Waste heat recovery self-circulation preheater

Abstract

The utility model belongs to the technical field of air pre-heaters, and particularly relates to a waste heat recovery self-circulation pre-heater which comprises a pre-heater shell, an air inlet is fixedly connected to the right side of the pre-heater shell, an air outlet is fixedly connected to the left side of the pre-heater shell, an air inlet filter screen is fixedly connected to the inner side of the air inlet, and an air outlet filter screen is fixedly connected to the inner side of the air outlet. A filter screen anti-blocking mechanism is arranged on the inner side of the air inlet, a hollow shell is fixedly connected to the outer side of the preheater shell, and a heat conduction base is fixedly connected to the interior of the hollow shell. The heat conduction seat with the fins is arranged on the outer side of the preheater shell, then the hollow shell is wrapped on the outer side of the heat conduction seat, the circulating pump is arranged on the top of the hollow shell, and the hollow shell and the preheater shell can be connected through the circulating pump. Therefore, the heat conduction seat absorbs the heat of the preheater shell and can circularly add the heat into the preheater shell, so that the heat is fully utilized, and the loss of the heat is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to a waste heat recovery self-circulating preheater. Background Art

[0002] An air preheater is a device used to heat the air entering the combustion chamber, designed to improve combustion efficiency and reduce emissions. By heating the incoming air to the appropriate temperature before the combustion chamber, the air preheater makes the combustion process more complete and efficient.

[0003] The utility model patent with announcement number CN206131051U discloses a plug-in type air preheater, including a box body, an upper tube plate and a lower tube plate are installed inside the box body, two groups of heat exchange tube bundles are inserted between the upper tube plate and the lower tube plate, an air inlet chamber and an air outlet chamber are provided above the box body, the lower tube plate and the bottom plate and side plate of the box body together form a connecting air chamber, the air inlet chamber is arranged on the side close to the hot air outlet pipe port, and the air outlet chamber is arranged on the side close to the hot air inlet pipe port; the patent inserts the heat exchange tube bundle between the upper tube plate and the lower tube plate, and the heat exchange tube bundle is extractable for easy replacement and maintenance; the utility model enters the hot air from the hot air inlet pipe port and exits from the hot air outlet pipe port. Since the pipe ports are closed, the heat loss is small; when the cold air enters, it is preheated by the hot gas and then further heated by the hot gas inlet pipe port side, the air temperature is further increased, and the heat exchange efficiency is high. Since the air flow baffle is set inside the heat exchange tube bundle, the turbulent speed of the air flow inside the tube bundle is accelerated, so that the air temperature is balanced, the temperature is high, and the heat exchange effect is good.

[0004] However, when using existing air preheaters, the casing absorbs some heat and dissipates it, resulting in heat loss. In addition, large particles such as lint are easily accumulated at the air inlet, causing blockage inside the preheater. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery self-circulating preheater, which solves the problem of heat loss caused by the casing of the existing air preheater absorbing part of the heat and dissipating it when in use, and solves the problem of large particles such as lint easily accumulating at the air inlet, thereby causing blockage inside the preheater.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waste heat recovery self-circulating preheater, comprising a preheater casing, an air inlet fixedly connected to the right side of the preheater casing, an air outlet fixedly connected to the left side of the preheater casing, an air intake filter fixedly connected to the inner side of the air inlet, a filter anti-blocking mechanism provided on the inner side of the air inlet, a hollow shell fixedly connected to the outer side of the preheater casing, a heat conducting seat fixedly connected to the interior of the hollow shell, and the heat conducting seat is in contact with the preheater casing, a circulating pump fixedly installed on the top of the hollow shell, the input end of the circulating pump connected to the hollow shell, and the output end of the circulating pump connected to the preheater casing.

[0007] Preferably, a plurality of fins are fixedly connected to the outer side of the heat conducting base, and the fins and the heat conducting base are an integrated structure. The provision of the fins can increase the heat exchange capacity of the heat conducting base.

[0008] Preferably, the hollow shell is a hollow box body, and a through hole is provided on the left side of the hollow shell. The hollow shell is arranged into a hollow box body to facilitate the circulation of air inside the hollow shell.

