Cement kiln waste heat power generation system integrated with biomass gasification

Abstract

The present disclosure provides a cement kiln waste heat power generation system integrated with biomass gasification. The system comprises: a biomass gasification electricity unit for gasifying biomass raw materials to generate syngas for power generation; a cement kiln waste heat power generation unit for generating power by using the waste heat of flue gas discharged from a cement kiln; and an organic power generation unit for generating power by using the exhaust gas of a gas turbine. The system combines biomass gasification with cement kiln waste heat utilization, and uses the high-temperature flue gas generated by biomass gasification and the waste heat of flue gas discharged from the cement kiln for multi-stage heat energy recovery and power generation, thereby improving power generation efficiency, fully utilizing waste heat resources, and reducing carbon emissions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of biomass direct combustion power generation, and particularly relates to a cement kiln waste heat power generation system integrated with biomass gasification. BACKGROUND

[0002] In a cement production enterprise, it is quite difficult to improve the energy saving and consumption reduction of the cement production process itself or to improve the thermal efficiency of the kiln head cooler and the kiln tail preheater system, and a high cost needs to be paid, so the energy saving and consumption reduction of the cement industry can only focus on waste heat utilization, and the main means of waste heat utilization is to generate power by using cement kiln waste heat.

[0003] At the same time, in the process of development and utilization of biomass energy, the environmental pollutant emissions are significantly reduced compared with coal combustion. Therefore, biomass energy has become one of the main energies in the 21st century. Biomass gasification-gas turbine combined cycle power generation technology is an advanced biomass gasification power generation technology, and the overall efficiency is higher than 40%.

[0004] In addition, the organic Rankine cycle has the advantages of low evaporation pressure and condensation pressure, high cycle thermal efficiency and relatively simple equipment, and is an effective low-grade waste heat power generation technology. The related research work carried out around this technology has important significance for improving the energy utilization rate of China and improving the current situation of lack of low-temperature waste heat resource utilization technology in China.

[0005] Therefore, based on the above problems, the present application provides a system combining cement production waste heat utilization, biomass power generation and organic Rankine cycle to improve power generation efficiency, fully utilize waste heat resources and reduce carbon emissions. SUMMARY

[0006] Embodiments of the present disclosure aim to at least solve one of the technical problems existing in the prior art, and provide a cement kiln waste heat power generation system integrated with biomass gasification. The system combines biomass gasification with cement kiln waste heat utilization, utilizes high-temperature flue gas generated by biomass gasification and flue gas waste heat discharged by a cement kiln for multi-stage heat energy recovery and power generation, and achieves the effects of improving power generation efficiency, fully utilizing waste heat resources and reducing carbon emissions.

[0007] In a first aspect, the present disclosure provides a cement kiln waste heat power generation system integrated with biomass gasification, characterized in that the system comprises:

[0008] a biomass gasification power generation unit for gasifying biomass raw materials to generate synthesis gas for power generation;

[0009] a cement kiln waste heat power generation unit for generating power by utilizing flue gas waste heat discharged by a cement kiln;

[0010] An organic power generation unit for generating power by using waste gas of a gas turbine.

[0011] Further, the organic power generation unit comprises a gasifier, a flue gas treatment device, a compressor, a gas turbine and a first power generator.

[0012] The gasifier, the flue gas treatment device, the compressor, the gas turbine and the first power generator are connected in series.

[0013] Further, the biomass is gasified in the gasifier, the generated synthesis gas is cleaned in the flue gas treatment device, and the pressurized synthesis gas is sent to the gas turbine for combustion, and the high-temperature gas drives the first power generator to generate power.

[0014] Further, the cement kiln waste heat power generation unit comprises a cement rotary kiln, a kiln tail boiler heat exchanger, a superheater, a kiln head boiler high-temperature heat exchanger, a kiln head boiler low-temperature heat exchanger, a first steam turbine, a first condenser, a third power generator and a circulating pump.

