A cyclone-type sootblower and method of use

Abstract

The present application relates to the field of soot blower equipment, in particular to a cyclone type soot blower and a using method, the soot blower comprises a horn body, a flange plate is fixed on the horn body, a shell is fixed on the flange plate towards the opening side of the horn body;A vibration barrier is fixed between the shell and the horn body, and the vibration barrier is fixed with the edge of the shell to form a closed space;A plurality of cyclone through holes are formed on the flange plate, which allow the airflow to form a surrounding flow direction around the horn body, the cyclone through hole is communicated with the outside cavity of the horn body, and the cyclone through hole comprises a vertical section, a bending section and an inclined section in sequence from the small section of the horn body to the large section direction, and the hole center axis of the inclined section is inclined at a preset angle with the surface of the flange plate;The method comprises introducing compressed air into the plurality of cyclone through holes on the flange plate fixed on the horn body and fixedly connected with the shell and the vibration barrier, to the outside wall of the horn body;The introduced compressed air forms a surrounding flow after passing through the cyclone through hole to form a surrounding flow around the horn body.The present application can improve the blowing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of soot blower equipment, in particular to a cyclone type soot blower and a use method. BACKGROUND

[0002] The sound wave soot blower is a method for removing the soot on the heating surface of a boiler by using the sound field energy, which is completely different from other soot removal technologies. The sound wave soot blower emits sound waves through a specific structure into a closed space to be cleaned, so as to play a soot removal function. The sound wave soot blower is composed of a sound energy device, a sound amplification tube, a gas path control box and an electric control unit.

[0003] The sound wave soot blower has a large soot blowing area and can be used for cleaning the soot on the heating surface of a boiler during production and operation, such as the water wall, the superheater, the economizer, the preheater and the flue, so as to prevent serious slagging and avoid the weakening of heat transfer of the heating surface of the boiler, which reduces the thermal efficiency of the boiler. In addition, the sound wave soot blower can prevent the soot on the heating surface and serious slagging from causing an unexpected shutdown of the boiler.

[0004] However, the sound wave soot blower has a high temperature in the environment during use, produces a large noise, emits sound waves with a high frequency, has a simple horn mouth, emits sound waves with a low and unstable sound pressure level, and thus needs to be insulated and soundproofed. In addition, the horn body needs to be protected. Generally, a shell is added outside the horn body of the sound transmission pipe of the sound wave soot blower. However, in this case, there is a gap between the shell and the horn body. During operation, the gas source has a low pressure, while the internal pressure of the boiler reactor is high, which causes negative pressure and makes floating and sinking objects enter the sound wave soot blower, causing blockage and affecting the soot blowing efficiency. In view of the above problems, a glass wool heat insulation layer is usually added between the shell and the horn body, which has a certain heat insulation effect and can also solve the blockage problem. However, the material requirement is high, the cost is high, the heat insulation effect is not ideal, the glass wool is not resistant to high temperature, and the glass wool emits harmful gases after being heated by high temperature, which is harmful to the health of the on-site personnel. In addition, although the existing sound wave soot blower can prevent the generation of accumulated soot, it is difficult to clean the existing accumulated soot. Some methods add a blockage prevention valve, but the blockage prevention valve itself is also prone to accumulation and blockage. SUMMARY

[0005] One of the purposes of the present application is to provide a cyclone type soot blower to protect the dust between the horn body and the shell at a lower cost.

[0006] The cyclone type soot blower in the present application comprises a horn body, a flange plate is fixed on the horn body, a shell is fixed on the flange plate towards the opening side of the horn body, and the shell is sleeved on the outside of the horn body.

[0007] A vibration isolation layer is fixed between the shell and the horn body, the vibration isolation layer is fixed with the edge of the shell and forms a closed space.

[0008] The flange plate is provided with a plurality of cyclone through holes for forming a circumferential flow of air flow around the horn body, the cyclone through holes are communicated with the cavity between the vibration isolation layer and the horn body, the cyclone through holes sequentially include a vertical section, a bending section and an inclined section from the small section of the horn body to the large section, and the hole center axis of the inclined section is inclined at a preset angle with the surface of the flange plate.

[0009] The inclined sections of the cyclone through holes are all directed to the same circular ring rotation direction, and the compressed air is discharged to the intermediate wide and outlet narrow cavity formed between the vibration isolation layer and the horn body.

