A method for eliminating vibration of a dry quenching auxiliary coal economizer

Abstract

The application discloses a method for eliminating the vibration of a dry quenching auxiliary economizer, and relates to the technical field of dry quenching outside a furnace, which comprises the following steps: after discovering abnormal vibration of the auxiliary economizer, a handheld vibration detector is used to monitor the tube box of the auxiliary economizer; when the vibration speed of a local point of the tube box shell is not less than 6.5 mm / s, it is judged that the vibration source is the tube box shell, the heat preservation layer of the tube box is removed, the shell is reinforced by using a profile steel, and the abnormal vibration is eliminated; when the vibration speed of multiple points around the tube box shell is not less than 6.5 mm / s, it is judged that the vibration source is the tube box inner row pipe, the machine is stopped, the row pipe attachments are washed by high-pressure water, if the abnormal vibration is not eliminated, a flow guide device is installed on the row pipe, and the abnormal vibration is eliminated. Through the method, the cause of the abnormal vibration of the auxiliary economizer during operation can be quickly judged, the fault can be treated in time, the water leakage accident caused by the severe abrasion of the internal row pipe due to the long-time abnormal vibration can be prevented, and the method has the beneficial effects of saving cost and reducing the maintenance time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry quenching, in particular to a method for eliminating abnormal vibration of a dry quenching auxiliary economizer. BACKGROUND

[0002] The dry quenching device in the coking industry is equipped with an auxiliary economizer, which is installed in the air duct between the dry quenching circulating fan and the dry quenching furnace, and is used to recover the end heat of the circulating gas.

[0003] The auxiliary economizer often causes abnormal vibration of the body due to factors such as design, wear, corrosion, fouling, and frequency conversion of the fan in the initial, middle, and late stages of use. If production is continued by reducing the dry quenching capacity, it will have an adverse effect on production. Moreover, in actual production, it is often difficult to quickly judge and handle the abnormal vibration of the auxiliary economizer with a large volume, and it is also necessary to stop the machine several times to check the internal and external changes and find the problem, which brings certain disturbance to the efficient operation of the enterprise. SUMMARY

[0004] Based on the above problems, the present application provides a method for eliminating abnormal vibration of a dry quenching auxiliary economizer.

[0005] The present application provides a method for eliminating abnormal vibration of a dry quenching auxiliary economizer, which comprises: after discovering abnormal vibration of the auxiliary economizer, using a handheld vibration detector to monitor the tube box of the auxiliary economizer; when the local point vibration speed of the tube box shell is not less than 6.5 mm / s, judging that the vibration source is the tube box shell, removing the insulation layer of the tube box and reinforcing the shell with a section steel until the abnormal vibration is eliminated; when the multi-point vibration speed around the tube box shell is not less than 6.5 mm / s, judging that the vibration source is the tube box inner row pipe, stopping the machine to perform high-pressure water flushing of the row pipe attachments, and if the abnormal vibration is still not eliminated, installing a flow guide device on the row pipe until the abnormal vibration is eliminated.

[0006] In some embodiments, when there is an abnormal sound in the frequency conversion speed range of the dry quenching circulating fan, it is judged that the auxiliary economizer is abnormally vibrated.

[0007] In some embodiments, the flow guide device comprises a flow guide plate and a plurality of U-shaped clamps, the flow guide plate and the U-shaped clamps are fixedly connected, and the single pipes of the row pipes are arranged in the clamping grooves of the U-shaped clamps; the flow guide device is installed between the adjacent two row pipes in the tube box, the U-shaped clamp connected with the top of the flow guide plate is sleeved on the single pipe of one side of the row pipe, and the U-shaped clamp connected with the bottom of the flow guide plate is sleeved on the single pipe of the other side of the row pipe.

[0008] In some embodiments, the U-shaped clamp connected with the top of the flow guide plate is sleeved on the top single pipe of one side of the row pipe, and the U-shaped clamp connected with the bottom of the flow guide plate is sleeved on the bottom single pipe of the other side of the row pipe.

[0009] In some embodiments, the flow guide plate comprises a plurality of flow guide fins arranged between two adjacent rows of pipes in the same plane, the width of each flow guide fin is less than the manhole size of the pipe box, and each flow guide fin is connected to a U-shaped clamp.

[0010] In some embodiments, the top of the flow guide fin is connected to at least two U-shaped clamps, and the bottom of the flow guide fin is connected to at least two U-shaped clamps.

[0011] In some embodiments, the flow guide plate and the clamp leg of the U-shaped clamp are fixedly connected by welding.

