Four-stage temperature control kiln type garbage particle drying incineration coupling power generation system and use method thereof

Abstract

The invention relates to a four-stage temperature control kiln type garbage particle drying incineration coupling power generation system and a using method thereof.The four-stage temperature control kiln type garbage particle drying incineration coupling power generation system is composed of a power generation system, a kiln type drying incineration system and a garbage mixing granulation treatment system, the garbage mixing granulation treatment system is connected with a garbage storage area, treated garbage is connected with the kiln type drying incineration system, and the kiln type drying incineration system is connected with the power generation system; the control system, the power generation system, the kiln type drying incineration system and the garbage mixing granulation treatment system are all located in an integral plant. The kiln replaces a furnace to dry and incinerate the garbage sludge, coal is not needed, the engineering cost and the comprehensive operation cost are greatly reduced, a four-stage temperature control technology is adopted for drying incineration, garbage sludge particles are dried and incinerated harmlessly, the garbage sludge mixing, granulating and drying incineration process is adopted, flying dust and floating objects are avoided, a drying incineration workshop adopts a micro-negative-pressure heat insulation design, and the environment is protected. The calorific value of the garbage sludge is utilized to the maximum extent, oxygen-containing air needed by incineration of garbage sludge particles is introduced into a garbage sludge granulation workshop, and the situation that peculiar smell gas of the garbage sludge overflows and influences the surrounding environment is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid waste treatment, and relates to a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system and a use method thereof. Background Art

[0002] At present, the main method of garbage disposal is waste-to-energy, and the main method of sludge disposal is drying and incineration. Since waste-to-energy plants are transformed from traditional small and medium-sized coal-fired power plants, there are inherent deficiencies in using them for waste-to-energy. This is manifested in: 1. High cost.

[0003] 2. The degree of resource utilization is very low.

[0004] 3. There are functional defects in the decomposition of harmful gases.

[0005] Therefore, waste-to-energy equipment must have new breakthroughs in cost, resource utilization and harmless treatment technology. There must be a new waste-to-energy equipment to replace existing waste-to-energy plants.

[0006] To this end, a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system and its use method are designed. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system and its use method which has a simple and reasonable structure, low investment cost and operating cost, high degree of resource utilization, harmless exhaust gas emission, and environmental protection and high efficiency.

[0008] The present invention is realized through the following technical scheme: a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system, which consists of a power generation system, a kiln-type drying and incineration system, and a garbage mixed granulation processing system. The garbage mixed granulation processing system is connected to an external garbage storage area to pre-treat the garbage. The treated garbage is connected to the kiln-type drying and incineration system, and the heat energy generated after incineration is connected to the power generation system for power generation. The power generation system, the kiln-type drying and incineration system, and the garbage mixed granulation processing system are all controlled by a control system. The control system, the power generation system, the kiln-type drying and incineration system, and the garbage mixed granulation processing system are all located in an integrated factory building, wherein the power generation system is located in a power generation workshop, the kiln-type drying and incineration system is located in a drying and incineration workshop, the garbage mixed granulation processing system is located in a garbage sludge mixed granulation workshop, and the control system is located in a control room on the second floor of the factory building, and a rest room is also provided on one side of the control room.

[0009] Preferably: the garbage mixing granulation processing system is composed of a sorting mechanism, a mixing mechanism, a first granulator, and a second granulator, wherein the sorting mechanism is composed of a sludge pool, a sorting machine, a shredder, and a garbage shredder bin, wherein the sludge pool and the sorting machine are respectively connected to an external garbage storage area, and the liquid garbage in the garbage storage area flows into the sludge pool through a pipeline, and the solid garbage is sorted by the sorting machine, and the sorted combustible garbage enters the shredder for shredding and is then sent to the garbage shredder, and the non-combustible garbage is put into the non-combustible garbage storage area for sending out for treatment, and the garbage shredder and the sludge pool are connected to the mixing mechanism.

[0010] Preferably, the mixing mechanism consists of a mixing hopper and a mixing silo, which are connected by a screw conveyor mixer to transport the mixture, the garbage crushing silo and the sludge pool are connected to the mixing hopper, the mixing silo is connected to the first granulator, the first granulator is connected to the kiln drying and incineration system, and the granulated granular material is sent into the kiln drying and incineration system.

