A system and method for realizing energy utilization of traditional Chinese medicine waste residues by using red mud solid waste

Abstract

The present invention discloses a system and method for realizing energy utilization of Chinese medicine waste residue by using red mud solid waste, the system comprises an air reactor, a gasification reactor, a red mud multifunctional carrier supplementary feeding device, an air source, a gas-solid separator I, a preheater I, a drying device, a crushing device, a mechanical dewatering device, a biomass solid waste feeding device, a gas-solid separator II, a synthesis gas treatment system, a burner, an impurity removal device, and a preheater II; the red mud multifunctional carrier particles are oxidized in the air reactor and then enter the gasification reactor, the Chinese medicine waste residue is dehydrated, crushed, and dried and then enters the gasification reactor, the Chinese medicine residue dry particles contact and react with the red mud multifunctional carrier particles in a high temperature and oxygen-deficient environment, and are gasified to produce synthesis gas under the action of water vapor. The present invention proposes for the first time a method for simultaneously treating two solid wastes, red mud and Chinese medicine waste residue, which not only fully realizes the energy utilization of Chinese medicine waste residue, but also realizes the harmless treatment of Chinese medicine waste residue.

Description

Technical Field

[0001] The present invention relates to the technical field of waste recycling, and in particular to a system and method for realizing energy utilization of traditional Chinese medicine waste residues by utilizing red mud solid waste. Background Art

[0002] At present, the utilization of TCM waste residues is focused on resource utilization, mainly including ① fermentation to make compost; ② use as a cultivation substrate; ③ use as a feed additive; ④ fermentation to produce ethanol, etc. The resource utilization of TCM waste residues cannot effectively utilize the biomass energy contained in them, resulting in serious energy waste. With the depletion of fossil energy and the further increase in human demand for energy, the energy utilization of TCM waste residues is imperative.

[0003] At present, the resource utilization of red mud is mainly concentrated in the preparation of building materials, extraction of valuable metals, environmental protection, etc. Moreover, most red mud utilization technologies are still in the laboratory stage, with high costs, and serious shortage of consumption capacity and secondary utilization.

[0004] There is no literature report on how to utilize red mud solid waste to realize energy utilization of traditional Chinese medicine waste residue. Summary of the invention

[0005] The purpose of the present invention is to provide a system for realizing energy utilization of traditional Chinese medicine waste residue by utilizing red mud solid waste, which can simultaneously process red mud solid waste and traditional Chinese medicine waste residue.

[0006] Another object of the present invention is to provide a method for utilizing red mud solid waste to realize energy utilization of traditional Chinese medicine waste residue based on the above system.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is as follows: a system for utilizing red mud solid waste to realize energy utilization of Chinese medicine waste residue, comprising an air reactor, a gasification reactor, a red mud multifunctional carrier supplementary feeding device, an air source, a gas-solid separator I, a preheater I, a drying device, a crushing device, a mechanical water removal device, a biomass solid waste feeding device, a gas-solid separator II, a synthesis gas processing system, a burner, an impurity removal device and a preheater II;

[0008] An air inlet is provided at the bottom of the air reactor, and the air inlet is connected to the air source through a three-way pipe, and is connected to the red mud multifunctional carrier supplementary feeding device through the other way. The material outlet of the air reactor is connected to the inlet of the gas-solid separator I, and the outlet of the gas-solid separator I is connected to the preheater I. The discharge port of the gas-solid separator I is connected to the material inlet of the gasification reactor. The biomass solid waste feeding device is connected to the mechanical dehydration device, the crushing device, the preheater I, and the drying device in sequence, and then connected to the material inlet of the gasification reactor. The outlet of the gasification reactor is connected to the gas-solid separator. The inlet of the gas-solid separator II is connected to the outlet of the synthesis gas treatment system, the discharge port of the gas-solid separator II is connected to the material inlet of the air reactor, the outlet of the synthesis gas treatment system is connected to the preheater II, and the outlet of the preheater II is divided into two paths, one path is connected to the gas inlet of the drying device through the burner, the gas outlet of the drying device is connected to the gas inlet of the gasification reactor, and the other path is collected as an energy product, the exhaust gas outlet of the preheater I is connected to the impurity removal device, and the exhaust gas outlets of the impurity removal device and the drying device are respectively connected to the exhaust system.