[0012] In some embodiments, the flow guide plate further comprises a backing plate provided with a mounting hole, and the clamp leg of the U-shaped clamp is arranged in the mounting hole, so that the backing plate is located between the single pipe and the flow guide plate when the flow guide device is installed on the single pipe.

[0013] In some embodiments, the flow guide plate, the U-shaped clamp and the backing plate are made of the same metal material, and the thickness is controlled between 3mm and 6mm.

[0014] In some embodiments, only a single row of flow guide devices is arranged between two adjacent rows of pipes in the pipe box, and 3 to 5 rows of flow guide devices are installed at equal intervals in the pipe box.

[0015] The application has the following beneficial effects: a method for eliminating the vibration of the dry quenching auxiliary economizer is provided, after the abnormal vibration of the auxiliary economizer is found, the pipe box of the auxiliary economizer is monitored by a handheld vibration detector; when the local point vibration speed of the pipe box shell is not less than 6.5mm / s, it is judged that the vibration source is the pipe box shell, the heat preservation layer of the pipe box is removed and the shell is reinforced with a profile steel until the abnormal vibration is eliminated; when the multi-point vibration speed around the pipe box shell is not less than 6.5mm / s, it is judged that the vibration source is the row pipe in the pipe box, the row pipe is stopped and high-pressure water is used to flush the attachments, if the abnormal vibration is still not eliminated, a flow guide device is installed on the row pipe until the abnormal vibration is eliminated. Through the method, the cause of the abnormal vibration of the auxiliary economizer in operation can be quickly judged, and the fault can be timely treated, the abnormal vibration is eliminated by destroying the resonance frequency of the original medium and the row pipe, and the leakage accident of the boiler water caused by the severe wear of the internal row pipe due to long-term abnormal vibration is prevented; compared with the original multiple shutdown inspection and replacement of the pipe box, the method has the beneficial effects of saving cost and reducing maintenance time. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application.

[0017] Figure 1A flowchart of a method for eliminating the vibration of a dry quenching secondary economizer according to the present application is shown in the figure;

[0018] Figure 2 A structural diagram of a secondary economizer according to the present application is shown in the figure;

[0019] Figure 3 A structural diagram of a flow guide device according to the present application is shown in the figure;

[0020] Figure 4 A diagram of a partial structure of a flow guide device according to the present application installed on the row pipe of the pipe box of a secondary economizer is shown in the figure.

[0021] The figure shows: 11-pipe box shell, 12-row pipe, 13-manhole, 20-flow guide device, 21-flow guide plate, 22-U-shaped clamp, 23-pad plate, 31-outlet header, 32-inlet header. DETAILED DESCRIPTION

[0022] The present embodiment discloses a method for eliminating the vibration of a dry quenching secondary economizer, which is shown in the figure. Figure 1 The method comprises: during the operation of a dry quenching device, it is found that the secondary economizer is abnormally vibrating, including Figure 1 When it is found that the sound is abnormal within the frequency conversion speed range of the dry quenching circulating fan, it is determined that the secondary economizer is abnormally vibrating.

[0023] After it is found that the secondary economizer is abnormally vibrating, a handheld vibration meter is used to monitor the pipe box of the secondary economizer to obtain the vibration speed of each area of the pipe box shell 11.

[0024] When it is found that the vibration speed of the local point of the pipe box shell 11 is not less than 6.5 mm / s, in detail, the vibration speed of the part of the area of the pipe box shell 11 is not less than 6.5 mm / s, but the vibration speed of other more areas is less than the value, in this case, it is determined that the vibration speed of the local point of the shell 11 is large, and it is further determined that the vibration source in this case is the pipe box shell 11, which is shown in the figure. Figure 1 The insulation layer of the pipe box is removed, and the shell is reinforced with a profile steel, for example, the profile steel is used as a pipe box support frame to reinforce the pipe box, until the abnormal vibration is eliminated.

[0025] When it is found that the vibration speed of the multiple points around the pipe box shell 11 is not less than 6.5 mm / s, in detail, the vibration speed of the area with a large number of the pipe box shell 11 is not less than 6.5 mm / s, in this case, it is determined that the vibration speed of the multiple points around the shell 11 is large.

[0026] The region where the point vibration speed is not less than 6.5 mm / s is one or two regions, and the region where the multi-point vibration speed of the shell 11 is not less than 6.5 mm / s is a large number of regions.

[0027] When it is judged that the multi-point vibration speed of the shell 11 is large, it is further judged that the vibration source in this case is the tube bank 12 in the shell 11, please refer to Figure 1 , first stop the high-pressure water flushing of the tube bank 12, judge whether the abnormal vibration is eliminated, if eliminated, the repair process is completed; if not, install the flow guide device 20 on the tube bank 12 until the abnormal vibration is eliminated.