[0011] As a preferred embodiment: the kiln type drying and incineration system consists of a drying kiln, an ultra-high temperature decomposition kiln, a pyrolysis incineration rotary kiln, and a steam boiler, all of which are arranged in a semi-sealed drying and incineration workshop, and the semi-sealed drying and incineration workshop forms an insulated negative pressure zone, wherein the first granulator is connected to the drying kiln, and a ventilation hole is opened at the connection, the drying kiln is connected to the pyrolysis incineration rotary kiln, and a second granulator is arranged between the drying kiln and the pyrolysis incineration rotary kiln, and the dried garbage is compacted and granulated again, one end of the pyrolysis incineration rotary kiln is connected to the ultra-high temperature decomposition kiln, and the flue gas is neutralized and combustible gas is secondary burned, and the other end is connected to the ground trough, and the ground trough is connected to the ash bin through a dense pipe screw conveyor, the end of the ultra-high temperature decomposition kiln is connected to the steam boiler, and a cooling chamber is provided in the end of the ultra-high temperature decomposition kiln, and a fan is installed in the cooling chamber, which can instantly reduce the gas at the end of the kiln, and the steam boiler is connected to the power generation workshop to supply steam to the back-pressure steam turbine generator set in the power generation workshop for power generation.

[0012] Preferably, the waste heat steam in the power generation workshop is introduced into the pipe with air outlet holes in the semi-sealed drying and incineration workshop through the steam waste heat recovery pipe. The pipe with air outlet holes is distributed on the surrounding walls and arranged at the ventilation holes to mix and preheat the air entering the ventilation holes for use as combustion gas for the pyrolysis incineration rotary kiln. The pipes with air outlet holes on the remaining surrounding walls keep the entire drying and incineration workshop continuously warm.

[0013] Preferably, the steam boiler is also connected to a drying kiln, and the waste heat flue gas discharged from the steam boiler is introduced into the drying kiln through a flue gas return pipe to dry and dehydrate the sludge particles in the drying kiln. A tail gas treatment tower is also installed at the end of the drying kiln to recover and treat the waste heat flue gas before discharge.

[0014] Preferably, the drying kiln is provided with 2 layers, wherein the upper layer is a granular material heating and conveying layer, one end of which is connected to the first granulator, and the other end is connected to the lower layer, the lower layer is a material drying and conveying layer, the material drying and conveying layer is connected to the second granulator, and the granular material is granulated again by the second granulator and then sent to the pyrolysis incineration rotary kiln for incineration, and quantitative feeders are arranged between the upper layer and the lower layer, the upper layer and the first granulator, and the lower layer and the second granulator, and quantitative transmission is achieved by the quantitative feeders.

[0015] A method for using a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system, the method comprising the following steps: 1) Classification and screening of garbage; 2) The combustible waste screened out in step 1 is made into granular materials; 3) The granulated materials are dried and incinerated in a four-stage temperature-controlled kiln; 4) The flue gas after incineration enters the steam boiler to generate steam for power generation in the power generation workshop.

[0016] As a preferred method: the specific method of screening and granulation in step 1-2) is: First, the garbage is placed in the garbage storage area to remain still. The liquid after the stillness flows into the sludge pool through the pipe. The remaining solid garbage is automatically sorted into combustible garbage and non-combustible garbage. The combustible garbage is shredded and placed in the garbage shredder bin for storage. Finally, the solid garbage in the shredder bin is mixed with the liquid garbage in the sludge pool. After mixing, it flows into the mixing silo through a screw conveyor mixer for storage, and then granulated by the first granulator.

[0017] As a preferred embodiment: the specific method of incineration and power generation in step 3-4) is as follows: the granular material in step 2) first enters a drying kiln for heating, dehydration and drying; the dried material is subjected to secondary compaction and granulation and then enters a pyrolysis and incineration rotary kiln through a conveyor belt for pyrolysis and incineration; the incinerated ash is sent to an ash bin for storage through a dense tube screw conveyor; the flue gas after incineration enters an ultra-high temperature decomposition kiln for harmful gas decomposition; the decomposed flue gas enters a steam boiler, and the water in the steam boiler is heated by the flue gas to generate steam; the steam enters a power generation workshop to supply power to a back-pressure steam turbine generator set; the waste heat of the steam discharged from the power generation workshop is introduced into a drying and incineration workshop through a heat dissipation pipeline, and is mixed with the oxygen in the through hole at the connection between the first granulator and the drying kiln, and then supplied to the pyrolysis and incineration rotary kiln for combustion; the odorous gas in the first granulator can be burned together; the waste heat flue gas discharged from the steam boiler enters the drying kiln through a flue gas recovery pipeline to heat, dehydrate and dry the material; the final flue gas exhaust enters an exhaust gas treatment tower through a hot gas heat dissipation pipeline for treatment and then discharged.

