Online calculation and control method of gasifier ash melt viscosity

Abstract

The invention provides an online calculation and control method for gasifier ash melt viscosity, which is applied to safety and reliability control of gasification reaction of a gasifier production system. Comprising the following steps that S11, coal quality online ash component analysis time series data (D1), gasification coarse slag characteristic time series data (D3), gasification fine ash characteristic time series data (D4) and gasification furnace feeding oxygen amount and oxygen-coal ratio time series data (D7) are collected; s12, calculating the ash viscosity through a gasification ash viscosity calculation module (D5) in combination with a coal ash melt standard database (D2) to obtain an actual viscosity characteristic value (D6) of the collected coal quality sample in the gasification furnace; and S13, judging whether the viscosity characteristic value satisfies a safe operation condition that eta is greater than or equal to 5 and less than or equal to 25 Pa.s, if so, sending a'safe operation instruction 'to the intelligent control center, and if not, adjusting the oxygen-coal ratio until the viscosity characteristic value satisfies a viscosity safe operation boundary.

Description

TECHNICAL FIELD

[0001] The present application relates to a gasification furnace ash slag melt, in particular to an online calculation and control method of gasification furnace ash slag melt viscosity. BACKGROUND

[0002] The ash slag melt viscosity has a significant influence on the operation stability and safety of the entrained flow bed gasification furnace. In the entrained flow bed gasification process, the coal ash viscosity is a key parameter affecting the operation safety and reliability of the gasification furnace. The appropriate ash slag melt viscosity not only affects the smooth slagging of the gasification furnace, which is the guarantee for the safe operation of slag resistance, but also affects the smooth slagging of the gasification furnace, which is the guarantee for the continuous, stable and reliable operation of the gasification furnace.

[0003] From the perspective of stability, the viscosity of the ash slag melt plays a key role in whether it can form a stable slag layer and thus ensure the stable operation of the gasification furnace. Only the ash slag melt with moderate viscosity can form a stable slag layer to ensure the smooth operation of the gasification furnace. If the viscosity is too low, it will be difficult to build a stable slag protection layer, which will easily lead to heat transfer deterioration and thus damage the stability of the gasification furnace operation. If the viscosity is too high, the flowability of the molten slag will be poor, which will hinder its normal discharge and cause fluctuations in the operating pressure of the gasification furnace. In severe cases, it may even trigger an emergency shutdown program, which will have a serious impact on the continuity and stability of production.

[0004] From the safety aspect, too low viscosity of the ash slag melt will intensify the erosion of the refractory material when the slag collapses, thus affecting the safety of the equipment operation. Too high viscosity of the ash slag melt will break the temperature distribution and pressure balance in the gasification furnace when the slag is blocked. The imbalance of temperature distribution will lead to the formation of local high temperature area, accelerate the erosion and damage of the refractory bricks, and increase the risk of equipment rupture and leakage. In addition, if improper measures are taken after the slag is blocked, such as suddenly increasing the oxygen flow or increasing the operating temperature to reduce the viscosity of the ash slag melt and improve the flowability of the ash, the unvaporized coal powder or combustible gas may reach the explosion limit, causing fire or explosion accidents.

[0005] In the actual operation of the entrained flow bed gasification furnace, the operating temperature of the gasification furnace is usually adjusted according to the viscosity-temperature characteristics of the coal to ensure that the viscosity of the slag is within the stable operation window of the slag layer, and to ensure the stability and safety of the gasification furnace operation. The viscosity operation window generally needs to be controlled between 5-25 Pa·s, and the gasification furnace operating temperature range corresponding to this viscosity range is generally controlled at ΔT>50℃. Therefore, the calculation of the gasification furnace ash slag melt viscosity is an important prerequisite and guarantee for the quantitative realization of the safe and stable operation of the gasification furnace in the production process.

[0006] At present, the ash melt viscosity data of the entrained-flow gasification furnace is obtained by relying on laboratory test or data regression method. The time period of the method one generally needs several days, which cannot meet the real-time requirement of production. The method two can only be applied to the coal types within the sample space range of regression analysis or small range expansion under limited conditions. The method has narrow application range, poor universality, and poor ability to adapt to coal quality fluctuation and operation condition fluctuation. SUMMARY

[0007] The application provides an online calculation and control method for the ash melt viscosity of a gasification furnace, solves the problem that the viscosity value can only be obtained by relying on a data regression method in the industry, and solves the real-time, accuracy and universality problems of the ash melt viscosity data. The technical scheme is as follows:

[0008] An online calculation and control method for the ash melt viscosity of a gasification furnace is applied to a gasification furnace production system and comprises the following steps.

