A carbon cleaning device based on NTP technology combined with dry ice preparation device and control method

Abstract

This invention discloses a carbon removal device and control method based on NTP technology combined with a dry ice generator. The dual DPF device has an NTP generator and a dry ice generator connected to its two ends, respectively. The NTP generator and the dry ice generator are interconnected. A pipe connecting the NTP generator and the dual DPF device is connected to an air supply fan. The NTP generator is connected to a water tank and an oxygen generator. The dry ice generator is connected to a dry ice storage tank. One end of the dry ice generator is connected to a bidirectional air pump, and the other end of the bidirectional air pump is connected to the pipe connecting the NTP generator and the dual DPF device. The dual DPF device, NTP generator, dry ice generator, air supply fan, water tank, oxygen generator, and bidirectional air pump are all electrically connected to an ECU control module. This invention's DPF realizes a dual DPF regeneration process, utilizing exhaust waste heat during regeneration to produce dry ice, resulting in high economic efficiency, good practicality, energy saving, and emission reduction.

Description

Technical Field

[0001] This invention relates to the field of diesel engine aftertreatment, and in particular to a carbon removal device and control method based on NTP technology combined with a dry ice generator. Background Technology

[0002] Diesel engines are widely used in transportation and agricultural machinery due to their high thermal efficiency, fuel economy, and power performance. Compared to gasoline engines, diesel engines have a higher average air-fuel ratio, resulting in lower emissions of carbon monoxide (CO) and hydrocarbons (HC), but lower emissions of nitrogen oxides (NOx). x Emissions of CO and particulate matter (PM) are higher in diesel engines. x PM2.5 and sulfides are all harmful substances. PM2.5 is a fine particulate matter that can be suspended in the air and, under certain conditions, form smog, blocking sunlight, affecting plant growth, and posing safety hazards to transportation. Furthermore, PM2.5 can enter the lungs and bloodstream through respiration, significantly increasing the risk of respiratory diseases and even inducing cancer. Clearly, diesel engine PM2.5 endangers human health and pollutes the atmospheric environment, prompting various countries to enact strict emission regulations to restrict it. With the continuous upgrading of emission regulations, higher requirements are being placed on the design and manufacturing of diesel engine after-treatment systems.

[0003] Diesel fuel filter (DPF) is the most effective technology for reducing diesel engine emissions. Studies have shown that its capture efficiency can reach over 90%. However, during the DPF capture process, particulate matter (PM) continuously deposits in the DPF channels, easily leading to internal blockage. This can result in increased exhaust back pressure, increased fuel consumption, and deterioration of diesel engine performance. Therefore, the key to DPF technology lies in its regeneration—that is, timely removal of accumulated PM from the DPF after blockage, restoring its performance and extending its service life.

[0004] DPF regeneration methods include thermal regeneration and catalytic regeneration; traditional DPF regeneration technologies mainly employ these two approaches. Thermal regeneration technology works by heating the PM deposited within the DPF at high temperatures (>600℃) until it is burned off, thus regenerating the DPF. Methods for achieving thermal regeneration include fuel injection heating regeneration, microwave heating regeneration, and infrared heating regeneration. However, thermal regeneration requires high temperatures, and the DPF carrier can be damaged due to localized overheating. Catalytic regeneration technology can significantly reduce the onset temperature of PM oxidation, but the catalyst has a narrow temperature window for maintaining activity and requires high-quality fuel. Therefore, traditional DPF regeneration technologies have certain drawbacks and limitations in practical applications.

[0005] Non-thermal plasma (NTP) technology is a novel method for removing hazardous pollutants. It typically employs a media-barrier NTP generator, whose active substances enable previously difficult-to-achieve chemical reactions to occur under conventional conditions. NTP boasts advantages such as wide applicability, high conversion efficiency, and no secondary pollution, making it one of the most promising technologies for addressing diesel engine emissions pollution in the future. In recent years, the application of NTP in DPF regeneration has become a research hotspot. Essentially, the active substances in NTP (O3, NO2) react chemically with particulate deposits within the DPF, allowing PM to be oxidized and decomposed at low temperatures, generating CO and CO2, thus achieving DPF regeneration.

[0006] Chinese Patent Publication No. CN102678238A discloses a DPF regeneration method based on NTP technology. This invention optimizes the regeneration process by regenerating DPFs in parallel and can be extended to regenerating N DPFs in parallel at the same time. At the same time, an exhaust waste heat conduit is added to maximize the utilization of the temperature generated during the DPF regeneration process using NTP technology.

[0007] Chinese Patent Publication No. CN107747505A discloses a system and control method for regenerating a DPF using alternating engine exhaust. By setting a parallel DPF mode, exhaust gas is drawn to the front end of the regenerating DPF through a bidirectional air supply pump. The gas components in the exhaust gas and the active substances generated by the NTP generator work synergistically to regenerate the DPF. However, this patent does not utilize these exhaust temperatures under high exhaust temperature conditions, which increases energy loss.