[0018] The beneficial effects of the present invention are as follows: 1) Using kilns instead of furnaces to dry and incinerate garbage sludge does not require coal and significantly reduces project costs and overall operating costs.

[0019] 2) Drying and incineration adopts four-stage temperature control technology to make the garbage sludge particles harmless during drying and incineration. [That is, low-temperature (<250°C) drying kiln dries the garbage sludge particles to avoid the release of benzene gases, and medium-high temperature (600-800°C) rotary kiln pyrolysis incineration provides combustible gas for secondary heating; the ultra-high temperature (about 1200°C) decomposition kiln after secondary combustion heating perfectly decomposes the harmful gases produced by the pyrolysis and incineration of garbage sludge particles; the ultra-high temperature (about 1200°C) flue gas after the decomposition of harmful gases is quickly cooled (within 1.5 seconds) to below 800°C at the end of the kiln to prevent the reversal of the decomposed harmful gases].

[0020] 3) The garbage sludge mixed granulation drying and incineration process can avoid the generation of dust and floating objects during the drying and incineration of garbage sludge, eliminate dust explosions and reduce the exhaust gas treatment load.

[0021] 4) The drying and incineration workshop adopts a micro-negative pressure insulation design to recover the radiation heat of the main equipment and the waste heat of boiler flue gas, the waste heat of back-pressure steam turbine steam, and the waste heat of ash, so as to maximize the calorific value of the garbage sludge.

[0022] 5) The oxygen-containing air required for the incineration of garbage sludge particles is drawn from the garbage sludge granulation workshop to prevent the overflow of odorous gases from the garbage sludge from affecting the surrounding environment.

[0023] The present invention adopts the mixed granulation of garbage sludge and drying incineration to avoid the generation of dust and floating objects, and adopts kiln instead of furnace for drying incineration without coal mixing; adopts four-stage temperature control drying incineration technology to avoid the release of benzene gas from garbage drying and the harmless emission of harmful gases generated by complete decomposition of garbage incineration; adopts micro-negative pressure insulation plant design to recover equipment radiation energy and flue gas, steam, ash and residual heat, so that the calorific value of garbage is highly resourced. The biggest highlight of this new concept of garbage power generation device is that garbage incineration power generation does not affect the surrounding environment; the miniaturization of garbage power generation device (station) is conducive to the decentralized disposal of garbage nearby and shortens the distance of garbage transportation; the unit investment per ton per day of cheap kiln equipment is reduced to one-fourth of that of existing garbage power plants. When the government cancels the preferential policies for garbage power generation (land acquisition, taxation and new energy electricity price subsidies), the investment return rate of garbage power generation enterprises is still as high as more than 24%. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to more clearly understand the objectives, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "up", "down", "left", "right", "inside", "outside", "horizontal" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1 As shown, a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system is composed of a power generation system 1, a kiln-type drying and incineration system 2, and a garbage mixing and granulating processing system 3. The garbage mixing and granulating processing system 3 is connected to an external garbage storage area 4 to pre-treat the garbage. The treated garbage is connected to the kiln-type drying and incineration system, and the heat energy generated after incineration is connected to the power generation system 1 for power generation. The power generation system 1, the kiln-type drying and incineration system 2, and the garbage mixing and granulating processing system 3 are all controlled by a control system 5. The control system 5, the power generation system 1, the kiln-type drying and incineration system 2, and the garbage mixing and granulating processing system 3 are all located in an integral factory building 6. The size of the factory building is preferably 85m long and 50m wide. The power generation system 1 is located in a power generation workshop 7, the kiln-type drying and incineration system 2 is located in a drying and incineration workshop 8, the garbage mixing and granulating processing system 3 is located in a garbage sludge mixing and granulating workshop 9, and the control system 5 is located in a control room 10 on the second floor of the factory building. A rest room 11 is also provided on one side of the control room 10. The garbage mixing and granulating processing system 3 is composed of a sorting mechanism 12, a mixing mechanism 13, a first granulator 14, and a second granulator 41, wherein the sorting mechanism 12 is composed of a sludge pool 15, a sorting machine 16, a shredder 17, and a garbage shredder bin 18, wherein the sludge pool 15 and the sorting machine 16 are respectively connected to the external garbage storage area 4, and the liquid garbage in the garbage storage area 4 flows into the sludge pool 15 through a pipeline 19, and the solid garbage is sorted by the sorting machine 16, and the sorted combustible garbage enters the shredder 17 for shredding and is then sent to the garbage shredder bin 18, and the non-combustible garbage is put into the non-combustible garbage storage area 20 for sending out for processing, and the garbage shredder bin 18 and the sludge pool 15 are connected to the mixing mechanism 13. A duty room 36 can be set up in the non-combustible garbage storage area and the garbage shredder bin 18 for manual supervision.