[0015] The flue gas outlet of the gas turbine is connected to the flue gas inlet of the superheater.

[0016] Further, the kiln tail outlet of the cement rotary kiln is connected to the flue gas inlet of the kiln tail boiler heat exchanger, and the steam outlet of the kiln tail boiler heat exchanger is connected to the steam inlet of the superheater.

[0017] The kiln head outlet of the cement rotary kiln is connected to the flue gas inlet of the kiln head boiler high-temperature heat exchanger, and the flue gas outlet of the kiln head boiler high-temperature heat exchanger is connected to the flue gas inlet of the kiln head boiler low-temperature heat exchanger.

[0018] The steam outlet of the kiln head boiler high-temperature heat exchanger is connected to the steam inlet of the superheater, and the steam outlet of the kiln head boiler low-temperature heat exchanger is connected to the first inlet of the first steam turbine.

[0019] Further, the first outlet of the circulating pump is connected to the steam inlet of the kiln tail boiler heat exchanger, the second outlet of the circulating pump is connected to the steam inlet of the kiln head boiler high-temperature heat exchanger, and the third outlet of the circulating pump is connected to the steam inlet of the kiln head boiler low-temperature heat exchanger.

[0020] Further, the steam outlet of the superheater is connected to the second inlet of the first steam turbine, the steam outlet of the first steam turbine is connected to the inlet of the first condenser, and the outlet of the first condenser is connected to the inlet of the circulating pump.

[0021] The first steam turbine drives the third power generator to generate power by using steam.

[0022] Further, the organic power generation unit comprises an organic working fluid superheater, a second steam turbine, a second power generator, a second condenser and a working fluid pump.

[0023] Further, the superheater flue gas outlet is connected to the organic working medium superheater flue gas inlet, the organic working medium superheater steam outlet is connected to the second steam turbine steam inlet, the second steam turbine steam outlet is connected to the second condenser inlet, the second condenser outlet is connected to the working medium pump, and the working medium pump outlet is connected to the organic working medium superheater steam inlet.

[0024] Further, the organic working medium is pumped into the organic working medium superheater by the working medium pump and evaporated by the flue gas therein to generate organic steam for entering the second steam turbine to generate power. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural schematic diagram of a cement kiln waste heat power generation system integrated with biomass gasification according to an embodiment of the present disclosure;

[0026] Figure 2 A specific structural schematic diagram of a cement kiln waste heat power generation system integrated with biomass gasification according to an embodiment of the present disclosure;

[0027] In the drawings: 1-cement rotary kiln; 2-gasifier; 3-flue gas treatment equipment; 4-compressor; 5-gas turbine; 6-first generator; 7-kiln tail boiler heat exchanger; 8-superheater; 9-kiln head boiler high-temperature heat exchanger; 10-kiln head boiler low-temperature heat exchanger; 11-first steam turbine; 12-first condenser; 13-second condenser; 14-working medium pump; 15-second steam turbine; 16-organic working medium superheater; 17-second generator; 18-third generator; 19-circulating pump. DETAILED DESCRIPTION

[0028] The exemplary embodiments will be described in detail herein below with reference to the drawings. In the following description, the same drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present disclosure.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0030] It should be understood that, although the terms first, second, third, etc. can be employed in describing various information in the disclosure embodiments, such information should not be limited to these terms. These terms are only used to differentiate one piece of information from another piece of information of the same type. For example, without departing from the scope of the disclosure embodiments, first information can also be referred to as second information, and similarly, second information can also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon" or "in response to determining".

[0031] As Figure 1 shown, a structure schematic diagram of a cement kiln waste heat power generation system integrated with biomass gasification according to an embodiment of the disclosure. The system 100 comprises:

[0032] a biomass gasification power generation unit 110, configured to gasify biomass raw materials to generate syngas for power generation;

[0033] a cement kiln waste heat power generation unit 120, configured to utilize the waste heat of flue gas discharged by a cement kiln to generate power;

[0034] an organic power generation unit 130, configured to utilize the exhaust gas of a gas turbine to generate power.

