CN107270749A - The staged helical baffles and its heat exchanger of a kind of longitudinal closure plate of band - Google Patents
The staged helical baffles and its heat exchanger of a kind of longitudinal closure plate of band Download PDFInfo
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
- F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
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Abstract
本发明涉及一种带纵向堵板的阶梯式螺旋折流板及其换热器，在一个换热器螺旋周期壳程内，包括：四块垂直于换热管束轴向且互不连接的直角扇形折流板，所述直角扇形折流板依次与其相邻的前一片所述直角扇形折流板绕换热管束中心轴向旋转90°，相邻直角扇形折流板之间通过堵板连接，在换热器的壳程形成阶梯状螺旋流道。本发明能够在换热器的壳程形成近似螺旋流道，降低换热器壳程压力损失，具有较高的综合换热性能；同时，简化了折流板的加工及壳程内部结构，与普通的搭接式螺旋折流板相比，加工及装配方面更为简便。
The invention relates to a stepped spiral baffle plate with a longitudinal blocking plate and a heat exchanger thereof. In a spiral periodic shell side of the heat exchanger, it includes: four right-angled plates perpendicular to the axial direction of the heat exchange tube bundle and not connected to each other. Fan-shaped baffles, the right-angled fan-shaped baffles are sequentially rotated 90° around the center of the heat exchange tube bundle with the adjacent right-angled fan-shaped baffles in turn, and the adjacent right-angled fan-shaped baffles are connected by blocking plates , forming a stepped spiral flow channel on the shell side of the heat exchanger. The invention can form an approximate spiral flow channel on the shell side of the heat exchanger, reduce the pressure loss on the shell side of the heat exchanger, and have high comprehensive heat exchange performance; meanwhile, it simplifies the processing of the baffle plate and the internal structure of the shell side, which is compatible with Compared with ordinary lapped spiral baffles, it is easier to process and assemble.
Description
技术领域technical field
本发明属于换热器的技术领域，特别是涉及一种带纵向堵板的阶梯式螺旋折流板及其换热器。The invention belongs to the technical field of heat exchangers, in particular to a stepped spiral baffle with a longitudinal blocking plate and a heat exchanger thereof.
背景技术Background technique
换热器作为通用设备，广泛应用于化工、电力、石油、冶金、制冷及动力生产等领域及集中供热系统，既是重要的工艺设备，也是余热回收装置。其中，管壳式换热器所占比重较高。As general-purpose equipment, heat exchangers are widely used in chemical industry, electric power, petroleum, metallurgy, refrigeration and power production and central heating systems. They are not only important process equipment, but also waste heat recovery devices. Among them, shell and tube heat exchangers account for a relatively high proportion.
在管壳式换热器内，换热管与折流板或折流杆等共同构成了壳程流道。换热管是基本传热元件，折流板的作用是改变壳程流体的流动方向，使冷、热介质充分换热；同时起到支撑管束的作用，防止流体诱导管束振动产生的破坏。长期以来，管壳式换热器的壳程流体流动和换热特性一直是研究的热点和难点。In a shell-and-tube heat exchanger, heat exchange tubes and baffles or baffle rods together form a shell-side flow path. The heat exchange tube is the basic heat transfer element, and the function of the baffle is to change the flow direction of the shell-side fluid, so that the cold and hot media can fully exchange heat; at the same time, it plays the role of supporting the tube bundle to prevent damage caused by the fluid-induced vibration of the tube bundle. For a long time, the shell-side fluid flow and heat transfer characteristics of shell-and-tube heat exchangers have been a hot and difficult research point.
