A kiln waste heat recovery and reuse system

Abstract

The present invention discloses a kiln waste heat recovery and reuse system, which includes a kiln, a superconducting heat exchanger, a blower, an induced draft fan, and a filter dust collector. The superconducting heat exchanger is connected to the kiln, the blower, the induced draft fan and the waste heat recovery equipment through pipelines, respectively. The blower and / or the induced draft fan is a double-suction centrifugal fan, and the fan includes a volute, an impeller, a collector, and a volute air inlet. Two collectors are respectively installed at positions corresponding to the volute air inlet; it is characterized in that: the fan also includes an adjustment mechanism, and the two ends of the adjustment mechanism are respectively connected to the two collectors, which are used to synchronously adjust the angles of the two collectors relative to a vertical line, and the vertical line is perpendicular to the impeller axial direction. Through the design of the adjustment mechanism, the installation angles of the two collectors can be synchronously adjusted within the range of the angle a to adapt to a variety of / a series of fan operating flow conditions, so as to better match the superconducting heat exchanger's demand for air volume and the matching of heat exchange rate.

Description

Technical Field

[0001] The invention relates to the technical field of kiln waste heat and tail gas recovery and reuse, and in particular to a kiln waste heat recovery and reuse system. Background Art

[0002] like Figure 1-2 As shown, the existing kiln waste heat recovery and reuse system includes a kiln, a superconducting heat exchanger, a blower, an induced draft fan, and a filter dust collector. The high-temperature hot air of the kiln is connected to the first port of the superconducting heat exchanger through a first pipe, the second port of the superconducting heat exchanger is connected to the induced draft fan through a second pipe, the blower is connected to the third port of the superconducting heat exchanger through a third pipe, the fourth port of the superconducting heat exchanger is connected to a drying tower, a waste heat boiler or a drying box through a fourth pipe, the induced draft fan is connected to the filter dust collector through a pipe, the drying tower, the waste heat boiler or the drying box is used to realize the recovery and reuse of the kiln waste heat, and the cooled tail gas is discharged after passing through the filter dust collector, and the blower or induced draft fan is a double-suction centrifugal fan. However, the existing double-suction centrifugal fan has the problem that the installation angle of the two collectors cannot be adjusted to match the corresponding fan air volume according to the air volume demand and heat exchange rate of the superconducting heat exchanger. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a kiln waste heat recovery and reuse system. Through the design of the adjustment mechanism, the installation angles of the two collectors can be synchronously adjusted within the angle a range to adapt to a variety / a series of fan operating flow rates, thereby better matching the superconducting heat exchanger's demand for air volume and heat exchange rate.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A kiln waste heat recovery and reuse system comprises a kiln, a superconducting heat exchanger, a blower, an induced draft fan, a filter dust collector, and a waste heat recovery device. The high-temperature hot gas of the kiln is connected to the first port of the superconducting heat exchanger through a first pipeline, the second port of the superconducting heat exchanger is connected to the induced draft fan through a second pipeline, the blower is connected to the third port of the superconducting heat exchanger through a third pipeline, the fourth port of the superconducting heat exchanger is connected to the waste heat recovery device through a fourth pipeline, the induced draft fan is connected to the filter dust collector through a pipeline, and the waste heat recovery device is used to realize the recovery and reuse of the waste heat of the kiln. The blower and / or the induced draft fan is a double-suction centrifugal fan, the double-suction centrifugal fan comprises a volute (1), an impeller (2), a collector (3), and a volute air inlet (4), the impeller being installed in the volute, the axial ends of the volute are respectively provided with volute air inlets, and the two collectors are respectively installed at positions corresponding to the volute air inlets; the double-suction centrifugal fan is characterized in that: the double-suction centrifugal fan also comprises an adjustment mechanism (5), the two ends of the adjustment mechanism are respectively connected to the two collectors, and are used to synchronously adjust the angles of the two collectors relative to a vertical line, and the vertical line is perpendicular to the axial direction of the impeller.

[0006] Furthermore, the adjustment mechanism (5) comprises a support seat (51), a screw (52), a bearing seat (53), an adjustment plate (54), a locking nut (55), a first pivot portion (56), a first connecting plate (57), a second pivot portion (58), and a second connecting plate (59), wherein the two support seats are respectively mounted on both sides of the upper end of the outer wall of the volute, the support seat is connected to the bearing seat, the two ends of the screw are respectively connected to the adjustment plates, the adjustment plate is spirally connected to the screw, and under the rotation drive of the screw, the adjustment plate moves axially, the outer side surface of the adjustment plate 4 is provided with a locking nut, the locking nut is used to fix the adjustment plate when the adjustment plate is adjusted to a set position, the lower end of the adjustment plate is connected to the first pivot portion, the lower end of the first pivot portion is provided with a first connecting plate, the first connecting plate is used to be connected to the upper end of the first end face (31) of the collector, the lower end of the first end face is connected to the second connecting plate, the lower end of the second connecting plate is provided with a second pivot portion, and the second pivot portion is rotatably connected to the lower end of the outer wall of the volute.