[0009] The present invention also provides a method for utilizing red mud solid waste to realize energy utilization of traditional Chinese medicine waste residue based on the above system, comprising the following steps:

[0010] 1) First, the air reactor is heated to 950° C., and the red mud multifunctional carrier particles are introduced into the air reactor from the air inlet of the air reactor by using a red mud multifunctional carrier supplementary feeding device. At the same time, air with a certain pressure and flow rate is introduced into the air reactor from the air inlet by using an air source. The red mud multifunctional carrier particles are in a fast fluidized state under high temperature and air atmosphere and are oxidized by oxygen in the air, while releasing a large amount of heat;

[0011] 2) The oxidized red mud multifunctional carrier particles enter the gas-solid separator I together with the airflow. After separation, the airflow is discharged through the outlet and then passed into the preheater I. The red mud multifunctional carrier particles enter the gasification reactor;

[0012] 3) Using a biomass solid waste feeding device, the high-water content Chinese medicine waste residue particles are passed into a mechanical dehydration device, and the waste residue moisture content is reduced to 65% by extrusion dehydration. The dehydrated waste residue is then passed into a crushing device, and crushed into Chinese medicine residue wet particles; the Chinese medicine residue wet particles enter the preheater I, and exchange heat with the high-temperature airflow from the gas-solid separator I to preheat the Chinese medicine residue wet particles, saving the heat required for further dehydration; the preheated Chinese medicine residue wet particles enter the drying device, and are dried to form Chinese medicine residue dry particles with a water content of 1%, and the drying heat source is provided by the high-temperature flue gas generated by the burner; the Chinese medicine residue dry particles and the water vapor generated in part of the drying process enter the gasification reactor together;

[0013] 4) heating the gasification reactor to 950° C., allowing the Chinese medicine residue dry particles to contact and react with the red mud multifunctional carrier particles in a high temperature and oxygen-deficient environment, and gasifying to produce synthesis gas under the action of water vapor, wherein the volume flow rate of the water vapor is 3% of the total gas flow rate in the gasification reactor;

[0014] 5) The red mud multifunctional carrier particles and gasification residue after part of the gasification reaction enter the gas-solid separator II together with the synthesis gas. After the red mud multifunctional carrier particles and gasification residue after the gasification reaction are separated from the synthesis gas, they return to the air reactor through the discharge port of the gas-solid separator II to be oxidized by air; the synthesis gas enters the synthesis gas treatment system, and obtains clean synthesis gas after ash removal, drying and purification. The clean synthesis gas enters the preheater II, and the air enters the burner after being preheated by the high-temperature clean synthesis gas. A part of the clean synthesis gas after heat exchange enters the burner 10 for combustion, and the high-temperature flue gas generated provides a heat source for the drying device. The low-temperature flue gas after heat exchange and the excess water vapor generated by the drying device are discharged after treatment, and the rest of the clean synthesis gas after heat exchange is output as an energy product.

[0015] Preferably, the mass ratio of the red mud multifunctional carrier particles to the traditional Chinese medicine residue dry particles is 4:1.

[0016] Preferably, the particle size range of the red mud multifunctional carrier particles is 106-212 μm, and the particle size range of the traditional Chinese medicine residue dry particles is 250-355 μm.

