Coal mill transfer system and coal mill

Abstract

The invention relates to a coal mill transfer system and a coal mill.The coal mill transfer system comprises a plurality of transfer boxes, a connecting pipe set and a boiler slag well, the transfer boxes are used for loading coal gangue, the connecting pipe set comprises a connecting main pipe and a plurality of connecting branch pipes, the first end of each connecting branch pipe is connected with one transfer box in a sealed mode, and the second end of each connecting branch pipe is connected with the boiler slag well in a sealed mode; negative pressure exists in the boiler slag well, one end of the connecting main pipe is closed, the other end of the connecting main pipe communicates with the boiler slag well, and the boiler slag well is used for extracting dust impurities in the transfer box. According to the coal mill transfer system, dust and impurities in the transfer box can be adsorbed through negative pressure naturally formed in the boiler slag well, the adsorbed dust and other impurities can be directly treated in the boiler slag well without causing environmental pollution, and the whole transfer system does not need to be independently provided with a negative pressure source; and under the condition that the cleaning effect of impurities such as dust in the transfer box is guaranteed, the cost is low.

Description

Technical Field

[0001] This disclosure relates to the field of coal mill technology, and more specifically, to a coal mill transfer system and a coal mill using the coal mill transfer system. Background Technology

[0002] As a container for temporarily storing coal gangue in a coal mill, the transfer box is equipped with a sealing strip at the slag discharge door to prevent the leakage of dust and odors. However, after a period of use, the sealing strip will age, leading to the leakage of dust and odors. In related technologies, the aging problem of the sealing strip is usually addressed by replacing it after a period of downtime or by installing a small exhaust hood around the slag discharge door of the transfer box. The former requires downtime for replacement, which is costly, while the latter requires additional fans and filtration equipment, which consumes more energy and has a limited exhaust range, making it difficult to cover all the sealing gaps of the transfer box. Summary of the Invention

[0003] The purpose of this disclosure is to provide a coal mill transfer system that can utilize the boiler slag well in the system to remove dust and other impurities from the transfer box, with high efficiency and low cost.

[0004] To achieve the above objectives, this disclosure provides a coal mill transfer system, comprising: Transfer boxes, of which multiple boxes are provided, are used to load coal gangue that cannot be ground; A connecting pipe assembly, comprising a main connecting pipe and multiple branch connecting pipes, wherein the first end of each branch connecting pipe is sealed to one of the transfer boxes, and the second end of each branch connecting pipe is connected to the main connecting pipe; The boiler slag well has a negative pressure inside. One end of the connecting main pipe is closed, and the other end is connected to the boiler slag well. The boiler slag well is used to extract dust and impurities from the transfer box.

[0005] Optionally, the transfer box is provided with a connection hole, which is used to mate with the first end of the connecting pipe to seal the first end of the connecting pipe to the transfer box.

[0006] Optionally, the connection hole is located at the top of the side wall of the transfer box in the vertical direction, and the diameter of the connection hole is 50-80mm.

[0007] Optionally, it also includes a control valve assembly for controlling the opening and closing of the main connecting pipe and multiple connecting branch pipes.

[0008] Optionally, the control valve group includes a main pipe valve and multiple branch pipe valves, each of the branch pipe valves being connected within a length of 1-1.5m from the transfer box of the connecting branch pipe, and the main pipe valve being located at the end of the connecting main pipe near the boiler slag well.

[0009] Optionally, it also includes a detection and control component, which includes a detection element and a control element. The detection element is used to detect the negative pressure in the boiler slag well and the dust concentration in the transfer box. The control element is used to control the opening degree of the control valve assembly based on the detection data of the detection element.

[0010] Optionally, it also includes an alarm component capable of receiving negative pressure in the boiler slag well detected by the detector and issuing an alarm based on the negative pressure value.

[0011] Optionally, the boiler slag well is provided with an adjusting element, which is used to adjust the negative pressure in the boiler slag well.

[0012] Optionally, the outer walls of the connecting branch pipe and the connecting main pipe are provided with an anti-corrosion layer.

[0013] A second aspect of this disclosure also provides a coal mill, including the coal mill transfer system described in the above embodiments.