[0009] S11: collecting coal quality online ash component analysis time series data (D1), gasification coarse slag characteristic time series data (D3), gasification fine ash characteristic time series data (D4), and gasification furnace oxygen content and oxygen-coal ratio time series data (D7);

[0010] S12: combining a coal ash melt standard database (D2), calculating the ash slag viscosity through a gasification ash slag viscosity calculation module (D5), and obtaining the actual viscosity characteristic value (D6) of the collected coal sample in the gasification furnace;

[0011] S13: judging whether the viscosity characteristic value meets the safety operation condition of 5Pa·s≤η≤25Pa·s, sending a "safe operation instruction" to an intelligent control center if the condition is met, and adjusting the oxygen-coal ratio until the viscosity characteristic value meets the safety operation boundary if the condition is not met; wherein η represents the viscosity.

[0012] Further, in the step S11, the data source of the coal quality online ash component analysis time series data (D1) is a coal quality online analyzer of the gasification furnace production system. The coal quality online analyzer samples from a pulverized coal atmospheric storage bin to obtain the contents of carbon, hydrogen, oxygen, nitrogen, sulfur, SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2, that is, the ash component X fed into the furnace.

[0013] Further, in the step S11, the data source of the gasification coarse slag characteristic time series database (D3) is a coarse slag sampling point of the gasification furnace production system. The coarse slag sampling point samples from a slag extractor to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2, that is, the slag component Y.

[0014] Further, in step S11, the data source of the gasification fine ash characteristic time series database (D4) is the fine ash sampling point of the gasification furnace production system, which is sampled from the ash water treatment system to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2, and TiO2, i.e., the fine ash component Z.

[0015] Further, in step S11, the gasification furnace oxygen content and oxygen-coal ratio time series data (D7) are given by the gasification furnace DCS control system, and the average operation temperature T g corresponds one by one.

[0016] Further, in step S12, the gasification ash slag viscosity calculation module (D5) is based on the fact that viscosity is a function of ash slag components and temperature, i.e., viscosity η = f(Y or Z, T g ), where η is the ash slag viscosity value in the gasification furnace, Y is the molten slag component, Z is the fine ash component, and T g is the gasification furnace temperature.

[0017] In the same period t, the data collection at different stages of the pulverized coal reaction in the gasification furnace production system has a time sequence correspondence, i.e., the collected data correspond to the performance of the same coal sample at different process stages:

[0018] That is, the pulverized coal enters the pulverized coal atmospheric storage silo at T0, and the data collection obtains the coal quality online ash component analysis time series data (D1);

[0019] The pulverized coal enters the gasification furnace at T1, and the data collection obtains the gasification furnace oxygen content and oxygen-coal ratio time series data (D7);

[0020] The pulverized coal reacts in the gasification furnace, and the reacted coarse slag enters the slag conveyor at T2, and the data collection obtains the gasification coarse slag characteristic time series data (D3);

[0021] The pulverized coal reacts in the gasification furnace, and the reacted fine ash enters the ash water treatment system at T3, and the data collection obtains the gasification fine ash characteristic time series data (D4).

[0022] Further, first, a time stamp T1 is established, which corresponds to the gasification furnace oxygen content and oxygen-coal ratio time T1; the time length of the pulverized coal detected by the coal quality online detection and transmitted to the gasification furnace is t2, the time length of the coarse slag discharged from the gasification furnace is t3, and the time length of the fine ash discharged from the gasification furnace is t4, and the data time sequence calculation method is as follows:

[0023] t2 refers to the time of the coal powder from the position of detecting the coal quality to the gasification furnace, which is related to the sequence control operation time of the lock hopper, the current coal powder feeding tank level, and the gasification furnace coal powder pipeline flow,

[0024] t2 = Tcyc + V / F,

[0025] Wherein Tcyc = T(n)-T(n-1), T(n) and T(n-1) are the current and last time of the lock hopper recorded by the DCS lock hopper sequence control program;

[0026] V is the volume of the current coal powder feeding tank (which can be calculated according to the powder coal feeding tank level);

[0027] F is the sum of the current powder pipeline flow.