[0035] The system will be described in detail below. Figure 2 The system will be described in detail below.

[0036] As Figure 2 shown, a structure schematic diagram of a cement kiln waste heat power generation system integrated with biomass gasification according to an embodiment of the disclosure.

[0037] The biomass gasification power generation unit 110 comprises a gasifier 2, a flue gas treatment device 3, a gas compressor 4, a gas turbine 5 and a first generator 6; the gasifier 2, the flue gas treatment device 3, the gas compressor 4, the gas turbine 5 and the first generator 6 are connected in series.

[0038] Specifically, the biomass raw materials are pyrolyzed and partially oxidized in the gasifier 2 to generate syngas. The syngas is subjected to desulfurization, dust removal and removal of other pollutants in the flue gas treatment device 3. The cleaned syngas is compressed in the gas compressor 4 to increase its pressure and enhance its combustion performance. The high-pressure syngas then enters the combustion chamber of the gas turbine 5, and the ignition device in the combustion chamber ignites the syngas to make it burn violently. The high-temperature and high-pressure gas produced by the combustion passes through the turbine of the gas turbine 5, and the turbine blades rotate under the action of the high-temperature and high-pressure gas, converting heat energy and pressure energy into mechanical energy to drive the main shaft of the gas turbine to rotate. The main shaft is connected to the first generator 6 through a shaft coupling to convert mechanical energy into electrical energy.

[0039] The system realizes efficient conversion of biomass energy to electricity through gasification, biomass cleaning, compression and efficient combustion, fully utilizes biomass resources, reduces dependence on fossil fuels, and effectively controls pollutant emissions through flue gas treatment equipment, with environmental benefits.

[0040] The biomass raw material is gasified in the gasifier 2, and the generated synthesis gas enters the flue gas treatment equipment 3 for cleaning, and is pressurized by the compressor 4 and sent to the gas turbine 5 for combustion to generate high-temperature gas to drive the first generator 6 to generate electricity.

[0041] Specifically, the biomass raw material is gasified in the gasifier 2 through high-temperature pyrolysis and partial oxidation reaction to generate synthesis gas, mainly composed of carbon monoxide, hydrogen and methane. The generated synthesis gas enters the flue gas treatment equipment 3 for desulfurization, dust removal and coke removal, etc. to remove impurities and harmful components. The treated synthesis gas is pressurized by the compressor 4 to increase its density and combustion efficiency. The high-pressure synthesis gas enters the combustion chamber of the gas turbine 5, and the ignition device ignites the high-pressure synthesis gas. The high-temperature and high-pressure gas produced by combustion drives the turbine blades of the gas turbine to rotate. The turbine converts heat energy and pressure energy into mechanical energy to drive the main shaft of the gas turbine to rotate. The rotating main shaft is connected to the first generator 6 through a shaft coupling to convert mechanical energy into electrical energy.

[0042] The utilization efficiency of biomass energy is improved, and the emission of pollutants is significantly reduced. Through the clean and efficient combustion process, the overall system is environmentally friendly and economically beneficial.

[0043] The cement kiln waste heat power generation unit 120 includes a cement rotary kiln 1, a kiln tail boiler heat exchanger 7, a superheater 8, a kiln head boiler high-temperature heat exchanger 9, a kiln head boiler low-temperature heat exchanger 10, a first steam turbine 11, a first condenser 12, a third generator 18 and a circulating pump 19; the flue gas outlet of the gas turbine 5 is connected to the flue gas inlet of the superheater 8.