[0010] The beneficial effects of the present scheme are:

[0011] A plurality of cyclone through holes are arranged on the flange plate fixedly installed with the horn body, and the cyclone through holes are provided in multiple sections, so that the compressed air can be guided in a long path under the limited thickness of the flange plate, and the compressed air can be accurately guided by each hole to form a circumferential flow of air flow, so that the multiple holes form a spiral air flow, improve the soot blowing efficiency, and avoid the abnormal sound caused by the internal soot agglomeration of the acoustic soot blower, thereby causing waste of sound energy.

[0012] Further, the diameter of the cyclone through hole is 25mm, and the preset angle is 20°-25°.

[0013] The beneficial effects are that the size of the cyclone through hole can form an elliptical opening on the opening side of the flange plate towards the horn body, increase the area of the air outlet, and increase the purging range.

[0014] Further, the cyclone through hole is provided with four cyclone through holes, and the cyclone through holes are located at the intersection points of the cross line and the circle.

[0015] The beneficial effects are that the number and corresponding position of the cyclone through hole are set, and the elliptical opening formed on the opening side of the flange plate towards the horn body, so that the purging area of each hole corresponds to 1 / 4 of the cavity area, forming a complete purging area and improving the purging effect.

[0016] Further, the center point of the bending section is located at the center of the flange plate, and the bending surface of the bending section is an arc surface.

[0017] The beneficial effects are that the position and arc bending surface of the bending section can provide a wind receiving surface for guiding the compressed air in multiple directions at a suitable position, preventing the compressed air from repeatedly colliding with the opposite side wall in the cyclone tube to cause uncertain discharge direction.

[0018] Further, the cyclone through hole is connected with an air source assembly away from the opening side of the horn body, the air source assembly comprises a compressed air source and an air duct for conveying compressed air, the air duct is provided with an electromagnetic valve near the compressed air source, and the air duct is connected into the vertical section of the cyclone through hole.

[0019] The beneficial effect is that the setting of the air source assembly can provide a stable source of compressed air.

[0020] Further, the vibrator is fixed on the side wall of the shell side of the vibration isolation layer, a plurality of vibrators are arranged, and the vibrators are uniformly distributed on the same circular ring.

[0021] The beneficial effect is that the vibrators on the vibration isolation layer can uniformly provide vibration force at the vibration isolation layer, and reduce the adhesion of dust or particulate matter around the vibration isolation layer.

[0022] The second object of the present application is to provide a use method of the cyclone type soot blower to solve the problem that the existing acoustic soot blower is easy to accumulate dust outside the horn body, which affects the soot blowing efficiency.

[0023] A use method of the cyclone type soot blower comprises the following contents:

[0024] By controlling the opening of the electromagnetic valve on the compressed air source, a plurality of cyclone through holes fixed on the horn body and fixedly connected with the flange plate of the shell and the vibration isolation layer are introduced into the compressed air with a preset pressure range between the vibration isolation layer and the horn body.

[0025] The imported compressed air forms a circumferential flow after passing through the cyclone through hole, which is used for blowing away the dust on the outside of the horn body.

[0026] The beneficial effect of the present scheme is:

[0027] The cyclone through hole on the flange plate forms a circumferential flow of the imported compressed air, a plurality of cyclone through holes can jointly form a spiral blowing direction, which can completely cover the outside of the horn body, improve the soot blowing efficiency of the space outside the horn body, avoid the abnormal sound caused by the internal dust accumulation and clogging of the acoustic soot blower, cause the waste of sound energy, solve the problem of low boiler efficiency and high exhaust gas temperature caused by serious dust accumulation on the boiler heat exchange area.

[0028] Further, the compressed air is introduced through the vertical section of the cyclone through hole, guided through the bending section, and then introduced at a preset angle from the inclined section to the open space between the horn body and the vibration isolation layer to form a circumferential flow, and the preset angle is the included angle between the hole center axis of the inclined section and the flange plate surface.

[0029] The beneficial effect is that the guidance of the cyclone through hole to the airflow can form a spiral flow direction of the compressed air introduced from multiple cyclone through holes, improve the integrity of the compressed air coverage sweeping area, and does not need to strictly limit the initial introduction direction and angle of the compressed air source. The cyclone through hole on the flange plate is fixed in position and hole direction, and is not easily disturbed, so that a stable spiral airflow can be formed for sweeping.

[0030] Further, when the electromagnetic valve is controlled to open and introduce compressed air, the frequency of introducing compressed air in the set time interval is performed, the accumulated dust accumulation condition is judged according to the high-frequency sharp sound, and the sweeping frequency of compressed air is increased in the form of shortening the equal interval time and increasing the set time.

