Oxygen control coal load control system of gasification furnace and control method thereof

Abstract

The application discloses an oxygen control coal load control system, which comprises a load distribution unit, an oxygen-coal ratio adjusting unit, a coal line A coal quantity adjusting unit, a coal line B coal quantity adjusting unit and a coal line C coal quantity adjusting unit. The application also discloses a control method of the oxygen control coal load control system of a gasification furnace, which is characterized by comprising the following steps: load distribution unit input, oxygen-coal ratio adjusting unit input, coal line A coal quantity adjusting unit input, coal line B coal quantity adjusting unit input and coal line C coal quantity adjusting unit input. The application takes oxygen flow as a control parameter of gasification load, integrates oxygen-coal ratio control and coal line control, forms an oxygen load automatic control system of a gasification device, and achieves the simplification and optimization of process operation and the stable operation of the gasification device.

Description

Technical Field

[0001] This invention belongs to the field of coal gasification technology, specifically relating to an oxygen-controlled coal load control system for a gasifier, and also to a control method for the system. Background Technology

[0002] The Colin coal gasification process, as a representative of coal gasification technology, is widely used in various regions. It employs a fluidized bed reactor, using dry pulverized coal as raw material for pressurized gasification. It boasts advantages such as wide coal adaptability, high gasification efficiency, low investment, low operating and maintenance costs, and energy conservation and environmental protection. The unit uses the amount of coal fed into the furnace as the load control point. Because pulverized coal is a solid medium, the accuracy of its flow meter is affected by numerous factors, including operating conditions, the cleanliness of the pulverized coal, and the calibration of the flow meter itself. This leads to significant fluctuations in the coal feed rate, making it difficult to accurately control the oxygen ratio and posing a significant risk of excessive oxygen damaging the gasifier's internal components. Furthermore, the variability in coal quality not only affects the pulverized coal flow meter but also increases the difficulty of process operation for gasification personnel. If operating conditions are not adjusted in a timely or proper manner, it can lead to unit shutdowns or, in severe cases, damage to internal components of the gasifier. These factors severely restrict the safe, stable, and long-term operation of the Kelin gasifier. Furthermore, due to the wide variety of raw coal sources and significant differences in coal quality, the coal powder flow meter experiences large fluctuations, the coal line is unstable, and the coal powder flow regulating valve is often in manual mode. This makes it difficult to implement the entire gasifier load control, oxygen-to-coal ratio control, and automatic coal line control loop, which are based on the amount of coal fed into the furnace. Large fluctuations in coal quality necessitate frequent adjustments to the gasifier's operating conditions, and manual operation not only significantly increases the difficulty for gasifier operators but also carries the risk of shutdown or equipment damage due to untimely or improper operation. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an oxygen-coal load control system and control method for a gasifier that uses oxygen flow rate as the control parameter for gasification load and integrates oxygen-coal ratio control and coal line control to form an automatic oxygen load control system for the gasifier. This system simplifies and optimizes the process operation and ensures the stable operation of the gasifier.

[0004] The objective of this invention and the solution to its main technical problem are achieved by the following technical solutions:

[0005] An oxygen-controlled coal load control system of the present invention includes a load distribution unit, an oxygen-coal ratio adjustment unit, a coal quantity adjustment unit for coal line A, a coal quantity adjustment unit for coal line B, and a coal quantity adjustment unit for coal line C. The load distribution unit is digitally connected to the oxygen-coal ratio adjustment unit, which in turn is digitally connected to the coal quantity adjustment units for coal lines A, B, and C. The load distribution unit comprises an oxygen load input setting module, an oxygen load ramp function module, an oxygen load limiting module, an oxygen valve controller, a real-time oxygen coefficient module, a maximum value module, and an oxygen load distribution module. The oxygen load input setting module is digitally connected to the oxygen load ramp function module, which is digitally connected to the oxygen load limiting module and the maximum value module. The oxygen load limiting module is digitally connected to the oxygen valve controller of the oxygen main pipe regulating valve, which is digitally connected to the oxygen main pipe regulating valve. The maximum value module is digitally connected to the real-time oxygen coefficient module and the oxygen load distribution module, which in turn is digitally connected to the coal quantity adjustment units for coal lines A, B, and C.

[0006] The oxygen-coal ratio adjustment unit consists of a load-oxygen-coal ratio pre-set function module, an oxygen-coal ratio correction module, an automatic oxygen-coal ratio correction value input module, an automatic oxygen-coal ratio limit module, a manual oxygen-coal ratio input module, a manual oxygen-coal ratio limit module, a manual / automatic mode selection module, and an oxygen-coal ratio ramp function module. The load-oxygen-coal ratio pre-set function module is digitally connected to the real-time oxygen coefficient module and the oxygen-coal ratio correction module. The oxygen-coal ratio correction module is digitally connected to the automatic oxygen-coal ratio correction value input module and the automatic oxygen-coal ratio limit module. The automatic oxygen-coal ratio limit module is digitally connected to the manual / automatic mode selection module. The manual / automatic mode selection module is digitally connected to the manual oxygen-coal ratio limit module and the oxygen-coal ratio ramp function module. The manual oxygen-coal ratio limit module is digitally connected to the manual oxygen-coal ratio input module. The oxygen-coal ratio ramp function module is digitally connected to the coal quantity adjustment units of coal line A, coal line B, and coal line C.

[0007] The coal quantity regulation unit of coal line A consists of a coal line A oxygen-coal ratio correction module, a coal line A oxygen-coal ratio limitation module, a coal line A set coal quantity calculation module, a coal line A coal quantity regulation valve controller, and a coal line A oxygen-coal ratio correction value input module. The coal line A oxygen-coal ratio correction module is digitally connected to the oxygen-coal ratio ramp function module, the coal line A oxygen-coal ratio limitation module, and the coal line A oxygen-coal ratio correction value input module. The coal line A oxygen-coal ratio limitation module is digitally connected to the coal line A set coal quantity calculation module. The coal line A set coal quantity calculation module is digitally connected to the coal line A coal quantity regulation valve controller. The coal line A coal quantity regulation valve controller is digitally connected to the coal flow regulation valve of line A.

[0008] The coal quantity regulation unit of coal line B consists of a coal line B oxygen-coal ratio correction module, a coal line B oxygen-coal ratio limitation module, a coal line B set coal quantity calculation module, a coal line B coal quantity regulation valve controller, and a coal line B oxygen-coal ratio correction value input module. The coal line B oxygen-coal ratio correction module is digitally connected to the oxygen-coal ratio ramp function module, the coal line B oxygen-coal ratio limitation module, and the coal line B oxygen-coal ratio correction value input module, respectively. The coal line B oxygen-coal ratio limitation module is digitally connected to the coal line B set coal quantity calculation module, the coal line B set coal quantity calculation module is digitally connected to the coal line B coal quantity regulation valve controller, and the coal line B coal quantity regulation valve controller is digitally connected to the B-line coal flow regulation valve.

[0009] The coal quantity regulation unit of coal line C consists of a coal line C oxygen-coal ratio correction module, a coal line C oxygen-coal ratio limiting module, a coal line C set coal quantity calculation module, a coal line C coal quantity regulating valve controller, and a coal line C oxygen-coal ratio correction value input module. The coal line C oxygen-coal ratio correction module is digitally connected to the oxygen-coal ratio ramp function module, the coal line C oxygen-coal ratio limiting module, and the coal line C oxygen-coal ratio correction value input module, respectively. The coal line C oxygen-coal ratio limiting module is digitally connected to the coal line C set coal quantity calculation module. The coal line C set coal quantity calculation module is digitally connected to the coal line C coal quantity regulating valve controller. The coal line C coal quantity regulating valve controller is digitally connected to the C-line coal flow regulating valve.