[0028] t3 refers to the time length of the coarse slag generated by the gasification furnace, which is about 0.5h;

[0029] t4 refers to the time length of the fine ash generated by the gasification furnace to the filter cake treatment equipment, which is about 3.5h.

[0030] Further, the gasification furnace production system comprises a powder coal atmospheric storage bin, a powder coal lock hopper, a powder coal feeding tank and a gasification furnace connected in sequence, the powder coal atmospheric storage bin is connected with a coal quality online analyzer; the top of the gasification furnace is used for inputting powder coal, oxygen and carbon dioxide; the middle part is connected with a synthesis gas separation washing tower, the synthesis gas separation washing tower is connected with a synthesis gas component analyzer, the gasification furnace and the synthesis gas separation washing tower are both connected with an ash and slag water treatment system, the ash and slag water treatment system is provided with a fine ash sampling point; the bottom of the gasification furnace is connected with a slag conveyer through a slag lock hopper, and the slag conveyer is provided with a coarse slag sampling point.

[0031] The online calculation method of the ash and slag melt viscosity characteristics of the gasification furnace is based on the time sequence database obtained by the online analysis of the coal quality ash and the characteristic database of the gasification coarse slag and fine ash, driven by the melt mechanism and AI model algorithm, and the calculated melt viscosity is accurate and reliable, which is an effective method for guiding the safe and reliable operation of the gasification furnace, and the calculated viscosity has the characteristics of strong universality, high accuracy, wide application range and no limitation of coal type.

[0032] The melt viscosity calculation data characteristic value realized by the present application is obtained by correcting the input and output data of the gasification furnace under the support of the ash and slag mechanism calculation model and the standard database, and can be reliably used to guide the safe production, reliable operation and intelligent control of the gasification furnace. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a process flow diagram of the gasification furnace process system;

[0034] Figure 2 is a block diagram of the online calculation and control method of the gasification ash and slag melt viscosity characteristics;

[0035] Figure 3This is a flowchart of the online calculation program for the viscosity-temperature characteristics of the gasifier ash melt;

[0036] Figure 4 It is a diagram showing the correspondence between the location, time, and sequence of the aforementioned process.

[0037] Figure 5 This is the data format table of the online ash composition analysis time series database for coal described in the embodiments;

[0038] Figure 6 This is the data format table of the time-series database of gasification coarse slag characteristics described in the embodiment;

[0039] Figure 7 This is the data format table of the time-series database of gasification fine ash characteristics described in the embodiment. Detailed Implementation

[0040] like Figure 1 As shown, the gasification furnace production system includes a pulverized coal atmospheric pressure storage silo 1, a pulverized coal lock hopper 2, a pulverized coal feed tank 3, and a gasification furnace 4 connected in sequence. The pulverized coal atmospheric pressure storage silo 1 is connected to an online coal quality analyzer 6, and the pulverized coal feed tank 3 is connected to multiple gasification furnaces 4. A pulverized coal flow meter 9 is installed between the pulverized coal feed tank 3 and the gasification furnace 4.

[0041] The top of the gasifier 4 is used to input pulverized coal, oxygen, and carbon dioxide; the middle part is connected to the syngas separation and scrubbing tower 5, which is connected to the syngas component analyzer 7. Both the gasifier 4 and the syngas separation and scrubbing tower 5 are connected to the ash and slag water treatment system 11, which is equipped with a fine ash sampling point; the bottom of the gasifier 4 is connected to the slag remover 10 through the slag lock hopper 8, which is equipped with a coarse slag sampling point.

[0042] During operation, the pulverized coal in the atmospheric pressure storage silo 1 is analyzed by the online coal quality analyzer 6, and then enters the gasifier 4 through the pulverized coal lock hopper 2 and the pulverized coal feeder 3. After the reaction in the gasifier 4, the syngas enters the syngas separation and washing tower 5, the ash and slag water enters the ash and slag water treatment system 11, and the ash and slag enter the slag removal machine 10 through the slag lock hopper 8.

