Pyrolysis process adjusting method with participation of different media

Abstract

The invention relates to the field of pyrolysis, and discloses a pyrolysis process adjusting method with participation of different media, and by arranging a pipeline X, a pipeline Y, a pipeline Z, a pipeline A and a pipeline B, and accurately controlling a pipeline M and a plurality of valves, flexible adjustment of different pyrolysis working conditions is realized; the method comprises the steps of adjustment between air coal pyrolysis and pure oxygen coal pyrolysis, pyrolysis adjustment of different oxygen concentrations and control participation of other auxiliary media. Due to the design of the pipeline M, accurate control over the combustion mixing proportion between various combustion-supporting gases and combustible gases can be achieved, and the temperature field and atmosphere requirements of different pyrolytic reactions are met; by means of the system and method, the pyrolysis mode can be flexibly selected according to production requirements, the energy utilization efficiency is optimized, the production cost is reduced, meanwhile, customized production of high-calorific-value coal gas and differentiated synthesis gas is achieved, and the system and method are widely applied to the fields of coal chemical industry, waste treatment, metal smelting, energy recovery and the like.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis, in particular to a method for regulating a pyrolysis process involving different media. Background Art

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

[0003] Specifically, in the process of coal pyrolysis with the participation of pure oxygen, pure oxygen is often used as a raw material for the production of chemical synthesis gas because it has a high combustion-supporting ability and can produce high calorific value coal gas. However, the cost of using pure oxygen is high, and the temperature field control of the device is strictly required, which is difficult to promote in certain scenarios that require low-cost operation. In contrast, coal pyrolysis with the participation of air can provide coal gas with a lower calorific value, which is more economical to use as a fuel gas, but because of its low calorific value, it is not suitable for the production of high-quality synthesis gas. In addition, with the continuous changes in industrial needs, 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 component production, but existing devices and processes often lack sufficient flexibility and precise control capabilities.

[0004] Existing pyrolysis devices usually only support the use of a single medium or a fixed process flow, and cannot achieve smooth adjustment between different combustion-supporting gases (such as air and oxygen). This design not only limits the scope of application of the device, but also easily leads to energy waste or increased production costs. In addition, in the process of adjusting different media, the stability and safety of the pyrolysis reaction are often affected by improper mixing ratios of pipeline gases or cross-contamination problems. The existing technology has not fully considered how to meet the needs of different industrial scenarios by optimizing the medium adjustment method and gas mixing control. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for regulating a pyrolysis process involving different media, which solves the problems of single medium, inflexible regulation and difficulty in precise control of the gas mixing ratio in the existing pyrolysis process, thereby meeting diversified industrial needs, improving energy utilization efficiency and reducing production costs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical scheme: a method for regulating a pyrolysis process involving different media.

[0007] A pyrolysis process device is provided, including pipeline X, pipeline Y, pipeline Z, pipeline M, pipeline A, pipeline B, main pipe A, main pipe B, main pipe C and a mixer, wherein:

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

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

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

[0011] Pipeline M is connected between pipeline Y, pipeline Z and pipeline B, and the on-off control is realized through the valve;

[0012] Pipeline A is connected to pipeline X, and pipeline B is connected to pipeline M;

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

[0014] According to the target pyrolysis process requirements, by adjusting the valve states on pipeline X, pipeline Y, pipeline Z, pipeline M, pipeline A and pipeline B, the following operating conditions can be adjusted:

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

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

[0017] Regulation of other pyrolysis methods;

[0018] During the pyrolysis process, the ratio of gases in each pipeline is adjusted by adjusting the opening and closing state and opening degree of the valve, 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 air-coal pyrolysis state:

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

[0022] The valve on pipeline X is in closed state;

[0023] The valve on pipe Y is open;

[0024] The valve on pipeline M is in closed state;

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

[0026] The valve on pipe Z is open;

[0027] After adjustment, in the pure oxygen coal pyrolysis state:

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

[0029] The valve on pipe X is open;

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

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

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

[0033] The valve on pipe Z is open;

[0034] Pipeline M is used to adjust the ratio of the mixed gas of oxygen and coal gas to meet the temperature field requirements of pure oxygen coal pyrolysis;

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

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

[0037] In the pure oxygen coal pyrolysis state:

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

[0039] The valve on pipe X is open;

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

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

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

[0043] The valve on pipe Z is open;

[0044] After adjustment, in the air-coal pyrolysis state:

[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] Pipe M remains sealed to avoid cross interference between the gas and air systems.