[0017] Furthermore, the method for preparing the red mud multifunctional carrier particles comprises the following steps:

[0018] 1) Take fresh red mud and sieve it to select red mud with a particle size of less than 150 μm;

[0019] 2) Slowly add the sieved red mud into water under stirring. After all the addition is completed, continue to stir at a constant speed for 6 hours to obtain a red mud suspension;

[0020] 3) the red mud suspension after stirring for 6 hours was placed in an environment of 105° C. and dried for 6 hours, and then the dried red mud was calcined at a temperature of 1250° C. and a calcination time of 6 hours;

[0021] 4) The calcined red mud is crushed and the red mud particles with a particle size of 106 to 212 μm are selected through screening as a multifunctional red mud carrier.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention proposes for the first time a method for simultaneously treating two solid wastes, namely, highly alkaline red mud and Chinese medicine waste residue with high water content and easy to corrupt and ferment. This method can not only fully realize the energy utilization of Chinese medicine waste residue, but also only leaves ash in the gasified Chinese medicine waste residue, thus realizing the harmless treatment of Chinese medicine waste residue.

[0024] 2. The present invention uses a reaction device combining a serial fluidized bed reactor and a circulating fluidized bed reactor, which can self-heat, continuously and stably carry out the treatment process. By adjusting the mass ratio of red mud multifunctional carrier particles / traditional Chinese medicine waste residue and the water vapor flow rate, it is convenient to control the gasification reaction, and the carbon-hydrogen ratio of the synthesis gas can be adjusted in a large range to produce high-quality synthesis gas with low tar and high calorific value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a system for utilizing red mud solid waste to realize energy utilization of Chinese medicine waste residues according to the present invention; the solid line represents the flow direction of solid materials, and the dotted line represents the flow direction of airflow;

[0026] Figure 2 This is a processing flow chart of red mud multifunctional carrier particles;

[0027] Figure 3 This is the XRD pattern of the treated red mud multifunctional carrier;

[0028] Figure 4 The composition and yield of syngas under different red mud-traditional Chinese medicine residue mass ratios;

[0029] Figure 5 is the composition and yield of syngas at different reaction temperatures in the gasification reactor;

[0030] In the figure, 1. air source, 2. red mud multifunctional carrier supplementary feeding device, 3. air reactor, 4. gas-solid separator I, 5. gasification reactor, 6. preheater I, 7. drying device, 8. gas-solid separator II, 9. synthesis gas processing system, 10. burner, 11. crushing device, 12. mechanical water removal device, 13. biomass solid waste feeding device, 14. impurity removal device, 15. preheater II. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown, the present invention provides a system for utilizing red mud solid waste to realize energy utilization of Chinese medicine waste residue, comprising an air reactor 3 (with a cross-sectional area of ​​19.63 square centimeters), a gasification reactor 5 (with a cross-sectional area of ​​19.63 square centimeters), a red mud multifunctional carrier supplementary feeding device 2, an air source 1, a gas-solid separator I4, a preheater I6, a drying device 7, a crushing device 11, a mechanical dewatering device 12, a biomass solid waste feeding device 13, a gas-solid separator II8, a synthesis gas processing system 9, a burner 10, a de-impurity device 14 and a preheater II 15;

[0033] An air inlet is provided at the bottom of the air reactor 3, and one of the air inlets is connected to the air source 1 through a three-way pipe, and the other is connected to the red mud multifunctional carrier supplementary feeding device 2. The material outlet of the air reactor 3 is connected to the inlet of the gas-solid separator I4, and the outlet of the gas-solid separator I4 is connected to the preheater I6. The discharge port of the gas-solid separator I4 is connected to the material inlet of the gasification reactor 5.

