Household garbage pyrolysis gas purification power generation system

Abstract

The invention discloses a household garbage pyrolysis gas purification power generation system. Through cooperation of the physical filtering system, the main high-voltage filtering system, the auxiliary high-voltage filtering system, the switching pipeline system, the main filter, the auxiliary dry filter and the power generation system, stable and reliable purification of pyrolysis gas obtained in a small-capacity household garbage treatment scene is achieved, and the purified pyrolysis gas is used for power generation.

Description

Technical Field

[0001] The invention relates to a domestic garbage pyrolysis gas purification power generation system. Background Art

[0002] Domestic waste, straw, etc. are pyrolyzed to produce gas, and the resulting pyrolysis gas can be used for combustion.

[0003] Chinese utility model patent CN203319934U proposes a bio-oil composite condensation collection device based on electric capture, including: a sleeve condenser for condensing biomass pyrolysis steam; a primary oil storage tank for collecting the condensed primary bio-oil; an electric capture collector with a condensation jacket for enriching the oil phase components in the primary pyrolysis gas under the action of a high-voltage electric field to produce secondary bio-oil and secondary pyrolysis gas; a secondary oil storage tank for collecting the secondary bio-oil; a high-voltage generator for providing a DC high voltage to the electric capture collector with a condensation jacket; a circulating bath for circulating heat dissipation of the condensing medium; a filter for filtering and purifying the secondary pyrolysis gas after electric capture to collect the tertiary bio-oil, and a tertiary oil storage tank for collecting the tertiary bio-oil. The device is suitable for purifying biomass pyrolysis gas, but not for purifying domestic waste pyrolysis gas. Summary of the invention

[0004] The present invention provides a pyrolysis gas purification power generation system, which is suitable for purifying pyrolysis gas of domestic waste with more complex components.

[0005] The technical solution of the present invention is as follows: A system for purifying power generation from pyrolysis gas of domestic waste, comprising:

[0006] A physical filtration system configured to perform a first stage filtration of the pyrolysis gas of domestic waste by settling tar and impurities in the pyrolysis gas of domestic waste by relying on gravity and a change in the direction of movement;

[0007] The main high-voltage electric filtration system and the slave high-voltage electric filtration system are both configured to perform second-stage filtration on the pyrolysis gas of domestic waste by relying on direct current high-voltage electricity, and both can be controlled to be in an offline state or an online state;

[0008] A switching pipeline system configured to switch the series-parallel relationship between the main high-voltage electric filter system and the slave high-voltage electric filter system;

[0009] The main dry filter and the secondary dry filter are connected in parallel and can be controlled to be in an offline state or an online state. Both rely on replaceable internal fillers to absorb tar, impurities, sulfides and moisture, thereby performing a third-level filtration of the pyrolysis gas of domestic waste;

[0010] The power generation system is configured to receive the pyrolysis gas of domestic waste after three-stage filtration and burn it to generate electricity.

[0011] Optionally, the physical filtration system includes two branch pipelines, a first branch valve and a second branch valve respectively arranged on the two branch pipelines;

[0012] The main high-voltage electric filtration system includes: a main high-voltage generator, a main mechanical tower body, a first main valve, a first main collecting box, a main circulating water pump, two main circulating water valves, a main circulating water pipeline, a main gas outlet valve, a main gas outlet pipeline, and an anode plate and a cathode plate located inside the main mechanical tower body and facing each other;

[0013] The bottom of the main mechanical tower is connected to the outlet of the physical filtration system through a branch pipeline;

[0014] The main high voltage generator is configured to generate a DC high voltage electric field between a cathode plate and an anode plate within the main mechanical tower body;

[0015] The first main valve is configured to control the connection and disconnection between the bottom of the main mechanical tower and the first main collecting box;