[0031] The beneficial effect is that by setting the sweeping frequency and increasing the sweeping frequency according to the operation of the unit, the accumulated dust can be accurately blown off according to the actual accumulated dust condition of the unit, the suspended particulate matter that can cause influence is reduced, and the influence caused by the suspended particles entering the cavity between the vibration isolation layer and the horn body is avoided.

[0032] Further, during the introduction of compressed air, the vibrator on the vibration isolation layer is controlled to vibrate at a preset vibration frequency, and the vibration frequency is changed according to the change of the sweeping frequency by a set step.

[0033] The beneficial effect is that the vibration isolation layer is vibrated, which can reduce the amount of adhesion on the vibration isolation layer and the surrounding parts during the blowing process. After the sweeping frequency changes, the vibration frequency is changed synchronously, so that the adhered dust or particles are vibrated as much as possible, and the sweeping effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a longitudinal section view of the cyclone through hole in the first embodiment of the cyclone blowing device of the application.

[0035] Figure 2 It is a size marking diagram of the cyclone through hole. Figure 1

[0036] Figure 3 It is a perspective view of the first embodiment of the cyclone blowing device of the application.

[0037] Figure 4 It is a hole shape schematic diagram of the cyclone through hole on the flange plate facing the opening side of the horn body. Figure 3

[0038] Figure 5 It is a fluid simulation diagram of the cyclone through hole of the first embodiment of the cyclone blowing device of the application after the compressed air is introduced. DETAILED DESCRIPTION​​

[0039] Further details are described below through specific embodiments.

[0040] The reference signs in the attached drawings of the specification include: flange plate 1, vertical section 2, bending section 3, inclined section 4, shell 5, vibration isolation layer 6, horn body 7, vibrator 8, air duct 9, cyclone through hole 10, steam-water separator 11.

[0041] Example one

[0042] The cyclone type soot blower is an equipment located in the SCR denitration catalytic reaction chamber as a whole, as shown in Figure 1 and Figure 3 : including the horn body 7, the flange plate 1 is welded on the horn body 7, the shell 5 is welded on the flange plate 1 towards the opening side of the horn body 7, the shell 5 is in a cylindrical shape, in order to show more structure, Figure 3 in the shell 5 is only half drawn, the shell 5 is sleeved outside the horn body 7, the end edge of the shell 5 is close to the opening of the large end of the horn body 7, reducing the gap between the shell 5 and the horn body 7.

[0043] The vibration isolation layer 6 is installed between the shell 5 and the horn body 7, the vibration isolation layer 6 is in a straight cylindrical horn shape and the outer side of the vibration isolation layer 6 is protruded in a circular arc shape, the end of the vibration isolation layer 6 is located at the quarter position away from the opening side end of the shell 5 close to the horn body 7, so that the cyclone through holes 10 are all towards the same circular ring rotation direction, the compressed air is guided to the cavity formed between the horn body 7 and the vibration isolation layer 6 which is wide at the middle and narrow at the outlet, so that the compressed air guided into the cavity from the cyclone through holes 10 can first gather a certain amount, and then blow out from the relatively narrow outlet for soot blowing, improving the force and distance of soot blowing. The small end of the vibration isolation layer 6 is fixed on the flange plate 1 by bolts and nuts, the large end of the vibration isolation layer 6 is fixed with the edge of the shell 5 by screws and nuts, and a sealed space is formed.

[0044] The flange plate 1 is provided with a plurality of cyclone through holes 10 for forming a surrounding flow direction of the air flow around the horn body 7, the cyclone through holes 10 are connected between the vibration isolation layer 6 and the open cavity of the horn body 7, the cyclone through holes 10 include the vertical section 2, the bending section 3 and the inclined section 4 in turn from the small section of the horn body 7 towards the large section, the center point of the bending section 3 is located at the center of the flange plate 1, the bending surface of the bending section 3 is an arc surface, the hole center axis of the inclined section 4 is inclined at a preset angle with the surface of the flange plate 1, and the inclined section 4 forms an oval hole on the surface of the flange plate 1 towards the opening side of the horn body 7; as shown in Figure 2 , the diameter of the cyclone through hole 10 is 25mm, the preset angle is 22°, and the inclined sections 4 of the cyclone through holes 10 are all inclined towards the same circumferential rotation direction; as shown in Figure 4 , four cyclone through holes 10 are provided, the cyclone through holes 10 are located at the intersection points of the cross line and the circle, in order to simplify Figure 3The display, Figure 3 Only two cyclone holes 10 are drawn for illustration.