[0008] A DPF regeneration system disclosed in Chinese Patent Publication No. CN206329368U, by setting up a dual DPF system, allows the gas after NTP regeneration of the DPF to be directly discharged through the exhaust branch, causing secondary pollution to the atmosphere.

[0009] Therefore, there is an urgent need for a fully recyclable, green, and renewable DPF device; this invention introduces a dry ice generator, which can oxidize NTP and decompose PM into CO. x A device for capturing, utilizing, and storing (CCUS). It can process CO2 gas of different concentrations to produce dry ice with higher density and purity, reducing storage costs. Summary of the Invention

[0010] The purpose of this invention is to provide a carbon removal device and control method based on NTP technology combined with a dry ice generator, so as to solve the problems existing in the prior art.

[0011] To achieve the above objectives, the present invention provides the following solution: a carbon removal device based on NTP technology combined with a dry ice generator, comprising a dual DPF device, wherein the two ends of the dual DPF device are respectively connected to an NTP generator and a dry ice generator, the NTP generator and the dry ice generator are connected to each other, a pipe connecting the NTP generator and the dual DPF device is connected to an air supply fan, the NTP generator is connected to a water tank and an oxygen generator, the dry ice generator is connected to a dry ice storage tank, one end of the dry ice generator is connected to a bidirectional air pump, the other end of the bidirectional air pump is connected to the pipe connecting the NTP generator and the dual DPF device, and the dual DPF device, the NTP generator, the dry ice generator, the air supply fan, the water tank, the oxygen generator, and the bidirectional air pump are all electrically connected to an ECU control module;

[0012] The dual DPF device includes a first heating chamber and a second heating chamber. The first heating chamber and the second heating chamber are connected to each other through a main air inlet pipe, a main air outlet pipe, and a first exhaust waste heat pipe, respectively. The main air inlet pipe is connected to the pipe connecting the NTP generator and the dual DPF device. The main air outlet pipe is connected to the dry ice generator. The air outlets of the first heating chamber and the second heating chamber are both connected to the dry ice generator. The second heating chamber is connected to the first heating chamber through a second exhaust waste heat pipe.

[0013] The NTP generator includes a stainless steel tube, on which a quartz glass tube is fitted. A gap is left between the inner wall of the quartz glass tube and the outer wall of the stainless steel tube. A fine wire mesh is provided on the outer wall of the quartz glass tube. The fine wire mesh and the stainless steel tube are electrically connected to the positive and negative terminals of a power supply device, respectively. The stainless steel tube is connected to the water tank through a cooling medium inlet pipe and a cooling medium outlet pipe. The gap is connected to the oxygen generator through a gas source inlet pipe. The gap is connected to the main air inlet pipe through a gas source outlet pipe. The middle part of the gas source outlet pipe is connected to the air supply fan.

[0014] The ECU control module is electrically connected to the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, and the tenth valve.

[0015] Preferably, the first heating chamber is equipped with a first DPF, a first pressure sensor, and a first temperature monitoring instrument; the second heating chamber is equipped with a second DPF, a second pressure sensor, and a second temperature monitoring instrument; the first pressure sensor, the first temperature monitoring instrument, the second pressure sensor, and the second temperature monitoring instrument are all electrically connected to the ECU control module, the air inlet of the first DPF and the air inlet of the second DPF are connected through the main air inlet pipe, and the air outlet of the first DPF and the air outlet of the second DPF are connected through the main air outlet pipe.

[0016] Preferably, the power supply device includes a relay, the positive and negative terminals of which are electrically connected to the fine wire mesh and the stainless steel pipe, respectively. The relay is connected to an inverter / booster, which is located on the line connecting the relay and the stainless steel pipe. Both the inverter / booster and the relay are connected to an oscilloscope, which is located on the line connecting the relay and the fine wire mesh.

[0017] Preferably, the first valve is disposed on the air source inlet pipe, the second valve is disposed on the side of the main inlet pipe near the inlet end of the first DPF, the third valve is disposed on the side of the main inlet pipe near the inlet end of the second DPF, the fifth valve is disposed on the side of the main outlet pipe near the outlet end of the first DPF, and the sixth valve is disposed on the side of the main outlet pipe near the outlet end of the second DPF.

[0018] Preferably, the ninth valve is installed on the first exhaust waste heat pipe, and the tenth valve is installed on the second exhaust waste heat pipe.

[0019] Preferably, the fourth valve is located on the pipe near the air supply fan.

[0020] Preferably, the seventh valve is located at the air inlet end of the bidirectional air pump and connected to the main air inlet pipe.

