Device and method for preparing sintered ceramsite from household garbage incineration fly ash and sludge

Abstract

The invention discloses a device and a method for preparing sintered ceramsite from household garbage incineration fly ash and sludge. The device comprises a fly ash cleaning mechanism, a moisture regulation and control mechanism, a mixed rolling mechanism, a granulation mechanism and a tunnel kiln, the fly ash cleaning mechanism comprises a cleaning mechanism outer shell, and a fly ash cleaning inner shell is rotationally connected into the cleaning mechanism outer shell. The moisture regulation and control mechanism comprises a regulation and control mechanism shell, a moisture evaporation roller is rotationally connected in the regulation and control mechanism shell, the mixed rolling mechanism comprises a mixed rolling shell, and a fly ash mud cake rolling roller, a sludge rolling roller and a mixed rolling roller are rotationally connected in the mixed rolling shell; the granulation mechanism comprises a granulation mechanism shell, and a granulation rolling roller is rotationally connected into the granulation mechanism shell; the household garbage incineration fly ash and sludge are made of muddy materials in the whole process, dust pollution is almost avoided, the fly ash and the sludge do not need to be dried, residual water in the fly ash and the sludge is washed with water, and additional water adding is not needed.

Description

Technical Field

[0001] The present invention relates to the technical field of waste resource utilization, and in particular to a device and method for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste. Background Art

[0002] The production of domestic waste and sewage sludge is enormous. Using ceramsite produced from these waste as a building material is an effective means of decontaminating and reusing resources, reducing the potential environmental hazards of fly ash and sewage sludge. Hazardous substances such as heavy metals and dioxins in fly ash, as well as organic matter and pathogens in sewage sludge, are effectively treated and solidified through a high-temperature sintering process, reducing the migration and spread of pollutants, the extraction of natural raw materials, and dependence on natural resources. The production of ceramsite typically consumes large amounts of resources such as clay. Replacing some natural raw materials with waste contributes to the sustainable use of resources.

[0003] However, the typical production method involves adding dried household waste and sludge to auxiliary materials, adding water to granulate, and then sintering to form ceramsite. This method generates a large amount of dust during the production process, which is harmful to human health and environmental safety. Furthermore, the drying process of the sludge and fly ash consumes a lot of energy, and the granulation process consumes a large amount of water resources. Summary of the Invention

[0004] The object of the present invention is to provide a device and method for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste, which can not only save energy but also make the quality of the sintered ceramsite products more stable.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for preparing sintered ceramsite from fly ash from domestic waste incineration and sludge, comprising a fly ash cleaning mechanism for cleaning the fly ash from domestic waste incineration, a moisture control mechanism for heating and evaporating the cleaned fly ash from domestic waste incineration, a mixing and rolling mechanism for rolling the heated and evaporated fly ash from domestic waste incineration and sludge, a granulating mechanism for granulating the rolled mixture of the fly ash from domestic waste incineration and sludge, and a tunnel kiln for sintering the granulated mixture;

[0007] The fly ash cleaning mechanism includes a cleaning mechanism outer shell, a fly ash cleaning inner shell is coaxially and rotatably connected to the cleaning mechanism outer shell, a plurality of small holes communicating with each other are provided on the side wall of the fly ash cleaning inner shell, a discharge bottom cover matching hole communicating with each other is provided at the bottom of the cleaning mechanism outer shell, and a discharge bottom cover is connected to the discharge bottom cover matching hole;

[0008] A fly ash delivery pipe and a cleaning water delivery pipe are fixed on the top of the cleaning mechanism shell;

[0009] The moisture control mechanism includes a control mechanism housing, a moisture evaporation drum is rotatably connected to the control mechanism housing, a raw material input housing is fixed on the upper side of the moisture evaporation drum in the control mechanism housing, and a raw material stripping scraper is fixed on the lower side of the moisture evaporation drum in the control mechanism housing;

[0010] A raw material collection box with an upward opening is provided at the bottom of the inner bottom of the regulating mechanism shell;

[0011] A plurality of balanced heat conducting plates are fixed on the inner wall of the water evaporation drum, and a steam heat exchanger is fixed on each balanced heat conducting plate;

[0012] The mixed rolling mechanism comprises a mixed rolling shell, in which two symmetrically arranged fly ash mud cake rolling rollers, two symmetrically arranged sludge rolling rollers and two symmetrically arranged mixed rolling rollers are rotatably connected;

[0013] A rolling material conveyor is provided at the bottom of the mixed rolling shell;

[0014] The granulation mechanism includes a granulation mechanism shell, in which two symmetrically arranged granulation rolling rollers are rotatably connected, and the side walls of the granulation rolling rollers are provided with a plurality of granulation mold fixing holes communicating with each other, and the granulation mold fixing holes are fixed with granulation molds;

[0015] A granulation raw material conveyor is fixed above the granulation rolling drum in the granulation mechanism shell, and a particle raw material conveyor is fixed below the granulation rolling drum in the granulation mechanism shell.

[0016] Preferably, a bottom cover deflection connecting plate is fixed on the discharge bottom cover, and the bottom cover deflection connecting plate is connected to the outer wall of the cleaning mechanism housing through a first fixed hinge, and a deflection drive telescopic rod is hinged between the other end of the bottom cover deflection connecting plate and the outer wall of the cleaning mechanism housing;

[0017] The discharge bottom cover is located on one side inside the outer shell of the cleaning mechanism and is rotatably connected to the sealing disk at the bottom of the inner shell;

[0018] A bottom cover sealing matching ring is fixed in the matching hole of the discharge bottom cover, and the discharge bottom cover and the bottom cover sealing matching ring are sealingly sleeved.

[0019] Note: Under normal cleaning working conditions, the discharge bottom cover is sealed in the discharge bottom cover matching hole, and the sealing plate at the bottom of the inner shell is sealed in the lower end of the fly ash cleaning inner shell;

[0020] After the dehydration of the domestic waste incineration fly ash is completed, the deflection-driven telescopic rod drives the discharge bottom cover to detach from the discharge bottom cover matching hole. At this time, the discharge bottom cover matching hole is in an open state, which facilitates the dehydrated domestic waste incineration fly ash to be discharged from the lower end of the fly ash cleaning inner shell and discharged through the discharge bottom cover matching hole.

[0021] Preferably, a rotating matching ring is coaxially fixed in the cleaning mechanism housing, and a rotating support ring is fixed on the outer side wall of the fly ash cleaning inner shell, and the rotating support ring is rotatably sleeved with the rotating matching ring;

[0022] A rotating drive accommodating shell is fixed on the outer wall of the cleaning mechanism shell, the rotating drive accommodating shell is connected to the interior of the cleaning mechanism shell, a dehydration drive motor is fixed in the rotating drive accommodating shell, a driving pulley is fixed on the output shaft of the dehydration drive motor, a driven pulley is fixed on the outer surface of the fly ash cleaning inner shell, and a dehydration drive belt is connected between the driving pulley and the driven pulley.

[0023] Description: The active pulley on the output shaft of the dehydration drive motor drives the driven pulley to rotate together with the fly ash cleaning inner shell through the dehydration drive belt. Under the centrifugal action, the moisture in the fly ash from the domestic waste incineration is discharged through the small holes on the side wall of the fly ash cleaning inner shell, thereby realizing the dehydration treatment of the fly ash from the domestic waste incineration.

[0024] Preferably, a cleaning and stirring mechanism is provided on the top of the cleaning mechanism shell, the cleaning and stirring mechanism comprises a cleaning and stirring shaft rotatably connected to the top of the cleaning mechanism shell and vertically extending to the inside of the fly ash cleaning inner shell, and a plurality of cleaning and stirring short rods are fixed on the cleaning and stirring shaft;

[0025] A stirring drive accommodating shell is fixed on the top of the cleaning mechanism shell, the upper end of the cleaning stirring shaft extends into the stirring drive accommodating shell, and a stirring drive motor for driving the cleaning stirring shaft to rotate is fixed in the stirring drive accommodating shell.