[0028] The mixing mechanism 13 is composed of a mixing hopper 21 and a mixing bin 22, which are connected by a screw conveyor mixer 23 to transport the mixture. The garbage crushing bin 18 and the sludge pool 15 are connected to the mixing hopper 21, and the mixing bin 22 is connected to the first granulator 14. The first granulator 14 is connected to the kiln drying and incineration system 2 to deliver the granulated granular material into the kiln drying and incineration system 2.

[0029] The drying and incineration of granular materials can effectively avoid the generation of dust and floating objects. The granular materials are dried at low and high temperatures (<250°C) to avoid the release of benzene gases. The medium and high temperature pyrolysis and incineration produce high temperature flue gas and combustible gas. The secondary combustion of combustible gas raises the temperature to meet the decomposition temperature of ultra-high temperature harmful gases. The ultra-high temperature flue gas after the decomposition of harmful gases is cooled to below 800°C within 1.5 seconds to prevent the decomposition of harmful gases from returning. The four-stage temperature-controlled drying and incineration technology of granular materials makes the harmful gases completely harmless. The tail gas treatment tower only needs to deal with the odorous gases generated by drying and the low-load dust and sulfur and nitrate, and the tail gas can be discharged harmlessly.

[0030] The kiln type drying and incineration system 2 is composed of a drying kiln 24, an ultra-high temperature decomposition kiln 25, a pyrolysis incineration rotary kiln 26, and a steam boiler 27, all of which are arranged in a semi-sealed drying and incineration workshop 8, and the semi-sealed drying and incineration workshop 8 forms an insulating negative pressure zone 35, wherein the first granulator 14 is connected to the drying kiln 24, and a ventilation hole 39 is opened at the connection, the drying kiln 24 is connected to the pyrolysis incineration rotary kiln 26, and a second granulator 41 is arranged between the drying kiln 24 and the pyrolysis incineration rotary kiln 26, and the dried garbage is compacted and granulated again, and the thermal One end of the decomposition incineration rotary kiln 26 is connected to the ultra-high temperature decomposition kiln 25 to neutralize the flue gas and the combustible gas for secondary combustion, and the other end is connected to the ground trough 28, and the ground trough 28 is connected to the ash bin 30 through a dense pipe screw conveyor 29. The end of the ultra-high temperature decomposition kiln 25 is connected to the steam boiler 27. A cooling chamber 42 is provided at the end of the ultra-high temperature decomposition kiln 25. A fan 43 is installed in the cooling chamber 42 to instantly reduce the gas at the end of the kiln. The steam boiler 27 is connected to the power generation workshop 7 to supply steam to the back-pressure steam turbine generator set in the power generation workshop 7 for power generation.

[0031] The function of the drying and incineration workshop in the heat-insulating negative pressure zone of the present invention is to recycle the radiation heat of the equipment in the drying and incineration workshop, the waste heat of boiler flue gas, the waste heat of steam from turbines, and the waste heat of ash. An oxygen-containing air inlet is provided between the drying and incineration workshop and the granulation workshop, and the odorous oxygen-containing air from the granulation workshop is sucked in by negative pressure for incineration supply, which can also prevent the odorous gas from overflowing outside the factory.

[0032] The waste heat of steam in the power generation workshop 7 flows into the semi-sealed drying and incineration workshop 8 through the waste heat recovery pipe 38 , and is mixed with the air entering through the ventilation hole 39 to be used as combustion gas for supplying the pyrolysis incineration rotary kiln 26 .