[0021] This invention also provides a control method for a carbon removal device based on NTP technology combined with a dry ice generator, comprising the following steps:

[0022] S1. Conduct calibration tests on the NTP regeneration DPF system to determine the upper limit of the DPF pressure differential;

[0023] S2. Insert the first DPF into the heating chamber;

[0024] S3. When the ECU control module detects that the temperature at both ends of the first DPF reaches the preset temperature requirement, the control module sends a signal to close the third valve, the fourth valve, and the fifth valve, and open the second valve.

[0025] S4. The ECU control module sends a signal to the oxygen generator and NTP generator to turn on the NTP generator; the first valve is opened and the NTP generator produces active substances that enter the first DPF to oxidize the particulate deposits in the DPF.

[0026] S5. The ECU control module controls the first valve to close. When the ECU control module detects the pressure fluctuation from the first pressure sensor, the control module sends a signal to the first temperature detector. The first temperature detector is turned on, and the temperature is adjusted to the optimal regeneration temperature of the DPF according to the pressure change in the first DPF.

[0027] S6. When the ECU control module detects that the temperature transmitted by the first temperature detector is higher than the preset reaction temperature range, it stops the regeneration of the first DPF. The ECU control module opens the ninth valve and introduces exhaust gas into the second DPF through the first exhaust waste heat pipe to accelerate the heating of the second DPF. At the same time, the ECU control module sends a signal to the second heating box to start preheating and monitors the temperature of the second DPF through the second temperature detector. When the ECU control module detects that the temperature at both ends of the second DPF reaches the preset temperature requirement, the ECU control module sends a signal to close the second valve, the fourth valve, and the sixth valve, and open the third valve.

[0028] S7. When the ECU control module detects that the temperature ΔT of the second DPF transmitted by the second temperature monitor has reached the corresponding optimal regeneration temperature, the ECU control module sends a signal to the air supply fan; cooling air is blown into the first heating box from the duct to accelerate the heat dissipation inside the first DPF, and then flows out from the duct; when the ECU control module detects that the temperature ΔT of the second temperature monitor is the optimal regeneration temperature of the current DPF pressure, the ECU control module sends a signal to shut down the air supply fan;

[0029] S8. The gas generated during the regeneration of the first DPF enters the main outlet pipe through the second DPF and enters the dry ice generator. An adsorption device that fully adsorbs carbon dioxide is installed, and dry ice is formed through the dry ice generator and enters the dry ice generator. The gas passing through the dry ice generator enters the ozone detector, and the gas detected enters the bidirectional gas pump. The ECU control module sends a signal, and the gas enters the DPF for regeneration again through the seventh valve or is discharged through the eighth valve.

[0030] S9. The second DPF regeneration process is the same as the first DPF regeneration process, with the two DPFs being regenerated alternately and continuously.

[0031] Preferably, in S2, the first DPF is preheated by the first heating box, and the temperature of the first DPF is monitored and controlled by the first temperature monitoring instrument.

[0032] The present invention discloses the following technical effects:

[0033] 1. This invention utilizes parallel and alternating operation of DPFs to achieve efficient DPF regeneration, effectively improving the recycling rate of DPFs and reducing PM emissions from diesel engine exhaust. During the intervals between DPF operation, NTP is used to regenerate the DPFs, and a temperature monitoring device controls the reaction temperature, enabling rapid and complete regeneration. Utilizing exhaust waste heat accelerates the temperature response, which not only benefits DPF regeneration but also achieves energy conservation and emission reduction. By incorporating a dry ice generator, CO2 emissions can be minimized.

[0034] 2. This invention enables the simultaneous regeneration of multiple DPFs and can be applied to designated service stations to provide efficient DPF cleaning services. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the first heating box of the present invention;

[0038] Figure 3 This is a schematic diagram of the NTP generator of the present invention;

[0039] Figure 4 This is a schematic diagram of the control flow of the present invention;

