Garbage incineration fly ash granulation system

Abstract

The invention discloses a waste incineration fly ash granulation system, and relates to the technical field of waste incineration fly ash treatment. The waste incineration fly ash granulation system comprises a raw material preparation device, a material mixing device, a weighing temporary storage device and a granulation device which are sequentially arranged from top to bottom and communicate with one another, the granulation device is provided with a medicine spraying device used for spraying diluted medicine liquid into an inner cavity of the granulation device, and a discharging opening of the granulation device communicates with a feeding opening of a material screening device; and a qualified semi-finished product discharge hole of the screening device is communicated with the constant-temperature and constant-humidity curing device. Through the synergistic effect of all the devices, the fly ash granulation product meeting the quality standard can be produced, the fly ash granulation production efficiency is greatly improved, compared with a traditional treatment mode, the amount of fly ash capable of being treated in unit time is remarkably increased, the problem that large-scale application of fly ash recycling treatment is difficult is effectively solved, and the economic benefit is improved. And the current ever-increasing waste incineration fly ash treatment requirement can be better met.

Description

Technical Field

[0001] This application relates to the technical field of municipal solid waste incineration fly ash treatment, and particularly relates to a granulation system for municipal solid waste incineration fly ash. Background Art

[0002] As a widely used method for domestic waste treatment, municipal solid waste incineration power generation generates a large amount of fly ash while achieving waste reduction and energy recovery. Fly ash contains various heavy metals, persistent organic pollutants such as dioxins, and a large amount of soluble chlorides. If these fly ashes are not properly treated and enter the environment, a series of serious secondary pollution problems will be caused.

[0003] In recent years, the treatment of fly ash has gradually shifted from traditional simple disposal methods such as landfilling to resource utilization. Geopolymer is an inorganic polymer material. Through alkali activation, a three-dimensional network-like zeolite cage-like three-dimensional structure can be formed. This structure can effectively solidify heavy metal ions and chloride ions in fly ash inside it, thereby realizing the stabilization and harmless treatment of harmful substances in fly ash.

[0004] However, most current studies mainly focus on the solidification effect of geopolymers on fly ash, and relatively few studies have been conducted on how to use fly ash as a raw material to prepare geopolymers and apply them on a large scale in industrial production. For example, the invention patent with the publication number CN119100632A discloses a municipal solid waste incineration fly ash-based geopolymer and its preparation method. However, this preparation method lacks an efficient and stable device to realize the large-scale production of fly ash-based geopolymers, which limits the large-scale application of fly ash resource disposal and is difficult to meet the current growing demand for municipal solid waste incineration fly ash treatment. Summary of the Invention

[0005] The purpose of this application is to provide a granulation system for municipal solid waste incineration fly ash to solve the problems of low efficiency of fly ash resource disposal and difficulty in large-scale application.

[0006] The technical solution adopted by this application to solve its technical problems is:

[0007] A granulation system for municipal solid waste incineration fly ash includes a raw material preparation device, a mixing device, a weighing and buffering device, and a granulation device that are sequentially arranged and connected from top to bottom. A spraying device for spraying diluted liquid medicine into its inner cavity is provided on the granulation device. The discharge port of the granulation device is connected to the feed port of a screening device, and the qualified semi-finished product discharge port of the screening device is connected to a constant temperature and humidity curing device.

[0008] Further, the raw material preparation device includes a weighing bin disposed above and communicating with the mixing device, and at least two raw material bins disposed above the weighing bin. The bottom of each raw material bin communicates with the top of the weighing bin through a raw material bin screw conveyor.

[0009] Further, the weighing and buffering device includes a weighing and buffering bin and a buffer bin screw conveyor. The top of the weighing and buffering bin communicates with the discharge port of the mixing device, and the bottom of the weighing and buffering bin communicates with the feed port of the granulating device through the buffer bin screw conveyor.

[0010] Further, the screening device is provided with an unqualified semi-finished product discharge port, and the unqualified semi-finished product discharge port communicates with the return material port of the granulating device through a first elevator.

[0011] Further, the constant temperature and humidity curing device includes a curing chamber, a paving and conveying assembly disposed in the curing chamber, a temperature and humidity monitoring assembly for detecting the temperature and humidity in the curing chamber, a temperature regulating assembly for regulating the temperature in the curing chamber, and a humidity regulating assembly for regulating the humidity in the curing chamber. The curing chamber is provided with a collecting and distributing assembly for communicating the qualified semi-finished product discharge port with the feed end of the paving and conveying assembly and a discharge assembly for communicating with the discharge end of the paving and conveying assembly.

[0012] Further, the paving and conveying assembly includes at least two belt conveyors arranged at intervals from top to bottom. The conveying directions of any two adjacent belt conveyors are opposite, and a receiving baffle extending obliquely upward to the outside of the discharge end of the upper belt conveyor is provided at the feed end of each belt conveyor.

[0013] Further, the paving and conveying assembly further includes a material level detection assembly disposed adjacent to the discharge end of the lowermost belt conveyor.

[0014] Further, the paving and conveying assembly further includes a material terminal mechanism disposed above the discharge end of the lowermost belt conveyor, and the material terminal mechanism can open and close the discharge end of the belt conveyor.

[0015] Further, the collecting and distributing assembly includes a semi-finished product collecting pipe, a scraper type discharge machine and a distributing pipe. A semi-finished product feed port is provided on the top wall of the curing chamber. The upper end of the semi-finished product collecting pipe communicates with the qualified semi-finished product discharge port, the lower end of the semi-finished product collecting pipe communicates with the semi-finished product feed port through the scraper type discharge machine, and the semi-finished product feed port communicates with the feed end of the paving and conveying assembly through the distributing pipe.

[0016] Further, the cloth tube extends obliquely downward along the conveying direction of the material laying and conveying assembly. The width of the inner cavity of the cloth tube gradually increases from top to bottom, and the height of the inner cavity of the cloth tube gradually decreases from top to bottom.