[0044] Specifically, the high-temperature waste gas generated in the production process of the cement rotary kiln 1 is introduced into the kiln tail boiler heat exchanger 7, and the heat in the waste gas is used to heat water into steam. The generated steam enters the superheater 8 to further increase the temperature and pressure, so that the steam reaches a higher thermodynamic energy state. The kiln head boiler high-temperature heat exchanger 9 and the kiln head boiler low-temperature heat exchanger 10 also use high-temperature waste gas from different positions of the cement kiln for heat exchange, respectively, to produce steam of different temperatures and pressures. The high-temperature and high-pressure steam enters the first steam turbine 11, driving the turbine blades to rotate and converting heat energy into mechanical energy to drive the third generator 18 to generate electricity. The flue gas discharged from the gas turbine 5 enters the superheater 8 to further increase the steam temperature, improving the overall thermal efficiency of the system.

[0045] The waste heat resources in the cement production process are efficiently converted into electric energy, realizing the reuse of waste heat, reducing energy waste, and significantly improving the power generation efficiency, reducing operation cost and environmental pollution through multi-stage heat exchange and waste heat utilization.

[0046] The outlet of the cement rotary kiln 1 is connected to the inlet of the kiln tail boiler heat exchanger 7, and the steam outlet of the kiln tail boiler heat exchanger 7 is connected to the steam inlet of the superheater 8; the outlet of the cement rotary kiln 1 is connected to the inlet of the kiln head boiler high-temperature heat exchanger 9, and the flue gas outlet of the kiln head boiler high-temperature heat exchanger 9 is connected to the flue gas inlet of the kiln head boiler low-temperature heat exchanger 10; the steam outlet of the kiln head boiler high-temperature heat exchanger 9 is connected to the steam inlet of the superheater 8, and the steam outlet of the kiln head boiler low-temperature heat exchanger 10 is connected to the first inlet of the first steam turbine 11.

[0047] Specifically, the high-temperature flue gas is discharged from the kiln tail and the kiln head of the cement rotary kiln 1, respectively, which first enters the kiln tail boiler heat exchanger 7, and the heat is transferred to the boiler water to generate steam. The steam enters the superheater 8 through the pipeline, and is further heated to a higher temperature and pressure. The high-temperature flue gas discharged from the kiln head enters the kiln head boiler high-temperature heat exchanger 9, and transfers its heat to the steam to generate high-temperature and high-pressure steam. Subsequently, the exhaust gas enters the kiln head boiler low-temperature heat exchanger 10 to further utilize the waste heat. The steam from the outlets of the kiln head boiler high-temperature heat exchanger 9 and the low-temperature heat exchanger 10 enters the superheater 8 and the first steam turbine 11, respectively, and finally drives the blades to rotate in the steam turbine, driving the generator to generate electricity.

[0048] By utilizing the heat of high-temperature flue gas in stages, the heat energy recovery efficiency of the system is effectively improved, so that each stage of heat exchanger can fully utilize the heat of flue gas, reducing the overall energy consumption of the system, improving the power generation efficiency, and reducing the exhaust gas emission.

[0049] The first outlet of the circulating pump 19 is connected to the steam inlet of the kiln tail boiler heat exchanger 7, the second outlet of the circulating pump 19 is connected to the steam inlet of the kiln head boiler high-temperature heat exchanger 9, and the third outlet of the circulating pump 19 is connected to the steam inlet of the kiln head boiler low-temperature heat exchanger 10.

[0050] Specifically, the circulating pump 19 divides the condensed water into three streams, which are respectively sent to the steam inlets of the kiln tail boiler heat exchanger 7, the kiln head boiler high-temperature heat exchanger 9 and the kiln head boiler low-temperature heat exchanger 10.

[0051] By distributing the condensed water to different heat exchangers, it is ensured that each heat exchanger can continuously obtain sufficient water for heating and steam production, thereby improving the overall operation efficiency and stability of the system.

[0052] The steam outlet of the superheater 8 is connected to the second inlet of the first steam turbine 11, the steam outlet of the first steam turbine 11 is connected to the inlet of the first condenser 12, and the outlet of the first condenser 12 is connected to the inlet of the circulating pump 19; the first steam turbine 11 utilizes steam to drive the third generator 18 to generate electricity.

