Ring cooler waste heat recovery device and method of use thereof

Abstract

The application discloses a kind of ring cooling machine waste heat recovery device and its using method, belong to waste heat recovery technical field, waste heat recovery device includes water supply component, gas pipeline and several water tanks.The waste heat recovery device of the present application passes through the heat of flue gas with heat in sequence through multiple water tanks, and can judge the temperature of flue gas according to the heat change in heat tank, so as to determine the temperature when flue gas is discharged, can make the water tank maximum degree of absorption heat of flue gas, avoid the energy waste caused by incomplete heat absorption, the temperature in the corresponding water tank in the waste heat recovery device is higher than the temperature of flue gas, the third solenoid valve and the second solenoid valve corresponding to the corresponding water tank are closed, to avoid lower temperature water vapor from the corresponding water tank, so as to avoid water vapor to take out the heat in water tank, by setting distance sensor, both can judge the water level in water tank, and can judge the temperature in water tank when collecting heat in flue gas.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waste heat recovery, and particularly relates to a ring cooler waste heat recovery device and a use method thereof. BACKGROUND

[0002] The ring cooler is a ring cooler, and its function is to effectively cool the hot sinter discharged from the sintering machine. Compared with the belt cooler, the ring cooler has the advantages of small occupied area, low investment, high equipment utilization rate, etc.

[0003] The existing ring cooler produces excess waste heat after working, and therefore generally recovers the waste heat through a waste heat recovery device. The traditional heat recovery mode is to transport the waste heat in the ring cooler flue gas to a water tank, and then guide the heat out through the water in the water tank for utilization. The inner diameter of the air inlet is larger than that of the air outlet, which can effectively ensure that the flue gas stays in the water tank for a certain time, and ensure that the waste heat utilization rate is high. However, as the water temperature in the water tank increases, the heat absorption of the flue gas is limited, and the finally discharged flue gas still has a lot of heat, which causes waste of heat. In view of this, the application provides a ring cooler waste heat recovery device and a use method thereof.

[0004] It should be noted that the above content belongs to the technical cognition range of the inventor, and does not necessarily constitute the prior art. SUMMARY

[0005] In order to solve the above problems, the purpose of the application is to provide a ring cooler waste heat recovery device, which can recover the heat in the flue gas by sequentially passing the flue gas with heat through multiple water tanks, and can determine the temperature of the flue gas according to the change of the heat in the heat water tank, so as to determine the temperature of the flue gas when it is discharged, so that the water tank can absorb the heat of the flue gas to the maximum extent, and avoid energy waste caused by incomplete heat absorption.

[0006] In order to achieve the above purpose, the application provides a ring cooler waste heat recovery device, which comprises a water supply assembly, a gas conveying pipeline and a plurality of water tanks.

[0007] The gas conveying pipeline comprises an air inlet pipe connected with the exhaust pipe of the ring cooler, a serpentine pipe arranged in the water tank, a first connecting pipe connected with one end of the serpentine pipe, and a second connecting pipe connected with the other end of the serpentine pipe, wherein the first connecting pipe is communicated with the air inlet pipe, the second connecting pipe located at the tail of the water tank is closed at one end, and the other second connecting pipes are connected with the first connecting pipes of the adjacent water tanks at one end.

[0008] Further, the water supply assembly comprises a water pump, a first water outlet pipe connected with the water pump, a first water inlet pipe communicated with the water tank, and a first electromagnetic valve arranged on the first water inlet pipe.

[0009] Further, the waste heat recovery device further comprises a water outlet main pipe, a drain pipe communicated with the bottom of the water tank, and a fifth electromagnetic valve arranged on the drain pipe.

[0010] Further, the water tank is internally provided with a floating plate, the floating plate is hollow, the water tank is internally fixed with a support ring for supporting the floating plate, the support ring is located above the serpentine pipe, an air cylinder is communicated with the top of the floating plate, the air cylinder is slidably connected with the top of the water tank, a piston is slidably arranged in the air cylinder, and an air outlet is arranged on the top of the air cylinder.

[0011] Further, the water tank is internally provided with a floating plate, the floating plate is hollow, the water tank is internally fixed with a support ring for supporting the floating plate, the support ring is located above the serpentine pipe, an air cylinder is communicated with the top of the floating plate, the air cylinder is slidably connected with the top of the water tank, a piston is slidably arranged in the air cylinder, and an air outlet is arranged on the top of the air cylinder.

[0012] Further, the water tanks are arranged in a straight line.

