An emergency cooling tower, a wet fly ash collection device and a collection method

Abstract

The present invention discloses a wet fly ash collection device, comprising: a wet fly ash collection box, which is arranged below the pipeline of the quench tower and communicates with the pipeline of the quench tower. Wet fly ash will settle into the wet fly ash collection box. An ash outlet is arranged at the bottom of the wet fly ash collection box, and the ash outlet is in a normally closed state; a knife gate valve, which is a normally open valve. When collecting wet fly ash, the wet fly ash collection box is isolated from the outside world, so that the entry of outside cold air can be avoided. When cleaning the wet fly ash, the wet fly ash collection box is isolated from the pipeline of the quench tower by inserting the knife gate valve. In this way, the cold air is blocked outside the pipeline of the quench tower by the knife gate valve. Whether in the stage of collecting wet fly ash or in the stage of cleaning wet fly ash, the entry of cold air can be prevented, thereby preventing the formation of additional wet fly ash and ensuring the stability of the internal pressure of the quench tower at the same time. The present invention also discloses a quench tower and a method for collecting wet fly ash.

Description

Technical Field

[0001] The present invention relates to the field of quenching towers, and more particularly to a quenching tower, a wet fly ash collecting device and a collecting method. Background Art

[0002] The hazardous waste incineration system primarily consists of a hazardous waste loading system, a hazardous waste incineration system, a waste heat utilization system, and an exhaust gas treatment system. The entire system is a negative pressure system. The exhaust gas treatment system includes SNCR denitrification, flue gas quenching, dry deacidification, and activated carbon adsorption facilities. The quenching tower's primary function is to quench the flue gas.

[0003] In the quench tower, the flue gas is cooled by a process water spray system. The heat energy of the flue gas instantly vaporizes the process water, which not only cools the flue gas but also ensures that it contains no water droplets, allowing the flue gas to carry dry fly ash into the bag filter collection device.

[0004] However, during the operation of the spray system, poor atomization effect often occurs due to poor water quality, which causes the fly ash to absorb moisture and stick to the wall and deposit, resulting in wet fly ash blockage at the bottom of the quenching tower.

[0005] To address the problem of wet fly ash clogging, those skilled in the art have installed a hopper at the bottom of the quench tower to collect the wet fly ash. However, this hopper causes a large amount of cold air to enter the quench tower through the hopper, resulting in more wet fly ash. Furthermore, the influx of cold air also affects the internal pressure of the quench tower.

[0006] Therefore, how to prevent the ingress of cold air from the outside to prevent the formation of additional wet fly ash while avoiding affecting the internal pressure of the quenching tower is a key issue that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0007] The present invention aims to design a wet fly ash collection device that can prevent the ingress of cold air from the outside, thereby preventing the formation of additional wet fly ash and simultaneously avoiding affecting the internal pressure of the quench tower. To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A wet fly ash collection device comprising:

[0009] A wet fly ash collection box is provided below the quench tower pipeline and is in communication with the quench tower pipeline. The wet fly ash will settle into the wet fly ash collection box. An ash outlet is provided at the bottom of the wet fly ash collection box and is in a normally closed state.

[0010] The plug valve, the plug valve is a normally open valve, an insertion port cooperating with the plug valve is provided at the upper part of the wet fly ash collection box, and when the plug valve is fitted to the insertion port, the quench tower pipeline and the wet fly ash collection box are isolated from each other.

[0011] Preferably, it further includes a lower pressure monitoring device, the lower pressure monitoring device includes a lower pressure gauge and a lower pressure tapping pipe, the lower pressure tapping pipe is communicated with the wet fly ash collection box, and there is a first preset distance between the lower pressure tapping pipe and the bottom of the wet fly ash collection box.

[0012] Preferably, it further includes a first plant air pipeline, and the first plant air pipeline can be communicated with the lower pressure tapping pipe.

[0013] Preferably, a flow meter is arranged in the first plant air pipeline for detecting the air flow condition in the first plant air pipeline.