[0009] Preferably, the filter anti-blocking mechanism includes a protrusion fixedly connected to the air inlet filter, a fixing bracket fixedly connected to the inner side of the air inlet, a motor disposed at the end of the fixing bracket, a linkage shaft fixedly connected to the end of the motor's output shaft, a fan blade fixedly connected to the middle section of the linkage shaft, a shaped frame fixedly connected to the front section of the linkage shaft, a sliding sleeve slidably sleeved on the outer side of the horizontal portion of the shaped frame, and a spring disposed on the inner side of the sliding sleeve. The filter anti-blocking mechanism prevents the air inlet filter from lint accumulation and clogging.

[0010] Preferably, there are multiple fixing brackets, and the fixing brackets are distributed in a circular array. The arrangement of the fixing brackets facilitates fixing the motor.

[0011] Preferably, one end of the spring is fixedly connected to the special-shaped frame, and the other end of the spring is fixedly connected to the inner surface of the sliding sleeve. Through the arrangement of the spring, elastic force can be applied to the sliding sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The utility model sets an air intake filter in the air intake of the preheater casing to filter the flue gas entering the boiler. In addition, a filter anti-blocking mechanism is set on the inner side of the air intake, wherein the motor can not only drive the fan blades on the linkage shaft to rotate, thereby assisting the entry of flue gas, but also the special-shaped frame on the linkage shaft rotates synchronously, and the sliding sleeve on the special-shaped frame will periodically hit the protrusion on the air intake filter, thereby causing the air intake filter to vibrate, which has the effect of preventing the accumulation of lint and clogging of the air intake filter.

[0014] 2. The utility model arranges a heat-conducting seat with fins on the outside of the preheater casing, and then covers the outside of the heat-conducting seat with a hollow shell. A circulation pump is arranged on the top of the hollow shell. The circulation pump can connect the hollow shell and the preheater casing. In this way, the heat-conducting seat absorbs the heat of the preheater casing and circulates it into the preheater casing, thereby making full use of the heat and reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 Front cross-sectional view of

[0017] Figure 3 For the utility model Figure 2 A magnified view of the structure at point A;

[0018] Figure 4 For the utility model Figure 2 A three-dimensional diagram of the thermal seat structure.

[0019] In the figure: 1. Preheater casing; 2. Air inlet; 3. Air outlet; 4. Air inlet filter; 5. Filter anti-blocking mechanism; 6. Heat transfer seat; 7. Fins; 8. Hollow shell; 9. Circulation pump; 51. Bump; 52. Fixing bracket; 53. Motor; 54. Linkage shaft; 55. Fan blade; 56. Special-shaped frame; 57. Sleeve; 58. Spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 、 Figure 2 、 Figure 4A waste heat recovery self-circulating preheater includes a preheater casing 1, an air inlet 2 is fixedly connected to the right side of the preheater casing 1, an air outlet 3 is fixedly connected to the left side of the preheater casing 1, an air inlet filter 4 is fixedly connected to the inner side of the air inlet 2, and a filter anti-blocking mechanism 5 is provided on the inner side of the air inlet 2, a hollow shell 8 is fixedly connected to the outer side of the preheater casing 1, a heat conducting seat 6 is fixedly connected to the inside of the hollow shell 8, and the heat conducting seat 6 is in contact with the preheater casing 1, a circulating pump 9 is fixedly installed on the top of the hollow shell 8, the input end of the circulating pump 9 is connected to the hollow shell 8, and the output end of the circulating pump 9 is connected to the preheater casing 1.

[0022] See also Figure 1 、 Figure 2 、 Figure 4 A plurality of fins 7 are fixedly connected to the outer side of the heat conducting base 6, and the fins 7 and the heat conducting base 6 are integrally formed. The provision of the fins 7 can increase the heat exchange capacity of the heat conducting base 6. The hollow shell 8 is a hollow box body, and a through hole is formed on the left side of the hollow shell 8. The hollow box body configuration of the hollow shell 8 facilitates the circulation of air inside the hollow shell 8.

