A Zhundong coal blending system and method

Abstract

The present invention discloses a Zhundong coal blending system and method, which realizes the precise proportioning of blending materials by using a bunker and a feeding belt, and determines the simulated combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding equipment and the first blending ratio among the Zhundong coal, raw coal, and blending materials. If the simulated combustion result meets the preset conditions, the coal feeding amount of the Zhundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment, and the feeding amount of the feeding equipment are controlled according to the first blending ratio, so as to realize precise coal blending, avoid boiler coking under the condition of ensuring the maximum blending ratio of Zhundong coal, and ensure the economic benefits of the power plant.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal blending in coal mines, and particularly relates to a Zhundong coal blending system and method. Background Art

[0002] Due to its price advantage and rich reserves, Zhundong coal is the coal type designed for and actually used in most power plant boilers. The characteristics of Zhundong coal are high moisture content, medium calorific value, easy ignition, strong coking, high alkali metals, strong fouling property, and relatively large differences in ash melting points among different mines. Therefore, there is a risk of boiler coking when burning a high proportion of Zhundong coal.

[0003] A common method for power plants to burn Zhundong coal is to blend and burn Zhundong coal with raw coal (such as shaft coal) and admixtures (KAO, substances other than coal) in a certain proportion. However, in the prior art, there is a problem that the boiler coking is serious and the unit is forced to shut down due to improper control of the blending ratio. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a Zhundong coal blending system and method to solve the problem that the boiler coking is serious and the unit is forced to shut down due to improper control of the blending ratio.

[0005] In a first aspect, the embodiments of the present invention provide a Zhundong coal blending system, including: a Zhundong coal feeding device, a raw coal feeding device, a feeding device, and a simulation control device;

[0006] The Zhundong coal feeding device includes: a first coal feeder and a first coal conveying belt, and the first coal feeder is arranged above the input end of the first coal conveying belt;

[0007] The raw coal feeding device includes: a second coal feeder and a second coal conveying belt, the second coal feeder is arranged above the input end of the second coal conveying belt, and the output end of the second coal conveying belt is arranged above the first coal conveying belt;

[0008] The feeding device includes: a bin for carrying the admixture and a material conveying belt, the input end of the material conveying belt is arranged below the bin, and the output end of the material conveying belt is arranged above the first coal conveying belt;

[0009] The simulation control device is used to determine the simulation combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device and the first blending ratio among Zhundong coal, raw coal, and the admixture; if the simulation combustion result meets the preset conditions, control the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device, and the feeding amount of the feeding device according to the first blending ratio.

[0010] Wherein, a belt scale is arranged in the material conveying belt.

[0011] Wherein, the maximum output value of the material conveying belt is 150 t / h.

[0012] Among them, the coal conveying belt or the material conveying belt includes: main and standby belts; the coal conveying belt is the first coal conveying belt or the second coal conveying belt.

[0013] Among them, the first coal feeder includes: an impeller coal feeder.

[0014] Among them, the second coal feeder includes: an impeller coal feeder or a bunker.

[0015] Among them, the Zhundong coal blending system further includes: a bucket wheel reclaimer, and the output end of the first coal conveying belt is arranged above the bucket wheel reclaimer.

[0016] In a second aspect, an embodiment of the present invention further provides a Zhundong coal blending method, including:

[0017] Determine the simulated combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding equipment, and the first blending ratio among the Zhundong coal, the raw coal, and the blending material;

[0018] If the simulated combustion result meets the preset conditions, control the coal feeding amount of the Zhundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment, and the feeding amount of the feeding equipment according to the first blending ratio.

[0019] Among them, the coking parameters include at least one of the following parameters: acid-base ratio, silicon-aluminum ratio, equivalent of sodium oxide and potassium oxide, content of ferric oxide, and content of calcium oxide.

[0020] Among them, the first blending ratio is: the ratio of Zhundong coal to raw coal is 7:1, and the ratio of Zhundong coal to the blending material is 6:1.

[0021] Among them, the combustion result includes: furnace temperature, furnace outlet temperature, and high-pressure superheater temperature;

[0022] Among them, if the simulated combustion result meets the preset conditions, controlling the coal feeding amount of the Zhundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment, and the feeding amount of the feeding equipment according to the first blending ratio includes:

[0023] If the simulated combustion result is: the furnace temperature is less than 1350 °C, the difference between the furnace outlet temperature and 1100 °C is greater than or equal to -50 °C and less than or equal to 50 °C, and the difference between the high-pressure superheater temperature and 860 °C is greater than or equal to -10 °C and less than or equal to 10 °C, control the coal feeding amount of the Zhundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment, and the feeding amount of the feeding equipment according to the first blending ratio.