[0014] Preferably, an upper pressure monitoring device is provided at the upper part of the insertion port, the upper pressure monitoring device includes an upper pressure gauge and an upper pressure tapping pipe, the upper pressure tapping pipe is communicated with the wet fly ash collection box; when the plug valve is closed, the upper pressure monitoring device is used to detect the pressure value at the insertion port.

[0015] Preferably, it further includes a second plant air pipeline, and the second plant air pipeline can be communicated with the lower pressure tapping pipe.

[0016] Preferably, a quick-opening door is provided on the side of the wet fly ash collection box for the ash cleaning device to enter.

[0017] Preferably, the quick-opening door is a circular door, and the quick-opening door is connected to the side of the wet fly ash collection box by bolts.

[0018] Preferably, the quench tower pipeline includes a quench tower main pipeline and a horizontal flue gas pipeline, and the quench tower main pipeline and the horizontal flue gas pipeline are arranged at an angular shape;

[0019] The wet fly ash collection box is arranged below the horizontal flue gas pipeline, and there is a second preset distance between the wet fly ash collection box and the quench tower main pipeline.

[0020] The present invention also provides a quench tower, including a wet fly ash collection device, and the wet fly ash collection device is any one of the above-mentioned wet fly ash collection devices.

[0021] The present invention also provides a method for collecting wet fly ash, based on the wet fly ash collection device as described above, and includes the following steps:

[0022] A method for collecting wet fly ash, based on the wet fly ash collection device as described above, is characterized in that it includes the following steps:

[0023] S1: Determine whether the pressure value of the lower pressure gauge is negative. If it is, then wait; if not, then proceed to step S2;

[0024] S2: Open the first plant air duct;

[0025] S3: Determine whether there is a flow value on the flow meter. If there is, then close the first plant air duct, and then proceed to step S1; if not, then proceed to step S4;

[0026] S4: Close the first plant air duct;

[0027] S5: Close the flap valve;

[0028] S6: Determine whether the value on the upper pressure gauge is stable. If not, then proceed to step S5; if it is, then proceed to step S7;

[0029] S7: Determine whether the value on the upper pressure gauge is negative. If not, then open the second plant air duct, close the second plant air duct after a preset time, and then proceed to step S6; if it is, then proceed to step S8;

[0030] S8: Open the ash discharge port.

[0031] It can be seen from the above technical solutions that: in the present invention, when collecting wet fly ash, the wet fly ash collection box is isolated from the outside world, so that the entry of outside cold air can be avoided. When cleaning the wet fly ash, the wet fly ash collection box is isolated from the quench tower pipeline by inserting a flap valve. In this way, the cold air is blocked outside the quench tower pipeline by the flap valve. Whether in the stage of collecting wet fly ash or in the stage of cleaning wet fly ash, the entry of cold air can be prevented, so as to prevent the formation of additional wet fly ash, and at the same time, the stability of the pressure inside the quench tower can be ensured.

[0032] It should also be noted that the flap opening faces the side of the wet fly ash. During the ash cleaning process, the wet fly ash in the quench tower pipeline will settle on the flap valve when passing through the wet fly ash collection box. After the ash cleaning is completed, when the flap valve is withdrawn, the ash accumulated on the flap valve will be peeled off by the edge part of the flap opening into the wet fly ash collection box. That is, in the present invention, the settlement of the wet fly ash in the quench tower pipeline will not be affected when cleaning the wet fly ash. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Structural schematic diagram of the wet fly ash collection device provided by a specific embodiment of the present invention;

[0035] Figure 2 Enlarged view at the wet fly ash collection box provided by a specific embodiment of the present invention;

[0036] Figure 3 Flow chart of the wet fly ash collection method provided by a specific embodiment of the present invention.

[0037] Among them, 1 is the wet fly ash collection box, 2 is the slide valve, 3 is the upper pressure gauge, 4 is the lower pressure gauge, 5 is the quick opening door, 6 is the horizontal flue gas pipeline, 7 is the main pipeline of the quench tower, 8 is the upper pressure tapping pipe, 9 is the lower pressure tapping pipe, 10 is the flow meter, 11 is the second plant air pipeline, and 12 is the first plant air pipeline. Specific embodiments

[0038] The present invention discloses a wet fly ash collection device, which can prevent the entry of external cold air to prevent the formation of additional wet fly ash and avoid affecting the internal pressure of the quench tower. The present invention also discloses a quench tower and a wet fly ash collection method.

