Branch chamber header system SCR catalyst thermal regeneration system suitable for waste incineration

Abstract

An SCR (selective catalytic reduction) catalyst thermal regeneration system suitable for waste incineration and provided with a branch bin header pipe comprises a regeneration furnace, an exhaust header pipe, an exhaust flue and a semi-dry method reaction tower, and the regeneration furnace comprises a plurality of single catalyst regeneration bins connected in sequence and heat preservation partition plates arranged between the adjacent bins. Each catalyst regeneration chamber comprises a furnace door, an air inlet, an air outlet, a circulating fan, a chamber shell, a chamber inner cavity, a hot flue gas duct, a heating pipe, a catalyst module, a track and a catalyst belt wheel frame trolley. According to the utility model, the header pipe bedroom regeneration system capable of being divided into the bins is adopted, so that the flow field and the temperature in the bins are more uniform, the catalyst can be uniformly heated, the regeneration effect of the catalyst is ensured, the energy consumption is reduced, the catalyst is more convenient to load and unload, and the safety is improved; the exhaust ports of all the chambers are connected through the header pipe, when the number of the catalyst regeneration modules is changed, the number of the chambers put into use can be flexibly changed by adjusting opening and closing of the exhaust ports of all the chambers, and the operation cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of waste incineration, and specifically relates to a compartment-based mother pipe SCR catalyst thermal regeneration system suitable for waste incineration. Background Art

[0002] As the flue gas emission standards of the waste incineration industry become increasingly stringent, the requirements for nitrogen oxide emission indicators are also becoming more and more stringent. If the NOx concentration is stably controlled to reach 80 mg / Nm 3 or 50 mg / Nm 3 Below, SCR is the most reliable technology at present. As the core of SCR technology, catalyst plays a decisive role in the investment and operation cost and operation stability of SCR technology. SCR catalyst can accelerate the reaction rate and improve the selectivity of the reaction in chemical reactions. However, as the use time increases, the catalyst may be affected by dust erosion, poisoning and other reasons to affect its activity and selectivity, leading to deactivation.

[0003] In the waste incineration industry, low-temperature catalysts are usually used and arranged behind the bag filter. The operating temperature is about 170-230°C. In this temperature range, NH3 in the flue gas can easily react with SO2 and SO3 in the flue gas to form ammonium bisulfate and ammonium bisulfite, which adhere to the catalyst surface, block the pore structure of the catalyst, and cover the surface active sites, thereby causing the catalyst to deactivate.

[0004] The Chinese invention patent application with publication number CN 113503735 A discloses an SCR catalyst regeneration device, which utilizes the SCR catalyst dust removal room and trolley regeneration furnace technology. The catalyst is fed into the regeneration furnace through a trolley, and an air inlet and an air outlet are arranged in the regeneration furnace. The trolley regeneration furnace used in the patent application cannot be completely sealed. At the same time, when there are many catalyst modules and the equipment size is large, the internal flow field is uneven and the regeneration effect is poor.

[0005] The Chinese utility model patent with publication number CN 207856938 U discloses an in-situ regeneration device for SCR catalyst used in the incineration of domestic waste. The patent discloses an in-situ regeneration device, which uses hot flue gas generated by biogas combustion as regeneration flue gas. At the same time, the SCR system needs to be bypassed, which is essentially different from the offline regeneration system of this patent and does not have the compartment and main pipe exhaust technology required by this patent.

[0006] The Chinese invention patent application with publication number CN 114849793 A discloses an offline regeneration device for SCR catalyst regeneration, which is a vertical regeneration device. A multi-layer grid is arranged in the reactor for placing the catalyst. The catalyst needs to be lifted or hoisted to a certain height when placed into the reactor, which is difficult to operate and has low safety. On the other hand, the overall size of the equipment is large, and it is difficult to ensure the uniformity of the internal flow field during the regeneration process.

[0007] The Chinese utility model patent with publication number CN 202008275 U discloses an environmentally friendly denitration catalyst tunnel furnace drying device, which solves the problem of large temperature difference and uneven dehydration of the catalyst layer by adopting a segmented structure and cross-arranged circulating fans, and is used for drying catalysts. On the one hand, the patent adopts a segmented structure mainly to better control the temperature and humidity of the material layer in each zone, and on the other hand, the cross-arranged circulating fans can make the left and right sides of the material layer cross-heated, so as to achieve uniform heating on both sides.