换热器中传统的折流板形式是弓形折流板，如图1所示，弓形折流板是管壳式换热器中应用最广泛、技术最成熟的一种折流板形式。弓形折流板结构如图1(a)所示，弓形折流板的安装方式如图1(b)所示。弓形折流板换热器具有换热系数高，制造装配简便等特点。由于壳程流体流动方向变化频繁，呈Z字形流动，如图2所示，使壳程形成剧烈的湍流，具有较高的换热系数，但也造成了壳程流体压力损失偏高，泵功负荷消耗大，存在流动死区等不足。与此同时，壳程内相邻的折流板间流体垂直冲刷管束，流体诱导管束振动破坏，影响着换热器设备安全运行。特别是，对于壳程流体介质粘度较高时，以上的不足更为明显。螺旋折流板换热器出现于20世纪80年代，如图3所示，采用沿壳体轴线展开的螺旋形折流板结构，使壳程流体呈螺旋状流动。它的出现很大程度上解决了弓形折流板的某些不足。例如：在保证换热器具有较高换热系数的同时，壳程流体压力损失明显减小，消除了流动死区，综合换热性能(单位压降下的换热系数)得到提升。然而，螺旋折流板换热器同样也有某些不足。如图3(a)所示的为连续螺旋折流板的结构，由于连续的螺旋曲面加工困难，目前的螺旋折流板换热器多为搭接式的不连续螺旋折流板换热器，其中非连续螺旋折流板结构如图3(b)所示。此外，无论连续螺旋折流板或非连续螺旋折流板，由于折流板与换热器壳程轴向存在一定的夹角，这给折流板的加工、钻孔，以及换热管与折流板的装配带来一定的难度。The traditional form of baffles in heat exchangers is bow baffles. As shown in Figure 1, bow baffles are the most widely used and most mature form of baffles in shell and tube heat exchangers. The structure of the bow-shaped baffle is shown in Figure 1(a), and the installation method of the bow-shaped baffle is shown in Figure 1(b). The bow-shaped baffle heat exchanger has the characteristics of high heat transfer coefficient and easy manufacturing and assembly. Because the flow direction of the shell-side fluid changes frequently, it is a zigzag flow, as shown in Figure 2, which makes the shell-side form a severe turbulent flow, which has a high heat transfer coefficient, but also causes a relatively high pressure loss of the shell-side fluid, and the pump power The load consumption is large, and there are deficiencies such as flow dead zone. At the same time, the fluid between the adjacent baffles in the shell side scours the tube bundle vertically, and the fluid induces the vibration and damage of the tube bundle, which affects the safe operation of the heat exchanger equipment. Especially, when the viscosity of the shell-side fluid medium is high, the above disadvantages are more obvious. The spiral baffle heat exchanger appeared in the 1980s. As shown in Figure 3, a spiral baffle structure is adopted along the axis of the shell to make the shell side fluid flow in a spiral shape. Its appearance largely solves some shortcomings of bow baffles. For example: while ensuring that the heat exchanger has a high heat transfer coefficient, the shell side fluid pressure loss is significantly reduced, the flow dead zone is eliminated, and the comprehensive heat transfer performance (heat transfer coefficient under unit pressure drop) is improved. However, the spiral baffle heat exchanger also has some disadvantages. As shown in Figure 3(a), it is a continuous spiral baffle structure. Due to the difficulty in processing continuous spiral curved surfaces, most of the current spiral baffle heat exchangers are lap-joint discontinuous spiral baffle heat exchangers. , where the discontinuous helical baffle structure is shown in Figure 3(b). In addition, regardless of continuous spiral baffles or discontinuous spiral baffles, since there is a certain angle between the baffles and the axial direction of the shell side of the heat exchanger, it is difficult for the processing, drilling, and The assembly of the baffle brings certain difficulties.
综上所述，现有技术中对于如何解决管壳式换热器中壳程压力损失、综合换热性能与制造装配简便性之间互为矛盾的问题，尚缺乏有效的解决方案。To sum up, in the prior art, there is still no effective solution for how to solve the contradiction between the shell-side pressure loss, the comprehensive heat transfer performance and the simplicity of manufacturing and assembly in the shell-and-tube heat exchanger.
