Synergistic innocent treatment and disposal system for multi-element solid wastes such as phosphogypsum, urban and rural sludge and organic soil

Abstract

The invention relates to a collaborative harmless treatment system for multi-element solid wastes such as phosphogypsum, urban and rural sludge, organic soil and the like. Comprising premixing, proportioning, blending, aging, granulating and material conveying of multi-element solid waste raw materials, an inner kiln high-temperature melting ceramic-making solid waste treatment system, an outer kiln waste heat calcination utilization system, a high-temperature ceramsite waste heat utilization calcination system, a high-temperature flue gas waste heat calcination pipeline and an ardealite pretreatment device. When solid waste treatment is carried out, firstly, phosphogypsum treated by the production system, waste soil and other multi-element solid waste raw materials are subjected to premixing, proportioning, blending, aging and granulation, and then finished product granulation blanks are put into an inner kiln high-temperature melting ceramic-making solid waste treatment system for high-temperature melting ceramic-making; a large amount of heat generated by the inner kiln can be effectively utilized through the treatment system, so that the heat is utilized in a variety of ways and is more environment-friendly and efficient, pollution of urban and rural sludge, industrial solid waste, agriculture and forestry solid waste and the like to the environment is reduced on a large scale, and the utilization level of renewable resources is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of solid waste harmless treatment and disposal, in particular to a system for the synergistic harmless treatment and disposal of phosphogypsum, urban and rural sludge, organic soil and other multi-component solid waste. BACKGROUND

[0002] Phosphogypsum is a by-product of the production of wet-process phosphoric acid, and is one of the largest solid waste emissions in the chemical industry. On average, 3.75 tons of phosphogypsum are produced for every ton of phosphorus fertilizer. Most of the phosphogypsum is treated by open-air stacking and dumping into the sea, while the phosphogypsum contains a large amount of harmful substances, which not only occupies a large amount of land resources, but also pollutes our living environment. This largely restricts the resource utilization of phosphogypsum and continuously affects the environment on which human beings depend. Therefore, if a series of physical and chemical methods can be used to apply phosphogypsum to related fields, it will have important practical significance for the resource utilization of phosphogypsum and the improvement of the environment.

[0003] At present, the production of urban sludge is huge, and the depth and breadth of environmental hazards are considered to be a kind of waste with great pollution hazards due to the high content of pollutants. The harm of urban sludge to the environment mainly lies in the fact that the sludge contains a large amount of pollutants of various types. In the process of treatment and disposal of urban sludge, various technical methods are mainly relied on to realize the reduction, harmlessness, resource utilization and stabilization of sludge. Among them, the subsequent treatment after the concentration and dewatering of sludge is an important way to realize the reduction of sludge. The water content in the residual sludge is as high as 99% or more, and the removal of water becomes a key factor restricting the comprehensive utilization of sludge.

[0004] Industrial production and resident life will produce industrial, agricultural and forestry solid waste such as waste soil, sludge, phosphogypsum, industrial tailings, agricultural and forestry solid waste, etc. These solid waste contains harmful substances, and the existing treatment method is landfill treatment or open-air stacking, which not only pollutes the environment, but also wastes resources. A treatment and recycling system is needed to harmlessly treat and recycle the above-mentioned industrial, agricultural and forestry solid waste. SUMMARY

[0005] In order to reduce the pollution of industrial production and resident life to the environment, the present application provides a system for the synergistic harmless treatment and disposal of phosphogypsum, urban and rural sludge, organic soil and other multi-component solid waste.

[0006] The system for the synergistic harmless treatment and disposal of phosphogypsum, urban and rural sludge, organic soil and other multi-component solid waste provided by the present application adopts the following technical solution: The multi-element solid waste raw material pre-mixing, proportioning, mixing, aging, granulating and material conveying system can pre-mix, proportion, mix, age and granulate the multi-element solid waste raw material. The inner kiln high-temperature melting ceramic solid waste treatment system can directly calcine the multi-element solid waste raw material. The outer kiln waste heat calcination utilization system can indirectly calcine the multi-element solid waste raw material. The high-temperature ceramic particle waste heat utilization calcination system can indirectly calcine the multi-element solid waste raw material. The high-temperature flue gas waste heat calcination pipeline can indirectly calcine the multi-element solid waste raw material. The phosphogypsum pretreatment device can indirectly calcine the multi-element solid waste raw material.