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0040] The present invention discloses a wet fly ash collection device, including a wet fly ash collection box 1 and a slide valve 2. The wet fly ash collection box 1 is arranged below the flue gas, and the wet fly ash collection box 1 is communicated with the quench tower pipeline. The wet fly ash in the quench tower pipeline will settle under the action of gravity, and the wet fly ash will settle into the wet fly ash collection box 1 when passing above the wet fly ash collection box 1, thus completing the collection of wet fly ash. An ash outlet is arranged at the bottom of the wet fly ash collection box 1, and the ash outlet is in a normally closed state.

[0041] The slide valve 2 is a normally open valve, and an insertion port cooperating with the slide valve 2 is arranged at the upper part of the wet fly ash collection box 1. When it is necessary to clean the accumulated ash in the wet fly ash collection box 1, the slide valve 2 is inserted into the insertion port to isolate the wet fly ash collection box 1 from the quench tower pipeline, and then the ash outlet is opened to clean the accumulated ash in the wet fly ash collection box 1.

[0042] In the prior art, the hopper is arranged to connect the quench tower pipeline with the outside, resulting in cold air entering the quench tower pipeline, accelerating the formation of wet fly ash, and affecting the internal pressure of the quench tower. In the present invention, when collecting wet fly ash, the wet fly ash collection box 1 is isolated from the outside, thus avoiding the entry of outside cold air. When cleaning the wet fly ash, the wet fly ash collection box 1 is isolated from the quench tower pipeline by inserting the plug valve 2. In this way, the cold air is blocked outside the quench tower pipeline by the plug valve 2. Whether in the stage of collecting wet fly ash or in the stage of cleaning wet fly ash, the entry of cold air can be prevented, thereby preventing the formation of additional wet fly ash and ensuring the stability of the internal pressure of the quench tower at the same time.

[0043] It should also be noted that the plug opening faces the side of the wet fly ash. During the ash cleaning process, the wet fly ash in the quench tower pipeline will settle on the plug valve 2 when passing through the wet fly ash collection box 1. After the ash cleaning is completed, when the plug valve 2 is withdrawn, the ash accumulated on the plug valve 2 will be stripped to the inside of the wet fly ash collection box 1 by the edge part of the plug opening. That is, in the present invention, the settlement of the wet fly ash in the quench tower pipeline will not be affected when cleaning the wet fly ash.

[0044] The present invention is provided with a lower pressure monitoring device, which includes a lower pressure gauge 4 and a lower pressure tapping pipe 9. The lower pressure tapping pipe 9 is communicated with the wet fly ash collection box 1, and there is a first preset distance between the lower pressure tapping pipe 9 and the bottom of the wet fly ash collection box 1.

[0045] Since the pressure in the quench tower pipeline is negative pressure (-200 Pa), under normal circumstances, the value of the lower pressure gauge 4 is negative. When the ash accumulated in the wet fly ash collection box 1 covers the lower pressure tapping pipe 9, the value on the lower pressure gauge 4 will show zero or a positive value. This indicates that the ash accumulated in the wet fly ash collection box 1 has covered the lower pressure tapping pipe 9, so the wet fly ash collection box 1 needs to be cleaned of ash.

[0046] It should be noted that the first preset distance is also the height of the ash accumulation. In a specific embodiment of the present invention, the first preset distance is set to one-third of the height of the wet fly ash collection box 1.

[0047] It should also be noted that when the lower pressure tapping pipe 9 is blocked, the lower pressure tapping pipe 9 needs to be unblocked. For this purpose, the present invention is provided with a first plant air pipeline 12, and a first valve is arranged on the first plant air pipeline 12. When it is necessary to blow air into the lower pressure tapping pipe 9, first close the root valve of the lower pressure gauge 4 (arranged close to the lower pressure gauge 4 and used to control the conduction or cut-off between the lower pressure gauge 4 and the lower pressure tapping pipe 9), and then open the first valve. The first plant air pipeline 12 blows 0.5 MPa of plant air into the lower pressure tapping pipe 9, so that the lower pressure tapping pipe 9 can be unblocked. After the treatment is completed, close the first valve.