[0026] Description: The cleaning stirring shaft is driven by a stirring drive motor to rotate, and the cleaning stirring shaft drives multiple cleaning stirring short rods to rotate together with it, stirring and cleaning the mixture of domestic waste incineration fly ash and water in the fly ash cleaning inner shell.

[0027] Preferably, a fly ash suppression mechanism is provided at the top of the cleaning mechanism housing, the fly ash suppression mechanism comprises a fly ash suppression support ring fixed at the top of the cleaning mechanism housing, and a plurality of fly ash suppression nozzles are fixed on the inner side surface of the fly ash suppression support ring;

[0028] Description: The delivery pump delivers water to each fly ash suppression nozzle through a pipeline. Each fly ash suppression nozzle sprays water in the form of water mist, forming a water mist isolation wall on the top of the fly ash cleaning inner shell to suppress the fly ash from floating around.

[0029] Preferably, an evaporative waste gas discharge mechanism is provided in the outer shell of the control mechanism, and the evaporative waste gas discharge mechanism includes an evaporative waste gas collection shell fixed inside the outer shell of the control mechanism and located on one side of the water evaporation roller. The evaporative waste gas collection shell has a plurality of waste gas collection holes communicating with the inside and outside on the side close to the water evaporation roller. An exhaust gas conveying shell is fixed on the top of the outer shell of the control mechanism, and the exhaust gas conveying shell is connected to the evaporative waste gas collection shell through an exhaust gas conveying connecting pipe.

[0030] Description: Use the vacuum pump to evacuate the interior of the exhaust gas conveying shell. Under the action of negative pressure, the exhaust gas generated by the heating and evaporation of the fly ash mud cake enters the interior of the evaporation exhaust gas gathering shell through the exhaust gas gathering through hole. The exhaust gas then enters the interior of the exhaust gas conveying shell through the exhaust gas conveying connecting pipe, and is finally discharged under the conveying action of the vacuum pump.

[0031] Preferably, an auxiliary evaporation mechanism is provided in the outer shell of the control mechanism, and the auxiliary evaporation mechanism includes a plurality of auxiliary evaporation containing shells fixed inside the outer shell of the control mechanism and located on one side of the water evaporation roller. Each auxiliary evaporation containing shell has a plurality of lens fixing holes communicating with the inside and outside on the side close to the water evaporation roller, and an evaporation focusing lens is fixed in the lens fixing hole. A plurality of heat radiation lamps are fixed inside each auxiliary evaporation containing shell.

[0032] Description: The auxiliary evaporation mechanism is used to assist in heating and evaporating the fly ash cake coated on the surface of the water evaporation drum. The light and heat energy generated by each thermal radiation lamp is focused on the fly ash cake through the evaporation focusing lens to assist in heating and evaporating the fly ash cake.

[0033] Preferably, the regulating mechanism housing is located on the other side of the water evaporation drum and is rotatably connected to a cleaning shaft, which is provided with a cleaning brush. The bottom of the regulating mechanism housing is located directly below the cleaning shaft and is provided with a residue collection box with an upward opening.

[0034] Description: When the outer surface of the water evaporation drum passes through the cleaning shaft, the motor drives the cleaning shaft to rotate, and the fly ash mud cake remaining on the surface of the water evaporation drum is cleaned and peeled off by the cleaning brush. The residue dropped by cleaning will fall into the residue collection box below and be collected, so as to clean the surface of the water evaporation drum and facilitate the application of new fly ash mud cake on the surface of the water evaporation drum for heating and evaporation.

[0035] Preferably, an auxiliary stripping mechanism is provided on each side of the granulation mechanism housing, which is located away from each other of the two granulation rolling rollers. The auxiliary stripping mechanism includes a high-pressure air pipe, and multiple stripping ventilation pipes are fixed on the side of the high-pressure air pipe. One end of the stripping ventilation pipe is connected to the high-pressure air pipe, and the stripping ventilation pipe has a pneumatic control valve, and the other end of the stripping ventilation pipe is fixed with a pneumatic nozzle.

[0036] Description: The auxiliary stripping mechanism is used to assist in stripping the mixed mud particles in the granulation mold. When the granulation mold containing the mixed mud particles passes the pneumatic nozzle, the pneumatic control valve is controlled to open, so that a high-speed airflow is ejected from the pneumatic nozzle. Under the impact of the high-speed airflow, the mixed mud particles are separated from the granulation mold.

[0037] The present invention also provides a method for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste. The method is based on the above-mentioned device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste, and comprises the following steps:

[0038] S1. Fly ash cleaning:

[0039] The fly ash from the incineration of domestic waste is transported to the fly ash transport pipe by a conveyor. The fly ash from the incineration of domestic waste falls into the fly ash cleaning inner shell through the fly ash transport pipe. Clean water is transported to the cleaning water pipe by a conveying pump. The clean water falls into the fly ash cleaning inner shell through the cleaning water pipe and mixes with the fly ash from the incineration of domestic waste;

[0040] Stirring and cleaning the mixture of domestic waste incineration fly ash and water in the fly ash cleaning inner shell;

[0041] After the domestic waste incineration fly ash is cleaned, the cleaning wastewater is discharged;

[0042] Then, the fly ash from the domestic waste incineration that has been cleaned in the fly ash cleaning inner shell is dehydrated. By rotating the fly ash cleaning inner shell, the water in the fly ash from the domestic waste incineration is discharged through the small holes on the side wall of the fly ash cleaning inner shell under the centrifugal effect;

[0043] Open the discharge bottom cover to allow the dehydrated domestic waste incineration fly ash to be discharged from the matching hole of the discharge bottom cover.

[0044] The cleaned and dehydrated domestic waste incineration fly ash forms fly ash cake;

[0045] S2. Moisture control of fly ash cake:

[0046] The fly ash cake is fed into the raw material input shell by a delivery pump, and the servo motor drives the moisture evaporation drum to rotate counterclockwise. When the moisture evaporation drum passes through the raw material input shell, the fly ash cake inside the raw material input shell is evenly spread on the surface of the moisture evaporation drum;

[0047] High-temperature steam is introduced into each steam heat exchanger, and the heat dissipation end of the steam heat exchanger transfers heat to the water evaporation drum through the balanced heat conduction plate, heating and evaporating the fly ash cake smeared on the surface of the water evaporation drum to adjust the water content of the fly ash cake, thereby obtaining a heated and evaporated fly ash cake;

[0048] Calculate the required moisture content of the fly ash cake based on the moisture content of the incoming sludge raw materials, so that the moisture content of the fly ash cake after heating and evaporation is controlled at 10-50%;

[0049] When the fly ash cake after heating and evaporation passes through the raw material stripping scraper, the fly ash cake after heating and evaporation coated on the surface of the water evaporation drum is stripped by the raw material stripping scraper, and the stripped fly ash cake after heating and evaporation falls into the raw material collection box below for collection;

[0050] S3. Rolling the fly ash cake and sludge:

[0051] The fly ash cake rolling roller is driven by a servo motor to rotate, and the fly ash cake after heating and evaporation is rolled into a fly ash sheet with a thickness of d1 by the fly ash cake rolling roller. The sludge rolling roller is driven by a servo motor to rotate, and the sludge is rolled into a sludge sheet with a thickness of d2 by the sludge rolling roller.

[0052] The fly ash sludge sheet and the sewage sludge sheet are combined at the mixing rolling roller, which is driven by a servo motor to rotate. The fly ash sludge sheet and the sewage sludge sheet are rolled into a mixed mud sheet with a thickness of d3 by the mixing rolling roller;

[0053] Among them, d1 is 1 to 5 cm, d2 is 1 to 5 cm, and d3 is 1 to 5 cm;

[0054] The moisture content of the mixed mud flakes is controlled at 20-60%;

[0055] S4, continue mixed rolling:

[0056] The mixed mud flakes are divided into two equal parts and rolled by a fly ash mud cake rolling roller and a sludge rolling roller respectively, and then combined and rolled by a mixing rolling roller. "Step S4" is repeated 5 to 10 times until the fly ash mud flakes and the sludge flakes in the mixed mud flakes are evenly mixed together;

[0057] S5. Granulate the mixed mud flakes:

[0058] The mixed mud flakes are conveyed to the upper side of the granulation rolling drum by the granulation raw material conveyor. The granulation rolling drum is driven by a servo motor, and the conveying direction of the side where the two granulation rolling drums are close to each other is downward. During the continuous rotation of the granulation rolling drums, the mixed mud flakes are drawn into the granulation die between the granulation rolling drums. The mixed mud flakes are squeezed into regular shapes in the granulation die to form mixed mud particles.