[0007] When the multi-element solid waste harmless treatment and disposal system is used to treat solid waste, the phosphogypsum treated by the production system is pre-mixed, proportioned, mixed, aged and granulated with multi-element solid waste raw materials such as waste soil, organic soil and agricultural and forestry waste soil, and the finished granulated blank is then put into the inner kiln high-temperature melting ceramic solid waste treatment system for high-temperature melting ceramic production. During the process, the inner kiln generates a large amount of heat, which is effectively utilized through the outer kiln waste heat calcination utilization system, the high-temperature ceramic particle waste heat utilization calcination system, the high-temperature flue gas waste heat calcination pipeline and the phosphogypsum pretreatment device. The multi-element solid waste harmless treatment and disposal system can utilize heat in multiple ways, is more environmentally friendly and efficient, and to some extent, the system can reduce the environmental pollution caused by urban and rural sludge, industrial solid waste and agricultural and forestry solid waste, and improve the utilization level of renewable resources.

[0008] Optionally, the multi-element solid waste raw material pre-mixing, proportioning, mixing, aging, granulating and material conveying system comprises: A stirring device; A granulating device; A feeding device that can feed solid waste, the feeding device comprising a crusher, a bidirectional conveyor belt and an aging warehouse, one end of the bidirectional conveyor belt being connected to the stirring device and the other end being connected to the aging warehouse, the solid waste being sent to the granulating device for granulation after being fed into the stirring device by the feeding device; Meanwhile, the inner kiln high-temperature melting ceramic solid waste treatment system comprises: An inner kiln connected to the granulating device, the inner kiln being capable of calcining the ceramic particles manufactured by the granulating device, the inner kiln being externally sleeved with an outer kiln, the inner kiln being capable of generating a large amount of heat during calcination, and the inner kiln being further provided with a waste heat pretreatment kiln outside, the waste heat pretreatment kiln being capable of pretreating byproduct gypsum using the hot gas between the inner kiln and the outer kiln; Meanwhile, the indirect calcination system is formed by combination of the outer kiln waste heat calcination utilization system, the high-temperature ceramic bead waste heat utilization calcination system, the high-temperature flue gas waste heat calcination pipeline and the phosphogypsum pretreatment device, and the indirect calcination system comprises: a mixed calcination kiln connected with the inner kiln, the mixed calcination kiln being capable of calcining mixed ceramic beads and by-product gypsum; a smoke chamber for processing flue gas formed during calcination of the inner kiln, the smoke chamber being provided with a by-product gypsum calcination pipeline; a phosphogypsum pretreatment device arranged at an output end of the smoke chamber, the phosphogypsum pretreatment device being a drying kiln, and the drying kiln being capable of pretreating by-product gypsum.

[0009] By adopting the above technical scheme, the harmless treatment and disposal system of the application is arranged in combination of the stirring device, the granulating device, the feeding device, the inner kiln, the outer kiln, the mixed calcination kiln, the smoke chamber and the phosphogypsum pretreatment device, so that when the solid waste such as phosphogypsum, urban and rural sludge and organic soil is treated, the solid waste is firstly fed by the feeding device, the crushing device matched with the feeding device crushes the solid waste, the crushed solid waste is conveyed to the stirring device and the granulating device under the action of the transmission belt, the solid waste is stirred by the stirring device, the granulating device can manufacture the solid waste into a brick, the granular ceramic beads are sent into the inner kiln for calcination to obtain high-temperature aggregate ceramic beads, a large amount of system waste heat is generated during calcination of the high-temperature aggregate ceramic beads, and the high-temperature aggregate ceramic beads can be sent into the mixed calcination kiln together with the by-product gypsum for calcination of the by-product gypsum by using the high-temperature aggregate ceramic beads.

[0010] Meanwhile, a large amount of system waste heat is generated during calcination of the inner kiln, and the waste heat between the inner kiln and the outer kiln can be extracted into the phosphogypsum pretreatment device to pretreat the phosphogypsum, so that the system waste heat can be fully utilized.