[0016] The first end of the main circulating water pipeline is connected to the bottom of the main mechanical tower body, and the second end of the main circulating water pipeline is connected to the top of the main mechanical tower body. The main circulating water pump is arranged on the main circulating water pipeline, and is used to pump the flushing liquid accumulated at the bottom of the main mechanical tower body to the top of the main mechanical tower body to flush the cathode plate and the anode plate. Two main circulating water valves are arranged at the front and rear ends of the main circulating water pump;

[0017] The first end of the main gas outlet pipeline is connected to the top outlet of the main mechanical tower body, the second end of the main gas outlet pipeline is connected to the inlets of the main dry filter and the secondary dry filter, and the main gas outlet valve is arranged on the main gas outlet pipeline;

[0018] The secondary high-voltage electric filtration system comprises: a secondary high-voltage generator, a secondary mechanical tower body, a first secondary valve, a first secondary collecting box, a secondary circulating water pump, two secondary circulating water valves, a secondary circulating water pipeline, a secondary gas outlet valve, a secondary gas outlet pipeline, and an anode plate and a cathode plate located inside the secondary mechanical tower body and opposite to each other;

[0019] The outlet of the physical filtration system is connected from the bottom of the mechanical tower body through another branch pipeline;

[0020] The slave high voltage generator is configured to generate a DC high voltage electric field between a cathode plate and an anode plate within the slave mechanical tower body;

[0021] The first slave valve is configured to control the connection and disconnection between the bottom of the slave mechanical tower body and the first slave collection box;

[0022] The first end of the slave circulating water pipeline is connected to the bottom of the slave mechanical tower body, and the second end of the slave circulating water pipeline is connected to the top of the slave mechanical tower body. The slave circulating water pump is arranged on the slave circulating water pipeline, and is used to pump the flushing liquid accumulated at the bottom of the slave mechanical tower body to the top of the slave mechanical tower body to flush the cathode plate and the anode plate. Two slave circulating water valves are arranged at the front and rear ends of the slave circulating water pump;

[0023] A first end of a secondary gas outlet pipeline is connected to the top outlet of the secondary mechanical tower body, a second end of the secondary gas outlet pipeline is connected to the inlets of the secondary dry filter and the secondary dry filter, and a secondary gas outlet valve is arranged on the secondary gas outlet pipeline;

[0024] The switching pipeline system is connected between the top outlet of the slave machinery tower body and the bottom inlet of the main machinery tower body or between the top outlet of the main machinery tower body and the bottom inlet of the slave machinery tower body.

[0025] Optionally, the main stem filter includes a main structural body, a main internal filler, a second main valve, a second main collection box, a main outlet valve, and a main inlet valve;

[0026] The main internal filler is arranged inside the main structure body, the second main valve is used to control the on-off between the bottom of the main structure body and the second main collecting box, the main inlet valve is arranged on the inlet pipeline of the main structure body, and the main outlet valve is arranged on the outlet pipeline of the main structure body;

[0027] The secondary dry filter comprises a secondary structural body, secondary internal fillers, a second secondary valve, a second secondary collection box, a secondary outlet valve, and a secondary inlet valve;

[0028] The internal filler is arranged inside the slave structure body, the second slave valve is used to control the on-off between the bottom of the slave structure body and the second slave collection box, the slave inlet valve is arranged on the inlet pipeline of the slave structure body, and the slave outlet valve is arranged on the outlet pipeline of the slave structure body.

[0029] Optionally, it also includes a booster fan and a flame arrester, wherein the booster fan is used to pressurize the outlet gases of the main dry filter and the secondary dry filter, and the flame arrester is used to block the flame from propagating from the power generation system to the booster fan.