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

[0048] On the basis of pure oxygen coal pyrolysis or air coal pyrolysis, by adjusting the opening of the valve of pipeline A and the valve of pipeline B;

[0049] According to the pyrolysis requirements, the oxygen concentration is controlled to generate differentiated pyrolysis atmosphere.

[0050] Preferably, the operating state also includes:

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

[0052] Preferably, the step of introducing other inert gas or reaction gas to participate in the pyrolysis reaction or to regulate the pyrolysis atmosphere comprises:

[0053] Other inert gases or reaction gases are introduced through pipeline A and pipeline B respectively;

[0054] Adjust the valve opening of pipeline A and pipeline B to control the flow rate and mixing ratio of the medium 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 by an automated control system, which includes:

[0058] Valve opening and closing real-time control module, used to control the valve status of pipeline X, pipeline Y, pipeline Z and pipeline 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 according to the feedback information.

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

[0061] A pipeline X connected to the main pipe A, and a third valve and a fourth valve are provided on the pipeline X;

[0062] A pipeline Y connected to the main pipe B, and a fifth valve and a sixth valve are provided on the pipeline Y;

[0063] A pipeline Z connected to the main pipe C, and an eleventh valve and a twelfth valve are provided on the pipeline Z;

[0064] Pipeline A is connected to pipeline X, and a first valve and a second valve are provided on pipeline A;

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

[0066] Pipeline M, one end of which is connected to pipeline Y through a valve, and the other end of which is connected to pipeline Z through a valve; valves No. 9 and No. 10 are provided on pipeline M;

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

[0068] An automatic control system for controlling the opening and closing state of the valve to achieve regulation or mixing of oxygen, air, coal gas and other inert gases or reaction gases;

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

[0070] The pipeline A and the pipeline B can be fed with other inert gases or reactive gases, and the flow rate and the mixing ratio thereof can be adjusted by the automatic control system.

[0071] The present invention provides a method for regulating a pyrolysis process involving different media. It has the following beneficial effects:

[0072] 1. The present invention can achieve flexible adjustment between air coal pyrolysis, pure oxygen coal pyrolysis and pyrolysis processes involving other auxiliary media through pipeline design and valve control, solving the problem of single pyrolysis mode in the prior art. Through the design of pipeline M, the pyrolysis atmosphere can be quickly adjusted under different working conditions to meet various industrial production needs and improve the adaptability and flexibility of the process.

[0073] 2. The present invention can realize accurate mixing control of combustion-supporting gas (oxygen or air) and combustible gas (coal gas) and other auxiliary media through the combined design of pipeline A, pipeline B and pipeline M. The opening and closing and opening adjustment of different valves make the flow rate and ratio of gas more accurate, thereby optimizing the composition of mixed gas under various reaction conditions. This precise mixing ratio control helps to improve the efficiency of pyrolysis reaction and the quality of generated coal gas.

[0074] 3. The present 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 quickly increase the reaction temperature and the calorific value of coal gas; during air coal pyrolysis, oxygen consumption can be reduced, saving production costs. At the same time, by introducing media such as water vapor or carbon dioxide, the carbon conversion efficiency can be further improved and energy waste can be reduced.

[0075] 4. In the process of adjusting the working condition, the present invention realizes the sealing protection of the inert gas (such as nitrogen) through the pipeline M, which can effectively avoid the risk of leakage or combustion when different gases are mixed. At the same time, the automatic control system of the present invention can monitor the gas flow and ratio in real time and accurately adjust the valve state, thereby ensuring the safety of the adjustment process and the stability of the reaction conditions.

[0076] 5. The present invention can be applied 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 promotion and application prospects in multiple industries. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0078] Figure 2 It is a schematic diagram of the regulating device of the present invention. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0080] Please see attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a method and device for regulating a pyrolysis process involving different media. By combining the device with the process method, flexible regulation between different pyrolysis media and production of differentiated coal gas components are achieved, which is suitable for industrial fields such as pyrolysis treatment and energy recovery of coal, organic waste, and chemical waste.

[0081] like Figure 2 As shown, the pyrolysis process regulating device provided in the embodiment of the present invention mainly includes pipeline X, pipeline Y, pipeline Z, pipeline M, pipeline A, pipeline 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 the pipeline is connected to the main pipe A. Valves 3 and 4 are arranged on pipeline X to control the main supply flow of oxygen.

[0083] Specifically, valve 3 is used to control the main passage of pipeline X, and valve 4 is used as an auxiliary valve to further accurately adjust the oxygen flow rate.