[0011] Meanwhile, flue gas is generated during calcination of the inner kiln, the flue gas needs to be subjected to dust removal and ash removal in the smoke chamber before being discharged, the temperature of the flue gas just coming out of the inner kiln is very high, the smoke chamber as a whole is a high-temperature environment, the smoke chamber has a large amount of waste heat, and the by-product gypsum calcination pipeline is arranged in the smoke chamber to calcine the by-product gypsum, so that the by-product gypsum is isolated from the flue gas during calcination and does not affect the dust removal and ash removal effect of the smoke chamber.

[0012] Finally, the flue gas output from the smoke chamber still has a high temperature, so the flue gas output from the smoke chamber is introduced into the phosphogypsum pretreatment device, and the high-temperature flue gas is used to pretreat the by-product gypsum in the phosphogypsum pretreatment device, so that different types of by-product gypsum products can be produced by adjusting the temperature.

[0013] In summary, it can be seen that the solid waste harmless treatment and disposal system has four functions. First, the heat generated during calcination of high-temperature aggregate ceramsite can be used to calcine by-product gypsum in the mixed calcination kiln. Second, the large amount of waste heat generated during calcination in the inner kiln can be used to pretreat phosphogypsum in the phosphogypsum pretreatment device by extracting the waste heat between the inner kiln and the outer kiln. Third, a large amount of waste heat is generated from the flue gas produced during calcination in the inner kiln, so the by-product gypsum can be calcined in the smoke chamber. Fourth, the flue gas output from the smoke chamber still has a high temperature, so the high-temperature flue gas can be used to pretreat the by-product gypsum in the phosphogypsum pretreatment device. The present application reduces the pollution of industrial and agricultural solid waste to the environment to some extent.

[0014] Optionally, a sandwich pipe can be arranged between the inner kiln and the outer kiln, which can use the hot gas between the inner kiln and the outer kiln to pretreat the by-product gypsum.

[0015] By adopting the above technical solution, in addition to extracting the waste heat between the inner kiln and the outer kiln into the phosphogypsum pretreatment device to pretreat the phosphogypsum, a sandwich pipe can be arranged between the inner kiln and the outer kiln to directly pretreat the phosphogypsum.

[0016] Optionally, the outer kiln is arranged in multiple sections, and the by-product gypsum calcination pipe is also arranged in multiple sections. The multiple sections of the outer kiln and the multiple sections of the by-product gypsum calcination pipe correspond one-to-one, and each section of the outer kiln is provided with an air extraction device, a temperature monitoring device, and a temperature adjusting device. The temperature monitoring device can monitor the temperature of the outer kiln and is electrically connected to the temperature adjusting device. The temperature adjusting device is also electrically connected to the air extraction device.

[0017] By adopting the above technical solution, the outer kiln and the by-product gypsum calcination pipe are arranged in multiple sections, which can facilitate the heating and production of different types of by-product gypsum products, effectively improving the application range of the system. The temperature monitoring device and the temperature adjusting device can effectively control the temperature of different types of by-product gypsum products, thereby effectively controlling the quality of the products.

[0018] Optionally, the output end of the smoke chamber is further provided with a flue gas purification device, the flue gas purification device comprises a bag dust removal device, a dust collecting box is arranged on the bag dust removal device, and the dust collecting box is detachably connected with the bag dust removal device.

[0019] By adopting the above technical scheme, the environmental protection performance of the system is effectively enhanced, the bag dust removal device is convenient to clean, and the environmental protection performance of the system is effectively improved.

[0020] Optionally, a plurality of drying kilns are arranged, and a cooling device is arranged between each of the plurality of drying kilns and the smoke chamber, so that the plurality of drying kilns can produce a plurality of types of by-product gypsum.

[0021] By adopting the above technical scheme, the cooling device can effectively improve the temperature control, thereby effectively improving the quality control of the by-product gypsum product, and the cyclone device can effectively gather the flue gas, thereby effectively improving the effect of the drying kiln.

[0022] Optionally, the output end of the smoke chamber is further provided with a heat exchanger.

[0023] By adopting the above technical scheme, the heat exchanger can be arranged in the smoke chamber for domestic heating and product steaming.

[0024] Optionally, the output end of the granulating device is further provided with a screening device, and the screening device can screen mixed ceramsite and by-product gypsum of different particle sizes.