[0040] Among them, 101, oxygen generator; 102, water tank; 103, NTP generator; 104, first heating chamber; 105, second heating chamber; 106, first DPF; 107, second DPF; 108, dry ice generator; 109, dry ice storage tank; 201, NTP power supply; 202, heating chamber power supply; 203, air supply fan; 204, ECU control module; 205, bidirectional air pump; 206, dry ice generator power supply; 301, NTP temperature detector; 302, first pressure sensor; 303, second pressure sensor; 304, first temperature monitoring device; 305, second temperature monitoring device; 306, ozone detector; 401, first valve. 402. Second valve; 403. Third valve; 404. Fourth valve; 405. Fifth valve; 406. Sixth valve; 407. Seventh valve; 408. Eighth valve; 409. Ninth valve; 410. Tenth valve; 501. First exhaust waste heat pipe; 502. Second exhaust waste heat pipe; 503. Main intake pipe; 504. Main exhaust pipe; 601. Cooling medium water inlet pipe; 603. Air source intake pipe; 604. Fine wire mesh; 605. Quartz glass tube; 606. Stainless steel pipe; 607. Oscilloscope; 608. Inverter voltage booster; 609. Air source exhaust pipe; 610. Cooling medium water outlet pipe; 611. Relay. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Reference Figures 1-3This invention provides a carbon removal device based on NTP technology combined with a dry ice generator, comprising a dual DPF device. The two ends of the dual DPF device are respectively connected to an NTP generator 103 and a dry ice generator 108. The NTP generator 103 and the dry ice generator 108 are interconnected. A pipe connecting the NTP generator 103 and the dual DPF device is connected to an air supply fan 203. The NTP generator 103 is connected to a water tank 102 and an oxygen generator 101. The water tank 102 contains a cooling medium. The dry ice generator 108 is connected to a dry ice storage device. The dry ice generator 108 is connected to one end of a two-way air pump 205, and the other end of the two-way air pump 205 is connected to the pipeline connecting the NTP generator 103 and the dual DPF device. The dual DPF device, NTP generator 103, dry ice generator 108, air supply fan 203, water tank 102, oxygen generator 101, and two-way air pump 205 are all electrically connected to an ECU control module 204. The oxygen generator 101 provides air to the NTP generator 103, and the oxygen generator 101 controls the gas flow rate to be 10L / min. An NTP temperature detector 301 is connected between the NTP generator 103 and the water tank 102, and the dry ice generator 108 is connected to a dry ice generator power supply 206.

[0044] The dual DPF device includes a first heating chamber 104 and a second heating chamber 105. Both the first heating chamber 104 and the second heating chamber 105 are connected to a heating chamber power supply 202. The first heating chamber 104 and the second heating chamber 105 are connected to each other through a main air inlet pipe 503, a main air outlet pipe 504, and a first exhaust waste heat pipe 501, respectively. The main air inlet pipe 503 is connected to the pipe connecting the NTP generator 103 and the dual DPF device. The main air outlet pipe 504 is connected to a dry ice generator 108. The air outlets of the first heating chamber 104 and the second heating chamber 105 are both connected to the dry ice generator 108. The second heating chamber 105 is connected to the first heating chamber 104 through a second exhaust waste heat pipe 502.

[0045] The NTP generator 103 includes a stainless steel tube 606, on which a quartz glass tube 605 is sleeved. The stainless steel tube 606 is located inside the quartz glass tube 605 and is coaxially arranged with it. A gap is left between the inner wall of the quartz glass tube 605 and the outer wall of the stainless steel tube 606. A fine wire mesh 604 is provided on the outer wall of the quartz glass tube 605. The fine wire mesh 604 and the stainless steel tube 606 are electrically connected to the positive and negative terminals of a power supply device, respectively. The stainless steel tube 606 is connected to a water tank 102 through a cooling medium inlet pipe 601 and a cooling medium outlet pipe 610. Air is introduced through the gap via an air source. Pipe 603 is connected to oxygen generator 101, and the gap is connected to main air inlet pipe 503 through air source outlet pipe 609. The middle part of air source outlet pipe 609 is connected to air supply fan 203. The NTP generator is a dielectric barrier discharge type, using stainless steel tube 606 as low-voltage electrode, quartz glass tube 605 as dielectric barrier, and fine iron wire mesh 604 as high-voltage electrode. NTP generator 103 is connected to NTP power supply 201. The voltage and frequency of NTP power supply 201 are adjustable, and power supplies such as electronic impact machine and inverter voltage booster 608 can be used. Oscilloscope 607 is used to record different discharge conditions of the power supply.

[0046] The ECU control module 204 is electrically connected to the first valve 401, the second valve 402, the third valve 403, the fourth valve 404, the fifth valve 405, the sixth valve 406, the seventh valve 407, the eighth valve 408, the ninth valve 409, and the tenth valve 410.

[0047] This invention utilizes parallel and alternating operation of DPFs to achieve efficient DPF regeneration, effectively improving the recycling rate of DPFs and reducing PM emissions from diesel engine exhaust. During the intervals between DPF operation, NTP is used to regenerate the DPFs, and a temperature monitoring device controls the reaction temperature, enabling rapid and complete regeneration. Utilizing exhaust waste heat accelerates the temperature response, which not only benefits DPF regeneration but also achieves energy conservation and emission reduction. By incorporating a dry ice generator, CO2 emissions can be minimized.

[0048] This invention enables the simultaneous regeneration of multiple DPFs and can be applied to designated service stations to provide efficient DPF cleaning services.