[0023] See also Figure 2 、 Figure 3 The filter anti-blocking mechanism 5 includes a protrusion 51 fixedly connected to the air intake filter 4. A fixing bracket 52 is fixedly connected to the inner side of the air intake 2. There are multiple fixing brackets 52, and the fixing brackets 52 are arranged in a circular array. The arrangement of the fixing bracket 52 facilitates the fixing of the motor 53. The motor 53 is disposed at the end of the fixing bracket 52. The end of the output shaft of the motor 53 is fixedly connected to a linkage shaft 54. The middle section of the linkage shaft 54 ​​is fixedly connected to a fan blade 55. The front section of the linkage shaft 54 ​​is fixedly connected to a special-shaped frame 56. The horizontal portion of the special-shaped frame 56 is slidably connected to a sliding sleeve 57. A spring 58 is disposed on the inner side of the sliding sleeve 57. One end of the spring 58 is fixedly connected to the special-shaped frame 56, and the other end of the spring 58 is fixedly connected to the inner surface of the sliding sleeve 57. The arrangement of the spring 58 allows an elastic force to be applied to the sliding sleeve 57. The arrangement of the filter anti-blocking mechanism 5 prevents the air intake filter 4 from clogging due to the accumulation of lint.

[0024] The specific implementation process of the utility model is as follows: when in use, the motor 53 is started, the motor 53 drives the linkage shaft 54 ​​to rotate, and the linkage shaft 54 ​​drives the fan blade 55 to rotate, thereby introducing the smoke from the air inlet 2. Before being introduced, the smoke will be filtered out by the air intake filter 4 to remove large particles of debris such as lint. In addition, while the linkage shaft 54 ​​rotates, the sliding sleeve 57 on the special-shaped frame 56 will periodically hit the protrusion 51, thereby causing the air intake filter 4 to vibrate, which has the effect of preventing the accumulation of lint on the air intake filter 4.

[0025] In addition, the heat conducting seat 6 and the fins 7 will absorb the heat of the preheater casing 1, and the circulating pump 9 will draw the air in the hollow shell 8 into the preheater casing 1 and circulate the heat into the preheater casing 1, thereby making full use of the heat and reducing heat loss.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery self-circulating preheater, comprising a preheater housing (1), characterized in that: The right side of the preheater casing (1) is fixedly connected to an air inlet (2), the left side of the preheater casing (1) is fixedly connected to an air outlet (3), the inner side of the air inlet (2) is fixedly connected to an air inlet filter (4), the inner side of the air inlet (2) is provided with a filter anti-blocking mechanism (5), the outer side of the preheater casing (1) is fixedly connected to a hollow shell (8), the interior of the hollow shell (8) is fixedly connected to a heat conducting seat (6), and the heat conducting seat (6) is in contact with the preheater casing (1), and a circulating pump (9) is fixedly installed on the top of the hollow shell (8), the input end of the circulating pump (9) is connected to the hollow shell (8), and the output end of the circulating pump (9) is connected to the preheater casing (1).

2. The waste heat recovery self-circulating preheater according to claim 1, characterized in that: A plurality of fins (7) are fixedly connected to the outer side of the heat-conducting seat (6), and the fins (7) and the heat-conducting seat (6) are an integrated structure.

3. The waste heat recovery self-circulating preheater according to claim 1, characterized in that: The hollow shell (8) is a hollow box body, and a through hole is provided on the left side of the hollow shell (8).

4. The waste heat recovery self-circulating preheater according to claim 1, characterized in that: The filter screen anti-blocking mechanism (5) comprises a protrusion (51) fixedly connected to the air intake filter screen (4); a fixing frame (52) is fixedly connected to the inner side of the air intake port (2); a motor (53) is provided at the end of the fixing frame (52); a linkage shaft (54) is fixedly connected to the end of the output shaft of the motor (53); a fan blade (55) is fixedly connected to the middle section of the linkage shaft (54); a special-shaped frame (56) is fixedly connected to the front section of the linkage shaft (54); a sliding sleeve (57) is slidably sleeved on the outer side of the horizontal portion of the special-shaped frame (56); and a spring (58) is provided on the inner side of the sliding sleeve (57).

5. The waste heat recovery self-circulating preheater according to claim 4, characterized in that: There are multiple fixing frames (52), and the multiple fixing frames (52) are distributed in a ring array.

6. The waste heat recovery self-circulating preheater according to claim 4, characterized in that: One end of the spring (58) is fixedly connected to the special-shaped frame (56), and the other end of the spring (58) is fixedly connected to the inner surface of the sliding sleeve (57).

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