Multi-tube condenser
By inserting a spiral guide and a conical tube into the condenser pipe fittings, the condensate water and fine powder are taken away by centrifugation, the problem of reducing heat transfer efficiency caused by exhaust gas condensation is solved and efficient heat recovery is achieved.
Patent Information
- Application Number
- CN202421172218.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the condensation process of the exhaust gas in the drying system, the condensation water hangs on the wall, adsorbs fine powder, and reduces the heat transfer efficiency of the condenser. The heat transfer efficiency decreases and requires frequent cleaning, which affects heat recovery.
Design a multi-tube condenser with built-in spiral guide plates for the pipe fittings to take away condensate and fine powder by centrifugation, and further increase the gas flow rate through the conical tube to ensure that the water vapor is converted into liquid water and release latent heat, and improve the Heat exchange efficiency.
It effectively avoids fine powder wall hanging, improves the heat transfer efficiency of the condenser, reduces the cleaning frequency, and ensures efficient heat recovery.
Smart Images
Figure CN222352930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tail gas treatment and heat energy recovery, in particular to a multi-tube condenser. Background Art
[0002] The condenser is a type of heat exchanger that can convert gas or vapor into liquid, release the heat energy of the gas or vapor and transfer it to the air or other media.
[0003] The working process of the condenser is an exothermic process. Usually, the tail gas in the drying system will be discharged after heat recovery by the condenser. For the tail gas that is not hygroscopic, a part of the heat can be recovered by using a shell-and-tube heat exchanger, a plate heat exchanger, etc. However, the tail gas in the drying system has the characteristics of high temperature, high humidity, and mixed fine powder. When too much heat is recovered, the water vapor in the tail gas will condense, and the condensed water hanging on the wall will absorb the fine powder, resulting in a decrease in the heat transfer efficiency of the condenser. If you want to maintain the heat transfer efficiency, you need to frequently clean the inner wall of the condenser. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a multi-tube condenser.
[0005] According to the multi-tube condenser proposed by the utility model, it includes a box body for passing a cold medium, and pipes placed in the box body for passing a hot medium. The hot medium in the pipes can complete heat exchange with the cold medium in the box body. Usually, the multi-tube condenser is used for condensing gas containing water vapor. The condensed water generated during the heat exchange process is discharged under the action of gravity, and the gas escapes upward. The cold medium is usually air.
[0006] The difference between this condenser and the traditional condenser is that: the pipe is built with a spiral guide vane, so that when the heat medium passes through the pipe, it is guided by the guide vane in a spiral shape, that is, the gas rotates centrifugally under the action of the guide vane, generating a spiral path. In the subsequent heat exchange process, the centrifugal action can be used to carry away the condensed water and mixed fine powder hanging on the wall of the device, thereby avoiding the reduction of heat transfer efficiency caused by fine powder hanging on the wall; in addition, there is no need to worry about the condensation of water vapor, and the latent heat released by converting water vapor into liquid water can be recovered.
[0007] In some examples of the present invention, the pipe fitting includes a pipe fitting body and a conical tube connected to the lower end of the pipe fitting body. The conical tube shrinks from an end close to the pipe fitting body to an end away from the pipe fitting body and opens at an end away from the pipe fitting body, so that the heat medium passing through the pipe fitting body passes through the conical tube again; that is, the gas enters the conical tube after obtaining centrifugal force, fully contacts the conical tube and starts heat exchange, and the conical structure can further give the gas force, thereby increasing the flow rate of the gas, and the condensed water and fine powder hanging on the wall can be fully taken away.
[0008] In some examples of the utility model, the pipe fitting includes a core tube arranged in the pipe fitting body, both ends of the core tube are open, and the core tube is arranged along the extension direction of the pipe fitting body, so that the gas in the heat medium can be discharged through the core tube after heat exchange, and the condensed water generated after the gas absorbs heat can be discharged by gravity, and the water vapor in the gas escapes and is discharged freely upward, and the core tube is used to guide the gas after heat exchange to be discharged.