[0034] The biomass solid waste feeding device 13 is connected to the mechanical dehydration device 12, the crushing device 11, the preheater I6, and the drying device 7 in sequence and then connected to the material inlet of the gasification reactor 5. The outlet of the gasification reactor 5 is connected to the inlet of the gas-solid separator II8, and the outlet of the gas-solid separator II8 is connected to the inlet of the synthesis gas treatment system 9. The discharge port of the gas-solid separator II8 is connected to the material inlet of the air reactor 3, and the outlet of the synthesis gas treatment system 9 is connected to the preheater II15. The outlet of the preheater II15 is divided into two routes, one of which is connected to the gas inlet of the drying device 7 through the burner 10, and the gas outlet of the drying device 7 is connected to the gas inlet of the gasification reactor 5, and the other route is collected as an energy product. The exhaust gas outlet of the preheater I6 is connected to the impurity removal device 14, and the exhaust gas outlets of the impurity removal device 14 and the drying device 7 are respectively connected to the exhaust system.

[0035] The present invention also provides a method for utilizing red mud solid waste to realize energy utilization of traditional Chinese medicine waste residue based on the above system, comprising the following steps:

[0036] 1) First, the air reactor 3 is heated to 950° C., and the red mud multifunctional carrier supplementary feeding device 2 is used to pass the red mud multifunctional carrier particles into the air reactor 3 from the material inlet of the air reactor 3, and the air source 1 is used to pass the air at a flow rate of 0.1 meters per second under normal pressure into the air reactor 3 from the air inlet. The red mud multifunctional carrier particles are in a fast fluidized state under high temperature and air atmosphere and are oxidized by oxygen in the air, while releasing a large amount of heat;

[0037] 2) The oxidized red mud multifunctional carrier particles enter the gas-solid separator I4 together with the airflow. After separation, the airflow is discharged through the outlet and then passed into the preheater I6. The red mud multifunctional carrier particles enter the gasification reactor 5;

[0038] 3) The high-water content Chinese medicine waste residue particles are introduced into the mechanical dehydration device 12 by using the biomass solid waste feeding device 13, and the water content of the waste residue is reduced to 65% by squeezing and dehydration. The dehydrated waste residue is then introduced into the crushing device 11, and is crushed and sieved to form Chinese medicine residue wet particles with a particle size range of 250 to 355 μm; the Chinese medicine residue wet particles enter the preheater I6, and exchange heat with the high-temperature airflow from the gas-solid separator I4 to preheat the Chinese medicine residue wet particles, saving the heat required for further dehydration; the preheated Chinese medicine residue wet particles enter the drying device 7, and are dried to form Chinese medicine residue dry particles with a water content of 1%, and the drying heat source is provided by the high-temperature flue gas generated by the burner 10; the Chinese medicine residue dry particles and the water vapor generated in the partial drying process enter the gasification reactor 5 together;

[0039] 4) The gasification reactor 5 is heated to 950° C. The Chinese medicine residue dry particles are contacted and reacted with the red mud multifunctional carrier particles in a high temperature and oxygen-deficient environment, and are gasified to produce synthesis gas under the action of water vapor, wherein the volume flow rate of water vapor is 3% of the total gas flow rate in the gasification reactor 5, and the total gas flow rate is 0.17 meters per second;

[0040] 5) The red mud multifunctional carrier particles and gasification residue after part of the gasification reaction enter the gas-solid separator Ⅱ8 together with the synthesis gas. After the red mud multifunctional carrier particles and gasification residue after the gasification reaction are separated from the synthesis gas, they return to the air reactor 3 through the discharge port of the gas-solid separator Ⅱ8 to be oxidized by air; the synthesis gas enters the synthesis gas treatment system, and obtains clean synthesis gas after ash removal, drying and purification. The clean synthesis gas enters the preheater Ⅱ15, and the air enters the burner 10 after being preheated by the high-temperature clean synthesis gas. A part of the clean synthesis gas after heat exchange enters the burner 10 for combustion, and the high-temperature flue gas generated provides a heat source for the drying device 7. The low-temperature flue gas after heat exchange and the excess water vapor generated by the drying device 7 are discharged after treatment, and the rest of the clean synthesis gas after heat exchange is output as an energy product.