[0049] Further optimization of the scheme: the first heating box 104 and the second heating box 105 have the same structure. The first heating box 104 is equipped with a first DPF 106, a first pressure sensor 302, and a first temperature detector 304; the second heating box 105 is equipped with a second DPF 107, a second pressure sensor 303, and a second temperature detector 305. The first pressure sensor 302, the first temperature detector 304, the second pressure sensor 303, and the second temperature detector 305 are all electrically connected to the ECU control module 204. The air inlet of the first DPF 106 and the air inlet of the second DPF 107 are connected through the main air inlet pipe 503, and the air outlet of the first DPF 106 and the air outlet of the second DPF 107 are connected through the main air outlet pipe. The first temperature monitoring instrument 304 and the second temperature monitoring instrument 305 are made of stainless steel and have internal resistance heating wires; the first DPF 106 and the second DPF 107 are both made of wall-flow honeycomb ceramic material with a pore density of 100 cpsi, a diameter of 144 mm, and a busbar length of 152 mm; the second valve 402 and the third valve 403 are each connected to two nozzles, each nozzle being connected to a nozzle located 100 mm from the air inlet of the first and second DPFs; the second DPF 107... The regeneration process is the same as the regeneration process of the first DPF106, with the two DPF systems regenerating alternately and continuously. The gas discharged from the tail end of the first DPF106 is introduced into the second temperature monitoring instrument 305 through the first exhaust waste heat pipe, and then discharged from the second DPF107 through the second exhaust pipe. The gas discharged from the tail end of the second DPF107 is introduced into the first temperature monitoring instrument 304 through the second exhaust waste heat pipe 502, and then discharged from the first DPF106 through the first exhaust pipe.

[0050] In a further optimized design, the power supply device includes a relay 611. The positive and negative terminals of the relay 611 are electrically connected to the fine wire mesh 604 and the stainless steel tube 606, respectively. The relay 611 is connected to an inverter voltage booster 608, which is located on the line connecting the relay 611 and the stainless steel tube 606. Both the inverter voltage booster 608 and the relay 611 are connected to an oscilloscope 607, which is located on the line connecting the relay 611 and the fine wire mesh 604.

[0051] Further optimization of the scheme: the first valve 401 is installed on the air source inlet pipe 603; the second valve 402 is installed on the side of the main inlet pipe 503 near the inlet end of the first DPF 106; the third valve 403 is installed on the side of the main inlet pipe 503 near the inlet end of the second DPF 107; the fifth valve 405 is installed on the side of the main outlet pipe near the outlet end of the first DPF 106; and the sixth valve 406 is installed on the side of the main outlet pipe near the outlet end of the second DPF.

[0052] To further optimize the design, the ninth valve 409 is installed on the first exhaust waste heat pipe 501, and the tenth valve 410 is installed on the second exhaust waste heat pipe 502.

[0053] To further optimize the design, the fourth valve 404 is installed on the pipeline near the air supply fan 203.

[0054] To further optimize the design, the seventh valve 407 is installed at the air inlet of the bidirectional air pump 205 and connected to the main air inlet pipe 503.

[0055] The ECU control module 204 sends a signal to open the first heating chamber 104 and close the second valve 402, fifth valve 405, and ninth valve 409. The ECU control module 204 also sends a signal to turn on the oxygen generator 101, opening the first valve 401 to supply gas to the NTP generator 103. The second valve 402 is then opened, allowing NTP active material to flow into the first DPF 106. The ECU control module 204 then sends a signal to turn on the first temperature monitoring instrument 304, causing the active material to react with particulate matter, and the first DPF 106 begins regeneration. The ECU control module 204 then sends a signal to start heating in the second heating chamber 105, opening the ninth valve 409. The exhaust gas from the regenerated first DPF enters the second DPF through the first exhaust waste heat duct to accelerate the temperature effect. The sixth valve 406 opens to discharge the exhaust gas generated by the first DPF 106. The regeneration process of the first DPF 106 is repeated.

[0056] This invention also discloses a control method for a carbon removal device based on NTP technology combined with a dry ice generator, comprising the following steps:

[0057] S1. Conduct calibration tests on the NTP regeneration DPF system to determine the upper limit of the DPF pressure difference; pre-determine the upper limit of the DPF pressure difference ΔP through calibration tests. m and regeneration target value ΔP n And set the upper limit of the pressure difference ΔP m Regeneration target value ΔP n The optimal temperature change ΔT for the reaction between the active material generated by the NTP generator 103 and the particulate matter accumulated in the DPF is stored in the ECU control module 204 through a large number of experiments.

[0058] S2. The first DPF106 is installed in the heating box, and the set heating temperature T1 and the stop heating temperature T3 are stored in the ECU control module 204. The optimal regeneration temperature change ΔT of the DPF is also stored in the control module. The first DPF106 is preheated through the first heating box 104, and the temperature of the first DPF106 is monitored and controlled by the first temperature monitoring instrument 304.

