Turning plate type waste heat recovery regulator for waste heat boiler

Abstract

The utility model relates to a turning plate type waste heat recovery regulator of a waste heat boiler, which is arranged in a heat insulation layer in the waste heat boiler and is provided with a central pipe, the front end of the central pipe extends out of a waste heat boiler body and is connected with a boiler tail gas exhaust end to introduce high-temperature tail gas, and the rear end of the central pipe is axially and fixedly connected with a connecting pipe which is in flange connection with a mixing pipe. Vent holes which are evenly distributed in the circumferential direction are formed in the outer circumferential face of the mixing pipe, and cold air in the heat preservation layer is introduced into the mixing pipe through the vent holes to be mixed with high-temperature tail gas. A turning plate matched with the inclined face of the mixing pipe is hinged to the rear end face of the mixing pipe, mixed air in the mixing pipe is blocked when the turning plate is tightly attached to the inclined face of the mixing pipe, and the mixed air in the mixing pipe is released into the waste heat boiler body when the turning plate is pulled up. The turning plate matched with the slope is arranged on the end face of the mixing pipe, mixed air in the mixing pipe is released into the waste heat boiler body by pulling the turning plate, the structure is simple, parts are not prone to deformation caused by high temperature, and normal use of the regulator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to a flap type waste heat boiler waste heat recovery regulator. Background Art

[0002] A waste heat boiler is a boiler that uses high-temperature exhaust gas from the production process of an industrial boiler to produce steam. It is a high-temperature, high-pressure heat exchanger.

[0003] The existing waste heat recovery regulators generally adopt a valve core baffle structure, which has many parts and a relatively complex structure. A guide groove is processed on the conical fairing at the outlet of the valve core baffle, and a guide support plate is welded and processed on the outer circle of the valve core component. During the switching process of the valve core, the weight of the entire valve core is supported on the guide groove by the guide support plate. Due to long-term use in a high-temperature environment and the large dead weight of the valve core component, all the weight of the valve core component is supported between the guide support plate and the guide groove. During long-term use, mutual wear and deformation occur, which eventually leads to the valve getting stuck during the switching process, and the valve stem breaks, affecting the normal use of the valve. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a flap-type waste heat boiler waste heat recovery regulator which has a simple structure and can prevent parts from being deformed by high temperature and ensure the normal use of valves.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a flap-type waste heat boiler waste heat recovery regulator is arranged in the insulation layer inside the waste heat boiler, and has a central tube. The front end of the central tube extends out of the waste heat boiler body and is connected to the boiler exhaust gas discharge end to allow the high-temperature exhaust gas to pass through. The rear end of the central tube is axially fixed with a connecting pipe, and the rear end flange of the connecting pipe is connected to a mixing tube whose rear end extends out of the rear end surface of the insulation layer. The outer peripheral surface of the mixing tube located in the insulation layer is provided with circumferentially uniformly distributed air holes, and the air holes introduce the cold air in the insulation layer into the mixing tube to mix with the high-temperature exhaust gas; the rear end surface of the mixing tube is hinged with a flap matched with the inclined surface of the mixing tube, and the flap blocks the mixed air in the mixing tube when it is tightly attached to the inclined surface of the mixing tube, and releases the mixed air in the mixing tube into the waste heat boiler body when the flap is pulled up.

[0006] Preferably, the rear end face of the mixing tube has an oblique surface at an angle of 20° to the radial section of the mixing tube, the upper end of the flap is hinged to the outer periphery of the mixing tube, and the lower end of the flap is hinged to a pull rod for pulling the flap away from the oblique surface of the mixing tube.

[0007] Furthermore, an actuator is arranged outside the waste heat boiler body, a push rod of the actuator is hinged with a swing rod, and the lower end of the swing rod is hinged with the pull rod.

