A paper innocuous destruction device and method

Abstract

This invention relates to a paper harmless destruction device and method, specifically in the field of document destruction technology, comprising: a carbonization module, an ashing module, and a gas washing module connected sequentially by pipelines; the carbonization module has an inlet on its side or top; the carbonization module has a first air inlet and a first oxygen-enriched gas inlet; the first oxygen-enriched gas inlet is equipped with a first heater; the ashing module has a second air inlet and a second oxygen-enriched gas inlet; the second oxygen-enriched gas inlet is equipped with a second heater; and the gas washing module has a gas washing liquid module. The paper harmless destruction device provided by this invention, through carbonization → ashing → water washing, achieves multiple advancements including low-power rapid start-up, solid waste reduction and resource recovery, and convenient operation and maintenance, possessing the advantages of complete transformation from paper to gas and then to harmless residues.

Description

Technical Field

[0001] This invention relates to the field of document destruction technology, specifically to a paper harmless destruction device and method, and more particularly to a combustion-type destruction device and method for handling classified waste paper. Background Technology

[0002] Currently, in the field of information security, the physical destruction of classified paper documents is one of the last and most critical lines of defense against information leakage. Traditional methods of destroying classified documents mainly include incineration, melting, chemical dissolution, and mechanical shredding.

[0003] For example, CN107081209A discloses a combustion-type paper shredder based on automatic controller control. It includes a control panel, a control module, a drive unit, a paper inlet, a combustion chamber, a shredder bin, and an alarm device. The control module includes a microprocessor. The control module is connected to the drive unit. The drive unit drives the paper inlet to close and seal. When paper enters from the paper inlet, a limit sensor is triggered to close the paper inlet. The paper inlet is connected to the combustion chamber. The combustion chamber includes a ventilation device, an electronic ignition device, and a flue gas filter. The control module is connected to the ventilation device and the electronic ignition device, and the combustion chamber is connected to the shredder bin.

[0004] However, existing combustion-type classified document destruction equipment mainly uses an oxygen-deficient carbonization method to process paper into shreds at high temperatures. But in actual long-term operation, it has been found that this type of solution has the following technical bottlenecks:

[0005] ① Incomplete combustion: Combustion in the absence of oxygen produces a large amount of incomplete combustion products such as CO and tar gas, which harm the environment and pose a risk of reignition;

[0006] ② High energy consumption and slow start-up: It requires a high-power electric heating element (5-10kW) to preheat for more than 30 minutes to reach the processing conditions, which affects the processing efficiency;

[0007] ③ Large amount of solid waste: The product is carbonized powder, which requires a large amount of water to rinse and dilute, and is limited by water supply and drainage conditions;

[0008] ④ Complex maintenance: Damage to key components such as electric heating elements requires specialized tools for disassembly and repair, affecting continuous operation. Summary of the Invention

[0009] In view of the problems existing in the prior art, the purpose of the present invention is to provide a paper harmless destruction device and method, which has the advantages of low installed power, fast start-up, complete combustion and easy maintenance.

[0010] To achieve this objective, the present invention adopts the following technical solution:

[0011] In a first aspect, the present invention provides a paper harmless disposal device, the paper harmless disposal device comprising:

[0012] The carbonization module, ashing module, and gas scrubbing module are connected sequentially by pipelines;

[0013] The carbonization module is provided with a dispensing port on its side or top;

[0014] The carbonization module is provided with a first air inlet and a first oxygen-enriched gas inlet; the first oxygen-enriched gas inlet is equipped with a first heater.

[0015] The ashing module is provided with a second air inlet and a second oxygen-enriched gas inlet; the second oxygen-enriched gas inlet is equipped with a second heater.

[0016] The gas washing module is equipped with a gas washing liquid module.

[0017] The paper harmless destruction device provided by this invention achieves multiple advancements through carbonization → ashing → water washing, including low-power rapid start-up, solid waste reduction and resource utilization, and convenient operation and maintenance. It has the advantage of complete transformation from paper to gas and then to harmless residue.

[0018] As a preferred technical solution of the present invention, the paper harmless destruction device further includes an air conveying module.

[0019] Preferably, the air delivery module is connected to the first air inlet and the second air inlet, respectively.