[0030] Optionally, the physical filtration system includes a filter body, a body valve, a primary collection box, an emergency valve, a first branch valve, a second branch valve, a main line, an emergency discharge line, and a branch line;

[0031] The body valve is arranged between the bottom of the filter body and the primary collection box;

[0032] The emergency discharge pipeline is connected between the outlet of the filter body and the atmosphere, and the emergency valve is arranged on the emergency discharge pipeline;

[0033] The first end of the main pipeline is connected to the outlet of the filter body, and the second end of the main pipeline is simultaneously connected to the first ends of the two branch pipelines;

[0034] The first branch valve and the second branch valve are respectively arranged on two branch pipelines, and the second ends of the two branch pipelines are respectively connected to the main high-voltage electric filtering system and the slave high-voltage electric filtering system.

[0035] The system is relatively simple and has a good effect on reducing, harmlessly treating and recycling domestic waste. The calorific value of domestic waste can be effectively utilized, and green electricity can be exported to store electricity and charge new energy vehicles, which is beneficial to the country's carbon emission reduction. It has important practical application value.

[0036] The series-parallel switching between the main high-voltage electric filtration system and the slave high-voltage electric filtration system can ensure the efficient and continuous operation of the system and improve reliability. The parallel design of the main dry filter and the slave dry filter improves the continuity of system operation. The use of dry filters makes the internal filler replacement easy and also ensures the continuous operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the pyrolysis gas purification power generation system of the present invention.

[0038] The reference numerals are as follows:

[0039] 1. Physical filtration system; 11. Filter body; 12. Body valve; 13. Primary collection box; 14. Emergency valve; 15. First branch valve; 16. Second branch valve; 17. Main pipeline; 18. Emergency discharge pipeline; 19. Branch pipeline;

[0040] 2. Main high-voltage electric filtration system; 21. Main high-voltage generator; 22. Main mechanical tower; 23. First main valve; 24. First main collection box; 25. Main circulating water pump; 26. Main circulating water valve; 27. Main circulating water pipeline; 28. Main gas outlet valve; 29. ​​Main gas outlet pipeline;

[0041] 3. From the high-voltage electric filtration system; 31. From the high-voltage generator; 32. From the mechanical tower; 33. From the first slave valve; 34. From the first slave collection box; 35. From the circulating water pump; 36. From the circulating water valve; 37. From the circulating water pipeline; 38. From the gas outlet valve; 39. From the gas outlet pipeline;

[0042] 4. Switching pipeline system; 41. Electric valve; 42. Manual valve; 43. Switching pipeline;

[0043] 5. Main dry filter; 51. Main structure body; 52. Main internal filler; 53. Second main valve; 54. Second main collection box; 55. Main outlet valve; 56. Main inlet valve;

[0044] 6. From the dry filter; 61. From the structural body; 62. From the internal filler; 63. The second from the valve; 64. The second from the collection box; 65. From the outlet valve; 66. The dry filter output pipeline; 67. From the inlet valve;

[0045] 7. Booster fan;

[0046] 8. Flame arrester;

[0047] 9. Power generation system. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0049] like Figure 1 As shown, the pyrolysis gas purification power generation system includes: a physical filtration system 1, a main high-voltage electric filtration system 2, a slave high-voltage electric filtration system 3, a switching pipeline system 4, a main dry filter 5, a slave dry filter 6, a booster fan 7, a flame arrester 8, and a power generation system 9.

[0050] The pyrolysis gas comes from the gasifier at the front end. The temperature of the pyrolysis gas of domestic waste is 80-120°C (much lower than the temperature of the pyrolysis gas of biomass, which is usually 400-900°C). The pyrolysis gas of domestic waste contains impurities such as tar, particulate matter, and moisture, which need to be purified before the power generation system 9 can generate electricity.

[0051] The physical filtration system 1 includes a filter body 11 , a body valve 12 , a primary collection box 13 , an emergency valve 14 , a first branch valve 15 , a second branch valve 16 , a main line 17 , an emergency discharge pipeline 18 , and a branch pipeline 19 .

[0052] The tar contained in the pyrolysis gas from the gasifier is in liquid form, with a concentration of about 5 to 50 g / Nm 3 , and meet the index requirements through three-level filtration.