[0025] By adopting the above technical scheme, the screening device is arranged, and the efficiency of the solid waste harmless treatment and disposal system is effectively improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects: When the multi-element solid waste harmless treatment and disposal system is used for treating solid waste, the phosphogypsum treated by the production system is pre-mixed, proportioned, mixed, aged, and granulated with multi-element solid waste raw materials such as waste soil, organic soil, and agricultural and forestry waste soil, and then the finished granulated body is put into an inner kiln for high-temperature melting and ceramic solid waste material treatment system for high-temperature melting and ceramic production. The solid waste harmless treatment and disposal system of the application has four functions. Firstly, the heat of high-temperature aggregate ceramsite in the calcination process can be directly used to calcine by-product gypsum in the mixed calcination kiln. Secondly, a large amount of waste heat generated during the calcination of the inner kiln can be used to pre-treat the phosphogypsum in the phosphogypsum pretreatment device by extracting the waste heat between the inner kiln and the outer kiln. Thirdly, a large amount of waste heat is generated from the flue gas generated during the calcination process of the inner kiln, so the by-product gypsum can be calcined in the smoke chamber. Fourthly, the flue gas output from the smoke chamber still has a relatively high temperature, so the by-product gypsum can be pretreated in the phosphogypsum pretreatment device by high-temperature flue gas. The application reduces the pollution of industrial and agricultural solid waste to the environment to a certain extent. By setting the outer kiln and the by-product gypsum calcination pipe into multiple sections, different types of by-product gypsum products can be heated and produced, effectively improving the application range of the system. The temperature monitoring device and the temperature adjusting device can effectively control the temperature of different types of by-product gypsum products, thereby effectively controlling the quality of the products. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the system logic diagram of the multi-element solid waste synergistic harmless treatment and disposal system of phosphogypsum, urban and rural sludge, and organic soil according to the embodiment of the application.

[0028] Figure 2 is the detailed diagram of the feeding device of the multi-element solid waste synergistic harmless treatment and disposal system of phosphogypsum, urban and rural sludge, and organic soil according to the embodiment of the application.

[0029] Figure 3 is a schematic diagram of the multi-section setting of the inner kiln and the outer kiln of the multi-element solid waste synergistic harmless treatment and disposal system of phosphogypsum, urban and rural sludge, and organic soil according to the embodiment of the application.

[0030] BRIEF DESCRIPTION OF DRAWINGS 1, stirring device; 2, granulating device; 3, feeding device; 31, crusher; 32, bidirectional conveyor belt; 33, aging warehouse; 4, inner kiln; 5, outer kiln; 6, waste heat pretreatment kiln; 7, mixed calcination kiln; 8, smoke chamber; 9, phosphogypsum pretreatment device; 91, drying kiln; 10, interlayer pipeline; 11, air extraction device; 12, temperature monitoring device; 13, temperature adjusting device; 14, flue gas purification device; 141, bag dust removal device; 15, dust collection box; 16, cooling device; 17, heat exchanger; 18, screening device. DETAILED DESCRIPTION

[0031] The application will be described in further detail below with reference to the accompanying drawings. Figures 1-3 The application will be described in further detail below with reference to the accompanying drawings.

[0032] The embodiment of the application discloses a multi-component solid waste harmless treatment and disposal system for phosphogypsum, urban and rural sludge, organic soil and the like.

[0033] It should be noted that in the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0034] It should also be noted that the application is supported by the theory of waste heat. In actual production, the temperature of freshly calcined phosphogypsum ceramic particles is about 1000°, the flue gas temperature is 350°-550°, the bag dust removal requires less than 200°, and the phosphogypsum treatment temperature is greater than 80°. Therefore, these heat can be utilized. This is relatively easy for a person skilled in the art to understand, and therefore will not be described in detail in the subsequent embodiments.