[0024] Among them, the method further includes:

[0025] If the simulation combustion result is: the furnace temperature is greater than 1400 °C, the furnace outlet temperature is greater than 1150 °C, and the high-pressure superheater temperature is greater than 870 °C, increase the proportion of raw coal and / or admixture in the first co-firing ratio to obtain the second co-firing ratio; determine the simulation combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device and the second co-firing ratio.

[0026] In the Zhundong coal blending system and method provided by the embodiments of the present invention, the precise proportioning of the admixture is achieved by using the silo and the conveying belt, and the simulation combustion result is determined according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device and the first co-firing ratio among the Zhundong coal, raw coal, and admixture; if the simulation combustion result meets the preset conditions, control the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device, and the feeding amount of the feeding device according to the first co-firing ratio, so as to achieve precise coal blending, avoid boiler coking under the condition of ensuring the maximum blending ratio of Zhundong coal, and ensure the economic benefits of the power plant. Brief Description of the Drawings

[0027] Figure 1 It is a structural schematic diagram of the Zhundong coal blending system;

[0028] Figure 2 It is a flow schematic diagram of the Zhundong coal blending method;

[0029] Figure 3 It is another flow schematic diagram of the Zhundong coal blending method.

[0030] Reference Signs

[0031] Zhundong coal feeding device 10; first coal feeder 11; first coal conveying belt 12;

[0032] Raw coal feeding device 20; second coal feeder 21; second coal conveying belt 22;

[0033] Feeding device 30; silo 31; conveying belt 32;

[0034] Simulation control device 40. Detailed Description of the Embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0037] Through analysis, it is found that the reason for the improper control of the blending ratio in the prior art is that the impeller coal feeder claws and the feeding hopper wheel claws in the existing coal blending system are relatively large, resulting in the inability to accurately control the coal feeding amount and the feeding amount of the blending material, with a large deviation and unevenness in the blending ratio, thus causing the problem of boiler coking.

[0038] In order to achieve precise coal blending, the Zhundong coal blending system provided by the embodiments of the present invention utilizes a silo and a conveying belt to achieve the supply of the blending material, thereby accurately controlling the supply amount of the blending material. And, before the formal coal blending, according to the coking parameters of the Zhundong coal sample, as well as the preset blending ratio (i.e., the first blending ratio) among the Zhundong coal, raw coal, and blending material, the embodiments of the present invention determine the optimal blending ratio corresponding to the coking characteristics of the current Zhundong coal to be blended through simulation operations, and control the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device, and the feeding amount of the feeding device according to the determined blending ratio, so as to achieve precise coal blending.

[0039] As Figure 1 shown, the Zhundong coal blending system of the embodiments of the present invention may specifically include: a Zhundong coal feeding device 10, a raw coal feeding device 20, a feeding device 30, and a simulation control device 40.

[0040] The Zhundong coal feeding device 10 may specifically include: a first coal feeder 11 and a first coal conveying belt 12, and the first coal feeder 11 is arranged above the input end of the first coal conveying belt 12.

[0041] The raw coal feeding device 20 may specifically include: a second coal feeder 21 and a second coal conveying belt 22, the second coal feeder 21 is arranged above the input end of the second coal conveying belt 22, and the output end of the second coal conveying belt 22 is arranged above the first coal conveying belt 12.

[0042] The feeding device 30 includes: a silo 31 for carrying the blending material (KAO.) and a conveying belt 32, the input end of the conveying belt 32 is arranged below the silo 31, and the output end of the conveying belt 32 is arranged above the first coal conveying belt 12.

[0043] The simulation control device 40 is used to determine the simulation combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device 10 and the first blending ratio among the Zhundong coal, raw coal, and admixture. If the simulation combustion result meets the preset conditions, the coal feeding amount of the Zhundong coal feeding device 10, the coal feeding amount of the raw coal feeding device 20, and the feeding amount of the feeding device 30 are controlled according to the first blending ratio.

[0044] Based on years of research and exploration, the technical solution of this application finds that the coking characteristics of Zhundong coal are as follows: the acid-base ratio of 0.4 - 0.7 is easy to slag, the silicon-aluminum ratio greater than 1.18 is easy to slag, the equivalent of sodium oxide and potassium oxide greater than 6 is easy to slag, the content of iron sesquioxide greater than 10% is easy to slag, and the calcium oxide greater than 35% is easy to slag.

