Ash removal device and converter waste heat boiler

Abstract

The utility model relates to the technical field of deashing devices, and provides a deashing device and a converter waste heat boiler, the deashing device comprises a rheological pipe and a gas supply device, the first end of the rheological pipe is open, the second end of the rheological pipe is closed, the side wall of the rheological pipe is provided with at least two groups of through holes, the through holes are distributed at intervals along the circumferential direction of the rheological pipe, and the gas supply device is connected with the gas supply device. The through holes in each group are distributed at intervals along the axis direction of the rheological pipe; the output end of the air supply device is connected with the first end of the rheological pipe, and the air supply device supplies air into the rheological pipe so that shock waves can be generated in the rheological pipe. By means of the arrangement, gas can be blown at all positions in the axis direction of the rheological pipe and all direction angles in the circumferential direction of the rheological pipe, the gas forms high-speed gas flow after passing through the through holes in the rheological pipe, a wind tunnel is formed in a limited space of a to-be-dedusted area, and a shock wave string is generated; the high-energy self-excitation oscillation characteristic of a shock wave string generated in a wind tunnel and shearing force generated by shock waves in different shapes are utilized to destroy the adhesion stress of the dust, and the dust on the surface of a to-be-dedusted area is effectively cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of dust cleaning devices, in particular to a dust cleaning device and a converter waste heat boiler. Background Art

[0002] A converter waste heat boiler is a device that utilizes the high-temperature and high-pressure heat energy in the waste gas generated by a converter and converts it into steam or hot water through a heat exchanger. The waste gas is a flue gas entrained with a large amount of dust, which is likely to cause dust accumulation on the surface of the heat exchanger. As the amount of dust accumulation on the surface of the heat exchanger increases, the flow resistance of the flue gas in the converter waste heat boiler increases, and the exhaust gas temperature rises, seriously affecting the normal operation of the converter waste heat boiler. It is necessary to clean the dust accumulated on the heat exchanger.

[0003] In some technologies, a blowing pipe is used to blow and clean the dust accumulated on the heat exchanger. However, the blowing end of the blowing pipe in the prior art is trumpet-shaped and can only blow in a conical space. The spatial area that can be blown is limited. For large equipment, it is impossible to blow to the center of the equipment, and the blowing effect is not ideal, and the dust cannot be effectively cleaned.

[0004] Therefore, how to solve the problem that the dust on the heat exchanger of the converter waste heat boiler in the prior art is not easy to clean has become an important technical problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The utility model provides a dust cleaning device and a converter waste heat boiler to solve the defect that the dust on the heat exchanger of the converter waste heat boiler in the prior art is not easy to clean.

[0006] The utility model provides a dust cleaning device, including:

[0007] A rheological tube, which is suitable for being arranged around the area to be dust-cleaned. The first end of the rheological tube is open, the second end of the rheological tube is closed, and at least two groups of through holes are arranged on the side wall of the rheological tube. Each group of the through holes is circumferentially spaced along the rheological tube, and each through hole in each group is axially spaced along the axis of the rheological tube;

[0008] A gas supply device, the output end of the gas supply device is connected to the first end of the rheological tube, and the gas supply device is suitable for supplying gas into the rheological tube to generate a shock wave in the rheological tube.

[0009] According to a dust cleaning device provided by the utility model, along the axis direction of the rheological tube, the projection area of the second end of the rheological tube is located within the projection area of the first end of the rheological tube.

[0010] According to a dust cleaning device provided by the present utility model, the rheological tube includes at least two sections of tube bodies, and each section of the tube bodies is coaxially arranged and fixedly connected together, and each section of the tube bodies is communicated with each other;

[0011] The cross-section of the tube body is circular, and among two adjacent sections of the tube bodies, the diameter of the one closer to the air supply device is larger than that of the other.

[0012] According to a dust cleaning device provided by the present utility model, the cross-section shape of the through hole is rectangular, and the length direction of the rectangle is consistent with the axial direction of the rheological tube.

[0013] According to a dust cleaning device provided by the present utility model, among two adjacent through holes, the one closer to the first end of the rheological tube is the first one, and the other is the second one, and the length dimension of the first one along the axial direction of the rheological tube is larger than the length dimension of the second one along the axial direction of the rheological tube.