[0008] Furthermore, a conical rectifying sleeve is fixedly connected to the rear end face of the central pipe inside the waste heat boiler body, and the front ends of the connecting pipe and the mixing pipe are located inside the conical rectifying sleeve.

[0009] Furthermore, four circumferentially evenly distributed support rods are fixedly connected between the inner wall of the rear side end of the conical rectifying sleeve and the outer wall of the mixing pipe.

[0010] Specifically, the front end face of the connecting pipe is fixedly welded to the rear end face of the central pipe. The rear end face of the connecting pipe has a first flange, and the front end face of the mixing pipe has a second flange fixedly connected to the first flange.

[0011] The beneficial effects of the present utility model are as follows: By fixedly connecting the mixing pipe axially to the central pipe and arranging a flap on the end face of the mixing pipe to match with an inclined plane, the mixed air in the mixing pipe is released into the waste heat boiler body by pulling the flap. The structure is simple, and the components are not easily deformed by high temperature, ensuring the normal use of the regulator. Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 is a schematic structural diagram of the present utility model.

[0014] Figure 2 is a schematic structural diagram of the mixing pipe of the present utility model.

[0015] In the figure: 1. Waste heat boiler body, 2. Heat insulation layer, 3. Central pipe, 4. Connecting pipe, 5. Mixing pipe, 5-1. Vent hole, 5-2. Inclined cutting surface, 6. Flap, 7. Pull rod, 8. Actuator, 9. Swing rod, 10. Conical rectifying sleeve, 11. Support rod. Detailed Embodiments

[0016] The present utility model will now be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0017] As Figure 1 shown, a flap-type waste heat boiler waste heat recovery regulator, the waste heat boiler includes a waste heat boiler body 1. The intake end inside the waste heat boiler body 1 has a sealed space surrounded by a heat insulation layer 2. An actuator 8 is provided outside the waste heat boiler body 1. The actuator 8 adopts a piston drive structure. A push rod is connected to the piston, and a swing rod 9 located inside the waste heat boiler body 1 is hinged to the push rod.

[0018] The regulator is arranged in the enclosed space surrounded by the heat insulation layer 2, and includes a central pipe 3 fixed on the side wall of the waste heat boiler body 1. The front end of the central pipe 3 is connected to the exhaust end of the industrial boiler tail gas to introduce high-temperature tail gas into the waste heat boiler body 1, and the rear end of the central pipe 3 extends into the enclosed space surrounded by the heat insulation layer 2.

[0019] In the enclosed space surrounded by the heat insulation layer 2, there is a connecting pipe 4 and a mixing pipe 5 coaxial with the central pipe. The rear end face of the central pipe 3 is axially welded and fixed to the front end face of the connecting pipe 4. The rear end face of the connecting pipe 4 has a first flange, and the front end face of the mixing pipe 5 has a second flange. The rear end face of the connecting pipe 4 is flange-connected and fixed to the front end face of the mixing pipe 5.

[0020] The rear end of the mixing pipe 5 extends out of the rear end face of the heat insulation layer 2. Four ventilation holes 5-1 evenly distributed in the circumferential direction are arranged on the outer peripheral surface of the mixing pipe 5 located in the heat insulation layer 2. The rear end face of the mixing pipe 5 has an inclined cut surface 5-2 that forms an angle of 20° with the radial cross-section of the mixing pipe 5, as Figure 2 shown. The upper end of the flap 6 is hinged to the outer periphery of the mixing pipe 5, and a pull rod 7 for pulling the flap 6 away from the inclined cut surface 5-2 of the mixing pipe 5 is hinged to the lower end of the flap 6. The pull rod 7 is hinged to the lower end of the swing rod 9.

[0021] A conical rectifying sleeve 10 is welded and fixed to the rear end face of the central pipe 3 in the waste heat boiler body 1. The front ends of the connecting pipe 4 and the mixing pipe 5 are located in the conical rectifying sleeve 10. Four support rods 11 evenly distributed in the circumferential direction are fixedly connected between the inner wall of the rear side end of the conical rectifying sleeve 10 and the outer wall of the mixing pipe 5.

