A high-homogenization-efficiency unloading device and method for raw material storage

Abstract

The invention discloses a high-homogenization-efficiency unloading device and method for a raw material silo, and relates to the field of raw material homogenization and aeration unloading in a cement plant. The invention readjusts the original aeration unloading logic, and proposes a set of control logics to cope with the states of three valves, namely, a pneumatic gate valve, an electric flow valve and a pneumatic ball valve, according to the homogenization principle, and simultaneously links the switching conditions between the valves to achieve more refined operation, and provides an adjustable aeration unit cycle time to adapt to different on-site homogenization silo conditions; and solves the problems of unloading volume fluctuation, Roots blower tripping and poor homogenization effect of the homogenization silo caused by the unreasonable existing aeration unloading system of the raw material silo.

Description

Technical Field

[0001] The invention relates to the field of raw meal homogenization and aeration unloading in cement plants, and in particular to a raw meal silo high homogenization efficiency unloading device.

[0002] The invention also relates to a high homogenization efficiency unloading method for a raw material silo. Background Art

[0003] The existing raw meal homogenization silo aeration unloading system is programmed by PLC, with the order and time of aeration unloading in each zone pre-set for circulation, and the automation of aeration and unloading in the homogenization silo is achieved by controlling the valves. The PLC program controls the unloading of the silo bottom by controlling the switch of the pneumatic gate valve, controls the time and order of aeration of the silo bottom aeration box by controlling the switch of the pneumatic ball valve, and controls the opening of the electric flow valve to control the flow rate of the unloading material. As far as the current control method of the aeration unloading system is concerned, the control of the three valves is rough and single, and the process function of each valve is not fully utilized in combination with the homogenization principle of the homogenization silo. The control method of aeration unloading is relatively rough, which can easily cause the Roots blower to trip, unstable unloading, and poor raw meal homogenization effect.

[0004] According to the raw material homogenization coefficient calculation formula H = N 1 / 2 , H is the homogenization coefficient of the raw meal after mixing; N is the number of mixed raw meal flows, which can be regarded as the number of material layers distributed in the homogenization bin. The more material layers are cut during unloading, the larger the N value is, and the greater the raw meal homogenization coefficient is;

[0005] In actual production, due to different understandings of the homogenization silo, the control strategies for the inflation and unloading at the bottom of the silo vary, but the overall idea is to try to keep multiple unloading areas unloading at the same time, and the unloading time of the unloading areas is different, so that the materials entering the silo at different times can be cut to the greatest extent, thereby improving the homogenization efficiency; because the inflation and unloading order and unloading time of the unloading area at the bottom of the silo are not the same, there are the following problems:

[0006] 1. The unloading time of each zone is different, so there must be a certain unloading zone with a longer unloading time than other unloading zones. After multiple unloading cycles, a larger funnel depression is bound to be formed in this unloading area. The funnel-shaped depression of each unloading zone tends to be stable, and the depression formed in the unloading zone with the longest unloading time is the largest. During aeration unloading, the material layers that can be cut tangentially are getting fewer and fewer, and the number of material layers cut radially is relatively fixed. According to the calculation formula of the raw material homogenization coefficient, the N value is getting smaller and smaller, and the homogenization coefficient will decrease. In another case, when the material level in the warehouse drops after multiple unloading cycles, the raw material is replenished in time, but a larger depression has been formed in the warehouse in the previous multiple unloading cycles. The replenished raw material is evenly spread on the surface of the depression. During unloading, the material layer cut tangentially is replenished, but the material layer cut radially is the material layer that is flattened at the same time, that is, the radial material is the raw material of the same material layer, which greatly reduces the radial cutting effect and is not conducive to improving the homogenization coefficient.

[0007] 2. When the inflation area at the bottom of the warehouse is inflated and circulated, the inflation pipe valve is constantly switched in the inflation area, but the Roots blower for inflation is always kept open. According to the constant volume characteristics of the Roots blower, if the same number of inflation areas cannot be maintained at the same time when switching the inflation areas, it is easy to cause the Roots blower to be blocked at the air outlet and the current to fluctuate frequently. In severe cases, it may even exceed the rated current and then trip. Due to the fluctuations in the air supply pressure and air volume of the blower, the amount of material discharged from the warehouse fluctuates, and the raw material homogenization cannot achieve the expected homogenization effect.

