Method for adjusting a pyrolysis process with different media involvement

Abstract

The present application relates to the field of pyrolysis, and discloses a pyrolysis process adjustment method with different media participating, which realizes flexible adjustment of different pyrolysis working conditions through precise control of pipeline X, pipeline Y, pipeline Z, pipeline A and pipeline B, and pipeline M and multiple valves; the method comprises adjustment between air coal pyrolysis and pure oxygen coal pyrolysis, pyrolysis adjustment of different oxygen concentrations, and participation and regulation of other auxiliary media; pipeline M is designed to realize precise control of the combustion mixing ratio between multiple combustion-supporting gases and combustible gases, so as to meet the temperature field and atmosphere requirements of different pyrolysis reactions; through the present application, the pyrolysis mode can be flexibly selected according to production requirements, energy utilization efficiency is optimized, production cost is reduced, customized production of high-calorific-value coal gas and differentiated synthesis gas is realized, and the present application is widely applicable to the fields of coal chemical industry, waste treatment, metal smelting and energy recovery.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis technology, specifically to a method for adjusting a pyrolysis process involving different media. Background Technology

[0002] Pyrolysis technology, as a highly efficient energy conversion and resource utilization method, is widely used in the treatment of coal, organic waste, and chemical waste. In existing pyrolysis technologies, a single medium (such as pure oxygen or air) is typically used as the combustion-supporting gas for the pyrolysis reaction. However, a single pyrolysis method has certain limitations in practical applications and is difficult to adapt to diverse industrial needs.

[0003] Specifically, in the pure oxygen-based coal pyrolysis process, pure oxygen, due to its high combustion-supporting capacity, can produce high-calorific-value coal gas, and is therefore often used as a raw material for the production of chemical syngas. However, the cost of using pure oxygen is high, and it requires strict temperature field control of the equipment, making it difficult to promote in some scenarios that require low-cost operation. In contrast, air-based coal pyrolysis can provide coal gas with a lower calorific value, making it more economical as a fuel gas, but its lower calorific value makes it unsuitable for the production of high-quality syngas. Furthermore, with the continuous changes in industrial demands, it is necessary to flexibly adjust the oxygen concentration or introduce other auxiliary media (such as nitrogen, water vapor, carbon dioxide, etc.) during the pyrolysis process to achieve customized gas composition production, but existing equipment and processes often lack sufficient flexibility and precise control capabilities.

[0004] Existing pyrolysis equipment typically supports only a single medium or a fixed process flow, failing to achieve smooth regulation between different combustion-supporting gases (such as air and oxygen). This design not only limits the application range of the equipment but also easily leads to energy waste or increased production costs. Furthermore, during the regulation of different media, improper gas mixing ratios or cross-contamination issues in the pipelines often affect the stability and safety of the pyrolysis reaction. Current technologies have not adequately considered how to meet the needs of different industrial scenarios by optimizing medium regulation methods and gas mixing control. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for adjusting a pyrolysis process involving different media, which solves the problems of single media, inflexible adjustment, and difficulty in accurately controlling the gas mixing ratio in existing pyrolysis processes. This method can meet diverse industrial needs, improve energy efficiency, and reduce production costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for adjusting a pyrolysis process involving different media.

[0007] A pyrolysis process apparatus is provided, comprising pipes X, Y, Z, M, A, B, main pipe A, main pipe B, main pipe C, and a mixer, wherein:

[0008] Pipeline X is connected to main pipe A via a valve;

[0009] Pipeline Y is connected to main pipe B via a valve;

[0010] Pipeline Z is connected to main pipe C via a valve;

[0011] Pipeline M connects to pipes Y, Z, and B, and its on / off control is achieved through valves.

[0012] Pipe A is connected to pipe X, and pipe B is connected to pipe M;

[0013] Each main pipe is connected to a mixer, which mixes the input gas to form the target pyrolysis atmosphere;

[0014] Based on the target pyrolysis process requirements, the following operating conditions are regulated by adjusting the valve states on pipelines X, Y, Z, M, A, and B:

[0015] Regulation of air-fired coal pyrolysis and pure oxygen-fired coal pyrolysis;

[0016] Adjustment of pyrolysis atmosphere with different oxygen concentrations;

[0017] Adjustment of other pyrolysis methods;

[0018] During the pyrolysis process, the proportion of gas in each pipeline is adjusted by regulating the opening and closing status and opening degree of the valves, and the temperature field and composition of the target pyrolysis atmosphere are controlled.