[0033] The waste heat steam in the power generation workshop 7 is introduced into the pipe 45 with air outlet holes 44 in the semi-sealed drying and incineration workshop 8 through the steam waste heat recovery pipe 38. The pipe 45 with air outlet holes 44 is distributed on the surrounding walls and arranged at the ventilation holes 39 to mix and preheat the air entering the ventilation holes 39 for use as combustion gas for the pyrolysis incineration rotary kiln 26. The pipes 45 with air outlet holes 44 on the other surrounding walls keep the entire drying and incineration workshop 8 warm.

[0034] The steam boiler 27 is also connected to the drying kiln 24, and the waste heat flue gas discharged by the steam boiler 27 is introduced into the drying kiln 24 through the flue gas return pipe 40 to dry and dehydrate the sludge particles in the drying kiln 24. An exhaust gas treatment tower 31 is also installed at the end of the drying kiln 24 to recover and treat the waste heat flue gas before discharge.

[0035] The drying kiln 24 is provided with two layers in total, wherein the upper layer is a granular material heating and conveying layer 32, one end of which is connected to the first granulator 14, and the other end is connected to the lower layer, the lower layer is a material drying and conveying layer 33, the material drying and conveying layer 33 is connected to the second granulator, and the granular material is sent to the pyrolysis incineration rotary kiln 26 for incineration after being granulated again by the second granulator 41, and quantitative feeders 34 are arranged between the upper layer and the lower layer, the upper layer and the first granulator 14, and the lower layer and the second granulator 41, and quantitative transmission is achieved by the quantitative feeder 34.

[0036] A method for using a four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system, the method comprising the following steps: 1) Classification and screening of garbage; 2) The combustible waste screened out in step 1 is made into granular materials; 3) The granulated materials are dried and incinerated in a four-stage temperature-controlled kiln; 4) The flue gas after incineration enters the steam boiler to generate steam for power generation in the power generation workshop.

[0037] The specific method of screening and granulation in step 1-2) is: First, the garbage is placed in the garbage storage area 4 to remain stationary. The liquid after the stationary state flows into the sludge pool 15 through the pipeline. The remaining solid garbage is automatically sorted to separate the combustible garbage and the non-combustible garbage. The combustible garbage is shredded and placed in the garbage crushing bin 18 for storage. Finally, the solid garbage in the crushing bin 18 is mixed with the liquid garbage in the sludge pool 15. After mixing, it flows into the mixing bin 22 for storage through the screw conveyor mixer 23, and then granulated by the first granulator 14.

[0038] The specific method of incineration and power generation in step 3-4) is: The granular material in step 2) first enters the drying kiln 24 for heating, dehydration and drying. After the drying, the material is compressed and granulated for the second time and then enters the pyrolysis and incineration rotary kiln through a conveyor belt for pyrolysis and incineration. The ash after incineration is sent to the ash bin for storage through a dense tube screw conveyor. The flue gas after incineration enters the ultra-high temperature decomposition kiln 25 for harmful gas decomposition. The decomposed flue gas enters the steam boiler 27, and the water in the steam boiler 27 is heated by the flue gas to generate steam. The steam enters the power generation workshop to supply the back pressure steam turbine generator set with power generation. The waste heat of the steam discharged from the power generation workshop is introduced into the drying and incineration workshop through the heat dissipation pipe 37, and is mixed with the oxygen in the through hole at the connection between the first granulator and the drying kiln 24 and then supplied to the pyrolysis and incineration rotary kiln for combustion, so that the odorous gas in the first granulator can be burned together. The waste heat flue gas discharged by the steam boiler enters the drying kiln through the flue gas recovery pipe to heat, dehydrate and dry the material. The final flue gas exhaust enters the exhaust gas treatment tower 31 through the hot gas heat dissipation pipe 37 for treatment and then discharge.

[0039] The design features of the present invention are as follows: 1) Using kilns instead of furnaces to dry and incinerate garbage sludge does not require coal and significantly reduces project costs and overall operating costs.