[0014] According to a dust cleaning device provided by the present utility model, the air supply device includes:

[0015] An air storage tank for storing pressurized gas, a first valve is arranged at the outlet of the air storage tank, and the first valve is used to control the opening and closing of the outlet of the air storage tank;

[0016] A generator having an air inlet and an air outlet, the air inlet is connected to the outlet of the air storage tank, the air outlet is connected to the first end of the rheological tube, and the generator is adapted to cause the gas discharged from the air storage tank to suddenly release and produce a micro-explosion effect.

[0017] According to a dust cleaning device provided by the present utility model, a control air port and a second valve are arranged on the generator, the control air port is connected to a control air source, the second valve is arranged at the control air port, and the second valve is adapted to control the opening and closing of the control air port;

[0018] A diaphragm assembly is arranged in the generator, and the diaphragm assembly is adapted to control the on-off state of the air inlet and the air outlet under the action of the control air port.

[0019] According to a dust cleaning device provided by the present utility model, a plurality of rheological tubes are arranged, the axes of each of the rheological tubes are parallel to each other, and the first ends of each of the rheological tubes are all connected to the output end of the air supply device.

[0020] The present utility model also provides a converter waste heat boiler, which includes a boiler body and the above-mentioned dust cleaning device, the rheological tubes of the dust cleaning device are arranged inside the boiler body, and the air supply device of the dust cleaning device is arranged outside the boiler body.

[0021] According to a converter waste heat boiler provided by the present utility model, a heat exchanger is arranged inside the boiler body, a rheological tube is arranged above the heat exchanger, and the axial direction of the rheological tube is consistent with the length direction of the heat exchanger.

[0022] The soot cleaning device provided by the present utility model includes a rheological tube and a gas supply device. The rheological tube is used to be arranged around the area to be soot cleaned. The first end of the rheological tube is open, and the second end of the rheological tube is closed. At least two groups of through holes are arranged on the side wall of the rheological tube, and each group of through holes is spaced along the circumferential direction of the rheological tube, and each through hole in each group is spaced along the axial direction of the rheological tube. This enables the gas to be blown in all positions in the axial direction of the rheological tube and in all angular directions in its circumferential direction, effectively expanding the range of the spatial area that can be blown. The output end of the gas supply device is connected to the first end of the rheological tube, and the gas supply device is used to supply gas into the rheological tube to generate shock waves in the rheological tube. With such an arrangement, the gas forms a high-speed air flow after passing through the through holes on the rheological tube, forms a wind tunnel in the limited space of the area to be soot cleaned, generates a shock wave train, and utilizes the high-energy self-excited oscillation characteristics of the shock wave train generated in the wind tunnel and the shear force generated by shock waves of different shapes to break the adhesion force of the ash scale, realizing the cleaning of the ash scale on the surface of the area to be soot cleaned, and solving the problem that the ash accumulation on the heat exchanger of the converter waste heat boiler in the prior art is not easy to clean.

[0023] Furthermore, in the converter waste heat boiler provided by the present utility model, since it has the above-mentioned soot cleaning device, it also has the above-mentioned various advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a structural schematic diagram of the soot cleaning device provided by the present utility model.

[0026] Figure 2 It is a structural schematic diagram of the rheological tube provided by the present utility model.

[0027] REFERENCE SIGNS:

[0028] 1, rheological tube; 2, through hole; 3, gas supply device; 4, first tube body; 5, second tube body; 6, third tube body; 7, generator; 8, second valve; 9, boiler body; 10, first connecting pipe; 11, second connecting pipe; 12, third connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0030] The following will be described in conjunction with Figures 1 to 2 the dust cleaning device of the present utility model.

[0031] As Figures 1 to 2 shown, the dust cleaning device provided by the embodiment of the present utility model includes a rheological tube 1 and a gas supply device 3.

[0032] Specifically, the rheological tube 1 is used to be arranged around the area to be dust cleaned. The first end of the rheological tube 1 is open, and the second end of the rheological tube 1 is closed.

[0033] At least two groups of through holes 2 are arranged on the side wall of the rheological tube 1. Each group of through holes 2 is distributed at intervals along the circumferential direction of the rheological tube 1, and each through hole 2 in each group is distributed at intervals along the axial direction of the rheological tube 1. This enables the gas to be blown in all positions in the axial direction of the rheological tube 1 and in all angular directions in its circumferential direction, effectively expanding the range of the spatial area that can be blown.