[0053] Specifically, the superheater 8 sends high-temperature and high-pressure steam into the second inlet of the first steam turbine 11. The steam pushes the turbine blades to rotate, converting thermal energy into mechanical energy, thereby driving the third generator 18 to generate electricity. The used steam is discharged from the first steam turbine 11 and enters the first condenser 12, where it is converted into water through condensation. The condensed water is pumped back into the system by the circulating pump 19, reheated, and then enters each heat exchanger for a new cycle.

[0054] By recycling steam and condensate, water resource waste is reduced, while ensuring efficient operation of the steam turbine. The system effectively converts thermal energy into electrical energy, improving overall power generation efficiency, while achieving sustainable resource utilization.

[0055] The organic power generation unit 130 includes an organic working fluid superheater 16, a second steam turbine 15, a second generator 17, a second condenser 13, and a working fluid pump 14.

[0056] The flue gas outlet of the superheater 8 is connected to the flue gas inlet of the organic working fluid superheater 16. The steam outlet of the organic working fluid superheater 16 is connected to the steam inlet of the second steam turbine 15. The steam outlet of the second steam turbine 15 is connected to the inlet of the second condenser 13. The outlet of the second condenser 13 is connected to the working fluid pump 14. The outlet of the working fluid pump 14 is connected to the steam inlet of the organic working fluid superheater 16.

[0057] The organic working fluid is sent into the organic working fluid superheater 16 by the working fluid pump 14 and evaporated by the flue gas inside, producing organic steam that is sent into the second steam turbine 15 for power generation.

[0058] Specifically, the working fluid pump 14 sends organic working fluid (including low-boiling organic liquid) from the outlet of the organic working fluid superheater 16.

[0059] The organic working fluid enters the organic working fluid superheater 16 after increasing the pressure by the working fluid pump 14.

[0060] Inside the organic working fluid superheater 16, flue gas is discharged from the furnace and heats the organic working fluid through the heat exchanger, causing it to evaporate into organic steam.

[0061] The temperature and pressure of the steam are both higher than the saturation point, providing sufficient energy.

[0062] The generated organic steam is sent into the second steam turbine 15. Inside the second steam turbine 15, the thermal energy of the organic steam is converted into mechanical energy, pushing the turbine to rotate. The second steam turbine 15 is connected to the second generator 17, and the rotation of the turbine drives the generator to generate electricity. The generator converts mechanical energy into electrical energy, producing power output.

[0063] The discharged organic vapor enters the second condenser 13, where the vapor is cooled and condensed into liquid by a cooling medium (such as cooling water). The condensed organic working fluid is sent back to the organic working fluid superheater 16 by the working fluid pump 14, forming a closed cycle.

[0064] Using an organic working fluid cycle can utilize low-grade heat sources (such as waste heat, waste heat) to generate electricity, thereby improving overall energy utilization efficiency. By improving the utilization efficiency of thermal energy, the dependence on traditional energy sources can be reduced, and carbon emissions can be reduced. Systems using organic working fluids tend to reduce environmental impact and are suitable for application scenarios with high environmental protection requirements.

[0065] It should be noted that the selectivity of the organic working fluid is extensive, and appropriate working fluids can be selected according to the specific heat source temperature range to achieve optimal performance, which is not specifically limited in this embodiment.

[0066] This system can effectively recover and utilize otherwise wasted heat energy, improving the economy of energy. Compared to traditional steam cycle power generation systems, the equipment and operating costs of organic working fluid systems can be lower, especially in low-temperature waste heat recovery.

[0067] Embodiments of the present disclosure provide a cement kiln waste heat power generation system integrated with biomass gasification, which utilizes the high-temperature flue gas generated by biomass gasification and the flue gas waste heat discharged by the cement kiln for multi-stage heat recovery and power generation, achieving the effects of improving power generation efficiency, fully utilizing waste heat resources, and reducing carbon emissions.