[0040] 2) Drying and incineration adopts four-stage temperature control technology to make the garbage sludge particles harmless during drying and incineration. [That is, low-temperature (<250°C) drying kiln dries the garbage sludge particles to avoid the release of benzene gases, and medium-high temperature (600-800°C) rotary kiln pyrolysis incineration provides combustible gas for secondary heating; the ultra-high temperature (about 1200°C) decomposition kiln after secondary combustion heating perfectly decomposes the harmful gases produced by the pyrolysis and incineration of garbage sludge particles; the ultra-high temperature (about 1200°C) flue gas after the decomposition of harmful gases is quickly cooled (within 1.5 seconds) to below 800°C at the end of the kiln to prevent the reversal of the decomposed harmful gases].

[0041] 3) The garbage sludge mixed granulation drying and incineration process can avoid the generation of dust and floating objects during the drying and incineration of garbage sludge, eliminate dust explosions and reduce the exhaust gas treatment load.

[0042] 4) The drying and incineration workshop adopts a micro-negative pressure insulation design to recover the radiation heat of the main equipment and the waste heat of boiler flue gas, the waste heat of back-pressure steam turbine steam, and the waste heat of ash, so as to maximize the calorific value of the garbage sludge.

[0043] 5) The oxygen-containing air required for the incineration of garbage sludge particles is drawn from the garbage sludge granulation workshop to prevent the overflow of odorous gases from the garbage sludge and affect the surrounding environment.

[0044] The present invention adopts the mixed granulation of garbage sludge and drying incineration to avoid the generation of dust and floating objects, and adopts kiln instead of furnace for drying incineration without coal mixing; adopts four-stage temperature control drying incineration technology to avoid the release of benzene gas from garbage drying and the harmless emission of harmful gases generated by complete decomposition of garbage incineration; adopts micro-negative pressure insulation plant design to recover equipment radiation energy and flue gas, steam, ash and residual heat, so that the calorific value of garbage is highly resourced. The biggest highlight of this new concept of garbage power generation device is that garbage incineration power generation does not affect the surrounding environment; the miniaturization of garbage power generation device (station) is conducive to the decentralized disposal of garbage nearby and shortens the distance of garbage transportation; the unit investment per ton per day of cheap kiln equipment is reduced to one-fourth of that of existing garbage power plants. When the government cancels the preferential policies for garbage power generation (land acquisition, taxation and new energy electricity price subsidies), the investment return rate of garbage power generation enterprises is still as high as more than 24%.

[0045] In order to ensure the overall stable operation, a gas (or fuel) supply room 46 can be set up in the factory to provide heat source for the initial startup of the pyrolysis incineration rotary kiln and emergency energy replenishment when the temperature of the ultra-high temperature harmful gas decomposition kiln is insufficient. The control system is connected to all the power and real-time monitoring information of the garbage treatment system, drying incineration system, and power generation system, and automatically adjusts the material ratio, logistics volume, smoke temperature, and smoke volume according to the real-time information feedback of the system to keep the equipment in a good operating state. Example

[0046] The four-stage temperature-controlled kiln-type garbage sludge particle drying and incineration power generation (station) system of the present invention is provided with a granulation line in the garbage sludge granulation workshop. Starting from the garbage storage area 4 and the sludge pool 15 for raw garbage and sludge preparation, the garbage enters the automatic sorting machine to sort the garbage into combustible garbage and non-combustible garbage. The non-combustible garbage is sent to the non-combustible garbage storage area for transportation. The combustible garbage is shredded by the shredder and enters the garbage shredder bin 18 and the sludge in the sludge pool 15. They are simultaneously sent to the batching hopper according to the set ratio, and the garbage sludge is sent to the mixing bin 22 by the spiral conveying mixer 23. Then, the first granulator 14 completes the granulation and sends it to the drying and incineration workshop 8 for drying and incineration.