[0034] The output end of the gas supply device 3 is connected to the first end of the rheological tube 1. The gas supply device 3 is used to supply gas into the rheological tube 1 to generate a shock wave in the rheological tube 1.

[0035] With such an arrangement, the gas forms a high-speed air flow after passing through the through holes 2 on the rheological tube 1, forms a wind tunnel in the limited space of the area to be dust cleaned, generates a shock wave train, and utilizes the high-energy self-excited oscillation characteristics of the shock wave train generated in the wind tunnel and the shear force generated by shock waves of different shapes to destroy the adhesion force of the ash scale, realizing the cleaning of the ash scale on the surface of the area to be dust cleaned, and solving the problem that the ash accumulation on the heat exchanger of the converter waste heat boiler in the prior art is not easy to clean.

[0036] In this embodiment, a plurality of rheological tubes 1 are provided. The axes of the respective rheological tubes 1 are parallel to each other, and the first ends of the respective rheological tubes 1 are all connected to the output end of the gas supply device 3. Using a plurality of rheological tubes 1 to blow the area to be dust cleaned can improve the cleaning effect. Moreover, using the same gas supply device 3 to supply gas to a plurality of rheological tubes 1 has a simple structure and low cost.

[0037] In the embodiment of the present utility model, along the axial direction of the rheological tube 1, the projection area of the second end of the rheological tube 1 is located within the projection area of the first end of the rheological tube 1. That is to say, the cross-sectional area of the first end of the rheological tube 1 is larger than the cross-sectional area of the second end of the rheological tube 1. This can ensure that the pressure at the position near the second end of the rheological tube 1 is sufficient, so that there is enough gas in the through hole 2 at the position near the second end of the rheological tube 1.

[0038] Specifically, the cross-sectional area of the rheological tube 1 can be gradually reduced or stepwise reduced along the direction from the first end to the second end.

[0039] In this embodiment, the rheological tube 1 is set in a structural form with a stepwise reduction in cross-sectional area along the direction from the first end to the second end.

[0040] Specifically, the rheological tube 1 includes at least two tube bodies. Each tube body is coaxially arranged and fixedly connected together, and each tube body is communicated with each other.

[0041] Along the gas flow direction, among two adjacent tube bodies, the one closer to the gas supply device 3 has a larger cross-sectional area than the other. Specifically, the cross-section of the tube body is circular. Among two adjacent tube bodies, the diameter of the one closer to the gas supply device 3 is larger than that of the other.

[0042] Referring to the figure, the rheological tube 1 includes three tube bodies, namely a first tube body 4, a second tube body 5, and a third tube body 6. The first tube body 4, the second tube body 5, and the third tube body 6 are coaxially arranged. The cross-sectional shapes of the first tube body 4, the second tube body 5, and the third tube body 6 are all circular. The diameter of the first tube body 4 is larger than the diameter of the second tube body 5, and the diameter of the second tube body 5 is larger than the diameter of the third tube body 6.

[0043] In the embodiment of the present utility model, the through hole 2 provided on the side wall of the rheological tube 1 is set as a rectangular hole, that is, the cross-sectional shape of the through hole 2 is rectangular, and the cross-section of the through hole 2 is perpendicular to the axis of the through hole 2. The length direction of the rectangle is consistent with the axial direction of the rheological tube 1. Setting the through hole 2 as a rectangular hole can increase the contact area between the ejected gas and the device and improve the cleaning effect.

[0044] In a further embodiment, among each group of through holes 2, among two adjacent through holes 2, the one closer to the first end of the rheological tube 1 is the first one, and the other is the second one. The length dimension of the first one along the axial direction of the rheological tube 1 is larger than the length dimension of the second one along the axial direction of the rheological tube 1, which can further ensure the pressure at the position near the second end of the rheological tube 1, so that there is enough gas in the through hole 2 at the position near the second end of the rheological tube 1.

[0045] In the embodiment of the present utility model, the gas supply device 3 includes a gas storage tank and a generator 7.

[0046] The gas storage tank is used to store pressurized gas. A first valve is provided at the outlet of the gas storage tank, and the opening and closing of the outlet of the gas storage tank can be controlled by using the first valve.