[0045] The cyclone holes 10 are connected with an air source assembly away from the opening side of the horn body 7, the air source assembly includes a compressed air source and an air pipe 9 for conveying compressed air, the compressed air source is provided by an air storage tank, and the air is dried by a steam-water separator and then introduced into the cyclone hole 10 through the air pipe 9. In order to simplify Figure 3 It is shown that only two air pipes 9 are drawn, and an electromagnetic valve is installed near the compressed air source of the air pipe 9, and the air pipe 9 is connected to the vertical section 2 of the cyclone hole 10.

[0046] Four cyclone holes 10 are provided, compared with other numbers such as six, combined with the structure of the cyclone hole 10 and the setting of the bending section 3 and the inclined section 4 in the structure, the blowing area of each hole corresponds to 1 / 4 of the cavity area, forming a complete blowing area, and improving the blowing effect of the horn body 7. After 0.5Mpa compressed air is introduced from the cyclone hole 10, the fluid simulation diagram in the cavity between the horn body 7 and the vibration isolation layer 6 is as shown in Figure 5 As can be seen from the figure, the design of the number and structure of the cyclone hole 10 provided in the embodiment can have a very complete coverage range.

[0047] The vibrator 8 is welded on the side wall of the vibration isolation layer 6 towards the shell 5, the vibrator 8 can use the existing parameter 28KHz, 100W vibration vibrator product, the vibrator 8 is provided in multiple, three vibrators 8 are provided in the embodiment, and the vibrators 8 are uniformly distributed on the same circular ring.

[0048] The ash blower of the embodiment one blows dust through the cyclone hole 10 on the flange plate 1, the bending section 3 in the cyclone hole 10 preliminarily guides the introduced compressed air, and the inclined section 4 guides the compressed air at a certain angle, and the cyclone hole 10 forms a circular flow around the horn body 7 at each hole, the design of the cyclone hole 10 can extend the guiding path of the compressed air under the condition of the limited thickness of the flange plate 1, and the compressed air is accurately guided by each hole to form a circular airflow, so that multiple holes form a spiral airflow, improve the ash blowing efficiency, avoid the abnormal sound caused by the ash blockage in the sound wave ash blower, and cause the waste of sound energy.

[0049] Compared with the existing design of adding a glass wool heat insulation layer to solve the blockage, the overall structure of the embodiment is simple, the blockage problem is solved, the improvement cost is low, harmful gases are not emitted, and the high temperature resistance is good.

[0050] Embodiment two

[0051] Based on the structure of the ash blower of the embodiment one, the embodiment two provides a use method of the cyclone ash blower, including the following contents:

[0052] The vibration isolation layer 6 is fixedly connected between the shell 5 of the soot blower and the horn body 7, the edge of the shell 5 is fixed with the edge of the vibration isolation layer 6 to form a closed space, and the cyclone through hole 10 is formed between the vibration isolation layer 6 and the horn body 7 by being arranged on the flange plate 1 fixed to the horn body 7 and fixedly connected with the shell 5 and the vibration isolation layer 6.

[0053] The electromagnetic valve on the compressed air source is controlled to open, and the compressed air in a preset pressure range is introduced into the cyclone through hole 10 on the flange plate 1 fixed to the horn body 7 and fixedly connected with the shell 5 and the vibration isolation layer 6, and the preset range is 0.3-0.5 MPa.

[0054] The introduced compressed air forms a circumferential flow around the horn body 7 after passing through the cyclone through hole 10, which is used to blow away the soot on the outside of the horn body 7.

[0055] After the compressed air is introduced through the vertical section 2 of the cyclone through hole 10, it is guided through the bending section 3 and then introduced at a preset angle from the inclined section 4 to the open space between the horn body 7 and the vibration isolation layer 6 to form a circumferential flow, and the preset angle is the included angle between the hole center axis of the inclined section 4 and the surface of the flange plate 1, and the preset angle is 20°-25°, and the present application is optimally set at a preset angle of 22°, so that the inclined section 4 introduces the compressed air to the wide development space cavity formed between the horn body 7 and the vibration isolation layer 6, so that the compressed air can be preliminarily accumulated in the open space between the horn body 7 and the vibration isolation layer 6 and then sprayed out from the narrow outlet, thereby improving the blowing power and distance.

[0056] When the electromagnetic valve is controlled to open to introduce the compressed air, the frequency of introducing the compressed air in the set time interval is performed according to the equal interval time, the equal interval time is 2 minutes, and the set time is 1 minute; according to the high-frequency sharp sound, the accumulated soot is judged, when the high-frequency sharp sound reaches a certain threshold or frequency, it is judged that the accumulated soot is serious, so as to shorten the equal interval time and increase the set time to increase the blowing frequency of the compressed air, and the equal interval time and the set time are shortened and increased by one-half.

