Heat exchange device and method for removing agglomerates in heat exchange device

Abstract

The present invention relates to a heat exchange device and a method for removing agglomerates in the heat exchange device. The heat exchange device comprises: a shell for conveying hot fluid; a heat exchange tube, comprising a heat exchange section arranged in the shell, an inlet section connected to one end of the heat exchange section and passing through the shell, and an outlet section connected to the other end of the heat exchange section and passing through the shell; an adjusting component connected to the inlet section and / or outlet section of the heat exchange tube, which can repeatedly adjust the flow rate of the cold fluid in the heat exchange tube and make the heat exchange tube expand and contract under the heating action of the hot fluid, so as to induce the fission of agglomerates attached to the heat exchange tube; a vibration mechanism connected to the inlet section and / or outlet section of the heat exchange tube, which can drive the heat exchange tube and make it vibrate relative to the shell, so as to make the cracked agglomerates fall off the heat exchange tube. The heat exchange device has a higher dust removal efficiency and a better dust removal effect, thereby improving the heat exchange efficiency and service life of the heat exchange device.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange device dust removal, and in particular relates to a heat exchange device and a method for removing agglomerates in the heat exchange device. Background Art

[0002] Heat exchange devices are devices that transfer part of the heat of hot fluid to cold fluid. Heat exchange devices play an important role in chemical, petroleum, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and flue gas waste heat recovery equipment, etc., and are widely used. Water or flue gas is often used as a hot fluid, which is very easy to agglomerate in the heat exchange device and affect the heat exchange effect of the heat exchange device.

[0003] In order to clean the heat exchange device, the prior art often equips the heat exchange device with at least one vibration mechanism, and uses the vibration mechanism to drive the heat exchange tube in the heat exchange device and vibrate it relative to the shell of the heat exchange device, and promotes the agglomerates attached to the heat tube to fission and fall off, thereby achieving the purpose of cleaning. However, although the existing heat exchange device can use the vibration mechanism to clean itself, it has the defects of low cleaning efficiency and poor cleaning effect. Summary of the invention

[0004] In order to solve all or part of the above problems, the purpose of the present invention is to provide a heat exchange device and a method for removing agglomerates in the heat exchange device, so as to solve the problems of low cleaning efficiency and poor cleaning effect of the heat exchange device, thereby improving the heat exchange efficiency and service life of the heat exchange device.

[0005] According to a first aspect of the present invention, there is provided a heat exchange device, comprising: a shell having an inlet capable of introducing a hot fluid and an outlet capable of releasing the hot fluid; a heat exchange tube comprising a heat exchange section arranged in the shell, an inlet section connected to one end of the heat exchange section and passing through the shell, and an outlet section connected to the other end of the heat exchange section and passing through the shell; an adjusting component connected to the inlet section and / or the outlet section of the heat exchange tube, which can repeatedly adjust the flow rate of the cold fluid in the heat exchange tube and make the heat exchange tube expand and contract under the heating action of the hot fluid, so as to induce fission of agglomerates attached to the heat exchange tube; a vibration mechanism connected to the inlet section and / or the outlet section of the heat exchange tube, which can drive the heat exchange tube and make it vibrate relative to the shell, so as to make the cracked agglomerates fall off the heat exchange tube.

[0006] Furthermore, the vibration mechanism includes a vibrator fixed on a selected surface of the shell and a transmission component for connecting the vibrator to the inlet section and / or outlet section of the heat exchange tube, wherein the inlet section and outlet section of the heat exchange tube pass through the selected surface, so that the vibrator drives the heat exchange tube to vibrate along the normal direction of the selected surface through the transmission component.

[0007] Furthermore, the heat exchange device also includes a first sealing structure arranged between the shell and the inlet section of the heat exchange tube and allowing the inlet section of the heat exchange tube to move along the normal direction of the selected surface, and a second sealing structure arranged between the shell and the outlet section of the heat exchange tube and allowing the outlet section of the heat exchange tube to move along the normal direction of the selected surface.

[0008] Furthermore, the regulating assembly also includes a first flexible pipe joint, a second flexible pipe joint, and a first pipeline passing through the first flexible pipe joint and the inlet section of the heat exchange tube, and a second pipeline passing through the second flexible pipe joint and the outlet section of the heat exchange tube, wherein at least one of the first pipeline and the second pipeline includes a flow regulating valve.

[0009] Furthermore, the second pipeline includes a temperature sensor, a pressure sensor and a flow sensor.

[0010] Furthermore, at least one of the first pipeline and the second pipeline further includes a shut-off valve.

