Flue gas flow adjusting device of waste heat boiler

Abstract

The utility model provides a waste heat boiler flue gas flow adjusting device which comprises a flue gas inlet pipe box and a pipe box end socket, the pipe box end socket is fixedly arranged based on one end of the flue gas inlet pipe box, a plurality of heat exchange pipes and a flow guide pipe are fixedly arranged in the flue gas inlet pipe box, and the heat exchange pipes are fixedly arranged around the flow guide pipe. An adjusting assembly is further movably fixed in the flue gas inlet pipe box and comprises a rod body and a plug fixed to the end of the rod body, the plug faces the end of the flow guide pipe, and the rod body is controlled by an adjusting valve assembly fixed to the pipe box end socket to reciprocate in the axial direction of the flow guide pipe. The flow guide pipe is arranged in the center of the heat exchange pipe plate, the heat exchange pipes are distributed on the periphery of the heat exchange pipe plate, the plug is arranged at the outlet of the flow guide pipe, and the plug is used for adjusting the distance between the plug and the outlet of the flow guide pipe through the adjusting assembly and used for adjusting whether high-temperature flue gas enters the flow guide pipe or not and adjusting the flue gas flow of the high-temperature flue gas entering the flow guide pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, in particular to a flue gas flow regulating device for a waste heat boiler. Background Art

[0002] As a device for recovering heat from high-temperature gas, waste heat boilers are widely used in chemical, building materials, metallurgy, coking and other industries. It uses high-temperature exhaust gas to heat water, recovers heat, and achieves the purpose of reducing energy consumption. The connection structure between the heat exchange tube head and the tube sheet includes a heat exchange tube head and a tube sheet. Heat exchange tube holes are opened on the tube sheet. The heat exchange tube holes are cylindrical. For easy installation, the diameter of the heat exchange tube holes is usually larger than the diameter of the heat exchange tube head. After the heat exchange tube head passes through the heat exchange tube hole, its end is welded to the tube sheet, so that a circle of gap will be formed between the tube sheet and the heat exchange tube head (the place not welded).

[0003] Heat exchange tubes are provided in the waste heat boiler. When the flue gas is in normal condition, the guide tube does not pass the flue gas, and the flue gas flows through the heat exchange tubes. When the flue gas is in abnormal condition, the guide tube obviously cannot meet the requirements of flue gas circulation, so that the high-temperature flue gas accumulates in the evaporator heat exchange tube area, the high-temperature flue gas cannot flow normally, and the heat is accumulated in the waste heat boiler, thereby affecting the heat recovery process in the waste heat boiler. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes a flue gas flow regulating device for a waste heat boiler, which is used to use a guide pipe to guide the high-temperature flue gas in the waste heat boiler when the flue gas is in an abnormal condition, so as to ensure the normal operation of the waste heat boiler.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a waste heat boiler flue gas flow regulating device, comprising a flue gas inlet pipe box and a pipe box head, the pipe box head is fixedly arranged based on one end of the flue gas inlet pipe box, a plurality of heat exchange pipes and a flow guide pipe are fixedly arranged in the flue gas inlet pipe box, and the plurality of heat exchange pipes are fixedly arranged around the flow guide pipe;

[0006] An adjusting component is also movably fixed in the flue gas inlet pipe box, and the adjusting component includes a rod body and a plug fixed to the end of the rod body. The plug is arranged facing the end of the guide pipe, and the rod body is regulated by a regulating valve assembly fixed on the pipe box head to adjust its axial reciprocating movement along the guide pipe.

[0007] Furthermore, the regulating valve assembly includes a pneumatic assembly and an actuator assembly, one end of the actuator assembly is connected to the pneumatic assembly, and the other end is fixedly connected to the rod body.

[0008] Furthermore, the regulating valve assembly is fixed to the pipe box plug by a fixed assembly, and a shaft sealing assembly is fixedly arranged through the pipe box plug, one end of the shaft sealing assembly is located inside the pipe box plug, and the other end is located between the pipe box plug and the fixed assembly, and the rod body passes through the length direction of the shaft sealing assembly and can reciprocate along the length direction of the shaft sealing assembly.

[0009] Furthermore, the plug is of a conical structure, and an inclined groove is provided at one end of the flow guide tube facing the plug, and the inclination angle of the inclined groove is greater than the taper of the plug.

[0010] Furthermore, a heat exchange tube sheet is fixedly arranged in the flue gas inlet tube box, and a plurality of the heat exchange tubes and the guide tubes are vertically fixed on the heat exchange tube sheet.

[0011] Furthermore, the shaft sealing assembly includes a tube body, which is sleeved in a first sealing tube. The first sealing tube passes through the tube box head and is fixed on the tube box head. At least one second sealing tube is fixedly arranged inside the tube body, and the rod body reciprocates in the tube body or the second sealing tube.

[0012] Furthermore, a limit assembly is also provided in the adjusting assembly, and the limit assembly is provided between the executing assembly and the rod body, and the executing assembly and the rod body are both fixedly connected to the limit assembly.