[0017] Advantages of the present application:

[0018] The waste incineration fly ash granulation system provided by the embodiment of the present application can accurately proportion fly ash and other required raw materials by using the raw material preparation device to ensure the smooth progress of subsequent reactions. The mixing device can fully mix the raw materials evenly to provide a material basis with consistent quality for the granulation process. The weighing and buffering device can accurately control the feeding amount of the mixed materials to avoid production interruption or product quality fluctuations caused by uneven supply of the mixed materials. The spraying device equipped on the granulation device can accurately spray the diluted liquid medicine into the inner cavity, so that the diluted liquid medicine can fully contact and react with the mixed materials, thereby better realizing the solidification and stabilization of harmful substances in the fly ash. The granulation device granulates the materials to form particulate matter, and the screening device screens the particulate matter to screen out semi-finished particles with qualified sizes. The constant temperature and humidity curing device cures the semi-finished particles with qualified sizes to further improve the quality stability of the fly ash granulation products. Through the synergistic effect of each device, the present application can not only produce fly ash granulation products that meet the quality standards, but also greatly improve the production efficiency of fly ash granulation. Compared with the traditional treatment method, the amount of fly ash that can be processed per unit time is significantly increased, effectively solving the problem that the resource-based treatment of fly ash is difficult to be applied on a large scale, and enabling it to better meet the current growing demand for fly ash treatment. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of the waste incineration fly ash granulation system provided by the embodiment of the present application;

[0021] Figure 2 is a schematic structural diagram of the raw material preparation device;

[0022] Figure 3 is a schematic structural diagram of the connection between the weighing and buffering device and the granulation device;

[0023] Figure 4 is a schematic structural diagram of the constant temperature and humidity curing device;

[0024] Figure 5It is a schematic structural diagram of a material laying and conveying assembly;

[0025] Figure 6 It is a schematic structural diagram of a material level detection assembly and a material terminal mechanism;

[0026] Figure 7 It is a schematic structural diagram of a material collecting and distributing assembly;

[0027] Figure 8 It is a schematic structural diagram of a discharging assembly;

[0028] Figure 9 It is a schematic structural diagram of a temperature regulation assembly;

[0029] Figure 10 It is a schematic structural diagram of a humidity regulation assembly.

[0030] Reference numerals:

[0031] 1 - Raw material preparation device; 11 - Raw material bin; 12 - Raw material bin screw conveyor; 13 - Weighing bin; 14 - First pneumatic discharging valve; 15 - Second pneumatic discharging valve; 16 - Third pneumatic discharging valve;

[0032] 2 - Mixing device; 3 - Weighing and buffering device; 31 - Weighing and buffering bin; 311 - Bin wall vibrator; 32 - Buffer bin screw conveyor; 33 - Fourth pneumatic discharging valve; 34 - Fifth pneumatic discharging valve;

[0033] 4 - Pelletizing device; 5 - Spraying device; 6 - Screening device; 61 - Qualified semi - finished product discharging port; 62 - Unqualified semi - finished product discharging port;

[0034] 7 - Constant temperature and humidity curing device; 71 - Curing bin; 711 - Semi - finished product inlet; 712 - Finished product discharging port; 72 - Material laying and conveying assembly; 721 - Belt conveyor; 7211 - Conveyor belt; 7212 - Driving roller; 7213 - Redirecting roller; 7214 - Idler roller; 722 - Receiving baffle; 723 - Material level detection assembly; 7231 - Detection frame; 7232 - Material level induction probe; 724 - Material terminal mechanism;

[0035] 73 - Temperature and humidity monitoring assembly; 731 - Temperature transmitter; 732 - Humidity and dryness transmitter; 74 - Temperature regulation assembly; 741 - Steam heat exchange hot air blower; 742 - Air outlet pipe; 743 - Air inlet pipe; 744 - Exhaust fan; 745 - Steam regulating valve;

[0036] 75 - Humidity regulation assembly; 751 - Humidity - maintaining liquid pressure tank; 7511 - Humidity - maintaining liquid supply pipe; 7512 - Atomizing and pressurizing air inlet pipe; 752 - Delivery pipe; 753 - Spray pipe; 754 - Regulating valve; 755 - Atomizing nozzle; 756 - Exhaust fan;

[0037] 76 - Fabric assembly; 761 - Semi - finished product aggregate pipe; 762 - Scraper type discharging machine; 763 - Cloth pipe; 764 - Sight glass; 77 - Discharging assembly; 771 - Finished product aggregate hopper; 772 - Discharge door; 773 - Discharge port guiding slide plate;

[0038] 8 - First elevator; 9 - Second elevator. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0040] In the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. Without special instructions, in the case of meeting the relative positional relationship shown in the drawings, the above - mentioned orientation description can be flexibly set during the actual application process.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood according to specific situations.

[0042] See Figure 1 , the embodiment of the present application provides a waste incineration fly ash granulation system, which includes a raw material preparation device 1, a mixing device 2, a weighing and buffering device 3, and a granulation device 4 that are sequentially arranged and connected from top to bottom. A spraying device 5 for spraying a dilution liquid medicine into the inner cavity is provided on the granulation device 4. The discharge port of the granulation device 4 is communicated with the feed port of a screening device 6, and the qualified semi - finished product discharge port 61 of the screening device 6 is communicated with a constant temperature and humidity curing device 7.