[0008] On this basis, the present invention proposes a chamber-based mother-pipe SCR catalyst thermal regeneration system suitable for waste incineration. Utility Model Content

[0009] Technical problems to be solved: In view of the problems in the prior art that the catalyst of the traditional vertical regeneration equipment is difficult to hoist and has potential safety hazards, and the problems that the internal flow field of the traditional bedroom regeneration is uneven, the regeneration effect is poor, and the energy consumption is high, this new type proposes a compartment-divided mother pipe SCR catalyst thermal regeneration system suitable for waste incineration. By heating the circulating air, the ammonium sulfate salt attached to the surface of the catalyst is decomposed into SO2 and HCl and discharged with the exhaust air, thereby achieving the purpose of catalyst regeneration. The mother pipe bedroom regeneration system with divisible compartments is adopted. The flow field and temperature in the compartment are more uniform, which can ensure that the catalyst is heated evenly and the decomposition of the ammonium sulfate salt is more thorough, improve the regeneration effect of the catalyst, and reduce energy consumption; the loading and unloading of the catalyst is more convenient and the safety is improved; in addition, the exhaust ports of each compartment are connected through the mother pipe. When the number of catalyst regeneration modules changes, the number of compartments put into use can be flexibly changed by adjusting the opening and closing of the exhaust ports of each compartment, thereby reducing the operating cost.

[0010] Technical solution: A chamber-type mother pipe SCR catalyst thermal regeneration system suitable for waste incineration, including a regeneration furnace, an exhaust mother pipe, an exhaust flue and a semi-dry reaction tower.

[0011] The regeneration furnace comprises a plurality of single catalyst regeneration chambers connected in sequence and a heat-insulating partition arranged between adjacent single catalyst regeneration chambers. The single catalyst regeneration chamber comprises a furnace door, an air inlet, an air outlet, a circulating fan, a chamber shell, a chamber inner cavity, a hot flue gas duct, a heating pipe, a catalyst module, a track, and a catalyst wheeled frame trolley. The hot flue gas duct is arranged between the chamber shell and the chamber inner cavity. The bottom of the chamber inner cavity is open and serves as a bottom duct. The furnace door is arranged on one side of the chamber shell. The air inlet is arranged on the side of the chamber shell opposite to the furnace door. The air outlet is directly opened to the top of the chamber inner cavity and the side away from the air inlet. The heating pipe is arranged in the hot flue gas duct. The circulating fan is arranged in the hot flue gas duct and on the inner side of the top of the chamber shell. The catalyst module is a catalyst to be regenerated, which is placed on the catalyst wheeled frame trolley. The catalyst wheeled frame trolley is a frame trolley with wheels at the bottom. A track is arranged at the bottom of the chamber inner cavity for fixing and placing the catalyst wheeled frame trolley.

[0012] One side of the exhaust main pipe is connected to the outlet pipes in several single catalyst regeneration chambers connected in sequence, and the other side is connected to the air inlet pipe of the exhaust flue. The air outlet of the exhaust flue is connected to a semi-dry reaction tower, and the exhaust gas containing pollutants is treated by the semi-dry reaction tower.

[0013] Preferably, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a switch regulating valve, and the switch regulating valve is arranged on the pipeline connecting the exhaust main pipe and the air outlet.

[0014] Preferably, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes an exhaust fan, the air inlet of the exhaust fan is connected to the exhaust main pipe, and the air outlet is connected to the air inlet pipe of the exhaust flue.

[0015] Preferably, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a detection port, which is arranged on a pipe connecting the exhaust fan and the exhaust main pipe.

[0016] Preferably, the chamber master-pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a temperature sensor, which is arranged in the hot flue gas duct and is used to monitor the temperature in the hot flue gas duct.

[0017] Preferably, the single catalyst regeneration chamber further comprises a heat-insulating layer, and the heat-insulating layer is arranged on the inner side of the chamber outer shell.