[0009] In some examples of the present invention, the inner side of the guide plate is sealed to the outer wall of the core tube, and the outer side is sealed to the inner wall of the pipe body, so that a spiral channel for the heating medium to pass through is formed between the inner wall of the pipe body, the outer wall of the core tube, and the guide plate, that is, the spiral channel is separated from the core tube, and the two are in different channels.
[0010] In some examples of the present invention, a first partition is provided in the box body to divide the box body into a heat exchange area, the pipe fitting is placed in the heat exchange area, and a sealed connection is formed between the outer wall of the pipe fitting and the heat exchange area, so that the input end and the output end of the pipe fitting are exposed outside the heat exchange area, that is, the pipe fitting is placed in the heat exchange area, and a cold medium is passed into the heat exchange area, so that heat exchange between the cold and hot media can be achieved, and the input end and the output end of the pipe fitting need to be exposed outside the heat exchange area so that the hot medium can be continuously passed into the pipe fitting.
[0011] In some examples of the present invention, a cold medium inlet and a cold medium outlet are provided on a wall surface of the heat exchange area of the box.
[0012] In some examples of the present invention, blades for increasing the heat exchange area are arranged on the outer wall of the pipe.
[0013] In some examples of the utility model, a second partition is further provided in the box body to divide the box body into a heat medium entrance area, the heat exchange area and the heat medium entrance area are closed to each other, the input end of the pipe fitting is exposed in the heat medium entrance area, and the condensed water output end of the pipe fitting is connected to the drainage box outside the box body; there are several pipe fittings in the heat exchanger, and the heat medium entrance area is designed on the box body to facilitate the passage of the heat medium, that is, when the heat medium fills the heat medium entrance area, all pipe fittings can pass the heat medium.
[0014] In some examples of the utility model, a gas exhaust area which is respectively closed to the heat exchange area and the heat medium entry area is formed in the box body, and the gas output end of the pipe is exposed in the gas exhaust area; if the output ends of several pipes are exposed to the gas exhaust area, the gas after heat exchange can be discharged uniformly.
[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 This is a structural schematic diagram of a multi-tube condenser in an embodiment of the utility model;
[0018] Figure 2 This is a schematic diagram of the structure of a single pipe in an embodiment of the utility model;
[0019] Figure 3 It is a front view of the first partition in the embodiment of the utility model;
[0020] Figure 4 It is a front view of the second partition in the embodiment of the utility model.
[0021] Description of reference numerals:
[0022] Pipe fitting 1, guide vane 11, tapered pipe 12, core pipe 13, pipe fitting body 14, blades 15;
[0023] Box body 2, first baffle 21, first through hole 211, second baffle 22, second through hole 221, heat exchange area a, cold medium inlet a1, cold medium outlet a2, tail gas inlet area b, hot medium inlet b1, gas discharge area c, gas outlet c1;
[0024] Drain tank 3. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.
[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.
[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0029] Please refer to the following Figure 1 ~Attached Figure 4 The multi-tube condenser provided in the embodiment of the utility model is described.
[0030] For details, please refer to the attached Figure 1The multi-tube condenser includes a box body 2 for passing a cold medium, which is usually air, and a plurality of pipes 1 placed in the box body 2 for passing a hot medium, which is usually exhaust gas discharged from a drying system. The exhaust gas in the pipes 1 can complete heat exchange with the air in the box body 2, so that the heat energy in the exhaust gas can be recovered and then discharged to achieve heat energy recovery and utilization.
[0031] Please refer to Figure 2 As shown, the pipe fitting 1 includes a pipe fitting body 14, which is a basically cylindrical structure with openings at both ends. A spiral guide plate 11 is arranged inside the pipe fitting, so that when the exhaust gas passes through the pipe fitting, it is guided by the guide plate 11 in a spiral shape, that is, the exhaust gas can obtain centrifugal force in the pipe fitting 1, thereby taking away the condensed water hanging on the wall and the fine powder in the condensed water during the heat exchange process.