[0043] See Figure 1, the raw material preparation device 1 is mainly used to accurately proportion fly ash and auxiliary materials, and feed the fly ash and auxiliary materials into the mixing device 2 in a quantitative manner to ensure the smooth progress of subsequent reactions. The mixing device 2 is arranged below the raw material preparation device 1 and is used to receive the fly ash and auxiliary materials prepared by the raw material preparation device 1, and fully mix the fly ash and auxiliary materials evenly to provide a material basis with consistent quality for the subsequent granulation process. The weighing and buffering device 3 is arranged below the mixing device 2 and is used to receive the mixed materials in the mixing device 2 to accurately control the dosing amount of the mixed materials and avoid production interruption or product quality fluctuations caused by uneven supply of the mixed materials. The granulation device 4 is arranged below the weighing and buffering device 3 and is used to receive the mixed materials in the weighing and buffering device 3. Through the spraying device 5, the diluted liquid medicine can be accurately sprayed into the inner cavity of the granulation device 4, which can not only adjust the humidity of the mixed materials, but also make the mixed materials and the diluted liquid medicine be mixed and react in proportion to generate geopolymers gel, so as to realize the solidification and stabilization of harmful substances in the fly ash, and then make the geopolymers gel into particles through granulation. The particles manufactured by the granulation device 4 are called semi-finished fly ash particles, because these particles usually contain free moisture and volatile substances that have not reacted completely, and are prone to cause material cracking or surface pulverization under environmental exposure conditions. Therefore, these particles are not the final finished products. The screening device 6 is used to receive the semi-finished fly ash particles manufactured by the granulation device 4 and screen them to screen out the semi-finished fly ash particles with qualified sizes. The semi-finished fly ash particles with qualified sizes are sent into the constant temperature and humidity curing device 7 through the semi-finished product discharge port 61 for curing under the conditions of constant temperature and humidity to further improve the quality stability of the fly ash particles, and the finished fly ash particles are obtained after the curing is completed.

[0044] In some embodiments, referring to Figure 2 , the raw material preparation device 1 includes a weighing bin 13 arranged above and communicated with the mixing device 2 and at least two raw material bins 11 arranged above the weighing bin 13. The bottom of each raw material bin 11 is communicated with the top of the weighing bin 13 through a raw material bin screw conveyor 12.

[0045] There can be two raw material bins 11. One of the raw material bins 11 is a fly ash bin for storing fly ash, and the other raw material bin 11 is an auxiliary material bin for storing auxiliary materials. Among them, the fly ash can be sent into the fly ash bin through a pneumatic conveying pipeline, and the auxiliary materials can be pumped to the auxiliary material bin through a vacuum pipeline. Since the auxiliary materials are prepared from at least two raw materials, the raw material bin 11 can also be three or more. One of the raw material bins 11 is used to store fly ash, and the other raw material bins 11 are respectively used to store the raw materials for preparing the auxiliary materials.

[0046] The bottom of the raw material bin 11 has a discharge port, which is communicated with the feed port of the raw material bin screw conveyor 12. A first pneumatic discharge valve 14 can be arranged between the two. The first pneumatic discharge valve 14 is used to control the quantity of the raw materials in the raw material bin 11 falling into the raw material bin screw conveyor 12, so as to avoid overloading when the raw material bin screw conveyor 12 is running. A second pneumatic discharge valve 15 is installed at the discharge port of the raw material bin screw conveyor 12. The second pneumatic discharge valve 15 is communicated with the feed port at the top of the weighing bin 13 through a hose. The weighing bin 13 is used to weigh the materials therein. The bottom of the weighing bin 13 has a discharge port, and a third pneumatic discharge valve 16 is installed at the discharge port at the bottom of the weighing bin 13.

[0047] In some embodiments, referring to Figure 1 , Figure 3 , the mixing device 2 adopts a non-dead-angle mixer. The weighing and buffering device 3 includes a weighing and buffering bin 31 and a buffering bin screw conveyor 32. The top of the weighing and buffering bin 31 is communicated with the discharge port of the mixing device 2, and the bottom of the weighing and buffering bin 31 is communicated with the feed port of the granulating device 4 through the buffering bin screw conveyor 32.

[0048] Specifically, a dust-free automatic connection valve is used to dock between the feed port of the non-dead-angle mixer and the discharge port at the bottom of the weighing bin 13, and a dust-free automatic connection valve is also used to dock between the discharge port of the non-dead-angle mixer and the feed port at the top of the weighing and buffering bin 31. The weighing and buffering bin 31 is used to weigh the materials buffered therein. The bottom of the weighing and buffering bin 31 is provided with a discharge port, which is communicated with the feed port of the buffering bin screw conveyor 32. A fourth pneumatic discharge valve 33 can be arranged between the two. The fourth pneumatic discharge valve 33 is used to control the quantity of the raw materials in the weighing and buffering bin 31 falling into the buffering bin screw conveyor 32, so as to avoid overloading when the buffering bin screw conveyor 32 is running. A bin wall vibrator 311 can be arranged on the bin wall of the weighing and buffering bin 31. The bin wall vibrator 311 can vibrate the bin wall of the weighing and buffering bin 31 during discharging to avoid the materials sticking to the bin wall and causing unsmooth discharging. A fifth pneumatic discharge valve 34 is installed at the discharge port of the buffering bin screw conveyor 32. The fifth pneumatic discharge valve 34 is communicated with the feed port of the granulating device 4 through a pipeline.

[0049] In some embodiments, the granulating device 4 can adopt an existing pan granulator. The spraying device 5 is used to spray the diluted liquid medicine into the pan granulator so that the diluted liquid medicine is sprayed on the mixed materials. During use, the diluted liquid medicine can be sent into the spraying device 5 by using a liquid medicine metering pump and sprayed into the pan granulator through the spraying device 5. Specifically, the spraying device 5 can include a spraying pipe arranged in the pan granulator, nozzles arranged on the spraying pipe. One end of the spraying pipe extends to the outside of the pan granulator and is communicated with a regulating valve. The regulating valve is communicated with the liquid medicine metering pump through a pipeline, and the liquid medicine metering pump is communicated with the liquid medicine storage device.

[0050] In some embodiments, referring to Figure 1 , the screening device 6 can adopt a drum screening machine. The screening device 6 is provided with an unqualified semi-finished product discharge port 62, and the unqualified semi-finished product discharge port 62 is communicated with the return material port of the granulation device 4 through a first elevator 8. Correspondingly, the first elevator 8 can be used to send the semi-finished fly ash particles with unqualified sizes into the granulation device 4 for reuse and re-granulation, improving the utilization rate of raw materials.

[0051] The height of the discharge port of the granulation device 4 can be higher than the height of the feed port of the screening device 6. This layout can adopt a pipe extending from top to bottom to communicate the discharge port of the granulation device 4 with the feed port of the screening device 6. The semi-finished fly ash particles manufactured by the granulation device 4 can fall on the feed port of the screening device 6 under the action of gravity.