[0020] As a preferred technical solution of the present invention, the paper harmless destruction device further includes: an oxygen-enriched gas supply module.

[0021] Preferably, the oxygen-enriched gas outlet of the oxygen-enriched gas supply module is connected to the first oxygen-enriched gas inlet and the second oxygen-enriched gas inlet, respectively.

[0022] As a preferred technical solution of the present invention, the first oxygen-enriched gas inlet of the carbonization module is disposed at the bottom or side of the carbonization module, and the first air inlet is disposed at the bottom of the carbonization module.

[0023] Preferably, the second oxygen-enriched gas inlet of the ashing module is located at the top or bottom of the ashing module, and the second air inlet is located on the side of the ashing module.

[0024] Preferably, the paper harmless disposal device further includes a control unit.

[0025] As a preferred technical solution of the present invention, the paper harmless destruction device further includes: a control unit.

[0026] Secondly, the present invention provides a method for the harmless disposal of paper, the method comprising:

[0027] The paper is subjected to rapid carbonization, self-sustaining carbonization, and self-sustaining ash formation in sequence.

[0028] The exhaust gas obtained from the self-sustaining ashing process is then subjected to gas washing and purification.

[0029] As a preferred technical solution of the present invention, the rapid carbonization includes: feeding paper into the carbonization module, using a heating device and introducing oxygen-enriched gas for local oxygen-enriched heating, so that the paper is heated to the ignition point.

[0030] As a preferred technical solution of the present invention, the oxygen concentration in the paper ignition area of ​​the carbonization module is controlled to be ≥21% during the rapid carbonization process.

[0031] Preferably, the oxygen concentration in the non-ignition area of ​​the carbonization module is controlled to be <20.9% during the rapid carbonization process.

[0032] As a preferred technical solution of the present invention, the self-sustaining carbonization includes: when the temperature of the carbonization module reaches the self-sustaining threshold, stopping the heating equipment and oxygen-enriched gas, and introducing air to maintain the self-sustaining threshold.

[0033] Preferably, the self-sustaining threshold is 350-650℃.

[0034] As a preferred technical solution of the present invention, the self-sustaining ashing includes: adjusting the gas input to maintain the ashing temperature of the ashing module and stopping the electric heating.

[0035] Preferably, the ashing temperature in the self-sustaining ashing process is controlled at 700-900℃.

[0036] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0037] The paper harmless destruction device provided by this invention has a high efficiency destruction effect and has the advantages of low installed power, fast start-up, complete combustion and easy maintenance. Compared with the prior art (CN215175111U), the harmless destruction device of this invention has a start-up time of <15min, low installed power, comprehensive power consumption ≤3kWh, outlet CO concentration <500ppm, and ash residue rate <2%. At the same time, it adopts a modular design, which can realize modular installation and replacement. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a paper harmless disposal device provided in an embodiment of the present invention;

[0039] Figure 2 This is a flowchart of the paper harmless disposal method provided in Embodiment 1 of the present invention.

[0040] In the diagram: 100-carbonization module, 110-feeding port, 120-first air inlet, 130-first oxygen-enriched gas inlet, 140-first heater, 200-ashing module, 210-second air inlet, 220-second oxygen-enriched gas inlet, 230-second heater, 300-gas scrubbing module, 310-gas disperser, 320-heat exchanger, 330-cleaning gas outlet, 400-air conveying module, 500-oxygen-enriched gas supply module.

[0041] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0042] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0043] Currently, existing combustion-type classified document destruction equipment mainly uses an oxygen-deficient carbonization method to process paper into powder at high temperatures. However, in actual long-term operation, it has been found that this method has the following technical bottlenecks: ① Incomplete combustion: Oxygen-deficient combustion produces a large amount of incomplete combustion products such as CO and tar gas, which are harmful to the environment and pose a risk of reignition; ② High energy consumption and slow start-up: High-power electric heating tubes (5-10kW) are required for preheating for more than 30 minutes to reach the processing conditions, affecting processing efficiency; ③ Large amount of solid waste: The product is carbonized powder, which requires a large amount of water to rinse and dilute, which is limited by water supply and drainage conditions; ④ Complex maintenance: When key components such as electric heating tubes are damaged, they need to be disassembled and repaired with professional tools, affecting continuous operation. Based on this, this invention, through optimized design and with the help of a collaborative design of "three-step method + three controls", achieves multiple improvements such as low-power rapid start-up, solid waste reduction and resource utilization, and convenient operation and maintenance, as detailed below:

[0044] I. This embodiment provides a paper harmless disposal device, such as... Figure 1 As shown, the paper harmless disposal device includes:

[0045] The carbonization module 100, the ashing module 200, and the gas scrubbing module 300 are connected in sequence by pipelines.