[0053] The filter body 11 is made of carbon steel or stainless steel, and the internal gas flow rate is controlled at 1 to 8 m / s. The volume is determined according to the flow rate during design. The number of baffles set inside the filter body 11 can be 1 to 6 levels. The function of the baffle is to change the gas flow direction, increase the mileage of the gas flow and change the direction of the gas flow. The outside of the filter body 11 needs to be insulated, and the thickness of the insulation layer is 50 to 200 mm.

[0054] The body valve 12 and the primary collection box 13 are installed at the lower part of the filter body 11. The body valve 12 controls the on-off between the filter body 11 and the primary collection box 13. The primary collection box 13 is used to temporarily store the tar and impurities captured by the physical filtration system 1. The body valve 12 is opened and closed regularly.

[0055] The pyrolysis gas discharged from the filter body 11 enters the subsequent process section through the main pipeline 17 .

[0056] The first end of the emergency discharge pipeline 18 is connected to the main pipeline 17, and the second end of the emergency discharge pipeline 18 is connected to the atmosphere. An emergency valve 14 is arranged on the emergency discharge pipeline 18. When a failure occurs during the operation of the subsequent working section, the emergency valve 14 is controlled to open, and the pyrolysis gas is directly discharged to the atmosphere through the emergency discharge pipeline 18 to ensure the safety of the system.

[0057] Each electric valve in the present invention is controlled by a master controller (not shown).

[0058] The main line 17 continues to pass through the first branch valve 15, the second branch valve 16 and the branch pipeline 19 to divide into two paths for the second stage filtration system. The second stage filtration system includes a main high-voltage electric filtration system 2 and a slave high-voltage electric filtration system 3, which are controlled to be connected in series, in parallel or only one of them is connected to the front and rear stage filtration systems.

[0059] The main high-voltage electric filtration system 2 includes a main high-voltage generator 21, a main mechanical tower body 22, a first main valve 23, a first main collecting box 24, a main circulating water pump 25, two main circulating water valves 26, a main circulating water pipeline 27, a main gas outlet valve 28, and a main gas outlet pipeline 29.

[0060] The pyrolysis gas enters the main mechanical tower body 22 through the branch pipeline 19, and a cathode plate (not marked) and an anode plate (not marked) facing each other are arranged in the main mechanical tower body 22. The main high-voltage generator 21 connects the cathode plate and the anode plate, so that a high-voltage electric field is generated between the cathode plate and the anode plate inside the main mechanical tower body 22. Corona discharge is generated between the positive and negative poles to form a strong electric field. The tar, dust, water mist and other particles in the pyrolysis gas passing through the electric field are combined with ions or electrons to be charged, and move to the two poles under the action of the electric field force and precipitate on the pole plates.

[0061] The main circulating water pump 25, two main circulating water valves 26, and the main circulating water pipeline 27 constitute a first circulating water flushing system. The first end of the main circulating water pipeline 27 is connected to the bottom of the main machinery tower body 22, and the second end of the main circulating water pipeline 27 is connected to the top spraying device (not shown) of the main machinery tower body 22. The main circulating water pump 25 is arranged on the main circulating water pipeline 27, and the two main circulating water valves 26 are respectively located at the front and rear ends of the main circulating water pump 25.

[0062] The main circulating water pump 25 is controlled to regularly extract the flushing liquid from the bottom of the main mechanical tower body 22, and flush the anode and cathode plates through the spray equipment to flush the tar and dust deposited on the anode and cathode plates. The first main valve 23 controls the connection and disconnection between the bottom of the main mechanical tower body 22 and the first main collection box 24. The first main valve 23 is opened regularly, and the first main collection box 24 regularly collects the flushing liquid with high concentration. Then, new flushing liquid is injected into the bottom of the main mechanical tower body 22 by manual or mechanical control.