[0013] A use method of the waste heat recovery device of the ring cooler, the use method is as follows:

[0014] The corresponding first electromagnetic valve is opened to inject water into the water tank, when the water level is higher than the support ring, the floating plate is floated to drive the air cylinder to rise, the water level in the water tank is determined by the distance sensor detecting the height change of the air cylinder, and when the water level reaches the preset value, the corresponding first electromagnetic valve is closed.

[0015] When the water level reaches the preset value, the temperature in the water tank is determined by observing the distance detected by the distance sensor.

[0016] The second electromagnetic valve and the third electromagnetic valve corresponding to the water tank reaching the preset temperature are closed, the fifth electromagnetic valve corresponding to the water tank is opened, and the hot water of the preset temperature is delivered through the water main.

[0017] The sixth electromagnetic valve corresponding to one of the water tanks is opened, and then the flue gas output by the flue gas pipe is controlled by the second electromagnetic valve and the third electromagnetic valve to sequentially pass through the serpentine pipe in the water tank to be heated.

[0018] The fourth electromagnetic valve corresponding to the last water tank to be transmitted is opened, so that the flue gas is finally discharged from the corresponding exhaust pipe.

[0019] When the temperature in the corresponding water tank is higher than the temperature of the flue gas, the third electromagnetic valve and the second electromagnetic valve corresponding to the water tank are closed.

[0020] Further, the temperature in the water tank is higher than the temperature of the flue gas, and the temperature in the water tank is not increased after the flue gas passes through the corresponding water tank for a preset time.

[0021] The waste heat recovery device for a circular cooler and the use method thereof can bring the following beneficial effects:

[0022] 1、The waste heat recovery device recovers the heat in the flue gas by sequentially passing the flue gas with heat through multiple water tanks, and determines the temperature of the flue gas according to the change of the heat in the heat tank, so as to determine the temperature of the flue gas when it is discharged, so that the water tank can absorb the heat of the flue gas to the maximum extent, and energy waste caused by incomplete heat absorption is avoided.

[0023] 2、When the temperature in the corresponding water tank is higher than the temperature of the flue gas, the third electromagnetic valve and the second electromagnetic valve corresponding to the water tank are closed, so that the water vapor at a lower temperature cannot pass through the corresponding water tank, thereby avoiding the water vapor taking out the heat in the water tank.

[0024] 3、The waste heat recovery device is provided with a distance sensor, which can judge the water level in the water tank when water is injected and drained, and can judge the temperature in the water tank when the heat in the flue gas is collected, so that one machine can be used for multiple purposes, and the equipment cost is saved.

[0025] 4、The waste heat recovery device opens the sixth electromagnetic valve corresponding to one of the water tanks, and then controls the flue gas output by the flue gas pipe by the second electromagnetic valve and the third electromagnetic valve to sequentially pass through the serpentine pipe in the water tank to be heated, so that the hot gas can selectively pass through the water tank. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0027] Figure 1 A first perspective view of a structure of a ring cooler waste heat recovery device and a method of using the same.

[0028] Figure 2 A second perspective view of a structure of a ring cooler waste heat recovery device and a method of using the same.

[0029] Figure 3 A Figure 2 An enlarged view of structure at A in FIG. 4. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concepts of the present application, the following will be described in detail with reference to the accompanying drawings.

[0031] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the specification, the description referring to the terms "one scheme", "some schemes", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the scheme or example are included in at least one scheme or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more schemes or examples in a suitable manner.

[0035] The embodiment of the present application provides a waste heat recovery device of a circular cooler, as shown in the drawings. Figure 1 The waste heat recovery device comprises a water supply assembly, a gas conveying pipeline and a plurality of water tanks 1 arranged in a straight line.

[0036] The water supply assembly comprises a water pump 2, a first water outlet pipe 3 connected to the water pump 2, a first water inlet pipe 4 communicated and arranged on the water tank 1, the first water inlet pipe 4 communicated with the first water outlet pipe 3, and a first electromagnetic valve 5 installed on the first water inlet pipe 4.

[0037] The gas conveying pipeline comprises an air inlet pipe 6 connected to an exhaust pipe of the circular cooler, and a serpentine pipe 10 arranged in the water tank 1, as shown in the drawings. Figure 2 One end of the serpentine pipe 10 is connected with a first connecting pipe 7, and the other end is connected with a second connecting pipe 9, the first connecting pipe 7 is communicated with the air inlet pipe 6, the second connecting pipe 9 on the water tank 1 at the tail end is closed at one end in the outside, and the other second connecting pipes 9 are connected with the first connecting pipes 7 on the adjacent water tanks 1 at one end in the outside, the gas conveying pipeline further comprises a third connecting pipe 12, a fifth connecting pipe 13 communicated and arranged on the second connecting pipe 9 and the first connecting pipe 7 at the head, the fifth connecting pipe 13 is communicated with the third connecting pipe 12, a second electromagnetic valve 11 is installed on the second connecting pipe 9, a third electromagnetic valve 14 is installed on the fifth connecting pipe 13, an exhaust pipe 25 communicated and arranged on the second connecting pipe 9, a fourth electromagnetic valve 26 installed on the exhaust pipe 25, a sixth electromagnetic valve 8 installed on the first connecting pipe 7, and the exhaust pipe 25 and the fifth connecting pipe 13 are both located at the side of the second electromagnetic valve 11 close to the corresponding water tank 1.