[0052] The height of the discharge port of the granulation device 4 can also be lower than the height of the feed port of the screening device 6. This layout can adopt a second elevator 9 to communicate the discharge port of the granulation device 4 with the feed port of the screening device 6. The semi-finished fly ash particles manufactured by the granulation device 4 can enter the feed port of the screening device 6 under the transportation of the second elevator 9.

[0053] Referring to Figure 1 , Figure 2 , Figure 3 , the working process of the waste incineration fly ash granulation system provided by the embodiment of the present application is as follows:

[0054] S1. The raw material bin 11 includes two. The right one is the fly ash bin, and the left one is the auxiliary material bin. A certain amount of fly ash is transported and stored in the right raw material bin 11, and a certain amount of auxiliary materials is transported and stored in the left raw material bin 11.

[0055] S2. Open the first pneumatic discharge valve 14 on the right, open the raw material bin screw conveyor 12 on the right, open the second pneumatic discharge valve 15 on the right, so that the fly ash is transported by the raw material bin screw conveyor 12 on the right to the weighing bin 13. When the set quantity is reached, simultaneously close the first pneumatic discharge valve 14, the raw material bin screw conveyor 12 on the right, and the second pneumatic discharge valve 15 on the right. Open the dust-free automatic connection valve, dock the discharge port of the weighing bin 13 with the feed port of the mixing device 2, open the third pneumatic discharge valve 16, and transport all the fly ash in the weighing bin 13 to the dead-angle-free mixer. Then close the dust-free automatic connection valve, disconnect the discharge port of the weighing bin 13 from the feed port of the mixing device 2, and simultaneously close the third pneumatic discharge valve 16.

[0056] S3. Open the first pneumatic discharging valve 14 on the left side, start the raw material bin screw conveyor 12 on the left side, and open the second pneumatic discharging valve 15 on the left side, so that the auxiliary materials are conveyed by the raw material bin screw conveyor 12 on the left side to the weighing bin 13. When the set quantity is reached, simultaneously close the first pneumatic discharging valve 14, the raw material bin screw conveyor 12, and the second pneumatic discharging valve 15 on the left side. Open the dust-free automatic connection valve, connect the discharging port of the weighing bin 13 with the feeding port of the mixing device 2, open the third pneumatic discharging valve 16, and convey all the auxiliary materials in the weighing bin 13 to the mixing device 2. Then close the dust-free automatic connection valve, disconnect the discharging port of the weighing bin 13 from the feeding port of the mixing device 2, and simultaneously close the third pneumatic discharging valve 16.

[0057] S4. After the fly ash and the auxiliary materials are conveyed to the mixing device 2 according to the ratio, start the mixing device 2 to mix the fly ash and the auxiliary materials. After the set timing for ensuring the full mixing of the fly ash and the auxiliary materials is completed, turn off the mixing device 2.

[0058] S5. Open the dust-free automatic connection valve, connect the discharging port of the mixing device 2 with the feeding port of the weighing buffer bin 31, open the discharging valve at the discharging port of the mixing device 2, and convey the mixed materials into the weighing buffer bin 31. When the weighing reaches the set value, close the discharging valve at the discharging port of the mixing device 2.

[0059] S6. Open the fourth pneumatic discharging valve, start the buffer bin screw conveyor, and open the fifth pneumatic discharging valve, and slowly send the mixed materials into the granulating device 4. After all the mixed materials are sent into the granulating device 4, close the fourth pneumatic discharging valve, close the buffer bin screw conveyor, close the fifth pneumatic discharging valve, open the spraying device 5, and spray a predetermined amount of diluted medicament into the granulating device 4, so that the diluted medicament is mixed with the mixed materials during the granulation process. After reaching the standard, turn off the spraying device 5 and start the granulating device 4 for granulation.

[0060] S7. Start the second elevator 9, start the screening device 6, start the first elevator 8. The second elevator 9 sends the semi-finished fly ash particles into the screening device 6, and the screening device 6 is used to screen the semi-finished fly ash particles; the fine semi-finished fly ash particles with an outer diameter less than 5 mm enter the unqualified semi-finished product discharging port 62 and are sent into the granulating device 4 for recycling and re-granulation through the second elevator 9. The semi-finished fly ash particles with an outer diameter greater than 5 mm and less than 8 mm enter the qualified semi-finished product discharging port 61, and the semi-finished fly ash particles with an outer diameter greater than 8 mm can be recycled or otherwise processed.

[0061] S8. Start the constant temperature and humidity curing device, send the finished fly ash particles in the qualified semi-finished product discharging port 61 into the constant temperature and humidity curing device for curing, maintain the temperature inside at 60 °C and the humidity inside at 95%; after the curing is completed, the fly ash can be removed from the constant temperature and humidity curing device.

[0062] The fly ash granulation system provided by the embodiments of the present application, through the coordinated action of each device, can not only produce fly ash granulation products that meet the quality standards, but also greatly improve the production efficiency of fly ash granulation. Compared with the traditional treatment method, the amount of fly ash that can be processed per unit time is significantly increased, effectively solving the problem that it is difficult to scale up the resource utilization of fly ash, enabling it to better meet the current growing demand for fly ash treatment from waste incineration.

[0063] In some embodiments, referring to Figure 4 , the constant temperature and humidity curing device 7 includes a curing chamber 71, a material laying and conveying assembly 72 arranged in the curing chamber 71, a temperature and humidity monitoring assembly 73 for detecting the temperature and humidity in the curing chamber 71, a temperature adjustment assembly 74 for adjusting the temperature in the curing chamber 71, and a humidity adjustment assembly 75 for adjusting the humidity in the curing chamber 71. A material collecting and distributing assembly 76 communicating the qualified semi-finished product discharge port 61 with the feeding end of the material laying and conveying assembly 72 and a discharge assembly 77 communicating with the discharging end of the material laying and conveying assembly 72 are provided on the curing chamber 71.