发明内容Contents of the invention
本发明为了解决上述问题，提供一种带纵向堵板的阶梯式螺旋折流板及其换热器。本发明能够在换热器的壳程形成近似螺旋流道，降低换热器壳程压力损失，具有较高的综合换热性能；同时，简化了折流板的加工及壳程内部结构，与普通的搭接式螺旋折流板相比，加工及装配方面更为简便。In order to solve the above problems, the present invention provides a stepped spiral baffle with a longitudinal blocking plate and a heat exchanger thereof. The invention can form an approximate spiral flow channel on the shell side of the heat exchanger, reduce the pressure loss on the shell side of the heat exchanger, and have high comprehensive heat exchange performance; meanwhile, it simplifies the processing of the baffle plate and the internal structure of the shell side, which is compatible with Compared with ordinary lapped spiral baffles, it is easier to process and assemble.
为了实现上述目的，本发明采用如下一种技术方案：In order to achieve the above object, the present invention adopts the following technical scheme:
一种带纵向堵板的阶梯式螺旋折流板，在换热器壳程一个螺旋周期内包括：四块垂直于换热管束轴向且互不连接的直角扇形折流板，所述直角扇形折流板依次与其相邻的前一片所述直角扇形折流板绕换热管束中心轴向旋转90°，相邻直角扇形折流板之间通过纵向堵板连接，在换热器的壳程形成阶梯状螺旋流道。A stepped spiral baffle with a longitudinal blocking plate, which includes: four right-angle fan-shaped baffles perpendicular to the axial direction of the heat exchange tube bundle and not connected to each other in one spiral cycle on the shell side of the heat exchanger, the right-angle fan-shaped The baffles are sequentially rotated 90° around the center of the heat exchange tube bundle with the preceding right-angled fan-shaped baffles adjacent to each other, and the adjacent right-angled fan-shaped baffles are connected by longitudinal blocking plates. A stepped spiral flow channel is formed.
进一步的，所述直角扇形折流板之间互相平行，所述直角扇形折流板的圆心角为90°。Further, the right-angle fan-shaped baffles are parallel to each other, and the central angle of the right-angle fan-shaped baffles is 90°.
进一步的，在一个换热器螺旋周期壳程内，所述堵板的数量设置为三个，所述堵板采用矩形薄板，所述堵板与所述直角扇形折流板垂直，所述堵板的轴向跨度等于1/4周期的螺距。Further, in a spiral periodic shell side of a heat exchanger, the number of the blocking plates is set to three, the blocking plates are rectangular thin plates, the blocking plates are perpendicular to the right-angle fan-shaped baffles, and the blocking plates are The axial span of the plate is equal to 1/4 period of the pitch.
所述堵板防止所述直角扇形折流板板间流体流动短路，形成类似螺旋形的流体通道，使壳侧流体按照螺旋状流动，减小流动阻力损失。The blocking plate prevents the short circuit of the fluid flow between the right-angle fan-shaped baffle plates, forms a similar spiral fluid channel, makes the shell side fluid flow in a spiral shape, and reduces the loss of flow resistance.
进一步的，四块直角扇形折流板由一块圆形板材切割形成。Further, the four right-angle fan-shaped baffles are formed by cutting a circular plate.
进一步的，四块直角扇形折流板之间的间距根据设计需要改变。Further, the spacing between the four right-angle fan-shaped baffles can be changed according to design requirements.
进一步的，所述堵板和所述直角扇形折流板之间采用焊接的方式连接。Further, the blocking plate and the right-angle fan-shaped baffle are connected by welding.
进一步的，所述扇形折流板上设置若干管孔，所述管孔用于支撑换热管束，若干换热管由所述管孔内穿过固定；所述扇形折流板上的管孔按照三角形或正方形等布管方式排列。Further, a plurality of tube holes are arranged on the fan-shaped baffle, and the tube holes are used to support the heat exchange tube bundle, and a plurality of heat exchange tubes are fixed through the tube holes; the tube holes on the fan-shaped baffle Arrange the pipes in a triangular or square manner.