[0046] The carbonization module 100 is provided with a feeding port 110 on its side or top;

[0047] The carbonization module 100 is provided with a first air inlet 120 and a first oxygen-enriched gas inlet 130;

[0048] The first oxygen-enriched gas inlet 130 is equipped with a first heater 140;

[0049] The ashing module 200 is provided with a second air inlet 210 and a second oxygen-enriched gas inlet 220.

[0050] The second oxygen-enriched gas inlet 220 is equipped with a second heater 230;

[0051] The gas washing module 300 is equipped with a gas washing liquid module.

[0052] In this invention, the carbonization module 100, the ashing module 200, and the gas washing module 300 can be connected by quick connectors to achieve quick connection or replacement of each module.

[0053] In this invention, the feeding port 110 of the carbonization module 100 is used to put the classified documents to be destroyed into the carbonization module 100; the first heater 140 heats or ignites the paper; the first oxygen-enriched gas inlet 130 enriches the paper with oxygen to aid combustion; the first air inlet 120 is used to supplement the oxygen lacking in combustion and to purge the carbonized fly ash; the carbonization module 100 transports the combustible gas / slag to the ashing module 200 through the flue pipe.

[0054] In this invention, the first air inlet 120 and the first oxygen-enriched gas inlet 130 in the carbonization module 100 can be reasonably selected and set according to actual requirements. For example, they can be set on the side, top, bottom, etc. For example, the top of the side of the carbonization module 100 is provided with a feeding port 110, and the bottom of the side is provided with the first air inlet 120; or the first oxygen-enriched gas inlet 130 of the carbonization module 100 is set at the bottom or side of the carbonization module 100, and the first air inlet 120 is set at the bottom of the carbonization module 100.

[0055] In this invention, the ashing module 200 achieves the heating / ignition function through the second heater 230, and the second oxygen-enriched gas inlet 220 and the second air inlet 210 achieve the full combustion of combustible gas / slag under sufficient oxygen conditions to generate ashing gas / slag mainly composed of inorganic ash. This is the "ashing" process. Finally, the ashing gas / slag is discharged into the gas washing module 300 through the exhaust pipe.

[0056] In this invention, the second air inlet 210 and the second oxygen-enriched gas inlet 220 of the ashing module 200 can be reasonably selected and set according to actual requirements, such as being set on the side, top, bottom, etc. For example, the second air inlet 210 is set at the bottom of the side of the ashing module 200, and the second oxygen-enriched gas inlet 220 is set at the bottom; or the second oxygen-enriched gas inlet 220 of the ashing module 200 is set at the top or bottom of the ashing module 200, and the second air inlet 210 is set on the side of the ashing module 200.

[0057] In this invention, a check valve can be installed between the carbonization module 100 and the ashification module 200 to prevent backflow of flue gas.

[0058] In this invention, a check valve can be installed between the ashing module 200 and the gas washing module 300 to prevent backflow of flue gas.

[0059] The paper harmless disposal device also includes an air conveying module 400.

[0060] In this invention, the air delivery module 400 is used to provide a certain pressure of airflow for auxiliary combustion of paper, equipment cooling and subsequent airflow purging.

[0061] The air delivery module 400 is connected to the first air inlet 120 and the second air inlet 210, respectively.

[0062] The paper harmless disposal device also includes an oxygen-enriched gas supply module 500.

[0063] In this invention, the oxygen-enriched gas supply module 500 is used to provide oxygen-enriched gas with an oxygen content greater than 21%, such as oxygen-enriched air, to the heating parts in the carbonization module 100 that require rapid combustion, and to provide oxygen-enriched gas to the ashing module 200 to accelerate the combustion and heating process of the combustible gas / slag in the early stage.