[0014] The advantages of this disclosure through the above technical solution are as follows: The coal mill transfer system of this disclosure connects multiple transfer boxes to the boiler slag well through connecting main pipes and connecting branch pipes via connecting pipe groups. This allows the dust and impurities in the transfer boxes to be adsorbed by the negative pressure naturally formed inside the boiler slag well. The adsorbed dust and other impurities can be directly treated in the boiler slag well without causing environmental pollution. The entire transfer system does not require a separate negative pressure source, but utilizes the negative pressure generated by the boiler slag well in the dry slag machine section of the system. While ensuring the cleaning effect of dust and other impurities in the transfer boxes, it also has a low cost.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the coal mill transfer system provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of a coal mill transfer system provided in an exemplary embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures 1-Transfer box; 11-Connection hole; 2-Connecting pipe assembly; 21-Connecting main pipe; 22-Connecting branch pipe; 3-Boiler slag well; 31-Regulating component; 4-Control valve assembly; 41-Main pipe valve; 42-Branch pipe valve; 5-Detection and control component; 51-Detection component; 52-Control component; 6-Alarm component. Detailed Implementation

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "higher," "lower," "top," and "bottom" generally refer to the orientation of the corresponding component or structure in the direction of gravity. "Inner" and "outer" refer to the inner and outer contours of the corresponding component. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0020] This disclosure relates to a coal mill transfer system that can effectively remove dust and impurities from the coal mill transfer box, preventing dust leakage from the transfer box and causing environmental pollution. See [link to relevant documentation]. Figure 1 and Figure 2 The coal mill transfer system disclosed herein includes a transfer box 1, a connecting pipe assembly 2, and a boiler slag well 3. Multiple transfer boxes 1 are provided to store coal gangue that the coal mill cannot grind. The connecting pipe assembly 2 includes a connecting main pipe 21 and multiple connecting branch pipes 22, each corresponding to one transfer box 1. During connection, the first end of the connecting branch pipe 22 is connected to the transfer box 1, and the second end is connected to the connecting main pipe 21. The boiler slag well 3 is a component of the dry slag machine system. The boiler slag well 3 has a natural negative pressure inside. One end of the connecting main pipe 21 is closed, and the other end is connected to the boiler slag well 3. The negative pressure in the boiler slag well 3 allows for the adsorption of dust and other impurities from the transfer box 1 via the connecting branch pipes 22. After adsorption, the impurities entering the boiler slag well 3 are directly incinerated in the boiler slag well 3 and then discharged without causing environmental pollution.

[0021] The coal mill transfer system disclosed herein connects multiple transfer boxes 1 to the boiler slag well 3 via a connecting pipe group 2, a connecting main pipe 21, and a connecting branch pipe 22. This allows the negative pressure naturally generated inside the boiler slag well 3 to adsorb dust and impurities in the transfer boxes 1. The adsorbed dust and other impurities can be directly treated in the boiler slag well 3 without causing environmental pollution. The entire transfer system does not require a separate negative pressure source; instead, it utilizes the negative pressure generated by the boiler slag well 3 in the dry slag machine section of the system. This ensures the cleaning effect of dust and other impurities in the transfer boxes 1 while also having a low cost.

[0022] In some embodiments of this disclosure, an anti-corrosion layer is provided on the outer wall of the connecting main pipe 21 and the connecting branch pipe 22. The material of the anti-corrosion layer can be coal tar enamel, petroleum asphalt, polyethylene adhesive tape, epoxy resin, polyolefin coating, etc., which can be determined according to the actual situation. By providing an anti-corrosion layer on the outer wall of the connecting main pipe 21 and the connecting branch pipe 22, damage to the connecting main pipe 21 and the connecting branch pipe 22 located in the factory can be avoided due to the influence of the external environment, which would cause the leakage of dust and impurities in the connecting main pipe 21 and the connecting branch pipe 22, thereby causing environmental pollution.

[0023] In some embodiments of this disclosure, see Figure 1 and Figure 2 A connection hole 11 is provided on the transfer box 1, which can mate with the first end of the connecting pipe 22 to complete the fixed connection between the first end of the connecting pipe 22 and the transfer box 1. Specifically, the connection structure between the connection hole 11 and the first end of the connecting pipe 22 can be that the connection hole 11 is a threaded hole, and the first end of the connecting pipe 22 is threaded. During connection, the first end of the connecting pipe 22 is directly inserted into the connection hole 11 and rotated to complete the fixed connection between the first end of the connecting pipe 22 and the transfer box 1. In some other embodiments, a high-temperature resistant sealant can also be provided at the connection between the first end of the connecting pipe 22 and the connection hole 11 to ensure the airtightness of the connection between the connecting pipe 22 and the transfer box 1, and to prevent dust and other impurities in the transfer box 1 from flowing out through the gap between the connecting pipe 22 and the transfer box 1, causing environmental pollution.