[0048] As described above, when the ash accumulation in the wet fly ash collection box 1 covers the lower pressure tapping pipe 9, the lower pressure gauge 4 will show a non - negative value. If the lower pressure tapping pipe 9 becomes blocked, the lower pressure gauge 4 will also show a non - negative value. Then, is the reason for the lower pressure gauge 4 showing a non - negative value that the lower pressure tapping pipe 9 is blocked, or because the ash accumulation has covered the lower pressure tapping pipe 9?

[0049] To solve this problem, the present invention introduces a flow meter 10 and sets the flow meter 10 on the lower pressure tapping pipe 9. If the lower pressure gauge 4 shows a non - negative value, first open the first valve on the first plant air duct 12. After the flow meter 10 stabilizes, if there is a flow shown on the flow meter 10, it indicates that the reason for the lower pressure gauge 4 showing a non - negative value is that the lower pressure tapping pipe 9 is blocked. The explanation is as follows: Only when there is a blockage in the lower pressure tapping pipe 9, after blowing air from the first plant air duct 12 to the lower pressure tapping pipe 9, the blockage in the lower pressure tapping pipe 9 is removed, the lower pressure tapping pipe 9 and the quench tower pipe become conductive, and there is air flow in the lower pressure tapping pipe 9, will the flow meter 10 show a flow value.

[0050] After the flow meter 10 stabilizes, if there is no flow shown on the flow meter 10, it indicates that the reason for the lower pressure gauge 4 being non - negative is that the ash accumulation in the wet fly ash collection box 1 has covered the lower pressure tapping pipe 9. The explanation is as follows: Only when the accumulated fly ash covers the lower pressure tapping pipe 9, after opening the first plant air duct 12, since the ash blocks the orifice of the lower pressure tapping pipe 9, there will be no air flow or only a very small air flow in the lower pressure tapping pipe 9, and then the flow meter 10 will show no flow or a very small flow.

[0051] In addition to the lower pressure monitoring device, the present invention also sets an upper pressure monitoring device. The upper pressure monitoring device is arranged above the plug - plate opening of the wet fly ash collection box 1. The upper pressure monitoring device includes an upper pressure gauge 3 and an upper pressure tapping pipe 8. The upper pressure tapping pipe 8 is connected to the wet fly ash collection box 1. After inserting the plug - plate valve 2 into the plug - plate opening of the wet fly ash collection box 1 and when the ash discharge port is in the open state, the pressure value at the plug - plate opening is detected by using the upper pressure monitoring device.

[0052] If the pressure value shown on the upper pressure gauge 3 is an unstable value, it indicates that the plug - plate valve 2 is not inserted in place, and the external air flow enters the quench tower pipe through the gap between the ash discharge port, the plug - plate valve 2 and the plug - plate opening. Then, the plug - plate valve 2 needs to be re - inserted to install it in place. In this way, the stability of the internal pressure of the quench tower pipe is effectively ensured.

[0053] If the upper pressure gauge 3 shows a stable negative value, it indicates that the plug - plate valve 2 is inserted in place and ash cleaning can be carried out.

[0054] Another situation is that the upper pressure gauge 3 shows a stable non - negative value, indicating that the upper pressure - tapping pipe 8 is blocked. To solve this problem, the present invention also introduces a second plant air duct 11, on which a second valve is provided. If the upper pressure - tapping pipe 8 is blocked, first close the root valve of the upper pressure gauge 3, and then open the second valve. The second plant air duct 11 blows air into the upper pressure - tapping pipe 8 to remove the blockage in the upper pressure - tapping pipe 8.

[0055] To facilitate ash cleaning, the present invention also provides a quick - opening door 5 on the side of the wet fly - ash collection box 1. When ash cleaning is required, open the ash outlet, and at the same time open the quick - opening door 5. The ash - cleaning device enters the wet fly - ash collection box 1 through the opening of the quick - opening door 5, causing the internal accumulated ash to be discharged through the ash outlet. The ash - cleaning device can specifically be a spade.