[0018] Beneficial effects: Under existing technologies, online regeneration requires consumption of steam or natural gas, and the regeneration process requires the SCR to be bypassed or put into use only when the furnace is shut down; the offline vertical regenerated catalyst needs to be lifted or hoisted to a certain height when loaded into the regeneration furnace, which is difficult to operate and poses a safety hazard. At the same time, the uniformity of the reactor flow field is difficult to ensure; horizontal offline regeneration mostly adopts a trolley design, which cannot be completely sealed; and when the number of regenerated catalyst modules is large and the equipment size is large, the overall heating uniformity is poor, the regeneration effect cannot be guaranteed, and the system energy consumption is high.

[0019] The utility model proposes a horizontal SCR catalyst regeneration system with a main pipe having a divided chamber, which can achieve:

[0020] The main pipe chamber regeneration system with divisible chambers is adopted. The flow field and temperature in the chamber are more uniform, which can ensure that the catalyst is heated evenly, ensure the regeneration effect of the catalyst, and reduce energy consumption;

[0021] The loading and unloading of catalyst is more convenient and safer;

[0022] The exhaust ports of each chamber are connected through a main pipe. When the number of catalyst regeneration modules changes, the number of chambers put into use can be flexibly changed by adjusting the opening and closing of the exhaust ports of each chamber, thereby reducing operating costs.

[0023] Compared with CN 113503735 A (an SCR catalyst regeneration device), this new device requires the use of a sub-chamber and main pipe exhaust method. The catalyst is directly sent to the regeneration furnace by a forklift without a trolley, which ensures the sealing of the equipment. At the same time, the structure of the sub-chamber can ensure the uniformity of the internal flow field, and the hot air passes through the catalyst pores evenly to ensure the regeneration effect.

[0024] Compared with CN 207856938 U (an in-situ regeneration device for SCR catalyst used in the incineration of domestic waste), the offline regeneration system of the present invention is essentially different from it. This technology only uses the hot flue gas generated by the combustion of biogas as the regeneration flue gas, and the SCR system needs to be bypassed. It does not have the sub-chamber and main pipe exhaust technology requested for protection by the present invention.

[0025] Compared with CN 114849793 A (an off-line regeneration device for SCR catalyst regeneration), a multi-layer grid is arranged in the reactor for placing the catalyst. The catalyst needs to be lifted or hoisted to a certain height when placed into the reactor, which makes the operation difficult and unsafe. On the other hand, the overall size of the equipment is large, and the uniformity of the internal flow field is difficult to ensure during the regeneration process. The present invention avoids these two problems.

[0026] Compared with CN 202008275 U (an environmentally friendly denitration catalyst tunnel furnace drying device), it realizes partitioning by setting stainless steel baffles and kiln doors. While better controlling temperature and humidity, it also brings obstacles to the advancement of the kiln car. The patent does not provide detailed descriptions of the advancement of the kiln car and materials (catalysts) in the tunnel kiln after partitioning. The main purpose of this new type is the regeneration of the catalyst, which has higher requirements for temperature, flow field and decomposition of ammonium sulfate salts; by dividing the chambers, while achieving uniform temperature and flow, the way the catalyst enters the regeneration furnace is also more convenient and safe. At the same time, this patent uses natural gas as energy, and uses the hot flue gas after combustion of an external natural gas burner as the drying gas. The temperature of the hot flue gas is difficult to control; this patent uses a built-in heating tube as a heat source, which saves space compared to a large burner, and at the same time, the temperature control is more precise.

[0027] In summary, the utility model solves the problems of difficult catalyst hoisting and potential safety hazards in traditional vertical regeneration equipment and the problems of uneven internal flow field, poor regeneration effect and high energy consumption in traditional bedroom regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the new type of SCR catalyst thermal regeneration system with compartment master pipes suitable for waste incineration;

[0029] Figure 2 for Figure 1 A cross-sectional view of a single catalyst regeneration chamber framed by a dotted line.