[0047] The garbage sludge particles entering the drying and incineration workshop are spread on the heating conveyor belt above the drying kiln through the quantitative feeder in the hopper, and the garbage sludge particles heated by the high-temperature air in the workshop are sent to the quantitative feeder hopper of the drying conveyor belt. The quantitative feeder then sends the heated garbage sludge particles to the drying conveyor belt in the kiln for dehydration and drying. The dried garbage sludge particles are discharged from the drying kiln and sent to the hopper of the quantitative feeder of the pyrolysis incineration kiln, and fed into the pyrolysis incineration rotary kiln for pyrolysis incineration. The ash after incineration is discharged into the ash bin of the ground trough, and the ash is sent to the ash storage 30 by the dense tube screw conveyor. The flue gas and combustible gas after pyrolysis incineration enter the secondary combustion chamber of the ultra-high temperature decomposition kiln 25, forming harmful gases generated by ultra-high temperature decomposition and pyrolysis incineration. The ultra-high temperature flue gas (about 1200℃) after the decomposition of the harmful gas is quickly cooled (within 1.5 seconds) to below 800℃ in the cooling chamber at the end of the kiln to avoid the decomposition of the harmful gas. The flue gas cooled to below 800℃ is introduced into the boiler to produce steam. The produced steam is sent to the power generation workshop for the back pressure steam turbine generator set to generate electricity. The waste heat of the steam discharged by the steam turbine is introduced into the drying and incineration workshop through the heat dissipation pipeline 37 for heat dissipation and recovery of waste heat. The condensed water in the heat dissipation pipeline is discharged into the sewer. The waste heat flue gas after the boiler produces steam is sent to the drying kiln to dry the garbage sludge particles. The waste heat flue gas dried by the drying kiln is again dissipated and recycled by the waste heat heat dissipation pipeline section at the end of the kiln. Finally, the flue gas is sent to the tail gas treatment tower by the induced draft fan to eliminate odorous gases and a small amount of sulfur and nitrate dust before harmless discharge.

[0048] It is worth noting that the four-stage temperature-controlled kiln-type garbage sludge particle drying and incineration power generation (station) system of the present invention uses the current conventional technical equipment, and engineers in this field can complete the design and construction. The stable operation of the drying kiln drying and incineration system is controlled by the four-stage temperature control software (omitted).

[0049] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system, which consists of a power generation system, a kiln-type drying and incineration system, and a garbage mixed granulation processing system, and is characterized by: The garbage mixing and granulating treatment system is connected to an external garbage storage area to pre-treat the garbage. The treated garbage is connected to a kiln-type drying and incineration system, and is connected to a power generation system through the heat energy generated after incineration for power generation. The power generation system, the kiln-type drying and incineration system, and the garbage mixing and granulating treatment system are all controlled by a control system. The control system, the power generation system, the kiln-type drying and incineration system, and the garbage mixing and granulating treatment system are all located in an integrated factory building, wherein the power generation system is located in a power generation workshop, the kiln-type drying and incineration system is located in a drying and incineration workshop, the garbage mixing and granulating treatment system is located in a garbage sludge mixing and granulating workshop, and the control system is located in a control room on the second floor of the factory building, and a rest room is also provided on one side of the control room.

2. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 1 is characterized in that: The garbage mixing and granulation processing system is composed of a sorting mechanism, a mixing mechanism, a first granulator, and a second granulator, wherein the sorting mechanism is composed of a sludge pool, a sorting machine, a shredder, and a garbage shredder bin, wherein the sludge pool and the sorting machine are respectively connected to an external garbage storage area, and the liquid garbage in the garbage storage area flows into the sludge pool through a pipeline, and the solid garbage is sorted by the sorting machine, and the sorted combustible garbage enters the shredder for shredding and is then sent to the garbage shredder bin, and the non-combustible garbage is put into the non-combustible garbage storage area for sending out for treatment, and the garbage shredder bin and the sludge pool are connected to the mixing mechanism.

3. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 2 is characterized in that: The mixing mechanism consists of a mixing hopper and a mixing silo, which are connected by a screw conveyor mixer to transport the mixture. The garbage crushing silo and the sludge pool are connected to the mixing hopper, the mixing silo is connected to the first granulator, and the first granulator is connected to the kiln drying and incineration system to feed the granulated granular material into the kiln drying and incineration system.

4. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 3 is characterized in that: The kiln type drying and incineration system is composed of a drying kiln, an ultra-high temperature decomposition kiln, a pyrolysis incineration rotary kiln, and a steam boiler, all of which are arranged in a semi-sealed drying and incineration workshop, and the semi-sealed drying and incineration workshop forms an insulated negative pressure zone, wherein the first granulator is connected to the drying kiln, and a ventilation hole is opened at the connection, the drying kiln is connected to the pyrolysis incineration rotary kiln, and a second granulator is arranged between the drying kiln and the pyrolysis incineration rotary kiln, and the dried garbage is compacted and granulated again, one end of the pyrolysis incineration rotary kiln is connected to the ultra-high temperature decomposition kiln, and the flue gas is neutralized and combustible gas is secondary burned, and the other end is connected to the ground trough, and the ground trough is connected to the ash bin through a dense pipe screw conveyor, the end of the ultra-high temperature decomposition kiln is connected to the steam boiler, and a cooling chamber is provided in the end of the ultra-high temperature decomposition kiln, and a fan is installed in the cooling chamber, which can instantly reduce the gas at the end of the kiln, and the steam boiler is connected to the power generation workshop, and steam is supplied to the back-pressure steam turbine generator set in the power generation workshop for power generation.

5. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 4 is characterized in that: The waste heat steam in the power generation workshop is introduced into the pipe with air outlet holes in the semi-sealed drying and incineration workshop through the steam waste heat recovery pipe. The pipe with air outlet holes is distributed on the surrounding walls and arranged at the ventilation holes to mix and preheat the air entering the ventilation holes for use as combustion gas for the pyrolysis incineration rotary kiln. The pipes with air outlet holes on the other surrounding walls keep the entire drying and incineration workshop continuously warm.

6. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 4 is characterized in that: The steam boiler is also connected to the drying kiln, and the waste heat flue gas discharged by the steam boiler is introduced into the drying kiln through the flue gas return pipe to dry and dehydrate the sludge particles in the drying kiln. An exhaust gas treatment tower is also installed at the end of the drying kiln to recover and treat the waste heat flue gas before discharge.

7. The four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 6 is characterized in that: The drying kiln is provided with 2 layers in total, wherein the upper layer is a granular material heating and conveying layer, one end of which is connected to the first granulator, and the other end is connected to the lower layer, the lower layer is a material drying and conveying layer, the material drying and conveying layer is connected to the second granulator, and the granular material is granulated again by the second granulator and then sent to the pyrolysis incineration rotary kiln for incineration, and quantitative feeders are arranged between the upper layer and the lower layer, the upper layer and the first granulator, and the lower layer and the second granulator, and quantitative transmission is achieved by the quantitative feeders.

8. The method for using the four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: 1) Classification and screening of garbage; 2) The combustible waste screened out in step 1 is made into granular materials; 3) The granulated materials are dried and incinerated in a four-stage temperature-controlled kiln; 4) The flue gas after incineration enters the steam boiler to generate steam for power generation in the power generation workshop.

9. The method for using the four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 8 is characterized in that: The specific method of screening and granulation in step 1-2) is: First, the garbage is placed in the garbage storage area to remain still. The liquid after the stillness flows into the sludge pool through the pipe. The remaining solid garbage is automatically sorted into combustible garbage and non-combustible garbage. The combustible garbage is shredded and placed in the garbage shredder bin for storage. Finally, the solid garbage in the shredder bin is mixed with the liquid garbage in the sludge pool. After mixing, it flows into the mixing silo through a screw conveyor mixer for storage, and then granulated by the first granulator.

10. The method for using the four-stage temperature-controlled kiln-type garbage particle drying and incineration coupled power generation system according to claim 8, characterized in that: The specific method of incineration and power generation in step 3-4) is: The granular material in step 2) first enters the drying kiln for heating, dehydration and drying. After the drying, the material is compressed and granulated for the second time and then enters the pyrolysis and incineration rotary kiln through a conveyor belt for pyrolysis and incineration. The ash after incineration is sent to the ash bin for storage through a dense tube screw conveyor. The flue gas after incineration enters the ultra-high temperature decomposition kiln for harmful gas decomposition. The decomposed flue gas enters the steam boiler, and the water in the steam boiler is heated by the flue gas to generate steam. The steam enters the power generation workshop to supply the back pressure steam turbine generator set to generate electricity. The waste heat of the steam discharged from the power generation workshop is introduced into the drying and incineration workshop through the heat dissipation pipeline, and is mixed with the oxygen in the through hole at the connection between the first granulator and the drying kiln, and then supplied to the pyrolysis and incineration rotary kiln for combustion, so that the odorous gas in the first granulator can be burned together. The waste heat flue gas discharged by the steam boiler enters the drying kiln through the flue gas recovery pipeline to heat, dehydrate and dry the material. The final flue gas exhaust enters the exhaust gas treatment tower through the hot gas heat dissipation pipeline for treatment and then discharged.

Images