[0007] Furthermore, the adjustment mechanism (5) further comprises an adjustment base plate (60) and an adjustment slot (61), wherein the adjustment base plate is mounted on the outer wall of the volute, the adjustment slot is provided on the adjustment base plate, the adjustment slot is a waist-shaped slot, the second pivot portion is rotatably connected to the adjustment base plate, and the pin shaft of the second pivot portion can move linearly relative to the adjustment base plate through the adjustment slot.

[0008] Furthermore, in the first position, the second end face (32) of the collector (3) is parallel to the vertical line, i.e., 0°; in the Nth position, the angle between the second end face of the collector and the vertical line is a, a=2-15°, i.e., the installation angles of the two collectors can be synchronously adjusted within the range of angle a to adapt to various fan operating flow conditions.

[0009] Furthermore, a temperature sensor is provided on the outlet pipe of the kiln, and the installation angles of the two collectors (3) are automatically or manually adjusted based on the detection result of the temperature sensor to better match the air volume demand and heat exchange rate of the superconducting heat exchanger.

[0010] Furthermore, the screw (52) is a bidirectional screw, with a first screw segment and a second screw segment respectively provided at both ends of the screw, and the first screw segment and the second screw segment have opposite rotation directions, so that the two adjustment plates (54) can move away from or towards each other, and the screw can be driven to rotate automatically or manually.

[0011] Furthermore, the adjustment plate (54), the first pivot portion (56), and the first connecting plate (57) are an integrated plate structure, the integrated plate is machined to form a threaded hole on the adjustment plate, or the adjustment plate is matched with a shaft sleeve having an internal threaded hole, and the first pivot portion is formed by bending and pressing the integrated plate.

[0012] Furthermore, the second pivoting portion (58) and the second connecting plate (59) are an integral plate-like structure, and the second pivoting portion is formed by bending and pressing the integral plate; the adjusting bottom plate (60) and the adjusting groove (61) are an integral plate-like structure, and the adjusting groove is formed by bending and pressing the integral plate.

[0013] A kiln waste heat recovery and reuse system of the present invention has an adjusting mechanism designed so that the installation angles of the two collectors can be synchronously adjusted within the angle a range to adapt to a variety of / a series of fan operating flow conditions, thereby better matching the superconducting heat exchanger's demand for air volume and heat exchange rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the principle of the existing kiln waste heat recovery and reuse system;

[0015] Figure 2 It is a schematic diagram of the structure of a blower or induced draft fan in the prior art;

[0016] Figure 3 This is a schematic diagram of the second adjustment position structure of the blower or induced draft fan of the present invention;

[0017] Figure 4 It is a schematic diagram of the first adjustment position structure of the blower or induced draft fan of the present invention.

[0018] In the figure: volute 1, impeller 2, collector 3, first end face 31, second end face 32, volute air inlet 4, adjustment mechanism 5, support seat 51, screw / screw 52, ​​bearing seat 53, adjustment plate 54, locking nut 55, first pivot part 56, first connecting plate 57, second pivot part 58, second connecting plate 59, adjustment base plate 60, adjustment slot / adjustment hole 61. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1-2 As shown, an existing kiln waste heat recovery and reuse system includes a kiln, a superconducting heat exchanger, a blower, an induced draft fan, and a filter dust collector. The high-temperature hot air of the kiln is connected to the first port of the superconducting heat exchanger through a first pipe, the second port of the superconducting heat exchanger is connected to the induced draft fan through a second pipe, the blower is connected to the third port of the superconducting heat exchanger through a third pipe, the fourth port of the superconducting heat exchanger is connected to a drying tower, a waste heat boiler or a drying box through a fourth pipe, the induced draft fan is connected to the filter dust collector through a pipe, the drying tower, the waste heat boiler or the drying box is used to realize the recovery and reuse of the waste heat of the kiln, and the cooled exhaust gas is discharged after passing through the filter dust collector. The blower and / or the induced draft fan are double-suction centrifugal fans.