[0019] Preferably, the state of adjusting the air-coal pyrolysis to pure oxygen-coal pyrolysis includes:

[0020] Under the air-coal pyrolysis condition:

[0021] The valve on pipe A is in the closed position;

[0022] The valve on pipe X is in the closed position;

[0023] The valve on pipeline Y is in the open position;

[0024] The valve on pipe M is in the closed position;

[0025] The valve on pipe B is in the closed position;

[0026] The valve on pipe Z is in the open position;

[0027] After adjustment, under pure oxygen coal pyrolysis conditions:

[0028] The valve on pipe A is in the closed position;

[0029] The valve on pipe X is in the open position;

[0030] The valve on pipeline Y is in the closed position;

[0031] The valve on pipe M is in the open position;

[0032] The valve on pipe B is in the closed position;

[0033] The valve on pipe Z is in the open position;

[0034] Pipeline M is used to adjust the ratio of oxygen to coal gas in the mixture to meet the temperature field requirements of pure oxygen coal pyrolysis.

[0035] In this state, the valve of pipeline M adjusts its opening degree to increase the flow rate of the gas heat carrier and optimize the pyrolysis reaction efficiency.

[0036] Preferably, the step of adjusting the pure oxygen coal pyrolysis to air coal pyrolysis includes:

[0037] Under pure oxygen coal pyrolysis conditions:

[0038] The valve on pipe A is in the closed position;

[0039] The valve on pipe X is in the open position;

[0040] The valve on pipeline Y is in the closed position;

[0041] The valve on pipe M is in the open position;

[0042] The valve on pipe B is in the closed position;

[0043] The valve on pipe Z is in the open position;

[0044] After adjustment, under air-coal pyrolysis conditions:

[0045] Pipeline Y supplies gas to main pipe B through a valve, and after mixing with coal gas, it participates in pyrolysis through a mixer.

[0046] Pipeline M is kept sealed to avoid cross-interference between the gas and air systems.

[0047] Preferably, the step of adjusting the pyrolysis atmosphere with different oxygen concentrations includes:

[0048] Based on pure oxygen coal pyrolysis or air coal pyrolysis, the opening degree of valves in pipeline A and pipeline B is adjusted.

[0049] The oxygen concentration is controlled to generate a differentiated pyrolysis atmosphere according to the pyrolysis requirements.

[0050] Preferably, the operating condition further includes:

[0051] Other inert gases or reactive gases are introduced to participate in the pyrolysis reaction or to control the pyrolysis atmosphere.

[0052] Preferably, the step of introducing other inert gases or reactive gases to participate in the pyrolysis reaction or to control the pyrolysis atmosphere includes:

[0053] Other inert gases or reactive gases are introduced through pipes A and B respectively;

[0054] Adjust the valve openings of pipes A and B to control the flow rate and mixing ratio of the media according to the requirements of different media participating in pyrolysis.

[0055] Preferably, the other inert gas or reactive gas includes nitrogen, water vapor, helium, or carbon dioxide.

[0056] Preferably, during the process of adjusting the air coal pyrolysis to pure oxygen coal pyrolysis, the valve of the pipeline M is controlled to maintain the sealing protection of the pipeline M in the adjusted state, and the pipeline M is filled with inert gas.

[0057] Preferably, the adjustment method is implemented through an automated control system, which includes:

[0058] The valve opening and closing real-time control module is used to control the valve status of pipelines X, Y, Z and M;

[0059] The oxygen concentration monitoring and feedback module is used to monitor the oxygen concentration in the mixed gas in real time and dynamically adjust the valve opening based on the feedback information.

[0060] The present invention also provides a pyrolysis process control system involving different media, comprising:

[0061] Pipe X is connected to main pipe A, and a third valve and a fourth valve are installed on pipe X;

[0062] Pipe Y is connected to main pipe B, and a fifth valve and a sixth valve are installed on pipe Y.