[0010] A control method for an oxygen-controlled coal load control system of a gasifier, characterized by comprising the following steps;

[0011] 1) Load distribution unit input:

[0012] The oxygen load is manually input through the oxygen load input setting module, and the input oxygen load setting value is then fed into the oxygen load ramp function module. The ramp function module's function is to change the load setting from the original setting to the new setting at a predetermined rate when the load setting changes. The output of the oxygen load ramp function module is fed into the oxygen load limiting module to ensure that the set oxygen load is within the process design range. One output of the oxygen load limiting module is used as the setting value for the oxygen valve controller to control the oxygen main pipe regulating valve; the other output is fed into the maximum value module. The actual oxygen flow rate from the field is multiplied by a coefficient by the real-time oxygen coefficient module before being fed into the maximum value module. The output of the maximum value module is the larger of the output values ​​from the real-time oxygen coefficient module and the oxygen load limiting module. This maximum value is then divided into three equal parts in the oxygen load distribution module and fed into the coal line A coal quantity regulating unit, the coal line B coal quantity regulating unit, and the coal line C coal quantity regulating unit, respectively.

[0013] 2) Input to the oxygen-to-coal ratio adjustment unit:

[0014] The oxygen-coal ratio adjustment unit has two modes: automatic and manual. In manual mode, the oxygen-coal ratio value is set in the manual oxygen-coal ratio input module, then enters the manual oxygen-coal ratio limit module to prevent the manually input oxygen-coal ratio from exceeding the design range, and finally enters the manual / automatic mode selection module. In automatic mode, the real-time oxygen flow rate from the field is used through the load-oxygen-coal ratio pre-set function module to obtain an oxygen-coal ratio corresponding to the current oxygen load. This value, along with the oxygen-coal ratio correction value from the automatic oxygen-coal ratio correction value input module, enters the oxygen-coal ratio correction module. The corrected value is added together in the oxygen-coal ratio correction module, and then passes through the automatic oxygen-coal ratio limit module before reaching the manual / automatic mode selection module. The output of the manual / automatic mode selection module enters the oxygen-coal ratio ramp function module, causing the oxygen-coal ratio to change from the original setting to the newly set oxygen-coal ratio at a predetermined rate. The oxygen-coal ratio output from the oxygen-coal ratio ramp function module is then input into the coal quantity adjustment units of coal line A, coal line B, and coal line C to control the coal quantity of the coal lines.

[0015] 3) Input to coal quantity adjustment unit A of coal line:

[0016] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio ramp function module of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line A from the oxygen-coal ratio correction value input module of coal line A are added and corrected by the oxygen-coal ratio correction module of coal line A, and then enter the oxygen-coal ratio limit module of coal line A. Then, together with the oxygen load distribution module in the load distribution unit to allocate the set oxygen amount, they enter the set coal quantity calculation module of coal line A. The set coal quantity calculation module of coal line A divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line A under the current set load, and enters the coal quantity regulating valve controller of coal line A to automatically control the coal flow regulating valve of A line on site.

[0017] 4) Input to coal quantity adjustment unit B of coal line:

[0018] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio ramp function module of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line B from the oxygen-coal ratio correction value input module of coal line B are added and corrected by the oxygen-coal ratio correction module of coal line B, and then enter the oxygen-coal ratio limit module of coal line B. Then, together with the oxygen load allocation module from the load allocation unit to allocate the set oxygen amount, they enter the set coal quantity calculation module of coal line B. The set coal quantity calculation module of coal line B will divide the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line B under the current set load. This value is then entered into the coal quantity regulating valve controller of coal line B to automatically control the coal flow regulating valve of B line B on site.

[0019] 5) Input to coal line C coal quantity adjustment unit:

[0020] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio ramp function module of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line C from the oxygen-coal ratio correction value input module of coal line C are added and corrected by the oxygen-coal ratio correction module of coal line C. Then, they enter the oxygen-coal ratio limit module of coal line C. Then, together with the oxygen load distribution module in the load distribution unit to allocate the set oxygen amount, they enter the set coal quantity calculation module of coal line C. The set coal quantity calculation module of coal line C will divide the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line C under the current set load. This value is then entered into the coal quantity regulating valve controller of coal line C to automatically control the coal flow regulating valve of C line C on site.

[0021] The aforementioned large-cap module uses oxygen flow rate as a load control parameter. In the oxygen load allocated to the coal line, it adopts a mode that combines real-time oxygen quantity with set oxygen quantity to prevent over-oxygenation in the gasifier.

[0022] The automatic control of the coal flow regulating valves on lines A, B, and C is achieved by setting the oxygen load input setting module and the automatic oxygen-coal ratio correction value input module. This allows for the automatic adjustment of the coal quantity of the coal quantity regulating units on lines A, B, and C based on the set load and oxygen-coal ratio.

[0023] The oxygen-coal ratio adjustment unit is equipped with manual and automatic modes. In automatic mode, it operates by using a load-oxygen-coal ratio pre-set function module plus an automatic oxygen-coal ratio limit module. In manual mode, it operates by directly inputting the oxygen-coal ratio of the gasifier using a manual oxygen-coal ratio input module.

[0024] The load ramp function module and the oxygen-coal ratio ramp function module enable the gasifier load and oxygen-coal ratio to be automatically adjusted at a set rate.

[0025] The coal quantity adjustment unit for coal line A, coal quantity adjustment unit for coal line B, and coal quantity adjustment unit for coal line C are respectively equipped with an oxygen-coal ratio correction value input module for coal line A, an oxygen-coal ratio correction value input module for coal line B, and an oxygen-coal ratio correction value input module for coal line C. The oxygen-coal ratio of each coal line can be adjusted separately according to the actual operating conditions of each coal line.

[0026] The oxygen load input setting module, automatic oxygen-coal ratio correction value input module, manual oxygen-coal ratio input module, coal line A oxygen-coal ratio correction value input module, coal line B oxygen-coal ratio correction value input module, and coal line C oxygen-coal ratio correction value input module are all equipped with quick increase and decrease functions.

[0027] Compared with existing technologies, this invention has significant advantages. As can be seen from the above technical solution, by combining the characteristics of stable oxygen flow and large fluctuations in pulverized coal flow, controlling the coal quantity through oxygen quantity avoids the large fluctuations in operating conditions and unstable operation caused by controlling oxygen quantity with coal quantity. Before the gasifier is in normal operation, this system only needs to set the oxygen load and the automatic mode oxygen-to-coal ratio correction value to automatically adjust the coal quantity of all coal lines. It has a high degree of automation, is highly efficient and reliable, and avoids human error. By combining the set oxygen load with the actual oxygen load to control the coal line load, it can automatically increase the coal quantity in a timely manner when the oxygen quantity fluctuates, preventing the gasifier from burning out due to excessive oxygen. The application of the oxygen load ramp function module and the oxygen-to-coal ratio ramp function module ensures that the gasifier load and oxygen-to-coal ratio are automatically adjusted at a predetermined rate, avoiding drastic changes in operating conditions. The oxygen-to-coal ratio control has both manual and automatic modes. The automatic mode uses a preset oxygen-coal ratio based on the current oxygen load (load-oxygen-coal ratio pre-set function module) plus a manual correction value for normal operation. In manual mode, under special circumstances (gasifier start-up phase), each coal line has its own oxygen-coal ratio correction module (coal line A oxygen-coal ratio correction value input module, coal line B oxygen-coal ratio correction value input module, coal line C oxygen-coal ratio correction value input module). Operators can individually adjust the oxygen-coal ratio based on the actual operating conditions of each coal line. This adjustment is available in all manual setting modules (oxygen load input setting module, automatic oxygen-coal ratio correction value input module, manual oxygen-coal ratio...). The input modules (coal line A oxygen-coal ratio correction value input module, coal line B oxygen-coal ratio correction value input module, and coal line C oxygen-coal ratio correction value input module) are all equipped with quick increase / decrease functions. Clicking a button changes the set value, avoiding input errors. In the diagram, A represents the coal quantity adjustment unit for coal line A, B represents the coal quantity adjustment unit for coal line B, and C represents the coal quantity adjustment unit for coal line C. This system uses oxygen flow rate as the control parameter for gasification load and integrates oxygen-coal ratio control and coal line control to form an automatic oxygen load control system for the gasification unit. This simplifies and optimizes process operations, ensuring stable operation of the gasification unit. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure label:

[0030] 1. Oxygen load input setting module; 2. Oxygen load ramp function module; 3. Oxygen load limiting module; 4. Oxygen valve controller; 5. Real-time oxygen coefficient module; 6. Maximum value module; 7. Oxygen load distribution module; 8. Load-oxygen-coal ratio pre-set function module; 9. Oxygen-coal ratio correction module; 10. Automatic oxygen-coal ratio correction value input module; 11. Automatic oxygen-coal ratio limiting module; 12. Manual oxygen-coal ratio input module; 13. Manual oxygen-coal ratio limiting module; 14. Manual / automatic mode selection module; 15. The following modules are listed: 16. Oxygen-coal ratio slope function module; 17. Oxygen-coal ratio correction module for coal line A; 18. Oxygen-coal ratio limit module for coal line A; 19. Coal quantity calculation module for coal line A; 20. Coal quantity regulating valve controller for coal line A; 21. Oxygen-coal ratio correction value input module for coal line A; 22. Oxygen-coal ratio correction module for coal line B; 23. Oxygen-coal ratio limit module for coal line B; 24. Oxygen quantity calculation module for coal line B; 25. Coal quantity regulating valve controller for coal line B; 26. Oxygen-coal ratio correction value input module for coal line B; 27. Oxygen-coal ratio limit module for coal line C; 28. Oxygen quantity calculation module for coal line C; 29. ​​Coal quantity regulating valve controller for coal line C; 30. Oxygen-coal ratio correction value input module for coal line C. Detailed Implementation

[0031] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed account of the specific implementation methods, structures, features, and effects of the present invention. Example 1

[0032] An oxygen-controlled coal load control system of the present invention includes a load distribution unit, an oxygen-coal ratio adjustment unit, a coal quantity adjustment unit for coal line A, a coal quantity adjustment unit for coal line B, and a coal quantity adjustment unit for coal line C. The load distribution unit is digitally connected to the oxygen-coal ratio adjustment unit, which is digitally connected to the coal quantity adjustment units for coal lines A, B, and C, respectively. The load distribution unit comprises an oxygen load input setting module 1, an oxygen load ramp function module 2, an oxygen load limiting module 3, an oxygen valve controller 4, a real-time oxygen coefficient module 5, a maximum value module 6, and an oxygen load distribution module 7. The oxygen load input setting module 1 is digitally connected to the oxygen load ramp function module 2, and the oxygen load ramp function module 7... 2. Digitally connect the oxygen load limiting module 3 and the maximum value module 6. The oxygen load limiting module 3 is digitally connected to the oxygen main regulating valve and the oxygen valve controller 4. The oxygen valve controller 4 is digitally connected to the oxygen main regulating valve. The maximum value module 6 is digitally connected to the real-time oxygen coefficient module 5 and the oxygen load distribution module 7. The oxygen load distribution module 7 is digitally connected to the coal quantity adjustment units of coal line A, coal line B, and coal line C. The oxygen-coal ratio adjustment unit consists of the load-oxygen-coal ratio pre-set function module 8, the oxygen-coal ratio correction module 9, the automatic oxygen-coal ratio correction value input module 10, the automatic oxygen-coal ratio limiting module 11, the manual oxygen-coal ratio input module 12, the manual oxygen-coal ratio limiting module 13, and the manual / automatic mode selection module 1. 4. The oxygen-coal ratio slope function module 15 is composed of a load-oxygen-coal ratio pre-set function module 8, which is digitally connected to the real-time oxygen coefficient module 5 and the oxygen-coal ratio correction module 9. The oxygen-coal ratio correction module 9 is digitally connected to the automatic oxygen-coal ratio correction value input module 10 and the automatic oxygen-coal ratio limit module 11. The automatic oxygen-coal ratio limit module 11 is digitally connected to the manual / automatic mode selection module 14. The manual / automatic mode selection module 14 is digitally connected to the manual oxygen-coal ratio limit module 13 and the oxygen-coal ratio slope function module 15. The manual oxygen-coal ratio limit module 13 is digitally connected to the manual oxygen-coal ratio input module 12. The oxygen-coal ratio slope function module 15 is digitally connected to the coal line A coal quantity adjustment unit, the coal line B coal quantity adjustment unit, and the coal line C coal quantity adjustment unit. The coal quantity adjustment unit for coal line A consists of a coal line A oxygen-coal ratio correction module 16, a coal line A oxygen-coal ratio limitation module 17, a coal line A set coal quantity calculation module 18, a coal line A coal quantity adjustment valve controller 19, and a coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio correction module 16 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line A oxygen-coal ratio limitation module 17, and the coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio limitation module 17 is digitally connected to the coal line A set coal quantity calculation module 18, and the coal line A set coal quantity calculation module 18 is digitally connected to the coal line A coal quantity adjustment valve controller 19. The coal line A coal quantity adjustment valve controller 19 is digitally connected to the coal flow adjustment valve of line A.The coal quantity regulation unit of coal line B consists of a coal line B oxygen-coal ratio correction module 21, a coal line B oxygen-coal ratio limitation module 22, a coal line B set coal quantity calculation module 23, a coal line B coal quantity regulation valve controller 24, and a coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio correction module 21 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line B oxygen-coal ratio limitation module 22, and the coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio limitation module 22 is digitally connected to the coal line B set coal quantity calculation module 23. The coal line B set coal quantity calculation module 23 is digitally connected to the coal line B coal quantity regulation valve controller 24. The coal line B coal quantity regulation valve controller 24 is digitally connected to the B-line coal flow regulation valve. The coal quantity regulation unit of coal line C consists of a coal line C oxygen-coal ratio correction module 26, a coal line C oxygen-coal ratio limiting module 27, a coal line C set coal quantity calculation module 28, a coal line C coal quantity regulating valve controller 29, and a coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio correction module 26 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line C oxygen-coal ratio limiting module 27, and the coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio limiting module 27 is digitally connected to the coal line C set coal quantity calculation module 28. The coal line C set coal quantity calculation module 28 is digitally connected to the coal line C coal quantity regulating valve controller 29. The coal line C coal quantity regulating valve controller 29 is digitally connected to the C-line coal flow regulating valve.

[0033] A control method for an oxygen-controlled coal load control system of a gasifier, characterized by comprising the following steps;

[0034] 1) Load distribution unit input:

[0035] The oxygen load setting value of 13500 Nm3 / h is manually input through the oxygen load input setting module 1. This input value then enters the oxygen load ramp function module 2. The ramp function module's function is to change the load setting at a predetermined rate when the load setting changes. The output of the oxygen load ramp function module 2 enters the oxygen load limiting module 3 to ensure the set oxygen load is within the process design range. One output of the oxygen load limiting module 3 is used as the setting value for the oxygen valve controller to control the oxygen main pipe regulating valve. The other output enters the maximum value module 6, which takes the actual oxygen flow rate from the field. After being multiplied by a coefficient by the real-time oxygen coefficient module 5, the output of the maximum value module 6 is the larger of the output values ​​from the real-time oxygen coefficient module 5 and the oxygen load limiting module 3. This larger value is then divided into three equal parts in the oxygen load distribution module 7 and sent to the coal line A coal quantity regulating unit, the coal line B coal quantity regulating unit, and the coal line C coal quantity regulating unit, respectively.