[0063] The two ends of the main gas outlet pipeline 29 are respectively connected to the upper part of the main mechanical tower body 22 and the next level purification system. The main gas outlet valve 28 controls the on-off of the main gas outlet pipeline 29.

[0064] If the pyrolysis gas purification power generation system is controlled to operate in a state where only the main high-voltage electric filtration system is working, the purified pyrolysis gas continues to enter the next stage through the main gas outlet valve 28 and the main gas outlet pipeline 29.

[0065] The slave high-voltage electric filtration system 3 includes a slave high-voltage generator 31, a slave mechanical tower body 32, a first slave valve 33, a first slave collecting box 34, a slave circulating water pump 35, two slave circulating water valves 36, a slave circulating water pipeline 37, a slave gas outlet valve 38, and a slave gas outlet pipeline 39.

[0066] The pyrolysis gas enters the mechanical tower body 32 through the branch pipe 19, and a cathode plate (not marked) and an anode plate (not marked) facing each other are arranged in the mechanical tower body 32. The cathode plate and the anode plate are connected by the high-voltage generator 31, so that a high-voltage electric field is generated between the cathode plate and the anode plate inside the mechanical tower body 32. Corona discharge is generated between the positive and negative poles to form a strong electric field. The tar, dust, water mist and other particles in the pyrolysis gas passing through the electric field are combined with ions or electrons to be charged, and move to the two poles under the action of the electric field force and precipitate on the pole plates.

[0067] The secondary circulating water pump 35, two secondary circulating water pump valves 36, and secondary circulating water pipeline 37 constitute a second circulating water flushing system. The first end of the secondary circulating water pipeline 37 is connected to the bottom of the secondary mechanical tower body 32, and the second end of the secondary circulating water pipeline 37 is connected to the top spraying device (not shown) of the secondary mechanical tower body 32. The secondary circulating water pump 35 is arranged on the secondary circulating water pipeline 37, and the two secondary circulating water valves 36 are respectively located at the front and rear ends of the secondary circulating water pump 35.

[0068] The circulating water pump 35 is controlled to regularly extract the flushing liquid from the bottom of the mechanical tower body 32, and the anode and cathode plates are flushed through the spraying equipment to flush the tar and dust deposited on the anode and cathode plates. The first slave valve 33 controls the connection and disconnection between the bottom of the mechanical tower body 32 and the first slave collection box 34. The first slave valve 33 is opened regularly, and the first slave collection box 34 regularly collects the flushing liquid with high concentration. Then, new flushing liquid is injected from the bottom of the mechanical tower body 32 by manual or mechanical control.

[0069] The two ends of the secondary gas outlet pipeline 39 are respectively connected to the upper part of the secondary mechanical tower body 32 and the next level purification system. The secondary gas outlet valve 38 controls the on-off of the secondary gas outlet pipeline 39.

[0070] If the pyrolysis gas purification power generation system is controlled to operate in a state where only the high-voltage electric filtration system works, the purified pyrolysis gas continues to pass through the gas outlet valve 28 and the gas outlet pipeline 39 to enter the next stage.

[0071] The switching pipeline system 4 includes an electric valve 41, a manual valve 42, and a switching pipeline 43. The first end of the switching pipeline 43 is connected to the top of the slave mechanical tower body, and the second end of the switching pipeline 43 is connected to the bottom of the main mechanical tower body 22. By coordinating the switching pipeline system 4 with the slave circulating water pump 35 and the main circulating water pump 25, the main high-voltage electric filter system 2 and the slave high-voltage electric filter system 3 can realize the switching between the series connection state and the parallel connection state.

[0072] When one of the main high-voltage electric filter system 2 and the slave high-voltage electric filter system 3 needs to perform plate flushing, the system to be cleaned needs to be in an offline state. Only one system can be running and the other shut down.