[0035] Specifically, referring to Figure 1 A multi-component solid waste harmless treatment and disposal system for phosphogypsum, urban and rural sludge, organic soil and the like, which comprises multi-component solid waste raw material pre-mixing, proportioning, mixing, aging, granulation, material conveying, inner kiln high-temperature melting ceramic solid waste treatment system, outer kiln waste heat calcination utilization system, high-temperature ceramic particle waste heat utilization calcination system, high-temperature flue gas waste heat calcination pipeline, and phosphogypsum pretreatment device 9. When the multi-component solid waste harmless treatment and disposal system of the application is used for solid waste treatment, the phosphogypsum treated by the production system is first pre-mixed, proportioned, mixed, aged, and granulated with multi-component solid waste raw materials such as waste soil, organic soil, and agricultural and forestry waste soil. The finished granulation blank is then put into the inner kiln 4 high-temperature melting ceramic solid waste treatment system for high-temperature melting ceramic production. During the process, the inner kiln 4 generates a large amount of heat, which is effectively utilized through the outer kiln waste heat calcination utilization system, the high-temperature ceramic particle waste heat utilization calcination system, the high-temperature flue gas waste heat calcination pipeline, and the phosphogypsum pretreatment device 9. The multi-component solid waste harmless treatment and disposal system of the application can utilize heat in multiple ways, is more environmentally friendly and efficient, and to some extent, the system can reduce the environmental pollution of urban and rural sludge, industrial solid waste, and agricultural and forestry solid waste, and improve the utilization level of renewable resources.

[0036] Specifically, in the embodiments of the present application, the stirring device 1 adopts a horizontal spiral belt type stirrer. In other embodiments, a double-shaft paddle stirrer, a forced stirrer, a planetary stirrer, and a continuous stirrer can also be used, which are preferred embodiments of the present application.

[0037] Specifically, in the embodiments of the present application, the granulating device 2 adopts an extrusion granulator. In other embodiments, a disc granulator, a rotary drum granulator, a disc-rotary drum combined granulator, a fluidized bed granulator, and a high-shear granulator can also be used, which are preferred embodiments of the present application.

[0038] Specifically, referring to Figure 1 and Figure 2 , the feeding device 3 can feed the solid waste in the embodiments of the present application. The feeding device 3 includes a crusher 31, a bidirectional conveying belt 32, and an aging warehouse 33, as well as a material level detection device. One end of the bidirectional conveying belt 32 is connected with the stirring device 1, and the other end is connected with the aging warehouse 33. The solid waste is sent to the stirring device 1 by the feeding device 3 and then to the granulating device 2 for granulation.

[0039] When the feeding device 3 is used, scenario one is that the bidirectional feeding belt feeds the material to the material collecting bin. The material level detection device detects that the material level exceeds the upper limit, the bidirectional feeding belt is adjusted to reverse direction, and the material is sent to the aging warehouse 33 for storage and aging. The granulator continuously consumes the material in the material collecting bin, and the material level detection device detects that the material level is below the lower limit, the bidirectional feeding belt is adjusted to send the material to the material collecting bin until the material level reaches the upper limit, and then the direction is reversed again. This ensures that the granulator can continuously and continuously produce, ensures the quality of the product, improves the production efficiency, and reduces the production cost. Scenario two is that when the external environment is not good (rainy and snowy weather), the feeding box cannot supply material for production, and the third feeding belt is started to take out the standby material stored in the aging warehouse 33 and convey it to the material collecting bin for production. The feeding and aging system of the present application can realize continuous feeding without interruption, ensure that the product is more homogeneous and stable, improve the production efficiency, save electricity, and reduce the production cost.

[0040] After the solid waste is fed, stirred, and granulated by the above-mentioned feeding device 3, stirring device 1, and granulating device 2, the ceramsite is sent to the inner kiln 4 for calcination.

[0041] At the same time, the output end of the granulating device 2 is also provided with a screening device 18, which can screen mixed ceramsite of different particle sizes and by-product gypsum.

[0042] The screening device 18 effectively improves the efficiency of the solid waste harmless treatment and disposal system of the present application.

[0043] The inner kiln 4, outer kiln 5, mixed calcination kiln 7, smoke chamber 8, and phosphogypsum pretreatment device 9 of the present application will be described in detail below.

[0044] Specifically, in the embodiment of the present application, the inner kiln 4 is connected with the granulating device 2, the inner kiln 4 can calcine the ceramsite manufactured by the granulating device 2, the outer kiln 5 is sleeved outside the inner kiln 4, a large amount of heat can be generated when the inner kiln 4 is calcined, and the waste heat pretreatment kiln 6 is further arranged outside the inner kiln 4, the waste heat pretreatment kiln 6 can use the hot gas between the inner kiln 4 and the outer kiln 5 to pretreat the by-product gypsum. The by-product gypsum is calcined by using the waste heat of the ceramsite, and then the mixed material after calcination is sorted, the ceramsite and the gypsum powder are sorted out and respectively discharged.