[0064] The curing chamber 71 is a relatively enclosed space for providing a stable curing environment for the semi-finished fly ash particles. Exemplarily, the curing chamber 71 has a cuboid structure and can be made of steel. Of course, the curing chamber 71 can also be of other shapes and can be made of other materials, and no specific limitations are made here. Legs or supports for supporting it can be provided at the bottom of the curing chamber 71. A number of observation holes that can be opened and closed can also be provided around the curing chamber 71. Operators can open the observation holes to observe the material laying and curing conditions of the semi-finished fly ash particles in the curing chamber 71. Of course, transparent observation windows can also be provided around the curing chamber 71, and operators can directly observe the material laying and curing conditions of the semi-finished fly ash particles in the curing chamber 71 through the observation windows.

[0065] The material laying and conveying assembly 72 is installed in the curing chamber 71. It can not only evenly lay the semi-finished fly ash particles at the designated position in the curing chamber 71, ensure that the fly ash particles in the curing chamber 71 can be cured under the same temperature and humidity conditions, and guarantee the consistency of the curing quality of the fly ash particles, but also convey the finished fly ash particles to the discharge assembly 77 after curing, facilitating subsequent treatment and utilization.

[0066] The temperature and humidity monitoring assembly 73 is used to collect the temperature and humidity data in the curing chamber 71 in real time to detect the temperature and humidity in the curing chamber 71. The temperature adjustment assembly 74 is used to adjust the temperature in the curing chamber 71 so that the temperature in the curing chamber 71 is maintained within the preset curing temperature range. The humidity adjustment assembly 75 is used to adjust the humidity in the curing chamber 71 so that the humidity in the curing chamber 71 is maintained within the preset curing humidity range.

[0067] The aggregate cloth component 76 is installed on the top wall of the curing chamber 71 and is used to collect the semi-finished fly ash particles that meet the size requirements and enter the qualified semi-finished product discharge port 61. After a certain amount of semi-finished fly ash particles is reached, they are fed into the feeding end of the paving and conveying component 72 in the curing chamber 71 according to a certain rule, so as to avoid the intermittent semi-finished fly ash particles on the paving and conveying component 72 from reducing the efficiency, and at the same time, the idling of the paving and conveying component 72 can also be avoided. The discharging component 77 is installed at the bottom of the side wall of the curing chamber 71 and is used to remove the finished fly ash particles after curing from the curing chamber 71 for subsequent treatment or utilization.

[0068] See Figure 4 , the curing method using the constant temperature and humidity curing device 7 provided by the embodiment of the present application includes the following steps:

[0069] P1. Continuously collect the semi-finished fly ash particles that meet the size requirements and enter the qualified semi-finished product discharge port 61 by using the aggregate cloth component 76. When the semi-finished fly ash particles collected in the aggregate cloth component 76 reach the preset capacity, start the aggregate cloth component 76 to feed the semi-finished fly ash particles into the feeding end of the paving and conveying component 72 according to a certain rule; at the same time, start the paving and conveying component 72, and the paving and conveying component 72 evenly spreads the semi-finished fly ash particles in the curing chamber 71. After the semi-finished fly ash particles are laid, turn off the paving and conveying component 72 and the aggregate cloth component 76.

[0070] P2. Use the temperature and humidity monitoring component 73 to continuously monitor the temperature and humidity in the curing chamber 71, use the temperature regulating component 74 to adjust the temperature in the curing chamber 71 and maintain it at the preset temperature of 60 °C, and use the humidity regulating component 75 to adjust the humidity in the curing chamber 71 and maintain it at the preset humidity of 95% RH; when the temperature and humidity in the curing chamber 71 meet the preset requirements, set the curing time to 3 days and enter the timing stage; when the timing ends, turn off the temperature regulating component 74 and the humidity regulating component 75, and thus complete the curing work of the semi-finished fly ash particles.

[0071] P3. After the temperature in the curing chamber 71 drops to room temperature, start the paving and conveying component 72, and move the cured finished fly ash particles out of the curing chamber 71 through the discharging component 77 for packaging.

[0072] The constant temperature and humidity curing device 7 provided by the embodiments of the present application is used to cure semi-finished fly ash particles under the conditions of constant temperature and humidity, improving the curing quality and efficiency of fly ash particles. This is because such curing conditions can promote the reaction kinetic process within the fly ash particles, effectively avoiding structural looseness or mechanical property defects caused by incomplete reactions. The continuous curing process can also promote the gradient diffusion and orderly dissipation of moisture within the fly ash particles, preventing premature evaporation of free water that has not participated in the reaction, thereby realizing the stable reconstruction of the micro-structure, effectively inhibiting the initiation and propagation of micro-cracks within the material, and promoting the formation of a uniform and dense matrix, thus significantly improving the anti-seepage performance and durability index of the material.

[0073] In some embodiments, referring to Figure 5 , the feeding and conveying assembly 72 includes at least two belt conveyors 721 arranged at intervals from top to bottom. The conveying directions of any two adjacent belt conveyors 721 are opposite. A receiving baffle 722 extending obliquely upward to the outside of the discharge end of the upper-layer belt conveyor 721 is provided at the feeding end of each belt conveyor 721.

[0074] The feeding end of the uppermost belt conveyor 721 forms the feeding end of the entire feeding and conveying assembly 72, and the discharge end of the lowermost belt conveyor 721 forms the discharge end of the entire feeding and conveying assembly 72. By arranging at least two belt conveyors 721 at intervals from top to bottom, the semi-finished fly ash particles can be fed and conveyed between the belt conveyors 721 at different heights, and the feeding amount of the semi-finished fly ash particles in the curing chamber 71 can be increased under the condition of the same feeding thickness. By setting the conveying directions of two adjacent belt conveyors 721 to be opposite, the feeding end of the lower-layer belt conveyor 721 is exactly below the discharge end of the upper-layer belt conveyor 721. Thus, by providing a receiving baffle 722 extending obliquely upward at the feeding end of each belt conveyor 721, and the receiving baffle 722 extends to the outside of the discharge end of the upper-layer belt conveyor 721, the receiving baffle 722 can be used to receive the fly ash particles conveyed by the upper-layer belt conveyor 721 and guide them to the feeding end of the current-layer belt conveyor 721, enabling the semi-finished fly ash particles to smoothly transition from the upper-layer belt conveyor 721 to the lower-layer belt conveyor 721. The receiving baffle 722 can be connected to the frame of the belt conveyor 721 or to the side wall of the curing chamber 71.