[0043] The time required for setting a period from the coal powder entering the coal powder atmospheric storage bin 1 to the completion of the reaction of the coal powder to the discharge of the ash and slag of the gasification furnace is t. The input of the gasification furnace 4 includes the coal powder, oxygen, steam and carbon dioxide protective gas, and the output includes the fine ash, coarse slag and synthetic gas. The material conveying speed from the coal powder atmospheric storage bin 1 to the gasification furnace 4 is accurately calculated, and the reaction speed of the gasification furnace 4 is stable. Therefore, the corresponding relationship between the input and the output can be obtained according to the law of conservation of mass and the mechanism model of the coal ash gas-solid reaction. First, a time stamp T1 corresponding to the time sequence T1 of the oxygen amount entering the gasification furnace and the oxygen-coal ratio is established. In the period t, the time length of the coal powder from entering the coal powder atmospheric storage bin 1 to the coal powder being transmitted to the gasification furnace detected by the coal quality on-line detection is t2, the time length of the coarse slag generated by the gasification furnace being discharged is t3, and the time length of the fine ash generated by the gasification furnace being discharged is t4. Then, according to the components of the input and the output, the proportion and the component of the molten slag and the fine ash in the gasification furnace can be calculated, so as to obtain the ash and slag viscosity characteristic value corresponding to the actual production, and to judge whether the viscosity characteristic value satisfies the safety operation condition of 5≤η≤25Pa·s, wherein η represents the viscosity. If it is satisfied, the "safe operation instruction" is sent to the intelligent control center. If it is not satisfied, the oxygen-coal ratio is adjusted to adjust the temperature of the gasification furnace until the viscosity characteristic value satisfies the safety operation boundary, so as to realize the quantitative control of the safety and reliability of the gasification process of the gasification furnace.

[0044] As shown in Figure 2 The present application is a melt viscosity calculation method based on time sequence data. The data are all associated based on time sequence characteristics, and the data acquisition is as follows:

[0045] S1: Collecting coal quality on-line ash component analysis time sequence data (D1), the data source of the coal quality on-line ash component analysis time sequence data (D1) is a coal quality on-line analyzer 6, the coal quality on-line analyzer 6 samples from the coal powder atmospheric storage bin 1 to obtain the contents of carbon, hydrogen, oxygen, nitrogen, sulfur, SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2;

[0046] S2: Collecting gasification coarse slag characteristic time sequence data (D3), the data source is a coarse slag sampling point, the coarse slag sampling point samples from a slag extractor 10 to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2;

[0047] S3: Collecting gasification fine ash characteristic time sequence data (D4), the data source is a fine ash sampling point, the fine ash sampling point samples from an ash and slag water treatment system 11 to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2;

[0048] S4: collecting the time series data of oxygen content and oxygen / coal ratio of the gasifier (D7), which is given by the DCS control system of the gasifier and is corresponding to the average operating temperature T of the gasifier g one-to-one correspondence;

[0049] In summary, the time series of the coal quality online ash component analysis (D1), the gasification coarse slag characteristic time series data (D3), the gasification fine ash characteristic time series data (D4), the gasification furnace oxygen content and oxygen / coal ratio time series data (D7) and the gasification ash slag viscosity calculation module (D5) are corresponding to the actual viscosity characteristic value (D6) of the gasification furnace, and the data collection in different stages of the pulverized coal reaction in the gasification furnace production system in the same period t is corresponding:

[0050] That is, the pulverized coal enters the pulverized coal atmospheric storage bin 1 at T0 moment of period t, and the coal quality online ash component analysis time series data (D1) is collected;

[0051] The pulverized coal enters the gasifier 4 at T1 moment of period t, and the gasification furnace oxygen content and oxygen / coal ratio time series data (D7) is collected;

[0052] The pulverized coal reacts in the gasifier 4, and the coarse slag after reaction enters the slag extractor 10 at T2 moment of period t, and the gasification coarse slag characteristic time series data (D3) is collected;

[0053] The pulverized coal reacts in the gasifier 4, and the fine ash after reaction enters the ash water treatment system 11 at T3 moment of period t, and the gasification fine ash characteristic time series data (D4) is collected;

[0054] In this way, the data at different moments in the same period t are processed correspondingly, and the relationship between the time series data is established, so that the accurate calculation of the gasification furnace ash slag viscosity temperature characteristic value is realized.

[0055] As shown in Figure 3 The data and calculation modules involved in the present application include the following contents: coal quality online ash component analysis time series data (D1), coal ash melt standard data (D2), gasification coarse slag characteristic time series data (D3), gasification fine ash characteristic time series data (D4), gasification ash slag viscosity calculation module (D5), gasification ash slag viscosity characteristic value (D6), gasification furnace oxygen content and oxygen / coal ratio time series data (D7).