[0063] Pipe Z connects to main pipe C, and eleventh and twelfth valves are installed on pipe Z;

[0064] Pipe A is connected to pipe X, and a first valve and a second valve are installed on pipe A;

[0065] Pipeline B is connected to pipe M, and a seventh valve and an eighth valve are installed on pipe B;

[0066] Pipeline M is connected to pipeline Y at one end via a valve and to pipeline Z at the other end via a valve; pipeline M is equipped with valves number nine and ten.

[0067] The mixer, which is connected to main pipe A, main pipe B and main pipe C respectively, is used to mix oxygen, air, coal gas or other inert gas or reactive gas and introduce it into the pyrolysis system;

[0068] An automated control system is used to control the opening and closing state of the valve to achieve the regulation or mixing of oxygen, air, coal gas and other inert or reactive gases.

[0069] The pipe M is used to connect pipe Y and pipe Z, and the gas mixing ratio is adjusted by the valve to achieve the adjustment of different pyrolysis atmospheres;

[0070] Pipes A and B can be used to introduce other inert gases or reactive gases, and their flow rates and mixing ratios can be adjusted by the automated control system.

[0071] This invention provides a method for regulating a pyrolysis process involving different media. It offers the following advantages:

[0072] 1. This invention, through pipeline design and valve control, enables flexible adjustment between pyrolysis processes involving air-coal pyrolysis, pure oxygen-coal pyrolysis, and other auxiliary media, solving the problem of a single pyrolysis method in existing technologies. The design of pipeline M allows for rapid adjustment of the pyrolysis atmosphere under different operating conditions, meeting diverse industrial production needs and improving the adaptability and flexibility of the process.

[0073] 2. This invention, through the combined design of pipes A, B, and M, enables precise mixing control of the combustion-supporting gas (oxygen or air), the combustible gas (coal gas), and other auxiliary media. The opening and closing of different valves and the adjustment of their opening degrees allow for more precise control of gas flow and proportion, thereby optimizing the composition of the mixed gas under various reaction conditions. This precise mixing ratio control helps improve the efficiency of the pyrolysis reaction and the quality of the generated coal gas.

[0074] 3. This invention can effectively optimize the temperature field of the pyrolysis system under different pyrolysis conditions by adjusting the oxygen concentration or introducing auxiliary media, thereby improving energy utilization efficiency. For example, pure oxygen coal pyrolysis can rapidly increase the reaction temperature and improve the calorific value of the coal gas; in air coal pyrolysis, it can reduce oxygen consumption and save production costs. At the same time, by introducing media such as water vapor or carbon dioxide, carbon conversion efficiency can be further improved and energy waste can be reduced.

[0075] 4. During the operation adjustment process, this invention achieves sealed protection of inert gas (such as nitrogen) through pipeline M, effectively avoiding the risk of leakage or combustion when different gases are mixed. Simultaneously, the automated control system of this invention can monitor gas flow rate and ratio in real time and precisely adjust valve status, thereby ensuring the safety of the adjustment process and the stability of reaction conditions.

[0076] 5. This invention is applicable to multiple fields such as coal chemical industry, waste treatment, metal smelting, chemical production, and energy recovery. Its multi-process adjustment function and flexible gas ratio adjustment capability enable it to meet the specific requirements of pyrolysis atmosphere and product gas in different industrial scenarios, thus having broad prospects for promotion and application in multiple industries. Attached Figure Description

[0077] Figure 1 This is a schematic diagram of the adjustment process of the present invention;

[0078] Figure 2 This is a schematic diagram of the adjustment device of the present invention. Detailed Implementation

[0079] The technical solutions in 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.

[0080] Please see the appendix Figure 1 -Appendix Figure 2 This invention provides a method and apparatus for adjusting pyrolysis processes involving different media. By combining the apparatus with the process method, flexible adjustment between different pyrolysis media and the production of differentiated coal gas components can be achieved. It is applicable to industrial fields such as pyrolysis treatment of coal, organic waste, chemical waste and energy recovery.

[0081] like Figure 2 As shown, the pyrolysis process regulating device provided in this embodiment of the invention mainly includes pipes X, Y, Z, M, A, B, main pipe A, main pipe B, main pipe C, a mixer, and multiple control valves.

[0082] Pipeline X is used to transport pure oxygen, and one end of it is connected to main pipe A. Valves 3 and 4 are installed on pipeline X to control the main oxygen supply flow rate.