[0075] Referring to Figure 5The belt conveyor 721 mainly includes a conveyor belt 7211, a driving roller 7212, a redirecting roller 7213, a roller 7214, a tensioning device, a driving device and a frame. The conveyor belt 7211 can be a belt, a mesh belt or a chain plate belt, which is wound between the driving roller 7212 and the redirecting roller 7213 to form a closed loop for carrying and conveying fly ash particles. The surface of the conveyor belt 7211 is provided with a protruding portion, which is used to prevent the fly ash particles from rolling freely on the conveyor belt 7211. The height and density of the protruding portion can be determined according to calculations. The edge of the conveyor belt 7211 can be adjacent to the side wall of the curing bin 71, and the gap between the two is smaller than the diameter of the fly ash particles, so that the fly ash particles can be prevented from falling from the edge of the conveyor belt 7211. Exemplarily, flanges are provided at both edges of the conveyor belt 7211, and the flanges are used to block the fly ash particles on the conveyor belt 7211, preventing the fly ash particles from falling from the two edges of the conveyor belt 7211, and at the same time increasing the tension strength of the conveyor belt 7211. This structure does not rely on the gap between the edge of the conveyor belt 7211 and the side wall of the curing bin 71, and has a wider range of applications. The driving device is used to drive the active roller 7212 to rotate, and transmit power to the conveyor belt 7211 through the friction between the active roller 7212 and the conveyor belt 7211, so that the conveyor belt 7211 can move continuously to achieve the laying and transportation of fly ash particles. Matching gear teeth can also be provided between the conveyor belt 7211 and the active roller 7212 to avoid slipping between the two and ensure that the linear speeds of the two remain consistent. In order to ensure the consistency of the conveying speed of each layer of belt conveyor 721, all belt conveyors 721 can share a set of driving devices; the driving device includes a reducer and a chain conventional mechanism, and the reducer is connected to the driving roller 7212 of each layer of belt conveyor 721 through a chain transmission mechanism; thus, the reducer can be used to provide power, and the chain conventional mechanism can be used to transmit the power to each driving roller 7212, so as to achieve the synchronous operation of all driving rollers 7212 and ensure the consistency of the conveying speed of each layer of belt conveyor 721. The roller 7214 is used to support the conveyor belt 7211, reduce the sagging of the conveyor belt 7211, and ensure that the conveyor belt 7211 can run smoothly; by arranging multiple rollers 7214 under each conveyor belt 7211, the tension of the conveyor belt 7211 can also be reduced, and the thickness of the conveyor belt 7211 can be reduced. The tensioning device is used to adjust the tension of the conveyor belt 7211 to prevent the conveyor belt 7211 from running off and sagging. The frame is used to install and fix the conveyor belt 7211, the driving roller 7212, the redirecting roller 7213, the idler roller 7214, the tensioning device, the driving device and other components. Each belt conveyor 721 is installed in the curing bin 71 through the frame. To simplify the view, Figure 2 The structures of the tensioning device, the driving device and the frame are not shown.

[0076] In some embodiments, see Figure 5 ,Figure 6 The material laying and conveying assembly 72 further includes a material level detection assembly 723 disposed adjacent to the discharge end of the lowermost belt conveyor 721. Correspondingly, by providing the material level detection assembly 723, it is used to detect whether the fly ash particles are conveyed to the discharge end of the lowermost belt conveyor 721 during material laying, so as to facilitate the operator to timely and accurately close the material laying and conveying assembly 72.

[0077] Among them, the material level detection assembly 723 and the material laying and conveying assembly 72 can be respectively connected to the control system. During operation, when starting the material laying and conveying assembly 72 to lay the semi-finished fly ash particles, if the material level detection assembly 723 detects a material signal, it indicates that the material is conveyed to the discharge end of the lowermost belt conveyor 721. The material level detection assembly 723 transmits the detected material signal to the control system, and the control system controls the material laying and conveying assembly 72 to close. Thus, the laying work of the semi-finished fly ash particles in the curing bin 71 is completed.

[0078] Exemplarily, the material level detection assembly 723 may include a detection frame 7231 and a material level induction probe 7232. The detection frame 7231 can be connected to the side wall of the curing bin 71 or the frame of the belt conveyor 721. The material level induction probe 7232 is disposed above the discharge end of the lowermost belt conveyor 721 and connected to the detection frame 7231. The material level induction probe 7232 can be used to detect whether the material is conveyed to the discharge end of the lowermost belt conveyor 721 during material laying. Among them, the material level induction probe 7232 can be connected to the control system. During the material laying process, when the material level induction probe 7232 detects the material, it transmits the material signal to the control system, and the control system controls the material laying and conveying assembly 72 to close.

[0079] In some embodiments, referring to Figure 5 、 Figure 6 ,the material laying and conveying assembly 72 further includes a material terminal mechanism 724 disposed above the discharge end of the lowermost belt conveyor 721. The material terminal mechanism 724 can open and close the discharge end of the belt conveyor 721. Correspondingly, by providing the material terminal mechanism 724, during material laying, the material terminal mechanism 724 can be used to close the discharge end of the lowermost belt conveyor 721 to block the fly ash particles within the conveyor belt 7211, avoiding the situation that the fly ash particles on the conveyor belt 7211 fall from the discharge end due to the running inertia after the material laying and conveying assembly 72 is closed. After curing is completed, just open the material terminal mechanism 724, and the material laying and conveying assembly 72 can be used to convey the finished fly ash particles away.

[0080] Exemplarily, the material terminal mechanism 724 may include a baffle and a driving member; the driving member may be a linear driving mechanism such as a cylinder or an electric push rod, which is used to drive the baffle to move up and down to open and close the discharge end of the lowermost belt conveyor 721; the driving member may also be a motor, which is used to drive the baffle to flip within a vertical plane to open and close the discharge end of the lowermost belt conveyor 721.