[0036] Input to the oxygen-to-coal ratio adjustment unit:

[0037] The oxygen-coal ratio adjustment unit has two modes: automatic and manual. In manual mode, the oxygen-coal ratio is set to 1.22 in the manual oxygen-coal ratio input module 12, then the manual oxygen-coal ratio limit module 13 is entered to prevent the manually input oxygen-coal ratio from exceeding the design range, and then the manual / automatic mode selection module 14 is entered. In automatic mode, the real-time oxygen flow rate from the site is used to obtain an oxygen-coal ratio value of 1.22 corresponding to the current oxygen load through the load-oxygen-coal ratio pre-set function module 8. This value, together with the oxygen-coal ratio correction value of -0.05 to 0.05 from the automatic oxygen-coal ratio correction value input module 10, enters the oxygen-coal ratio correction module 9. The values ​​are added and corrected in the oxygen-coal ratio correction module 9, and then pass through the automatic oxygen-coal ratio limiting module 11 before reaching the manual / automatic mode selection module 14. The output of the manual / automatic mode selection module 14 enters the oxygen-coal ratio ramp function module 15, causing the original oxygen-coal ratio to change at a predetermined rate to the newly set oxygen-coal ratio value of 1.22. The oxygen-coal ratio output by the oxygen-coal ratio ramp function module 15 enters the coal quantity adjustment unit of coal line A, coal line B, and coal line C respectively to participate in the control of the coal quantity of the coal line.

[0038] 3) Input to coal quantity adjustment unit A of coal line:

[0039] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line A from the oxygen-coal ratio correction value input module 20 of coal line A are added and corrected by the oxygen-coal ratio correction module 16 of coal line A, and then enter the oxygen-coal ratio limit module 17 of coal line A. Then, together with the oxygen load allocation module 7 in the load allocation unit to set the oxygen quantity, they enter the set coal quantity calculation module 18 of coal line A. The set coal quantity calculation module 18 of coal line A divides the set oxygen quantity and the oxygen-coal ratio to obtain the set coal quantity value of coal line A under the current set load, and enters the coal quantity regulating valve controller 19 of coal line A to automatically control the coal flow regulating valve of its field.

[0040] 4) Input to coal quantity adjustment unit B of coal line:

[0041] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line B from the oxygen-coal ratio correction value input module 25 of coal line B are added and corrected by the oxygen-coal ratio correction module 21 of coal line B, and then enter the oxygen-coal ratio limit module 22 of coal line B. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal amount calculation module 23 of coal line B. The set coal amount calculation module 23 of coal line B divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal amount of coal line B under the current set load, and enters the coal amount regulating valve controller 24 of coal line B to automatically control the coal flow regulating valve of B line B on site.

[0042] 5) Input to coal line C coal quantity adjustment unit:

[0043] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line C from the oxygen-coal ratio correction value input module 30 are added and corrected by the oxygen-coal ratio correction module 26 of coal line C, and then enter the oxygen-coal ratio limit module 27 of coal line C. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal quantity calculation module 28 of coal line C. The set coal quantity calculation module 28 of coal line C divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line C under the current set load, and enters the coal quantity regulating valve controller 29 of coal line C to automatically control the coal flow regulating valve of C line C on site.

[0044] The above-mentioned large-cap module 6 uses oxygen flow rate as a load control parameter. In the oxygen load allocated to the coal line, it adopts a mode that combines real-time oxygen quantity with set oxygen quantity to prevent the gasifier from experiencing over-oxygenation.

[0045] The automatic control of the coal flow regulating valves on lines A, B, and C is achieved by setting the oxygen load input setting module 1 and the automatic oxygen-coal ratio correction value input module 10. This allows for the automatic adjustment of the coal quantity of the coal quantity regulating units on lines A, B, and C based on the set load and oxygen-coal ratio.

[0046] The oxygen-coal ratio adjustment unit is equipped with manual and automatic modes. In automatic mode, it operates by using the load-oxygen-coal ratio pre-function module 8 and the automatic oxygen-coal ratio limit module 11. In manual mode, it operates by directly inputting the oxygen-coal ratio of the gasifier using the manual oxygen-coal ratio input module 12.

[0047] The load ramp function module 2 and the oxygen-coal ratio ramp function module 15 enable the gasifier load and oxygen-coal ratio to be automatically adjusted at a set rate.

[0048] The coal quantity adjustment unit for coal line A, coal quantity adjustment unit for coal line B, and coal quantity adjustment unit for coal line C are respectively equipped with a coal line A oxygen-coal ratio correction value input module 20, a coal line B oxygen-coal ratio correction value input module 25, and a coal line C oxygen-coal ratio correction value input module 30, which can adjust the oxygen-coal ratio of each coal line individually according to the actual operating conditions of each coal line.

[0049] The oxygen load input setting module 1, the automatic oxygen-coal ratio correction value input module 10, the manual oxygen-coal ratio input module 12, the oxygen-coal ratio correction value input module 20 for coal line A, the oxygen-coal ratio correction value input module 25 for coal line B, and the oxygen-coal ratio correction value input module 30 for coal line C are all equipped with quick increase / decrease functions. Example 2

[0050] An oxygen-controlled coal load control system of the present invention includes a load distribution unit, an oxygen-coal ratio adjustment unit, a coal quantity adjustment unit for coal line A, a coal quantity adjustment unit for coal line B, and a coal quantity adjustment unit for coal line C. The load distribution unit is digitally connected to the oxygen-coal ratio adjustment unit, which is digitally connected to the coal quantity adjustment units for coal lines A, B, and C, respectively. The load distribution unit comprises an oxygen load input setting module 1, an oxygen load ramp function module 2, an oxygen load limiting module 3, an oxygen valve controller 4, a real-time oxygen coefficient module 5, a maximum value module 6, and an oxygen load distribution module 7. The oxygen load input setting module 1 is digitally connected to the oxygen load ramp function module 2, and the oxygen load ramp function module 7... 2. Digitally connect the oxygen load limiting module 3 and the maximum value module 6. The oxygen load limiting module 3 is digitally connected to the oxygen main regulating valve and the oxygen valve controller 4. The oxygen valve controller 4 is digitally connected to the oxygen main regulating valve. The maximum value module 6 is digitally connected to the real-time oxygen coefficient module 5 and the oxygen load distribution module 7. The oxygen load distribution module 7 is digitally connected to the coal quantity adjustment units of coal line A, coal line B, and coal line C. The oxygen-coal ratio adjustment unit consists of the load-oxygen-coal ratio pre-set function module 8, the oxygen-coal ratio correction module 9, the automatic oxygen-coal ratio correction value input module 10, the automatic oxygen-coal ratio limiting module 11, the manual oxygen-coal ratio input module 12, the manual oxygen-coal ratio limiting module 13, and the manual / automatic mode selection module 1. 4. The oxygen-coal ratio slope function module 15 is composed of a load-oxygen-coal ratio pre-set function module 8, which is digitally connected to the real-time oxygen coefficient module 5 and the oxygen-coal ratio correction module 9. The oxygen-coal ratio correction module 9 is digitally connected to the automatic oxygen-coal ratio correction value input module 10 and the automatic oxygen-coal ratio limit module 11. The automatic oxygen-coal ratio limit module 11 is digitally connected to the manual / automatic mode selection module 14. The manual / automatic mode selection module 14 is digitally connected to the manual oxygen-coal ratio limit module 13 and the oxygen-coal ratio slope function module 15. The manual oxygen-coal ratio limit module 13 is digitally connected to the manual oxygen-coal ratio input module 12. The oxygen-coal ratio slope function module 15 is digitally connected to the coal line A coal quantity adjustment unit, the coal line B coal quantity adjustment unit, and the coal line C coal quantity adjustment unit. The coal quantity adjustment unit for coal line A consists of a coal line A oxygen-coal ratio correction module 16, a coal line A oxygen-coal ratio limitation module 17, a coal line A set coal quantity calculation module 18, a coal line A coal quantity adjustment valve controller 19, and a coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio correction module 16 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line A oxygen-coal ratio limitation module 17, and the coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio limitation module 17 is digitally connected to the coal line A set coal quantity calculation module 18, and the coal line A set coal quantity calculation module 18 is digitally connected to the coal line A coal quantity adjustment valve controller 19. The coal line A coal quantity adjustment valve controller 19 is digitally connected to the coal flow adjustment valve of line A.The coal quantity regulation unit of coal line B consists of a coal line B oxygen-coal ratio correction module 21, a coal line B oxygen-coal ratio limitation module 22, a coal line B set coal quantity calculation module 23, a coal line B coal quantity regulation valve controller 24, and a coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio correction module 21 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line B oxygen-coal ratio limitation module 22, and the coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio limitation module 22 is digitally connected to the coal line B set coal quantity calculation module 23. The coal line B set coal quantity calculation module 23 is digitally connected to the coal line B coal quantity regulation valve controller 24. The coal line B coal quantity regulation valve controller 24 is digitally connected to the B-line coal flow regulation valve. The coal quantity regulation unit of coal line C consists of a coal line C oxygen-coal ratio correction module 26, a coal line C oxygen-coal ratio limiting module 27, a coal line C set coal quantity calculation module 28, a coal line C coal quantity regulating valve controller 29, and a coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio correction module 26 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line C oxygen-coal ratio limiting module 27, and the coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio limiting module 27 is digitally connected to the coal line C set coal quantity calculation module 28. The coal line C set coal quantity calculation module 28 is digitally connected to the coal line C coal quantity regulating valve controller 29. The coal line C coal quantity regulating valve controller 29 is digitally connected to the C-line coal flow regulating valve.