[0083] Specifically, valve 3 is used to control the main passage of pipeline X, and valve 4 serves as an auxiliary valve for further precise adjustment of oxygen flow.

[0084] Pipe A is connected to pipe X. Specifically, pipe A is connected to the side wall of pipe X, and other media such as nitrogen, water vapor, helium or carbon dioxide can be introduced through pipe A.

[0085] Pipeline A is equipped with valves 1 and 2, which are used to regulate the flow rate of other media entering the pyrolysis system through pipeline A. It should be noted that pipeline A provides independent pathways for the introduction of various auxiliary media, allowing for flexible selection of the media participating in the reaction under different pyrolysis conditions.

[0086] Pipe Y is used to transport air, and one end of it is connected to the main pipe B. Valves 5 and 6 are installed on pipe Y to regulate the air flow rate.

[0087] Specifically, valve 5 is the main control valve for pipeline Y, and valve 6 is an auxiliary valve used to more precisely control the air flow.

[0088] Pipeline Z is used to transport coal gas, and one end of it is connected to the main pipe C. Valves 11 and 12 are installed on pipeline Z to control the flow rate of coal gas.

[0089] Specifically, valve 11 is the main control valve of pipeline Z, and valve 12 is an auxiliary valve used to further regulate the gas flow.

[0090] Pipe M is connected at one end to pipe Y, with the connection point located between valve 6 and main pipe B. Pipe M allows for the connection or isolation of air and gas. The other end of pipe M is connected to pipe Z. Through the valve control of pipe M, flexible connection between pipe Z and pipe Y can be achieved.

[0091] Valves 9 and 10 are arranged on the pipeline M. In one possible implementation, the pipeline M can be used to disconnect the connection between the pipeline Y and the pipeline Z, thereby ensuring the safe isolation of the gas when adjusting the operating conditions.

[0092] Alternatively, when air and gas need to be mixed, valves 9 and 10 can be opened to achieve gas mixing. It should be noted that under certain regulating conditions, inert gas can be introduced between valves 9 and 10 in pipeline M to achieve a seal and prevent uneven gas mixing or leakage.

[0093] Pipe B is connected to pipe M. Specifically, pipe A is connected to the side wall of pipe X. Other media such as nitrogen, water vapor, helium or carbon dioxide can be introduced through pipe A.

[0094] Pipeline B is equipped with valves 7 and 8, which are used to control the flow rate and proportion of the medium entering pipeline M through pipeline B. Specifically, valve 7 is the main control valve, used to regulate the main passage of the medium into pipeline M; valve 8 is an auxiliary valve, used for precise flow regulation. It should be noted that other auxiliary media can be introduced into pipeline B under different operating conditions to adjust the mixed gas ratio.

[0095] Main pipes A, B, and C are each connected to two or more mixers to mix oxygen, air, gas, and other auxiliary media transported from different pipelines in a target ratio.

[0096] Specifically, the mixer connected to main pipe A receives gas from pipe X, the mixer connected to main pipe B receives gas from pipe Y under different pyrolysis conditions, and the mixer connected to main pipe C receives gas from pipe Z; through the mixer, different media can be fully mixed to generate the target atmosphere for use by the pyrolysis system.

[0097] This device is equipped with an automated control system for real-time adjustment and control of all valves on pipelines X, Y, Z, A, B, and M.

[0098] For example, the automated control system includes a gas flow monitoring module, an oxygen concentration control module, and a valve opening and closing adjustment module. Through the automated control system, the gas flow rate and mixing ratio of each pipeline can be dynamically adjusted according to process requirements, thereby achieving adjustment of the pyrolysis atmosphere under different operating conditions.

[0099] In some embodiments, the device may also introduce inert gases (such as nitrogen), water vapor, or other specific auxiliary media, and control their flow rates participating in the pyrolysis reaction by adjusting the valve openings of pipes A and B. For example, when it is necessary to adjust the temperature field or generate specific gas components, the required auxiliary media can be introduced into main pipe A or pipe M through pipes A and B, respectively.

[0100] It is understood that the device of this invention, through reasonable pipeline layout and valve settings, can not only achieve flexible adjustment of oxygen, air, and coal gas, but also introduce other auxiliary media through pipelines A and B, thereby meeting diverse pyrolysis process requirements. Simultaneously, through the design of pipeline M, this device can significantly improve the control accuracy of gas mixing ratios, optimize energy utilization efficiency, and reduce production costs.