[0028] The method for eliminating the vibration of the dry quenching secondary economizer in the embodiment can quickly judge the cause of the abnormal vibration of the secondary economizer in use, and timely treat the fault, so as to eliminate the abnormal vibration by destroying the resonance frequency of the original medium and the tube bank, and prevent the leakage accident of the boiler water caused by the severe wear of the internal tube bank due to long-term abnormal vibration. Compared with the original multiple shutdown inspection and replacement of the tube bank, the method has the beneficial effects of saving cost and reducing repair time.

[0029] 5 Please refer to Figure 2 , the tube bank of the secondary economizer includes a tube bank shell 11, a tube bank 12 installed in the shell 11, and a manhole 13 opened in the tube bank shell 11. Please refer to Figure 4 , the tube bank 12 in the shell 11 is distributed in the form of multiple rows, and further includes an outlet header 31 and an inlet header 32 connected with all the tube banks 12.

[0030] Regarding the flow guide device 20, please refer to Figure 3 , the flow guide device 20 includes a flow guide plate 21 and a plurality of U-shaped clamps 22,

[0031] The flow guide plate 21 and the clamp leg of the U-shaped clamp 22 are fixedly connected, and the single tube of the tube bank 12 is arranged in the clamp groove of the U-shaped clamp 22. Please refer to Figure 4 , the flow guide device 20 is installed between the adjacent two tube banks 12 in the tube bank, and part of the U

[0032] shaped clamps 22 are connected with the top of the flow guide plate 21, and the other part of the U-shaped clamps 22 are connected with the bottom of the flow guide plate 21. The U-shaped clamp 22 connected with the top of the flow guide plate 21 is sleeved on the single tube of one side of the tube bank 12, and the U-shaped clamp 22 connected with the bottom of the flow guide plate 21 is sleeved on the single tube of the other side of the tube bank 12. In Figure 4 , one of the adjacent two tube banks 12 is represented by a solid line, and the other tube bank 12 is represented by a dashed line, so as to be distinguished.

[0033] 5The flow guide device 20 can be quickly and easily installed on the tube bank, and the original resonance frequency of the medium and the tube bank is destroyed, so as to achieve the purpose of eliminating abnormal vibration.

[0034] In some embodiments, referring to Figure 4 The U-shaped clamp 22 connected to the top of the flow guide plate 21 is sleeved on the top single tube of one side of the tube bank 12, and the U-shaped clamp 22 connected to the bottom of the flow guide plate 21 is sleeved on the bottom single tube of the other side of the tube bank 12.

[0035] Figure 4 In some embodiments, a flow guide device 20 is arranged between two adjacent tube banks 12 in the form of a row, and in some embodiments, a plurality of flow guide devices 20 are installed in the tube bank, and different flow guide devices 20 are arranged between different tube banks 12. In some embodiments, the plurality of flow guide devices 20 are equidistantly distributed. In some embodiments, the number of flow guide devices 20 installed in the tube bank is 3-5.

[0036] Regarding the fixed connection of the flow guide plate 21 and the clamping leg of the U-shaped clamp 22, it can be welded; or the clamping leg can be provided with a bolt on one side, and the bolt can prevent the flow guide plate 21 from being separated from the U-shaped clamp 22.

[0037] In some embodiments, referring to Figure 4 The flow guide plate 21 further comprises a backing plate 23, the backing plate 23 is provided with a mounting hole, and the clamping leg of the U-shaped clamp 22 is sleeved in the mounting hole, so that the backing plate 23 is located between the single tube and the flow guide plate 21 under the condition that the flow guide device 20 is installed on the single tube of the tube bank 12. The backing plate 23 has the beneficial effect of improving the abrasion damage of the flow guide plate 21 that shakes under the influence of wind during operation to the tube bank.

[0038] In some embodiments, the flow guide plate 21, the U-shaped clamp 22 and the backing plate 23 are made of the same metal material and have certain wear resistance and strength, and the thickness of the flow guide plate 21, the U-shaped clamp 22 and the backing plate 23 is controlled to be between 3-6mm.

[0039] In some embodiments, referring to Figure 4 The flow guide plate 21 comprises a plurality of flow guide pieces, and the flow guide plate 21 in the flow guide device 20 is arranged between two adjacent tube banks 12 in a manner that the plurality of flow guide pieces are distributed on the same plane, the adjacent two flow guide pieces are closely arranged, and the spacing can be controlled to be 5-30mm, and the number of flow guide pieces in each flow guide plate 21 is determined by the width of the tube bank in the tube bank.