[0032] Please continue to refer to Figure 2 As shown, the pipe fitting 1 includes a tapered tube 12 connected at its lower end. The tapered tube 12 is conical, and its open end is welded to an opening at one end of the pipe fitting body 14. The tapered tube 12 shrinks from an end close to the pipe fitting body 14 to an end away from the pipe fitting body 14, and opens at an end away from the pipe fitting body 14, so that the exhaust gas passing through the pipe fitting body 14 passes through the tapered tube 12 again. When the exhaust gas passes through the tapered tube 12, the condensed water and fine powder are continuously taken away by the action of centrifugal force, and are discharged at the open end of the tapered tube 12, that is, the open end of the tapered tube 12 is the condensed water output end of the pipe fitting 1.
[0033] Please continue to refer to Figure 2 As shown, the pipe 1 includes a core tube 13 disposed in a pipe body 14. Both ends of the core tube 13 are open and arranged along the extension direction of the pipe body 14, so that the gas in the exhaust gas can be discharged through the core tube 13 after heat exchange;
[0034] Specifically, the core tube 13 is also a cylindrical tube, and its diameter is smaller than the pipe body 14. It is installed in the pipe body 14 and is coaxial with the pipe body 14, so that a gap is left between the outer wall of the core tube 13 and the inner wall of the pipe body 14, and the guide plate 11 is installed in the gap; wherein the inner side of the guide plate 11 is sealed with the outer wall of the core tube 13, and the outer side is sealed with the inner wall of the pipe body 14, so that a spiral channel for the exhaust gas to pass through is formed between the inner wall of the pipe body 14, the outer wall of the core tube 13, and the guide plate 11, and the exhaust gas can be formed into a spiral shape under the guidance of the spiral channel;
[0035] Please continue to refer to Figure 2As shown, the upper end of the guide plate 11 is flush with the upper end of the pipe body 14, so that the upper end of the guide plate 11 remains open in the gap between the core tube 13 and the pipe body 14, which serves as the input end of the pipe, that is, the exhaust gas can enter the pipe 1 here; and the upper end of the core tube 13 is far beyond the upper end of the pipe body 14. The purpose of such design is that the core tube 13 contains the gas discharged after heat exchange, so the discharged gas will not be mixed with the input exhaust gas. In this way, the upper end of the core tube 13 serves as the gas output end of the pipe 1.
[0036] Please continue to refer to Figure 1 As shown, a first partition 21 and a second partition 22 are provided in the box body 2. The first partition 21 and the second partition 22 are arranged from bottom to top along the longitudinal direction of the box body 2, dividing the box body 2 into three areas;
[0037] The first partition 21 divides the box into a heat exchange area a, the pipe 1 is placed in the heat exchange area a, and a sealed connection is formed between the outer wall of the pipe 1 and the heat exchange area a, so that the input end and the output end of the pipe 1 are exposed outside the heat exchange area a;
[0038] Specifically, Figure 3 As shown, it is a front view of the first partition 21, and a plurality of first through holes 211 are opened on the first partition 21. The upper end opening of the pipe body 14 corresponds to the first through holes 211 on the first partition 21 and is welded to limit the outer wall of the pipe body 14 to the lower end of the first partition 21, and the lower end opening of the conical tube 12 extends out of the box body 2, and the lower ends of the plurality of conical tubes 12 are connected to the drainage box 3 outside the box body 2, and the condensed water is collected and discharged through the drainage box 3.
[0039] Please continue to refer to Figure 1 As shown, the box body 2 is provided with a cold medium inlet a1 and a cold medium outlet a2 on the wall surface of the heat exchange area a, so as to facilitate the inflow and outflow of cold air.
[0040] Please continue to refer to Figure 1 As shown, blades 15 for increasing the heat exchange area are provided on the outer wall of the pipe 1. Specifically, the blades 15 are spiral blades welded on the outer wall of the tapered tube 12 and located in the heat exchange area a to increase the heat exchange area between the pipe 1 and the air.