[0011] Furthermore, the hot fluid is sintering flue gas, and the cold fluid is water or oil.

[0012] Furthermore, the heat exchange tube is made of a material with a linear expansion coefficient of 12*10-6m / °C to 14*10-6m / °C.

[0013] Furthermore, the heat exchange tube is made of stainless steel.

[0014] According to a second aspect of the present invention, there is provided a method for removing agglomerates in a heat exchange device, the steps of which include: repeatedly adjusting the flow velocity of a cold fluid in a heat exchange tube of the heat exchange device and causing the heat exchange tube to be heated by a hot fluid passing through a shell of the heat exchange device to expand and contract, thereby inducing fission of agglomerates attached to the heat exchange tube; driving the heat exchange tube and causing it to vibrate relative to the shell of the heat exchange device, thereby causing the cracked agglomerates to fall off the heat exchange tube.

[0015] According to the heat exchange device and the method for removing agglomerates in the heat exchange device described in various aspects of the present invention, it is possible to repeatedly adjust the flow rate of the cold fluid in the heat exchange tube and make the heat exchange tube expand and contract under the heating action of the hot fluid, so as to induce the fission of the agglomerates attached to the heat exchange tube, and then drive the heat exchange tube to vibrate relative to the shell, so as to make the cracked agglomerates fall off the heat exchange tube, thereby achieving the purpose of cleaning. Since the present invention uses the principle of thermal expansion and contraction to promote the cracking of agglomerates on the basis of vibration cleaning, compared with the traditional single vibration cleaning, the heat exchange device and the method for removing agglomerates in the heat exchange device described in various aspects of the present invention have higher cleaning efficiency and better cleaning effect, thereby effectively improving the heat exchange efficiency and service life of the heat exchange device. Among them, the heat exchange device has a simple structure, is easy to assemble, is safe and reliable to use, and is easy to implement and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 Schematic diagram of the structure of a heat exchange device according to an embodiment of the present invention.

[0018] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 FIG. 1 is a schematic diagram of the structure of a heat exchange device according to an embodiment of the present invention. Figure 1As shown, the heat exchange device is a device that transfers part of the heat of the hot fluid to the cold fluid. The hot fluid is preferably sintering flue gas, and the cold fluid is preferably water or oil. Since the sintering flue gas contains water and dust, it is very easy to produce agglomerates in the heat exchange device. The heat exchange device includes a shell 1, a heat exchange tube 2, an adjustment component (including at least a flow control valve 414) and a vibration mechanism (including at least a vibrator 3). The shell 1 has an inlet for introducing hot fluid and an outlet for releasing hot fluid. The heat exchange tube 2 includes a heat exchange section 21 arranged in the shell 1, an inlet section 22 connected to one end of the heat exchange section 21 and passing through the shell 1, and an outlet section 23 connected to the other end of the heat exchange section 21 and passing through the shell 1. The adjustment component is connected to the inlet section 22 and / or the outlet section 23 of the heat exchange tube 2, which can repeatedly adjust the flow rate of the cold fluid in the heat exchange tube 2 and make the heat exchange tube 2 expand and contract under the heating action of the hot fluid, so as to cause the agglomerates attached to the heat exchange tube 2 to fission. The vibration mechanism is connected to the inlet section 22 and / or the outlet section 23 of the heat exchange tube 2, and can drive the heat exchange tube 2 to vibrate relative to the shell 1, so that the cracked agglomerates fall off the heat exchange tube 2. Since the heat exchange device uses the principle of thermal expansion and contraction to promote the cracking of agglomerates on the basis of vibration cleaning, it has higher cleaning efficiency and better cleaning effect compared with the traditional single vibration cleaning, thereby improving the heat exchange efficiency and service life of the heat exchange device. In addition, the heat exchange device has a simple structure, is easy to assemble, and is safe and reliable to use, which is convenient for implementation and promotion.

[0021] It should be noted that although Figure 1 The illustrated embodiment shows only one heat exchange tube 2, one adjustment component and one vibration mechanism, but in fact the embodiment may also include N heat exchange tubes 2, N adjustment components and N vibration mechanisms, so that each heat exchange tube 2 has an adjustment component used therewith and a vibration mechanism used therewith, wherein the value of N is a positive integer greater than or equal to 2.