[0008] 3. Since the raw material is fluidized in the mixing bin, the amount of material leaving the bin is proportional to the material level in the bin. The fluctuation of the amount of raw material entering the homogenization mixing bin will be transmitted step by step to the metering equipment at the outlet of the mixing bin. The opening of the flow regulating valve out of the mixing bin is frequently adjusted according to the feedback from the metering equipment, resulting in an increase in the fluctuation of the amount of material leaving the bin and entering the downstream firing system.

[0009] 4. The existing links such as top feeding, bottom aeration unloading, mixing bin metering and transportation are not effectively combined and are controlled separately. The impact of unloading fluctuations is also superimposed, which ultimately leads to poor raw material homogenization effect, low homogenization coefficient and large fluctuations in raw material discharge capacity.

[0010] After the above four factors are superimposed, the advantages of the system are not brought into play, resulting in the final raw material homogenization effect not meeting expectations. The chemical composition, particle size and passability of the raw materials entering the subsequent firing system fluctuate greatly, ultimately resulting in large fluctuations in the system thermal performance, large fluctuations in product quality, and high unit energy consumption. Summary of the invention

[0011] The purpose of the present invention is: In view of the above-mentioned problems, the purpose of the present invention is to provide a raw material silo with high homogenization efficiency unloading device and method. According to the homogenization principle of the raw material silo and the role of the valve in the silo bottom aeration unloading, the inflation unloading logic of the inflation unloading system is readjusted. Without adding equipment, the problems of discharge volume fluctuation, Roots blower tripping and poor homogenization effect of the homogenization silo caused by the unreasonable existing inflation unloading system of the raw material silo are solved.

[0012] The technical solution adopted by the present invention is as follows:

[0013] A high homogenization efficiency unloading device for a raw material warehouse, the unloading device comprising:

[0014] Raw material warehouse;

[0015] A multi-point unloading device on the top of the silo, the top of the raw material silo is connected to the multi-point unloading device on the top of the silo;

[0016] A material unloading area, wherein the material unloading area is located at the bottom of the raw material storage, an aeration area is provided in the material unloading area, an aeration box is installed in the aeration area, and a pressure reducing cone is provided in the center of the material unloading area;

[0017] A discharge port, the discharge port is arranged directly below the pressure reducing cone, the end of the discharge port away from the pressure reducing cone is connected to a discharge chute, and a pneumatic gate valve and an electric flow valve are built-in at the end of the discharge chute close to the discharge port; a homogenizing metering bin is arranged at the end of the discharge chute away from the discharge port, a solid flow meter is arranged at the outlet of the homogenizing metering bin, and a storage chute is arranged at the outlet of the homogenizing metering bin;

[0018] A Roots blower is connected to an air charging box in each air charging area, and a pneumatic ball valve is arranged between the air charging box and the Roots blower.

[0019] Furthermore, the material discharge area is composed of a plurality of regular hexagons, and the regular hexagonal material discharge area is divided into six triangular areas, namely the inflation areas, and the decompression cone is located at the center of the regular hexagonal material discharge area.

[0020] Furthermore, the unloading area includes 7 regular hexagons, one of which is located at the center, and the remaining 6 are respectively arranged around the central regular hexagon, with a total of 42 inflation areas.

[0021] Furthermore, a pneumatic gate valve is arranged at the inlet end of the discharge chute, and the electric flow valve is arranged behind the pneumatic gate valve.

[0022] A method for discharging raw material from a raw material warehouse with high homogenization efficiency, using a device for discharging raw material from a raw material warehouse with high homogenization efficiency, the method comprising:

[0023] The opening and closing of the pneumatic gate valve and the electric flow valve are synchronized;

[0024] The weight of the homogenizing metering bin is linked to the opening of the electric flow valve. When the weight of the homogenizing metering bin decreases, the opening of the electric flow valve increases, and vice versa.

[0025] When unloading, that is, when the pneumatic gate valve and the electric flow valve are opened, keep the pneumatic ball valve in the inflation area from being completely closed.

[0026] Furthermore, during the unloading process, the three pneumatic ball valves are kept open, and the three pneumatic ball valves respectively correspond to an inflation zone in a different unloading zone, that is, an inflation small cycle, and each inflation zone is cyclically inflated using the inflation small cycle as the inflation method.

[0027] Furthermore, each small inflation cycle corresponds to a unit cycle time, and the entire inflation and unloading cycle is adjusted by adjusting the unit cycle time.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The method of the present invention stabilizes the discharge flow, reduces the fluctuation of the metering bin, stabilizes the discharge of raw materials, and helps to stabilize the production of the subsequent thermal system. Specifically:

[0030] The weight of the mixing bin is associated with the opening of the electric flow valve. The switch of the electric flow valve remains consistent with the switch of the pneumatic gate valve for unloading. However, by adjusting the opening of the electric flow valve, the raw material flow at the unloading outlet is controlled in real time to maintain the weight of the homogenizing metering bin within a certain range and keep the outgoing material quantity relatively stable.