[0045] Based on the above research results, in the technical solution of this application, the simulation control device 40 imports the coking characteristics of Zhundong coal in advance. When the simulation control device 40 performs simulation operations, according to the coking parameters of the Zhundong coal provided by the Zhundong coal feeding device 10, the coking characteristics of Zhundong coal imported in advance are used to determine the simulation combustion result.

[0046] Combined with the coking characteristics of Zhundong coal, when the blending ratio of Zhundong coal, raw coal, and admixture is out of balance, it may cause serious slagging on the water-cooled wall of the boiler, and large-area sticky slagging and ash accumulation in the high-pressure superheater and low-temperature reheater areas. At the same time, the boiler flue gas temperature, the flue gas pressure and the tube wall temperature of each section change significantly. That is to say, the technical solution of this application finds that the imbalance of the blending ratio of Zhundong coal, raw coal, and admixture will be reflected in the temperature parameters of the boiler. Based on this, the technical solution of this application believes that if the furnace temperature is greater than 1400 °C, the furnace outlet temperature is greater than 1150 °C, the high-pressure superheater temperature is greater than 870 °C, and the furnace temperature remains basically unchanged after soot blowing, it is determined that the coal blending ratio in the current blending and combustion ratio is out of balance, and the proportion of Zhundong coal in the current combustion ratio is too high. Therefore, the proportion of raw coal and / or admixture can be increased to reduce the proportion of Zhundong coal. For example, each time the mixing ratio of raw coal and / or admixture is increased by 1%, and then the changes in the furnace temperature, furnace outlet temperature, and high-pressure superheater temperature are observed again until the furnace temperature is less than 1350 °C, the furnace outlet temperature is maintained at about 1100 °C, and the high-pressure superheater temperature is maintained at about 860 °C. The blending ratio at this time is determined as the final blending ratio, and this blending ratio can be solidified to form a blending card. Subsequently, the coal feeding amount of the Zhundong coal feeding device 10, the coal feeding amount of the raw coal feeding device 20, and the feeding amount of the feeding device 30 can be controlled according to the final blending ratio, so as to achieve precise coal blending and avoid boiler coking while ensuring the maximum blending ratio of Zhundong coal.

[0047] After years of practice, the technical solution of this application can increase the blending ratio of Zhundong coal from the original 80% to 90%. Since there is a benefit of nearly 3 million for every 1% increase in the blending ratio of Zhundong coal, and the technical solution of this application can avoid boiler coking, thereby extending the boiler maintenance time interval. Therefore, the technical solution of this application can bring significant economic benefits to the power plant.

[0048] In the technical solution of this application, the simulation control device 40 involved in this application can be specifically implemented by using existing mature, reliable simulation schemes, software, hardware, and combinations, etc. The specific control method of the simulation control device 40 for other devices can also be implemented by using existing mature, reliable technical schemes, software, hardware, and combinations, etc. In this regard, this application does not make special limitations.

[0049] In a specific embodiment, during the process of the simulation control device 40 performing simulation operations to obtain the simulation combustion result, it can further consider optimal adjustment simulation schemes such as coal mill matching, secondary air damper adjustment, soot blowing coordination, etc. For example, the coal mill matching can be: the ratio of Zhundong coal to raw coal in coal mills A, B, and C is controlled at 7:1, and the ratio of Zhundong coal to the blending material in coal mills D, E, and F is 6:1; the secondary air damper adjustment can be: for the running coal mill, the perimeter opening is maintained at 15% opening, the auxiliary air is maintained between 20% - 35%, the larger the coal amount, the larger the damper opening, and the bottom drag air is maintained at more than 45% opening; the soot blowing coordination can be: if the slag amount of the slag extractor is normal and the furnace temperature rises, soot blowing should be promptly carried out to blow off the small amount of slag and ash deposits on the heating surface. Thus, the accuracy of the simulation combustion result is ensured.

[0050] In an embodiment, in order to accurately control the blending amount of the blending material, a belt scale is provided in the conveying belt 32. The weight information of the blending material obtained by the belt scale is transmitted to the simulation control device 40 so that the simulation control device 40 can detect and control the feeding amount of the feeding device 30. In the embodiment of the present invention, the maximum output value of the conveying belt 32 can be 150t / h.

[0051] In an embodiment, the bunker 31 can specifically further include devices such as a hopper, a sieve, a vibrator, a three-way baffle, etc. The functions and setting characteristics of the above devices can be the same as those in the prior art.