[0030] The numbers in the figure represent the following: 1. Regeneration furnace; 2. Furnace door; 3. Air inlet; 4. Air outlet; 5. Circulation fan; 6. Switch regulating valve; 7. Exhaust main pipe; 8. Detection port; 9. Exhaust fan; 10. Exhaust flue; 11. Semi-dry reaction tower; 12. Single catalyst regeneration chamber; 13. Insulation partition; 14. Insulation layer; 15. Heating pipe; 16. Hot flue gas duct; 17. Chamber inner cavity; 18. Temperature sensor; 19. Catalyst module; 20. Track; 21. Catalyst wheeled frame trolley. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Glossary:

[0033] SCR: Selective Catalytic reduction, that is, selective catalytic reduction technology, refers to the use of reducing agents such as NH3 to reduce NO in flue gas to N2 and water under the action of catalysts in the presence of O2. The catalyst is the core of this technology.

[0034] Catalyst regeneration: After a certain period of use, the catalyst will become deactivated. The catalyst is treated by heating, chemical cleaning, physical cleaning, surface immersion spraying, etc. to restore its catalytic activity.

[0035] Thermal regeneration of SCR catalyst for municipal solid waste incineration: The main reason for the failure of SCR catalyst for municipal solid waste incineration is the deposition of ammonium sulfate. By heating the catalyst, the ammonium sulfate deposited on its surface can be decomposed to clean the catalyst surface and restore its catalytic activity.

[0036] This patent discloses a horizontal SCR catalyst regeneration system with a chamber, which includes a regeneration furnace 1, an exhaust main pipe 7, an exhaust flue 10 and a semi-dry reaction tower 11.

[0037] The regeneration furnace 1 includes a plurality of sequentially connected single catalyst regeneration chambers 12 and a heat-insulating partition 13 arranged between adjacent single catalyst regeneration chambers 12. The single catalyst regeneration chamber 12 includes a furnace door 2, an air inlet 3, an air outlet 4, a circulating fan 5, a chamber shell, a chamber interior 17, a hot flue gas duct 16, a heating pipe 15, a catalyst module 19, a track 20, and a catalyst wheeled frame trolley 21. The hot flue gas duct 16 is arranged between the chamber shell and the chamber interior 17. The bottom of the chamber interior 17 is open as a bottom duct. The furnace door 2 is arranged at On one side of the chamber shell, the air inlet 3 is arranged on the side of the chamber shell opposite to the furnace door 2, the air outlet 4 is directly opened to the top of the chamber inner cavity 17, away from the side of the air inlet 3, the heating pipe 15 is arranged in the hot flue gas duct 16, the circulating fan 5 is arranged in the hot flue gas duct 16 and on the inner side of the top of the chamber shell, the catalyst module 19 is the catalyst to be regenerated, which is placed on the catalyst wheeled frame trolley 21, the catalyst wheeled frame trolley 21 is a frame trolley with wheels at the bottom, and a track 20 is provided at the bottom of the chamber inner cavity 17 for fixing and placing the catalyst wheeled frame trolley 21.

[0038] One side of the exhaust main pipe 7 is connected to the air outlet pipes 4 in several single catalyst regeneration chambers 12 connected in sequence, and the other side is connected to the air inlet pipe of the exhaust flue 10. The air outlet of the exhaust flue 10 is connected to the semi-dry reaction tower 11, and the exhaust gas containing pollutants is treated by the semi-dry reaction tower 11.

[0039] Furthermore, as a further preferred embodiment of the present invention, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a switch regulating valve 6, and the switch regulating valve 6 is arranged on the pipeline connecting the exhaust main pipe 7 and the air outlet 4.

[0040] Furthermore, as a further preferred embodiment of the present invention, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes an exhaust fan 9, the air inlet of the exhaust fan 9 is connected to the exhaust main pipe 7 pipeline, and the air outlet is connected to the air inlet pipeline of the exhaust flue 10.

[0041] Furthermore, as a further preferred embodiment of the present invention, the chamber main pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a detection port 8, and the detection port 8 is arranged on the pipe connecting the exhaust fan 9 and the exhaust main pipe 7.

[0042] Furthermore, as a further preferred embodiment of the present invention, the sub-chamber mother-pipe SCR catalyst thermal regeneration system suitable for waste incineration also includes a temperature sensor 18, and the temperature sensor 18 is arranged in the hot flue gas duct 16 to monitor the temperature in the hot flue gas duct 16.