[0045] At the same time, the present application also provides an embodiment using the waste heat of the ceramsite, the interlayer pipeline 10 can be further arranged between the inner kiln 4 and the outer kiln 5, the interlayer pipeline 10 can use the hot gas between the inner kiln 4 and the outer kiln 5 to pretreat the by-product gypsum.

[0046] In addition to the waste heat between the inner kiln 4 and the outer kiln 5 being extracted into the phosphogypsum pretreatment device 9 to pretreat the phosphogypsum, the interlayer pipeline 10 can be arranged between the inner kiln 4 and the outer kiln 5 to directly pretreat the phosphogypsum, and the gas between the inner kiln 4 and the outer kiln 5 is isolated from the outer kiln 5, which can effectively avoid the gypsum powder from leaking.

[0047] Further, referring to Figure 1 and Figure 3 , the outer kiln 5 is arranged in multiple sections, the by-product gypsum calcination pipe is arranged in multiple sections, the multiple-section outer kiln 5 corresponds to the multiple-section by-product gypsum calcination pipe one by one, and the multiple-section outer kiln 5 is provided with the gas extraction device 11. In the embodiment of the present application, the outer kiln 5 is arranged in three sections, the inner kiln 4 is arranged in three sections, and the temperature of heating corresponding to each section is different. Specifically, the first section is used for heating the gypsum product of 120°-180°, the second section is used for heating the gypsum product of 160°-280°, and the third section is used for heating the gypsum product of 240°-460°.

[0048] The outer kiln 5 and the by-product gypsum calcination pipe are arranged in multiple sections, which can facilitate the heating production of different types of by-product gypsum products, and effectively improve the application range of the system.

[0049] Further, the multi-section external kiln 5 is provided with a temperature monitoring device 12 and a temperature adjusting device 13. The temperature monitoring device 12 can monitor the temperature of the external kiln 5 and is electrically connected to the temperature adjusting device 13. The temperature adjusting device 13 is also electrically connected to the air extraction device 11. In the embodiment of the present application, the temperature monitoring device 12 is an infrared thermometer, and the temperature adjusting device 13 is a variable frequency air blower. In other embodiments, the temperature adjusting device 13 can also be a thermocouple temperature sensor, a wireless temperature sensor, or a fiber-optic temperature sensor. The temperature adjusting device 13 can also be an air damper, a PID control system, an electric heater adjustment system, or a gas valve regulator. These are all preferred embodiments of the present application.

[0050] The temperature monitoring device 12 and the temperature adjusting device 13 can effectively control the temperature of different types of by-product gypsum products, thereby effectively controlling the quality of the products.

[0051] The mixed calcination kiln 7 is connected to the internal kiln 4. The mixed calcination kiln 7 can calcine the mixed ceramsite and by-product gypsum. That is, in order to fully utilize the waste heat of the high-temperature aggregate ceramsite, the high-temperature aggregate ceramsite and the by-product gypsum are sent together to the mixed calcination kiln 7. Then, the finished calcined mixture is sorted to separate the ceramsite and the gypsum powder, which are then packaged and shipped.

[0052] Specifically, a large amount of flue gas is generated during the calcination process of the internal kiln 4, and the temperature of the flue gas is also very high. Therefore, in order to further utilize the waste heat, the following settings are made.

[0053] Therefore, the smoke chamber 8 is provided. The smoke chamber 8 is used to treat the flue gas formed during the calcination of the internal kiln 4. The smoke chamber 8 is provided with a by-product gypsum calcination pipeline. The output end of the smoke chamber 8 is also provided with a flue gas purification device 14, which includes a bag dust collector 141.

[0054] The bag dust collector 141 is provided at the output end of the smoke chamber 8, which effectively filters the dust generated during the calcination process, reduces air pollution, improves the environmental protection performance of the system, and meets modern environmental protection standards.

[0055] Further, the bag dust collector 141 is provided with a dust collection box 15, which is detachably connected to the bag dust collector 141.

[0056] The detachable connection between the dust collection box 15 and the bag dust collector 141 facilitates cleaning and maintenance, prolongs the service life of the equipment, and simplifies the operation process of the equipment, thereby reducing the operation and maintenance cost.