进一步的，四块直角扇形折流板构成一个螺旋周期，通过定位杆定位。本发明为了克服的现有技术中对于管壳式换热器中壳程压力损失、综合换热性能与制造装配简便性之间互为矛盾的问题，提供一种带纵向堵板的阶梯式螺旋折流板及其换热器。本发明能够在换热器的壳程形成近似螺旋流道，使换热器壳程压力损失降低，具有较高的综合换热性能；同时，与普通的搭接式螺旋折流板相比，简化了折流板的加工及壳程内部结构，加工及装配方面更为简便。Further, four right-angle fan-shaped baffles form a helical cycle, and are positioned by positioning rods. In order to overcome the problems in the prior art of the shell-side pressure loss, comprehensive heat transfer performance and ease of manufacture and assembly in the shell-and-tube heat exchanger, the present invention provides a stepped spiral with a longitudinal blocking plate. Baffles and their heat exchangers. The invention can form an approximate spiral flow channel on the shell side of the heat exchanger, reduce the pressure loss on the shell side of the heat exchanger, and have higher comprehensive heat exchange performance; at the same time, compared with ordinary lapped spiral baffles, The processing of the baffle and the internal structure of the shell side are simplified, and the processing and assembly are more convenient.
为了实现上述目的，本发明采用如下一种技术方案：In order to achieve the above object, the present invention adopts the following technical scheme:
一种带纵向堵板的阶梯式螺旋折流板换热器，包括：管壳式换热器，该换热器包括管箱、管板、壳体和壳体内的若干个螺旋周期的带纵向堵板的阶梯式螺旋折流板和换热管束等，在换热器的壳程形成阶梯状螺旋流道。A stepped spiral baffle heat exchanger with longitudinal blocking plates, including: a shell-and-tube heat exchanger, which includes a tube box, a tube sheet, a shell, and several spiral cycles in the shell. The stepped spiral baffle plate of the blocking plate and the heat exchange tube bundle form a stepped spiral flow channel on the shell side of the heat exchanger.
进一步的，所述壳体为圆筒形壳体，所述圆筒形壳体两端分别设置左管板和右管板，所述左管板和右管板上分别设置若干管孔，所述管孔直径等于所述折流板管孔，所述换热管束的两端分别穿过所述左管板和右管板上的所述管孔进行固定。Further, the shell is a cylindrical shell, and the two ends of the cylindrical shell are respectively provided with a left tube plate and a right tube plate, and a plurality of tube holes are respectively set on the left tube plate and the right tube plate, so that The diameter of the tube hole is equal to that of the baffle tube hole, and the two ends of the heat exchange tube bundle pass through the tube holes on the left tube plate and the right tube plate respectively for fixing.
进一步的，每个螺旋周期壳程内的四块直角扇形折流板按照逆时针方向分别为第一直角扇形折流板、第二直角扇形折流板、第三直角扇形折流板和第四直角扇形折流板；所述堵板包括第一堵板、第二堵板和第三堵板，所述第一直角扇形折流板与第二直角扇形折流板相邻的直角边通过所述第一堵板连接，所述第二直角扇形折流板与第三直角扇形折流板相邻的直角边通过所述第二堵板连接，所述第三直角扇形折流板与第四直角扇形折流板相邻的直角边通过所述第三堵板连接；所述第一堵板与所述第二堵板垂直，所述第二堵板与所述第三堵板垂直；Further, the four right-angle fan-shaped baffles in each helical periodic shell are respectively the first right-angle fan-shaped baffle, the second right-angle fan-shaped baffle, the third right-angle fan-shaped baffle and the fourth right-angle fan-shaped baffle in the counterclockwise direction. Right-angle fan-shaped baffle; the blocking plate includes a first blocking plate, a second blocking plate and a third blocking plate, and the right-angled side adjacent to the first right-angle fan-shaped baffle and the second right-angle fan-shaped baffle passes through the The first blocking plate is connected, the right-angled side adjacent to the second right-angle fan-shaped baffle and the third right-angle fan-shaped baffle is connected through the second blocking plate, and the third right-angle fan-shaped baffle is connected to the fourth The adjacent right-angle sides of the right-angle fan-shaped baffles are connected by the third blocking board; the first blocking board is perpendicular to the second blocking board, and the second blocking board is perpendicular to the third blocking board;