[0038] The waste heat recovery device further comprises a water outlet main pipe 15, a drain pipe 16 communicated and arranged at the bottom of the water tank 1, the drain pipe 16 is communicated with the water outlet main pipe 15, and a fifth electromagnetic valve 17 is installed on the drain pipe 16.

[0039] The inside of the water tank 1 is provided with a floating plate 19, as shown in the drawings. Figure 3As shown, the inside of the floating plate 19 is hollow, the inside of the water tank 1 is fixed with a support ring 18 for supporting the floating plate 19, the support ring 18 is located above the serpentine pipe 10, the top of the floating plate 19 is connected with a gas cylinder 20, the gas cylinder 20 is slidably connected with the top of the water tank 1, the inside of the gas cylinder 20 is slidably provided with a piston 21, the top of the gas cylinder 20 is provided with a gas outlet 22, the top of the water tank 1 is fixed with an L-shaped support 23, the top plate of the L-shaped support 23 is fixed below with a distance sensor 24 for detecting the height of the piston 21, the distance sensor 24 is located directly above the gas outlet 22, and the distance sensor 24 is electrically connected with a preset control system.

[0040] A use method of a waste heat recovery device of a circular cooler, the use method is as follows:

[0041] Opening the corresponding first electromagnetic valve 5 can inject water into the water tank 1, when the water level is higher than the support ring 18, the floating plate 19 is floated, thereby driving the gas cylinder 20 to rise, and the height change of the gas cylinder 20 detected by the distance sensor 24 can determine the water level in the water tank 1, when the water level reaches the preset value, the corresponding first electromagnetic valve 5 is closed.

[0042] When the water level reaches the preset value, the sliding distance of the piston 21 in the gas cylinder 20 can be determined by observing the distance detected by the distance sensor 24, thereby determining the expansion degree of the gas in the floating plate 19, and determining the temperature in the water tank 1.

[0043] The corresponding second electromagnetic valve 11 and third electromagnetic valve 14 of the water tank 1 which has reached the preset temperature are closed, and the corresponding fifth electromagnetic valve 17 is opened, and the hot water of the preset temperature is transported through the water main pipe 15.

[0044] Opening the corresponding sixth electromagnetic valve 8 of one of the water tanks 1, and then the flue gas output by the smoke exhaust pipe is sequentially passed through the serpentine pipe 10 in the water tank 1 which needs to be heated through the cooperation of the second electromagnetic valve 11 and the third electromagnetic valve 14, and the specific control mode is as follows:

[0045] When the flue gas is transmitted in the positive direction between two adjacent water tanks 1, the second electromagnetic valve 11 between the corresponding two water tanks 1 is opened;

[0046] When the flue gas is transmitted in the positive direction between two non-adjacent water tanks 1 or is transmitted in the reverse direction between two water tanks 1, the third electromagnetic valve 14 corresponding to the transmission side water tank 1 and the third electromagnetic valve 14 and the second electromagnetic valve 11 corresponding to the front side adjacent water tank 1 of the transmission side water tank 1 are opened (only the corresponding third electromagnetic valve 14 is opened without the front side water tank);

[0047] Opening the fourth electromagnetic valve 26 corresponding to the last transmission water tank 1, so that the flue gas is finally discharged from the corresponding exhaust pipe 25.

[0048] When the temperature in the corresponding water tank 1 is higher than the temperature of the flue gas, the judgment mode is that the temperature in the corresponding water tank 1 does not increase after the flue gas passes through the corresponding water tank 1 for a preset time, at which time the third electromagnetic valve 14 and the second electromagnetic valve 11 corresponding to the corresponding water tank 1 are closed to avoid the lower-temperature water vapor from passing through the corresponding water tank 1, so that the water vapor can be avoided to take out the heat in the water tank 1.