[0052] In order to ensure the normal transmission of coal and materials and facilitate the maintenance of the belt, in an embodiment, the first coal conveying belt 12, the second coal conveying belt 22, and the conveying belt 32 can specifically include main and standby belts.

[0053] The first coal feeder 11 and the second coal feeder 21 involved in the embodiment of the present invention can specifically be impeller coal feeders.

[0054] The technical solution of the embodiment of the present invention can specifically adjust the blending ratio by adjusting the coal feeding amount of raw coal. Therefore, in one embodiment, the second coal feeder 21 involved in the embodiment of the present invention can specifically be a bunker. Further, a belt scale or the like can also be provided in the second coal conveyor belt 22, so as to facilitate the simulation control device 40 to detect and control the coal feeding amount of the raw coal feeding device 20.

[0055] In one embodiment, the Zhundong coal blending system can specifically further include a bucket wheel reclaimer (not shown in the drawings). The output end of the first coal conveyor belt 12 is arranged above the bucket wheel reclaimer, so that the bucket wheel reclaimer can transport the coal for combustion (including Zhundong coal, raw coal and blending materials) obtained by blending coal according to the determined blending ratio after simulation operation to a designated position.

[0056] In the embodiment of the present invention, the output ends of the second coal conveyor belt 22 and the feeding conveyor belt 32 are both arranged above the first coal conveyor belt 12. In this way, the raw coal transported by the second coal conveyor belt 22 and the blending materials transported by the feeding conveyor belt 32 will both fall into the first coal conveyor belt 12 and be naturally mixed with the Zhundong coal transported by the first coal conveyor belt 12, so as to form the final coal for combustion.

[0057] In the embodiment of the present invention, the output end of the first coal conveyor belt 12 can be flexibly arranged according to needs. For example, it can be arranged above the bucket wheel reclaimer or at the position of the inlet of the coal bunker.

[0058] See Figure 2 , the Zhundong coal blending method provided by the embodiment of the present invention can specifically include:

[0059] Step 210: Determine the simulation combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device and the first blending ratio among the Zhundong coal, the raw coal and the blending materials;

[0060] Step 220: If the simulation combustion result meets the preset conditions, control the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device and the feeding amount of the feeding device according to the first blending ratio.

[0061] In a specific embodiment, the coking parameters of the Zhundong coal can specifically include at least one of the following parameters: acid-base ratio, silicon-aluminum ratio, equivalent of sodium oxide and potassium oxide, content of ferric oxide, content of calcium oxide.

[0062] In a specific embodiment, the simulation combustion result involved in the present invention can specifically include: furnace temperature, furnace outlet temperature, high-pressure superheater temperature.

[0063] In a specific embodiment, the first blending ratio involved in the present invention can specifically be: the ratio of Zhundong coal to raw coal is 7:1, and the ratio of Zhundong coal to blending materials is 6:1.

[0064] In a specific embodiment, when the simulation combustion result meets the preset conditions, the process of controlling the coal feeding amount of the Zhundong coal coal feeding device, the coal feeding amount of the raw coal coal feeding device, and the feeding amount of the feeding device according to the first co-firing ratio may specifically include:

[0065] If the simulation combustion result is: the furnace temperature is less than 1350 °C, the difference between the furnace outlet temperature and 1100 °C is greater than or equal to -50 °C and less than or equal to 50 °C, and the difference between the high-pressure superheater temperature and 860 °C is greater than or equal to -10 °C and less than or equal to 10 °C, control the coal feeding amount of the Zhundong coal coal feeding device, the coal feeding amount of the raw coal coal feeding device, and the feeding amount of the feeding device according to the first co-firing ratio.

[0066] In a specific embodiment, the Zhundong coal blending method provided by the embodiments of the present invention may further include:

[0067] If the simulation combustion result is: the furnace temperature is greater than 1400 °C, the furnace outlet temperature is greater than 1150 °C, and the high-pressure superheater temperature is greater than 870 °C, increase the proportion of raw coal and / or blending materials in the first co-firing ratio to obtain a second co-firing ratio;

[0068] Determine the simulation combustion result according to the coking parameters of the Zhundong coal coal sample provided by the Zhundong coal coal feeding device and the second co-firing ratio.

[0069] The Zhundong coal blending method provided by the embodiments of the present invention can achieve precise coal blending, avoid boiler coking while ensuring the maximum blending ratio of Zhundong coal, and ensure the economic benefits of the power plant.