[0047] The generator 7 has an air inlet and an air outlet. The air inlet is connected to the outlet of the gas storage tank, and the air outlet is connected to the first end of the rheological tube 1. The generator 7 can supply the gas discharged from the gas storage tank to suddenly release and produce a micro-explosion effect, so that the gas can enter the rheological tube 1 at high speed.

[0048] A first connecting pipe 10 is provided between the air inlet of the generator 7 and the outlet of the gas storage tank. The first connecting pipe 10 is connected to the air inlet of the generator 7 through a flange structure.

[0049] A second connecting pipe 11 is provided between the air outlet of the generator 7 and the first end of the rheological tube 1. The second connecting pipe 11 is connected to the air outlet of the generator 7 through a flange structure.

[0050] A control air port and a second valve 8 are provided on the generator 7. The control air port is connected to a control gas source. The second valve 8 is provided at the control air port, and the second valve 8 is used to control the opening and closing of the control air port to control the flow of the gas from the control gas source to the generator 7.

[0051] A third connecting pipe 12 is provided between the control air port and the control gas source. The second valve 8 is provided on the third connecting pipe 12 by means of a threaded connection.

[0052] A diaphragm assembly is provided inside the generator 7. The diaphragm assembly is used to control the on-off state of the air inlet and the air outlet under the action of the control air port. When control gas is introduced at the control air port, the diaphragm assembly will connect the air inlet and the air outlet.

[0053] The control air port can provide gas with a pressure of 0.7 - 0.9 MPa, and the air inlet can provide gas with a pressure of approximately 0.4 MPa.

[0054] The above-mentioned generator 7 can but is not limited to select a micro gas explosion device.

[0055] The gas component in the above-mentioned gas storage tank can be nitrogen or compressed air, and the gas of the control gas source can be nitrogen or compressed air.

[0056] In a specific embodiment, the gas component in the gas storage tank is nitrogen, and the gas of the control gas source is also nitrogen. A nitrogen main pipe is provided at the production site of the converter. The control air port can be connected to the nitrogen main pipe, and the nitrogen in the nitrogen main pipe is used as the control gas source. The gas storage tank can also be connected to the nitrogen main pipe to use the nitrogen in the nitrogen main pipe to supplement the gas in the gas storage tank.

[0057] An air supplement port is provided on the gas storage tank. The air supplement port is connected to the main nitrogen pipe. A third valve is provided at the air supplement port to control the opening and closing of the air supplement port.

[0058] The above-mentioned first valve, second valve 8 and third valve can but are not limited to selecting explosion-proof solenoid valves. The dust cleaning device provided by the embodiment of the present invention further includes a control mechanism. The first valve, second valve 8 and third valve are all electrically connected to the control mechanism. The control mechanism can be used to control the opening and closing actions of the first valve, second valve 8 and third valve, and the automatic dust cleaning and air supplement of the dust cleaning device can be realized.

[0059] The dust cleaning device provided by the embodiment of the present invention operates intermittently and regularly cleans the accumulated ash. When it is necessary to clean the accumulated ash, first open the second valve 8 to supply gas to the control air port, so that the diaphragm assembly switches to a state where the air inlet is connected to the air outlet. Then open the first valve to supply gas from the gas storage tank to the generator 7. The gas in the gas storage tank suddenly releases in the generator 7, producing the effect of a micro explosion, so that the gas enters the rheological tube 1 at a high speed. The gas forms a high-speed air flow after passing through the through holes 2 on the rheological tube 1, forms a wind tunnel in the limited space of the area to be dust-cleaned, generates a shock wave train, and uses the high-energy self-excited oscillation characteristics of the shock wave train generated in the wind tunnel and the shear force generated by shock waves of different shapes to destroy the adhesion force of the ash scale, and realizes the cleaning of the ash scale on the surface of the area to be dust-cleaned.

[0060] After the gas storage tank completes the gas release, close the first valve and the second valve 8. Thereafter, the gas storage tank can be supplemented with gas for the next cleaning operation.

[0061] On the other hand, the embodiment of the present invention also provides a converter waste heat boiler, including the dust cleaning device provided in any of the above embodiments. The rheological tube 1 of the dust cleaning device is arranged inside the boiler body 9, and the gas supply device 3 of the dust cleaning device is arranged outside the boiler body 9. The dust cleaning device provided in the above embodiment can effectively clean the accumulated ash. Therefore, the converter waste heat boiler in this embodiment has the advantages of high cleanliness, high heat exchange efficiency, and convenient maintenance. The derivation process of the beneficial effects of the converter waste heat boiler in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above-mentioned dust cleaning device, so it will not be repeated here.

