Slag storage system and method of operation thereof

Abstract

The application discloses a kind of residue storage systems and working method thereof, belong to tunnel construction equipment technical field, to solve the problem of powdery slag into fan in the existing slagging process, the residue storage system includes residue storage device (5) and negative pressure generating system, residue storage device (5) contains first residue storage tank (501), second residue storage tank (505) and residue discharge pipe (504), the negative pressure generating system can make the air pressure in second residue storage tank (505) less than the air pressure in residue discharge pipe (504), the residue in residue discharge pipe (504) in the process of entering first residue storage tank (501), the small particle residue in the residue, which is smaller than the inner diameter of powdery slag passage (502), can enter second residue storage tank (505).The residue storage system can separately pick out (or filter out) and store powdery slag and large block slag during the slagging process, to avoid powdery slag into fan in the end of slagging main pipeline.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment technology, specifically to a slag storage system and a method for operating such a system. Background Technology

[0002] During the excavation of vertical shafts, the excavation depth can reach hundreds of meters, and the working conditions are particularly harsh. Conventional muck removal methods such as scraper and slurry circulation are inefficient and have complex procedures. However, pneumatic conveying muck removal has been applied to the development of vertical shaft projects due to its advantages such as high muck removal efficiency and simple installation.

[0003] Due to the wide particle size distribution of slag produced by pneumatic slag removal in vertical shaft operations (from less than 1mm to 100mm), coupled with the high kinetic energy and significant losses from impacts with the conveying pipe walls during the transport of large slag chunks, the slag at the end of the conveying system often consists of large slag chunks mixed with a significant amount of powdery slag. In existing technologies, the large slag chunks at the end often fall directly into the slag storage device, while the powdery slag is filtered by a dust removal device along with the airflow, and the filtered air is discharged into the atmosphere by a fan.

[0004] Although the above process filters the powdery slag in the excavated soil, which can prevent it from entering the blower to some extent and protect its safety, the long continuous operation time of the pneumatic conveying system in vertical shaft conditions and the large amount of dust generated by the powdery slag often lead to significant problems in existing technologies, such as increased load on the main pipeline dust removal device, increased frequency of filter replacement, extended downtime of the slag discharge system, and reduced slag discharge efficiency. Furthermore, since the airflow after passing through the dust removal device in existing technologies will re-enter the blower, and the dust removal device cannot completely remove dust, this increases the risk of powdery slag entering the blower. Large blowers are precision components, and prolonged operation of the system poses a significant safety hazard to the blower. Summary of the Invention

[0005] To address the issue of powdery slag entering the blower during the slag discharge process, this invention provides a slag storage system and its operating method. The slag storage system can separately pick out (or filter out) and store powdery slag and large pieces of slag during the slag discharge process, thus solving problems such as high load on the dust removal device and easy slag entry into the blower caused by powdery slag at the end of the main pipeline under the pneumatic slag discharge condition of the vertical shaft.

[0006] The technical solution adopted by the embodiments of the present invention to solve its technical problem is as follows:

[0007] A slag storage system includes a slag storage device and a negative pressure generating system. The slag storage device includes a first slag storage tank, a second slag storage tank, and a slag discharge pipe. The outlet end of the slag discharge pipe is connected to the inside of the first slag storage tank. The pipe wall of the slag discharge pipe is connected to the second slag storage tank through a powdery slag channel. The negative pressure generating system enables the air pressure in the second slag storage tank to be lower than the air pressure in the slag discharge pipe. During the process of the slag in the slag discharge pipe entering the first slag storage tank, small particles of slag with a particle size smaller than the inner diameter of the powdery slag channel can enter the second slag storage tank.

[0008] The beneficial effects of the above technical solution are: the slag storage system can separately pick out (or filter out) powdery slag and large pieces of slag and store them during the slag discharge process, which solves the problems of high load on dust removal device and easy slag entry into the fan caused by powdery slag at the end of the main pipeline under the condition of vertical shaft pneumatic slag discharge, and improves the service life of the fan.

[0009] The first slag storage tank contains a first slag storage cavity. The second slag storage tank and the slag discharge pipe are both located inside the first slag storage tank. The second slag storage tank contains a second slag storage cavity. The slag discharge pipe is in an inclined state, and the outlet end of the slag discharge pipe is lower than the inlet end of the slag discharge pipe. A large particle slag storage cavity is formed between the first slag storage tank and the second slag storage tank.

[0010] Both the first and second slag storage tanks are upright cylindrical structures. A first annular space is formed between the side walls of the first and second slag storage tanks. The slag discharge pipe has a spiral structure and is sleeved between the first and second slag storage tanks.

[0011] The lower side wall of the first slag storage tank is lower than the lower side wall of the second slag storage tank. The upper side wall of the first slag storage tank is shared with the upper side wall of the second slag storage tank. Multiple first through holes are provided on the pipe wall of the slag discharge pipe, and multiple second through holes are provided on the side peripheral wall of the second slag storage tank. The first through holes and the second through holes are connected one-to-one to form multiple powdery slag channels.