左下方的换热管束依次穿过若干螺旋周期壳程内的第一直角扇形折流板，右下方的换热管束依次穿过若干螺旋周期壳程内的第二直角扇形折流板，右上方的换热管束依次穿过若干螺旋周期壳程内的第三直角扇形折流板，左上方的换热管束依次穿过若干螺旋周期壳程内的第四直角扇形折流板。The heat exchange tube bundle on the lower left passes through the first right-angle fan-shaped baffles in several helical periodic shells in turn, and the heat exchange tube bundle on the lower right passes through the second right-angled fan-shaped baffles in several helical periodic shells in turn, and the upper right The heat exchange tube bundles in the upper left pass through the third right-angle fan-shaped baffles in several helical periodic shell passes in turn, and the heat exchange tube bundle in the upper left passes through the fourth right-angle fan-shaped baffles in several spiral periodic shell passes in turn.
与现有技术相比，本发明的有益效果：Compared with prior art, the beneficial effect of the present invention:
(1)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，既适用于立式壳体换热器也适用于卧式壳体换热器，同时避免了传统的弓形折流板换热器(制造装配简便，换热系数高，但流动阻力大，存在流动死区)和目前已有的非连续搭接式螺旋折流板(解决了弓形折流板换热器流动阻力大的问题，但是在折流板的加工、钻孔及管束装配方面不及弓形折流板)的不足，兼顾了二者的优点，能够在换热器的壳程形成近似的螺旋流道(阶梯状螺旋流道)。(1) A stepped spiral baffle plate with a longitudinal blocking plate and its heat exchanger of the present invention are suitable for both vertical shell heat exchangers and horizontal shell heat exchangers, while avoiding the traditional The bow-shaped baffle heat exchanger (easy to manufacture and assemble, high heat transfer coefficient, but the flow resistance is large, and there is a flow dead zone) and the existing non-continuous overlapping spiral baffles (solved the problem of bow-shaped baffle heat exchangers) The problem of large flow resistance of the heat exchanger, but the processing, drilling and tube bundle assembly of the baffle is not as good as the bow-shaped baffle), taking into account the advantages of both, it can form an approximate spiral on the shell side of the heat exchanger Runner (stepped spiral flow channel).
(2)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，换热器壳程流体近似螺旋流，避免了弓形折流板换热器的壳程流体垂直冲刷管束的情况,使壳程的压力损失大大降低；与现有弓形折流板换热器相比，明显提高了综合的换热性能。(2) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, the shell side fluid of the heat exchanger is similar to a spiral flow, which avoids the vertical scour of the shell side fluid of the arcuate baffle heat exchanger The condition of the tube bundle greatly reduces the pressure loss of the shell side; compared with the existing bow-shaped baffle heat exchanger, the comprehensive heat transfer performance is obviously improved.
(3)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，从材料消耗的角度看，四块直角扇形折流板可由一块圆形板材切割而成，废料产生少，有效降低折流板板材消耗，同时所述堵板为矩形薄板，同样可整体剪裁成型，大大减少了废料的产生，节约成本。(3) A kind of stepped spiral baffle with longitudinal blocking plate and heat exchanger thereof of the present invention, from the angle of material consumption, four right-angled fan-shaped baffles can be cut from a circular plate, and the waste generated less, effectively reducing the consumption of baffle plates, and at the same time, the blocking plate is a rectangular thin plate, which can also be cut and formed as a whole, which greatly reduces the generation of waste and saves costs.