[0062] A heat exchanger is provided inside the boiler body 9. In this embodiment, the rheological tube 1 is arranged above the heat exchanger. The accumulated ash mainly remains on the upper surface of the heat exchanger. Arranging the rheological tube 1 above the heat exchanger can improve the cleaning effect on the accumulated ash.

[0063] In this embodiment, when arranging the rheological tube 1, the axial direction of the rheological tube 1 is consistent with the length direction of the heat exchanger, and the rheological tube 1 extends from one end to the other end in the length direction of the heat exchanger, so that each position of the heat exchanger can be cleaned, and the cleaning effect on the accumulated ash on the heat exchanger can be improved.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dust cleaning device, characterized in that: include: A rheological tube (1) is suitable for being arranged around an area to be cleaned, the first end of the rheological tube (1) is open, the second end of the rheological tube (1) is closed, at least two groups of through holes (2) are arranged on the side wall of the rheological tube (1), the through holes (2) of each group are spaced apart along the circumference of the rheological tube (1), and the through holes (2) of each group are spaced apart along the axial direction of the rheological tube (1); An air supply device (3), wherein an output end of the air supply device (3) is connected to a first end of the rheological tube (1), and the air supply device (3) is suitable for supplying air into the rheological tube (1) to generate shock waves in the rheological tube (1).

2. The dust cleaning device according to claim 1, characterized in that: Along the axial direction of the rheotube, the projection area of ​​the second end of the rheotube (1) is located within the projection area of ​​the first end of the rheotube (1).

3. The dust cleaning device according to claim 2, characterized in that: The rheological tube (1) comprises at least two sections of tube bodies, each section of the tube bodies is coaxially arranged and fixedly connected together, and each section of the tube bodies is interconnected; The cross section of the tube body is circular, and of two adjacent sections of the tube body, the diameter of the one close to the air supply device (3) is larger than the diameter of the other.

4. The dust cleaning device according to claim 1, characterized in that: The cross-sectional shape of the through hole (2) is a rectangle, and the length direction of the rectangle is consistent with the axial direction of the rheological tube (1).

5. The dust cleaning device according to claim 4, characterized in that: Of the two adjacent through holes (2), one close to the first end of the rheological tube (1) is a first one, and the other is a second one, wherein the length dimension of the first one along the axial direction of the rheological tube (1) is greater than the length dimension of the second one along the axial direction of the rheological tube (1).

6. The dust cleaning device according to claim 1, characterized in that: The air supply device (3) comprises: A gas storage tank, used to store pressurized gas, wherein a first valve is provided at the outlet of the gas storage tank, and the first valve is used to control the opening and closing of the outlet of the gas storage tank; The generator (7) has an air inlet and an air outlet, wherein the air inlet is connected to the outlet of the gas storage tank, and the air outlet is connected to the first end of the rheological tube (1), and the generator (7) is suitable for suddenly releasing the gas discharged from the gas storage tank and producing a micro-explosion effect.

7. The dust cleaning device according to claim 6, characterized in that: The generator (7) is provided with a control air port and a second valve (8), the control air port is connected to a control air source, the second valve (8) is arranged at the control air port, and the second valve (8) is suitable for controlling the opening and closing of the control air port; A diaphragm assembly is provided in the generator (7), and the diaphragm assembly is suitable for controlling the on-off state of the air inlet and the air outlet under the action of the control air port.

8. The dust cleaning device according to claim 1, characterized in that: A plurality of rheological tubes (1) are provided, the axes of the rheological tubes (1) are parallel to each other, and the first end of each rheological tube (1) is connected to the output end of the gas supply device (3).

9. A converter waste heat boiler, characterized in that: It comprises a boiler body (9) and a ash cleaning device according to any one of claims 1 to 8, wherein the rheological tube (1) of the ash cleaning device is arranged inside the boiler body (9), and the air supply device (3) of the ash cleaning device is arranged outside the boiler body (9).

10. The converter waste heat boiler according to claim 9, characterized in that: A heat exchanger is arranged inside the boiler body (9), the rheological tube (1) is arranged above the heat exchanger, and the axial direction of the rheological tube (1) is consistent with the length direction of the heat exchanger.

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