[0012] The first slag storage tank has a first interface and a second interface on its upper side wall. The second slag storage tank is fitted with a main air channel. The upper end of the main air channel is connected to the first interface. A second annular space is formed between the side wall of the second slag storage tank and the main air channel. The main air channel passes through the second slag storage tank. The first interface is connected to the large particle slag storage cavity through the main air channel. The second interface is connected to the second slag storage cavity.

[0013] The negative pressure generating system includes a first negative pressure gas transmission main line and a second negative pressure gas transmission main line. Along the direction from the inlet end to the outlet end of the first negative pressure gas transmission main line, a first filter device, a fan, and a first valve are sequentially arranged on the first negative pressure gas transmission main line. Along the direction from one end to the other end of the second negative pressure gas transmission main line, a second filter device, a negative pressure generating unit, a second valve, and a third valve are sequentially arranged on the second negative pressure gas transmission main line. The other end of the second negative pressure gas transmission main line is connected to the inlet end of the first valve. The negative pressure generating system can make the air pressure in the second slag storage chamber and the large particle slag storage chamber both less than one standard atmosphere, and the air pressure in the second slag storage chamber is less than the air pressure in the large particle slag storage chamber.

[0014] The negative pressure generating system also includes a first exhaust branch line and a first exhaust injection branch line. The inlet end of the first exhaust branch line is connected to a first interface, and the outlet end of the first exhaust branch line is connected to the inlet end of the first negative pressure gas transmission main line. A fourth valve is installed on the first exhaust branch line. The inlet end of the first exhaust injection branch line is connected to a second interface, and the outlet end of the first exhaust injection branch line is connected to one end of the second negative pressure gas transmission main line. A fifth valve is installed on the first exhaust injection branch line.

[0015] The negative pressure generating system also includes a first gas injection branch line, the inlet end of which is connected to a second negative pressure gas transmission main line. The connection between the inlet end of the first gas injection branch line and the second negative pressure gas transmission main line is located between a second valve and a third valve. The outlet end of the first gas injection branch line is connected to a second interface. A sixth valve is installed on the first gas injection branch line. The slag storage system also includes a slag discharge main line and a first slag discharge branch line. The inlet end of the first slag discharge branch line is connected to the lower end of the second slag storage tank through a powdered slag discharge pipe. The outlet end of the first slag discharge branch line is connected to the slag discharge main line. A seventh valve is installed on the first slag discharge branch line, allowing the slag in the first slag storage tank to be discharged from the lower end of the first slag storage tank. The slag storage system also includes a slag inlet main line and a first slag inlet branch line. The inlet end of the first slag inlet branch line is connected to the slag inlet main line. The outlet end of the first slag inlet branch line is connected to the inlet end of the slag discharge pipe. An eighth valve is installed on the first slag inlet branch line.

[0016] The slag storage system includes two slag storage devices connected in parallel. When slag enters the first slag storage device, the slag stored in the second slag storage device can be discharged; when slag enters the second slag storage device, the slag stored in the first slag storage device can be discharged.

[0017] A method for operating a slag storage system, wherein the slag storage system employs the aforementioned slag storage system, the slag storage system comprising two slag storage devices connected in parallel, and the method for operating the slag storage system comprising the following steps:

[0018] While the slag is being stored in the first slag storage device, the slag stored in the second slag storage device can be discharged; while the slag is being stored in the second slag storage device, the slag stored in the first slag storage device can be discharged.

[0019] The beneficial effects of the embodiments of the present invention are:

[0020] 1. This invention solves the problems of high load, high replacement frequency, long downtime, and easy entry of powdery slag into the blower caused by powdery slag at the end of the main pipeline under the condition of pneumatic slag removal in vertical shafts, thereby improving the service life of the blower.

[0021] 2. This invention can realize the separation and classified transportation of powdery slag in large slag blocks under vertical shaft conditions, effectively reducing the dust removal load of the main air pipeline of the blower, reducing the replacement frequency of the dust removal device of the main pipeline, preventing powdery slag from entering the blower, improving the safety of blower operation, saving construction costs, and improving construction efficiency. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the slag storage system described in this invention.

[0024] Figure 2 This is a schematic diagram of a slag storage device.

[0025] Figure 3 This is a schematic diagram of the slag storage device during slag storage.