[0073] For example, when the first branch valve 15, the secondary gas outlet valve 38, the electric valve 41 and the manual valve 42 are closed, and the second branch valve 16 and the main gas outlet valve 28 are opened, the pyrolysis gas can only enter the main high-voltage electric filter system 2 and flow from the main high-voltage electric filter system 2 into the next-level filter system.

[0074] For another example, when the second branch valve 16 , the main gas outlet valve 28 , the electric valve 41 and the manual valve 42 are closed, and the first branch valve 15 and the slave gas outlet valve 38 are opened, the pyrolysis gas can only enter the slave high-voltage electric filter system 3 .

[0075] During normal operation, only one of the main high-voltage electric filter system 2 and the slave high-voltage electric filter system 3 is required to operate.

[0076] If the tar and impurity content in the pyrolysis gas is detected to be high, the main controller closes the second branch valve 16 and the secondary gas outlet valve 38, opens the electric valve 41 and the manual valve 42, and allows the pyrolysis gas to first pass through the secondary high-voltage electric filter system 3 and then enter the main high-voltage electric filter system 2, and finally enter the next stage through the main gas outlet pipeline 29. The two-stage series connection can make the pyrolysis gas purification efficiency greater than 98%.

[0077] The main dry filter 5 and the secondary dry filter 6 are connected in parallel to facilitate the response to changes in working conditions and online replacement of fillers. After the two outlets are connected, they are connected to the subsequent process section through the dry filter output pipeline 66.

[0078] The main stem filter 5 comprises a main structure body 51, a main internal filler 52, a second main valve 53, a second main collecting box 54, a main outlet valve 55 and a main inlet valve 56. The main internal filler 52 is arranged inside the main structure body 51. The main outlet valve 55 is arranged at the outlet of the main stem filter 5, and the main inlet valve 56 is arranged at the inlet of the main stem filter 5.

[0079] The main structure body 51 is made of carbon steel or stainless steel, the internal flow rate is set to 0.1-1 m / s, and the volume is designed according to the flow rate and gas volume. The main internal filler 52 is a material with adsorption function (for example, a porous material of the iron oxide series), which adsorbs tar, moisture and impurities in the pyrolysis gas; the main internal filler 52 needs to be replaced after adsorption saturation to ensure the efficiency of filtration. After the main internal filler 52 is saturated, the second main valve 53 is opened to discharge the tar to the second main collection box 54. The pyrolysis gas after three-stage filtration passes through the main outlet valve 55 and the dry filter output pipeline 66 to the next section.

[0080] The slave dry filter 6 includes a slave structural body 61, a slave internal filler 62, a second slave valve 63, a second slave collecting box 64, a slave outlet valve 65 and a slave inlet valve 67. The slave internal filler 62 is arranged inside the slave structural body 61. The slave outlet valve 65 is arranged at the outlet of the slave dry filter 6, and the slave inlet valve 67 is arranged at the inlet of the slave dry filter 5.

[0081] The main body 61 of the slave structure is made of carbon steel or stainless steel, the internal flow rate is set to 0.1-1 m / s, and the volume is designed according to the flow rate and gas volume. The internal filler 62 is a material with adsorption function, which adsorbs tar, moisture and impurities in the pyrolysis gas; after the internal filler 62 is saturated with adsorption, it needs to be replaced to ensure the efficiency of filtration. After the internal filler 62 is saturated, the second slave valve 63 is opened to discharge the tar to the second slave collection box 64. The pyrolysis gas after three-stage filtration passes through the outlet valve 65 and the dry filter pipeline 66 to the next section.

[0082] The switching between the main dry filter 5 and the slave dry filter 6 is achieved by opening and closing the front end valves (the main inlet valve 56 and the slave inlet valve 67).

[0083] The pyrolysis gas that has undergone three-stage purification is pressurized by the booster fan 7 and then enters the flame arrester 8.

[0084] A flame arrester 8 is designed behind the booster fan 7 to prevent flame propagation by lowering the temperature required for combustion and reducing the number of free radicals, thereby ensuring safety.