[0040] In addition, in combination with Figure 2 and Figure 4The guide vane has a width and a length, the width of the single guide vane is limited to be less than the manhole 13 size of the tube box, so as to smoothly enter the tube box; the length of the single guide vane is greater than the height size of the tube bank 12, so as to facilitate on-site installation. The guide vane is connected with the U-shaped clamp 22, and the guide vane is installed on the tube bank 12 through the U-shaped clamp 22.

[0041] In some embodiments, at least two U-shaped clamps 22 are connected to the top of the guide vane, and at least two U-shaped clamps 22 are connected to the bottom of the guide vane. Figure 4 As shown in the middle, the guide vane is connected with four U-shaped clamps 22, and by arranging multiple U-shaped clamps 22, the operation stability of the guide plate 21 is improved.

[0042] It should be further pointed out that the U-shaped bending radius of the U-shaped clamp 22 is slightly greater than the outer diameter of the single tube of the tube bank 12.

[0043] The guide device 20 provided by the embodiment has the advantages of small volume, simple structure, lightness, convenience for on-site installation, and the like, and the method reasonably utilizes the small gap between the tube banks to solve the technical problem.

[0044] The method for eliminating the vibration of the dry quenching auxiliary economizer provided by the embodiment includes analysis and judgment steps and processing methods when the auxiliary economizer generates abnormal vibration, and the vibration problem causes are determined according to the flow shown in Figure 1 , and the problem can be quickly and accurately solved according to the corresponding guidance method, the hidden danger caused by the equipment vibration is solved, the production management cost is reduced, and the efficient operation of the dry quenching is facilitated.

[0045] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.

[0046] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for eliminating vibration in a dry quenching coke economizer, characterized in that, include: When there is an abnormal sound during the operation of the dry quenching circulating fan within the variable frequency speed regulation range, it is determined to be an abnormal vibration of the auxiliary economizer. After abnormal vibration of the sub-economizer was detected, a handheld vibration meter was used to monitor the tube box of the sub-economizer. When the vibration velocity at a local point on the outer shell of the pipe box is not less than 6.5 mm / s, it is determined that the vibration source is the outer shell of the pipe box. The insulation layer of the pipe box is removed and the outer shell is reinforced with steel profiles until the abnormal vibration is eliminated. When the vibration velocity at multiple points around the outer shell of the pipe box is not less than 6.5 mm / s, it is determined that the vibration source is the pipe inside the pipe box. The machine is stopped and the attachments on the pipe are flushed with high-pressure water. If the abnormal vibration is still not eliminated, a flow guiding device is installed on the pipe until the abnormal vibration is eliminated.

2. The method as described in claim 1, characterized in that, The flow guiding device includes a flow guiding plate and multiple U-shaped clips. The legs of the flow guiding plate and the U-shaped clips are fixedly connected, and a single tube of the pipe is inserted into the slot of the U-shaped clip. The flow guiding device is installed between two adjacent pipes in the pipe box. The U-shaped clip connected to the top of the flow guiding plate is sleeved on a single pipe of one side of the pipe, and the U-shaped clip connected to the bottom of the flow guiding plate is sleeved on a single pipe of the other side of the pipe.

3. The method as described in claim 2, characterized in that, The U-shaped clip connected to the top of the guide plate is sleeved on the top single tube of the pipe on one side, and the U-shaped clip connected to the bottom of the guide plate is sleeved on the bottom single tube of the pipe on the other side.

4. The method as described in claim 2, characterized in that, The guide plate includes multiple guide vanes, which are arranged in a planar manner between two adjacent pipes. The width of a single guide vane is smaller than the manhole size of the pipe box. Each guide vane is connected to a U-shaped clamp and is installed on the pipe via the U-shaped clamp.

5. The method as described in claim 4, characterized in that, The top of the flow guide plate is connected to at least two of the U-shaped clips, and the bottom of the flow guide plate is connected to at least two of the U-shaped clips.

6. The method as described in claim 2, characterized in that, The guide plate and the U-shaped clip legs are fixedly connected by welding.

7. The method according to any one of claims 2-6, characterized in that, The guide plate also includes a pad with a mounting hole. The clamping leg of the U-shaped clip passes through the mounting hole so that, when the guide device is installed on the single pipe of the pipe, the pad is positioned between the single pipe and the guide plate.

8. The method as described in claim 7, characterized in that, The guide plate, the U-shaped clip, and the pad are all made of the same metal material, and their thickness is controlled between 3mm and 6mm.

9. The method as described in claim 7, characterized in that, Only a single row of the flow guiding device is installed between two adjacent rows of pipes in the pipe box, and 3 to 5 rows of the flow guiding device are installed at equal intervals in the pipe box.

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