[0059] The mixed mud particles separated from the granulation die fall onto the granule raw material conveyor, which transports the mixed mud particles out;

[0060] S6. Sintering the mixed mud particles:

[0061] The mixed mud particles are transported to a tunnel kiln for heating and sintering at a sintering temperature of 1050-1250°C and a sintering time of 40-90 minutes, ultimately forming a sintered ceramsite product.

[0062] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0063] 1. In the entire manufacturing process of the present invention, fly ash and sludge from domestic waste incineration are made of muddy materials, which almost eliminates dust pollution. The fly ash and sludge do not need to be dried, saving energy. The water contained in the fly ash and sludge is used for washing, eliminating the need for additional water and saving water resources.

[0064] 2. The fly ash cleaning mechanism of the present invention can clean and dehydrate fly ash from domestic waste incineration. The fly ash suppression mechanism can effectively prevent fly ash from scattering. The cleaned and dehydrated fly ash from domestic waste incineration forms a fly ash cake, which is convenient for subsequent processing.

[0065] 3. The moisture control mechanism of the present invention can better regulate the moisture in the fly ash mud cake, avoiding excessively high moisture content of the fly ash mud cake, which increases energy consumption during the firing process, and may cause quality problems such as cracking and deformation of the ceramsite during the firing process, thereby ensuring better quality of the final product;

[0066] 4. The present invention utilizes a mixing and rolling mechanism to mix and roll the fly ash cake and the sludge multiple times, so that the fly ash cake and the sludge are evenly mixed to form a mixed raw material, which is convenient for subsequent granulation and ensures the consistency of the final ceramsite composition;

[0067] 5. The granulation mechanism of the present invention can prepare the mixed raw material formed by fly ash cake and sludge into mixed mud particles of uniform size, so as to ensure the uniformity of the sintering degree of the mixed mud particles during the sintering process;

[0068] 6. The granulation mechanism of the present invention heats the granulation mold by using an electromagnetic heating induction coil, so that a layer of water vapor is formed between the mixed mud particles and the inner wall of the granulation mold, which is conducive to demoulding the mixed mud particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic diagram of the overall layout of the present invention;

[0070] Figure 2 It is a structural schematic diagram of the fly ash cleaning mechanism of the present invention;

[0071] Figure 3 It is a structural schematic diagram of the moisture control mechanism of the present invention;

[0072] Figure 4 This is a schematic structural diagram of the raw material input shell of the present invention;

[0073] Figure 5 It is a structural schematic diagram of the auxiliary evaporation mechanism of the present invention;

[0074] Figure 6 It is a structural schematic diagram of the hybrid rolling mechanism of the present invention;

[0075] Figure 7 It is a structural schematic diagram of the rolling material guide plate of the present invention;

[0076] Figure 8 It is a structural schematic diagram of the granulation mechanism of the present invention;

[0077] Figure 9It is a structural schematic diagram of the auxiliary peeling mechanism of the present invention.

[0078] In the figure, 10-fly ash cleaning mechanism, 101-cleaning wastewater discharge pipe, 102-wastewater discharge control valve, 11-cleaning mechanism housing, 111-discharge bottom cover matching hole, 112-discharge bottom cover, 113-bottom cover deflection connecting plate, 114-first fixed hinge, 115-deflection drive telescopic rod, 116-second fixed hinge, 117-third fixed hinge, 118-inner shell bottom sealing disk, 119-bottom cover sealing matching ring, 12-fly ash cleaning inner shell, 121-rotation matching ring, 1211-radial fixed rod, 122-rotation support ring, 131-fly ash conveying pipe, 132-cleaning water pipe, 141-rotation Drive housing, 142-dehydration drive motor, 143-driving pulley, 144-driven pulley, 145-dehydration drive belt, 15-cleaning and stirring mechanism, 151-cleaning and stirring shaft, 152-cleaning and stirring short rod, 153-stirring drive housing, 154-stirring drive motor, 16-fly ash suppression mechanism, 161-fly ash suppression support ring, 162-fly ash suppression nozzle, 20-moisture control mechanism, 21-control mechanism shell, 211-raw material collection box, 212-residue collection box, 22-water evaporation roller, 221-balanced heat conduction plate, 222-steam heat exchanger, 23-raw material input shell, 230-raw material Material output trough, 231-raw material input pipe, 24-raw material stripping scraper, 25-evaporation exhaust gas discharge mechanism, 251-evaporation exhaust gas convergence shell, 252-exhaust gas collection through hole, 253-exhaust gas conveying shell, 254-exhaust gas conveying connecting pipe, 26-auxiliary evaporation mechanism, 261-auxiliary evaporation containing shell, 262-evaporation focusing lens, 263-thermal radiation lamp, 271-cleaning shaft, 272-cleaning brush, 30-mixed rolling mechanism, 31-mixed rolling shell, 311-fly ash rolling input port, 312-sludge rolling input port, 313-mixed rolling conveying outlet, 32-fly ash mud cake rolling roller, 33-sludge rolling Roller, 34-mixed rolling roller, 35-rolled material conveyor, 361-mixed rolling conveyor track, 362-mixed rolling conveyor slider, 37-rolled material guide plate, 371-guide shaft fixing groove, 372-rolled material guide roller, 40-granulation mechanism, 41-granulation mechanism shell, 42-granulation rolling drum, 421-granulation mold fixing hole, 422-electromagnetic heating induction coil, 420-granulation mold, 43-granulation raw material conveyor, 44-granular raw material conveyor, 45-auxiliary stripping mechanism, 451-high-pressure air transmission pipe, 452-stripping vent pipe, 453-pneumatic control valve, 454-pneumatic nozzle. DETAILED DESCRIPTION

[0079] The following combination Figures 1-9The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of the respective main views or structural schematics themselves;

[0080] The sludge mentioned below is the sludge generated during the sewage purification process.

[0081] Example 1: A device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste, such as Figure 1 As shown, it includes a fly ash cleaning mechanism 10 for cleaning fly ash from domestic waste incineration, a moisture control mechanism 20 for heating and evaporating the cleaned fly ash from domestic waste incineration, a mixing and rolling mechanism 30 for rolling the heated and evaporated fly ash from domestic waste incineration and sludge, a granulating mechanism 40 for granulating the rolled mixture of fly ash from domestic waste incineration and sludge, and a tunnel kiln 50 for sintering the granulated mixture;

[0082] like Figure 2 As shown, the fly ash cleaning mechanism 10 includes a cleaning mechanism housing 11, which is a vertically placed cylindrical shell. A fly ash cleaning inner shell 12 is coaxially and rotatably connected to the cleaning mechanism housing 11. The side wall of the fly ash cleaning inner shell 12 has a plurality of small holes communicating with the inside and outside. The fly ash cleaning inner shell 12 is a vertically through cylindrical shell. The bottom of the cleaning mechanism housing 11 has a discharge bottom cover matching hole 111 communicating with the inside and outside. The discharge bottom cover matching hole 111 is connected to the discharge bottom cover 112.

[0083] A fly ash delivery pipe 131 and a cleaning water delivery pipe 132 are fixed to the top of the cleaning mechanism housing 11;

[0084] A cleaning wastewater discharge pipe 101 is fixed to the outside of the cleaning mechanism housing 11 near the bottom thereof and is connected to the inside thereof. The cleaning wastewater discharge pipe 101 is provided with a wastewater discharge control valve 102.