(4)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，在每个螺旋周期壳程内90°的扇形折流板在轴向没有重叠区域，可以根据设计需要调整直角扇形折流板间距，直角扇形折流板之间的间距越小，越接近螺旋流道；有效避免了折流板因重叠区域存在需要改变板间距的情况时，造成局部流通截面狭窄的情况。(4) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, the 90° fan-shaped baffles in the shell side of each spiral period have no overlapping area in the axial direction, and can be designed according to the design It is necessary to adjust the spacing of the right-angle fan-shaped baffles. The smaller the spacing between the right-angle fan-shaped baffles, the closer to the spiral flow channel; effectively avoiding the situation where the baffles need to change the spacing of the baffles due to overlapping areas, resulting in a narrow local flow section Case.
(5)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，纵向堵板的设置不仅仅有效防止相邻折流板间存在流动漏流问题，同时也能起到支撑阶梯式螺旋折流板的作用。(5) A stepped spiral baffle with a longitudinal baffle and its heat exchanger of the present invention, the setting of the longitudinal baffle not only effectively prevents the problem of flow leakage between adjacent baffles, but also plays a role To support the role of the stepped spiral baffle.
(6)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，结构上，直角扇形折流板垂直于换热器壳程轴向布置，与搭接式非连续螺旋折流板相比，在折流板定位、钻孔，以及管束的装配等方面更为便捷，制作难度和成本有一定的优势，因此在加工工艺及装配上得到了极大简化。(6) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, structurally, the right-angle fan-shaped baffle is arranged perpendicular to the axial direction of the shell side of the heat exchanger, and is discontinuous with the overlapping type Compared with spiral baffles, it is more convenient in baffle positioning, drilling, and tube bundle assembly, and has certain advantages in manufacturing difficulty and cost, so the processing technology and assembly have been greatly simplified.
附图说明Description of drawings
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.
图1(a)为现有的弓形折流板换热器内部弓形折流板结构示意图；Fig. 1(a) is a schematic diagram of the structure of the bow baffle inside the existing bow baffle heat exchanger;
图1(b)为现有的弓形折流板换热器内部弓形折流板的安装方式示意图；Figure 1(b) is a schematic diagram of the installation method of the bow baffle inside the existing bow baffle heat exchanger;
图2为弓形折流板换热器壳程流线示意图；Figure 2 is a schematic diagram of the shell side streamline of the arcuate baffle heat exchanger;
图3(a)为现有的螺旋折流板换热器内部连续螺旋折流板的结构示意图；Fig. 3 (a) is the structural representation of the continuous spiral baffle inside the existing spiral baffle heat exchanger;
图3(b)为现有的螺旋折流板换热器内部非连续螺旋折流板结构示意图；Fig. 3 (b) is a schematic diagram of the discontinuous spiral baffle structure inside the existing spiral baffle heat exchanger;
图4为本发明的一种带纵向堵板的阶梯式螺旋折流板换热器内的带纵向堵板的阶梯式螺旋折流板结构示意图；Fig. 4 is a structural schematic diagram of a stepped spiral baffle with a longitudinal blocking plate in a stepped spiral baffle heat exchanger with a longitudinal blocking plate of the present invention;
图5为带纵向堵板的阶梯式螺旋折流板换热器壳程流体的流线示意图；Fig. 5 is a schematic streamline diagram of the shell-side fluid of a stepped spiral baffle heat exchanger with a longitudinal blocking plate;
图6为同种条件下弓形折流板换热器与带纵向堵板的阶梯式螺旋折流板换热器综合换热性能比较图。Figure 6 is a comparison diagram of the comprehensive heat transfer performance of the bow-shaped baffle heat exchanger and the stepped spiral baffle heat exchanger with longitudinal blocking plates under the same conditions.
具体实施方式：detailed description:
应该指出，以下详细说明都是例示性的，旨在对本申请提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.