[0031] 2. The method of the present invention maintains stable inflation pressure, enhances the raw material homogenization effect, and ensures stable operation of the Roots blower, specifically:

[0032] The inflation logic of the present invention will always keep inflating the three triangles in different unloading areas. When the unloading logic maintains unloading in three triangles, the inflation logic will inflate the three triangles, and the unloading and inflation are synchronized to ensure smooth unloading; when the unloading logic maintains unloading in two or no triangles, the inflation logic will inflate the other triangles in addition to the unloading triangle. At this time, the unloading and inflation are not synchronized, and while ensuring smooth unloading in the unloading triangle, the raw materials at the bottom of the other triangles can also be activated. This not only ensures smooth unloading, increases the homogenization effect of the homogenization silo, but also keeps the inflation pressure stable, which is conducive to the stable operation of the Roots blower and solves the problem of the Roots blower tripping.

[0033] 3. The method of the present invention adjusts the aeration cycle time according to actual conditions, enhances the homogenization effect of the homogenization tank, and improves the homogenization coefficient of the raw material entering the kiln, specifically:

[0034] The aeration unloading logic provided by the present invention enables the raw material to form a funnel flow in the homogenization bin, ensuring that as many material layers as possible are cut tangentially during the unloading of the raw material, and at the same time controlling the depression of the raw material funnel within a certain range, so as not to reduce the number of material layers cut radially, thereby improving the homogenization coefficient of the raw material, reducing the fluctuation of the raw material composition, and enhancing the homogenization effect of the raw material bin, which is very important for stable production;

[0035] At the same time, the inflation cycle time can be changed, which can be increased or decreased in units of one second. This will enable on-site commissioning personnel to make adjustments based on the actual storage capacity of the homogenization silo, making it more adaptable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of a high-homogenization-efficiency unloading device for a raw material silo of the present invention;

[0037] Figure 2 It is a schematic diagram of the large cycle of inflation and unloading in Example 1 of the present invention;

[0038] Figure 3 It is a schematic diagram of the small cycle of inflation and unloading in Example 1 of the present invention.

[0039] Markings in the figure: 1. Multi-point unloading device on the top of the warehouse, 2. Raw material warehouse, 3. Pressure reducing cone, 4. Inflatable box, 5. Partition at the bottom of the warehouse, 6. Pneumatic gate valve, 7. Electric flow valve, 8. Unloading chute, 9. Mixing bin, 10. Solid flow meter, 11. Outbound chute, 12. Roots blower, 13. Pneumatic ball valve. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The present invention readjusts the original inflation and unloading logic, and proposes a set of control logic to deal with the status of three valves according to the homogenization principle, while linking the switching conditions between the valves to achieve more refined operation, and provides an adjustable inflation unit cycle time to adapt to different on-site homogenization storage conditions.

[0043] For the unloading logic controlled by the pneumatic gate valve, we strive to determine the different unloading amounts in different unloading areas at different unloading times, so that the raw materials in the warehouse produce a "funnel effect" under the action of gravity and form a funnel flow, so that the raw materials can produce radial mixing and homogenization while producing gravity tangential homogenization. The gravity homogenization effect is improved as much as possible, so that the downstream materials can cut all the material layers that have been laid in the warehouse. At the same time, the raw materials in the warehouse are controlled not to form too large funnel depressions under the funnel effect, reducing the homogenization coefficient.

[0044] For the discharge volume controlled by the electric flow valve, the logic of opening and closing is consistent with that of the pneumatic gate valve. However, the electric flow valve has more than just an open and closed state. Its opening can also be controlled by PLC programming. The valve opening is related to the weight of the mixed bin in the center of the bottom of the silo. When the value of the bin weight sensor of the mixed bin is lower than the set lower limit, the opening of the electric flow valve increases. When the value of the bin weight sensor of the mixed bin is higher than the set upper limit, the opening of the electric flow valve decreases. The control logic principle of the electric flow valve is to keep the bin weight of the mixed bin stable so that the solid flow meter can accurately measure and stabilize the discharge volume.