[0070] Combined with Figure 3 , the implementation process of a specific embodiment of the Zhundong coal blending method provided by the embodiments of the present invention may include:

[0071] Step 310: Import the coking characteristics of Zhundong coal.

[0072] Import the coking characteristic information of Zhundong coal into the simulation control device.

[0073] The coking characteristics of Zhundong coal are: coal with an acid-base ratio of 0.4 - 0.7 is prone to slagging, coal with a silicon-aluminum ratio greater than 1.18 is prone to slagging, coal with an equivalent of sodium oxide and potassium oxide greater than 6 is prone to slagging, coal with a ferric oxide content greater than 10% is prone to slagging, and coal with calcium oxide greater than 35% is prone to slagging.

[0074] Step 320: Obtain the coking parameters of Zhundong coal.

[0075] The simulation control device obtains the coking parameters of the Zhundong coal coal sample provided by the Zhundong coal coal feeding device.

[0076] The coking parameters of Zhundong coal may specifically include at least one of the following parameters: acid-base ratio, silica-alumina ratio, equivalent of sodium oxide and potassium oxide, content of ferric oxide, and content of calcium oxide.

[0077] Step 330: Determine the simulated combustion result according to the coking parameters of the Zhundong coal sample and the first blending ratio among the Zhundong coal, raw coal, and admixture.

[0078] Combined with historical data, the specific first blending ratio involved in the present invention may be: the ratio of Zhundong coal to raw coal is 7:1, and the ratio of Zhundong coal to admixture is 6:1.

[0079] The simulated combustion result involved in the present invention may specifically include: furnace temperature, furnace outlet temperature, and high-pressure superheater temperature.

[0080] During the process of the simulation control device performing simulation operations to obtain the simulated combustion result, it can further consider the optimal adjustment simulation schemes such as the matching of coal mills, the adjustment of secondary air dampers, and the cooperation of soot blowing.

[0081] Step 340: Determine whether the simulated combustion result meets the preset conditions.

[0082] If the simulated combustion result is: the furnace temperature is greater than 1400 °C, the furnace outlet temperature is greater than 1150 °C, and the high-pressure superheater outlet temperature is greater than 870 °C, it is determined that the simulated combustion result does not meet the preset conditions (high temperature), the coal blending ratio in the current blending ratio is out of balance, and the proportion of Zhundong coal in the current blending ratio is too high. Subsequently, step 350 is executed.

[0083] If the simulated combustion result is: the furnace temperature is less than 1300 °C, the furnace outlet temperature is less than 1050 °C, and the high-pressure superheater outlet temperature is less than 850 °C, it is determined that the simulated combustion result does not meet the preset conditions (low temperature), and the proportion of Zhundong coal in the current blending ratio is too low. Subsequently, step 360 is executed.

[0084] If the simulated combustion result is: the furnace temperature is less than 1350 °C, the difference between the furnace outlet temperature and 1100 °C is greater than or equal to -50 °C and less than or equal to 50 °C, and the difference between the high-pressure superheater temperature and 860 °C is greater than or equal to -10 °C and less than or equal to 10 °C, it is determined that the simulated combustion result meets the preset conditions. Subsequently, step 370 is executed.

[0085] Step 350: Increase the proportion of raw coal and / or admixture in the first blending ratio, and then return to execute step 330.

[0086] In the embodiment of the present invention, the mixing ratio of raw coal and / or admixture is increased by 1% each time.

[0087] Step 360: Reduce the proportion of raw coal and / or admixture in the first blending ratio, and then return to execute step 330.

[0088] In this step, the proportion of raw coal and / or blending materials in the first blending ratio can be reduced by increasing the proportion of Zhundong coal.

[0089] Step 370: Control the coal feeding amount of the Zhundong coal coal feeder, the coal feeding amount of the raw coal coal feeder, and the feeding amount of the feeder according to the first blending ratio.

[0090] The Zhundong coal blending method provided by the embodiment of the present invention can achieve precise coal blending, avoid boiler coking while ensuring the maximum blending ratio of Zhundong coal, and ensure the economic benefits of the power plant.

[0091] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims, and all of them belong to the protection scope of the present invention.