[0026] Figure 4 This is a schematic diagram of the slag storage device during slag discharge.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. First negative pressure gas transmission main line; 101. Fan; 102. First filter device;

[0029] 2. Second negative pressure gas transmission main line; 201. Second filter device;

[0030] 3. Negative pressure generating unit;

[0031] 401. First pressure detection unit; 402. Second pressure detection unit; 403. Third pressure detection unit; 404. Fourth pressure detection unit;

[0032] 5. Slag storage device; 501. First slag storage tank; 502. Powdered slag channel; 503. First interface; 504. Slag discharge pipe; 505. Second slag storage tank; 506. Main air channel; 507. Powdered slag discharge pipe; 508. Second interface;

[0033] 6. Main slag discharge pipe; 601. Seventh valve; 602. Tenth valve; 603. First slag discharge branch pipe; 604. Second slag discharge branch pipe;

[0034] 7. Main slag inlet pipe; 701. Eighth valve; 702. Eleventh valve; 703. First slag inlet branch pipe; 704. Second slag inlet branch pipe;

[0035] 801. Fifth valve; 802. Twelfth valve; 803. First exhaust gas injection branch line; 804. Second exhaust gas injection branch line;

[0036] 901, Fourth Valve; 902, Thirteenth Valve; 903, First Exhaust Branch Pipeline; 904, Second Exhaust Branch Pipeline;

[0037] 10. Ninth valve;

[0038] 1101, Sixth Valve; 1102, Fourteenth Valve; 1103, First Gas Injection Branch Line; 1104, Second Gas Injection Branch Line;

[0039] 12. Second valve; 13. Third valve; 14. First valve. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 1 The paper surface is pointed outwards from the paper surface; "back" indicates perpendicular to the direction of the paper surface. Figure 1 The orientation term refers to the paper surface and points inwards from the paper surface. This invention is described from the perspective of a reader or user, but the aforementioned directional terms should not be understood or interpreted as limiting the scope of protection of this invention.

[0042] like Figure 1 and Figure 2As shown in the figure, a slag storage system according to an embodiment of the present invention includes a slag storage device 5 and a negative pressure generating system. The slag storage device 5 includes a first slag storage tank 501, a second slag storage tank 505, and a slag discharge pipe 504. The outlet end of the slag discharge pipe 504 is connected to the inside of the first slag storage tank 501. The pipe wall of the slag discharge pipe 504 is connected to the second slag storage tank 505 through a powdery slag channel 502. The negative pressure generating system can make the air pressure in the second slag storage tank 505 lower than the air pressure in the slag discharge pipe 504. During the process of the slag in the slag discharge pipe 504 entering the first slag storage tank 501, small particles of slag with a particle size smaller than the inner diameter of the powdery slag channel 502 (i.e., powdery slag) can enter the second slag storage tank 505, while large particles of slag with a particle size greater than or equal to the inner diameter of the powdery slag channel 502 (i.e., large lumps of slag) can enter the first slag storage tank 501.

[0043] Inside the slag discharge pipe 504, as the airflow carries the slag into the first slag storage tank 501, the powdery slag (particle size smaller than the inner diameter of the powdery slag channel 502) enters the second slag storage tank 505 through the powdery slag channel 502 for storage, while the large pieces of slag (particle size greater than or equal to the inner diameter of the powdery slag channel 502) ultimately enter the first slag storage tank 501 for storage. The slag storage system can separately pick out (or filter out) and store the powdery slag and large pieces of slag during the slag discharge process, solving the problems of high load on the dust removal device and easy slag entry into the fan caused by powdery slag at the end of the main pipeline under the vertical shaft pneumatic slag discharge condition.

[0044] like Figure 1 and Figure 2 As shown, the first slag storage tank 501 contains a first slag storage cavity, the second slag storage tank 505 and the slag discharge pipe 504 are located inside the first slag storage tank 501, the second slag storage tank 505 contains a second slag storage cavity, the second slag storage cavity is used to store the powdery slag, the slag discharge pipe 504 is in an inclined state, the slag in the slag discharge pipe 504 can move downwards by gravity, the outlet end of the slag discharge pipe 504 is lower than the inlet end of the slag discharge pipe 504, a large particle slag storage cavity is formed between the first slag storage tank 501 and the second slag storage tank 505, the large particle slag storage cavity is used to store the large pieces of slag.

[0045] In this embodiment, both the first slag storage tank 501 and the second slag storage tank 505 are upright cylindrical structures. Both the upper and lower ends of the first slag storage tank 501 and the second slag storage tank 505 are closed. Both the first slag storage tank 501 and the second slag storage tank 505 contain an upper side wall, a peripheral side wall, and a lower side wall connected sequentially from top to bottom. A first annular space is formed between the peripheral side wall of the first slag storage tank 501 and the peripheral side wall of the second slag storage tank 505. The slag discharge pipe 504 has a spiral structure and is sleeved between the first slag storage tank 501 and the second slag storage tank 505. The axis of the slag discharge pipe 504 coincides with the axis of the second slag storage tank 505.

[0046] like Figure 1 and Figure 2 As shown, the lower sidewall of the first slag storage tank 501 is lower than the lower sidewall of the second slag storage tank 505. The lower sidewall of the second slag storage tank 505 and the lower sidewall of the first slag storage tank 501 are spaced apart vertically. The upper sidewall of the first slag storage tank 501 and the upper sidewall of the second slag storage tank 505 are shared. The wall of the slag discharge pipe 504 is provided with a plurality of first through holes, which are arranged at intervals along the extension direction of the slag discharge pipe 504. The sidewall of the second slag storage tank 505 is provided with a plurality of second through holes. The first through holes and the second through holes are connected one-to-one to form a plurality of powdery slag channels 502.