[0056] To facilitate the movement of the ash - cleaning device, the present invention sets the opening of the quick - opening door 5 to be circular. Correspondingly, the quick - opening door 5 is set to be circular. In addition, the quick - opening door 5 is connected to the side of the wet fly - ash collection box 1 by bolts. When it needs to be opened, just unscrew the bolts.

[0057] Next, the position of the wet fly - ash collection box 1 is introduced: The quench tower pipe specifically includes a quench tower main pipe 7 and a horizontal flue gas pipe 6. The quench tower main pipe 7 and the horizontal flue gas pipe 6 are arranged at an angular shape. The upper port of the quench tower main pipe 7 is the flue gas inlet. The lower port of the quench tower main pipe 7 is connected to one end of the horizontal flue gas pipe 6, forming a corner. The wet fly - ash collection box 1 is arranged below the horizontal flue gas pipe 6.

[0058] The applicant found that: If the distance between the wet fly - ash collection box 1 and the quench tower main pipe 7 is too large, the wet fly - ash will settle upstream of the wet fly - ash collection box 1 and settle on the inner wall of the horizontal flue gas pipe 6, resulting in blockage of the quench tower pipe. If the distance between the wet fly - ash collection box 1 and the vertical flue gas is too small, not only wet fly - ash but also dry fly - ash will appear in the wet fly - ash collection box 1, thus increasing the ash - cleaning workload.

[0059] The applicant also found that: The flue gas enters the quench tower main pipe 7 from above the quench tower main pipe 7. At the corner formed by the quench tower main pipe 7 and the horizontal flue gas pipe 6, the flow direction of the flue gas flow changes by 90°, and at the same time, the flow velocity of the flue gas flow will temporarily decrease and then regain a higher flow velocity. Since wet fly - ash is heavier than dry fly - ash, the dry fly - ash will regain a higher flow velocity before the wet fly - ash. For a quench tower pipe with a determined size and a flue gas flow with a determined flow velocity, a second preset distance can always be determined to ensure that the wet fly - ash exactly settles into the wet fly - ash collection box 1, and at the same time ensure that the dry fly - ash has regained a higher flow velocity when passing through the wet fly - ash collection box 1 to follow the flue gas flow.

[0060] In a specific embodiment of the present invention, the inner diameter of the main pipe of the quench tower is 1.8 meters, the inner diameter of the horizontal flue gas pipe 6 is 0.8 meters, and the flow rate of the flue gas is 1.5 - 2 m / s. The size of the wet fly ash collection box 1 is 0.8m * 0.8m * 1m (length * width * height). The distance from one side of the wet fly ash collection box 1 near the corner to the central axis of the main pipe of the quench tower 7 is 1.5 meters. The corner is the corner formed by the main pipe of the quench tower 7 and the horizontal flue gas pipe 6.

[0061] The present invention also discloses a quench tower, including a wet fly ash collection device. In particular, the wet fly ash collection device is any one of the above wet fly ash collection devices. The above wet fly ash collection device has the above effects, and the quench tower with the above wet fly ash collection device also has the above effects, so it will not be repeated here.

[0062] The present invention also discloses a method for collecting wet fly ash. Based on the wet fly ash collection device described above, it includes the following steps:

[0063] S1: Determine whether the pressure value of the lower pressure gauge is negative. If so, it means that the accumulated ash in the wet fly ash collection box has not covered the lower pressure tapping pipe yet, and there is no need to perform ash cleaning treatment, so wait; if not, then go to step S2;

[0064] S2: Open the first plant air pipeline, and the first plant air pipeline blows air into the lower pressure tapping pipe;

[0065] S3: Determine whether there is a flow value on the flow meter. If so, it means that the lower pressure tapping pipe is blocked, and the first plant air pipeline blows air into the lower pressure tapping pipe to remove the blockage, then close the first plant air pipeline, and then go to step S1; if not, then go to step S4;

[0066] S4: Close the first plant air pipeline;

[0067] S5: Close the slide valve;

[0068] S6: Determine whether the value on the upper pressure gauge is stable. If not, it means that the slide valve is not inserted in place, then go to step S5; if so, then go to step S7;

[0069] S7: Determine whether the value on the upper pressure gauge is negative. If not, then open the second plant air pipeline, and close the second plant air pipeline after a preset time to complete the blockage cleaning treatment of the upper pressure tapping pipe, then go to step S6; if so, then go to step S8;

[0070] S8: Open the ash outlet and open the quick-opening door to perform ash cleaning treatment.