[0051] A control method for an oxygen-controlled coal load control system of a gasifier, characterized by comprising the following steps;

[0052] 1) Load distribution unit input:

[0053] The oxygen load setting value of 20000 Nm3 / h is manually input through the oxygen load input setting module 1. This input value then enters the oxygen load ramp function module 2. The ramp function module's function is to adjust the load setting from the original setting to the new setting at a predetermined rate when the load setting changes. The output of the oxygen load ramp function module 2 enters the oxygen load limiting module 3 to ensure the set oxygen load is within the process design range. One output of the oxygen load limiting module 3 is used as the setting value for the oxygen valve controller to control the oxygen main pipe regulating valve. The other output enters the maximum value module 6, which takes the actual oxygen flow rate from the field. After being multiplied by a coefficient by the real-time oxygen coefficient module 5, the output of the maximum value module 6 is the larger of the output values ​​from the real-time oxygen coefficient module 5 and the oxygen load limiting module 3. This larger value is then divided into three equal parts in the oxygen load distribution module 7 and sent to the coal line A coal quantity regulating unit, the coal line B coal quantity regulating unit, and the coal line C coal quantity regulating unit, respectively.

[0054] Input to the oxygen-to-coal ratio adjustment unit:

[0055] The oxygen-coal ratio adjustment unit has two modes: automatic and manual. In manual mode, the oxygen-coal ratio is set to 0.8 in the manual oxygen-coal ratio input module 12, then the manual oxygen-coal ratio limit module 13 is entered to prevent the manually input oxygen-coal ratio from exceeding the design range, and then the manual / automatic mode selection module 14 is entered. In automatic mode, the real-time oxygen flow rate from the site is used to obtain an oxygen-coal ratio value of 0.8 corresponding to the current oxygen load through the load-oxygen-coal ratio pre-set function module 8. This value, together with the oxygen-coal ratio correction value of -0.05 to 0.05 from the automatic oxygen-coal ratio correction value input module 10, enters the oxygen-coal ratio correction module 9. The values ​​are added and corrected in the oxygen-coal ratio correction module 9, and then pass through the automatic oxygen-coal ratio limiting module 11 before reaching the manual / automatic mode selection module 14. The output of the manual / automatic mode selection module 14 enters the oxygen-coal ratio ramp function module 15, causing the original oxygen-coal ratio to change at a predetermined rate to the newly set oxygen-coal ratio value of 0.8. The oxygen-coal ratio output by the oxygen-coal ratio ramp function module 15 enters the coal quantity adjustment unit of coal line A, coal line B, and coal line C respectively to participate in the control of the coal quantity of the coal line.

[0056] 3) Input to coal quantity adjustment unit A of coal line:

[0057] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line A from the oxygen-coal ratio correction value input module 20 of coal line A are added and corrected by the oxygen-coal ratio correction module 16 of coal line A, and then enter the oxygen-coal ratio limit module 17 of coal line A. Then, together with the oxygen load allocation module 7 in the load allocation unit to set the oxygen quantity, they enter the set coal quantity calculation module 18 of coal line A. The set coal quantity calculation module 18 of coal line A divides the set oxygen quantity and the oxygen-coal ratio to obtain the set coal quantity value of coal line A under the current set load, and enters the coal quantity regulating valve controller 19 of coal line A to automatically control the coal flow regulating valve of its field.

[0058] 4) Input to coal quantity adjustment unit B of coal line:

[0059] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line B from the oxygen-coal ratio correction value input module 25 of coal line B are added and corrected by the oxygen-coal ratio correction module 21 of coal line B, and then enter the oxygen-coal ratio limit module 22 of coal line B. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal amount calculation module 23 of coal line B. The set coal amount calculation module 23 of coal line B divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal amount of coal line B under the current set load, and enters the coal amount regulating valve controller 24 of coal line B to automatically control the coal flow regulating valve of B line B on site.

[0060] 5) Input to coal line C coal quantity adjustment unit:

[0061] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line C from the oxygen-coal ratio correction value input module 30 are added and corrected by the oxygen-coal ratio correction module 26 of coal line C, and then enter the oxygen-coal ratio limit module 27 of coal line C. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal quantity calculation module 28 of coal line C. The set coal quantity calculation module 28 of coal line C divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line C under the current set load, and enters the coal quantity regulating valve controller 29 of coal line C to automatically control the coal flow regulating valve of C line C on site.

[0062] The above-mentioned large-cap module 6 uses oxygen flow rate as a load control parameter. In the oxygen load allocated to the coal line, it adopts a mode that combines real-time oxygen quantity with set oxygen quantity to prevent the gasifier from experiencing over-oxygenation.

[0063] The automatic control of the coal flow regulating valves on lines A, B, and C is achieved by setting the oxygen load input setting module 1 and the automatic oxygen-coal ratio correction value input module 10. This allows for the automatic adjustment of the coal quantity of the coal quantity regulating units on lines A, B, and C based on the set load and oxygen-coal ratio.

[0064] The oxygen-coal ratio adjustment unit is equipped with manual and automatic modes. In automatic mode, it operates by using the load-oxygen-coal ratio pre-function module 8 and the automatic oxygen-coal ratio limit module 11. In manual mode, it operates by directly inputting the oxygen-coal ratio of the gasifier using the manual oxygen-coal ratio input module 12.

[0065] The load ramp function module 2 and the oxygen-coal ratio ramp function module 15 enable the gasifier load and oxygen-coal ratio to be automatically adjusted at a set rate.

[0066] The coal quantity adjustment unit for coal line A, coal quantity adjustment unit for coal line B, and coal quantity adjustment unit for coal line C are respectively equipped with a coal line A oxygen-coal ratio correction value input module 20, a coal line B oxygen-coal ratio correction value input module 25, and a coal line C oxygen-coal ratio correction value input module 30, which can adjust the oxygen-coal ratio of each coal line individually according to the actual operating conditions of each coal line.