[0049] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0050] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A ring cooler waste heat recovery device characterized by comprising: The waste heat recovery device comprises a water supply assembly, a gas conveying pipeline and a plurality of water tanks (1); The gas conveying pipeline comprises an air inlet pipe (6) connected to an exhaust pipe of a ring cooler, and a serpentine pipe (10) arranged in each water tank (1), one end of the serpentine pipe (10) is connected to a first connecting pipe (7), and the other end is connected to a second connecting pipe (9), the first connecting pipe (7) is in communication with the air inlet pipe (6), the second connecting pipe (9) on the tail water tank (1) is closed at one end in the outside, and the second connecting pipe (9) on the other water tanks (1) is connected to the first connecting pipe (7) on the adjacent water tank (1) at one end in the outside, the gas conveying pipeline further comprises a third connecting pipe (12), a fifth connecting pipe (13) is arranged on the second connecting pipe (9) and the first connecting pipe (7) at the head, the fifth connecting pipe (13) is in communication with the third connecting pipe (12), a second electromagnetic valve (11) is arranged on the second connecting pipe (9), a third electromagnetic valve (14) is arranged on the fifth connecting pipe (13), an exhaust pipe (25) is arranged on the second connecting pipe (9), a fourth electromagnetic valve (26) is arranged on the exhaust pipe (25), a sixth electromagnetic valve (8) is arranged on the first connecting pipe (7), and the exhaust pipe (25) and the fifth connecting pipe (13) are located on the side of the second electromagnetic valve (11) close to the corresponding water tank (1); The waste heat recovery device further comprises a water outlet main pipe (15), and a drain pipe (16) is arranged on the bottom of each water tank (1) and in communication with the water outlet main pipe (15), and a fifth electromagnetic valve (17) is arranged on the drain pipe (16); The inside of each water tank (1) is provided with a floating plate (19), the inside of the floating plate (19) is hollow, a supporting ring (18) for supporting the floating plate (19) is fixed in the inside of the water tank (1), the supporting ring (18) is located above the serpentine pipe (10), an air cylinder (20) is arranged on the top of the floating plate (19) and in communication therewith, the inside of the air cylinder (20) is slidably provided with a piston (21), and an air outlet (22) is formed in the top of the air cylinder (20); An L-shaped support (23) is fixed on the top of each water tank (1), and a distance sensor (24) for detecting the height of the piston (21) is fixed below the top plate of the L-shaped support (23); When the water level reaches a preset value, the temperature in the water tank (1) is determined by observing the distance detected by the distance sensor (24); The second electromagnetic valve (11) and the third electromagnetic valve (14) corresponding to the water tank (1) reaching the preset temperature are closed, the fifth electromagnetic valve (17) is opened, and the hot water at the preset temperature is conveyed through the water outlet main pipe (15); The sixth electromagnetic valve (8) corresponding to one of the water tanks (1) is opened, and then the flue gas output by the exhaust pipe is sequentially passed through the serpentine pipe (10) in the water tank (1) to be heated through the cooperation of the second electromagnetic valve (11) and the third electromagnetic valve (14); The fourth electromagnetic valve (26) corresponding to the last water tank (1) is opened, so that the flue gas is finally discharged from the corresponding exhaust pipe (25). When the temperature in the corresponding water tank (1) is higher than the temperature of the flue gas, the third electromagnetic valve (14) and the second electromagnetic valve (11) corresponding to the water tank (1) are closed.

2. The device according to claim 1, wherein The water supply assembly comprises a water pump (2), a first water outlet pipe (3) is connected to the water pump (2), a first water inlet pipe (4) is communicated with the water tank (1), the first water inlet pipe (4) is communicated with the first water outlet pipe (3), and a first electromagnetic valve (5) is installed on the first water inlet pipe (4).

3. A device for recovering waste heat from a ring cooler as claimed in claim 2, wherein The distance sensor (24) is located directly above the air outlet (22), and the distance sensor (24) is electrically connected to a preset control system.

4. The device according to claim 3, wherein The water tanks (1) are arranged in a straight line.

5. A device for recovering waste heat from a ring cooler as claimed in claim 4, wherein When the corresponding first electromagnetic valve (5) is opened, water is injected into the water tank (1), when the height is higher than the support ring (18), the floating plate (19) is floated, thereby driving the air cylinder (20) to rise, the height change of the air cylinder (20) is detected by the distance sensor (24), and the water level in the water tank (1) is judged, when the water level reaches a preset value, the corresponding first electromagnetic valve (5) is closed.

6. A device for recovering waste heat from a ring cooler according to claim 5, characterized in that The temperature in the water tank (1) is higher than the temperature of the flue gas, and the judgment mode is that the temperature in the water tank (1) does not rise after the flue gas passes through the corresponding water tank (1) for a preset time.

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