Waste heat recovery device for kiln

Abstract

The utility model belongs to the technical field of heat recovery, and particularly relates to a waste heat recovery device for a kiln, which comprises a heat recovery water tank and a smoke exhaust pipe. One end of the smoke exhaust pipe is connected with a smoke exhaust port of the kiln, and the other end of the smoke exhaust pipe penetrates through the heat recovery water tank. The pumping and draining mechanism is arranged on the heat recovery water tank and is suitable for mixing water in the heat recovery water tank; by arranging the pumping and discharging mechanism, when the kiln discharges high-temperature smoke through the smoke discharging pipe, waste heat in the high-temperature smoke is recycled through the heat recycling water tank, and water in the heat recycling water tank is mixed through the pumping and discharging mechanism in the recycling process, so that the heat absorption efficiency is improved, and a water body is evenly heated through the high-temperature smoke.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat recovery, and in particular relates to a waste heat recovery device for a kiln. Background Art

[0002] When industrial furnaces are in use, a large amount of high-temperature flue gas is generated, and the flue gas contains waste heat. If it is discharged directly, it will cause heat loss and accelerate the greenhouse effect. Therefore, when the flue gas is discharged on the market, the flue gas waste heat recovery device will be used to recover the waste heat in the flue gas to achieve the purpose of energy saving and environmental protection. Traditional flue gas waste heat recovery devices mostly extend the flue gas pipe into the water tank to allow the heat in the exhaust gas to heat the water body. However, the water body in the existing recovery device is generally in a non-flowing state, and its contact with the pipeline is limited. The heat absorption efficiency is slow, and the heating of the water tank water body is uneven.

[0003] Therefore, a waste heat recovery device for a kiln is designed to solve the technical problem in the prior art that when the heat in the high-temperature exhaust gas is used to heat the water body, the water body does not flow, resulting in slow heat absorption efficiency. Utility Model Content

[0004] The utility model aims to provide a waste heat recovery device for a kiln to solve the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a waste heat recovery device for a kiln, comprising:

[0006] Heat recovery water tank and exhaust pipe;

[0007] One end of the smoke exhaust pipe is connected to the smoke exhaust port of the kiln, and the other end passes through the heat recovery water tank; and

[0008] The pumping mechanism is arranged on the heat recovery water tank and is suitable for mixing the water in the heat recovery water tank.

[0009] Further, the extraction mechanism comprises:

[0010] The exhaust cylinder is connected to the inner wall of the heat recovery water tank;

[0011] A piston member is slidably connected to the inner wall of the pumping cylinder; and

[0012] A liquid inlet pipe is arranged at the bottom of the pumping and draining cylinder, and a liquid discharge pipe is arranged on the outer wall of the pumping and draining cylinder.

[0013] Furthermore, both the liquid inlet pipe and the liquid discharge pipe are provided with a one-way valve.

[0014] Furthermore, the extraction mechanism further comprises:

[0015] The piston rod is arranged on the upper end surface of the piston member, and a connecting member is arranged on the top end of the piston member;

[0016] The rotating disk is arranged on the heat recovery water tank; and

[0017] The two ends of the connecting rod are respectively connected to the turntable and the connecting piece bearing.

[0018] Furthermore, a driving motor is provided on one side of the heat recovery water tank; and

[0019] One end of the rotating shaft is connected to the output end of the driving motor, and the other end is connected to the rotating disk.

[0020] Furthermore, a driving gear is provided on the rotating shaft;

[0021] The outer side of the driving gear is meshed with a driven gear; and

[0022] The stirring shaft has one end connected with the driven gear and the other end penetrating the top of the heat recovery water tank and located inside the heat recovery water tank.

[0023] Furthermore, a stirring paddle is provided on the outer wall of one end of the stirring shaft located inside the heat recovery water tank.