[0067] The oxygen load input setting module 1, the automatic oxygen-coal ratio correction value input module 10, the manual oxygen-coal ratio input module 12, the oxygen-coal ratio correction value input module 20 for coal line A, the oxygen-coal ratio correction value input module 25 for coal line B, and the oxygen-coal ratio correction value input module 30 for coal line C are all equipped with quick increase / decrease functions. Example 3

[0068] An oxygen-controlled coal load control system of the present invention includes a load distribution unit, an oxygen-coal ratio adjustment unit, a coal quantity adjustment unit for coal line A, a coal quantity adjustment unit for coal line B, and a coal quantity adjustment unit for coal line C. The load distribution unit is digitally connected to the oxygen-coal ratio adjustment unit, which is digitally connected to the coal quantity adjustment units for coal lines A, B, and C, respectively. The load distribution unit comprises an oxygen load input setting module 1, an oxygen load ramp function module 2, an oxygen load limiting module 3, an oxygen valve controller 4, a real-time oxygen coefficient module 5, a maximum value module 6, and an oxygen load distribution module 7. The oxygen load input setting module 1 is digitally connected to the oxygen load ramp function module 2, and the oxygen load ramp function module 7... 2. Digitally connect the oxygen load limiting module 3 and the maximum value module 6. The oxygen load limiting module 3 is digitally connected to the oxygen main regulating valve and the oxygen valve controller 4. The oxygen valve controller 4 is digitally connected to the oxygen main regulating valve. The maximum value module 6 is digitally connected to the real-time oxygen coefficient module 5 and the oxygen load distribution module 7. The oxygen load distribution module 7 is digitally connected to the coal quantity adjustment units of coal line A, coal line B, and coal line C. The oxygen-coal ratio adjustment unit consists of the load-oxygen-coal ratio pre-set function module 8, the oxygen-coal ratio correction module 9, the automatic oxygen-coal ratio correction value input module 10, the automatic oxygen-coal ratio limiting module 11, the manual oxygen-coal ratio input module 12, the manual oxygen-coal ratio limiting module 13, and the manual / automatic mode selection module 1. 4. The oxygen-coal ratio slope function module 15 is composed of a load-oxygen-coal ratio pre-set function module 8, which is digitally connected to the real-time oxygen coefficient module 5 and the oxygen-coal ratio correction module 9. The oxygen-coal ratio correction module 9 is digitally connected to the automatic oxygen-coal ratio correction value input module 10 and the automatic oxygen-coal ratio limit module 11. The automatic oxygen-coal ratio limit module 11 is digitally connected to the manual / automatic mode selection module 14. The manual / automatic mode selection module 14 is digitally connected to the manual oxygen-coal ratio limit module 13 and the oxygen-coal ratio slope function module 15. The manual oxygen-coal ratio limit module 13 is digitally connected to the manual oxygen-coal ratio input module 12. The oxygen-coal ratio slope function module 15 is digitally connected to the coal line A coal quantity adjustment unit, the coal line B coal quantity adjustment unit, and the coal line C coal quantity adjustment unit. The coal quantity adjustment unit for coal line A consists of a coal line A oxygen-coal ratio correction module 16, a coal line A oxygen-coal ratio limitation module 17, a coal line A set coal quantity calculation module 18, a coal line A coal quantity adjustment valve controller 19, and a coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio correction module 16 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line A oxygen-coal ratio limitation module 17, and the coal line A oxygen-coal ratio correction value input module 20. The coal line A oxygen-coal ratio limitation module 17 is digitally connected to the coal line A set coal quantity calculation module 18, and the coal line A set coal quantity calculation module 18 is digitally connected to the coal line A coal quantity adjustment valve controller 19. The coal line A coal quantity adjustment valve controller 19 is digitally connected to the coal flow adjustment valve of line A.The coal quantity regulation unit of coal line B consists of a coal line B oxygen-coal ratio correction module 21, a coal line B oxygen-coal ratio limitation module 22, a coal line B set coal quantity calculation module 23, a coal line B coal quantity regulation valve controller 24, and a coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio correction module 21 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line B oxygen-coal ratio limitation module 22, and the coal line B oxygen-coal ratio correction value input module 25. The coal line B oxygen-coal ratio limitation module 22 is digitally connected to the coal line B set coal quantity calculation module 23. The coal line B set coal quantity calculation module 23 is digitally connected to the coal line B coal quantity regulation valve controller 24. The coal line B coal quantity regulation valve controller 24 is digitally connected to the B-line coal flow regulation valve. The coal quantity regulation unit of coal line C consists of a coal line C oxygen-coal ratio correction module 26, a coal line C oxygen-coal ratio limiting module 27, a coal line C set coal quantity calculation module 28, a coal line C coal quantity regulating valve controller 29, and a coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio correction module 26 is digitally connected to the oxygen-coal ratio ramp function module 15, the coal line C oxygen-coal ratio limiting module 27, and the coal line C oxygen-coal ratio correction value input module 30. The coal line C oxygen-coal ratio limiting module 27 is digitally connected to the coal line C set coal quantity calculation module 28. The coal line C set coal quantity calculation module 28 is digitally connected to the coal line C coal quantity regulating valve controller 29. The coal line C coal quantity regulating valve controller 29 is digitally connected to the C-line coal flow regulating valve.

[0069] A control method for an oxygen-controlled coal load control system of a gasifier, characterized by comprising the following steps;

[0070] 1) Load distribution unit input:

[0071] The oxygen load setting value of 28000 Nm3 / h is manually input through the oxygen load input setting module 1. This input value then enters the oxygen load ramp function module 2. The ramp function module's function is to change the load setting at a predetermined rate when the load setting changes. The output of the oxygen load ramp function module 2 enters the oxygen load limiting module 3 to ensure the set oxygen load is within the process design range. One output of the oxygen load limiting module 3 is used as the setting value for the oxygen valve controller to control the oxygen main pipe regulating valve. The other output enters the maximum value module 6. The actual oxygen flow rate from the field is multiplied by a coefficient by the real-time oxygen coefficient module 5 before entering the maximum value module 6. The output of the maximum value module 6 is the larger of the output values ​​from the real-time oxygen coefficient module 5 and the oxygen load limiting module 3. This larger value is then divided into three equal parts in the oxygen load distribution module 7 and sent to the coal line A coal quantity regulating unit, the coal line B coal quantity regulating unit, and the coal line C coal quantity regulating unit, respectively.

[0072] Input to the oxygen-to-coal ratio adjustment unit:

[0073] The oxygen-coal ratio adjustment unit has two modes: automatic and manual. In manual mode, the oxygen-coal ratio is set to 0.59 in the manual oxygen-coal ratio input module 12, then the manual oxygen-coal ratio limit module 13 is entered to prevent the manually input oxygen-coal ratio from exceeding the design range, and then the manual / automatic mode selection module 14 is entered. In automatic mode, the real-time oxygen flow rate from the site is used to obtain an oxygen-coal ratio value of 0.59 corresponding to the current oxygen load through the load-oxygen-coal ratio pre-set function module 8. This value, together with the oxygen-coal ratio correction value of -0.05 to 0.05 from the automatic oxygen-coal ratio correction value input module 10, enters the oxygen-coal ratio correction module 9. The values ​​are added and corrected in the oxygen-coal ratio correction module 9, and then pass through the automatic oxygen-coal ratio limiting module 11 before reaching the manual / automatic mode selection module 14. The output of the manual / automatic mode selection module 14 enters the oxygen-coal ratio ramp function module 15, causing the original oxygen-coal ratio to change at a predetermined rate to the newly set oxygen-coal ratio value of 0.59. The oxygen-coal ratio output by the oxygen-coal ratio ramp function module 15 enters the coal quantity adjustment unit of coal line A, coal line B, and coal line C respectively to participate in the control of the coal quantity of the coal line.

[0074] 3) Input to coal quantity adjustment unit A of coal line:

[0075] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line A from the oxygen-coal ratio correction value input module 20 of coal line A are added and corrected by the oxygen-coal ratio correction module 16 of coal line A, and then enter the oxygen-coal ratio limit module 17 of coal line A. Then, together with the oxygen load allocation module 7 in the load allocation unit to set the oxygen quantity, they enter the set coal quantity calculation module 18 of coal line A. The set coal quantity calculation module 18 of coal line A divides the set oxygen quantity and the oxygen-coal ratio to obtain the set coal quantity value of coal line A under the current set load, and enters the coal quantity regulating valve controller 19 of coal line A to automatically control the coal flow regulating valve of its field.