[0085] A bottom cover deflection connecting plate 113 is fixed to the discharge bottom cover 112. The bottom cover deflection connecting plate 113 is connected to the outer wall of the cleaning mechanism housing 11 through a first fixed hinge 114. A deflection drive telescopic rod 115 is hinged between the other end of the bottom cover deflection connecting plate 113 and the outer wall of the cleaning mechanism housing 11. The deflection drive telescopic rod 115 is an electrically controlled telescopic rod. The outer rod end of the deflection drive telescopic rod 115 is connected to the outer wall of the cleaning mechanism housing 11 through a second fixed hinge 116. The inner rod end of the deflection drive telescopic rod 115 is connected to the bottom cover deflection connecting plate 113 through a third fixed hinge 117.

[0086] The discharge bottom cover 112 is located inside the cleaning mechanism housing 11 and is rotatably connected to a sealing disk 118 at the bottom of the inner housing.

[0087] A bottom cover sealing matching ring 119 is fixed in the matching hole 111 of the discharge bottom cover, and the discharge bottom cover 112 is sealingly sleeved with the bottom cover sealing matching ring 119 .

[0088] A rotating mating ring 121 is coaxially fixed inside the cleaning mechanism housing 11. The rotating mating ring 121 is fixedly connected to the inner wall of the cleaning mechanism housing 11 through multiple radial fixing rods 1211. A rotating support ring 122 is fixed to the outer wall of the fly ash cleaning inner shell 12. The rotating support ring 122 is rotatably sleeved with the rotating mating ring 121.

[0089] A rotating drive accommodating shell 141 is fixed on the outer wall of the cleaning mechanism shell 11, and the rotating drive accommodating shell 141 is communicated with the interior of the cleaning mechanism shell 11. A dehydration drive motor 142 is fixed in the rotating drive accommodating shell 141, and a driving pulley 143 is fixed on the output shaft of the dehydration drive motor 142. A driven pulley 144 is fixed on the outer surface of the fly ash cleaning inner shell 12, and a dehydration drive belt 145 is connected between the driving pulley 143 and the driven pulley 144.

[0090] like Figure 2 As shown, a cleaning and stirring mechanism 15 is provided on the top of the cleaning mechanism housing 11. The cleaning and stirring mechanism 15 includes a cleaning and stirring shaft 151 which is rotatably connected to the top of the cleaning mechanism housing 11 and vertically extends to the inside of the fly ash cleaning inner shell 12. A plurality of cleaning and stirring short rods 152 are fixed on the cleaning and stirring shaft 151.

[0091] A stirring drive housing 153 is fixed to the top of the cleaning mechanism housing 11 , and the upper end of the cleaning stirring shaft 151 extends into the stirring drive housing 153 . A stirring drive motor 154 is fixed in the stirring drive housing 153 for driving the cleaning stirring shaft 151 to rotate.

[0092] like Figure 3 As shown, the moisture control mechanism 20 includes a control mechanism housing 21, a moisture evaporation drum 22 is rotatably connected to the control mechanism housing 21, a raw material input housing 23 is fixed on the upper side of the moisture evaporation drum 22 in the control mechanism housing 21, and a raw material stripping scraper 24 is fixed on the lower side of the moisture evaporation drum 22 in the control mechanism housing 21;

[0093] like Figure 4 As shown, the raw material input shell 23 is opened downward and extends in a direction parallel to the axis of the water evaporation drum 22. The raw material input shell 23 has a raw material output slot 230 at the bottom left side.

[0094] A plurality of raw material input pipes 231 connected to the interior of the raw material input shell 23 are fixed on the top of the raw material input shell 23;

[0095] The fly ash cake or sludge is transported to each raw material input pipe 231 by a delivery pump and collected in the raw material input shell 23 . As the water evaporation drum 22 rotates, the fly ash cake or sludge will be smeared on the outer surface of the water evaporation drum 22 .

[0096] A raw material collection box 211 with an upward opening is provided at the bottom of the regulating mechanism housing 21;

[0097] A plurality of balanced heat conducting plates 221 are fixed on the inner side wall of the water evaporation drum 22, and a steam heat exchanger 222 is fixed on each balanced heat conducting plate 221;

[0098] The heat dissipation end of the steam heat exchanger 222 is fixed closely to the balanced heat conducting plate 221;

[0099] like Figure 3 As shown, an evaporative exhaust gas discharge mechanism 25 is provided in the control mechanism housing 21. The evaporative exhaust gas discharge mechanism 25 includes an evaporative exhaust gas collection shell 251 fixed inside the control mechanism housing 21 and located on one side of the water evaporation drum 22. The evaporative exhaust gas collection shell 251 has a plurality of exhaust gas collection through holes 252 communicating with the inside and outside on a side close to the water evaporation drum 22. An exhaust gas conveying shell 253 is fixed on the top of the control mechanism housing 21. The exhaust gas conveying shell 253 is connected to the evaporative exhaust gas collection shell 251 through an exhaust gas conveying connecting pipe 254.

[0100] The exhaust gas conveying shell 253 is evacuated by an exhaust fan. Under the action of negative pressure, the evaporated exhaust gas enters the evaporated exhaust gas gathering shell 251 through the exhaust gas gathering hole 252, and then enters the exhaust gas conveying shell 253 through the exhaust gas conveying connecting pipe 254.

[0101] like Figure 6 As shown, the mixing rolling mechanism 30 includes a mixing rolling shell 31, in which two symmetrically arranged fly ash cake rolling rollers 32, two symmetrically arranged sludge rolling rollers 33 and two symmetrically arranged mixing rolling rollers 34 are rotatably connected;

[0102] The fly ash cake rolling roller 32 and the sludge rolling roller 33 are arranged in parallel above the mixing rolling roller 34;

[0103] The top of the mixed rolling shell 31 has a vertically penetrating fly ash rolling input port 311 and a sludge rolling input port 312. The fly ash rolling input port 311 is located above the fly ash mud cake rolling roller 32, and the sludge rolling input port 312 is located above the sludge rolling roller 33.

[0104] A rolling material conveyor 35 is provided at the bottom of the hybrid rolling shell 31, and the rolling material conveyor 35 is a belt conveyor;

[0105] like Figure 7As shown, a rolling material guide plate 37 is fixed in the mixed rolling shell 31 below the fly ash cake rolling roller 32 and below the sludge rolling roller 33. The rolling material guide plate 37 has a plurality of guide shaft fixing grooves 371, and the guide shaft fixing grooves 371 are rotatably connected to the rolling material guide rollers 372.

[0106] The upper ends of the two rolling material guide plates 37 are respectively arranged below the fly ash cake rolling roller 32 and the sludge rolling roller 33, and the lower ends of the two rolling material guide plates 37 are arranged above the mixing rolling roller 34;

[0107] like Figure 8 As shown, the granulation mechanism 40 includes a granulation mechanism housing 41, and two symmetrically arranged granulation rolling rollers 42 are rotatably connected in the granulation mechanism housing 41. Figure 9 As shown, the side wall of the granulation rolling drum 42 is provided with a plurality of granulation mold fixing holes 421 communicating with each other inside and outside, and a granulation mold 420 is fixed in the granulation mold fixing hole 421;

[0108] The granulation mold 420 is a hemispherical shell structure, and its opening faces the outside of the granulation mechanism housing 41;

[0109] An electromagnetic heating induction coil 422 is fixed on one side of the granulation mold 420 inside the granulation mechanism housing 41;

[0110] A granulation raw material conveyor 43 is fixed above the granulation rolling drum 42 in the granulation mechanism housing 41. The granulation raw material conveyor 43 is a belt conveyor. A granulation raw material conveyor 44 is fixed below the granulation rolling drum 42 in the granulation mechanism housing 41. The granulation raw material conveyor 44 is a belt conveyor.

[0111] Example 2: Based on Example 1, Figure 2 As shown, a fly ash suppression mechanism 16 is provided on the top of the cleaning mechanism housing 11. The fly ash suppression mechanism 16 includes a fly ash suppression support ring 161 fixed to the top of the cleaning mechanism housing 11. A plurality of fly ash suppression nozzles 162 are fixed on the inner side surface of the fly ash suppression support ring 161.