[0064] The oxygen-enriched gas outlet of the oxygen-enriched gas supply module 500 is connected to the first oxygen-enriched gas inlet 130 and the second oxygen-enriched gas inlet 220, respectively.

[0065] The gas washing liquid module is equipped with a gas disperser 310 and a heat exchanger 320.

[0066] In this invention, the ashing gas / slag delivered from the ashing module 200 is passed through the gas disperser 310 into the washing liquid (such as water) for cleaning in the gas washing module 300. The high-temperature heat is absorbed by the washing liquid and recovered and reused through the heat exchanger 320. The solid residue is intercepted, and the purified exhaust gas is discharged outside the device through the exhaust pipe.

[0067] In this invention, the high-temperature gas (mainly CO2, water vapor and inorganic ash) discharged from the ashing module 200 enters the gas washing liquid module through the exhaust pipe. After being dispersed into tiny bubbles by the gas disperser 310, it comes into full contact with water. The ash is trapped by the water to form an ash-water mixture, and the purified gas is discharged from the exhaust port.

[0068] In this invention, since the main components of the ash from paper combustion are plant nutrients such as potassium carbonate, the ash-water mixture can be directly used for garden fertilization, thus realizing resource utilization.

[0069] In this invention, the heat exchanger 320 in the gas washing module 300 is used to export the heat of the high-temperature exhaust gas to the outside to ensure equipment safety.

[0070] The gas disperser 310 is positioned below the washing liquid level of the gas-washing liquid module.

[0071] The gas washing module 300 is equipped with a cleaning gas outlet 330.

[0072] The paper harmless disposal device also includes a control unit.

[0073] In this invention, the control unit can control the flow rate of the combustion-supporting gas in the carbonization module 100 to achieve a "partial oxygen-overall oxygen deficiency" incomplete combustion process of the confidential paper, so that it is carbonized into a fragile powder that is easy to purge, and produces combustible gas / slag containing CO, tar gas, etc.

[0074] In this invention, the control unit is used to implement predetermined process arrangements and safety alarms, and to control the reasonable operation of the harmless disposal device. For example, with the help of a PLC controller or industrial computer, combined with a gas flow controller, temperature sensor, oxygen concentration sensor and controller, the gas input and energy input of each chamber are adjusted according to real-time monitoring data to achieve "self-sustaining" combustion and safe operation.

[0075] In this invention, in the carbonization module 100, oxygen-rich air can be locally provided near the paper to be burned through a gas distribution device, causing it to burn rapidly and release heat, quickly raising the entire device to the paper carbonization temperature (e.g., 350-450℃), thus achieving a "self-sustaining" carbonization fly ash process. At the same time, the carbonization module 100 as a whole is kept in an oxygen-deficient state (e.g., oxygen concentration <20.9%), ensuring that a large amount of combustible gas / slag is generated for the ash module 200 to burn for heating and maintaining the "self-sustaining" temperature. This design can shorten the start-up time by more than 70% and reduce the installed power by 50%.

[0076] In this invention, after the carbonization module 100 reaches its self-sustaining temperature, external heating is stopped, and the carbonization rate is controlled solely by adjusting the overall combustion gas flow rate, while combustible gas / slag is supplied to the ashing module 200. After receiving the combustible gas / slag, the ashing module 200 adjusts the amount of oxygen-enriched gas (air with an oxygen concentration >21%) or air input to ensure that the heat released by combustion reaches the level required to maintain the ashing temperature (700-900℃), thus achieving self-sustaining operation.

[0077] In this invention, the control unit can dynamically adjust the gas input of each chamber based on feedback from the temperature sensor to ensure safe operation without exceeding the temperature limit.

[0078] II. This embodiment provides a method for the harmless disposal of paper, the method comprising:

[0079] The paper is subjected to rapid carbonization, self-sustaining carbonization, and self-sustaining ash formation in sequence.

[0080] The exhaust gas obtained from the self-sustaining ashing process is then subjected to gas washing and purification.