[0059] S3. When the ECU control module 204 detects that the temperature at both ends of the first DPF106 reaches the preset temperature requirement, the control module sends a signal to close the third valve 403, the fourth valve 404, and the fifth valve 405, and open the second valve 402.

[0060] S4.ECU control module 204 sends a signal to oxygen generator 101 and NTP generator 103 to turn on NTP generator 103; the first valve 401 is opened and NTP generator 103 generates active substances that enter the first DPF 106 to oxidize particulate deposits in DPF.

[0061] S5. The ECU control module 204 controls the first valve 401 to close; when the ECU control module 204 detects the pressure fluctuation transmitted by the first pressure sensor 302, the ECU control module 204 sends a signal to the first temperature detector 304; the first temperature detector 304 is turned on, and the temperature is adjusted to the optimal regeneration temperature of the DPF according to the pressure change in the first DPF 106.

[0062] S6. When the ECU control module 204 detects that the temperature transmitted by the first temperature detector 304 is higher than the preset reaction temperature range, it stops the regeneration of the first DPF 106. The ECU control module 204 opens the ninth valve 409 and introduces the exhaust gas into the second DPF 107 through the first exhaust waste heat pipe 501 to accelerate the heating of the second DPF 107. At the same time, the ECU control module 204 sends a signal to the second heating box 105 to start preheating and monitors the temperature of the second DPF 107 through the second temperature detector 305. When the ECU control module 204 detects that the temperature at both ends of the second DPF 107 reaches the preset temperature requirement, the ECU control module 204 sends a signal to close the second valve 402, the fourth valve 404, and the sixth valve 406, and open the third valve 403.

[0063] S7. When the ECU control module 204 detects that the temperature ΔT of the second DPF 107 transmitted by the second temperature monitor 305 has reached the corresponding optimal regeneration temperature, the ECU control module 204 sends a signal to the air supply fan 203; cooling air is blown into the first heating box 104 from the duct to accelerate the heat dissipation inside the first DPF 106, and then flows out from the duct; when the ECU control module 204 detects that the temperature ΔT of the second temperature monitor 305 is the optimal regeneration temperature of the current DPF pressure, the ECU control module 204 sends a signal to shut down the air supply fan 203;

[0064] S8. The gas generated during the regeneration of the first DPF106 enters the main outlet pipe 504 through the second DPF107 and enters the dry ice generator 108. The dry ice generator 108 is equipped with a solenoid valve and an adsorption device that fully adsorbs carbon dioxide. The dry ice is formed by passing through the dry ice generator 108 and enters the dry ice generator 108. The gas after passing through the dry ice generator 108 enters the ozone detector 306. The detected gas enters the bidirectional air pump 205. The ECU control module 204 sends a signal to either enter the DPF for regeneration again through the seventh valve 407 or be discharged through the eighth valve 408.

[0065] S9. The second DPF107 regeneration process is the same as the first DPF106 regeneration process, with the two DPFs being regenerated alternately and continuously.

[0066] Further optimization of the scheme: in S2, the first DPF106 is preheated by the first heating box 104, and the temperature of the first DPF106 is monitored and controlled by the first temperature monitoring instrument 304.

[0067] Reference Figure 4 The flowchart describes the exemplary steps performed by the ECU control module 204; first, a calibration test is performed on the NTP regeneration DPF system to determine the upper limit of the DPF pressure difference, and the upper limit of the DPF pressure difference ΔP is determined in advance through the calibration test. m and regeneration target value ΔP n And set the upper limit of the pressure difference ΔP m Regeneration target value ΔP n Stored in ECU control module 204.

[0068] In control step 701, the first pressure sensor 302 transmits the measured pressure ΔP1 across the first DPF to the ECU control module 204; in control step 702, the ECU control module 204 receives the pressure ΔP1 of the first DPF and compares the acquired ΔP1 with the pressure P... m Compare, if ΔP1 is less than P m If the condition is met, the control step proceeds to step 703, closing the second valve 402, the fifth valve 405, and the ninth valve 409, and opening the first heating box 104; otherwise, the control returns to step 701 until ΔP1 is less than ΔP. m; Enter control step 704, if the temperature T1 of the first DPF inside the heating chamber is ≥100℃, enter control step 705; otherwise, enter control step 703; Enter control step 703, open the first valve 401 and the second valve 402, and close the third valve 403; Enter control step 706, turn on the oxygen generator 101, turn on the NTP generator 103, and turn on the first temperature detector 304; Enter control step 707; Enter control step 708, if the first temperature detector 304 detects that the temperature T1 of the first DPF106 is ≥240℃; Enter control step 709, turn on the second heating chamber 105; Enter control step 717, if the first temperature detector 304 detects that the temperature T1 of the first DPF106 is >300℃, enter control step 718, close the second valve 402, open the ninth valve 409, and the high-temperature waste generated by the regeneration of the first DPF enters the second DPF107, accelerating the heating of the second DPF107; Enter control step 705; Step 719: Turn on the air supply fan 203 and the fourth valve 404 to cool the first DPF; proceed to control step 720: if the temperature of the first DPF is 100℃≤T3≤150℃, proceed to control step 705 to wait for regeneration; otherwise, proceed to step 719; proceed to control step 721: open the sixth valve 406 to discharge the waste gas generated by the first DPF; proceed to control step 710: if the temperature of the second DPF 107 is T3≥100℃, otherwise proceed to step 709; proceed to step 711: repeat the process of regenerating and cooling the first DPF; proceed to control step 722: the waste gas generated by regenerating the DPF enters the dry ice generator 108; proceed to control step 723: the regenerated gas enters the ozone detector 306 and the bidirectional air pump 205; proceed to control step 724: if the gas contains ozone, open the seventh valve 407 to allow the regenerated gas to enter the main air inlet pipe; otherwise, open the eighth valve 408 to discharge the gas.