[0013] Compared with the prior art, the beneficial effects of the utility model include: a guide tube is arranged in the center of the heat exchange tube plate, heat exchange tubes are arranged around it, and a plug is arranged at the outlet of the guide tube. The plug is used to adjust the distance between the plug and the outlet of the guide tube by an adjusting component, so as to adjust whether the high-temperature flue gas enters the guide tube and the flue gas flow rate of the high-temperature flue gas entering the guide tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0015] Figure 1 The cross-sectional structure of the waste heat boiler flue gas flow regulating device is schematically shown;

[0016] Figure 2 The schematic diagram shows the partial enlarged structure of the end of the guide tube and the plug;

[0017] Figure 3 The schematic diagram shows the enlarged partial structure of the shaft seal assembly.

[0018] Numbers in the figure: 1- flue gas inlet pipe box, 2- pipe box head, 3- heat exchange tube, 4- guide tube, 5- rod body, 6- plug, 7- pneumatic component, 8- actuator assembly, 9- shaft sealing assembly, 91- first sealing tube, 92- tube body, 93- second sealing tube, 10- heat exchange tube sheet, 11- limit assembly. DETAILED DESCRIPTION

[0019] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0020] Figure 1 The schematic diagram shows the cross-sectional structure of the waste heat boiler flue gas flow control device. Figure 1 As shown, a waste heat boiler flue gas flow regulating device includes a flue gas inlet pipe box 1 and a pipe box head 2. The pipe box head 2 is fixedly arranged based on one end of the flue gas inlet pipe box 1. A plurality of heat exchange tubes 3 and a flow guide tube 4 are fixedly arranged in the flue gas inlet pipe box 1. The plurality of heat exchange tubes 3 are fixedly arranged around the flow guide tube 4, that is, the aforementioned flow guide tube 4 is fixedly arranged at the center position of the arrangement area of ​​the plurality of heat exchange tubes 3. In some embodiments, the heat exchange tubes 3 arranged at the periphery can be arranged in a circular form, and then the flow guide tube 4 is fixedly arranged at the center position of the aforementioned circle. In order to facilitate the fixation of the aforementioned heat exchange tubes 3 and guide tubes 4, a heat exchange tube sheet 10 can be fixedly arranged in the flue gas inlet tube box 1. The heat exchange tube sheet 10 is fixedly arranged along the radial direction of the flue gas inlet tube box 1. The aforementioned heat exchange tubes 3 and guide tubes 4 are vertically fixed on the heat exchange tube sheet 10. In this way, the aforementioned heat exchange tubes 3 and guide tubes 4 can be kept parallel to the flue gas inlet tube box 1.

[0021] An adjusting assembly is also movably fixed in the aforementioned flue gas inlet pipe box 1, and the adjusting assembly includes a rod body 5 and a plug 6 fixed to the end of the rod body 5, and the plug 6 is arranged facing the end of the guide pipe 4, and the rod body 5 is regulated by the adjusting valve assembly fixed on the pipe box head 2 to reciprocate along the axial direction of the guide pipe 4. The aforementioned adjusting valve assembly includes a pneumatic assembly 7 and an actuator assembly 8, one end of the actuator assembly 8 is connected to the pneumatic assembly 7, and the other end is fixedly connected to the rod body 5; the aforementioned pneumatic assembly 7 cooperates with the actuator assembly 8 to drive the aforementioned rod body 5 and the plug 6 located on the end of the rod body 5 to approach or move away from the end of the guide pipe 4, thereby determining whether to allow high-temperature flue gas to enter the guide pipe 4 and the flow rate of the flue gas entering the guide pipe 4.

[0022] It is worth mentioning that Figure 2The schematic diagram shows the partial enlarged structure of the end of the guide tube and the plug, such as Figure 2 As shown, the aforementioned plug 6 is a conical structure, and an inclined groove is provided on the inner wall of the guide tube 4 facing one end of the plug 6. The aforementioned inclined groove and the plug 6 have the same inclination direction and the inclination angle of the inclined groove is greater than the taper of the plug 6, so that the plug 6 can be embedded in the guide tube 4, and by virtue of the difference between the inclination angle of the inclined groove and the taper of the plug 6, the plug 6 is assisted to enter the guide tube 4, and can cooperate with the plug 6 to assist in the closure of the guide tube 4.

[0023] The aforementioned regulating valve assembly is fixed on the pipe box plug 6 by a fixed assembly, and a shaft sealing assembly 9 is fixedly arranged through the pipe box plug 6. One end of the shaft sealing assembly 9 is located inside the pipe box plug 6, and the other end is located between the pipe box plug 6 and the fixed assembly. The rod body 5 passes through the length direction of the shaft sealing assembly 9 and can reciprocate along the length direction of the shaft sealing assembly 9. Figure 3 The schematic diagram shows the enlarged structure of the shaft seal assembly. Figure 3 As shown, the aforementioned shaft sealing assembly 9 includes a tube body 92, and the tube body 92 is sleeved in a first sealing tube 91. The first sealing tube 91 passes through the pipe box head 2 and is fixed on the pipe box head 2. At least one second sealing tube 93 is fixedly arranged in the aforementioned tube body 92, and the rod body 5 reciprocates in the tube body 92 or the second sealing tube 93; the tight contact between the aforementioned first sealing tube 91 and the tube body 92 is used to ensure the sealing in the flue gas inlet pipe box 1, and the second sealing tube 93 fixedly arranged in the tube body 92 is in tight contact with the outer wall of the rod body 5, thereby ensuring the sealing between the aforementioned tube body 92 and the rod body 5.