[0081] In some embodiments, referring to Figure 7 , the material collecting and distributing assembly 76 includes a semi-finished product collecting pipe 761, a scraper type discharge machine 762 and a distributing pipe 763. A semi-finished product inlet 711 is provided on the top wall of the curing chamber 71. The upper end of the semi-finished product collecting pipe 761 is communicated with the qualified semi-finished product discharge port 61. The lower end of the semi-finished product collecting pipe 761 is communicated with the semi-finished product inlet 711 through the scraper type discharge machine 762. The semi-finished product inlet 711 is communicated with the feeding end of the paving and conveying assembly 72 through the distributing pipe 763.

[0082] Exemplarily, the semi-finished product collecting pipe 761, the scraper type discharge machine 762, the semi-finished product inlet 711 and the distributing pipe 763 are all connected through a flange bolt structure; a sight glass 764 may also be provided on the semi-finished product collecting pipe 761 so that the operator can observe the quantity of semi-finished fly ash particles collected in the semi-finished product collecting pipe 761. In order to realize the automatic control of the material collecting and distributing assembly 76, a material level detector may also be provided in the semi-finished product collecting pipe 761. The material level detector and the scraper type discharge machine 762 are both connected to the control system. When the semi-finished fly ash particles in the semi-finished product collecting pipe 761 reach a predetermined quantity, the material level detector detects the analog signal of the fly ash particles and transmits the signal to the control system. The control system controls the start of the scraper type discharge machine 762 according to a pre-compiled program to evenly feed the semi-finished fly ash particles in the semi-finished product collecting pipe 761 into the semi-finished product inlet 711. In this way, it can be avoided that the semi-finished fly ash particles on the paving and conveying assembly 72 are intermittent, reducing the efficiency, and at the same time, it can also avoid the idling of the paving and conveying assembly 72 and the scraper type discharge machine 762.

[0083] In some embodiments, referring to Figure 7 , the distributing pipe 763 extends obliquely downward along the conveying direction of the paving and conveying assembly 72. The width of the inner cavity of the distributing pipe 763 gradually increases from top to bottom, and the height of the inner cavity of the distributing pipe 763 gradually decreases from top to bottom. Among them, the width direction of the inner cavity of the distributing pipe 763 is consistent with the width direction of the conveyor belt 7211. Correspondingly, by providing the distributing pipe 763 with an obliquely downward extending and variable diameter structure, the semi-finished fly ash particles rolling from the scraper type discharge machine 762 can be buffered in the distributing pipe 763, slowing down their rolling speed, which is beneficial to the evenness of paving.

[0084] In some embodiments, referring to Figure 8, the discharging assembly 77 includes a finished product collecting hopper 771 and a discharging door 772. A finished product discharging port 712 is provided on the side wall of the curing chamber 71 below the discharging end of the belt conveyor 721 at the lowermost layer. The discharging end of the belt conveyor 721 at the lowermost layer is communicated with the finished product discharging port 712 through the finished product collecting hopper 771. The discharging door 772 is used to open and close the finished product discharging port 712. Exemplarily, the discharging door 772 can be opened and closed by rotation. Correspondingly, after curing is completed, the discharging door 772 is opened, the belt conveyor 721 is started, and the finished fly ash particles are sent into the finished product collecting hopper 771. The finished fly ash particles are then removed from the curing chamber 71 through the finished product discharging port 712 for packaging. Exemplarily, a discharging port guiding slide plate 773 extending obliquely downward is further provided at the lower end of the finished product discharging port 712. The discharging port guiding slide plate 773 is used to guide the finished fly ash particles, facilitating the quick bagging of the finished fly ash particles.

[0085] In some embodiments, refer to Figure 4 , the temperature and humidity monitoring assembly 73 includes a temperature transmitter 731 and a humidity and dryness transmitter 732 provided in the curing chamber 71. Among them, the temperature transmitter 731 is used to collect the temperature data in the curing chamber 71, and the humidity and dryness transmitter 732 is used to collect the humidity data in the curing chamber 71.

[0086] In some embodiments, refer to Figure 9 , the temperature regulating assembly 74 includes a steam heat exchange hot air blower 741. The hot air outlet of the steam heat exchange hot air blower 741 is communicated with the inner cavity of the curing chamber 71 through an air outlet pipe 742. The hot air inlet of the steam heat exchange hot air blower 741 is communicated with the inner cavity of the curing chamber 71 through an air inlet pipe 743. A suction fan 744 is provided on the air inlet pipe 743.

[0087] The steam heat exchange hot air blower 741 is a device that uses steam as a heat source and transfers heat to air through heat exchange. A steam regulating valve 7545 is provided at the steam inlet of the steam heat exchange hot air blower 741, and the steam regulating valve 7545 can be used to adjust the steam flow rate.

[0088] During operation, the suction fan 744 is started. The suction fan 744 extracts the air in the curing chamber 71 and sends it into the steam heat exchange hot air blower 741 through the air inlet pipe 743 to be heated by steam. The heated air is then sent into the curing chamber 71 through the air outlet pipe 742, realizing the circulation of hot air and simultaneously promoting the slow and uniform heating of the interior of the curing chamber 71. During this process, the heating rate in the curing chamber 71 can be adjusted by controlling the rotation speed of the suction fan 744 and the opening degree of the steam regulating valve 7545.

[0089] Exemplarily, the air outlet pipe 742 communicates with the lower part of the inner cavity of the curing chamber 71, and the air inlet pipe 743 communicates with the upper part of the inner cavity of the curing chamber 71. This structure can form a convection in the curing chamber 71, enabling the hot air to be evenly distributed throughout the curing chamber 71, avoiding the formation of a large temperature difference, and reducing the condensation phenomenon.

[0090] In some embodiments, referring to Figure 10 , the humidity adjustment component 75 includes a moisturizing liquid pressure tank 751. The moisturizing liquid pressure tank 751 is communicated with a spray pipe 753 through a delivery pipe 752. A regulating valve 754 is provided on the delivery pipe 752. The spray pipe 753 is arranged in the curing chamber 71 and is provided with a plurality of atomizing nozzles 755 thereon. The humidity adjustment component 75 further includes an exhaust fan 756 arranged in the curing chamber 71.