在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面结合附图与实施例对本发明作进一步说明。In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
实施例1：Example 1:
正如背景技术所介绍的，现有技术中存在对于管壳式换热器中壳程压力损失、综合换热性能与制造装配简便性之间互为矛盾的问题，提供了一种带纵向堵板的阶梯式螺旋折流板及其换热器。本发明能够在换热器的壳程形成近似螺旋流道，降低换热器壳程压力损失，具有较高的综合换热性能；同时，简化了折流板的加工及壳程内部结构，与普通的搭接式螺旋折流板相比，加工及装配方面更为简便。As introduced in the background technology, in the prior art, there are contradictions between shell-side pressure loss, comprehensive heat transfer performance and ease of manufacturing and assembly in the shell-and-tube heat exchanger, and a longitudinal blocking plate is provided. The stepped spiral baffle and its heat exchanger. The invention can form an approximate spiral flow channel on the shell side of the heat exchanger, reduce the pressure loss on the shell side of the heat exchanger, and have high comprehensive heat exchange performance; meanwhile, it simplifies the processing of the baffle plate and the internal structure of the shell side, which is compatible with Compared with ordinary lapped spiral baffles, it is easier to process and assemble.
本申请的一种典型的实施方式中，采用如下技术方案：In a typical implementation of the present application, the following technical solutions are adopted:
如图4所示，As shown in Figure 4,
一种带纵向堵板的阶梯式螺旋折流板，在一个换热器螺旋周期壳程内，包括：四块垂直于换热管束轴向且互不连接的直角扇形折流板，所述直角扇形折流板依次与其相邻的前一片所述直角扇形折流板绕换热管束中心轴向旋转90°，相邻直角扇形折流板之间通过堵板连接，在换热器的壳程形成阶梯状螺旋流道。A stepped spiral baffle with a longitudinal blocking plate, in a spiral periodic shell side of a heat exchanger, including: four right-angled fan-shaped baffles perpendicular to the axial direction of the heat exchange tube bundle and not connected to each other, the right-angled The fan-shaped baffles are sequentially rotated 90° around the center of the heat exchange tube bundle with the adjacent right-angled fan-shaped baffles in turn, and the adjacent right-angled fan-shaped baffles are connected by blocking plates. A stepped spiral flow channel is formed.
在本实施例中，所述直角扇形折流板之间互相平行，所述直角扇形折流板的圆心角为90°。In this embodiment, the right-angle fan-shaped baffles are parallel to each other, and the central angle of the right-angle fan-shaped baffles is 90°.
在本实施例中，在一个换热器螺旋周期壳程内，所述堵板的数量设置为三个，所述堵板采用矩形薄板，所述堵板与所述直角扇形折流板垂直，所述堵板的轴向跨度等于1/4周期的螺距。In this embodiment, in the spiral periodic shell side of a heat exchanger, the number of the blocking plates is set to three, the blocking plates are rectangular thin plates, and the blocking plates are perpendicular to the right-angle fan-shaped baffles, The axial span of the blocking plate is equal to the pitch of 1/4 period.
在本实施例中，四块直角扇形折流板由一块圆形板材切割形成。In this embodiment, four right-angle fan-shaped baffles are formed by cutting a circular plate.
在本实施例中，四块直角扇形折流板之间的间距为1/4周期的螺距。In this embodiment, the distance between the four right-angle fan-shaped baffles is 1/4 period of the pitch.
在本实施例中，堵板和直角扇形折流板之间用焊接的方式连接。In this embodiment, the blocking plate and the right-angle fan-shaped baffle are connected by welding.
在本实施例中，所述扇形折流板上设置若干管孔，所述管孔用于支撑换热管束，若干换热管由所述管孔内穿过固定。In this embodiment, several tube holes are provided on the fan-shaped baffle, and the tube holes are used to support the heat exchange tube bundle, and several heat exchange tubes pass through the tube holes and are fixed.
在本实施例中，所述扇形折流板上的管孔按照三角形或正方形等布管方式排列。In this embodiment, the tube holes on the fan-shaped baffle are arranged in a triangular or square tube arrangement.
