waste materials such as dust removal ash do not overflow during the entry process, thereby avoiding pollution of the surrounding environment.

[0054] The solid waste treatment system of this embodiment is used for the pretreatment of carbon-containing solid waste, such as dust, slag, dust and mud, etc. in steel enterprises. The solid waste treatment system uses a magnetic separation device 1 to magnetically separate solid waste materials, recovers iron elements, and then processes and grinds the iron-free carbon-containing residual materials into particles suitable for injection and injects them into the vaporization cooling flue for combustion, turning solid waste into resources, realizing the resource utilization of solid waste through classification, processing and collection, and effectively utilizing solid waste, alleviating the problem of heavy metal enrichment caused by the recycling of solid waste in the prior art, and reducing damage to equipment.

[0055] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A solid waste treatment system, characterized in that: include: A feeding device, adapted to provide solid waste material; A grinding machine (2), located downstream of the feeding device, adapted to receive the solid waste material and grind the solid waste material to a preset particle size to obtain a material with a preset particle size; A solid waste powder spraying tank (3) is located downstream of the grinding mill (2), and the solid waste powder spraying tank (3) has a tank body feed port and a tank body discharge port, and the tank body feed port is suitable for introducing the material with a preset particle size into the solid waste powder spraying tank (3); A blowing pipe (4) having an air inlet (401), an air outlet (402) and a blowing feed port (403); the blowing feed port (403) is provided on a pipeline between the air inlet (401) and the air outlet (402); the blowing feed port (403) is connected to the tank body outlet so as to introduce the material with the preset particle size in the solid waste powder spray tank (3) into the blowing pipe (4); the air inlet (401) is suitable for introducing an inert gas with a preset flow rate into the blowing pipe (4); The vaporization cooling flue (5) is in communication with the gas outlet (402) of the injection pipe (4), and the material with the preset particle size is injected into the vaporization cooling flue (5) through the gas outlet (402) for combustion.

2. The solid waste treatment system according to claim 1, characterized in that: The solid waste treatment system further comprises: a magnetic separation device (1), wherein the magnetic separation device (1) is connected between the feeding device and the grinding mill (2), wherein the magnetic separation device (1) is suitable for receiving the solid waste material and performing magnetic separation on the solid waste material to separate the iron-rich material and the remaining material, and wherein the magnetic separation device (1) is suitable for conveying the remaining material to the grinding mill (2).

3. The solid waste treatment system according to claim 2, characterized in that: The solid waste treatment system further comprises: a screening device (6), wherein the screening device (6) is connected between the magnetic separation device (1) and the grinding mill (2), and the screening device (6) has a first outlet and a second outlet, wherein the first outlet is directly or indirectly connected to the feed port of the tank body, and the second outlet is connected to the grinding mill (2), wherein the screening device (6) receives the remaining material from the magnetic separation device (1) and screens the remaining material to separate a first material having a particle size less than or equal to a preset particle size and a second material having a particle size greater than the preset particle size, wherein the first material is discharged through the first outlet, and the second material is discharged through the second outlet.

4. The solid waste treatment system according to claim 3, characterized in that: The solid waste treatment system further comprises: a particle bin (7), the particle bin (7) being connected to the first outlet of the screening device (6) to store the first material, and the outlet of the particle bin (7) being directly or indirectly connected to the solid waste powder spray tank (3).

5. The solid waste treatment system according to claim 4, characterized in that: The solid waste treatment system further comprises: a finished powder bin (8), the finished powder bin (8) being connected between the grinding mill (2) and the solid waste powder spraying tank (3), the finished powder bin (8) having a first powder bin inlet, a second powder bin inlet and a powder bin outlet, the first powder bin inlet being connected to the outlet of the particle bin (7), the second powder bin inlet being connected to the outlet of the grinding mill (2), and the powder bin outlet being connected to the tank body feed port of the solid waste powder spraying tank (3).

6. The solid waste treatment system according to claim 5, characterized in that: The solid waste powder spray tank (3) is a sealed tank, the tank body feed port is sealedly connected to the powder bin outlet via a first sealed pipe (11), and the tank body discharge port is sealedly connected to the spray feed port (403).

7. The solid waste treatment system according to claim 6, characterized in that: The solid waste powder spray tank (3) is located above the spray pipe (4), the tank body discharge port is located at the lower end of the solid waste powder spray tank (3), and the tank body discharge port is connected to the spray feed port (403) through a pipeline.

8. The solid waste treatment system according to claim 7, characterized in that: The solid waste treatment system further comprises: a discharge valve, which is arranged on a pipeline between the tank body discharge port and the injection feed port (403).

9. The solid waste treatment system according to any one of claims 2 to 7, characterized in that: The solid waste treatment system further comprises: an air intake valve, the air intake valve being arranged on the blowing pipe (4) at a position close to the air intake port (401) to control the opening and closing of the blowing pipe (4) and the flow rate of the inert gas; And / or, the feeding device comprises: a raw material bin (9), arranged upstream of the magnetic separation device (1), the raw material bin (9) being suitable for containing the solid waste material, the bin outlet of the raw material bin (9) being connected to the magnetic separation device (1) so as to transport the solid waste material to the magnetic separation device (1); and a vacuum tank truck (10), connected to the raw material bin (9) so as to transport the solid waste material into the raw material bin (9).

10. The solid waste treatment system according to claim 9, characterized in that: The raw material bin (9) is a sealed bin, and has a bin inlet, which is connected to the vacuum tank truck (10) via a second sealed pipeline (12).

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