[0068] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present disclosure. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0069] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0070] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0071] In the embodiments provided by the present disclosure, it should be understood that the disclosed apparatus / equipment and method can be implemented in other ways. For example, the apparatus / equipment embodiments described above are merely schematic, for example, the division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0072] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0073] In addition, each functional unit in each embodiment of the present disclosure can be integrated into one processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0074] The integrated modules / units, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by instructing related hardware through a computer program, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. The computer program can include computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electric carrier signal and telecommunication signal.

[0075] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure.

Claims

1. A system for integrated biomass gasification with cement kiln waste heat power generation, characterized in that, The system comprises: a biomass gasification power unit for gasifying biomass raw material to generate syngas for power generation; a cement kiln waste heat power generation unit for generating power by using the waste heat of the flue gas discharged by a cement kiln, the cement kiln waste heat power generation unit comprising a cement rotary kiln, a kiln tail boiler heat exchanger, a superheater, a kiln head boiler high-temperature heat exchanger, a kiln head boiler low-temperature heat exchanger, a first steam turbine, a first condenser, a third generator and a circulating pump, the kiln tail outlet of the cement rotary kiln is connected to the flue gas inlet of the kiln tail boiler heat exchanger, the steam outlet of the kiln tail boiler heat exchanger is connected to the steam inlet of the superheater, the kiln head outlet of the cement rotary kiln is connected to the flue gas inlet of the kiln head boiler high-temperature heat exchanger, the flue gas outlet of the kiln head boiler high-temperature heat exchanger is connected to the flue gas inlet of the kiln head boiler low-temperature heat exchanger, the steam outlet of the kiln head boiler high-temperature heat exchanger is connected to the steam inlet of the superheater, and the steam outlet of the kiln head boiler low-temperature heat exchanger is connected to the first inlet of the first steam turbine; an organic power generation unit for generating power by using the exhaust gas of a gas turbine.

2. The system of claim 1, wherein, The biomass gasification power unit comprises a gasifier, a flue gas treatment device, a compressor, a gas turbine and a first generator; the gasifier, the flue gas treatment device, the compressor, the gas turbine and the first generator are connected in series, and the flue gas outlet of the gas turbine is connected to the flue gas inlet of the superheater.

3. The system of claim 2, wherein, The biomass raw material is gasified in the gasifier, the generated syngas is cleaned in the flue gas treatment device, and the pressurized syngas is sent into the gas turbine for combustion, and the high-temperature gas drives the first generator to generate power.

4. The system of claim 1, wherein, The first outlet of the circulating pump is connected to the steam inlet of the kiln tail boiler heat exchanger, the second outlet of the circulating pump is connected to the steam inlet of the kiln head boiler high-temperature heat exchanger, and the third outlet of the circulating pump is connected to the steam inlet of the kiln head boiler low-temperature heat exchanger.

5. The system of claim 1, wherein, The steam outlet of the superheater is connected to the second inlet of the first steam turbine, the steam outlet of the first steam turbine is connected to the inlet of the first condenser, and the outlet of the first condenser is connected to the inlet of the circulating pump. The first steam turbine drives the third generator to generate power by using steam.

6. The system of claim 1, wherein, The organic power generation unit comprises an organic working medium superheater, a second steam turbine, a second generator, a second condenser and a working medium pump.

7. The system of claim 6, wherein, The flue gas outlet of the superheater is connected to the flue gas inlet of the organic working medium superheater, the steam outlet of the organic working medium superheater is connected to the steam inlet of the second steam turbine, the steam outlet of the second steam turbine is connected to the inlet of the second condenser, the outlet of the second condenser is connected to the working medium pump, and the outlet of the working medium pump is connected to the steam inlet of the organic working medium superheater.

8. The system of claim 7, wherein, The organic working medium is sent into the organic working medium superheater by the working medium pump, heated and evaporated by the flue gas in the organic working medium superheater, and organic steam is generated and sent into the second steam turbine for power generation.

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