[0022] like Figure 3-4 As shown, a kiln waste heat recovery and reuse system of the present invention includes a kiln, a superconducting heat exchanger, a blower, an induced draft fan, and a filter dust collector. The superconducting heat exchanger is connected to the kiln, the blower, the induced draft fan and the waste heat recovery equipment through pipelines, respectively. The blower and / or the induced draft fan is a double-suction centrifugal fan, and the double-suction centrifugal fan includes a volute 1, an impeller 2, a collector 3, and a volute air inlet 4. The impeller 2 is installed in the volute 1, and the volute air inlets 4 are respectively provided at both axial ends of the volute 1. The two collectors 3 are respectively installed at positions corresponding to the volute air inlet 4; it is characterized in that: the double-suction centrifugal fan also includes an adjusting mechanism 5, and the two ends of the adjusting mechanism 5 are respectively connected to the two collectors 3, which are used to synchronously adjust the angles of the two collectors 3 relative to a vertical line, and the vertical line is perpendicular to the impeller axis.

[0023] The adjusting mechanism 5 includes a support seat 51, a screw rod 52, a bearing seat 53, an adjusting plate 54, a locking nut 55, a first pivot portion 56, a first connecting plate 57, a second pivot portion 58, and a second connecting plate 59. The two support seats 51 are respectively installed on both sides of the upper end of the outer wall of the volute 1, and the support seat 51 is connected to the bearing seat 53. The two ends of the screw rod 52 are respectively connected to the adjusting plates 54. The adjusting plates 54 are threadedly connected to the screw rod 52, and under the rotation drive of the screw rod 52, the adjusting plates 54 move axially, and the outer side of the adjusting plates 54 is A locking nut 55 is provided, and the locking nut 55 is used for positioning / fixing the adjusting plate 54 when the adjusting plate 54 is adjusted to a set position. The lower end of the adjusting plate 54 is connected to a first pivot portion 56, and the lower end of the first pivot portion 56 is provided with a first connecting plate 57, and the first connecting plate 57 is used to connect to the upper end of the first end face 31 of the collector 3, and the lower end of the first end face 31 is connected to a second connecting plate 59, and the lower end of the second connecting plate 59 is provided with a second pivot portion 58, and the second pivot portion 58 is rotatably connected to the lower end of the outer wall of the volute 1.

[0024] The adjustment mechanism 5 also includes an adjustment base plate 60 and an adjustment slot / adjustment hole 61. The adjustment base plate 60 is installed on the outer wall of the volute 1. An adjustment slot 61 is provided on the adjustment base plate 60. The adjustment slot 61 is a waist-shaped slot. The second pivot portion 58 is rotatably connected to the adjustment base plate 60, and the pin shaft of the second pivot portion 58 can move linearly relative to the adjustment base plate 60 through the adjustment slot 61.

[0025] In the first position, the second end face 32 of the collector 3 is parallel to the vertical line, that is, 0°; in the Nth position, the angle between the second end face 32 of the collector 3 and the vertical line is a, a=2-10°; that is, the installation angles of the two collectors 3 can be synchronously adjusted within the range of angle a to adapt to multiple / series of fan operating flow conditions.

[0026] A kiln waste heat recovery and reuse system of the present invention, through the design of the adjustment mechanism 5, the installation angles of the two collectors 3 can be synchronously adjusted within the range of the angle a to adapt to a variety / a series of fan operating flow rates, thereby better matching the superconducting heat exchanger's demand for air volume and heat exchange rate.

[0027] Furthermore, a temperature sensor is provided on the outlet pipe of the kiln, and the installation angles of the two collectors 3 are automatically or manually adjusted based on the detection result of the temperature sensor to better match the air volume demand and heat exchange rate of the superconducting heat exchanger.

[0028] The screw 52 is a bidirectional screw, with a first screw segment and a second screw segment respectively disposed at both ends of the screw 52. The first screw segment and the second screw segment have opposite rotation directions, so that the two adjustment plates 54 can move away from or towards each other. The screw 52 can be driven to rotate automatically or manually.

[0029] The adjustment plate 54, the first pivot part 56, and the first connecting plate 57 are an integrated plate structure. The integrated plate is machined to form a threaded hole on the adjustment plate 54, or the adjustment plate 54 is installed with a sleeve having an internal threaded hole. The first pivot part 56 is formed by bending and pressing the integrated plate.

[0030] The second pivot part 58 and the second connecting plate 59 are an integral plate structure, and the second pivot part 58 is formed by bending and pressing the integral plate; the adjusting bottom plate 60 and the adjusting groove 61 are an integral plate structure, and the adjusting groove 61 is formed by bending and pressing the integral plate.

[0031] A kiln waste heat recovery and reuse system of the present invention, through the design of the adjustment mechanism 5, the installation angles of the two collectors 3 can be synchronously adjusted within the range of the angle a to adapt to a variety / a series of fan operating flow rates, thereby better matching the superconducting heat exchanger's demand for air volume and heat exchange rate.