[0045] Since the control logic of unloading is designed to increase the homogenization effect, it requires different unloading amounts in different areas and inconsistent unloading flow rates. However, the control logic of the electric flow valve is consistent with the pneumatic gate valve of unloading, which only plays the role of switching and does not control the unloading flow rate, resulting in large fluctuations in the amount of raw materials discharged from the warehouse, and the amount of raw materials in the mixing bin fluctuates accordingly, which in turn affects the stable feeding of raw materials. The improved unloading system adds a precise control part of the electric flow valve, which associates the weight of the mixing bin with the opening of the seven electric flow valves; the switch of the electric flow valve is still consistent with the switch of the pneumatic gate valve of unloading, but by adjusting the opening of the electric flow valve, the raw material flow rate of the unloading outlet is controlled in real time, the weight of the homogenization metering bin is maintained within a certain range, and the amount of unloading materials is kept relatively stable.

[0046] For the inflation logic controlled by the pneumatic ball valve, while ensuring that the discharge area is inflated, it is also necessary to ensure that one of the triangular chute areas of the three different discharge areas is inflated at the same time.

[0047] Based on the switch principle of the above three valves, the small unit cycle aeration unloading logic is designed as follows: Figure 3 However, in order to ensure that there is no large funnel depression in the long-term operation of the aerated unloading cycle, it is selected as follows Figure 3 The small unit inflation and unloading logic shown in the figure is extended to 7 times, so that the unloading area with a longer inflation time can circulate in sequence in the seven unloading areas, forming a Figure 2As shown in the larger unit inflation cycle, within this inflation cycle, each inflation unloading area experiences the long inflation unloading and short inflation unloading of the small unit cycle, but the inflation unloading time of each inflation unloading area within the larger unit cycle is consistent. In this way, after a long period of operation, the material layer remains basically consistent and no large depressions will occur. Figure 3 Each circle is a schematic diagram of the distribution of the unloading area at the bottom of the silo. The shaded triangle area indicates that this triangle area is in the unloading state, and the corresponding pneumatic gate valve under the unloading port is open, and the other pneumatic gate valves are closed. From left to right and from top to bottom, the figure shows the unloading sequence of each unit unloading time. The unit unloading time is controllable and adjustable. Each unloading small cycle has a total of 144 unit unloading time, and the unloading large cycle is 7×144 unit unloading time. The unloading switch cycles together with the inflation unit.

[0048] The pneumatic unloading method provided by the present invention can not only keep the outlet pressure of the Roots blower relatively stable, which is beneficial to the smooth operation of the Roots blower, but also ensure the stability of the material layer in the homogenization bin, without affecting the material layer cutting of the material, and ensure the tangential and radial material taking effects of the raw material.

[0049] For the cycle time of aeration unloading, a modifiable unit cycle time is provided. It is no longer fixed and can be increased or decreased in units of one second. This will allow on-site commissioning personnel to make adjustments based on the actual storage capacity of the homogenization silo, enhance the homogenization effect of the raw material silo, and improve the homogenization coefficient of the raw material entering the kiln.

[0050] Example 1

[0051] like Figure 1 As shown, the ground raw material powder enters the raw material warehouse 2 through the multi-point unloading device 1 on the top of the warehouse. The multi-point unloading device 1 makes the raw material entering the warehouse basically horizontally dispersed in the warehouse, and the raw material is spread layer by layer; the bottom of the raw material warehouse 2 is divided into seven unloading areas A to G according to the warehouse bottom partition 5, and each unloading area is divided into six triangular area inflation areas 1 to 6 in sequence. The pressure reducing cone 3 is installed in the center of the seven unloading areas, and the inflation box 4 is installed in the triangular inflation area; the raw material at the bottom of the warehouse is activated under the control of the unloading inflation logic, and flows to the discharge port just below the pressure reducing cone 3, and the lower part of the discharge port is connected to the unloading chute 8. The pneumatic gate valve 6 and the electric flow valve 7 installed at the front end of the unloading chute 8 control the stabilized raw material flow to enter the mixing bin 9 for further mixing and homogenization. A solid flow meter 10 is set at the outlet of the mixing bin 9 to measure the discharge amount of the raw material after uniform mixing. Finally, the raw material is transported to the next production process by the unloading chute 11.

[0052] Except for the multi-point unloading device 1 on the top of the warehouse and the outgoing chute 11, the inflation air for the entire system is provided by the Roots blower 12, and the air for each part is transported by pipes of various diameters. A pneumatic ball valve 13 is uniformly installed on each inflation pipe below the inflation box 4 at the bottom of the warehouse, that is, a pneumatic ball valve is arranged between the Roots blower and the inflation box 4, and the inflation system adjusts the inflation sequence and inflation time of the 42 triangular areas by controlling the switch of the pneumatic ball valve 13.