[0047] In this embodiment, a first interface 503 and a second interface 508 are provided on the upper side wall of the first slag storage tank 501. A main air channel 506 is provided inside the second slag storage tank 505. The main air channel 506 is in an upright state. The upper end of the main air channel 506 is connected to the first interface 503. A second annular space is formed between the side wall of the second slag storage tank 505 and the main air channel 506. The second annular space is used to store powdery slag (also called powdery slag cavity). The main air channel 506 passes through the lower side wall of the second slag storage tank 505. The first interface 503 is connected to the large particle slag storage cavity through the main air channel 506. The lower end of the main air channel 506 is located above the lower side wall of the first slag storage tank 501. The second interface 508 is connected to the second slag storage cavity, especially the second interface 508 is connected to the second annular space.

[0048] like Figure 1 and Figure 2 As shown, the negative pressure generating system includes a first negative pressure gas transmission main line 1 and a second negative pressure gas transmission main line 2. Along the direction from the inlet end to the outlet end of the first negative pressure gas transmission main line 1, a first filter device 102, a fan 101, and a first valve 14 are sequentially arranged on the first negative pressure gas transmission main line 1. Along the direction from one end to the other end of the second negative pressure gas transmission main line 2, a second filter device 201, a negative pressure generating unit 3, a second valve 12, and a third valve 13 are sequentially arranged on the second negative pressure gas transmission main line 2. The other end of the second negative pressure gas transmission main line 2 is connected to the inlet end of the first valve 14. The negative pressure generating system enables the air pressure in the second slag storage chamber (especially the second annular space) and the large particle slag storage chamber to be less than one standard atmosphere, and the air pressure in the second slag storage chamber is less than the air pressure in the large particle slag storage chamber, thereby allowing the powdery slag in the slag discharge pipe 504 to enter the second slag storage tank 505.

[0049] A ninth valve 10 is also installed on the second negative pressure gas transmission main line 2. The ninth valve 10 is located at one end of the second negative pressure gas transmission main line 2 and between the second filter device 201. The first filter device 102 and the second filter device 201 are both located in the existing small particle slag filter device and are used to filter out powdery slag in the gas flow. The negative pressure generating unit 3 can be an existing technology product that can generate negative pressure, such as a venturi tube, a vacuum pump, a jet pump, etc.

[0050] In this embodiment, the negative pressure generating system further includes a first exhaust branch line 903 and a first exhaust injection branch line 803. The inlet end of the first exhaust branch line 903 is connected to the first interface 503, and the outlet end of the first exhaust branch line 903 is connected to the inlet end of the first negative pressure gas transmission main line 1. A fourth valve 901 is provided on the first exhaust branch line 903. The inlet end of the first exhaust injection branch line 803 is connected to the second interface 508, and the outlet end of the first exhaust injection branch line 803 is connected to one end of the second negative pressure gas transmission main line 2. A fifth valve 801 is provided on the first exhaust injection branch line 803.

[0051] like Figure 1 and Figure 2 As shown, the negative pressure generating system also includes a first gas injection branch line 1103. The inlet end of the first gas injection branch line 1103 is connected to the second negative pressure gas transmission main line 2. The connection between the inlet end of the first gas injection branch line 1103 and the second negative pressure gas transmission main line 2 is located between the second valve 12 and the third valve 13. The outlet end of the first gas injection branch line 1103 is connected to the second interface 508. A sixth valve 1101 is provided on the first gas injection branch line 1103.

[0052] The slag storage system also includes a slag discharge main pipe 6 and a first slag discharge branch pipe 603. The inlet end of the first slag discharge branch pipe 603 is connected to the lower end of the second slag storage tank 505 through a powdered slag discharge pipe 507. The outlet end of the first slag discharge branch pipe 603 is connected to the slag discharge main pipe 6. A seventh valve 601 is installed on the first slag discharge branch pipe 603, and the slag in the first slag storage tank 501 can be discharged from the lower end of the first slag storage tank 501.

[0053] like Figure 1 and Figure 2 As shown, the slag storage system also includes a main slag inlet pipe 7 and a first slag inlet branch pipe 703. The inlet end of the first slag inlet branch pipe 703 is connected to the main slag inlet pipe 7, and the outlet end of the first slag inlet branch pipe 703 is connected to the inlet end of the slag discharge pipe 504. The inlet end of the slag discharge pipe 504 is located at the upper part of the first slag storage tank 501, and the outlet end of the slag discharge pipe 504 is located at the middle part of the first slag storage tank 501. An eighth valve 701 is provided on the first slag inlet branch pipe 703.