[0024] The beneficial effect of the utility model is that, by providing an exhaust mechanism, when the kiln discharges high-temperature flue gas through the exhaust pipe, the heat recovery water tank is used to recover the waste heat in the high-temperature flue gas, and the exhaust mechanism is used to mix the water in the heat recovery water tank during the recovery process to improve the heat absorption efficiency and make the high-temperature flue gas heat the water body evenly.

[0025] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0029] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0030] Figure 3 The utility model Figure 2 The enlarged structural diagram of part A in the middle;

[0031] Figure 4 It is a schematic diagram of the internal structure of the heat recovery water tank of the utility model.

[0032] In the figure:

[0033] 1. Kiln; 10. Smoke exhaust pipe;

[0034] 2. Heat recovery water tank; 20. Driving motor; 21. Rotating shaft; 22. Turntable; 221. Connecting rod; 23. Pumping cylinder; 230. Piston; 231. Piston rod; 232. Connecting piece; 233. Liquid inlet pipe; 234. Liquid outlet pipe; 24. Driving gear; 25. Driven gear; 250. Agitator shaft; 251. Agitator paddle. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] When industrial furnaces are in use, a large amount of high-temperature flue gas is generated, and the flue gas contains waste heat. If it is discharged directly, it will cause heat loss and accelerate the greenhouse effect. Therefore, when the flue gas is discharged on the market, the flue gas waste heat recovery device will be used to recover the waste heat in the flue gas to achieve the purpose of energy saving and environmental protection. Traditional flue gas waste heat recovery devices mostly extend the flue gas pipe into the water tank to allow the heat in the exhaust gas to heat the water body. However, the water body in the existing recovery device is generally in a non-flowing state, and its contact with the pipeline is limited. The heat absorption efficiency is slow, and the heating of the water tank water body is uneven.

[0037] In order to solve the above technical problems, in at least one embodiment, a waste heat recovery device for a kiln is provided, comprising:

[0038] A heat recovery water tank 2 and a smoke exhaust pipe 10; wherein one end of the smoke exhaust pipe 10 is connected to the smoke exhaust port of the kiln 1, and the other end thereof passes through the heat recovery water tank 2; and a pumping mechanism, which is arranged on the heat recovery water tank 2 and is suitable for mixing the water in the heat recovery water tank 2;

[0039] By providing an exhaust mechanism, when the kiln 1 discharges the high-temperature flue gas through the exhaust pipe 10, the heat recovery water tank 2 is used to recover the waste heat in the high-temperature flue gas, and the exhaust mechanism is used to mix the water in the heat recovery water tank 2 during the recovery process to improve the heat absorption efficiency and make the high-temperature flue gas heat the water body evenly.

[0040] In some embodiments, Figures 1 to 3 As shown, one end of the smoke exhaust pipe 10 is connected to the smoke exhaust port of the furnace 1, and the smoke exhaust pipe 10 passes through the top of the heat recovery water tank 2 and extends into the heat recovery water tank 2. In order to improve the heat recovery efficiency, the smoke exhaust pipe 10 is arranged in an S shape in the heat recovery water tank 2.

[0041] In some embodiments, Figure 3 to Figure 4 As shown, the high-temperature flue gas discharged from the furnace first heats the liquid near the top of the heat recovery water tank 2 according to the placement of the exhaust pipe 10. As the heat exchange time increases, the residual heat in the high-temperature flue gas is gradually absorbed, that is, the temperature of the liquid at the top of the heat recovery water tank 2 is higher than the temperature of the liquid at the bottom. At this time, the drive motor 20 is started, and its output end drives the shaft 21 to rotate, thereby driving the turntable 22 to rotate. The two ends of the connecting rod 221 are respectively connected to the surface of the turntable 22 and the bearing of the connecting member 232. Therefore, when the turntable 22 rotates, the piston rod 231 fixed to the connecting member 232 and the piston member 232 are driven by the connecting rod 221. 30 slides in the pumping tube 23 to perform up and down reciprocating motion. When the piston 230 slides upward, negative pressure is generated in the pumping tube 23, the one-way valve in the liquid inlet pipe 233 is opened, the one-way valve in the liquid discharge pipe 234 is closed, and the liquid inlet end of the liquid inlet pipe 233 is located at the top of the heat recovery water tank 2, and the high-temperature liquid at the top of the heat recovery water tank 2 is extracted. When the piston 230 slides downward, the one-way valve in the liquid inlet pipe 233 is closed, the one-way valve in the liquid discharge pipe 234 is opened, and the liquid outlet end of the liquid discharge pipe 234 is located at the bottom of the heat recovery water tank 2, and the high-temperature liquid is discharged to the bottom of the heat recovery water tank 2, thereby realizing liquid circulation and improving heat absorption efficiency.