[0069] The NTP regeneration DPF system of the present invention adopts NTP injection and parallel alternating continuous regeneration treatment of DPF, realizing a dual DPF regeneration process. During the regeneration process, the exhaust waste heat is used to produce regenerated gas for manufacturing dry ice, which is highly economical, practical, energy-saving and emission-reducing.

[0070] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0071] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A carbon removal device based on NTP technology combined with a dry ice generator, characterized in that: The device includes a dual DPF unit, with an NTP generator (103) and a dry ice generator (108) connected to its two ends respectively. The NTP generator (103) and the dry ice generator (108) are connected in a continuous manner. A gas supply fan (203) is connected to the pipeline connecting the NTP generator (103) and the dual DPF unit. The NTP generator (103) is connected to a water tank (102) and an oxygen generator (101). The dry ice generator (108) is connected to a dry ice storage container (100). 9) The dry ice generator (108) is connected to one end of a bidirectional air pump (205), and the other end of the bidirectional air pump (205) is connected to the pipeline connecting the NTP generator (103) and the dual DPF device. The dual DPF device, the NTP generator (103), the dry ice generator (108), the air supply fan (203), the water tank (102), the oxygen generator (101), and the bidirectional air pump (205) are all electrically connected to an ECU control module (204). The dual DPF device includes a first heating chamber (104) and a second heating chamber (105). The first heating chamber (104) and the second heating chamber (105) are connected to each other through a main air inlet pipe (503), a main air outlet pipe (504), and a first exhaust waste heat pipe (501). The main air inlet pipe (503) is connected to the pipe connecting the NTP generator (103) and the dual DPF device. The main air outlet pipe (504) is connected to the dry ice maker (108). The air outlets of the first heating chamber (104) and the second heating chamber (105) are both connected to the dry ice maker (108). The second heating chamber (105) is connected to the first heating chamber (104) through a second exhaust waste heat pipe (502). The NTP generator (103) includes a stainless steel tube (606), on which a quartz glass tube (605) is fitted. A gap is left between the inner wall of the quartz glass tube (605) and the outer wall of the stainless steel tube (606). A fine wire mesh (604) is provided on the outer wall of the quartz glass tube (605). The fine wire mesh (604) and the stainless steel tube (606) are electrically connected to the positive and negative poles of a power supply device, respectively. The stainless steel tube (606) is connected to the water tank (102) through a cooling medium inlet pipe (601) and a cooling medium outlet pipe (610). The gap is connected to the oxygen generator (101) through a gas source inlet pipe (603). The gap is connected to the main inlet pipe (503) through a gas source outlet pipe (609). The middle part of the gas source outlet pipe (609) is connected to the gas supply fan (203). The ECU control module (204) is electrically connected to a first valve (401), a second valve (402), a third valve (403), a fourth valve (404), a fifth valve (405), a sixth valve (406), a seventh valve (407), an eighth valve (408), a ninth valve (409), and a tenth valve (410). The first heating chamber (104) is equipped with a first DPF (106), a first pressure sensor (302), and a first temperature monitoring instrument (304); the second heating chamber (105) is equipped with a second DPF (107), a second pressure sensor (303), and a second temperature monitoring instrument (305). The first valve (401) is installed on the gas source inlet pipe (603), the second valve (402) is installed on the side of the main inlet pipe (503) near the inlet end of the first DPF (106), the third valve (403) is installed on the side of the main inlet pipe (503) near the inlet end of the second DPF (107), the fifth valve (405) is installed on the side of the main outlet pipe (504) near the outlet end of the first DPF (106), and the sixth valve (406) is installed on the side of the main outlet pipe (504) near the outlet end of the second DPF (107). The ninth valve (409) is installed on the first exhaust waste heat pipe (501), and the tenth valve (410) is installed on the second exhaust waste heat pipe (502); The fourth valve (404) is located on the pipe near the air supply fan (203); The seventh valve (407) is located at the air inlet end of the bidirectional air pump (205) and connected to the main air inlet pipe (503); The detected gas enters the bidirectional air pump (205) and is either regenerated in the DPF through the seventh valve (407) or discharged through the eighth valve (408).