[0076] 4) Input to coal quantity adjustment unit B of coal line:

[0077] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line B from the oxygen-coal ratio correction value input module 25 of coal line B are added and corrected by the oxygen-coal ratio correction module 21 of coal line B, and then enter the oxygen-coal ratio limit module 22 of coal line B. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal amount calculation module 23 of coal line B. The set coal amount calculation module 23 of coal line B divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal amount of coal line B under the current set load, and enters the coal amount regulating valve controller 24 of coal line B to automatically control the coal flow regulating valve of B line B on site.

[0078] 5) Input to coal line C coal quantity adjustment unit:

[0079] The overall oxygen-coal ratio of the gasifier from the oxygen-coal ratio slope function module 15 of the oxygen-coal ratio adjustment unit and the oxygen-coal ratio correction value of coal line C from the oxygen-coal ratio correction value input module 30 are added and corrected by the oxygen-coal ratio correction module 26 of coal line C, and then enter the oxygen-coal ratio limit module 27 of coal line C. Then, together with the oxygen load allocation module 7 from the load allocation unit to set the oxygen amount, they enter the set coal quantity calculation module 28 of coal line C. The set coal quantity calculation module 28 of coal line C divides the set oxygen amount and the oxygen-coal ratio to obtain the set coal quantity of coal line C under the current set load, and enters the coal quantity regulating valve controller 29 of coal line C to automatically control the coal flow regulating valve of C line C on site.

[0080] The above-mentioned large-cap module 6 uses oxygen flow rate as a load control parameter. In the oxygen load allocated to the coal line, it adopts a mode that combines real-time oxygen quantity with set oxygen quantity to prevent the gasifier from experiencing over-oxygenation.

[0081] The automatic control of the coal flow regulating valves on lines A, B, and C is achieved by setting the oxygen load input setting module 1 and the automatic oxygen-coal ratio correction value input module 10. This allows for the automatic adjustment of the coal quantity of the coal quantity regulating units on lines A, B, and C based on the set load and oxygen-coal ratio.

[0082] The oxygen-coal ratio adjustment unit is equipped with manual and automatic modes. In automatic mode, it operates by using the load-oxygen-coal ratio pre-function module 8 and the automatic oxygen-coal ratio limit module 11. In manual mode, it operates by directly inputting the oxygen-coal ratio of the gasifier using the manual oxygen-coal ratio input module 12.

[0083] The load ramp function module 2 and the oxygen-coal ratio ramp function module 15 enable the gasifier load and oxygen-coal ratio to be automatically adjusted at a set rate.

[0084] The coal quantity adjustment unit for coal line A, coal quantity adjustment unit for coal line B, and coal quantity adjustment unit for coal line C are respectively equipped with a coal line A oxygen-coal ratio correction value input module 20, a coal line B oxygen-coal ratio correction value input module 25, and a coal line C oxygen-coal ratio correction value input module 30, which can adjust the oxygen-coal ratio of each coal line individually according to the actual operating conditions of each coal line.

[0085] The oxygen load input setting module 1, the automatic oxygen-coal ratio correction value input module 10, the manual oxygen-coal ratio input module 12, the oxygen-coal ratio correction value input module 20 for coal line A, the oxygen-coal ratio correction value input module 25 for coal line B, and the oxygen-coal ratio correction value input module 30 for coal line C are all equipped with quick increase / decrease functions.

Claims

1. An oxygen-coal load control system comprising a load distribution unit, an oxygen-coal ratio adjustment unit, a coal line A coal amount adjustment unit, a coal line B coal amount adjustment unit, and a coal line C coal amount adjustment unit, characterized in that, The load distribution unit is digitally connected with the oxygen-coal ratio adjusting unit, and the oxygen-coal ratio adjusting unit is digitally connected with the coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit and the coal line C coal quantity adjusting unit; the load distribution unit is composed of an oxygen load input setting module (1), an oxygen load ramp function module (2), an oxygen load limiting module (3), an oxygen valve controller (4), a real-time oxygen quantity coefficient module (5), a maximum module (6) and an oxygen load distribution module (7); the oxygen load input setting module (1) is digitally connected with the oxygen load ramp function module (2); the oxygen load ramp function module (2) is digitally connected with the oxygen load limiting module (3) and the maximum module (6) respectively; the oxygen load limiting module (3) is digitally connected with the oxygen valve controller (4) of the oxygen total pipe adjusting valve; the oxygen valve controller (4) is digitally connected with the oxygen total pipe adjusting valve; the maximum module (6) is digitally connected with the real-time oxygen quantity coefficient module (5) and the oxygen load distribution module (7) respectively; and the oxygen load distribution module (7) is digitally connected with the coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit and the coal line C coal quantity adjusting unit respectively. The oxygen-coal ratio adjusting unit is composed of a load-oxygen-coal ratio pre-preparation function module (8), an oxygen-coal ratio correction module (9), an automatic oxygen-coal ratio correction value input module (10), an automatic oxygen-coal ratio limiting module (11), a manual oxygen-coal ratio input module (12), a manual oxygen-coal ratio limiting module (13), a manual / automatic mode selection module (14) and an oxygen-coal ratio ramp function module (15); the load-oxygen-coal ratio pre-preparation function module (8) is digitally connected with the real-time oxygen quantity coefficient module (5) and the oxygen-coal ratio correction module (9) respectively; the oxygen-coal ratio correction module (9) is digitally connected with the automatic oxygen-coal ratio correction value input module (10) and the automatic oxygen-coal ratio limiting module (11) respectively; the automatic oxygen-coal ratio limiting module (11) is digitally connected with the manual / automatic mode selection module (14); the manual / automatic mode selection module (14) is digitally connected with the manual oxygen-coal ratio limiting module (13) and the oxygen-coal ratio ramp function module (15) respectively; the manual oxygen-coal ratio limiting module (13) is digitally connected with the manual oxygen-coal ratio input module (12); and the oxygen-coal ratio ramp function module (15) is digitally connected with the coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit and the coal line C coal quantity adjusting unit respectively. The coal line A coal quantity adjusting unit is composed of a coal line A oxygen-coal ratio correction module (16), a coal line A oxygen-coal ratio limiting module (17), a coal line A set coal quantity calculation module (18), a coal line A coal quantity adjusting valve controller (19) and a coal line A oxygen-coal ratio correction value input module (20); the coal line A oxygen-coal ratio correction module (16) is digitally connected with the oxygen-coal ratio ramp function module (15), the coal line A oxygen-coal ratio limiting module (17) and the coal line A oxygen-coal ratio correction value input module (20) respectively; the coal line A oxygen-coal ratio limiting module (17) is digitally connected with the coal line A set coal quantity calculation module (18); the coal line A set coal quantity calculation module (18) is digitally connected with the coal line A coal quantity adjusting valve controller (19); and the coal line A coal quantity adjusting valve controller (19) is digitally connected with the A line coal flow adjusting valve. The coal line B coal quantity regulating unit is composed of a coal line B oxygen-coal ratio correction module (21), a coal line B oxygen-coal ratio limiting module (22), a coal line B set coal quantity calculation module (23), a coal line B coal quantity regulating valve controller (24) and a coal line B oxygen-coal ratio correction value input module (25). The coal line B oxygen-coal ratio correction module (21) is digitally connected with the oxygen-coal ratio ramp function module (15), the coal line B oxygen-coal ratio limiting module (22) and the coal line B oxygen-coal ratio correction value input module (25) respectively. The coal line B oxygen-coal ratio limiting module (22) is digitally connected with the coal line B set coal quantity calculation module (23). The coal line B set coal quantity calculation module (23) is digitally connected with the coal line B coal quantity regulating valve controller (24). The coal line B coal quantity regulating valve controller (24) is digitally connected with the B line coal flow regulating valve. The coal line C coal quantity regulating unit is composed of a coal line C oxygen-coal ratio correction module (26), a coal line C oxygen-coal ratio limiting module (27), a coal line C set coal quantity calculation module (28), a coal line C coal quantity regulating valve controller (29) and a coal line C oxygen-coal ratio correction value input module (30). The coal line C oxygen-coal ratio correction module (26) is digitally connected with the oxygen-coal ratio ramp function module (15), the coal line C oxygen-coal ratio limiting module (27) and the coal line C oxygen-coal ratio correction value input module (30) respectively. The coal line C oxygen-coal ratio limiting module (27) is digitally connected with the coal line C set coal quantity calculation module (28). The coal line C set coal quantity calculation module (28) is digitally connected with the coal line C coal quantity regulating valve controller (29). The coal line C coal quantity regulating valve controller (29) is digitally connected with the C line coal flow regulating valve.