[0112] Water is delivered to each fly ash suppression nozzle 162 through a pipeline by a delivery pump. Each fly ash suppression nozzle 162 sprays water in the form of water mist, forming a water mist isolation wall on the top of the fly ash cleaning inner shell 12 to suppress the fly ash from floating around.

[0113] Example 3: Based on Example 2, Figure 3 As shown, an auxiliary evaporation mechanism 26 is provided in the regulating mechanism housing 21. Figure 5As shown, the auxiliary evaporation mechanism 26 includes a plurality of auxiliary evaporation containing shells 261 fixed inside the regulating mechanism housing 21 and located on one side of the water evaporation roller 22. The auxiliary evaporation containing shells 261 are extended and arranged in a direction parallel to the axis of the water evaporation roller 22. Each auxiliary evaporation containing shell 261 has a plurality of lens fixing holes 2611 communicating with the inside and outside on the side close to the water evaporation roller 22. An evaporation focusing lens 262 is fixed in the lens fixing hole 2611. The evaporation focusing lens 262 is a Fresnel lens. A plurality of heat radiation lamps 263 are fixed inside each auxiliary evaporation containing shell 261.

[0114] Example 4: Based on Example 3, Figure 3 As shown, the regulating mechanism housing 21 is located on the other side of the water evaporation roller 22 and is rotatably connected to a cleaning shaft 271 , on which a cleaning brush 272 is provided. A residue collection box 212 with an upward opening is provided at the bottom of the regulating mechanism housing 21 directly below the cleaning shaft 271 .

[0115] Example 5: Based on Example 4, Figure 6 As shown, a plurality of parallel mixed rolling conveying rails 361 are fixed to the bottom of the mixed rolling housing 31, and a mixed rolling conveying slider 362 is slidably connected to the mixed rolling conveying rail 361. The base of the rolled material conveyor 35 is fixed on the top of the plurality of mixed rolling conveying sliders 362.

[0116] The hybrid rolling conveying slider 362 is driven by a servo motor to move along the hybrid rolling conveying track 361;

[0117] The side surface of the mixing rolling shell 31 is provided with a mixing rolling delivery outlet 313 communicating with the inside and outside.

[0118] Example 6: Based on Example 5, Figure 8 As shown, an auxiliary stripping mechanism 45 is provided on each side of the granulation mechanism housing 41, which is located away from each other between the two granulation rolling rollers 42. Figure 9 As shown, the auxiliary stripping mechanism 45 includes a high-pressure air pipe 451, which extends and is arranged in a direction parallel to the axis of the granulation rolling drum 42. A plurality of stripping vent pipes 452 are fixed to the side of the high-pressure air pipe 451. One end of the stripping vent pipe 452 is connected to the high-pressure air pipe 451, and a pneumatic control valve 453 is provided on the stripping vent pipe 452. A pneumatic nozzle 454 is fixed to the other end of the stripping vent pipe 452.

[0119] It should be noted that the above-mentioned wastewater discharge control valve 102, the first fixed hinge 114, the deflection drive telescopic rod 115, the second fixed hinge 116, the third fixed hinge 117, the dehydration drive motor 142, the driving pulley 143, the driven pulley 144, the dehydration drive belt 145, the stirring drive motor 154, the steam heat exchanger 222, the rolling material conveyor 35, the granulation raw material conveyor 43, the particle raw material conveyor 44, the fly ash suppression nozzle 162, the evaporation focusing lens 262, the thermal radiation lamp 263, the pneumatic control valve 453, and the pneumatic nozzle 454 are all existing technologies, and those skilled in the art can choose to use them at their own discretion, and no special limitation is made here.

[0120] Example 7: This example describes a method for preparing sintered ceramsite from fly ash from incineration of domestic waste and sludge. The method is based on the apparatus for preparing sintered ceramsite from fly ash from incineration of domestic waste and sludge in Example 1, and includes the following steps:

[0121] S1. Fly ash cleaning:

[0122] A conveyor is used to convey the fly ash from the incineration of domestic waste to the fly ash conveying pipe 131. The fly ash from the incineration of domestic waste falls into the fly ash cleaning inner shell 12 through the fly ash conveying pipe 131. A conveying pump is used to convey clean water to the cleaning water conveying pipe 132. The clean water falls into the fly ash cleaning inner shell 12 through the cleaning water conveying pipe 132 and mixes with the fly ash from the incineration of domestic waste.

[0123] The cleaning stirring shaft 151 is driven to rotate by the stirring drive motor 154, and the cleaning stirring shaft 151 drives the multiple cleaning stirring short rods 152 to rotate together with it, stirring and cleaning the mixture of domestic waste incineration fly ash and water in the fly ash cleaning inner shell 12;

[0124] After the domestic waste incineration fly ash is cleaned, the wastewater discharge control valve 102 is opened, and the cleaning wastewater is discharged through the cleaning wastewater discharge pipe 101;

[0125] The cleaned domestic waste incineration fly ash in the fly ash cleaning inner shell 12 is then dehydrated. The driving pulley 143 on the output shaft of the dehydration drive motor 142 drives the driven pulley 144 to rotate together with the fly ash cleaning inner shell 12 through the dehydration drive belt 145. Under the centrifugal force, the moisture in the domestic waste incineration fly ash is discharged through the small holes on the side wall of the fly ash cleaning inner shell 12. The moisture removed from the domestic waste incineration fly ash is then discharged through the cleaning wastewater discharge pipe 101.

[0126] The dehydrated domestic waste incineration fly ash is discharged from the matching hole 111 of the discharge bottom cover.

[0127] Under normal cleaning working conditions, the discharge bottom cover 112 is sealed in the discharge bottom cover matching hole 111, and the inner shell bottom sealing disk 118 is sealed in the lower end of the fly ash cleaning inner shell 12;

[0128] After the dehydration of the domestic waste incineration fly ash is completed, the deflection driving telescopic rod 115 drives the bottom cover deflection connecting plate 113 together with the discharge bottom cover 112 to deflect around the rotating axis of the first fixed hinge 114, so that the discharge bottom cover 112 is separated from the discharge bottom cover matching hole 111, and the inner shell bottom sealing disk 118 is also separated from the lower end of the fly ash cleaning inner shell 12. At this time, the discharge bottom cover matching hole 111 is in an open state, and the dehydrated domestic waste incineration fly ash in the fly ash cleaning inner shell 12 is discharged from the lower end of the fly ash cleaning inner shell 12 and discharged through the discharge bottom cover matching hole 111;

[0129] The cleaned and dehydrated domestic waste incineration fly ash forms fly ash cake;

[0130] S2. Moisture control of fly ash cake:

[0131] A delivery pump is used to feed the fly ash cake into each raw material input pipe 231. The fly ash cake is collected inside the raw material input shell 23. The servo motor drives the water evaporation drum 22 to rotate counterclockwise. When the water evaporation drum 22 passes through the raw material input shell 23, the fly ash cake inside the raw material input shell 23 is evenly spread on the surface of the water evaporation drum 22.

[0132] High-temperature steam is introduced into each steam heat exchanger 222. The heat dissipation end of the steam heat exchanger 222 transfers heat to the water evaporation drum 22 through the balanced heat conduction plate 221, heating and evaporating the fly ash cake applied on the surface of the water evaporation drum 22 to adjust the water content of the fly ash cake, thereby obtaining a heated and evaporated fly ash cake.

[0133] The high-temperature steam introduced into the steam heat exchanger 222 is the high-temperature steam generated by heating water with the tail gas of the tunnel kiln 50, which recycles the heat in the tail gas of the tunnel kiln 50 and saves energy.