[0022] In this embodiment, the vibration mechanism includes a vibrator 3 fixed on a selected surface of the shell 1 and a transmission member 31 for connecting the vibrator 3 to the inlet section 22 and / or outlet section 23 of the heat exchange tube 2, wherein the inlet section 22 and the outlet section 23 of the heat exchange tube 2 pass through the selected surface, so that the vibrator 3 drives the heat exchange tube 2 to vibrate along the normal direction of the selected surface through the transmission member 31, thereby causing the cracked agglomerates to fall off the heat exchange tube 2. Among them, the vibrator 3 can be an electromagnetic vibrator, an eccentric vibrator or an air vibrator. The transmission member 31 is preferably a rod, the two ends of the rod are respectively fixed to the inlet section 22 and the outlet section 23 of the heat exchange tube 2, and the middle part is connected to the vibrator, so that it drives the heat exchange tube 2 to vibrate along the normal direction of the selected surface through the rod. Among them, the selected surface is not limited, but it is recommended to be preferably a flat top surface or a flat side surface of the shell.

[0023] In this embodiment, the heat exchange device further includes a first sealing structure 24 disposed between the shell 1 and the inlet section 22 of the heat exchange tube 2 and allowing the inlet section 22 of the heat exchange tube 2 to move along the normal direction of the selected surface, and a second sealing structure 25 disposed between the shell 1 and the outlet section 23 of the heat exchange tube 2 and allowing the outlet section 23 of the heat exchange tube 2 to move along the normal direction of the selected surface. The first sealing structure 24 and the second sealing structure 25 can prevent leakage at the joint between the shell 1 and the heat exchange tube 2. The first sealing structure 24 and the second sealing structure 25 can be selected as a high temperature resistant sealing ring, or a high temperature resistant rope or cloth wound around the heat exchange tube 2 and fixed to the shell.

[0024] In this embodiment, the regulating assembly further includes a first flexible pipe joint 421, a second flexible pipe joint 422, and a first pipeline passing through the first flexible pipe joint 421 and the inlet section 22 of the heat exchange tube 2, and a second pipeline passing through the second flexible pipe joint 422 and the outlet section 23 of the heat exchange tube 2, wherein at least one of the first pipeline and the second pipeline includes a flow regulating valve 414. The flow regulating valve 414 is used to repeatedly adjust the flow rate of the cold fluid in the heat exchange tube 2. The first flexible pipe joint 421 and the second flexible pipe joint 422 can prevent the first pipeline and the second pipeline from being driven by the vibrator 3 to generate strong vibrations, so as to prevent the vibrator 3 from adversely affecting the flow regulating valve 414 and the equipment connected to the first pipeline and the second pipeline. The first flexible pipe joint 421 and the second flexible pipe joint 422 are preferably resin hoses, rubber hoses or metal hoses (such as pipe fittings for water heater sprinkler heads).

[0025] In this embodiment, the second pipeline includes a temperature sensor 413, a pressure sensor 411 and / or a flow sensor 412. The temperature, pressure and flow rate of the cold fluid in the heat exchange tube 21 can be obtained by the temperature sensor 413, the pressure sensor 411 and the flow sensor 412, so that the heat exchange efficiency of the heat exchange device can be evaluated, and then it is determined whether to start the dust cleaning. Preferably, the heat exchange device also includes a control module connected to the temperature sensor 413, the pressure sensor 411, the flow sensor 412, the vibrator 3 and the switch flow regulating valve 414, and the control module can calculate the heat exchange efficiency of the heat exchange device according to the detection results of the temperature sensor 413, the pressure sensor 411 and the flow sensor 412, and then repeatedly switch the flow regulating valve 414 when the heat exchange efficiency is lower than the rated heat exchange efficiency of 75%-85% (preferably 80%) and start the vibrator 3 at the same time or with a delay to perform the dust cleaning operation on the heat exchange device. Among them, the control module mainly includes a programmable logic control component (such as a PLC or a CPU), a memory, and electronic components connected to the programmable logic control component, etc., which are well known to those skilled in the art and will not be described in detail here.

[0026] In this embodiment, at least one of the first pipeline and the second pipeline further includes a shut-off valve 415 so as to close the heat exchange tube 2 when necessary.

[0027] In this embodiment, the hot fluid is selected as sintering flue gas, the cold fluid is selected as water or oil, and the heat exchange tube 2 is made of a linear expansion coefficient of 12*10 -6 m / ℃~14*10 -6 m / ℃ material. After a large number of experiments, it has been verified that when the hot fluid is sintering flue gas and the cold fluid is water or oil, the heat exchange tube 2 made of the material with this linear expansion coefficient can do strong expansion and contraction movement under the heating effect of the hot fluid, which promotes the intensive fission of the agglomerates attached to the heat exchange tube 2. Among them, the material of the heat exchange tube is stainless steel to reduce the adhesion of the agglomerates and increase the cleaning effect.