[0043] Furthermore, as a further preferred embodiment of the present invention, the single catalyst regeneration chamber 12 further includes a heat-insulating layer 14, and the heat-insulating layer 14 is arranged on the inner side of the chamber shell. Example 1

[0044] A compartment-based SCR catalyst thermal regeneration system suitable for waste incineration, see Figure 1 , including a regeneration furnace 1, an exhaust main pipe 7, a switch regulating valve 6, a detection port 8, an exhaust fan 9, an exhaust flue 10, a temperature sensor 18 and a semi-dry reaction tower 11.

[0045] The regeneration furnace 1 comprises four sequentially connected single catalyst regeneration chambers 12 and a heat-insulating partition 13 disposed between adjacent single catalyst regeneration chambers 12. Figure 2 A single catalyst regeneration chamber 12 includes a furnace door 2, an air inlet 3, an air outlet 4, a circulating fan 5, a chamber shell, a chamber inner cavity 17, a hot flue gas duct 16, an insulation layer 14, a heating tube 15, a catalyst module 19, a track 20, and a catalyst wheeled frame trolley 21.

[0046] The catalyst module 19 is the catalyst to be regenerated, which is placed on a catalyst wheeled frame trolley 21. The catalyst wheeled frame trolley 21 is a frame trolley with wheels at the bottom (the wheeled trolley frame structure can realize the diversion of the bottom of the catalyst, so that the hot flue gas enters the catalyst pores from the bottom of the catalyst, and better realizes mass transfer and heat transfer). A track 20 is provided at the bottom of the chamber inner cavity 17 for fixing and placing the catalyst wheeled frame trolley 21.

[0047] The chamber inner cavity 17 is arranged inside the chamber shell and has a passage with the chamber shell (the chamber inner cavity 17 and the chamber shell are both rectangular cavities with one side open and the rest closed, and the open side is used to install the furnace door 2), the furnace door 2 is arranged on one side of the chamber shell, the air inlet 3 is arranged on the side of the chamber shell opposite to the furnace door 2, the air outlet 4 is directly opened to the top of the chamber inner cavity 17, away from the air inlet 3, the hot flue gas duct 16 is arranged between the chamber shell (including the insulation layer) and the chamber inner cavity 17, and the bottom of the chamber inner cavity 17 is open, as a bottom duct, so that the airflow flows into the chamber inner cavity 17 from the bottom of the chamber inner cavity 17 along the hot flue gas duct 16. In order to ensure the stability of the overall structure, the chamber inner cavity 17 and the chamber shell are fixed by welding through supporting components. The heating pipe 15 is arranged in the hot flue gas duct 16 (in this embodiment, the heating pipe 15 is arranged on both sides of the chamber inner cavity 17. In this embodiment, the heating pipe is an electric heating pipe, which is heated by an electric heater). The cold air enters the hot flue gas duct 16 from the air inlet 3 and is heated to a specified temperature by the heating pipes 15 on both sides. The heated hot regenerated flue gas flows into the chamber inner cavity 17 from the bottom duct outlet, enters the catalyst channel from the bottom end of the catalyst module 19, and then flows out from the upper end surface of the catalyst.

[0048] The circulating fan 5 is arranged in the hot flue gas duct 16 and the inner side of the top of the chamber shell (in this embodiment, a circulating fan 5 is arranged in a single catalyst regeneration chamber 12, Figure 1 Due to the size of the figure, only one is drawn). The flue gas flowing out of the catalyst duct enters the air ducts on both sides of the chamber again through the circulating fan for heating, thereby realizing the heating cycle of the regenerated flue gas in the chamber. The thermal insulation layer 14 is arranged on the inner side of the chamber shell.

[0049] One side of the exhaust main pipe 7 is connected to the air outlet pipes 4 in four single catalyst regeneration chambers 12 connected in sequence, and the other side is connected to the air inlet pipe of the exhaust flue 10. The air outlet of the exhaust flue 10 is connected to the semi-dry reaction tower 11, and the exhaust gas containing pollutants is treated by the semi-dry reaction tower 11.

[0050] The switch regulating valve 6 is arranged on the pipeline connecting the exhaust main pipe 7 and the air outlet 4, and is used to control the emission of regeneration flue gas containing SO2 and NH3 in each chamber.