[0091] The moisturizing liquid pressure tank 751 is a container for storing a moisturizing liquid such as water, and has a certain pressure therein. A moisturizing liquid supply pipe 7511 and an atomizing pressurized air inlet pipe 7512 are provided on the moisturizing liquid pressure tank 751. Valves are provided on both the moisturizing liquid supply pipe 7511 and the atomizing pressurized air inlet pipe 7512. The moisturizing liquid supply pipe 7511 can be used to supplement the moisturizing liquid into the moisturizing liquid pressure tank 751, and the atomizing pressurized air inlet pipe 7512 can be used to convey a gas with a certain pressure into the moisturizing liquid pressure tank 751 to maintain the pressure in the moisturizing liquid pressure tank 751. The bottom of the moisturizing liquid pressure tank 751 is communicated with the spray pipe 753 through the delivery pipe 752. The regulating valve 754 is arranged on the delivery pipe 752 and is used to control the on-off of the delivery pipe 752. A plurality of atomizing nozzles 755 communicating with its inner cavity are arranged along the axial direction of the spray pipe 753. A plurality of exhaust fans 756 can be arranged at the top of the inner cavity of the curing chamber 71, and the exhaust fans 756 can be used to realize the flow and exchange of the gas in the curing chamber 71.

[0092] During operation, only need to open the regulating valve 754, the moisturizing liquid in the moisturizing liquid pressure tank 751 enters the atomizing nozzles 755 successively through the delivery pipe 752 and the spray pipe 753 under the action of pressure. The moisturizing liquid is atomized by the atomizing nozzles 755 and sprayed into the inner cavity of the curing chamber 71. Start the exhaust fan 756 to enable the atomized liquid sprayed out by the atomizing nozzles 755 to quickly fill all parts of the curing chamber 71.

[0093] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. A refuse incineration fly ash granulation system, characterized in that, It includes a raw material preparation device (1), a mixing device (2), a weighing and buffering device (3), and a granulation device (4) which are arranged in sequence from top to bottom and are connected. A spraying device (5) for spraying diluted liquid medicine into the inner cavity is provided on the granulation device (4). The discharge port of the granulation device (4) is connected to the feed port of a screening device (6), and the qualified semi-finished product discharge port (61) of the screening device (6) is connected to a constant temperature and humidity curing device (7).

2. The refuse incineration fly ash granulation system according to claim 1, wherein The raw material preparation device (1) includes a weighing bin (13) arranged above and connected to the mixing device (2) and at least two raw material bins (11) arranged above the weighing bin (13). The bottom of each raw material bin (11) is connected to the top of the weighing bin (13) through a raw material bin screw conveyor (12).

3. The refuse incineration fly ash granulation system according to claim 1, characterized in that, The weighing and buffering device (3) includes a weighing and buffering bin (31) and a buffering bin screw conveyor (32). The top of the weighing and buffering bin (31) is connected to the discharge port of the mixing device (2), and the bottom of the weighing and buffering bin (31) is connected to the feed port of the granulation device (4) through the buffering bin screw conveyor (32).

4. The refuse incineration fly ash granulation system according to claim 1, characterized in that, The screening device (6) is provided with an unqualified semi-finished product discharge port (62), and the unqualified semi-finished product discharge port (62) is connected to the return port of the granulation device (4) through a first elevator (8).

5. The refuse incineration fly ash granulation system according to claim 1, 2, 3 or 4, characterized in that, The constant temperature and humidity curing device (7) includes a curing bin (71), a laying and conveying assembly (72) arranged in the curing bin (71), a temperature and humidity monitoring assembly (73) for detecting the temperature and humidity in the curing bin (71), a temperature regulating assembly (74) for regulating the temperature in the curing bin (71), and a humidity regulating assembly (75) for regulating the humidity in the curing bin (71). A material collecting and distributing assembly (76) for connecting the qualified semi-finished product discharge port (61) and the feed end of the laying and conveying assembly (72) and a discharge assembly (77) connected to the discharge end of the laying and conveying assembly (72) are provided on the curing bin (71).

6. The refuse incineration fly ash granulation system according to claim 5, wherein, The laying and conveying assembly (72) includes at least two belt conveyors (721) arranged at intervals from top to bottom. The conveying directions of any two adjacent belt conveyors (721) are opposite. A receiving baffle (722) extending obliquely upward to the outside of the discharge end of the upper belt conveyor (721) is provided at the feed end of each belt conveyor (721).

7. The refuse incineration fly ash granulation system according to claim 6, wherein The laying and conveying assembly (72) further includes a material level detection assembly (723) arranged adjacent to the discharge end of the lowermost belt conveyor (721).

8. The refuse incineration fly ash granulation system according to claim 6, characterized in that, The laying and conveying assembly (72) further includes a material terminal mechanism (724) arranged above the discharge end of the lowermost belt conveyor (721), and the material terminal mechanism (724) can open and close the discharge end of the belt conveyor (721).

9. The refuse incineration fly ash granulation system according to claim 5, wherein The fabric collecting assembly (76) includes a semi-finished product collecting pipe (761), a scraper type discharging machine (762) and a fabric pipe (763). A semi-finished product feeding port (711) is provided on the top wall of the curing bin (71). The upper end of the semi-finished product collecting pipe (761) is communicated with the qualified semi-finished product discharging port (61). The lower end of the semi-finished product collecting pipe (761) is communicated with the semi-finished product feeding port (711) through the scraper type discharging machine (762). The semi-finished product feeding port (711) is communicated with the feeding end of the paving conveying assembly (72) through the fabric pipe (763).

10. The refuse incineration fly ash granulation system according to claim 9, wherein, The fabric pipe (763) extends obliquely downward along the conveying direction of the paving conveying assembly (72). The width of the inner cavity of the fabric pipe (763) gradually increases from top to bottom, and the height of the inner cavity of the fabric pipe (763) gradually decreases from top to bottom.

Images