[0053] The unloading and aeration of the entire raw material warehouse are controlled by three valves: pneumatic gate valve 6, electric flow valve 7 and pneumatic ball valve 13. The valve switch and the order of aeration and unloading are realized by PLC programming, which can be highly automated. The pneumatic gate valve 6 and the electric flow valve 7 are opened and closed synchronously, wherein the opening of the electric flow valve 7 is associated with the weight of the mixing bin 9. When the weight of the homogenizing metering bin, i.e. the mixing bin 9, decreases, the opening of the electric flow valve 7 increases, and when the weight of the homogenizing metering bin increases, the opening of the electric flow valve 7 decreases. The purpose of the electric flow valve 7 is to control the weight of the homogenizing metering bin within a relatively stable range so that the solid flow meter 10 can accurately measure and stabilize the feeding amount. When all three valves are in the open state, the raw materials in the triangle area at the bottom of the warehouse are in an activated state due to the inflation, and can flow smoothly to the homogenizing metering bin, i.e. the mixing bin 9, after the flow is controlled by the pneumatic gate valve 6 and the electric flow valve 7. When the pneumatic gate valve 6 and the electric flow valve 7 are closed synchronously and the pneumatic ball valve 13 is opened, the triangular area at the bottom of the reservoir stops unloading, and the raw materials at the bottom of the corresponding triangular area continue to diffuse and homogenize under the action of inflation, making the mixing more thorough and enhancing the homogenization effect of the homogenization reservoir. There is no state of unloading but no inflation in the inflation unloading system, that is, there is no state where the pneumatic gate valve 6 and the electric flow valve 7 are opened synchronously but the corresponding pneumatic ball valve 13 is closed. The inflation logic always keeps the three pneumatic ball valves 13 opened, and inflates the three triangular areas. This can stabilize the outlet pressure of the Roots blower, maintain the smooth operation of the Roots blower, and avoid its tripping and stopping. The specific switching sequence of the pneumatic gate valve 6, the electric flow valve 7 and the pneumatic ball valve 13 and the inflation unloading time are determined by Figure 3 As shown, Figure 3 The figure shows a small aeration cycle. In order to ensure the homogenization coefficient of the raw material in the silo and avoid a large funnel-shaped depression, the small cycle shown in the figure is cycled once in each aeration area to obtain a complete aeration cycle. Each small aeration and unloading cycle has a total of 144 unit cycle times, and the complete aeration cycle is 144×7 unit cycle times. Each schematic diagram of the silo bottom represents the aeration and unloading status of the triangle area per unit cycle time, and the shaded triangle area indicates that the corresponding valve in the corresponding triangle area is open.

[0054] The unit cycle unloading time can be adjusted according to the storage volume in the raw material silo to enhance the homogenization effect of the raw material silo.

[0055] Example 2

[0056] In this embodiment, the central area A is independent, and the other 6 areas participate in the large cycle described in Example 1. During the participation of the 6 areas in the cycle, it is impossible to ensure that one of the triangular chute areas of the three different unloading areas is inflated at the same time, and it will appear that one of the unloading areas does not participate in the inflation process. At this moment, the inflation balance cannot be guaranteed. At this time, the central area A participates in the inflation, that is, the central area A is independent and when the 6 areas participate in the cycle, when a certain area does not participate in the inflation, the A area performs compensatory inflation, that is, at this moment, the pneumatic ball valve in a triangular area of ​​the A area is opened, which ensures the inflation balance while ensuring the stability of the unloading. At the same time, the unloading process of the independent A area is adjusted according to the actual situation, that is, the opening of the inflation gate valve and the electric flow valve in the triangular area is adjusted according to the specific situation, which also ensures the homogenization coefficient of the raw material in the warehouse, and no large funnel-shaped depression will occur.