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

[0085] Pipeline A is provided with valves 1 and 2 for regulating the flow of other media into the pyrolysis system through pipeline A. It should be noted that pipeline A provides an independent passage for the introduction of a variety of auxiliary media, and the media participating in the reaction can be flexibly selected according to demand under different pyrolysis conditions.

[0086] Pipeline Y is used to transport air, and one end of the pipeline is connected to the main pipe B. Valves 5 and 6 are arranged on pipeline Y to adjust the transport flow of air.

[0087] Specifically, valve 5 is the main control valve of pipeline Y, and valve 6 is an auxiliary valve for more accurately controlling the air flow.

[0088] The pipeline Z is used to transport coal gas, and one end of the pipeline Z is connected to the main pipe C. The pipeline Z is provided with valves 11 and 12 for controlling the transport flow of the coal gas.

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

[0090] One end of the pipeline M is connected to the pipeline Y, and the connection position is located between the valve 6 and the main pipe B. The connection or isolation of air and gas can be achieved through the pipeline M. The other end of the pipeline M is connected to the pipeline Z. Through the valve control of the pipeline M, the flexible connection between the pipeline Z and the pipeline Y can be achieved.

[0091] The pipeline M is provided with valves 9 and 10. In a possible implementation, the pipeline M can be used to cut off the connection between the pipeline Y and the pipeline Z, thereby ensuring safe isolation of the gas when adjusting the working conditions;

[0092] As an option, when it is necessary to mix air and gas, valves 9 and 10 can be opened to achieve gas mixing. It should be noted that under certain adjustment conditions, inert gas can be filled between valves 9 and 10 of pipeline M to achieve sealing protection to prevent uneven gas mixing or leakage.

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

[0094] Pipeline B is provided 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, which is used to adjust the main passage of the medium entering pipeline M; valve 8 is an auxiliary valve, which is used to accurately adjust the flow rate. It should be noted that pipeline B can introduce other auxiliary media to adjust the mixed gas ratio under different working conditions.

[0095] The main pipe A, the main pipe B and the main pipe C are respectively connected to two or more mixers for mixing oxygen, air, coal gas and other auxiliary media transported by different pipelines according to a target ratio.

[0096] Specifically, the mixer connected to the main pipe A receives gas from pipeline X, the mixer connected to the main pipe B receives gas from pipeline Y under different pyrolysis modes, and the mixer connected to the main pipe C receives gas from pipeline Z; through the mixer, sufficient mixing of different media can be achieved to generate a target atmosphere for use in the pyrolysis system.

[0097] The device is equipped with an automatic control system for real-time regulation and control of all valves on pipeline X, pipeline Y, pipeline Z, pipeline A, pipeline B and pipeline M.

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

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

[0100] It can be understood that the device of the present invention can not only realize the flexible adjustment of oxygen, air and coal gas through reasonable pipeline layout and valve setting, but also introduce other auxiliary media through pipeline A and pipeline B, so as to meet the diversified pyrolysis process requirements. At the same time, through the design of pipeline M, the device can significantly improve the control accuracy of gas mixing ratio, optimize energy utilization efficiency and reduce production costs.

[0101] The regulation method of the present invention is suitable for realizing flexible regulation between air coal pyrolysis and pure oxygen coal pyrolysis, as well as pyrolysis with different oxygen concentrations and pyrolysis reactions involving other auxiliary media. The present invention realizes atmosphere adjustment and regulation under different pyrolysis conditions by controlling the opening and closing state of the valve and combining the function of the pipeline M. The method of the present invention is described in detail below in combination with the operating conditions of different working conditions.

[0102] Air coal pyrolysis is adjusted to pure oxygen coal pyrolysis mode.

[0103] Under this operating 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 state;

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

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

[0108] Pipeline M cuts off the connection between pipeline Z and pipeline Y through valves 9 and 10. Valves 9 and 10 are in an inert gas protection sealing state to prevent cross-influence between different gases.

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

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

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

[0112] In this state, pure oxygen enters the main pipe A through the pipeline X and is mixed with the coal gas in the mixer for pyrolysis reaction.

[0113] In this state, it is necessary to adjust the ratio of the mixed gas through the pipeline M to provide sufficient gas heat carrier to maintain the stability of the temperature field of the pyrolysis system.

[0114] It should be noted that the adjustment of this working condition not only realizes the efficient adjustment 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] Pure oxygen coal pyrolysis is adjusted to air coal pyrolysis mode

[0116] In a possible implementation, the pyrolysis process is adjusted from a pure oxygen coal pyrolysis state (state 2) to an 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 state;

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

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

[0121] It should be noted that, under the present working condition, by adjusting the mixing ratio of air and coal gas, the reaction conditions of the pyrolysis atmosphere can be effectively controlled to meet different production requirements.