[0041] Among them, the treatment method of red mud multifunctional carrier, such as Figure 2 As shown, the following steps are included:

[0042] 1) Take fresh red mud and sieve it to select 800g of red mud with a particle size of less than 150μm;

[0043] 2) Add 1000 ml of deionized water into a beaker, turn on the multifunctional agitator, set the speed to 250 r / min, and slowly add the sieved red mud into the water;

[0044] 3) After 800 g of red mud is completely put into the water, a multifunctional stirrer is stirred at a speed of 250 r / min for 6 hours to obtain a red mud suspension;

[0045] 4) Pour the red mud suspension after stirring for 6 hours into a flat plate, place it in a drying oven, and dry it for 6 hours at a temperature of 105°C. Put the dried red mud into a crucible, and put the crucible into a muffle furnace to calcine the red mud. The calcination temperature is 1250°C and the calcination time is 6 hours;

[0046] 5) The calcined red mud is crushed and the red mud particles with a particle size of 106 to 212 μm are selected through screening as the required red mud multifunctional carrier particles.

[0047] Table 1 Chemical composition of red mud

[0048] Element <![CDATA[Fe2O3]]> <![CDATA[Al2O3]]> <![CDATA[SiO2]]> <![CDATA[Na2O]]> <![CDATA[TiO2]]> CaO S Zr content 38.18 23.33 14.8 13 7.204 2.42 0.308 0.181

[0049] As a multifunctional carrier, red mud solid waste has multiple functions such as transferring lattice oxygen, transferring heat, and catalysis. As shown in Table 1, the main components of red mud solid waste before treatment are Fe2O3, Al2O3, SiO2, alkali metals, etc. Among them, iron, as a transition metal element, has a natural catalytic effect, and the presence of alkali metals is also conducive to the gasification process of biomass. Therefore, the use of this method to treat traditional Chinese medicine waste residue has the advantages of fast gasification speed, high quality of synthetic gas, and low tar content.

[0050] like Figure 3 As shown, the sodium element in the red mud solid waste after the gasification reaction exists stably in the form of NaAlSiO4, and there is no problem of sodium element loss, which solves the problem that the red mud is difficult to effectively treat due to its strong alkalinity caused by high sodium.

[0051] Different mass ratios of red mud multifunctional carrier particles / traditional Chinese medicine residue dry particles have a certain influence on the composition and yield of syngas. Figure 4 As shown, under the condition that the temperature of the gasification reactor 5 is 950°C, when the mass ratio of red mud multifunctional carrier particles to Chinese medicinal residue dry particles is 3:1, the components of the generated synthesis gas are 20.22% hydrogen, 73.43% carbon monoxide, and 6.35% methane, and 1 gram of Chinese medicinal residue dry particles can produce 0.8214 liters of synthesis gas; when the mass ratio of red mud multifunctional carrier particles to Chinese medicinal residue dry particles is 4:1, the components of the generated synthesis gas are 31.33% hydrogen, 57.16% carbon monoxide, and 11.51% methane, and 1 gram of Chinese medicinal residue dry particles can produce 0.5758 liters of synthesis gas; when the mass ratio of red mud multifunctional carrier particles to Chinese medicinal residue dry particles is 5:1, the components of the generated synthesis gas are 16.71% hydrogen, 78.41% carbon monoxide, and 4.88% methane, and 1 gram of Chinese medicinal residue dry particles can produce 0.6525 liters of synthesis gas. From the perspective of optimizing synthesis gas quality and maximizing economic value, the preferred mass ratio of red mud multifunctional carrier particles to traditional Chinese medicine waste residue is 4:1.