[0057] The phosphogypsum pretreatment device 9 is provided at the output end of the smoke chamber 8. The phosphogypsum pretreatment device 9 is a drying kiln 91, which can pretreat the by-product gypsum.

[0058] Further, the drying kiln 91 is provided with multiple, and the multiple drying kiln 91 and the smoke chamber 8 are provided with a cooling device 16, so that the multiple drying kiln 91 can produce multiple types of by-product gypsum.

[0059] The setting of the cooling device 16 can effectively improve the control of the temperature, thereby effectively improving the quality control of the by-product gypsum product, and effectively improving the production efficiency.

[0060] At the same time, the drying kiln 91 is provided with a cyclone device to quickly gather the flue gas in the drying kiln 91 for use.

[0061] The cyclone device quickly gathers the flue gas for use, improves the utilization rate of hot gas and drying efficiency, reduces energy waste, and further optimizes the system thermal energy management.

[0062] Further, in order to further, the output end of the smoke chamber 8 is also provided with a heat exchanger 17.

[0063] The heat exchanger 17 can be arranged inside the smoke chamber 8 for domestic heating and product steam curing.

[0064] The implementation principle of the phosphogypsum, urban and rural sludge, organic soil and other multi-element solid waste harmless treatment and disposal system is: the harmless treatment and disposal system is set as a combination of a stirring device 1, a granulating device 2, a feeding device 3, an inner kiln 4, an outer kiln 5, a mixed calcining kiln 7, a smoke chamber 8, and a phosphogypsum pretreatment device 9, so that when the solid waste such as phosphogypsum, urban and rural sludge, and organic soil is treated, the solid waste is first fed by the feeding device 3. The crusher 31 matched with the feeding device 3 will crush the solid waste. The crushed solid waste is conveyed to the stirring device 1 under the action of the transmission belt, and the other part is conveyed to the warehouse. The stirring device 1 stirs the crushed solid waste, and the stirred solid waste is conveyed to the granulating device 2. The granulating device 2 can make the solid waste into ceramsite. The granular ceramsite is sent into the inner kiln 4 for calcination to obtain high-temperature aggregate ceramsite. A large amount of system waste heat is generated during calcination of the high-temperature aggregate ceramsite, and the high-temperature aggregate ceramsite can be delivered only after cooling to room temperature. Therefore, the high-temperature aggregate ceramsite and by-product gypsum can be sent into the mixed calcining kiln 7 to calcine the by-product gypsum by using the high-temperature aggregate ceramsite.

[0065] At the same time, a large amount of system waste heat is generated during calcination of the inner kiln 4, so that the waste heat between the inner kiln 4 and the outer kiln 5 can be extracted into the phosphogypsum pretreatment device 9 to pretreat the phosphogypsum, so that the system waste heat can be fully utilized.

[0066] At the same time, since the flue gas is formed in the calcination process of the inner kiln 4, the flue gas needs to pass through the smoke chamber 8 for dust removal and dust removal before being discharged, and the temperature of the flue gas just out of the inner kiln 4 is very high, so the whole smoke chamber 8 is a high-temperature environment, and the smoke chamber 8 has a large amount of waste heat. In order to utilize the waste heat, a by-product gypsum calcination pipeline is arranged in the smoke chamber 8, and the by-product gypsum is calcined in the smoke chamber 8, so that the calcination process is isolated from the flue gas, and the dust removal and dust removal effect of the smoke chamber 8 is not affected.

[0067] Finally, the flue gas output from the smoke chamber 8 still has a relatively high temperature, so the flue gas output from the smoke chamber 8 is introduced into the phosphogypsum pretreatment device 9, and the high-temperature flue gas pretreats the by-product gypsum in the phosphogypsum pretreatment device 9, so that different types of by-product gypsum products can be produced by adjusting the temperature.

[0068] In summary, it can be seen that the solid waste harmless treatment and disposal system of the present application has four functions. First, the heat of the high-temperature aggregate ceramsite in the calcination process can be directly utilized to calcine the by-product gypsum in the mixed calcination kiln 7. Second, the large amount of waste heat generated during the calcination of the inner kiln 4 can be utilized to pretreat the phosphogypsum in the phosphogypsum pretreatment device 9 by extracting the waste heat between the inner kiln 4 and the outer kiln 5. Third, the flue gas generated during the calcination process of the inner kiln 4 generates a large amount of waste heat, so the by-product gypsum can be calcined in the smoke chamber 8. Fourth, the flue gas output from the smoke chamber 8 still has a relatively high temperature, so the high-temperature flue gas can also be used to pretreat the by-product gypsum in the phosphogypsum pretreatment device 9. The present application reduces the pollution of industrial and agricultural solid waste to the environment to a certain extent.