[0041] Please continue to refer to Figure 1 As shown, an exhaust gas inlet area b is separated between the first partition 21 and the second partition 22, the heat exchange area a and the exhaust gas inlet area b are sealed with each other, and the input end of the pipe 1 is exposed in the exhaust gas inlet area;
[0042] Specifically, the upper end of the pipe body 14 is exposed in the exhaust gas inlet area b, and the box body 2 is provided with a heat medium inlet b1 on the wall surface of the heat medium inlet area b. The exhaust gas enters the exhaust gas inlet area b from the heat medium inlet b1 and then enters the multiple pipes 1.
[0043] Please continue to refer to Figure 1 As shown, the box body 2 is further divided into a gas discharge area c by the second partition plate 22, the heat exchange area a and the exhaust gas inlet area b are both sealed with the gas discharge area c, and the gas output end of the pipe 1 is exposed in the gas discharge area c;
[0044] Specifically, the upper end of the core tube 13 continues to extend through the tail gas inlet area b to the gas outlet area c. Figure 4 As shown, the second partition plate 22 is provided with a plurality of second through holes 221, and the core tube 13 passes through the second through holes 221, and the outer wall of the core tube 13 is welded to the through holes, so that the core tube 13 is placed in the gas discharge area c;
[0045] Please continue to refer to Figure 1 As shown, the box body 2 is further provided with a gas outlet c1 on the wall surface of the gas discharge area c, and the exhaust gas after heat exchange can be gathered in the gas discharge area c and then all discharged through the gas outlet c1.
[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0047] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A multi-tube condenser, comprising a box for passing a cold medium, and a pipe placed in the box for passing a hot medium, wherein the hot medium in the pipe can complete heat exchange with the cold medium in the box, characterized in that: The pipe is internally provided with a spiral guide plate, so that when the heat medium passes through the pipe, it is guided by the guide plate in a spiral shape.
2. A multi-tube condenser according to claim 1, characterized in that: The pipe fitting includes a pipe fitting body and a tapered tube connected to the lower end of the pipe fitting body. The tapered tube shrinks from an end close to the pipe fitting body to an end away from the pipe fitting body and opens at an end away from the pipe fitting body, so that the heat medium passing through the pipe fitting body passes through the tapered tube again.
3. A multi-tube condenser according to claim 2, characterized in that: The pipe comprises a core tube arranged in the pipe body, both ends of the core tube are open, and the core tube is arranged along the extension direction of the pipe body, so that the gas in the heat medium can be discharged through the core tube after heat exchange.
4. A multi-tube condenser according to claim 3, characterized in that: The inner side of the guide plate is sealed to the outer wall of the core tube, and the outer side is sealed to the inner wall of the pipe body, so that a spiral channel for the heat medium to pass through is formed among the inner wall of the pipe body, the outer wall of the core tube and the guide plate.
5. A multi-tube condenser according to any one of claims 1 to 4, characterized in that: A first partition is provided in the box body to divide the box body into a heat exchange area. The pipe is placed in the heat exchange area, and a sealed connection is formed between the outer wall of the pipe and the heat exchange area, so that the input end and the output end of the pipe are exposed outside the heat exchange area.
6. A multi-tube condenser according to claim 5, characterized in that: The box body is provided with a cold medium inlet and a cold medium outlet on the wall surface of the heat exchange area.
7. The multi-tube condenser according to claim 5, characterized in that: The outer wall of the pipe is provided with blades for increasing the heat exchange area.
8. The multi-tube condenser according to claim 5, characterized in that: A second partition is also provided in the box body to divide the box body into a heat medium entrance area, the heat exchange area and the heat medium entrance area are closed to each other, the input end of the pipe is exposed in the heat medium entrance area, and the condensate output end of the pipe is connected to the drainage box outside the box.
9. A multi-tube condenser according to claim 8, characterized in that: A gas discharge area which is respectively sealed from the heat exchange area and the heat medium inlet area is also formed in the box body, and the gas output end of the pipe is exposed in the gas discharge area.