[0057] During the introduction of the compressed air, the vibrator 8 on the vibration isolation layer 6 is controlled to vibrate at a preset vibration frequency, and the preset vibration frequency can be set to 10V, and the vibration frequency is changed according to the set step according to the change of the blowing frequency, and the preset step can be set to 20Hz, and the vibration frequency increases when the blowing frequency increases, and the vibration frequency decreases when the blowing frequency decreases.

[0058] The embodiment introduces compressed air through the cyclone through holes 10 on the flange plate 1 to blow dust in the space between the horn body 7 and the vibration isolation layer 6. Compared with the existing glass wool heat insulation layer and the anti-blocking valve design, the simple structure improvement combined with the cyclone through holes 10 and the control of the blowing frequency can change the airflow field by a small amount to diversify the airflow changes while forming a spiral flow direction. The fixed mode spiral airflow for a long time can prevent dust or particles from accumulating in the dead angle to completely cover the blowing airflow outside the horn body 7, improve the dust blowing efficiency of the space outside the horn body 7, avoid the abnormal sound caused by the internal dust accumulation and clumping of the acoustic dust blower, and cause the waste of sound energy.

[0059] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A cyclone type soot blower comprising a horn body, a flange plate fixed on the horn body, a shell fixed on the flange plate towards the opening side of the horn body, the shell covering the outside of the horn body; a vibration barrier fixed between the shell and the horn body, the vibration barrier being fixed with the edge of the shell and forming a closed space; a plurality of cyclone through holes are formed on the flange plate, the cyclone through holes being connected with the cavity between the vibration barrier and the horn body, the cyclone through holes comprising a vertical section, a bending section and an inclined section from the small section of the horn body to the large section, the hole center axis of the inclined section being inclined at a preset angle with the surface of the flange plate; the inclined sections of the cyclone through holes are all directed towards the same circular ring, and the compressed air is guided out of the wide middle and narrow outlet cavity between the vibration barrier and the horn body. characterized in that The diameter of the cyclone through hole is 25 mm, and the preset angle is 20°-25°. The cyclone through hole is provided with four cyclone through holes, and the cyclone through holes are located at the intersection of the cross line and the circle. The center point of the bending section is located at the center of the flange plate, and the bending surface of the bending section is an arc surface.

2. A cyclone-type sootblower according to claim 1, characterized in that: The cyclone through hole is connected with an air source assembly away from the opening side of the horn body, the air source assembly comprises a compressed air source and an air duct for conveying compressed air, the air duct is provided with a solenoid valve near the compressed air source, and the air duct is connected into the vertical section of the cyclone through hole.

3. A cyclone-type sootblower according to claim 2, characterized in that: A vibrator is fixed on the side wall of the vibration barrier towards the shell side, a plurality of vibrators are provided, and the vibrators are uniformly distributed on the same circular ring.

4. A cyclone-type sootblower according to claim 3, characterized in that: The following contents are included:

5. A cyclone-type sootblower according to claim 1, characterized in that: By controlling the opening of the solenoid valve on the compressed air source, the compressed air with a preset pressure range is introduced into the vibration barrier and the horn body through the plurality of cyclone through holes, so that the introduced compressed air forms a circumferential flow after passing through the cyclone through hole, which is used to blow away the soot on the outside of the horn body.

6. A cyclone-type sootblower according to claim 1, characterized in that: After the compressed air is introduced through the vertical section of the cyclone through hole, it is guided through the bending section and then introduced at a preset angle from the inclined section to the open space between the horn body and the vibration barrier to form a circumferential flow, and the preset angle is the included angle between the hole center axis of the inclined section and the surface of the flange plate.

7. The method of using a cyclone sootblower as claimed in any one of claims 1 to 6, wherein, When the solenoid valve is controlled to open and introduce compressed air, the compressed air is introduced according to the frequency of equal interval time within the set time, the soot accumulation condition is judged according to the high frequency sharp sound, and the blowing frequency of the compressed air is increased by shortening the equal interval time and increasing the set time. During the introduction of compressed air, the vibrator on the vibration barrier is controlled to vibrate at a preset vibration frequency, and the vibration frequency is changed according to a set step according to the change of the blowing frequency.

8. The method of using a whirlaway sootblower of claim 7, wherein: ​ 9. The method of using a whirlaway sootblower of claim 7, wherein: ​ 10. The method of using a whirlaway sootblower of claim 7, wherein: ​

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