[0069] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A system for the synergistic and harmless treatment and disposal of phosphogypsum, municipal sludge, organic soil and other multi-component solid waste, characterized in that, The application relates to a multi-element solid waste material preparation system. The multi-element solid waste material preparation system comprises: a stirring device (1); a granulating device (2); a feeding device (3) capable of feeding solid waste, wherein the feeding device (3) comprises a crusher (31), a bidirectional conveying belt (32) and an aging warehouse (33), one end of the bidirectional conveying belt (32) is connected with the stirring device (1), the other end is connected with the aging warehouse (33), and the solid waste is sent to the granulating device (2) for granulation after being sent to the stirring device (1) by the feeding device (3). The multi-element solid waste material preparation system comprises: an inner kiln (4) connected with the granulating device (2), which is capable of calcining the ceramic particles manufactured by the granulating device (2), the inner kiln (4) is externally sleeved with an outer kiln (5), a large amount of heat can be generated when the inner kiln (4) is calcined, and a waste heat pretreatment kiln (6) is further arranged outside the inner kiln (4), the waste heat pretreatment kiln (6) can use the hot gas between the inner kiln (4) and the outer kiln (5) to pretreat by-product gypsum.

2. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste collaborative harmless treatment and disposal system according to claim 1, characterized in that, The indirect calcination system comprises: a mixed calcination kiln (7) connected with the inner kiln (4), which is capable of calcining mixed ceramic particles and by-product gypsum; a smoke chamber (8) for treating the smoke formed when the inner kiln (4) is calcined, wherein a by-product gypsum calcination pipeline is arranged in the smoke chamber (8); a by-product gypsum pretreatment device (9) arranged at the output end of the smoke chamber (8), wherein the by-product gypsum pretreatment device (9) is a drying kiln (91) capable of pretreating by-product gypsum.

3. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 2, characterized in that, A sandwich pipeline (10) can be further arranged between the inner kiln (4) and the outer kiln (5), which is capable of pretreating by-product gypsum by using the hot gas between the inner kiln (4) and the outer kiln (5). ​ 4. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 3, characterized in that, ​ ​ ​ ​ 5. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 1, characterized in that, ​ 6. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 2, characterized in that, The outer kiln (5) is provided in multiple sections, the byproduct gypsum calcination pipe is provided in multiple sections, the multiple sections of the outer kiln (5) and the multiple sections of the byproduct gypsum calcination pipe correspond to each other, and the multiple sections of the outer kiln (5) are each provided with an air extraction device (11), the multiple sections of the outer kiln (5) are each provided with a temperature monitoring device (12) and a temperature adjusting device (13), the temperature monitoring device (12) can monitor the temperature of the outer kiln (5) and is electrically connected with the temperature adjusting device (13), and the temperature adjusting device (13) is also electrically connected with the air extraction device (11).

7. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 1, characterized in that, The output end of the smoke chamber (8) is also provided with a flue gas purification device (14), the flue gas purification device (14) comprises a bag dust removal device (141), the bag dust removal device (141) is provided with a dust collection box (15), and the dust collection box (15) is detachably connected with the bag dust removal device (141).

8. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 1, characterized in that, The drying kiln (91) is provided in multiple numbers, a cooling device (16) is arranged between the multiple drying kilns (91) and the smoke chamber (8), so that the multiple drying kilns (91) can produce multiple types of byproduct gypsum, and a cyclone device is arranged in the drying kiln (91) to quickly gather the flue gas in the drying kiln (91).

9. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 1, characterized in that, The output end of the smoke chamber (8) is also provided with a heat exchanger (17).

10. The phosphogypsum, municipal sludge, organic soil, and other multi-component solid waste synergistically harmless treatment and disposal system according to claim 1, characterized in that, The output end of the granulating device (2) is also provided with a screening device (18), and the screening device (18) can screen mixed ceramsite and byproduct gypsum of different particle sizes.

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