2. A control method of an oxygen-coal load control system of a gasifier, characterized by, The method comprises the following steps: 1) Load distribution unit input: The set oxygen load is manually input through the oxygen load input setting module (1). The input oxygen load setting value enters the oxygen load ramp function module (2). The function of the ramp function module is that when the load setting changes, the ramp function can change from the original set load to the newly set load at a predetermined rate. The output of the oxygen load ramp function module (2) enters the oxygen load limiting module (3) to ensure that the set oxygen load is within the range of the process design. The output of the oxygen load limiting module (3) is used as the setting value of the oxygen valve controller to control the oxygen main regulating valve. The actual oxygen flow from the field enters the taking maximum module (6) after being multiplied by a coefficient through the real-time oxygen quantity coefficient module (5). The output of the taking maximum module (6) is the larger one of the output of the real-time oxygen quantity coefficient module (5) and the output value of the oxygen load limiting module (3). In the oxygen load distribution module (7), the three parts are evenly distributed into the coal line A coal quantity regulating unit, the coal line B coal quantity regulating unit and the coal line C coal quantity regulating unit respectively; 2) Oxygen-coal ratio regulating unit input: The oxygen-coal ratio adjusting unit has automatic and manual modes. In the manual mode, the oxygen-coal ratio value is set in the manual oxygen-coal ratio input module (12), then enters the manual oxygen-coal ratio limiting module (13) to prevent the manually input oxygen-coal ratio from exceeding the design range, and then enters the manual / automatic mode selection module (14). In the automatic mode, the real-time oxygen flow from the site is used to obtain an oxygen-coal ratio corresponding to the current oxygen load through the load-oxygen-coal ratio preset function module (8). The value is added to the oxygen-coal ratio correction value from the automatic oxygen-coal ratio correction value input module (10) in the oxygen-coal ratio correction module (9), and then the corrected value is added to the automatic oxygen-coal ratio limiting module (11), and then reaches the manual / automatic mode selection module (14). The output of the manual / automatic mode selection module (14) enters the oxygen-coal ratio ramp function module (15), so that the original set oxygen-coal ratio changes to the newly set oxygen-coal ratio at a predetermined rate. The output of the oxygen-coal ratio ramp function module (15) enters the coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit, and the coal line C coal quantity adjusting unit to participate in the control of the coal quantity of the coal line. 3) Coal line A coal quantity adjusting unit input: The total oxygen-coal ratio of the gasifier from the oxygen-coal ratio adjusting unit oxygen-coal ratio ramp function module (15) and the coal line A oxygen-coal ratio correction value from the coal line A oxygen-coal ratio correction value input module (20) are added in the coal line A oxygen-coal ratio correction module (16), and then enter the coal line A oxygen-coal ratio limiting module (17). Then, together with the set oxygen quantity from the oxygen load distribution module (7) in the load distribution unit, it enters the coal line A set coal quantity calculation module (18). The coal line A set coal quantity calculation module (18) divides the set oxygen quantity by the oxygen-coal ratio to obtain the coal quantity set value of the coal line A under the current set load, which enters the coal line A coal quantity adjusting valve controller (19) to automatically control the A line coal flow regulating valve on site. 4) Coal line B coal quantity adjusting unit input: The total oxygen-coal ratio of the gasifier from the oxygen-coal ratio adjusting unit oxygen-coal ratio ramp function module (15) and the coal line B oxygen-coal ratio correction value from the coal line B oxygen-coal ratio correction value input module (25) are added in the coal line B oxygen-coal ratio correction module (21), and then enter the coal line B oxygen-coal ratio limiting module (22). Then, together with the set oxygen quantity from the oxygen load distribution module (7) in the load distribution unit, it enters the coal line B set coal quantity calculation module (23). The coal line B set coal quantity calculation module (23) divides the set oxygen quantity by the oxygen-coal ratio to obtain the coal quantity set value of the coal line B under the current set load, which enters the coal line B coal quantity adjusting valve controller (24) to automatically control the B line coal flow regulating valve on site. 5) Coal line C coal quantity adjusting unit input: The total oxygen-coal ratio from the oxygen-coal ratio slope function module (15) of the oxygen-coal ratio adjusting unit and the coal line C oxygen-coal ratio correction value from the coal line C oxygen-coal ratio correction value input module (30) are added and corrected in the coal line C oxygen-coal ratio correction module (26), then enter the coal line C oxygen-coal ratio limiting module (27), and then enter the coal line C set coal quantity calculation module (28) together with the set oxygen quantity from the oxygen load distribution module (7) in the load distribution unit, the coal line C set coal quantity calculation module (28) divides the set oxygen quantity by the oxygen-coal ratio to obtain the coal quantity set value of the coal line C under the current set load, which enters the coal line C coal quantity regulating valve controller (29) to automatically control the C line coal flow regulating valve on site.

3. The control method of an oxygen-to-coal ratio control system of a gasifier according to claim 2, characterized by: The large module (6) uses oxygen flow as the parameter of load control, adopts the mode of combining real-time oxygen quantity with set oxygen quantity in the oxygen load distributed to the coal line, and prevents the gasifier from being over-oxygenated.

4. The control method of an oxygen-to-coal ratio control system of a gasifier according to claim 2, characterized by: The A line coal flow regulating valve automatic control, B line coal flow regulating valve automatic control, and C line coal flow regulating valve automatic control are set in the oxygen load input setting module (1) and the automatic oxygen-coal ratio correction value input module (10), so that the automatic adjustment of the coal quantity of the coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit, and the coal line C coal quantity adjusting unit according to the set load and oxygen-coal ratio can be realized.

5. The control method of an oxygen-to-coal ratio control system of a gasifier according to claim 2, characterized by: The oxygen-coal ratio adjusting unit is provided with a manual and automatic mode, the automatic mode adopts the mode of operating the load-oxygen-coal ratio pre-preparation function module (8) and the automatic oxygen-coal ratio limiting module (11), and in the manual operation mode, the gasifier oxygen-coal ratio is directly manually input in the manual oxygen-coal ratio input module (12).

6. The control method of an oxygen control coal load control system of a gasifier according to claim 2, characterized by: The load slope function module (2) and the oxygen-coal ratio slope function module (15) can automatically adjust the load and oxygen-coal ratio of the gasifier according to the set rate when adjusting.

7. The control method of an oxygen-to-coal ratio control system of a gasifier according to claim 2, characterized by: The coal line A coal quantity adjusting unit, the coal line B coal quantity adjusting unit, and the coal line C coal quantity adjusting unit are respectively provided with the coal line A oxygen-coal ratio correction value input module (20), the coal line B oxygen-coal ratio correction value input module (25), and the coal line C oxygen-coal ratio correction value input module (30), so that the oxygen-coal ratio of a single coal line can be adjusted again according to the actual operation of each coal line.

8. The control method of an oxygen control coal load control system of a gasifier according to claim 2, characterized by: The oxygen load input setting module (1), the automatic oxygen-coal ratio correction value input module (10), the manual oxygen-coal ratio input module (12), the coal line A oxygen-coal ratio correction value input module (20), the coal line B oxygen-coal ratio correction value input module (25), and the coal line C oxygen-coal ratio correction value input module (30) are all provided with a quick increase and decrease function.

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