[0101] The adjustment method of this invention is applicable to the flexible adjustment between air-fired coal pyrolysis and pure oxygen-fired coal pyrolysis, as well as pyrolysis reactions involving different oxygen concentrations and other auxiliary media. This invention achieves atmosphere adjustment and regulation under different pyrolysis conditions by controlling the opening and closing states of valves and combining this with the function of pipeline M. The method of this invention will be described in detail below with reference to the operating conditions of different working conditions.

[0102] The air coal pyrolysis was adjusted to a pure oxygen coal pyrolysis method.

[0103] Under this condition, the pyrolysis process is adjusted from the air coal pyrolysis state (state 1) to the pure oxygen coal pyrolysis state (state 2).

[0104] State 1 (Air-coal pyrolysis state):

[0105] Valves 1, 2, 3, 4, 7, 8, 9, and 10 are in the closed position;

[0106] Valves 5, 6, 11, and 12 are in the open position.

[0107] In this state, air enters main pipe B through pipe Y, and coal gas enters main pipe C through pipe Z. After the air and coal gas are mixed in the mixer, they participate in the pyrolysis reaction.

[0108] Pipeline M disconnects pipeline Z from pipeline Y via valves 9 and 10. Valves 9 and 10 are in an inert gas protective seal to prevent cross-influence between different gases.

[0109] State 2 (pure oxygen coal pyrolysis state):

[0110] Valves 5 and 6 are in the closed position;

[0111] Valves 3, 4, 9, and 10 are in the open position.

[0112] In this state, pure oxygen enters the main pipe A through pipe X and mixes with the coal gas in the mixer to supply the pyrolysis reaction.

[0113] In this state, the ratio of the mixed gas needs to be adjusted through pipe M to provide sufficient gaseous heat carrier to maintain the stability of the temperature field of the pyrolysis system.

[0114] It should be noted that the adjustment in this operating condition not only achieves efficient regulation of air-coal pyrolysis and pure oxygen-coal pyrolysis, but also optimizes the gas mixing ratio through the design of pipeline M, solving the problem that a single pyrolysis method cannot meet multiple needs.

[0115] Adjusting pure oxygen coal pyrolysis to air coal pyrolysis

[0116] In one possible implementation, the pyrolysis process is adjusted from the pure oxygen coal pyrolysis state (state 2) to the air coal pyrolysis state (state 3).

[0117] State 3 (Air-coal pyrolysis state):

[0118] Valves 1, 2, 3, 4, 7, 8, 9, and 10 are in the closed position;

[0119] Valves 5, 6, 11, and 12 are in the open position.

[0120] In this state, air enters the main pipe B through pipe Y and mixes with the coal gas in the mixer for the pyrolysis reaction.

[0121] It should be noted that, under this operating condition, the reaction conditions of the pyrolysis atmosphere can be effectively controlled by adjusting the mixing ratio of air and gas, thereby meeting different production needs.

[0122] Pyrolysis adjustment with different oxygen concentrations

[0123] In this invention, regardless of whether it is in the pure oxygen coal pyrolysis state (state 2) or the air coal pyrolysis state (state 3), the pyrolysis atmosphere with different oxygen concentrations can be adjusted by changing the valve openings of pipes X and Y. Specifically, this includes:

[0124] The opening degrees of valves 1 and 2 are adjusted by an automated control system to control the flow rate of oxygen or other auxiliary media introduced through pipeline A.

[0125] Adjust the opening of valves 7 and 8 to control the flow rate of air or other auxiliary media introduced through pipe B;

[0126] According to production needs, the oxygen concentration is adjusted to the range of 0%-100% to form a pyrolysis atmosphere with the target oxygen concentration.

[0127] For example, when a higher reaction temperature is required, the oxygen concentration can be increased; when it is necessary to save energy or control the reaction rate, the oxygen concentration can be decreased.