[0134] Calculate the required moisture content of the fly ash cake based on the moisture content of the incoming sludge raw materials, so that the moisture content of the fly ash cake after heating and evaporation is controlled at 10%;

[0135] When the heated and evaporated fly ash cake passes through the raw material stripping scraper 24, the heated and evaporated fly ash cake smeared on the surface of the water evaporation drum 22 is stripped by the raw material stripping scraper 24, and the stripped heated and evaporated fly ash cake falls into the raw material collection box 211 below and is collected;

[0136] The exhaust gas conveying shell 253 is evacuated by an exhaust pump. Under the action of negative pressure, the exhaust gas generated by the evaporation of the fly ash cake enters the evaporation exhaust gas collection shell 251 through the exhaust gas collection hole 252. The exhaust gas then enters the exhaust gas conveying shell 253 through the exhaust gas conveying connecting pipe 254. Finally, the exhaust gas is discharged under the conveying action of the exhaust pump.

[0137] S3. Rolling the fly ash cake and sludge:

[0138] The fly ash cake and the sludge are respectively inputted into the interior of the mixing rolling shell 31 from the fly ash rolling input port 311 and the sludge rolling input port 312. The fly ash cake rolling roller 32 is driven to rotate by a servo motor. The heated and evaporated fly ash cake is rolled into a fly ash sheet with a thickness of d1 by the fly ash cake rolling roller 32. The sludge rolling roller 33 is driven to rotate by a servo motor. The sludge is rolled into a sludge sheet with a thickness of d2 by the sludge rolling roller 33.

[0139] The fly ash sludge sheet and the sewage sludge sheet are guided by the rolling material guide plate 37 and merged at the mixing rolling roller 34. The mixing rolling roller 34 is driven by a servo motor to rotate. The fly ash sludge sheet and the sewage sludge sheet are rolled into a mixed mud sheet with a thickness of d3 by the mixing rolling roller 34.

[0140] The mixing ratio of the two raw materials is adjusted by adjusting the rolling thickness of the fly ash mud sheet and the sludge sheet.

[0141] Where d1 is 1cm, d2 is 1cm, and d3 is 1cm;

[0142] The moisture content of the mixed mud flakes is controlled at 20%;

[0143] S4, continue mixed rolling:

[0144] The mixed mud flakes are divided into two equal parts and respectively input into the mixing rolling shell 31 through the fly ash rolling input port 311 and the sludge rolling input port 312. The mixed mud flakes are first rolled by the fly ash mud cake rolling roller 32 and the sludge rolling roller 33, and then rolled by the mixing rolling roller 34. "Step S4" is repeated 5 times until the fly ash mud flakes and the sludge flakes in the mixed mud flakes are evenly mixed together.

[0145] S5. Granulate the mixed mud flakes:

[0146] The mixed mud flakes are conveyed to the upper side of the granulation rolling drum 42 via the granulation raw material conveyor 43. The granulation rolling drum 42 is driven to rotate by a servo motor, and the conveying direction of the side where the two granulation rolling drums 42 are close to each other is downward. During the continuous rotation of the granulation rolling drums 42, the mixed mud flakes are drawn into the granulation die 420 between the granulation rolling drums 42. The mixed mud flakes are squeezed into regular shapes in the granulation die 420 to form mixed mud particles.

[0147] When the granulation mold 420 containing the mixed mud particles is located under the granulation rolling drum 42, the electromagnetic heating induction coil 422 is used to heat the granulation mold 420. The mixed mud particles are heated to generate water vapor, so that a layer of water vapor is formed between the mixed mud particles and the inner wall of the granulation mold 420, which is conducive to the mixed mud particles being separated from the granulation mold 420 more smoothly. The mixed mud particles separated from the granulation mold 420 fall onto the granulation material conveyor 44 and are transported out.

[0148] S6. Sintering the mixed mud particles:

[0149] The mixed mud particles are transported to a tunnel kiln for heating and sintering at a sintering temperature of 1250°C and a sintering time of 40 minutes, ultimately forming a sintered ceramsite product.

[0150] Example 8: This example describes a method for preparing sintered expanded clay from fly ash and sludge from incineration of domestic waste, and is based on a device for preparing sintered expanded clay from fly ash and sludge from incineration of domestic waste in the above-mentioned Example 2. On the basis of Example 7, in step S1, during the input of fly ash from incineration of domestic waste, a delivery pump delivers water to each fly ash suppression nozzle 162 through a pipeline, and each fly ash suppression nozzle 162 sprays water in the form of water mist, forming a water mist isolation wall on the top of the fly ash cleaning inner shell 12 to suppress the fly ash from floating around.

[0151] Example 9: This example describes a method for preparing sintered expanded clay from fly ash and sludge from the incineration of domestic waste, and is based on a device for preparing sintered expanded clay from fly ash and sludge from the incineration of domestic waste in the above-mentioned Example 3. On the basis of Example 8, in step S2, an auxiliary evaporation mechanism 26 is used to perform auxiliary heating and evaporation on the fly ash mud cake coated on the surface of the moisture evaporation roller 22. The light and heat energy generated by each thermal radiation lamp 263 is converged on the fly ash mud cake through the evaporation focusing lens 262, and the fly ash mud cake is auxiliary heated and evaporated.

[0152] Example 10: This example describes a method for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste. It is based on the apparatus for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste described in Example 4. In addition to Example 9, in step S2, when the water evaporation drum 22 passes through the cleaning shaft 271, the cleaning shaft 271 is driven by a motor to rotate, and the fly ash cake remaining on the surface of the water evaporation drum 22 is cleaned and peeled off by a cleaning brush 272. The cleaned residue falls into the residue collection box 212 below for collection.

[0153] The surface of the water evaporation drum 22 is cleaned to facilitate smearing new fly ash cake on the surface for heating and evaporation.

[0154] Example 11: This example describes a method for preparing sintered expanded clay from fly ash from incineration of domestic waste and sludge, and is based on a device for preparing sintered expanded clay from fly ash from incineration of domestic waste and sludge according to the above-mentioned Example 5. On the basis of Example 10, in step S3, the mixed mud sheets fall onto the rolling material conveyor 35. At this time, the servo motor drives the mixed rolling conveying slider 362 to move back and forth along the mixed rolling conveying track 361, so that the mixed mud sheets are folded back and forth and stacked on the rolling material conveyor 35. After the mixed mud sheets are stacked, the belt of the rolling material conveyor 35 itself is pneumatically driven to convey the stacked mixed mud sheets out from the mixed rolling conveying outlet 313.

[0155] Example 12: This example describes a method for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste. It is based on the apparatus for preparing sintered ceramsite from fly ash and sludge from the incineration of domestic waste described in Example 5. In addition to Example 11, in step S5, an auxiliary stripping mechanism 45 is used to assist in stripping the mixed mud particles in the granulation mold 420. When the granulation mold 420 containing the mixed mud particles passes through the pneumatic nozzle 454, the pneumatic control valve 453 is controlled to open, causing a high-speed airflow to be ejected from the pneumatic nozzle 454. Under the impact of the high-speed airflow, the mixed mud particles are separated from the granulation mold 420.

[0156] The air compressor provides jet power, and the high-pressure air pipe 451 is connected to the high-pressure air storage tank of the air compressor to provide compressed air to each pneumatic nozzle 454.

[0157] Example 13: The difference from Example 12 is that in step S2, the moisture content of the fly ash cake is controlled at 20%;

[0158] In step S3, d1 is 2 cm, d2 is 2 cm, and d3 is 2 cm;

[0159] The moisture content of the mixed mud flakes is controlled at 30%;

[0160] In step S4, repeat "step S4" 6 times;

[0161] In step S6, the sintering temperature is 1200° C. and the sintering time is 50 minutes.

[0162] Example 14: The difference from Example 12 is that in step S2, the moisture content of the fly ash cake is controlled at 30%;

[0163] In step S3, d1 is 3 cm, d2 is 3 cm, and d3 is 3 cm;

[0164] The moisture content of the mixed mud flakes is controlled at 40%;

[0165] In step S4, repeat "step S4" 7 times;

[0166] In step S6, the sintering temperature is 1150° C. and the sintering time is 60 min.