[0122] Pyrolysis adjustment for different oxygen concentrations

[0123] In the present invention, whether 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 adjusting the valve openings of pipeline X and pipeline Y. Specifically, it includes:

[0124] The opening of valves 1 and 2 is adjusted by the automatic control system to control the flow of oxygen or other auxiliary media introduced into pipeline A;

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

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

[0127] For example, when a higher reaction temperature is required, the oxygen concentration can be increased; when energy saving or reaction speed control is required, the oxygen concentration can be reduced.

[0128] Other pyrolysis reactions

[0129] In another possible implementation, nitrogen, water vapor, helium or carbon dioxide and other media may be introduced through pipeline A and pipeline B to participate in the pyrolysis reaction. Specifically, the following are included:

[0130] Under condition 1, condition 2 or condition 3, the flow of other media is adjusted through valves 1 and 2 of pipeline A;

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

[0132] Through the automatic control system, the opening of the above valves is adjusted according to actual production needs to ensure that the target medium is mixed with oxygen or air to form a suitable pyrolysis atmosphere.

[0133] It should be noted that the production of differentiated coal gas components can be further achieved by introducing other media. 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 can be understood that the regulation method provided by the present invention realizes efficient regulation among air coal pyrolysis, pure oxygen coal pyrolysis, pyrolysis with different oxygen concentrations and pyrolysis involving other auxiliary media through reasonable valve control and design of pipeline M, and 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] In order to better understand the present invention, the above method is described in detail below in conjunction with specific embodiments.

[0136] Example 1: Air coal pyrolysis adjusted to pure oxygen coal pyrolysis

[0137] In coal chemical production, when the calorific value of coal gas needs to be increased for synthesis gas production (such as hydrogen or methanol synthesis feed gas), a process of adjusting air coal pyrolysis to pure oxygen coal pyrolysis can be used. This process can adjust the supply of gas heat carrier according to production needs, thereby achieving the purpose of improving the quality of gas production.

[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] Working conditions description:

[0141] The air enters the main pipe B through the pipe Y, and is mixed with the coal gas through the main pipe C in the mixer, where it is pyrolyzed to form low calorific value coal gas for use in downstream processes.

[0142] Pipeline M cuts off the connection between pipeline Y and pipeline Z through valves 9 and 10. Inert gas is kept sealed 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] Working conditions description:

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

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

[0148] Example 2: Pure oxygen coal pyrolysis adjusted to air coal pyrolysis

[0149] In the process of solid waste resource utilization, such as pyrolysis treatment of domestic waste or industrial waste, pure oxygen coal pyrolysis is usually used initially to quickly increase the temperature to improve the pyrolysis efficiency. When the reaction is stable, in order to reduce oxygen consumption and cost, it can be adjusted to air coal pyrolysis to maintain the continuous operation of the treatment process.

[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] Working conditions description:

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

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

[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] Working conditions description:

[0158] The air enters the main pipe B through the pipe Y and is mixed with the coal gas in the mixer to maintain the normal operation of the waste pyrolysis.

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

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

[0161] In application scenarios where specific gas components need to be produced, such as providing a reducing atmosphere with a high hydrogen content for metal smelting processes, or providing differentiated synthesis gas 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: According to the target atmosphere requirements, adjust the opening of valves 1, 2, 7, and 8 to control the oxygen concentration or the proportion of auxiliary medium.

[0164] 2. Oxygen concentration adjustment

[0165] If high oxygen concentrations are 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 on pipeline Y to reduce the air ratio;

[0168] An appropriate amount of auxiliary medium (such as water vapor) is introduced through pipeline A or B to further adjust the atmosphere.

[0169] If low oxygen concentrations are required:

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

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

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

[0173] 3. Auxiliary medium participation

[0174] Introduce nitrogen, water vapor, carbon dioxide and other media through valves 1 and 2 of pipeline A;

[0175] Adjust the mixing ratio through valves 7 and 8 of pipeline B to form the desired atmosphere with oxygen or air;

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

[0177] 4. Working conditions description

[0178] By adjusting the oxygen concentration, high calorific value gas can be generated for the reducing atmosphere of metal smelting;