[0081] The rapid carbonization process includes feeding paper into the carbonization module 100, using a heating device, and introducing oxygen-enriched gas for localized oxygen-enriched heating, thereby raising the paper temperature to its ignition point.

[0082] In the rapid carbonization process, the oxygen concentration in the area where the paper is located in the carbonization module 100 is controlled to be ≥21%.

[0083] In the rapid carbonization process, the oxygen concentration in the non-ignition area (i.e., the area outside the paper) of the carbonization module 100 is controlled to be <20.9%.

[0084] The self-sustaining carbonization includes: when the temperature of the carbonization module 100 reaches the self-sustaining threshold, stopping the heating equipment and oxygen-enriched gas, and introducing air to maintain the self-sustaining threshold.

[0085] The self-sustaining threshold is 350-650℃, for example, it can be 350℃, 380℃, 410℃, 440℃, 470℃, 500℃, 530℃, 560℃, 590℃, 620℃ or 650℃, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0086] The self-sustaining ashing process includes: adjusting the gas input to maintain the ashing temperature of the ashing module 200, and stopping the electric heating.

[0087] The self-sustaining ashing process controls the ashing temperature to be 700-900℃, for example, it can be 700℃, 720℃, 740℃, 760℃, 780℃, 800℃, 820℃, 840℃, 860℃, 880℃ or 900℃, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0088] In this invention, when carrying out harmless disposal, the ashing module 200 can be preheated in advance, or carbonized before starting the ashing module 200.

[0089] III. To illustrate the paper harmless disposal device provided by the present invention, the following example is used for explanation:

[0090] Example 1

[0091] This embodiment provides a paper harmless disposal device, which includes:

[0092] The carbonization module 100, the ashing module 200, and the gas scrubbing module 300 are connected in sequence by pipelines.

[0093] The carbonization module 100 has a feeding port 110 at the top of its side and a first air inlet 120 at the bottom of its side.

[0094] The bottom of the carbonization module 100 is provided with a first oxygen-enriched gas inlet 130; the first oxygen-enriched gas inlet 130 is equipped with a first heater 140;

[0095] The ashing module 200 is provided with a second air inlet 210 at the bottom of its side;

[0096] The bottom of the ashing module 200 is provided with a second oxygen-enriched gas inlet 220; the second oxygen-enriched gas inlet 220 is equipped with a second heater 230;

[0097] The gas washing module 300 is equipped with a gas washing liquid module;

[0098] The paper harmless disposal device further includes: an air conveying module 400; the air conveying module 400 is connected to the first air inlet 120 and the second air inlet 210 respectively;

[0099] The paper harmless disposal device also includes: an oxygen-enriched gas supply module 500; the oxygen-enriched gas outlet of the oxygen-enriched gas supply module 500 is connected to the first oxygen-enriched gas inlet 130 and the second oxygen-enriched gas inlet 220 respectively.

[0100] The gas washing liquid module is equipped with a gas disperser 310 and a heat exchanger 320; the gas disperser 310 is submerged in the washing liquid of the gas washing liquid module; the gas washing module 300 is equipped with a cleaning gas outlet 330.

[0101] The specific usage process is as follows, please refer to the flowchart. Figure 2 :

[0102] ① Feeding: Paper is fed into carbonization module 100, and feeding port 110 is closed;

[0103] ② Preheating preparation: Start the ashing module 200 to heat to the preset ashing temperature (700℃) to prepare for receiving combustible gas / slag;

[0104] ③ Rapid carbonization: Start the carbonization module 100 to perform local oxygen-enriched heating, so that the paper is heated to the ignition point rapidly, generating combustible gas / slag and blowing it to the ashing module 200;

[0105] ④ Self-sustaining carbonization: After the temperature of the carbonization module 100 reaches the self-sustaining threshold (500℃), the electric heating stops, the oxygen-enriched gas is replaced by air, and the carbonization is maintained in a stable manner by adjusting the air intake.

[0106] ⑤ Self-sustaining ashing: After receiving combustible gas / slag, the ashing module 200 adjusts the amount of oxygen-enriched gas input to maintain the ashing temperature by releasing heat from combustion, and stops electric heating;

[0107] ⑥ Gas washing and purification: The exhaust gas from the ash removal module 200 is fed into the gas washing module 300 for washing, which retains the ash and purifies the gas before it is discharged.