[0128] Other pyrolysis reactions

[0129] In another possible implementation, nitrogen, water vapor, helium, or carbon dioxide can be introduced through pipes A and B to participate in the pyrolysis reaction. Specifically, this includes:

[0130] Under conditions one, two, or three, the flow rate of other media is adjusted through valves 1 and 2 on pipeline A;

[0131] At the same time, the mixing ratio of other media with air or oxygen is adjusted through valves 7 and 8 on pipeline B;

[0132] The opening degree of the valves is adjusted according to actual production needs through an automated control system to ensure that the target medium mixes with oxygen or air to form a suitable pyrolysis atmosphere.

[0133] It should be noted that by introducing other media, the production of differentiated coal gas components can be further achieved. For example, the participation of water vapor can increase the hydrogen content in the gas; the participation of nitrogen can achieve a low-oxygen protective atmosphere; and the participation of carbon dioxide can be used to improve carbon conversion efficiency.

[0134] It is understood that the adjustment method provided by this invention, through reasonable valve control and pipeline M design, achieves efficient adjustment between air coal pyrolysis, pure oxygen coal pyrolysis, pyrolysis with different oxygen concentrations, and other auxiliary media involved in pyrolysis. It can flexibly adjust the pyrolysis atmosphere according to production needs, thereby optimizing energy use, reducing production costs, and meeting the needs of various industrial application scenarios.

[0135] To better understand the present invention, the above method will be described in detail below with reference to specific embodiments.

[0136] Example 1: Adjusting air-fired coal pyrolysis to pure oxygen-fired coal pyrolysis

[0137] In coal chemical production, when it is necessary to increase the calorific value of coal gas for syngas production (such as feedstock gas for hydrogen or methanol synthesis), a process of adjusting air-coal pyrolysis to pure oxygen-coal pyrolysis can be adopted. This process allows for adjustments to the supply of the gas heat carrier according to production needs, thereby improving the quality of the produced gas.

[0138] 1. State 1: Air-coal pyrolysis state

[0139] Valve status: Valves 1, 2, 3, 4, 7, 8, 9, and 10 are closed; Valves 5, 6, 11, and 12 are open.

[0140] Operating conditions:

[0141] Air enters the main pipe B through pipe Y, and mixes with coal gas in the mixer through the main pipe C. The mixture is then pyrolyzed to form low-calorific-value coal gas for use in downstream processes.

[0142] Pipeline M disconnects the connection between pipeline Y and pipeline Z through valves 9 and 10. Inert gas is kept between valves 9 and 10 to prevent cross-mixing of gases.

[0143] 2. State 2: Pure oxygen coal pyrolysis state

[0144] Valve status: Valves 1, 2, 5, and 6 are closed; Valves 3, 4, 9, 10, 11, and 12 are open.

[0145] Operating conditions:

[0146] Oxygen enters the main pipe A through pipe X, mixes with the coal gas in the mixer, and pyrolyzes to produce high-calorific-value coal gas.

[0147] Pipeline M adjusts the gas ratio to ensure stable pyrolysis reaction conditions at high temperature.

[0148] Example 2: Adjusting pure oxygen coal pyrolysis to air coal pyrolysis

[0149] In the process of solid waste resource utilization, such as the pyrolysis treatment of municipal solid waste or industrial waste, pure oxygen coal pyrolysis is usually used initially for rapid heating to improve pyrolysis efficiency. Once the reaction stabilizes, to reduce oxygen consumption and costs, the process can be switched to air coal pyrolysis to maintain continuous operation.

[0150] 1. State 2: Pure oxygen coal pyrolysis state

[0151] Valve status: Valves 5 and 6 are closed; Valves 3, 4, 9, and 10 are open.

[0152] Operating conditions:

[0153] Pure oxygen enters the main pipe A through pipe X, and mixes with coal gas in the mixer through the main pipe C for high-temperature rapid pyrolysis of solid waste.

[0154] Pipeline M connects to pipeline Z, pipeline Y, and pipeline B to ensure stable gas delivery.

[0155] 2. State 3: Air-coal pyrolysis state

[0156] Valve status: Valves 1, 2, 3, 4, 7, 8, 9, and 10 are closed; Valves 5, 6, 11, and 12 are open.

[0157] Operating conditions:

[0158] Air enters the main pipe B through pipe Y and mixes with coal gas in a mixer to maintain the regular operation of waste pyrolysis.

[0159] The process cost is significantly reduced, meeting the economic requirements for long-term operation.