[0056] The data processing process includes the following steps:

[0057] S11: collecting the coal quality online ash component analysis time series data (D1), the gasification coarse slag characteristic time series data (D3), the gasification fine ash characteristic time series data (D4), and the gasification furnace oxygen content and oxygen / coal ratio time series data (D7);

[0058] S12: Combining the coal ash melt standard database (D2), the ash slag viscosity is calculated by the gasification ash slag viscosity calculation module (D5), and the actual viscosity characteristic value (D6) of the collected coal sample in the gasification furnace is obtained;

[0059] S13: judging whether the viscosity characteristic value meets the safety operation condition of 5≤η≤25Pa·s, if yes, the "safe operation instruction" is sent to the intelligent control center, and if not, the oxygen-coal ratio is adjusted to adjust the gasification furnace temperature until the viscosity characteristic value meets the safety operation boundary;

[0060] The coal ash melt standard database (D2) is a standard physical database of ash content, and the gasification ash slag viscosity calculation module (D5) can be directly called;

[0061] The gasification ash slag viscosity calculation module (D5) is based on the function that the viscosity is the function of ash slag components and temperature, that is, the viscosity η=f(Y or Z, T g ) ash slag viscosity value, wherein η is the ash slag viscosity value in the gasification furnace, Y is the molten slag component, which is measured according to the gasification coarse slag characteristic time series data (D3), Z is the fine ash component, which is measured according to the gasification fine ash characteristic time series data (D4), and T g is the gasification furnace temperature. The detailed calculation program structure of the viscosity is shown in the attached Figure 3 .

[0062] In the embodiment, the coal quality online ash component analysis time series data (D1) is collected, the mass percentage of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2 in the ash content is analyzed by the coal quality online analyzer 6, and the data structure is as shown in Figure 5 .

[0063] The coarse slag discharged by the slag lock hopper of the gasification furnace is sampled every 0.5h, the SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2 component compositions of the coarse slag are analyzed, and the gasification coarse slag characteristic time series data (D3) corresponding to the lock hopper discharge time is established, and the data structure is as shown in Figure 6 .

[0064] The fine ash filtered by the gasification ash water system is sampled every 3.5h, the SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2 component compositions of the coarse slag are analyzed, and the gasification fine ash characteristic time series data (D4) corresponding to the sampling time is established, and the data structure is as shown in Figure 7 .

[0065] The parameters related to the present application are defined as follows:

[0066] (1) Time sequence definition

[0067] Time stamp T1, corresponding to the time sequence T1 of the oxygen content and oxygen-coal ratio of the gasifier;

[0068] Time sequence T0 of online ash analysis of coal quality;

[0069] Time sequence T2 of gasification coarse slag characteristics;

[0070] Time sequence T3 of gasification fine ash characteristics.

[0071] (2) Transmission time

[0072] The time length t2 of the pulverized coal detected by the online detection of the coal quality to the gasifier;

[0073] The time length t3 of the coarse slag produced by the gasifier to be discharged;

[0074] The time length t4 of the fine ash produced by the gasifier to be discharged to the filter cake treatment equipment.

[0075] (3) Time sequence relationship

[0076] Taking the time stamp T1 as the time base point, the calculation of the time sequence relationship is as follows:

[0077] The calculation period t is <t3-t0>;

[0078] The coal quality detection result is <t1-t2>The parameter at time <T1+t3>;

[0079] The parameter at time <T1+t3>;

[0080] The parameter at time <T1+t4>.

[0081] Therefore, the online ash analysis data of coal quality, the gasification coarse slag characteristic data and the gasification fine ash characteristic data, and the data corresponding relationship of the oxygen content of the gasification furnace and the oxygen-coal ratio are obtained, so that the logical correlation of the calculation related data of the gasification furnace ash slag melt viscosity is realized.

[0082] The corresponding relationship of the position, time and sequence of the above process is shown in the following table Figure 4 .

[0083] The present application has the following advantages:

[0084] (1) Based on the online analysis data of coal ash composition, and corrected by the coarse slag characteristic data and the fine ash characteristic data, the coal ash melt viscosity-temperature characteristic data is calculated through the mechanism model, the call of the melt thermodynamics and the fluid mechanics standard database of coal ash composition, the results can reflect the imbalance of the ash slag reaction in the production practice, and the results have strong universality compared with the regression model calculation method.

[0085] (2) On the basis of the mechanism model calculation results, the melt standard database and the production sequence database can be further corrected by using the AI big data model, and the viscosity calculation results are accurate and reliable.