[0167] Example 15: The difference from Example 12 is that in step S2, the moisture content of the fly ash cake is controlled at 40%;

[0168] In step S3, d1 is 4 cm, d2 is 4 cm, and d3 is 4 cm;

[0169] The moisture content of the mixed mud flakes is controlled at 50%;

[0170] In step S4, repeat "step S4" 8 times;

[0171] In step S6, the sintering temperature is 1100° C. and the sintering time is 70 minutes.

[0172] Example 16: The difference from Example 12 is that in step S2, the moisture content of the fly ash cake is controlled at 50%;

[0173] In step S3, d1 is 5 cm, d2 is 5 cm, and d3 is 5 cm;

[0174] The moisture content of the mixed mud flakes is controlled at 60%;

[0175] In step S4, repeat "step S4" 10 times;

[0176] In step S6, the sintering temperature is 1050° C. and the sintering time is 80 min.

[0177] Example 17: The difference from Example 13 is that in step S2, the moisture content of the fly ash cake is controlled at 30%;

[0178] In step S3, the moisture content of the mixed mud flakes is controlled at 40%.

[0179] Example 18: The difference from Example 13 is that in step S2, the moisture content of the fly ash cake is controlled at 40%;

[0180] In step S3, the moisture content of the mixed mud flakes is controlled at 50%.

[0181] Example 19: The difference from Example 13 is that in step S2, the moisture content of the fly ash cake is controlled at 50%;

[0182] In step S3, the moisture content of the mixed mud flakes is controlled at 60%.

[0183] In practical applications of the present invention, the fly ash cleaning inner shell 12 can be disassembled and replaced in the position of the moisture evaporation drum 22. At this time, the inner wall of the fly ash cleaning inner shell 12 is evenly covered with dehydrated domestic waste incineration fly ash. The auxiliary evaporation mechanism 26 is used to heat and evaporate the domestic waste incineration fly ash in the fly ash cleaning inner shell 12. The light and heat energy generated by each heat radiation lamp 263 is concentrated on the side wall of the fly ash cleaning inner shell 12 through the evaporation focusing lens 262 to heat the domestic waste incineration fly ash inside it, thereby adjusting the moisture content of the domestic waste incineration fly ash.

[0184] In practical application of the present invention, after the fly ash sludge flakes and the sewage sludge flakes in the mixed sludge flakes are uniformly mixed and rolled together, the mixing rolling roller 34 is removed and replaced with the granulation rolling drum 42, and the granulation work is completed by using the components of the mixing rolling mechanism 30, specifically:

[0185] The mixed mud flakes continue to be input into the mixed rolling shell 31 through the fly ash rolling input port 311 or the sludge rolling input port 312, and after being rolled and transported by the fly ash mud cake rolling roller 32 or the sludge rolling roller 33, the mixed mud flakes are transported to the upper side of the granulation rolling drum 42 under the guidance of the rolling material guide plate 37. The granulation rolling drum 42 is driven to rotate by a servo motor, and the linear speed of the side of the granulation rolling drum 42 that is close to each other is downward. During the continuous rotation of the granulation rolling drum 42, the mixed mud flakes are drawn into the granulation mold 420 between the granulation rolling drums 42. The mixed mud sheets are extruded into regular shapes in the granulation mold 420 to form mixed mud particles; when the granulation mold 420 containing the mixed mud particles is on the lower side of the granulation rolling drum 42, the granulation mold 420 is heated by the electromagnetic heating induction coil 422. After the mixed mud particles are heated, water vapor is generated, so that a layer of water vapor is formed between the mixed mud particles and the inner wall of the granulation mold 420, which is conducive to the mixed mud particles to be more smoothly separated from the granulation mold 420. The mixed mud particles separated from the granulation mold 420 fall on the rolling material conveyor 35, and finally the mixed mud particles are transported out.

Claims

1. A device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste, characterized in that: It comprises a fly ash cleaning mechanism (10) for cleaning fly ash from domestic waste incineration, a moisture control mechanism (20) for heating and evaporating the cleaned fly ash from domestic waste incineration, a mixing and rolling mechanism (30) for rolling the heated and evaporated fly ash from domestic waste incineration and sludge, a granulating mechanism (40) for granulating the rolled mixture of fly ash from domestic waste incineration and sludge, and a tunnel kiln (50) for sintering the granulated mixture; The fly ash cleaning mechanism (10) comprises a cleaning mechanism outer shell (11), a fly ash cleaning inner shell (12) is coaxially and rotatably connected inside the cleaning mechanism outer shell (11), a plurality of small holes communicating with each other are provided on the side wall of the fly ash cleaning inner shell (12), a discharge bottom cover matching hole (111) communicating with each other is provided at the bottom of the cleaning mechanism outer shell (11), and a discharge bottom cover (112) is connected inside the discharge bottom cover matching hole (111); A fly ash conveying pipe (131) and a cleaning water conveying pipe (132) are fixed on the top of the cleaning mechanism housing (11); The moisture control mechanism (20) comprises a control mechanism housing (21), a moisture evaporation roller (22) is rotatably connected inside the control mechanism housing (21), a raw material input shell (23) is fixed on the upper side of the moisture evaporation roller (22) inside the control mechanism housing (21), and a raw material stripping scraper (24) is fixed on the lower side of the moisture evaporation roller (22) inside the control mechanism housing (21); A raw material collection box (211) with an upward opening is provided at the bottom of the inner side of the regulating mechanism housing (21); A plurality of balanced heat conduction plates (221) are fixed on the inner side wall of the water evaporation drum (22), and a steam heat exchanger (222) is fixed on each of the balanced heat conduction plates (221); The mixing rolling mechanism (30) comprises a mixing rolling shell (31), in which two symmetrically arranged fly ash cake rolling rollers (32), two symmetrically arranged sludge rolling rollers (33) and two symmetrically arranged mixing rolling rollers (34) are rotatably connected; A rolling material conveyor (35) is provided at the bottom of the mixed rolling shell (31); The granulation mechanism (40) comprises a granulation mechanism housing (41), two symmetrically arranged granulation rolling rollers (42) are rotatably connected in the granulation mechanism housing (41), a plurality of granulation mold fixing holes (421) communicating with each other are provided on the side wall of the granulation rolling roller (42), and a granulation mold (420) is fixed in the granulation mold fixing hole (421); A granulation raw material conveyor (43) is fixed above the granulation rolling drum (42) in the granulation mechanism housing (41), and a granulation raw material conveyor (44) is fixed below the granulation rolling drum (42) in the granulation mechanism housing (41).

2. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: A bottom cover deflection connecting plate (113) is fixed on the discharge bottom cover (112), and the bottom cover deflection connecting plate (113) is connected to the outer side wall of the cleaning mechanism housing (11) via a first fixed hinge (114), and a deflection driving telescopic rod (115) is hinged between the other end of the bottom cover deflection connecting plate (113) and the outer side wall of the cleaning mechanism housing (11); The discharge bottom cover (112) is rotatably connected to a sealing disk (118) at the bottom of the inner shell on one side of the cleaning mechanism shell (11); A bottom cover sealing matching ring (119) is fixed in the matching hole (111) of the discharge bottom cover, and the discharge bottom cover (112) is sealingly sleeved with the bottom cover sealing matching ring (119).

3. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: A rotating matching ring (121) is coaxially fixed inside the cleaning mechanism outer shell (11), and a rotating support ring (122) is fixed on the outer side wall of the fly ash cleaning inner shell (12), and the rotating support ring (122) is rotatably sleeved with the rotating matching ring (121); A rotating drive accommodating shell (141) is fixed on the outer wall of the cleaning mechanism housing (11), and the rotating drive accommodating shell (141) is communicated with the interior of the cleaning mechanism housing (11). A dehydration driving motor (142) is fixed in the rotating drive accommodating shell (141), and a driving pulley (143) is fixed on the output shaft of the dehydration driving motor (142). A driven pulley (144) is fixed on the outer surface of the fly ash cleaning inner shell (12), and a dehydration driving belt (145) is connected between the driving pulley (143) and the driven pulley (144).

4. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: A cleaning and stirring mechanism (15) is provided on the top of the cleaning mechanism shell (11), and the cleaning and stirring mechanism (15) comprises a cleaning and stirring shaft (151) rotatably connected to the top of the cleaning mechanism shell (11) and vertically extending to the inside of the fly ash cleaning inner shell (12), and a plurality of cleaning and stirring short rods (152) are fixed on the cleaning and stirring shaft (151); A stirring drive accommodating shell (153) is fixed on the top of the cleaning mechanism housing (11); the upper end of the cleaning stirring shaft (151) extends into the interior of the stirring drive accommodating shell (153); and a stirring drive motor (154) for driving the cleaning stirring shaft (151) to rotate is fixed in the stirring drive accommodating shell (153).

5. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: A fly ash suppression mechanism (16) is provided at the top of the cleaning mechanism housing (11), and the fly ash suppression mechanism (16) comprises a fly ash suppression support ring (161) fixed at the top of the cleaning mechanism housing (11), and a plurality of fly ash suppression nozzles (162) are fixed on the inner side surface of the fly ash suppression support ring (161).

6. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: An evaporative waste gas discharge mechanism (25) is provided inside the regulating mechanism housing (21), and the evaporative waste gas discharge mechanism (25) comprises an evaporative waste gas collection shell (251) fixed inside the regulating mechanism housing (21) and located on one side of the water evaporation roller (22), and the evaporative waste gas collection shell (251) has a plurality of waste gas collection through holes (252) communicating with each other on one side close to the water evaporation roller (22), and a waste gas conveying shell (253) is fixed on the top of the regulating mechanism housing (21), and the waste gas conveying shell (253) is connected to the evaporative waste gas collection shell (251) via a waste gas conveying connecting pipe (254).

7. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: An auxiliary evaporation mechanism (26) is arranged inside the regulating mechanism housing (21), and the auxiliary evaporation mechanism (26) comprises a plurality of auxiliary evaporation containing shells (261) fixed inside the regulating mechanism housing (21) and located on one side of the water evaporation roller (22), each of the auxiliary evaporation containing shells (261) having a plurality of lens fixing holes (2611) communicating with each other on one side close to the water evaporation roller (22), an evaporation focusing lens (262) being fixed inside the lens fixing hole (2611), and a plurality of heat radiation lamps (263) being fixed inside each of the auxiliary evaporation containing shells (261).

8. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 6, characterized in that: The regulating mechanism housing (21) is located at the other side of the water evaporation roller (22) and is rotatably connected to a cleaning shaft (271), the cleaning shaft (271) being provided with a cleaning brush (272), and a residue collection box (212) with an upward opening is provided at the bottom of the regulating mechanism housing (21) and located directly below the cleaning shaft (271).

9. The device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste according to claim 1, characterized in that: An auxiliary stripping mechanism (45) is provided in the granulation mechanism housing (41) on one side away from each other of the two granulation rolling rollers (42), and the auxiliary stripping mechanism (45) includes a high-pressure air supply pipe (451), and a plurality of stripping ventilation pipes (452) are fixed to the side of the high-pressure air supply pipe (451), one end of the stripping ventilation pipe (452) is connected to the high-pressure air supply pipe (451), and a pneumatic control valve (453) is provided on the stripping ventilation pipe (452), and a pneumatic nozzle (454) is fixed to the other end of the stripping ventilation pipe (452).

10. A method for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste, based on the device for preparing sintered ceramsite from fly ash and sludge from incineration of domestic waste as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Fly ash cleaning: The fly ash from the incineration of domestic waste is conveyed to the fly ash conveying pipe (131) by a conveyor, and the fly ash from the incineration of domestic waste falls into the fly ash cleaning inner shell (12) through the fly ash conveying pipe (131), and clean water is conveyed to the cleaning water conveying pipe (132) by a conveying pump, and the clean water falls into the fly ash cleaning inner shell (12) through the cleaning water conveying pipe (132) and mixes with the fly ash from the incineration of domestic waste; A mixture of domestic waste incineration fly ash and water in the fly ash cleaning inner shell (12) is stirred and cleaned; After the domestic waste incineration fly ash is cleaned, the cleaning wastewater is discharged; Then, the cleaned domestic waste incineration fly ash in the fly ash cleaning inner shell (12) is dehydrated. By rotating the fly ash cleaning inner shell (12), water in the domestic waste incineration fly ash is discharged through small holes on the side wall of the fly ash cleaning inner shell (12) under the action of centrifugation; The discharge bottom cover (112) is opened to discharge the dehydrated domestic waste incineration fly ash from the matching hole (111) of the discharge bottom cover. The cleaned and dehydrated domestic waste incineration fly ash forms fly ash mud cake; S2. Moisture control of fly ash mud cake: The fly ash cake is input into the raw material input shell (23) by using a delivery pump, and the water evaporation drum (22) is driven by a servo motor to rotate counterclockwise. When the water evaporation drum (22) passes through the raw material input shell (23), the fly ash cake inside the raw material input shell (23) is evenly smeared on the surface of the water evaporation drum (22); High-temperature steam is introduced into each steam heat exchanger (222), and the heat dissipation end of the steam heat exchanger (222) transfers heat to the water evaporation roller (22) through the balanced heat conduction plate (221), and the fly ash mud cake coated on the surface of the water evaporation roller (22) is heated and evaporated to adjust the water content of the fly ash mud cake, thereby obtaining the heated and evaporated fly ash mud cake; According to the moisture content of the incoming sludge raw materials, the required moisture content of the fly ash cake is calculated, so that the moisture content of the fly ash cake after heating and evaporation is controlled at 10-50%; When the heated and evaporated fly ash cake passes through the raw material stripping scraper (24), the heated and evaporated fly ash cake smeared on the surface of the water evaporation roller (22) is stripped by the raw material stripping scraper (24), and the stripped heated and evaporated fly ash cake falls into the raw material collection box (211) below and is collected; S3. Rolling the fly ash cake and sludge: The fly ash cake rolling roller (32) is driven to rotate by a servo motor, and the heated and evaporated fly ash cake is rolled into a fly ash sheet with a thickness of d1 by the fly ash cake rolling roller (32), and the sludge rolling roller (33) is driven to rotate by a servo motor, and the sludge is rolled into a sludge sheet with a thickness of d2 by the sludge rolling roller (33); The fly ash mud sheet and the sewage sludge sheet are combined at a mixing rolling roller (34), and the mixing rolling roller (34) is driven to rotate by a servo motor. The fly ash mud sheet and the sewage sludge sheet are rolled into a mixed mud sheet with a thickness of d3 by the mixing rolling roller (34); Among them, d1 is 1 to 5 cm, d2 is 1 to 5 cm, and d3 is 1 to 5 cm; The moisture content of the mixed mud flakes is controlled at 20-60%; S4, continue mixed rolling: The mixed mud flakes are equally divided into two parts, respectively rolled by a fly ash mud cake rolling roller (32) and a sludge rolling roller (33), and then combined and rolled by a mixing rolling roller (34), and "step S4" is repeated 5 to 10 times until the fly ash mud flakes and the sludge flakes in the mixed mud flakes are uniformly mixed together; S5, granulating the mixed mud flakes: The mixed mud flakes are conveyed to the upper side of the granulation rolling roller (42) via the granulation raw material conveyor (43). The granulation rolling roller (42) is driven to rotate by a servo motor, and the conveying direction of the side where the two granulation rolling rollers (42) are close to each other is downward. During the continuous rotation of the granulation rolling rollers (42), the mixed mud flakes are rolled into the granulation mold (420) between the granulation rolling rollers (42). The mixed mud flakes are squeezed into a regular shape in the granulation mold (420) to form mixed mud particles. The mixed mud particles separated from the granulation mold (420) fall onto the granulation material conveyor (44) to transport the mixed mud particles out; S6, sintering the mixed mud particles: The mixed mud particles are transported to a tunnel kiln (50) for heating and sintering. The sintering temperature is 1050-1250°C and the sintering time is 40-90 minutes, thereby finally forming a sintered ceramsite product.

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