Claims

1. A Zhundong coal blending system, characterized in that, Including: Jundong coal feeding equipment, raw coal feeding equipment, feeding equipment and simulation control equipment; The Jundong coal feeding equipment includes: a first coal feeder and a first coal conveyor belt, and the first coal feeder is arranged above the input end of the first coal conveyor belt; The raw coal feeding equipment includes: a second coal feeder and a second coal conveyor belt, the second coal feeder is arranged above the input end of the second coal conveyor belt, and the output end of the second coal conveyor belt is arranged above the first coal conveyor belt; The feeding equipment includes: a bin for carrying the admixture and a feeding conveyor belt, the input end of the feeding conveyor belt is arranged below the bin, and the output end of the feeding conveyor belt is arranged above the first coal conveyor belt; The simulation control equipment is used to determine the simulation combustion result according to the coking parameters of the Jundong coal sample provided by the Jundong coal feeding equipment and the first blending ratio among the Jundong coal, raw coal and admixture; if the simulation combustion result meets the preset conditions, control the coal feeding amount of the Jundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment and the feeding amount of the feeding equipment according to the first blending ratio; The coking parameters include at least one of the following parameters: acid-base ratio, silicon-aluminum ratio, equivalent of sodium oxide and potassium oxide, iron sesquioxide content, calcium oxide content; The simulation combustion result includes: furnace temperature, furnace outlet temperature, high-pressure superheater temperature; The if the simulation combustion result meets the preset conditions, control the coal feeding amount of the Jundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment and the feeding amount of the feeding equipment according to the first blending ratio includes: If the simulation combustion result is: the furnace temperature is less than 1350 °C, the difference between the furnace outlet temperature and 1100 °C is greater than or equal to -50 °C and less than or equal to 50 °C, and the difference between the high-pressure superheater temperature and 860 °C is greater than or equal to -10 °C and less than or equal to 10 °C, control the coal feeding amount of the Jundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment and the feeding amount of the feeding equipment according to the first blending ratio.

2. The Zhundong coal blending system according to claim 1, wherein A belt scale is arranged in the feeding conveyor belt.

3. The Zhundong coal blending system according to claim 1, wherein The maximum output value of the feeding conveyor belt is 150 t / h.

4. The Zhundong coal blending system according to claim 1, characterized in that The coal conveyor belt or the feeding conveyor belt includes: main and standby belts; Wherein, the coal conveyor belt is the first coal conveyor belt or the second coal conveyor belt.

5. The Zhundong coal blending system according to claim 1, characterized in that The first coal feeder includes: an impeller coal feeder.

6. The Zhundong coal blending system according to claim 1, characterized in that The second coal feeder includes: an impeller coal feeder or a bin.

7. The Zhundong coal blending system according to claim 1, characterized in that, Also including: A bucket wheel reclaimer, and the output end of the first coal conveyor belt is arranged above the bucket wheel reclaimer.

8. A method for blending Zhundong coal, characterized in that, Including: Determine the simulation combustion result according to the coking parameters of the Jundong coal sample provided by the Jundong coal feeding equipment and the first blending ratio among the Jundong coal, raw coal and admixture; If the simulation combustion result meets the preset conditions, control the coal feeding amount of the Jundong coal feeding equipment, the coal feeding amount of the raw coal feeding equipment and the feeding amount of the feeding equipment according to the first blending ratio; The coking parameters include at least one of the following parameters: acid-base ratio, silicon-aluminum ratio, equivalent of sodium oxide and potassium oxide, iron sesquioxide content, calcium oxide content; The simulation combustion result includes: furnace temperature, furnace outlet temperature, high-pressure superheater temperature; If the simulated combustion result meets the preset conditions, controlling the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device, and the feeding amount of the feeding device according to the first blending ratio includes: If the simulated combustion result is: the furnace temperature is less than 1350 °C, the difference between the furnace outlet temperature and 1100 °C is greater than or equal to -50 °C and less than or equal to 50 °C, and the difference between the high-pressure superheater temperature and 860 °C is greater than or equal to -10 °C and less than or equal to 10 °C, control the coal feeding amount of the Zhundong coal feeding device, the coal feeding amount of the raw coal feeding device, and the feeding amount of the feeding device according to the first blending ratio.

9. The method according to claim 8, wherein The first blending ratio is: the ratio of Zhundong coal to raw coal is 7:1, and the ratio of Zhundong coal to the blend is 6:

1.

10. The method according to claim 8, wherein The method further includes: If the simulated combustion result is: the furnace temperature is greater than 1400 °C, the furnace outlet temperature is greater than 1150 °C, and the high-pressure superheater temperature is greater than 870 °C, increase the ratio of raw coal and / or blend in the first blending ratio to obtain a second blending ratio; Determine the simulated combustion result according to the coking parameters of the Zhundong coal sample provided by the Zhundong coal feeding device and the second blending ratio.

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