[0022] The high-temperature tail gas generated by the industrial boiler is introduced through the central pipe 1 and fills the connecting pipe 4 and the mixing pipe 5. The ventilation holes 5-1 introduce the cold air in the heat insulation layer 2 into the mixing pipe 5 to mix with the high-temperature tail gas. The flap 6 is tightly attached to the inclined surface of the mixing pipe 5 to block the mixed air in the mixing pipe 5. When the actuator operates and pushes the swing rod 9 to swing, the pull rod 7 is pulled. When the pull rod 7 pulls up the flap 6, the mixed air in the mixing pipe 5 is released into the waste heat boiler body 1.

[0023] The mixed hot and cold air is discharged through a preset pipeline and can be used for boiler make-up water and domestic water, or heated air can be used as boiler combustion-supporting air or for drying materials, so as to achieve the purpose of saving fuel costs, reducing production costs, and reducing waste gas emissions.

[0024] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flap-type waste heat boiler waste heat recovery regulator, arranged in an insulation layer (2) inside a waste heat boiler, having a central tube (3), the front end of which extends out of a waste heat boiler body (1) and is connected to a boiler tail gas discharge end to allow high-temperature tail gas to pass through, wherein: The rear end of the central tube (3) is axially fixedly connected with a connecting pipe (4), and the rear end flange of the connecting pipe (4) is connected with a mixing tube (5) whose rear end extends out of the rear end surface of the insulation layer (2). The outer peripheral surface of the mixing tube (5) located in the insulation layer (2) is provided with circumferentially uniformly distributed air holes (5-1), and the air holes (5-1) introduce the cold air in the insulation layer (2) into the mixing tube (5) to mix with the high-temperature exhaust gas; the rear end surface of the mixing tube (5) is hinged with a flap (6) matching the inclined surface of the mixing tube (5), and the flap (6) blocks the mixed air in the mixing tube (5) when it is tightly attached to the inclined surface of the mixing tube (5), and releases the mixed air in the mixing tube (5) into the waste heat boiler body (1) when the flap (6) is pulled up.

2. The flap-type waste heat boiler waste heat recovery regulator according to claim 1 is characterized in that: The rear end face of the mixing tube (5) has an oblique surface (5-2) which forms an angle of 20° with the radial section of the mixing tube (5); the upper end of the flap (6) is hinged to the outer periphery of the mixing tube (5); and the lower end of the flap (6) is hinged to a pull rod (7) for pulling the flap (6) away from the oblique surface (5-2) of the mixing tube (5).

3. The flap-type waste heat boiler waste heat recovery regulator according to claim 2 is characterized in that: An actuator (8) is arranged outside the waste heat boiler body (1), a push rod of the actuator (8) is hinged with a swing rod (9), and the lower end of the swing rod (9) is hinged with the pull rod (7).

4. The flap-type waste heat boiler waste heat recovery regulator according to claim 1 is characterized in that: A conical flow-regulating sleeve (10) is fixedly connected to the rear end surface of the central tube (3) in the waste heat boiler body (1), and the front ends of the connecting pipe (4) and the mixing pipe (5) are located in the conical flow-regulating sleeve (10).

5. The flap-type waste heat boiler waste heat recovery regulator according to claim 4 is characterized in that: Four circumferentially evenly distributed support rods (11) are fixedly connected between the inner wall of the rear end of the conical fairing sleeve (10) and the outer wall of the mixing tube (5).

6. The flap-type waste heat boiler waste heat recovery regulator according to claim 1 is characterized in that: The front end face of the connecting pipe (4) is welded and fixed to the rear end face of the central pipe (3); the rear end face of the connecting pipe (4) has a first flange, and the front end face of the mixing pipe (5) has a second flange fixed to the first flange.

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