[0054] The working process of the slag storage system is described below: The negative pressure generating system draws air from the first interface 503 through the first exhaust branch line 903 to create a negative pressure in the large particle slag storage cavity of the first slag storage tank 501. The negative pressure generating system draws air from the second interface 508 through the first exhaust and air injection branch line 803 to create a negative pressure in the second annular space of the second slag storage tank 505. The air pressure in the second annular space is less than the air pressure in the large particle slag storage cavity. The difference between the air pressure in the second annular space and the air pressure in the large particle slag storage cavity is a set value, which can be obtained through a limited number of experiments. The airflow carrying the slag enters the slag discharge pipe 504 through the inlet. As the slag enters the first slag storage tank 501, powdery slag (particle size smaller than the inner diameter of the powdery slag channel 502) passes through the powdery slag channel 502 and enters the second slag storage tank 505 for storage. Larger pieces of slag (particle size greater than or equal to the inner diameter of the powdery slag channel 502) ultimately enter the first slag storage tank 501 for storage. The lower side wall of the first slag storage tank 501 can be opened or closed. Figure 3 As shown.

[0055] The negative pressure generating system can not only extract air but also inject air. When the amount of slag in the first slag storage tank 501 and the second slag storage tank 505 reaches a set value, the lower end of the first slag storage tank 501 can be opened. The lower side wall of the first slag storage tank 501 is similar to a door, and the slag in the first slag storage tank 501 can be discharged from the lower end of the first slag storage tank 501. The negative pressure generating system sequentially injects air into the second annular space in the second slag storage tank 505 through the first air injection branch line 1103 and the first exhaust air injection branch line 803 from the second interface 508, and creates positive pressure in the second annular space in the second slag storage tank 505, so that the slag in the second slag storage tank 505 can be discharged from the powdered slag discharge pipe 507. Figure 4 As shown.

[0056] like Figure 1 and Figure 2 As shown, in order to improve the working efficiency of the slag storage system and enable the system to continuously discharge, store, and release slag, the slag storage system includes two slag storage devices 5. The two slag storage devices 5 have the same structure, are symmetrical about each other and are mirror images of each other, and are connected in parallel. When slag enters the first slag storage tank 501 and the second slag storage tank 505 of the first slag storage device 5, the slag stored in the first slag storage tank 501 and the second slag storage tank 505 of the second slag storage device 5 can be discharged; when slag enters the first slag storage tank 501 and the second slag storage tank 505 of the second slag storage device 5, the slag stored in the first slag storage tank 501 and the second slag storage tank 505 of the first slag storage device 5 can be discharged.

[0057] Specifically, the negative pressure generating system also includes a second exhaust branch line 904 and a second exhaust gas injection branch line 804. The inlet end of the second exhaust branch line 904 is connected to the first interface 503 of the second slag storage device 5, and the outlet end of the second exhaust branch line 904 is connected to the inlet end of the first negative pressure gas transmission main line 1. A thirteenth valve 902 is installed on the second exhaust branch line 904. The inlet end of the second exhaust gas injection branch line 804 is connected to the second interface 508 of the second slag storage device 5, and the outlet end of the second exhaust gas injection branch line 804 is connected to one end of the second negative pressure gas transmission main line 2. A twelfth valve 802 is installed on the second exhaust gas injection branch line 804.

[0058] The inlet end of the first exhaust branch line 903 is connected to the first interface 503 of the first slag storage device 5, the outlet end of the first exhaust branch line 903 is connected to the inlet end of the first negative pressure gas transmission main line 1, and a fourth valve 901 is installed on the first exhaust branch line 903. The inlet end of the first exhaust gas injection branch line 803 is connected to the second interface 508 of the first slag storage device 5, the outlet end of the first exhaust gas injection branch line 803 is connected to one end of the second negative pressure gas transmission main line 2, and a fifth valve 801 is installed on the first exhaust gas injection branch line 803.

[0059] like Figure 1 and Figure 2 As shown, the negative pressure generating system also includes a second gas injection branch line 1104. The inlet end of the second gas injection branch line 1104 is connected to the second negative pressure gas transmission main line 2. The connection between the inlet end of the second gas injection branch line 1104 and the second negative pressure gas transmission main line 2 is located between the second valve 12 and the third valve 13. The outlet end of the second gas injection branch line 1104 is connected to the second interface 508 of the second slag storage device 5. A fourteenth valve 1102 is provided on the second gas injection branch line 1104.

[0060] The inlet end of the first gas injection branch line 1103 is connected to the second negative pressure gas transmission main line 2. The connection between the inlet end of the first gas injection branch line 1103 and the second negative pressure gas transmission main line 2 is located between the second valve 12 and the third valve 13. The outlet end of the first gas injection branch line 1103 is connected to the second interface 508 of the first slag storage device 5. A sixth valve 1101 is provided on the first gas injection branch line 1103.