[0085] After three-stage filtration, the pyrolysis gas index meets the requirements for entering the generator, and then passes through the booster fan 7 and the flame arrester 8 in sequence before entering the generator system 9. The power generation system 9 includes, for example, an engine, a generator, a lubrication system, a cooling system, a control component, and a muffler. The purified pyrolysis gas enters the power generation system, ignites, burns, expands, and does work, pushing the cylinders in the engine to move up and down. The movement of multiple cylinders causes the crankshaft to rotate, and the rotation drives the rotation of the generator rotor. Using the principle of electromagnetic induction, the generator outputs an induced electromotive force, which generates current through the load.

[0086] The system is relatively simple and has a good effect on reducing, harmlessly treating and recycling domestic waste. The calorific value of domestic waste can be effectively utilized, and green electricity can be exported to store electricity and charge new energy vehicles, which is beneficial to the country's carbon emission reduction. It has important practical application value.

[0087] The series-parallel switching of the main high-voltage electric filter system 2 and the slave high-voltage electric filter system 3 can ensure the efficient and continuous operation of the system and improve reliability. The parallel design of the main dry filter 5 and the slave dry filter 6 improves the continuity of system operation. The use of dry filters makes the internal filler replacement easy and also ensures the continuous operation of the system.

[0088] The various embodiments of the present invention are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0089] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A domestic waste pyrolysis gas purification power generation system, characterized in that: include: A physical filtration system configured to perform a first stage filtration of the pyrolysis gas of domestic waste by settling tar and impurities in the pyrolysis gas of domestic waste by relying on gravity and a change in the direction of movement; The main high-voltage electric filtration system and the slave high-voltage electric filtration system are both configured to perform second-stage filtration on the pyrolysis gas of domestic waste by relying on direct current high-voltage electricity, and both can be controlled to be in an offline state or an online state; A switching pipeline system configured to switch the series-parallel relationship between the main high-voltage electric filter system and the slave high-voltage electric filter system; The main dry filter and the secondary dry filter are connected in parallel and can be controlled to be in an offline state or an online state. Both rely on replaceable internal fillers to absorb tar, impurities, sulfides and moisture, thereby performing a third-level filtration of the pyrolysis gas of domestic waste; The power generation system is configured to receive the pyrolysis gas of domestic waste after three-stage filtration and burn it to generate electricity.