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

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

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

Claims

1. A method for regulating a pyrolysis process involving different media, characterized in that: The following steps are involved: A pyrolysis process device is provided, including pipeline X, pipeline Y, pipeline Z, pipeline M, pipeline A, pipeline B, main pipe A, main pipe B, main pipe C and a mixer, wherein: Pipeline X is connected to main pipe A through a valve; Pipeline Y is connected to main pipe B through a valve; Pipeline Z is connected to main pipe C through a valve; Pipeline M is connected between pipeline Y, pipeline B and pipeline Z, and the on-off control is realized through the valve; Pipeline A is connected to pipeline X, and pipeline B is connected to pipeline M; Each main pipe is connected to a mixer, which mixes the input gas to form a target pyrolysis atmosphere; According to the target pyrolysis process requirements, by adjusting the valve states on pipeline X, pipeline Y, pipeline Z, pipeline M, pipeline A and pipeline B, the following operating conditions can be adjusted: It can be adjusted to air-coal pyrolysis state in any state; It can be adjusted to pure oxygen coal pyrolysis state in any state; It can be adjusted to different oxygen concentration pyrolysis states in any state; It can be adjusted to other pyrolysis modes in any state; During the pyrolysis process, the ratio of gases in each pipeline is adjusted by adjusting the opening and closing state and opening degree of the valve, and the temperature field and composition of the target pyrolysis atmosphere are controlled.

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

3. The method for regulating a pyrolysis process involving different media according to claim 1, characterized in that: The method for adjusting the pure oxygen coal pyrolysis to air coal pyrolysis comprises: Under pure oxygen coal pyrolysis state: The valve on pipeline A is in the closed state; The valve on pipe X is open; The valve on pipeline Y is in the closed state; The valve on pipe M is in the open state; The valve on pipe B is in the closed state; The valve on pipe Z is open; Adjust to air-coal pyrolysis state: Pipeline Y supplies gas to main pipe B by opening the valve, and after mixing with coal gas, it participates in pyrolysis through the mixer; The valves on pipelines M and A are in closed state to avoid cross interference of different media.

4. The method for regulating a pyrolysis process involving different media according to claim 1, characterized in that: The step of adjusting the pyrolysis atmosphere with different oxygen concentrations comprises: On the basis of pure oxygen coal pyrolysis or air coal pyrolysis, the pyrolysis mode of different media is adjusted by adjusting the opening of the valve of pipeline A and the valve of pipeline B; According to the pyrolysis requirements, the concentration of different media is controlled to generate differentiated pyrolysis atmospheres.

5. The method for regulating a pyrolysis process involving different media according to claim 1, characterized in that: The operating state also includes: Other inert gases or reaction gases are introduced to participate in the pyrolysis reaction or to regulate the pyrolysis atmosphere.

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

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

8. The method for regulating a pyrolysis process involving different media according to claim 1, characterized in that: In the process of adjusting the air-coal pyrolysis to the pure oxygen-coal pyrolysis, the valve of the pipeline M is controlled to maintain the valve on the pipeline M closed in the adjustment state.

9. The method for regulating a pyrolysis process involving different media according to claim 1, characterized in that: The adjustment method is implemented by an automatic control system, which includes: Valve opening and closing real-time control module, used to control the valve status of pipeline X, pipeline Y, pipeline Z and pipeline 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 according to the feedback information.

10. A pyrolysis process regulation system involving different media, based on a pyrolysis process regulation method involving different media as claimed in any one of claims 1 to 9, characterized in that: include: A pipeline X connected to the main pipe A, and a third valve and a fourth valve are provided on the pipeline X; A pipeline Y connected to the main pipe B, and a fifth valve and a sixth valve are provided on the pipeline Y; A pipeline Z connected to the main pipe C, and an eleventh valve and a twelfth valve are provided on the pipeline Z; Pipeline A is connected to pipeline X, and a first valve and a second valve are provided on pipeline A; Pipeline B is connected to pipeline M, and a seventh valve and an eighth valve are provided on pipeline B; Pipeline M, one end of which is connected to pipeline Y through a valve, and the other end of which is connected to pipeline Z through a valve; valves No. 9 and No. 10 are provided on pipeline M; A mixer, which is connected to the main pipe A, the main pipe B and the main pipe C respectively, and is used to mix oxygen, air, coal gas or other inert gas or reaction gas and introduce it into the pyrolysis system; An automatic control system for controlling the opening and closing state of the valve to achieve regulation or mixing of oxygen, air, coal gas and other inert gases or reaction gases; The pipeline M is used to connect the pipeline Y and the pipeline Z, and the gas mixing ratio is adjusted through the valve to achieve the adjustment of different pyrolysis atmospheres; The pipeline A and the pipeline B can be fed with other inert gases or reactive gases, and the flow rate and the mixing ratio thereof can be adjusted by the automatic control system.

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