[0028] In an embodiment not shown, a method for removing agglomerates in a heat exchange device is provided. The steps of the method include: repeatedly adjusting the flow rate of the cold fluid in the heat exchange tube of the heat exchange device and causing the heat exchange tube to be heated by the hot fluid passing through the shell of the heat exchange device to expand and contract, so as to induce fission of agglomerates attached to the heat exchange tube; driving the heat exchange tube and vibrating it relative to the shell of the heat exchange device, so as to cause the cracked agglomerates to fall off the heat exchange tube. The heat exchange device can be selected as the heat exchange device mentioned in the above embodiment. This method uses the principle of thermal expansion and contraction to promote the cracking of agglomerates on the basis of vibration cleaning, so compared with the traditional single vibration cleaning, it has higher cleaning efficiency and better cleaning effect, thereby improving the heat exchange efficiency and service life of the heat exchange device.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician in the field can easily make changes or variations within the technical scope disclosed in the present invention, and such changes or variations should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A heat exchange device, characterized in that: include: a housing having an inlet capable of introducing a hot fluid and an outlet capable of releasing the hot fluid; The heat exchange tube comprises a heat exchange section arranged in the shell, an inlet section connected to one end of the heat exchange section and passing through the shell, and an outlet section connected to the other end of the heat exchange section and passing through the shell; A regulating assembly connected to the inlet section and / or outlet section of the heat exchange tube, which can repeatedly adjust the flow rate of the cold fluid in the heat exchange tube and make the heat exchange tube expand and contract under the heating effect of the hot fluid, so as to induce fission of the agglomerates attached to the heat exchange tube; a vibration mechanism connected to the inlet section and / or the outlet section of the heat exchange tube, capable of driving the heat exchange tube and causing it to vibrate relative to the shell, so that the cracked agglomerates fall off the heat exchange tube; The vibration mechanism comprises a vibrator fixedly mounted on a selected surface of the shell and a transmission member for connecting the vibrator to an inlet section and / or an outlet section of the heat exchange tube, wherein the inlet section and the outlet section of the heat exchange tube pass through the selected surface, and a middle portion of the transmission member is connected to the vibrator, so that the vibrator drives the heat exchange tube to vibrate along a normal direction of the selected surface through the transmission member; and the selected surface is a flat top surface or a flat side surface of the shell; and The regulating assembly also includes a first flexible pipe joint, a second flexible pipe joint, and a first pipeline passing through the first flexible pipe joint and the inlet section of the heat exchange tube, and a second pipeline passing through the second flexible pipe joint and the outlet section of the heat exchange tube, wherein at least one of the first pipeline and the second pipeline includes a flow regulating valve; and the transmission component is respectively connected to the first flexible pipe joint and the second flexible pipe joint to prevent the first pipeline and the second pipeline from being driven by the vibrator to generate strong vibrations.

2. The heat exchange device according to claim 1, characterized in that: It also includes a first sealing structure arranged between the shell and the inlet section of the heat exchange tube and allowing the inlet section of the heat exchange tube to move along the normal direction of the selected surface, and a second sealing structure arranged between the shell and the outlet section of the heat exchange tube and allowing the outlet section of the heat exchange tube to move along the normal direction of the selected surface.

3. The heat exchange device according to claim 1, characterized in that: The second pipeline includes a temperature sensor, a pressure sensor and a flow sensor.

4. The heat exchange device according to claim 1, characterized in that: At least one of the first pipeline and the second pipeline further includes a shut-off valve.

5. The heat exchange device according to any one of claims 1 to 4, characterized in that: The hot fluid is sintering flue gas, and the cold fluid is water or oil.

6. The heat exchange device according to claim 5, characterized in that: The heat exchange tube has a linear expansion coefficient of 12*10 -6 m / ℃~14*10 -6 m / ℃ material.

7. The heat exchange device according to claim 6, characterized in that: The heat exchange tube is made of stainless steel.

8. A method for removing agglomerates in a heat exchange device, applied to the heat exchange device as claimed in claim 1, characterized in that: The steps include: The regulating assembly is used to repeatedly adjust the flow velocity of the cold fluid in the heat exchange tube of the heat exchange device, so that the heat exchange tube is heated by the hot fluid passing through the shell of the heat exchange device to expand and contract, thereby inducing fission of the agglomerates attached to the heat exchange tube; The vibration mechanism is used to drive the heat exchange tube and make it vibrate relative to the shell of the heat exchange device, so that the cracked agglomerates fall off the heat exchange tube.

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