[0042] In some embodiments, Figure 4 As shown, when the driving motor 20 starts to drive the rotating shaft 21 to rotate, the driving gear 24 fixed on the rotating shaft 21 rotates accordingly, driving the driven gear 25 meshing therewith to rotate, and then driving the stirring shaft 250 connected to the driven gear 25 to rotate. The stirring shaft 250 passes through the top of the heat recovery water tank 2 and is connected to the bearing of the heat recovery water tank 2. During the rotation of the stirring shaft 250, a plurality of stirring paddles 251 fixed on the outer wall of the bottom end of the stirring shaft 250 are driven to rotate, so as to stir the water at the bottom of the heat recovery water tank 2. The high-temperature water at the bottom of the heat recovery water tank 2 is pumped into the high-temperature water in coordination with the above steps, so as to accelerate the mixing of the high-temperature water and the low-temperature water, so that the water in the heat recovery water tank 2 is heated evenly.

[0043] In summary, by providing an exhaust mechanism, when the kiln discharges high-temperature flue gas through the exhaust pipe, the heat recovery water tank is used to recover the waste heat in the high-temperature flue gas, and the exhaust mechanism is used to mix the water in the heat recovery water tank during the recovery process to improve the heat absorption efficiency and make the high-temperature flue gas heat the water body evenly.

[0044] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A waste heat recovery device for a kiln, characterized in that: include: Heat recovery water tank and exhaust pipe; One end of the smoke exhaust pipe is connected to the smoke exhaust port of the kiln, and the other end passes through the heat recovery water tank; as well as A pumping mechanism, arranged on the heat recovery water tank, is suitable for mixing the water in the heat recovery water tank; The extraction mechanism comprises: The exhaust cylinder is connected to the inner wall of the heat recovery water tank; A piston member is slidably connected to the inner wall of the pumping cylinder; and A liquid inlet pipe is arranged at the bottom of the pumping and exhausting cylinder, and a liquid discharge pipe is arranged on the outer wall of the pumping and exhausting cylinder; The liquid inlet pipe and the liquid discharge pipe are both provided with a one-way valve; The extraction mechanism also includes: The piston rod is arranged on the upper end surface of the piston member, and a connecting member is arranged on the top end of the piston; The turntable is arranged on the heat recovery water tank; and The two ends of the connecting rod are respectively connected to the turntable and the connecting piece bearing.

2. The waste heat recovery device for kiln according to claim 1, characterized in that: A driving motor is provided on one side of the heat recovery water tank; and One end of the rotating shaft is connected to the output end of the driving motor, and the other end is connected to the rotating disk.

3. The waste heat recovery device for kiln according to claim 2, characterized in that: A driving gear is arranged on the rotating shaft; The outer side of the driving gear is meshed with a driven gear; and The stirring shaft has one end connected with the driven gear and the other end penetrating the top of the heat recovery water tank and located inside the heat recovery water tank.

4. The waste heat recovery device for a kiln according to claim 3, characterized in that: A stirring paddle is arranged on the outer wall of one end of the stirring shaft located inside the heat recovery water tank.

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