[0108] ⑦ Cooling and purging: After the treatment is completed, increase the gas flow rate of the carbonization module 100 to purge the residue in each chamber, and then stop the machine after natural cooling.

[0109] Example 2

[0110] This embodiment provides a paper harmless disposal device, which includes:

[0111] The carbonization module 100, the ashing module 200, and the gas scrubbing module 300 are connected in sequence by pipelines.

[0112] The carbonization module 100 is provided with a feeding port 110 at the top and a first air inlet 120 at the bottom;

[0113] The bottom of the side of the carbonization module 100 is provided with a first oxygen-enriched gas inlet 130; the first oxygen-enriched gas inlet 130 is equipped with a first heater 140;

[0114] The ashing module 200 is provided with a second air inlet 210 at the bottom of its side;

[0115] The top of the ashing module 200 is provided with a second oxygen-enriched gas inlet 220; the second oxygen-enriched gas inlet 220 is equipped with a second heater 230;

[0116] The gas washing module 300 is equipped with a gas washing liquid module;

[0117] The paper harmless disposal device further includes: an air conveying module 400; the air conveying module 400 is connected to the first air inlet 120 and the second air inlet 210 respectively;

[0118] The paper harmless disposal device also includes: an oxygen-enriched gas supply module 500; the oxygen-enriched gas outlet of the oxygen-enriched gas supply module 500 is connected to the first oxygen-enriched gas inlet 130 and the second oxygen-enriched gas inlet 220 respectively.

[0119] The gas washing liquid module is equipped with a gas disperser 310 and a heat exchanger 320; the gas disperser 310 is submerged in the washing liquid of the gas washing liquid module; the gas washing module 300 is equipped with a cleaning gas outlet 330.

[0120] The specific usage process is as follows:

[0121] ① Feeding: Paper is fed into carbonization module 100, and feeding port 110 is closed;

[0122] ② Preheating preparation: Start the ashing module 200 to heat to the preset ashing temperature (500℃) to prepare for receiving combustible gas / slag;

[0123] ③ Rapid carbonization: Start the carbonization module 100 to perform local oxygen-enriched heating, so that the paper is heated to the ignition point rapidly, generating combustible gas / slag and blowing it to the ashing module 200;

[0124] ④ Self-sustaining carbonization: After the temperature of the carbonization module 100 reaches the self-sustaining threshold (350℃), the electric heating stops, the oxygen-enriched gas is replaced by air, and the carbonization is maintained in a stable manner by adjusting the air intake.

[0125] ⑤ Self-sustaining ashing: After receiving combustible gas / slag, the ashing module 200 adjusts the amount of oxygen-enriched gas input to maintain the ashing temperature by releasing heat from combustion, and stops electric heating;

[0126] ⑥ Gas washing and purification: The exhaust gas from the ash removal module 200 is fed into the gas washing module 300 for washing, which retains the ash and purifies the gas before it is discharged.

[0127] ⑦ Cooling and purging: After the treatment is completed, increase the gas flow rate of the carbonization module 100 to purge the residue in each chamber, and then stop the machine after natural cooling.

[0128] Example 3

[0129] This embodiment provides a paper harmless disposal device, which includes:

[0130] The carbonization module 100, the ashing module 200, and the gas scrubbing module 300 are connected in sequence by pipelines.

[0131] The carbonization module 100 has a feeding port 110 at the top of its side and a first air inlet 120 at the bottom of its side.

[0132] The bottom of the carbonization module 100 is provided with a first oxygen-enriched gas inlet 130; the first oxygen-enriched gas inlet 130 is equipped with a first heater 140;

[0133] The ashing module 200 is provided with a second air inlet 210 at the bottom of its side;

[0134] The bottom of the ashing module 200 is provided with a second oxygen-enriched gas inlet 220; the second oxygen-enriched gas inlet 220 is equipped with a second heater 230;

[0135] The gas washing module 300 is equipped with a gas washing liquid module;

[0136] The paper harmless disposal device further includes: an air conveying module 400; the air conveying module 400 is connected to the first air inlet 120 and the second air inlet 210 respectively;

[0137] The paper harmless disposal device also includes: an oxygen-enriched gas supply module 500; the oxygen-enriched gas outlet of the oxygen-enriched gas supply module 500 is connected to the first oxygen-enriched gas inlet 130 and the second oxygen-enriched gas inlet 220 respectively.