[0052] The operating temperature of the gasification reactor also has a certain influence on the composition and output of the syngas. Figure 5 As shown in the figure, under the condition of red mud multifunctional carrier particles / TCM slag dry particles mass ratio of 4:1, when the temperature of the gasification reactor is 750℃, the composition of the generated syngas is 23.74% hydrogen, 59.18% carbon monoxide, 5.74% methane, and 1g of TCM slag dry particles can produce 0.2411 liters of syngas; when the temperature of the gasification reactor is 850℃, the composition of the generated syngas is 17.78% hydrogen, 74.16% carbon monoxide, 2.68% methane, and 1g of TCM slag dry particles can produce 0.5376 liters of syngas; when the temperature of the gasification reactor is 950℃, the composition of the generated syngas is 31.33% hydrogen, 57.16% carbon monoxide, 11.51% methane, and 1g of TCM slag dry particles can produce 0.5758 liters of syngas. Considering the quality of syngas and the heat transfer process inside the reaction system, the preferred temperature of the gasification reactor is 950℃.

[0053] Theoretical calculation results show that when the following parameters are selected: red mud multifunctional carrier particles / TCM waste residue mass ratio = 4:1, air reactor operating temperature 950℃, gasification reactor operating temperature 950℃, each gram of dry TCM residue particles produces 0.5758 liters of synthesis gas, which contains 57.16% carbon monoxide, 31.33% hydrogen, 11.51% methane, and low calorific value of 12.64MJ / m 3 , 12.74MJ / m 3 , 35.88MJ / m 3 According to the industrial drying process, evaporating 1 ton of water consumes 4180MJ of heat, and the moisture content of wet Chinese medicine residue particles is 65%. Every 2.857 tons of Chinese medicine waste residue contains 1.857 tons of water, produces 1 ton of dry Chinese medicine residue particles, and generates 575.8m of synthesis gas. 3 , a total of 8836.373MJ of heat is generated, and the heat required for drying is 7762.86MJ. Based on this, the reactor can maintain self-heating operation without the need for an external heat source. 87.85% of the generated synthesis gas will enter the burner for combustion, and the remaining 12.15% of the synthesis gas will be output as a synthesis gas product.