[0057] In this paper, the formula of homogenization coefficient is derived as follows:

[0058] Suppose two material flows are mixed. For the convenience of discussion and analysis, it is assumed that the amount of material flowing through the two material flows per unit time is equal. The composition of each material flow changes with time. If the two material flows are sampled at the same time, then after a certain period of time, N samples will be obtained for each material flow. Analyze the value of a component to be homogenized in these samples. The component value is set as C here. In this way, there are N sample values ​​for each material flow, and 2N sample values ​​for two material flows. According to the time series, they are arranged as follows:

[0059] First material flow: C 11 , C 12 , C 13 , C 14 , ..., C 1N

[0060] Its average value is:

[0061] Second material flow: C 21 , C 22 , C 23 , C 24 , ..., C 2N

[0062] Its average value is:

[0063] According to the above formula, the average value of the mixed material flow is:

[0064]

[0065] The standard deviation of the two material streams before mixing is:

[0066] S1={1 / 2N∑[(C 1i -C) 2 +(C 2i -C) 2 ]} 1 / 2 (2)

[0067] When the two material streams are mixed, the standard deviation is:

[0068]

[0069] Where:

[0070]

[0071] A1, A2, A3...A N Substitute it into the S2 calculation formula to get:

[0072] S2={1 / 4N∑[(C 1i -C) 2 +2(C 1i -C)(C 2i -C)+(C 2i -C) 2 ]} 1 / 2 (5)

[0073] The mass distribution of material flow can mostly be regarded as a normal distribution.

[0074] ∑2(C 1i -C)(C 2i -C)=0(6)

[0075] Therefore, the standard deviation of the mixed material flow can be:

[0076] S2={1 / 4N∑[(C 1i -C) 2 +(C 2i -C) 2 ]} 1 / 2 (7)

[0077] The homogenization coefficient of the mixed material flow is:

[0078]

[0079] When there are N material flows mixed, using the polynomial theorem, it can be proved that the homogenization coefficient is:

[0080] H=N 1 / 2 (9).

[0081] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0082] In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "inside", etc. is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship where the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0083] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A high homogenization efficiency unloading device for raw material storage, characterized in that: The unloading device comprises: Raw material warehouse; A multi-point unloading device on the top of the silo, the top of the raw material silo is connected to the multi-point unloading device on the top of the silo; A material unloading area, wherein the material unloading area is located at the bottom of the raw material storage, an aeration area is provided in the material unloading area, an aeration box is installed in the aeration area, and a pressure reducing cone is provided in the center of the material unloading area; A discharge port, the discharge port is arranged directly below the pressure reducing cone, the end of the discharge port away from the pressure reducing cone is connected to a discharge chute, and a pneumatic gate valve and an electric flow valve are built-in at the end of the discharge chute close to the discharge port; a homogenizing metering bin is arranged at the end of the discharge chute away from the discharge port, a solid flow meter is arranged at the outlet of the homogenizing metering bin, and a storage chute is arranged at the outlet of the homogenizing metering bin; A Roots blower is connected to an air charging box in each air charging area, and a pneumatic ball valve is arranged between the air charging box and the Roots blower.

2. A raw material storage high homogenization efficiency unloading device according to claim 1, characterized in that: The blanking area is composed of a plurality of regular hexagons, and the regular hexagonal blanking area is divided into six triangular areas, namely, the inflation areas, and the decompression cone is located at the center of the regular hexagonal blanking area.

3. A high homogenization efficiency unloading device for raw material storage according to claim 1, characterized in that: The unloading area includes 7 regular hexagons, one of which is located at the center, and the remaining 6 are arranged around the central regular hexagon, with a total of 42 inflation areas.

4. A high homogenization efficiency unloading device for raw material storage according to claim 1, characterized in that: A pneumatic gate valve is arranged at the inlet end of the discharging chute, and an electric flow valve is arranged behind the pneumatic gate valve.

5. A method for unloading a raw material warehouse with high homogenization efficiency, using a raw material warehouse with high homogenization efficiency unloading device according to any one of claims 1 to 4, characterized in that: The method comprises: The opening and closing of the pneumatic gate valve and the electric flow valve are synchronized; The weight of the homogenizing metering bin is linked to the opening of the electric flow valve. When the weight of the homogenizing metering bin decreases, the opening of the electric flow valve increases, and vice versa. When unloading, that is, when the pneumatic gate valve and the electric flow valve are opened, keep the pneumatic ball valve in the inflation area from being completely closed.

6. A method for discharging raw materials from a raw material warehouse with high homogenization efficiency according to claim 5, characterized in that: During the unloading process, the three pneumatic ball valves are kept open, and the three pneumatic ball valves correspond to an inflation zone in different unloading areas respectively, that is, a small inflation cycle. Each inflation zone is cyclically inflated using the small inflation cycle as the inflation method.

7. A method for discharging raw materials from a raw material warehouse with high homogenization efficiency according to claim 6, characterized in that: Each small inflation cycle corresponds to a unit cycle time, and the entire inflation and unloading cycle is adjusted by adjusting the unit cycle time.

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