[0024] In some embodiments of this disclosure, see Figure 1 and Figure 2The connection hole 11 is located at the top of the side wall of the transfer box 1 in the vertical direction. This arrangement facilitates the connection between the connection hole 11 and the connecting branch pipe 22, as well as the connection between the connecting branch pipe 22 and the connecting main pipe 21. If the connection hole 11 were located on the top surface of the transfer box 1, it would be difficult to connect it to the connecting branch pipe 22, and the connecting branch pipe 22 would be difficult to connect to the connecting main pipe 21 if it were located at a higher position. Furthermore, the fact that it is located at the top of the side wall in the vertical direction also prevents granular coal in the transfer box 1 from entering the connecting branch pipe 22.

[0025] In some embodiments of this disclosure, the diameter of the connecting hole 11 can be 50-80mm. This setting avoids the situation where dust and other impurities in the transfer box 1 cannot quickly enter the connecting branch pipe 22 due to the connecting hole 11 being too small, thus affecting the ash removal efficiency. It also avoids the situation where granular coal in the transfer box 1 enters the connecting branch pipe 22 due to the connecting hole 11 being too large, thus affecting the normal operation of the coal mill transfer system. Of course, in other embodiments, the diameter of the connecting hole 11 can also be other, depending on the actual situation, and this disclosure does not impose any limitations on this. In some embodiments of this disclosure, see Figure 1 and Figure 2 The coal mill transfer system disclosed herein also includes a control valve group 4. By setting the control valve group 4, the opening and closing of the connecting main pipe 21 and connecting branch pipes 22 can be controlled, as well as the opening and closing of different connecting branch pipes 22 individually. For example, when some transfer boxes 1 are in use and others are not in use, or when maintenance is required, the control valve group 4 can control the opening of the connecting branch pipes 22 of the used transfer boxes 1, and control the closing of the connecting branch pipes 22 of the unused or maintenance-required transfer boxes 1, to avoid wasting negative pressure in the boiler slag well 3. Conversely, when the entire coal mill is not in use, or when there is little coal gangue in the transfer boxes 1 and dust removal is not required, the connecting main pipe 21 can be closed to prevent negative pressure in the boiler slag well 3 from affecting the normal use of the transfer boxes 1.

[0026] In some embodiments of this disclosure, see Figure 1 and Figure 2The control valve assembly 4 includes a main pipe valve 41 and multiple branch pipe valves 42. The main pipe valve 41 and branch pipe valves 42 can be common solenoid valves or other valve bodies known to those skilled in the art. The main pipe valve 41 is positioned near the end of the connecting main pipe 21 that connects to the boiler slag well 3 to ensure the stability of the negative pressure transmitted from the boiler slag well 3 to the connecting main pipe 21. Each branch pipe valve 42 is connected to the connecting branch pipe 22 within a length of 1-1.5m from the transfer box 1 to prevent leakage caused by loosening of the interface between the connecting branch pipe 22 and the branch pipe valve 42 due to vibration. Wear-resistant asbestos gaskets can also be provided at the connections between the main pipe valve 41 and the branch pipe valve 42 and the connecting main pipe 21 and the connecting branch pipe 22 to further ensure the stability and airtightness of the connection between the main pipe valve 41 and the branch pipe valve 42 and the connecting main pipe 21 and the connecting branch pipe 22. Of course, in other embodiments, the control valve assembly 4 may also include other components, depending on the actual situation; this disclosure does not impose any limitations on this.

[0027] In some embodiments of this disclosure, see Figure 1 and Figure 2 The coal mill transfer system disclosed herein also includes a detection and control component 5, which comprises a detection element 51 and a control element 52. The detection element 51 can detect the negative pressure in the boiler slag well 3 and the dust concentration in the transfer box 1. The type of detection element 51 can be a conventional sensor such as a negative pressure sensor or a dust concentration sensor, which can be determined according to the actual situation and will not be described in detail here. The control element 52 can control the opening degree of the control valve group 4 based on the detection data of the detection element 51.

[0028] For example, when the detection element 51 detects a strong negative pressure in the boiler slag well 3, the control element 52 can control the control valve group 4 to a smaller opening, reducing the intensity of the negative pressure transmitted to the transfer box 1, ensuring that the negative pressure can only absorb dust and other impurities in the transfer box 1. When the intensity of the negative pressure returns to normal, the control element 52 can control the control valve group 4 to return to its original opening. When the detection element 51 detects a high dust concentration in the transfer box 1, the control element 52 can control the control valve group 4 to a larger opening, increasing the amount of dust entering the connecting pipe 22, thereby increasing the dust removal efficiency of the negative pressure in the boiler slag well 3. When the dust concentration decreases, the control element 52 can control the control valve group 4 to return to its original opening. Of course, in other embodiments, the detection and control component 5 may also include other components, depending on the actual situation, and this disclosure does not impose any limitations on this.