[0061] like Figure 1 and Figure 2As shown, the slag storage system also includes a second slag discharge branch pipe 604. The inlet end of the second slag discharge branch pipe 604 is connected to the lower end of the second slag storage tank 505 of the second slag storage device 5 through the powdered slag discharge pipe 507 of the second slag storage device 5. The outlet end of the second slag discharge branch pipe 604 is connected to the slag discharge main pipe 6. A tenth valve 602 is provided on the second slag discharge branch pipe 604, and the slag in the first slag storage tank 501 of the second slag storage device 5 can be discharged from the lower end of the first slag storage tank 501 of the second slag storage device 5.

[0062] The inlet end of the first slag discharge branch pipe 603 is connected to the lower end of the second slag storage tank 505 of the first slag storage device 5 through the powdered slag discharge pipe 507 of the first slag storage device 5. The outlet end of the first slag discharge branch pipe 603 is connected to the slag discharge main pipe 6. A seventh valve 601 is installed on the first slag discharge branch pipe 603, and the slag in the first slag storage tank 501 of the first slag storage device 5 can be discharged from the lower end of the first slag storage tank 501 of the first slag storage device 5.

[0063] The slag storage system also includes a second slag inlet branch pipe 704. The inlet end of the second slag inlet branch pipe 704 is connected to the slag inlet main pipe 7, and the outlet end of the second slag inlet branch pipe 704 is connected to the inlet end of the slag discharge pipe 504 of the second slag storage device 5. An eleventh valve 702 is provided on the second slag inlet branch pipe 704.

[0064] like Figure 1 and Figure 2 As shown, the inlet end of the first slag inlet branch pipe 703 is connected to the slag inlet main pipe 7, and the outlet end of the first slag inlet branch pipe 703 is connected to the inlet end of the slag discharge pipe 504 of the first slag storage device 5. An eighth valve 701 is provided on the first slag inlet branch pipe 703.

[0065] A first pressure detection unit 401 is externally connected to the second interface 508 of the first slag storage device 5. The first pressure detection unit 401 can detect the air pressure of the second annular space of the first slag storage device 5. A second pressure detection unit 402 is connected to the first slag storage tank 501 of the first slag storage device 5. The second pressure detection unit 402 can detect the air pressure of the large particle slag storage chamber of the first slag storage device 5.

[0066] like Figure 1 and Figure 2 As shown, a third pressure detection unit 403 is externally connected to the second interface 508 of the second slag storage device 5. The third pressure detection unit 403 can detect the air pressure in the second annular space of the second slag storage device 5. A fourth pressure detection unit 404 is connected to the first slag storage tank 501 of the second slag storage device 5. The fourth pressure detection unit 404 can detect the air pressure in the large particle slag storage chamber of the second slag storage device 5.

[0067] The following describes a method for operating a slag storage system. This system utilizes the aforementioned slag storage system, which includes two parallel slag storage devices 5. The method for operating the slag storage system comprises the following steps:

[0068] While the slag is being stored in the first slag storage device 5, the slag stored in the second slag storage device 5 can be discharged; while the slag is being stored in the second slag storage device 5, the slag stored in the first slag storage device 5 can be discharged.

[0069] The working method of the slag storage system is described in detail below:

[0070] Step 1: During the initial system operation, first open valves 701 (eighth), 901 (fourth), and 14 (first). Then, turn on fan 101 and run it under no-load (i.e., without transporting slag). Check and adjust the pressure detection units. First, check if the second pressure detection unit 402 is functioning correctly. Then, open valves 801 (fifth), 10 (ninth), 12 (second), and 13 (third). Check the pressure value of the first pressure detection unit 401 and adjust the opening of valves 13 and 14 to ensure that the pressure difference ΔP between the pressure values ​​of the first and second pressure detection units 401 and 402 is within the set range.

[0071] like Figure 1 and Figure 2 As shown, when this value is within the set range, it indicates that the pressure difference between the pressure inside the powdery slag chamber and the pressure inside the large particle slag storage chamber is within the set range. After completing the adjustment of the first slag storage device 5, the second slag storage device 5 is adjusted using the same method. The specific process is as follows: Based on the adjustment process of the first slag storage device 5, the fifth valve 801 is closed, the twelfth valve 802 is opened, and the third valve 13 and the first valve 14 are adjusted to make the pressure difference ΔP between the pressure value of the third pressure detection unit 403 and the pressure value of the fourth pressure detection unit 404 within the set range.