2. The carbon removal device based on NTP technology combined with a dry ice generator according to claim 1, characterized in that: The first pressure sensor (302), the first temperature detector (304), the second pressure sensor (303), and the second temperature detector (305) are all electrically connected to the ECU control module (204). The air inlet of the first DPF (106) and the air inlet of the second DPF (107) are connected through the main air inlet pipe (503). The air outlet of the first DPF (106) and the air outlet of the second DPF (107) are connected through the main air outlet pipe (504).

3. The carbon removal device based on NTP technology combined with a dry ice generator according to claim 1, characterized in that: The power supply device includes a relay (611), the positive and negative terminals of which are electrically connected to the fine wire mesh (604) and the stainless steel pipe (606), respectively. The relay (611) is connected to an inverter booster (608), which is located on the line connecting the relay (611) and the stainless steel pipe (606). Both the inverter booster (608) and the relay (611) are connected to an oscilloscope (607), which is located on the line connecting the relay (611) and the fine wire mesh (604).

4. A control method for a carbon removal device based on NTP technology combined with a dry ice generator, based on the carbon removal device based on NTP technology combined with a dry ice generator as described in any one of claims 1-3, characterized in that: Includes the following steps: S1. Conduct calibration tests on the NTP regeneration DPF system to determine the upper limit of the DPF pressure differential; S2. Place the first DPF (106) into the heating chamber; S3. When the ECU control module (204) detects that the temperature at both ends of the first DPF (106) reaches the preset temperature requirement, the control module sends a signal to close the third valve (403), the fourth valve (404), and the fifth valve (405) and open the second valve (402); S4. The ECU control module (204) sends a signal to the oxygen generator (101) and the NTP generator (103) to turn on the NTP generator (103); the first valve (401) is opened and the NTP generator (103) generates active substances that enter the first DPF (106) to oxidize the particulate deposits in the DPF. S5. The ECU control module (204) controls the first valve (401) to close. When the ECU control module (204) detects the pressure fluctuation transmitted by the first pressure sensor (302), the ECU control module (204) sends a signal to the first temperature detector (304); the first temperature detector (304) is turned on, and the temperature is adjusted to the optimal regeneration temperature of the DPF according to the pressure change in the first DPF (106). S6. When the ECU control module (204) detects that the temperature transmitted by the first temperature detector (304) is higher than the preset reaction temperature range, it stops the regeneration of the first DPF (106). The ECU control module (204) opens the ninth valve (409) and introduces the exhaust gas into the second DPF (107) through the first exhaust waste heat pipe (501) to accelerate the heating of the second DPF (107). At the same time, the ECU control module (204) sends a signal to the second heating box (105) to start preheating and monitors the temperature of the second DPF (107) through the second temperature detector (305). When the ECU control module (204) detects that the temperature at both ends of the second DPF (107) reaches the preset temperature requirement, the ECU control module (204) sends a signal to close the second valve (402), the fourth valve (404), and the sixth valve (406) and open the third valve (403). S7. When the ECU control module (204) detects that the temperature ΔT of the second DPF (107) transmitted by the second temperature monitor (305) has reached the corresponding optimal regeneration temperature, the ECU control module (204) sends a signal to the air supply fan (203); cooling air is blown into the first heating box (104) from the duct to accelerate the heat dissipation inside the first DPF (106), and then flows out from the duct; when the ECU control module (204) detects that the temperature ΔT of the second temperature monitor (305) is the optimal regeneration temperature of the current DPF pressure, the ECU control module (204) sends a signal to shut down the air supply fan (203). S8. The gas generated during the regeneration of the first DPF (106) enters the main outlet pipe (504) through the second DPF (107) and enters the dry ice generator (108). An adsorption device that fully adsorbs carbon dioxide is installed, and dry ice is formed through the dry ice generator (108) and enters the dry ice generator (108). The gas passing through the dry ice generator (108) enters the ozone detector (306), and the gas detected enters the bidirectional air pump (205). The ECU control module (204) sends a signal, and the gas enters the DPF for regeneration through the seventh valve (407) or is discharged through the eighth valve (408). S9. The regeneration process of the second DPF (107) is the same as that of the first DPF (106), with the two DPFs being regenerated alternately and continuously.

5. The control method for the carbon removal device based on NTP technology combined with a dry ice generator according to claim 4, characterized in that: In S2, the first DPF (106) is preheated by the first heating box (104), and the temperature of the first DPF (106) is monitored and controlled by the first temperature monitoring instrument (304).

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