[0029] In some embodiments of this disclosure, see Figure 1 and Figure 2The coal mill transfer system disclosed herein also includes an alarm component 6. The alarm component 6 may include conventional components such as buzzers and red light alarms. The alarm component 6 can issue an alarm when the detection element 51 detects the disappearance of negative pressure in the boiler slag well 3, alerting the staff that a malfunction has occurred in the boiler slag well 3. The detection and control component 5 will then close the connecting main pipe 21 to prevent ash or high-temperature flue gas in the boiler slag well 3 from flowing back into the transfer box 1 through the connecting main pipe 21 and connecting branch pipe 22 due to the disappearance of negative pressure, thus affecting the operation of the entire coal mill. Once the negative pressure in the boiler slag well 3 is restored, the connecting main pipe 21 can be reopened to continue using the negative pressure in the boiler slag well 3 to adsorb dust and other impurities in the transfer box 1. Of course, in other embodiments, the alarm component 6 may also include other components, depending on the actual situation; this disclosure does not impose any limitations on this.

[0030] In some embodiments of this disclosure, see Figure 1 and Figure 2 An adjusting component 31 is provided in the boiler slag well 3. By setting the adjusting component 31, the negative pressure in the boiler slag well 3 can be adjusted so that the negative pressure in the boiler slag well 3 is at a suitable intensity to absorb impurities and dust in the transfer box 1. The adjusting component 31 can be an induced draft fan or other components known to those skilled in the art that can adjust negative pressure. The specific type can be determined according to the actual situation, and this disclosure does not limit it.

[0031] When the coal mill transfer system disclosed herein is in use, the control valve group 4 can be controlled by the detection and control component 5 to keep the opening of the connecting main pipe 21 and the connecting branch pipe 22 in a suitable state. This allows the negative pressure in the boiler slag well 3 to adsorb dust and other impurities in the transfer box 1. The impurities adsorbed into the boiler slag well 3 can then be directly incinerated in the boiler slag well 3 for complete treatment without causing environmental pollution.

[0032] A second aspect of this disclosure also provides a coal mill, including the coal mill transfer system described in the above embodiments. By using the coal mill transfer system of this disclosure, negative pressure can be generated by the boiler slag well 3 in the dry slag machine section of the system, which can ensure the cleaning effect of dust and other impurities in the transfer box 1 while also having a lower cost.

[0033] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0034] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0035] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A coal mill transfer system, characterized in that, include: Transfer containers, of which multiple containers are provided, are used to load processed coal gangue; A connecting pipe assembly, comprising a main connecting pipe and multiple branch connecting pipes, wherein the first end of each branch connecting pipe is sealed to one of the transfer boxes, and the second end of each branch connecting pipe is connected to the main connecting pipe; The boiler slag well has a negative pressure inside. One end of the connecting main pipe is closed, and the other end is connected to the boiler slag well. The boiler slag well is used to extract dust and impurities from the transfer box.

2. The coal mill transfer system according to claim 1, characterized in that, The transfer box is provided with a connection hole, which is used to mate with the first end of the connecting pipe to seal the first end of the connecting pipe to the transfer box.

3. The coal mill transfer system according to claim 2, characterized in that, The connection hole is located at the top of the side wall of the transfer box in the vertical direction, and the diameter of the connection hole is 50-80mm.

4. The coal mill transfer system according to claim 1, characterized in that, It also includes a control valve assembly, which is used to control the opening and closing of the main connecting pipe and multiple connecting branch pipes.

5. The coal mill transfer system according to claim 4, characterized in that, The control valve group includes a main pipe valve and multiple branch pipe valves. Each branch pipe valve is connected within a length of 1-1.5m from the transfer box of the connecting branch pipe. The main pipe valve is located at the end of the connecting main pipe near the boiler slag well.

6. The coal mill transfer system according to claim 4, characterized in that, It also includes a detection and control component, which includes a detection element and a control element. The detection element is used to detect the negative pressure in the boiler slag well and the dust concentration in the transfer box. The control element is used to control the opening degree of the control valve group based on the detection data of the detection element.

7. The coal mill transfer system according to claim 6, characterized in that, It also includes an alarm component that can receive the negative pressure in the boiler slag well detected by the detector and issue an alarm based on the negative pressure value.

8. The coal mill transfer system according to claim 1, characterized in that, An adjusting element is provided in the boiler slag well, which is used to adjust the negative pressure in the boiler slag well.

9. The coal mill transfer system according to claim 1, characterized in that, The outer walls of the connecting branch pipe and the connecting main pipe are provided with an anti-corrosion layer.

10. A coal mill, characterized in that, include: The coal mill transfer system according to any one of claims 1-9.

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