[0072] Step 2: After completing the above adjustments, the waste soil transportation begins. First, the first waste soil storage device 5 is used as the storage device. Once the first waste soil storage device 5 reaches its maximum storage capacity, the second waste soil storage device 5 is then used as the storage device, while the first waste soil storage device 5 begins unloading. Similarly, once the second waste soil storage device 5 reaches its maximum storage capacity, the first waste soil storage device 5 is used again, while the second waste soil storage device 5 begins unloading. This alternating operation ensures uninterrupted waste soil transportation and unloading, guaranteeing transportation efficiency. The specific operating procedure is as follows:

[0073] Open valves 701 (eighth), 901 (fourth), and 14 (first), then turn on the blower 101. Simultaneously open valves 13 (third), 12 (second), 801 (fifth), and 10 (ninth). Adjust valves 13 and 14 in real time based on the pressure difference ΔP between the pressure values ​​of the first pressure detection unit 401 and the second pressure detection unit 402 to ensure the pressure difference between the powdery slag chamber and the large-particle slag storage chamber remains within a set range. Once large slag pieces have entered the large-particle slag storage chamber and reached their upper limit, open valves 702 (eleventh) and 902, and close valves 701 (eighth) and 901, allowing the large slag pieces to enter the second slag storage device 5. At the same time, the twelfth valve 802 is opened and the fifth valve 801 is closed to pump air and reduce pressure in the powdery slag chamber of the second slag storage device 5. The third valve 13 and the first valve 14 are adjusted to ensure that the pressure difference ΔP between the pressure value of the third pressure detection unit 403 and the pressure value of the fourth pressure detection unit 404 is within the set range.

[0074] After the second slag storage device 5 begins storing slag, the first slag storage device 5 begins unloading slag. Large pieces of slag are unloaded from the bottom of the first slag storage tank 501. After the large pieces of slag are unloaded, the sixth valve 1101 is opened, and the airflow generated by the blower 101 can be injected into the powdery slag chamber of the first slag storage device 5 through the first air injection branch line 1103, increasing the pressure inside the powdery slag chamber. When the predetermined pressure is reached, the seventh valve 601 is opened, and the powdery slag is transported to the slag discharge main pipe 6 under positive pressure. After unloading is completed, the sixth valve 1101 and the seventh valve 601 are closed.

[0075] Once the second slag storage device 5 reaches its upper limit, the first slag storage device 5 begins storing slag, while the second slag storage device 5 simultaneously unloads slag. The eighth valve 701 and the fourth valve 901 are opened, and the eleventh valve 702 and the thirteenth valve 902 are closed to ensure that large pieces of slag enter the first slag storage device 5. Simultaneously, the fifth valve 801 is opened, and the twelfth valve 802 is closed to evacuate and depressurize the powdery slag chamber within the first slag storage device 5. The third valve 13 and the first valve 14 are adjusted to ensure that the pressure difference ΔP between the pressure values ​​of the first pressure detection unit 401 and the second pressure detection unit 402 is within the set range.

[0076] like Figure 1 and Figure 2As shown, after the first slag storage device 5 begins storing slag, the second slag storage device 5 begins unloading slag. Large pieces of slag are unloaded from the bottom of the first slag storage tank 501 of the second slag storage device 5. After the large pieces of slag are unloaded, the fourteenth valve 1102 is opened, and the airflow generated by the blower 101 can be injected into the powdered slag chamber of the second slag storage device 5 through the second air injection branch line 1104, increasing the pressure inside the powdered slag chamber. When the predetermined pressure is reached, the tenth valve 602 is opened, and the powdered slag is transported to the slag discharge main pipe 6 through positive pressure. After unloading is completed, the fourteenth valve 1102 and the tenth valve 602 are closed.

[0077] In the above process, by coordinating the valves, the pressure inside the powdery slag chambers of the two slag storage devices 5 can be made positive and negative respectively, ensuring that the slag storage and unloading of the two slag storage devices do not interfere with each other and operate efficiently.

[0078] Step 3: Repeat the process in Step 2 to separate and transport the powdery slag separately. At the same time, the two slag storage devices work alternately to achieve efficient slag storage and discharge.

[0079] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of protection of the present invention, should still fall within the scope of the present invention. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used.

Claims

1. A slag storage system, characterized in that, The slag storage system includes a slag storage device (5) and a negative pressure generating system. The slag storage device (5) includes a first slag storage tank (501), a second slag storage tank (505), and a slag discharge pipe (504). The outlet end of the slag discharge pipe (504) is connected to the inside of the first slag storage tank (501). The pipe wall of the slag discharge pipe (504) is connected to the second slag storage tank (505) through a powdery slag channel (502). The negative pressure generating system can make the air pressure in the second slag storage tank (505) lower than the air pressure in the slag discharge pipe (504). During the process of the slag in the slag discharge pipe (504) entering the first slag storage tank (501), small particles of slag with a particle size smaller than the inner diameter of the powdery slag channel (502) can enter the second slag storage tank (505). The first slag storage tank (501) contains a first slag storage cavity. The second slag storage tank (505) and the slag discharge pipe (504) are both located inside the first slag storage tank (501). The second slag storage tank (505) contains a second slag storage cavity. The slag discharge pipe (504) is in an inclined state. The outlet end of the slag discharge pipe (504) is lower than the inlet end of the slag discharge pipe (504). A large particle slag storage cavity is formed between the first slag storage tank (501) and the second slag storage tank (505).