Claims

1. A method for utilizing red mud solid waste to realize energy utilization of traditional Chinese medicine waste residue, characterized in that: The following steps are involved: 1) firstly, the air reactor (3) is heated to 950° C., and the red mud multifunctional carrier particles are introduced into the air reactor (3) from the air inlet of the air reactor (3) by using the red mud multifunctional carrier supplementary feeding device (2). At the same time, air with a certain pressure and flow rate is introduced into the air reactor (3) from the air inlet by using the air source (1). The red mud multifunctional carrier particles are in a fast fluidized state under the high temperature and air atmosphere and are oxidized by oxygen in the air, while releasing a large amount of heat; 2) The oxidized red mud multifunctional carrier particles enter the gas-solid separator I (4) together with the airflow. After separation, the airflow is discharged through the outlet and then passed into the preheater I (6). The red mud multifunctional carrier particles enter the gasification reactor (5); 3) using a biomass solid waste feeding device (13) to pass the high-water content Chinese medicine waste residue particles into a mechanical dewatering device (12), and the waste residue moisture content is reduced to 65% by extrusion dewatering, and the dewatered waste residue is then passed into a crushing device (11) and crushed to produce Chinese medicine residue wet particles; The wet Chinese medicine residue particles enter the preheater I (6) and exchange heat with the high-temperature airflow from the gas-solid separator I (4) to preheat the wet Chinese medicine residue particles, saving the heat required for further dehydration; the preheated wet Chinese medicine residue particles enter the drying device (7) and are dried to form dry Chinese medicine residue particles containing 1% water. The drying heat source is provided by the high-temperature flue gas generated by the burner (10); The dried Chinese medicine residue particles and the water vapor generated in the partial drying process enter the gasification reactor (5) together; 4) heating the gasification reactor (5) to 950° C., allowing the Chinese medicine residue dry particles to contact and react with the red mud multifunctional carrier particles in a high temperature and oxygen-deficient environment, and gasifying to produce synthesis gas under the action of water vapor, wherein the volume flow rate of the water vapor is 3% of the total gas flow rate in the gasification reactor (5); 5) The red mud multifunctional carrier particles and gasification residue after part of the gasification reaction enter the gas-solid separator II (8) together with the synthesis gas. After the red mud multifunctional carrier particles and gasification residue after the gasification reaction are separated from the synthesis gas, they return to the air reactor (3) through the discharge port of the gas-solid separator II (8) to be oxidized by air; the synthesis gas enters the synthesis gas treatment system, and is obtained by ash removal, drying and purification to obtain clean synthesis gas. The clean synthesis gas enters the preheater II (15), and the air is preheated by the high-temperature clean synthesis gas and enters the burner (10). A part of the clean synthesis gas after heat exchange enters the burner (10) for combustion, and the high-temperature flue gas generated provides a heat source for the drying device (7). The low-temperature flue gas after heat exchange and the excess water vapor generated by the drying device (7) are discharged after treatment, and the rest of the clean synthesis gas after heat exchange is output as an energy product; The mass ratio of the red mud multifunctional carrier particles to the Chinese medicine residue dry particles is 4:1; The particle size range of the red mud multifunctional carrier particles is 106-212 μm, and the particle size range of the traditional Chinese medicine residue dry particles is 250-355 μm; The method for preparing the red mud multifunctional carrier particles comprises the following steps: 1) Take fresh red mud and sieve it to select red mud with a particle size of less than 150 μm; 2) Slowly add the sieved red mud into water under stirring. After all the addition is completed, continue to stir at a constant speed for 6 hours to obtain a red mud suspension; 3) the red mud suspension after stirring for 6 hours was placed in an environment of 105° C. and dried for 6 hours, and then the dried red mud was calcined at a temperature of 1250° C. and a calcination time of 6 hours; 4) Crushing the calcined red mud, screening and selecting red mud particles with a particle size of 106-212 μm as a multifunctional red mud carrier A system for utilizing red mud solid waste to realize energy utilization of Chinese medicine waste residues, comprising an air reactor (3), a gasification reactor (5), a red mud multifunctional carrier supplementary feeding device (2), an air source (1), a gas-solid separator I (4), a preheater I (6), a drying device (7), a crushing device (11), a mechanical dewatering device (12), a biomass solid waste feeding device (13), a gas-solid separator II (8), a synthesis gas processing system (9), a burner (10), an impurity removal device (14) and a preheater II (15); An air inlet is provided at the bottom of the air reactor (3), and the air inlet is connected to the air source (1) through a three-way pipe in one way and connected to the red mud multifunctional carrier supplementary feeding device (2) in the other way. The material outlet of the air reactor (3) is connected to the inlet of the gas-solid separator I (4), and the outlet of the gas-solid separator I (4) is connected to the preheater I (6). The discharge port of the gas-solid separator I (4) is connected to the material inlet of the gasification reactor (5). The biomass solid waste feeding device (13) is connected to the mechanical dewatering device (12), the crushing device (11), the preheater I (6), and the drying device (7) in sequence and then connected to the material inlet of the gasification reactor (5). The outlet of the gasification reactor (5) is connected to the gas-solid separator I (4). The inlet of the gas-solid separator II (8) is connected to the inlet of the synthesis gas treatment system (9), the discharge port of the gas-solid separator II (8) is connected to the material inlet of the air reactor (3), the outlet of the synthesis gas treatment system (9) is connected to the preheater II (15), the outlet of the preheater II (15) is divided into two paths, one path is connected to the gas inlet of the drying device (7) through the burner (10), the gas outlet of the drying device (7) is connected to the gas inlet of the gasification reactor (5), and the other path is collected as an energy product, the exhaust gas outlet of the preheater I (6) is connected to the impurity removal device (14), and the exhaust gas outlets of the impurity removal device (14) and the drying device (7) are respectively connected to the exhaust system.

Images