[0071] Finally, it should also be noted that the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for collecting wet fly ash, characterized in that, Based on the wet fly ash collection device, the wet fly ash collection device includes: a wet fly ash collection box, which is arranged below the quench tower pipeline and communicates with the quench tower pipeline. Wet fly ash will settle into the wet fly ash collection box. An ash outlet is arranged at the bottom of the wet fly ash collection box, and the ash outlet is in a normally closed state; a slide valve, the slide valve is a normally open valve. An insertion port cooperating with the slide valve is arranged at the upper part of the wet fly ash collection box. When the slide valve is fitted to the insertion port, the quench tower pipeline and the wet fly ash collection box are isolated from each other; a lower pressure monitoring device, the lower pressure monitoring device includes a lower pressure gauge and a lower pressure tapping pipe. The lower pressure tapping pipe communicates with the wet fly ash collection box, and there is a first preset distance between the lower pressure tapping pipe and the bottom of the wet fly ash collection box. An upper pressure monitoring device is arranged above the insertion port. The upper pressure monitoring device includes an upper pressure gauge and an upper pressure tapping pipe. The upper pressure tapping pipe communicates with the wet fly ash collection box. When the slide valve is closed, the upper pressure monitoring device is used to detect the pressure value at the insertion port; a first plant air pipeline, the first plant air pipeline can communicate with the lower pressure tapping pipe. A flow meter is arranged in the first plant air pipeline to detect the air flow condition in the first plant air pipeline; a second plant air pipeline, the second plant air pipeline can communicate with the upper pressure tapping pipe; the wet fly ash collection method includes the following steps: S1: Judge whether the pressure value of the lower pressure gauge is negative pressure. If so, wait; if not, then go to step S2; S2: Open the first plant air pipeline; S3: Judge whether there is a flow value on the flow meter. If so, close the first plant air pipeline, and then go to step S1; if not, then go to step S4; S4: Close the first plant air pipeline; S5: Close the slide valve; S6: Judge whether the value on the upper pressure gauge is stable. If not, then go to step S5; if so, then go to step S7; S7: Judge whether the value on the upper pressure gauge is negative. If not, then open the second plant air pipeline, close the second plant air pipeline after a preset time, and then go to step S6; if so, then go to step S8; S8: Open the ash outlet.

2. The wet fly ash collection method according to claim 1, wherein When the lower pressure gauge shows a non - negative value, open the first valve on the first plant air pipeline; after the flow meter stabilizes; when there is a flow shown on the flow meter, it indicates that the reason for the lower pressure gauge showing a non - negative value is that the lower pressure tapping pipe is blocked; after the flow meter stabilizes, if there is no flow shown on the flow meter, it indicates that the reason for the lower pressure gauge being non - negative is that the accumulated ash in the wet fly ash collection box has covered the lower pressure tapping pipe.

3. The wet fly ash collection method according to claim 1, characterized in that, A quick - opening door is arranged on the side of the wet fly ash collection box for the ash cleaning device to enter.

4. The wet fly ash collection method according to claim 3, characterized in that, The quick - opening door is a circular door, and the quick - opening door is connected to the side of the wet fly ash collection box by bolts.

5. The wet fly ash collection method according to claim 1, wherein, The quench tower pipeline includes a quench tower main pipeline and a horizontal flue gas pipeline, and the quench tower main pipeline and the horizontal flue gas pipeline are arranged at an angle; The wet fly ash collection box is arranged below the horizontal flue gas pipeline, and there is a second preset distance between the wet fly ash collection box and the quench tower main pipeline.

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