[0086] (3) The oxygen-coal ratio of the gasification furnace is associated with the ash slag melt viscosity-temperature characteristic value and the operation window (5Pa.s), and the safety and reliability of the automatic quantitative control of the gasification furnace slag hanging and slag discharge is realized, and the control has the intelligent characteristics.

Claims

1. An online calculation and control method for the viscosity of molten ash from a gasifier, applied to a gasifier production system, characterized in that, Includes the following steps: S11: Collect online ash composition analysis time series data of coal (D1), gasification coarse slag characteristic time series data (D3), gasification fine ash characteristic time series data (D4), and gasifier oxygen content and oxygen-coal ratio time series data (D7). S12: Combining the coal ash melt standard database (D2), the viscosity of the ash is calculated through the gasification ash viscosity calculation module (D5) to obtain the actual viscosity characteristic value of the collected coal sample in the gasifier (D6). S13: Determine whether the viscosity characteristic value meets the safe operating condition of 5≤η≤25Pa·s. If it does, send the "safe operating instruction" to the intelligent control center. If it does not, adjust the oxygen-coal ratio until the viscosity characteristic value meets the viscosity safe operating boundary, where η represents viscosity.

2. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 1, characterized in that: In step S11, the data source of the online ash composition analysis time series data (D1) of the coal is the online coal quality analyzer of the gasifier production system. The online coal quality analyzer samples from the pulverized coal atmospheric pressure storage silo to obtain the contents of carbon, hydrogen, oxygen, nitrogen, sulfur, SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2, and TiO2.

3. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 1, characterized in that: In step S11, the data source of the gasification coarse slag characteristic time series data (D3) is the coarse slag sampling point of the gasifier production system. The coarse slag sampling point is sampled from the slag remover to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2, and TiO2.

4. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 1, characterized in that: In step S11, the data source of the gasification fine ash characteristic time series data (D4) is the fine ash sampling point of the gasifier production system. The fine ash sampling point is sampled from the ash slag water treatment system to obtain the contents of SiO2, CaO, Al2O3, MgO, Fe2O3, K2O, Na2O, MnO2 and TiO2.

5. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 1, characterized in that: In step S12, the gasification ash viscosity calculation module (D5) is based on the fact that viscosity is a function of ash composition and temperature, i.e., viscosity η = f(Y or Z, T). g ), where Y is the slag component, measured based on time-series data of gasification coarse slag characteristics (D3), Z is the fine ash component, measured based on time-series data of gasification fine ash characteristics (D4), and T g This refers to the temperature of the gasifier.

6. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 1, characterized in that: Within the same period t, the data collected at different stages of the reaction of pulverized coal in the gasification furnace production system are corresponding, that is: Pulverized coal enters the pulverized coal atmospheric pressure storage silo at time T0 of period t, and the time series data of online ash composition analysis of coal quality (D1) are collected. Pulverized coal enters the gasifier at time T1 of period t, and the time series data of oxygen content and oxygen-to-coal ratio in the gasifier are collected (D7). Pulverized coal reacts in a gasifier, and the coarse slag after the reaction enters the slag remover at time T2 of period t. Data collection captures the time series data of the gasification coarse slag characteristics (D3). Pulverized coal reacts in a gasifier, and the resulting fine ash enters the ash and slag water treatment system at time T3 of period t. Data collection yielded time-series data on the characteristics of the gasified fine ash (D4).

7. The method for online calculation and control of the viscosity of gasifier ash melt according to claim 6, characterized in that... Through timing calculations, the logical relationships between data are aligned, as follows: (1) Define timing First, a timestamp T1 is established, corresponding to the time sequence T1 of oxygen quantity and oxygen-coal ratio entering the gasifier; Coal online ash content analysis time series T0; Gasification coarse slag characteristic time series T2; Gasification fine ash characteristic timing T3; (2) Transmission time The time taken for pulverized coal detected online to be transported to the gasifier is t2; The time taken for the coarse slag produced by the gasifier to be discharged is t3; The time it takes for the fine ash produced by the gasifier to be discharged to the filter cake treatment equipment is t4; (3) Temporal relationship Using timestamp T1 as the time base point, the time series relationship is calculated as follows: the calculation period t is... <t3-t0> ；< / t3-t0> The coal quality test results are as follows: <t1-t2>Parameters at time;< / t1-t2> The results of the coarse residue are as follows:<T1+t3> Parameters at time; The filter cake result is as follows:<T1+t4> The parameters at that time.

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