[0024] A limit assembly 11 is also provided in the aforementioned adjustment assembly. The limit assembly 11 is provided between the actuator 8 and the rod body 5, and the actuator 8 and the rod body 5 are both fixedly connected to the limit assembly 11. The limit assembly 11 is described in detail below. The limit assembly 11 is used to connect the actuator 8 and the rod body 5 with a plug 6 fixed at the end, and the actuator 8 can be a connecting rod, and the connecting rod connected thereto is driven to reciprocate by the pneumatic assembly 7. In some embodiments, the pneumatic assembly 7 is fixed to the fixed assembly through a plurality of long rods, the actuator 8 is connected to the pneumatic assembly 7 and is provided between the aforementioned plurality of long rods, and a block or other component for blocking is provided on the long rod. The limit assembly 11 is fixed based on the aforementioned long rod movement, and the limit of the stroke of the actuator 8 is completed by the block provided on the long rod. In other embodiments, the aforementioned long rod is also provided, and the limit assembly 11 is also movably fixed on the aforementioned long rod. The difference is that a plurality of gears are coaxially arranged inside the limit assembly 11, and the number of teeth on each gear is different, but the gap between each tooth on each gear is consistent, that is, each gear can rotate at a different angle, and a tooth groove that can mesh with the aforementioned gear is provided on the actuator 8, and a turntable screw is provided on the limit assembly 11, so as to facilitate manual adjustment of the position of the limit assembly 11 relative to the actuator 8, thereby adjusting the length that the actuator 8 can move, thereby completing the limit.

[0025] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A waste heat boiler flue gas flow regulating device, characterized in that: It comprises a flue gas inlet pipe box (1) and a pipe box sealing head (2), wherein the pipe box sealing head (2) is fixedly arranged based on one end of the flue gas inlet pipe box (1), a plurality of heat exchange pipes (3) and a flow guide pipe (4) are fixedly arranged in the flue gas inlet pipe box (1), and the plurality of heat exchange pipes (3) are fixedly arranged around the flow guide pipe (4); An adjusting component is also movably fixed in the flue gas inlet pipe box (1), the adjusting component comprising a rod body (5) and a plug (6) fixed to the end of the rod body (5), the plug (6) being arranged facing the end of the flow guide pipe (4), and the rod body (5) is regulated to move back and forth along the axial direction of the flow guide pipe (4) by a regulating valve component fixed to the pipe box sealing head (2).

2. The waste heat boiler flue gas flow regulating device according to claim 1, characterized in that: The regulating valve assembly comprises a pneumatic assembly (7) and an actuator assembly (8); one end of the actuator assembly (8) is connected to the pneumatic assembly (7), and the other end is fixedly connected to the rod body (5).

3. The waste heat boiler flue gas flow regulating device according to claim 2, characterized in that: The regulating valve assembly is fixed to the pipe box plug (6) by a fixing assembly, and a shaft sealing assembly (9) is fixedly arranged through the pipe box plug (2), one end of the shaft sealing assembly (9) is located inside the pipe box plug (6), and the other end is located between the pipe box plug (6) and the fixing assembly, and the rod body (5) passes through the length direction of the shaft sealing assembly (9) and can reciprocate along the length direction of the shaft sealing assembly (9).

4. The waste heat boiler flue gas flow regulating device according to claim 1, characterized in that: The plug (6) is of a conical structure, and the guide tube (4) is provided with an inclined groove at one end facing the plug (6), wherein the inclination angle of the inclined groove is greater than the taper of the plug (6).

5. The waste heat boiler flue gas flow regulating device according to claim 1, characterized in that: A heat exchange tube sheet (10) is fixedly arranged in the flue gas inlet tube box (1), and a plurality of the heat exchange tubes (3) and the flow guide tubes (4) are vertically fixed on the heat exchange tube sheet (10).

6. The waste heat boiler flue gas flow regulating device according to claim 3, characterized in that: The shaft sealing assembly (9) comprises a tube body (92), wherein the tube body (92) is sleeved in a first sealing tube (91), wherein the first sealing tube (91) passes through the tube box seal head (2) and is fixed on the tube box seal head (2), and at least one second sealing tube (93) is fixedly arranged in the tube body (92), and the rod body (5) reciprocates in the tube body (92) or the second sealing tube (93).

7. The waste heat boiler flue gas flow regulating device according to claim 3, characterized in that: A limit assembly (11) is also provided in the adjustment assembly. The limit assembly (11) is provided between the actuator assembly (8) and the rod body (5). Both the actuator assembly (8) and the rod body (5) are fixedly connected to the limit assembly (11).

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