[0160] Example 3: Pyrolysis with different oxygen concentrations and pyrolysis involving auxiliary media

[0161] In applications requiring the production of specific gas components, such as providing a reducing atmosphere with high hydrogen content for metal smelting processes or providing differentiated syngas for the chemical industry, different atmosphere requirements can be met by adjusting the oxygen concentration and introducing auxiliary media (such as water vapor, nitrogen, carbon dioxide, etc.).

[0162] 1. Initial state

[0163] Valve status: Adjust the opening of valves 1, 2, 7, and 8 according to the target atmosphere requirements to control the oxygen concentration or the proportion of auxiliary media involved.

[0164] 2. Oxygen concentration regulation

[0165] If a high oxygen concentration is required:

[0166] Adjust the opening of valves 3 and 4 in pipeline X to increase the pure oxygen flow rate;

[0167] Close valves 5 and 6 in pipeline Y to reduce the air ratio;

[0168] Introduce an appropriate amount of auxiliary medium (such as water vapor) through pipe A or B to further regulate the atmosphere.

[0169] If a low oxygen concentration is required:

[0170] Reduce the opening degree of valves 3 and 4 in pipeline X;

[0171] Increase the opening degree of valves 5 and 6 in pipeline Y to increase the air ratio;

[0172] Nitrogen or carbon dioxide is introduced through pipe A for dilution.

[0173] 3. Auxiliary media involved

[0174] Nitrogen, water vapor, carbon dioxide and other media are introduced through valves 1 and 2 of pipeline A;

[0175] The mixing ratio is adjusted by valves 7 and 8 on pipe B to create the desired atmosphere with oxygen or air;

[0176] Adjust the ratio of oxygen to auxiliary media to meet production needs.

[0177] 4. Operating Conditions

[0178] By adjusting the oxygen concentration, high-calorific-value gases can be generated to create a reducing atmosphere for metal smelting.

[0179] The hydrogen content in coal gas can be increased by introducing water vapor, which can then be used to synthesize hydrogen.

[0180] Involving carbon dioxide can improve carbon conversion efficiency and is suitable for resource utilization applications.

[0181] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for regulating a pyrolysis process involving different media, characterized in that, Includes the following steps: A pyrolysis process apparatus is provided, comprising pipes X, Y, Z, M, A, B, main pipe A, main pipe B, main pipe C, and a mixer, wherein: Pipeline X is used to transport pure oxygen and is connected to main pipe A via a valve; Pipe Y is used to transport air and is connected to main pipe B via a valve; Pipeline Z is used to transport coal gas and is connected to the main pipe C via a valve; Pipe M is connected between pipes Y, B and Z, and its on / off control is achieved through valves; Pipe A is used to introduce auxiliary medium and is connected to pipe X; pipe B is used to introduce auxiliary medium and is connected to pipe M. Each main pipe is connected to a mixer, which mixes the input gas to form the target pyrolysis atmosphere; Based on the target pyrolysis process requirements, the following operating conditions are regulated by adjusting the valve states on pipes X, Y, Z, M, A, and B: It can be adjusted to the air-coal pyrolysis state under any condition; It can be adjusted to a pure oxygen coal pyrolysis state under any condition; It can be adjusted to different oxygen concentration pyrolysis states under any conditions; It can be adjusted to other pyrolysis states under any condition; During the pyrolysis process, the proportion of gas in each pipeline is adjusted by regulating the opening and closing status and opening degree of the valves, and the temperature field and composition of the target pyrolysis atmosphere are controlled.

2. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, Any of the aforementioned states can be adjusted to the air-coal pyrolysis state: Under the air-coal pyrolysis condition: The valve on pipe A is in the closed position; The valve on pipe X is in the closed position; The valve on pipeline Y is in the open position; The valve on pipe M is in the closed position; The valve on pipe B is in the closed position; The valve on pipe Z is in the open position; It can be adjusted to a pure oxygen coal pyrolysis state under any condition: The valve on pipe A is in the closed position; The valve on pipe X is in the open position; The valve on pipeline Y is in the closed position; The valve on pipe M is in the open position; The valve on pipe B is in the closed position; The valve on pipe Z is in the open position; After adjustment, under pure oxygen coal pyrolysis conditions: Pipeline M is used to adjust the ratio of oxygen to coal gas in the mixture to meet the temperature field requirements of pure oxygen coal pyrolysis. In this state, the valve on pipe M adjusts its opening to increase the flow rate of the gas heat carrier and optimize the pyrolysis reaction efficiency. It can be adjusted to different oxygen concentration pyrolysis states under any conditions; The valve on pipe A is in the closed position; The valve on pipe B is in the closed position; The valve on pipe M is in the closed position; The valve on pipe X is in the open position; The valve on pipeline Y is in the open position; The valve on pipe Z is in the open position; It can be adjusted to other pyrolysis states under any condition; The valve on pipe M is in the closed position; All other valves are in the open position.

3. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, The steps for adjusting the pyrolysis state of pure oxygen coal to the pyrolysis state of air coal include: Under pure oxygen coal pyrolysis conditions: The valve on pipe A is in the closed position; The valve on pipe X is in the open position; The valve on pipeline Y is in the closed position; The valve on pipe M is in the open position; The valve on pipe B is in the closed position; The valve on pipe Z is in the open position; Adjusted to the air-coal pyrolysis state: Pipeline Y supplies gas to main pipe B by opening a valve. After mixing with coal gas, the gas is pyrolyzed through a mixer. The valves on pipes M and A are closed to avoid cross-interference between different media.

4. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, The steps for adjusting to the different oxygen concentration pyrolysis states include: Based on the pure oxygen coal pyrolysis state or the air coal pyrolysis state, the pyrolysis mode can be adjusted to different media by adjusting the opening of the valves in pipeline A and pipeline B. Depending on the pyrolysis requirements, different medium concentrations are controlled to generate differentiated pyrolysis atmospheres.

5. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, The operating conditions also include: Other inert gases or reactive gases are introduced to participate in the pyrolysis reaction or to control the pyrolysis atmosphere.

6. The method for adjusting a pyrolysis process involving different media according to claim 5, characterized in that, The step of introducing other inert gases or reactive gases to participate in the pyrolysis reaction or to control the pyrolysis atmosphere includes: Other inert gases or reactive gases are introduced through pipes A and B respectively; Adjust the valve openings of pipes A and B to control the flow rate and mixing ratio of the media according to the requirements of different media participating in pyrolysis.

7. The method for adjusting a pyrolysis process involving different media according to claim 6, characterized in that, The other inert or reactive gases include nitrogen, water vapor, helium, or carbon dioxide.

8. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, During the process of adjusting from the air-coal pyrolysis state to the pure oxygen-coal pyrolysis state, the valves on pipeline M are kept closed for sealing protection through valve control on pipeline M.

9. The method for adjusting a pyrolysis process involving different media according to claim 1, characterized in that, The adjustment method is implemented through an automated control system, which includes: The valve opening and closing real-time control module is used to control the valve status of pipelines X, Y, Z and M; The oxygen concentration monitoring and feedback module is used to monitor the oxygen concentration in the mixed gas in real time and dynamically adjust the valve opening based on the feedback information.

10. A pyrolysis process control system involving different media, based on the pyrolysis process control method involving different media as described in any one of claims 1-9, characterized in that, include: Pipe X is connected to main pipe A, and a third valve and a fourth valve are installed on pipe X; Pipe Y is connected to main pipe B, and a fifth valve and a sixth valve are installed on pipe Y. Pipe Z connects to main pipe C, and eleventh and twelfth valves are installed on pipe Z; Pipe A is connected to pipe X, and a first valve and a second valve are installed on pipe A; Pipeline B is connected to pipe M, and a seventh valve and an eighth valve are installed on pipe B; Pipe M is connected to pipe Y at one end via a valve and to pipe Z at the other end via a valve; pipe M is equipped with a ninth valve and a tenth valve; The mixers, which are connected to main pipes A, B, and C respectively, are used to mix oxygen, air, coal gas, or other inert or reactive gases and introduce them into the pyrolysis system. An automated control system is used to control the opening and closing status of the first to twelfth valves to achieve the regulation or mixing of oxygen, air, coal gas and other inert or reactive gases; Pipe M is used to connect pipe Y and pipe Z, and the gas mixing ratio is adjusted by the ninth valve and the tenth valve to achieve the adjustment of different pyrolysis atmospheres; Pipes A and B can be used to introduce other inert gases or reactive gases, and their flow rates and mixing ratios can be adjusted by the automated control system.

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