2. The slag storage system according to claim 1, characterized in that, The first slag storage tank (501) and the second slag storage tank (505) are both upright cylindrical structures. A first annular space is formed between the side walls of the first slag storage tank (501) and the side walls of the second slag storage tank (505). The slag discharge pipe (504) has a spiral structure and is sleeved between the first slag storage tank (501) and the second slag storage tank (505).

3. The slag storage system according to claim 2, characterized in that, The lower side wall of the first slag storage tank (501) is lower than the lower side wall of the second slag storage tank (505). The upper side wall of the first slag storage tank (501) is shared with the upper side wall of the second slag storage tank (505). The slag discharge pipe (504) has multiple first through holes on its pipe wall, and the second slag storage tank (505) has multiple second through holes on its side wall. The first through holes and the second through holes are connected one-to-one to form multiple powdery slag channels (502).

4. The slag storage system according to claim 3, characterized in that, The first slag storage tank (501) is provided with a first interface (503) and a second interface (508) on its upper side wall. The second slag storage tank (505) is provided with a main air channel (506). The upper end of the main air channel (506) is connected to the first interface (503). A second annular space is formed between the side wall of the second slag storage tank (505) and the main air channel (506). The main air channel (506) passes through the second slag storage tank (505). The first interface (503) is connected to the large particle slag storage cavity through the main air channel (506). The second interface (508) is connected to the second slag storage cavity.

5. The slag storage system according to claim 4, characterized in that, The negative pressure generating system includes a first negative pressure gas transmission main line (1) and a second negative pressure gas transmission main line (2). Along the direction from the inlet end of the first negative pressure gas transmission main line (1) to the outlet end of the first negative pressure gas transmission main line (1), a first filter device (102), a fan (101) and a first valve (14) are arranged in sequence. Along the direction from one end of the second negative pressure gas transmission main line (2) to the other end of the second negative pressure gas transmission main line (2), a second filter device (201), a negative pressure generating unit (3), a second valve (12) and a third valve (13) are arranged in sequence. The other end of the second negative pressure gas transmission main line (2) is connected to the inlet end of the first valve (14). The negative pressure generating system can make the air pressure in the second slag storage chamber and the large particle slag storage chamber less than one standard atmosphere, and the air pressure in the second slag storage chamber is less than the air pressure in the large particle slag storage chamber.

6. The slag storage system according to claim 5, characterized in that, The negative pressure generating system also includes a first exhaust branch line (903) and a first exhaust injection branch line (803). The inlet end of the first exhaust branch line (903) is connected to the first interface (503), the outlet end of the first exhaust branch line (903) is connected to the inlet end of the first negative pressure gas transmission main line (1), a fourth valve (901) is provided on the first exhaust branch line (903), the inlet end of the first exhaust injection branch line (803) is connected to the second interface (508), the outlet end of the first exhaust injection branch line (803) is connected to one end of the second negative pressure gas transmission main line (2), and a fifth valve (801) is provided on the first exhaust injection branch line (803).

7. The slag storage system according to claim 5, characterized in that, The negative pressure generating system also includes a first gas injection branch line (1103), the inlet end of which is connected to the second negative pressure gas transmission main line (2), the connection between the inlet end of the first gas injection branch line (1103) and the second negative pressure gas transmission main line (2) is located between the second valve (12) and the third valve (13), the outlet end of the first gas injection branch line (1103) is connected to the second interface (508), and a sixth valve (1101) is provided on the first gas injection branch line (1103). The slag storage system also includes a slag discharge main pipe (6) and a first slag discharge branch pipe (603). The inlet end of the first slag discharge branch pipe (603) is connected to the lower end of the second slag storage tank (505) through a powdered slag discharge pipe (507). The outlet end of the first slag discharge branch pipe (603) is connected to the slag discharge main pipe (6). A seventh valve (601) is provided on the first slag discharge branch pipe (603). The slag in the first slag storage tank (501) can be discharged from the lower end of the first slag storage tank (501). The slag storage system also includes a slag inlet main pipe (7) and a first slag inlet branch pipe (703). The inlet end of the first slag inlet branch pipe (703) is connected to the slag inlet main pipe (7), and the outlet end of the first slag inlet branch pipe (703) is connected to the inlet end of the slag discharge pipe (504). An eighth valve (701) is provided on the first slag inlet branch pipe (703).

8. The slag storage system according to claim 1, characterized in that, The slag storage system includes two slag storage devices (5), which are connected in parallel. When the slag enters the first slag storage device (5) for storage, the slag stored in the second slag storage device (5) can be discharged; when the slag enters the second slag storage device (5) for storage, the slag stored in the first slag storage device (5) can be discharged.

9. A method for operating a slag storage system, characterized in that, The slag storage system operates using the slag storage system described in claim 1, the slag storage system comprising two parallel slag storage devices (5), and the operating method of the slag storage system comprising the following steps: During the process of the slag entering the first slag storage device (5), the slag stored in the second slag storage device (5) can be discharged; during the process of the slag entering the second slag storage device (5), the slag stored in the first slag storage device (5) can be discharged.

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