[0138] The gas washing liquid module is equipped with a gas disperser 310 and a heat exchanger 320; the gas disperser 310 is submerged in the washing liquid of the gas washing liquid module; the gas washing module 300 is equipped with a cleaning gas outlet 330.

[0139] The specific usage process is as follows:

[0140] ① Feeding: Paper is fed into carbonization module 100, and feeding port 110 is closed;

[0141] ② Preheating preparation: Start the ashing module 200 to heat to the preset ashing temperature (900℃) to prepare for receiving combustible gas / slag;

[0142] ③ Rapid carbonization: Start the carbonization module 100 to perform local oxygen-enriched heating, so that the paper is heated to the ignition point rapidly, generating combustible gas / slag and blowing it to the ashing module 200;

[0143] ④ Self-sustaining carbonization: After the temperature of the carbonization module 100 reaches the self-sustaining threshold (650℃), electric heating is stopped, oxygen-enriched gas is replaced with air, and the carbonization is maintained in a stable manner by adjusting the air intake.

[0144] ⑤ Self-sustaining ashing: After receiving combustible gas / slag, the ashing module 200 adjusts the amount of oxygen-enriched gas input to maintain the ashing temperature by releasing heat from combustion, and stops electric heating;

[0145] ⑥ Gas washing and purification: The exhaust gas from the ash removal module 200 is fed into the gas washing module 300 for washing, which retains the ash and purifies the gas before it is discharged.

[0146] ⑦ Cooling and purging: After the treatment is completed, increase the gas flow rate of the carbonization module 100 to purge the residue in each chamber, and then stop the machine after natural cooling.

[0147] Comparative Example 1

[0148] The only difference from Example 1 is that the atmosphere in the carbonization module 100 and the ashing module 200 is controlled to be a nitrogen atmosphere, that is, the process of the present invention is carried out in a nitrogen atmosphere. Specifically, nitrogen can be directly supplied through the first air inlet and the second air inlet.

[0149] Comparative Example 2

[0150] The only difference from Example 1 is that the first oxygen-enriched gas inlet 130 is not supplied with oxygen-enriched gas, but with air instead.

[0151] Comparative Example 3

[0152] The only difference from Example 1 is that no air is supplied to the first air inlet 120.

[0153] The paper was processed using the processes and apparatus described in the above embodiments and comparative examples, and the results are shown in Table 1 below.

[0154] Table 1

[0155]

[0156] In the table: Start-up time refers to the time it takes for both the carbonization chamber and the ashing chamber to reach the preset temperature.

[0157] As shown in Table 1, in the solutions provided by this invention, Examples 1-3 effectively ignite the combustible flue gas supplied by the carbonization module by controlling the preset temperature of the ashing module within the range of 500-800℃, allowing it to fully combust into CO2 and inorganic ash. Furthermore, the temperature of the ashing module should not be too low; for example, in Example 3, the ashing chamber temperature is set to 500℃ to receive the combustible flue gas supplied by the carbonization chamber. In the initial approximately 1-5 minutes, the combustible flue gas / ash cannot burn quickly and completely due to insufficient temperature, producing a certain tar odor; however, as the combustion temperature rises to a level sufficient for complete ashing, the tar odor disappears on its own.

[0158] In Comparative Example 1, the temperature scheme was set according to Example 1. After the air inlet was changed to nitrogen, it was found that the start-up time was significantly slower (>60min), the ashing process in the ashing module was not thorough, and the exhaust gas had a distinct tar smell. This indicates that relying solely on the oxygen supply from the oxygen-enriched port or the oxygen supplied by the air is seriously insufficient to meet the oxidation requirements of the paper, resulting in incomplete oxidation of the paper and a serious exceedance of the CO concentration (>50000ppm).