2. The domestic waste pyrolysis gas purification power generation system according to claim 1 is characterized in that: The physical filtration system includes two branch pipelines, a first branch valve and a second branch valve respectively arranged on the two branch pipelines; The main high-voltage electric filtration system includes: a main high-voltage generator, a main mechanical tower body, a first main valve, a first main collecting box, a main circulating water pump, two main circulating water valves, a main circulating water pipeline, a main gas outlet valve, a main gas outlet pipeline, and an anode plate and a cathode plate located inside the main mechanical tower body and facing each other; The bottom of the main mechanical tower is connected to the outlet of the physical filtration system through a branch pipeline; The main high voltage generator is configured to generate a DC high voltage electric field between a cathode plate and an anode plate within the main mechanical tower body; The first main valve is configured to control the connection and disconnection between the bottom of the main mechanical tower and the first main collecting box; The first end of the main circulating water pipeline is connected to the bottom of the main mechanical tower body, and the second end of the main circulating water pipeline is connected to the top of the main mechanical tower body. The main circulating water pump is arranged on the main circulating water pipeline, and is used to pump the flushing liquid accumulated at the bottom of the main mechanical tower body to the top of the main mechanical tower body to flush the cathode plate and the anode plate. Two main circulating water valves are arranged at the front and rear ends of the main circulating water pump; The first end of the main gas outlet pipeline is connected to the top outlet of the main mechanical tower body, the second end of the main gas outlet pipeline is connected to the inlets of the main dry filter and the secondary dry filter, and the main gas outlet valve is arranged on the main gas outlet pipeline; The secondary high-voltage electric filtration system comprises: a secondary high-voltage generator, a secondary mechanical tower body, a first secondary valve, a first secondary collecting box, a secondary circulating water pump, two secondary circulating water valves, a secondary circulating water pipeline, a secondary gas outlet valve, a secondary gas outlet pipeline, and an anode plate and a cathode plate located inside the secondary mechanical tower body and opposite to each other; The outlet of the physical filtration system is connected from the bottom of the mechanical tower body through another branch pipeline; The slave high voltage generator is configured to generate a DC high voltage electric field between a cathode plate and an anode plate within the slave mechanical tower body; The first slave valve is configured to control the connection and disconnection between the bottom of the slave mechanical tower body and the first slave collection box; The first end of the slave circulating water pipeline is connected to the bottom of the slave mechanical tower body, and the second end of the slave circulating water pipeline is connected to the top of the slave mechanical tower body. The slave circulating water pump is arranged on the slave circulating water pipeline, and is used to pump the flushing liquid accumulated at the bottom of the slave mechanical tower body to the top of the slave mechanical tower body to flush the cathode plate and the anode plate. Two slave circulating water valves are arranged at the front and rear ends of the slave circulating water pump; A first end of the secondary gas outlet pipeline is connected to the top outlet of the secondary mechanical tower body, a second end of the secondary gas outlet pipeline is connected to the inlets of the main dry filter and the secondary dry filter, and a secondary gas outlet valve is arranged on the secondary gas outlet pipeline; The switching pipeline system is connected between the top outlet of the slave machinery tower body and the bottom inlet of the main machinery tower body or between the top outlet of the main machinery tower body and the bottom inlet of the slave machinery tower body.

3. The domestic waste pyrolysis gas purification power generation system according to claim 1 is characterized in that: The main stem filter includes a main structural body, a main internal filler, a second main valve, a second main collection box, a main outlet valve, and a main inlet valve; The main internal filler is arranged inside the main structure body, the second main valve is used to control the on-off between the bottom of the main structure body and the second main collecting box, the main inlet valve is arranged on the inlet pipeline of the main structure body, and the main outlet valve is arranged on the outlet pipeline of the main structure body; The secondary dry filter comprises a secondary structural body, secondary internal fillers, a second secondary valve, a second secondary collection box, a secondary outlet valve, and a secondary inlet valve; The internal filler is arranged inside the slave structure body, the second slave valve is used to control the on-off between the bottom of the slave structure body and the second slave collection box, the slave inlet valve is arranged on the inlet pipeline of the slave structure body, and the slave outlet valve is arranged on the outlet pipeline of the slave structure body.

4. The domestic waste pyrolysis gas purification power generation system according to claim 1 is characterized in that: It also includes a booster fan and a flame arrester. The booster fan is used to pressurize the exhaust gases of the main dry filter and the secondary dry filter, and the flame arrester is used to block the flame from being transmitted from the power generation system to the booster fan.

5. The domestic waste pyrolysis gas purification power generation system according to claim 1 is characterized in that: The physical filtration system includes a filter body, a body valve, a primary collection box, an emergency valve, a first branch valve, a second branch valve, a main line, an emergency discharge line, and a branch line; The body valve is arranged between the bottom of the filter body and the primary collection box; The emergency discharge pipeline is connected between the outlet of the filter body and the atmosphere, and the emergency valve is arranged on the emergency discharge pipeline; The first end of the main pipeline is connected to the outlet of the filter body, and the second end of the main pipeline is simultaneously connected to the first ends of the two branch pipelines; The first branch valve and the second branch valve are respectively arranged on two branch pipelines, and the second ends of the two branch pipelines are respectively connected to the main high-voltage electric filtering system and the slave high-voltage electric filtering system.

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