[0051] The detection port 8 is arranged on the pipeline connecting the exhaust fan 9 and the exhaust main pipe 7, and is used to detect the concentration of NH3 and SO2 in the regeneration exhaust gas.

[0052] The air inlet of the exhaust fan 9 is connected to the exhaust main pipe 7, and the air outlet is connected to the air inlet pipe of the exhaust flue 10. The exhaust fan 9 is used to discharge the exhaust gas into the exhaust flue 10. The exhaust fan 9 can be frequency-controlled to adjust different exhaust volumes.

[0053] The temperature sensor 18 is disposed in the hot flue gas duct 16 to monitor the temperature in the hot flue gas duct 16 .

[0054] The above-mentioned compartment master pipe SCR catalyst thermal regeneration system suitable for waste incineration is used as follows:

[0055] ① First, use a forklift to lift the catalyst module 19 and place it on the catalyst wheeled frame trolley 21. Then use a forklift to lift the catalyst module 19 and the catalyst wheeled frame trolley 21 together and transport them to the chamber furnace door 2. Put the wheels of the trolley on the track 20 and push and fix them in the required position through the track 20. After all catalysts are in place, close the furnace door 2.

[0056] ② Regeneration reactor heating stage (room temperature to 300°C): Turn on the electric heater, and the heating pipes 15 around the box start to work, heating the catalyst module 19 and the gas in the box from room temperature to 300°C. The heating process takes about 5-6 hours. During the heating process, the circulation fan 5 is turned on to speed up the gas flow and temperature uniformity in the chamber. During this heating process, the exhaust fan 9 is turned off and the switch regulating valve 6 is closed.

[0057] ③ Heating stage of regeneration reactor (300℃ to 400℃): above 300℃, ammonium sulfate salt begins to decompose in large quantities. At this time, the electric heater is turned on, the switch regulating valve 6 on the flue of the air outlet 4 is turned on, and the exhaust fan 9 is turned on. The flow rate of the exhaust fan 9 is set to about 1 / 5-1 / 2 of the rated flow rate. At this time, clean air at room temperature enters the air duct of the chamber at the air inlet 3, and flows into the chamber cavity 17 from the bottom air duct after being heated by the heating pipe 15 in the chamber, and circulates in the chamber through the catalyst pores and under the action of the circulating fan 5, so that the temperature of the gas in the chamber and the catalyst module 19 steadily rises to about 400℃. After the exhaust gas containing SO2 and NH3 in each chamber is merged into the exhaust main pipe 7 from the air outlet 4, it is sent to the semi-dry reaction tower 11 through the exhaust flue 10 under the action of the exhaust fan 9 for tail gas treatment. This heating process takes about 5-6 hours.

[0058] ④ Regeneration and decomposition stage (temperature stabilized at 380℃-400℃): When the overall temperature of the regeneration reactor reaches about 400℃, ammonium sulfate continues to decompose in large quantities. At this time, the switch regulating valve 6 is fully opened, the exhaust fan 9 exhaust volume is opened to reach the rated value, and the heating power is controlled to keep the temperature not lower than 380℃. Clean air at room temperature enters the air duct of the chamber at the air inlet 3, and flows into the chamber cavity 17 from the bottom air duct after being heated by the heating pipe 15 in the chamber, and circulates in the chamber through the catalyst pores and under the action of the circulating fan 5, so that the temperature of the gas in the chamber and the catalyst module 19 is maintained at about 400℃. After the exhaust gas containing SO2 and NH3 in each chamber is merged into the exhaust main pipe 7 from the air outlet 4, it is sent to the semi-dry reaction tower 11 through the exhaust flue 10 under the action of the exhaust fan 9 for tail gas treatment. The concentration of SO2 and NH3 in the exhaust gas is detected through the detection port, and the regeneration and decomposition process ends when its content reaches the standard.

[0059] ⑤ Cooling stage: turn off the heater, keep the circulation fan 5 and exhaust fan 9 turned on, and keep the exhaust air volume unchanged, so that the overall temperature of the regeneration reaction furnace steadily decreases. When the overall temperature of the regeneration furnace 1 drops to about 100°C, turn off the exhaust fan 9 and cool naturally. After cooling to room temperature, the catalyst wheeled frame trolley 21 and the catalyst module 19 are transported out together by a forklift, and the entire regeneration process is completed.