[0159] In Comparative Example 2, after replacing oxygen-enriched air with ordinary air, the start-up time was >60 minutes, and other phenomena were basically the same as in Example 1. This indicates that the introduction of oxygen enrichment can indeed significantly shorten the heating time and improve the start-up speed of the destruction device.

[0160] In Comparative Example 3, after the air supply to the first air inlet was removed, the start-up time was significantly prolonged, and the processing speed was significantly slower for the same amount of paper to be destroyed. The exhaust gas characteristics were consistent with those of Example 1. This indicates that while oxygen-enriched gas can accelerate paper combustion in the early stages, the total amount of oxygen it contains is insufficient to meet the paper's rapid heating requirements. Once the carbonization self-sustaining temperature is reached, replacing it with air is even less effective in meeting the paper's heating needs, resulting in a severe reduction in the start-up and destruction speed of the destruction device.

[0161] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0162] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0163] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A paper harmless disposal device, characterized in that, The paper harmless disposal device includes: The carbonization module, ashing module, and gas scrubbing module are connected sequentially by pipelines; The carbonization module is provided with a dispensing port on its side or top; The carbonization module is provided with a first air inlet and a first oxygen-enriched gas inlet; the first oxygen-enriched gas inlet is equipped with a first heater. The ashing module is provided with a second air inlet and a second oxygen-enriched gas inlet; the second oxygen-enriched gas inlet is equipped with a second heater. The gas washing module is equipped with a gas washing liquid module.

2. The paper harmless disposal device as described in claim 1, characterized in that, The paper harmless disposal device also includes: an air conveying module; Preferably, the air delivery module is connected to the first air inlet and the second air inlet, respectively.

3. The paper harmless disposal device as described in claim 1, characterized in that, The paper harmless disposal device also includes: an oxygen-enriched gas supply module; Preferably, the oxygen-enriched gas outlet of the oxygen-enriched gas supply module is connected to the first oxygen-enriched gas inlet and the second oxygen-enriched gas inlet, respectively.

4. The paper harmless disposal device as described in claim 1, characterized in that, The gas washing liquid module is equipped with a gas disperser and a heat exchanger. Preferably, the gas disperser is positioned below the washing liquid level of the gas-washing liquid module; Preferably, the air washing module is equipped with a cleaning air outlet.

5. The paper harmless disposal device as described in claim 1, characterized in that, The first oxygen-enriched gas inlet of the carbonization module is located at the bottom or side of the carbonization module, and the first air inlet is located at the bottom of the carbonization module. Preferably, the second oxygen-enriched gas inlet of the ashing module is located at the top or bottom of the ashing module, and the second air inlet is located on the side of the ashing module; Preferably, the paper harmless disposal device further includes a control unit.

6. A method for the harmless disposal of paper, characterized in that, The method for harmlessly disposing of paper includes: The paper is subjected to rapid carbonization, self-sustaining carbonization, and self-sustaining ash formation in sequence. The exhaust gas obtained from the self-sustaining ashing process is then subjected to gas washing and purification.

7. The paper harmless disposal method as described in claim 6, characterized in that, The rapid carbonization process includes feeding paper into a carbonization module, using a heating device, and introducing oxygen-enriched gas for localized oxygen-enriched heating, thereby raising the paper temperature to its ignition point.

8. The method for harmlessly disposing of paper as described in claim 7, characterized in that, In the rapid carbonization process, the oxygen concentration in the paper ignition area of ​​the carbonization module is controlled to be ≥21%; Preferably, the oxygen concentration in the non-ignition area of ​​the carbonization module is controlled to be <20.9% during the rapid carbonization process.

9. The method for harmlessly destroying paper as described in claim 6, characterized in that, The self-sustaining carbonization includes: when the temperature of the carbonization module reaches the self-sustaining threshold, stopping the heating equipment and oxygen-enriched gas, and introducing air to maintain the self-sustaining threshold; Preferably, the self-sustaining threshold is 350-650℃.

10. The method for harmlessly disposing of paper as described in claim 6, characterized in that, The self-sustaining ashing process includes: adjusting the gas input to maintain the ashing temperature of the ashing module and stopping the electric heating; Preferably, the ashing temperature in the self-sustaining ashing process is controlled at 700-900℃.

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