[0032] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A kiln waste heat recovery and reuse system, comprising a kiln, a superconducting heat exchanger, a blower, an induced draft fan, a filter dust collector, and a waste heat recovery device, wherein the high-temperature hot air of the kiln is connected to a first port of the superconducting heat exchanger through a first pipeline, the second port of the superconducting heat exchanger is connected to the induced draft fan through a second pipeline, the blower is connected to a third port of the superconducting heat exchanger through a third pipeline, the fourth port of the superconducting heat exchanger is connected to the waste heat recovery device through a fourth pipeline, the induced draft fan is connected to the filter dust collector through a pipeline, the waste heat recovery device is used to realize the recovery and reuse of the waste heat of the kiln, and the cooled tail gas passing through the filter dust collector is discharged, the blower and / or the induced draft fan is a double-suction centrifugal fan, the double-suction centrifugal fan comprises a volute (1), an impeller (2), a collector (3), and a volute air inlet (4), the impeller is installed in the volute, the axial ends of the volute are respectively provided with volute air inlets, and two collectors are respectively installed at positions corresponding to the volute air inlets; Features: The double-suction centrifugal fan also includes an adjustment mechanism (5), the two ends of which are respectively connected to the two collectors, and are used to synchronously adjust the angles of the two collectors relative to a vertical line, the vertical line being perpendicular to the impeller axis. The adjustment mechanism (5) comprises a support seat (51), a screw (52), a bearing seat (53), an adjustment plate (54), a locking nut (55), a first pivot portion (56), a first connecting plate (57), a second pivot portion (58), and a second connecting plate (59), wherein the two support seats are respectively mounted on both sides of the upper end of the outer wall of the volute, the support seat is connected to the bearing seat, the two ends of the screw are respectively connected to the adjustment plates, the adjustment plate is spirally connected to the screw, and under the rotation drive of the screw, the adjustment plate moves axially, the outer side surface of the adjustment plate is provided with a locking nut, the locking nut is used to fix the adjustment plate when the adjustment plate is adjusted to a set position, the lower end of the adjustment plate is connected to the first pivot portion, the lower end of the first pivot portion is provided with a first connecting plate, the first connecting plate is used to be connected to the upper end of the first end face (31) of the collector, the lower end of the first end face is connected to the second connecting plate, the lower end of the second connecting plate is provided with a second pivot portion, and the second pivot portion is rotatably connected to the lower end of the outer wall of the volute, The adjustment mechanism (5) further comprises an adjustment base plate (60) and an adjustment slot (61), wherein the adjustment base plate is mounted on the outer wall of the volute, the adjustment slot is provided on the adjustment base plate, the adjustment slot is a waist-shaped slot, the second pivot portion is rotatably connected to the adjustment base plate, and the pin shaft of the second pivot portion is linearly movable relative to the adjustment base plate through the adjustment slot. In the first position, the second end face (32) of the collector (3) is parallel to the vertical line, i.e., 0°; in the Nth position, the angle between the second end face of the collector and the vertical line is a, a=2-15°, i.e., the installation angles of the two collectors can be synchronously adjusted within the range of angle a to adapt to various fan operating flow conditions.

2. A kiln waste heat recovery and reuse system as claimed in claim 1, characterized in that: A temperature sensor is provided on the outlet pipe of the kiln, and the installation angles of the two collectors (3) are automatically or manually adjusted based on the detection result of the temperature sensor to better match the air volume demand and heat exchange rate of the superconducting heat exchanger.

3. A kiln waste heat recovery and reuse system as claimed in claim 2, characterized in that: The screw (52) is a bidirectional screw, with a first screw segment and a second screw segment respectively provided at both ends of the screw, and the first screw segment and the second screw segment have opposite rotation directions, so that the two adjustment plates (54) can move away from or towards each other, and the screw can be driven to rotate automatically or manually.

4. A kiln waste heat recovery and reuse system as claimed in claim 3, characterized in that: The adjustment plate (54), the first pivot portion (56), and the first connecting plate (57) are an integrated plate structure. The integrated plate is machined to form a threaded hole on the adjustment plate, or the adjustment plate is matched with a shaft sleeve having an internal threaded hole. The first pivot portion is formed by bending and pressing the integrated plate.

5. The kiln waste heat recovery and reuse system according to claim 3, characterized in that: The second pivoting portion (58) and the second connecting plate (59) are integral plate structures, and the second pivoting portion is formed by bending and pressing the integral plate; the adjusting bottom plate (60) and the adjusting groove (61) are integral plate structures, and the adjusting groove is formed by bending and pressing the integral plate.

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