[0060] When the number of regenerated catalyst modules changes, the above-mentioned implementation steps are maintained for the chamber put into use, and the exhaust volume is adjusted by the exhaust fan 9. The heating pipe 15, the circulating fan 5, and the switch regulating valve 6 of the chamber do not need to be closed to realize the flexible use of the chamber.

Claims

1. A chamber-based SCR catalyst thermal regeneration system suitable for waste incineration, characterized in that: It comprises a regeneration furnace (1), an exhaust main pipe (7), an exhaust flue (10) and a semi-dry reaction tower (11), The regeneration furnace (1) comprises a plurality of sequentially connected single catalyst regeneration chambers (12) and a heat-insulating partition (13) arranged between adjacent single catalyst regeneration chambers (12); the single catalyst regeneration chamber (12) comprises a furnace door (2), an air inlet (3), an air outlet (4), a circulating fan (5), a chamber shell, a chamber inner cavity (17), a hot flue gas duct (16), a heating pipe (15), a catalyst module (19), a track (20), and a catalyst wheeled frame trolley (21); the hot flue gas duct (16) is arranged between the chamber shell and the chamber inner cavity (17); the chamber inner cavity (17) has an opening at the bottom as a bottom duct; the furnace door ( 2) is arranged on one side of the chamber shell, the air inlet (3) is arranged on the side of the chamber shell opposite to the furnace door (2), the air outlet (4) is directly opened to the top of the chamber inner cavity (17) and the side away from the air inlet (3), the heating pipe (15) is arranged in the hot flue gas duct (16), the circulating fan (5) is arranged in the hot flue gas duct (16) and the inner side of the top of the chamber shell, the catalyst module (19) is a catalyst to be regenerated, which is placed on a catalyst wheeled frame trolley (21), the catalyst wheeled frame trolley (21) is a frame trolley with wheels at the bottom, and a track (20) is provided at the bottom of the chamber inner cavity (17) for fixing and placing the catalyst wheeled frame trolley (21); One side of the exhaust main pipe (7) is connected to the air outlet pipes (4) in a plurality of sequentially connected single catalyst regeneration chambers (12), and the other side is connected to the air inlet pipe of the exhaust flue (10). The air outlet of the exhaust flue (10) is connected to the semi-dry reaction tower (11), and the exhaust gas containing pollutants is treated by the semi-dry reaction tower (11).

2. The SCR catalyst thermal regeneration system with compartment master pipe suitable for waste incineration according to claim 1 is characterized in that: The compartment main pipe SCR catalyst thermal regeneration system suitable for waste incineration further comprises an on-off regulating valve (6), wherein the on-off regulating valve (6) is arranged on a pipeline connecting the exhaust main pipe (7) and the air outlet (4).

3. The SCR catalyst thermal regeneration system with compartment master pipe suitable for waste incineration according to claim 1 is characterized in that: The chamber-based main pipe SCR catalyst thermal regeneration system suitable for waste incineration further comprises an exhaust fan (9), wherein the air inlet of the exhaust fan (9) is connected to the exhaust main pipe (7) pipeline, and the air outlet is connected to the air inlet pipeline of the exhaust flue (10).

4. The SCR catalyst thermal regeneration system with compartment master pipes suitable for waste incineration according to claim 3 is characterized in that: The compartment main pipe SCR catalyst thermal regeneration system suitable for waste incineration further comprises a detection port (8), wherein the detection port (8) is arranged on a pipe connecting the exhaust fan (9) and the exhaust main pipe (7).

5. The SCR catalyst thermal regeneration system with compartment master pipes suitable for waste incineration according to claim 1 is characterized in that: The compartment master-pipe SCR catalyst thermal regeneration system suitable for waste incineration further comprises a temperature sensor (18), wherein the temperature sensor (18) is arranged in the hot flue gas duct (16) and is used to monitor the temperature in the hot flue gas duct (16).

6. The SCR catalyst thermal regeneration system with compartment master pipes suitable for waste incineration according to claim 1 is characterized in that: The single catalyst regeneration chamber (12) further comprises a heat-insulating layer (14), wherein the heat-insulating layer (14) is arranged on the inner side of the chamber shell.

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