实施例2：Example 2:
正如背景技术所介绍的，现有技术中存在对于管壳式换热器中壳程压力损失、综合换热性能与制造装配简便性之间互为矛盾的问题，提供一种带纵向堵板的阶梯式螺旋折流板及其换热器。本发明能够在换热器的壳程形成近似螺旋流道，使换热器壳程压力损失降低，具有较高的综合换热性能；同时，简化了折流板的加工及壳程内部结构，与普通的搭接式螺旋折流板相比，加工及装配方面更为简便。As introduced in the background technology, in the prior art, there are conflicting problems between shell-side pressure loss, comprehensive heat transfer performance and ease of manufacturing and assembly in the shell-and-tube heat exchanger. A stepped spiral baffle and its heat exchanger. The invention can form an approximate spiral flow channel on the shell side of the heat exchanger, reduce the pressure loss on the shell side of the heat exchanger, and have higher comprehensive heat exchange performance; meanwhile, it simplifies the processing of the baffle plate and the internal structure of the shell side, Compared with common lapped spiral baffles, it is easier to process and assemble.
本申请的一种典型的实施方式中，采用如下技术方案：In a typical implementation of the present application, the following technical solutions are adopted:
本实施例基于上述实施例1，This embodiment is based on the above-mentioned embodiment 1,
一种带纵向堵板的阶梯式螺旋折流板换热器，包括：立式管壳式换热器或卧式管壳式换热器，该换热器包括管箱、管板、壳体和壳体内的若干个螺旋周期壳程内的带纵向堵板的阶梯式螺旋折流板和换热管束，在换热器的壳程形成阶梯状螺旋流道。如图5所示。A stepped spiral baffle heat exchanger with longitudinal blocking plates, comprising: a vertical shell-and-tube heat exchanger or a horizontal shell-and-tube heat exchanger, the heat exchanger includes a tube box, a tube sheet, and a shell The stepped spiral baffles and heat exchange tube bundles with longitudinal blocking plates in the shell side of several spiral periodic shells in the shell form a stepped spiral flow channel on the shell side of the heat exchanger. As shown in Figure 5.
在本实施例中，所述壳体为圆筒形壳体，所述圆筒形壳体两端分别设置左管板和右管板，所述左管板和右管板上分别设置若干管孔，所述管孔直径等于所述折流板的管孔，所述换热管束的两端分别穿过所述左管板和右管板上的所述管孔进行固定。In this embodiment, the shell is a cylindrical shell, the two ends of the cylindrical shell are respectively provided with a left tube sheet and a right tube sheet, and a plurality of tube sheets are respectively arranged on the left tube sheet and the right tube sheet. The diameter of the tube hole is equal to the tube hole of the baffle plate, and the two ends of the heat exchange tube bundle pass through the tube holes on the left tube plate and the right tube plate respectively for fixing.
在本实施例中，如图4所示，每个螺旋周期壳程内的四块直角扇形折流板按照逆时针方向分别为第一直角扇形折流板、第二直角扇形折流板、第三直角扇形折流板和第四直角扇形折流板；In this embodiment, as shown in Figure 4, the four right-angle fan-shaped baffles in the shell side of each helical period are respectively the first right-angle fan-shaped baffle, the second right-angle fan-shaped baffle, and the second right-angle fan-shaped baffle in the counterclockwise direction. Three right-angle fan-shaped baffles and a fourth right-angle fan-shaped baffle;
在本实施例中，由定位杆对第一直角扇形折流板进行定位，然后比照第一直角扇形折流板绕换热管束中心轴向逆时针旋转90°，确定第二直角扇形折流板位置；比照第二直角扇形折流板绕换热管束中心轴向逆时针旋转90°，确定第三直角扇形折流板位置；比照第三直角扇形折流板绕换热管束中心轴向逆时针旋转90°，确定第四直角扇形折流板。重复上述过程。In this embodiment, the first right-angle fan-shaped baffle is positioned by the positioning rod, and then the second right-angle fan-shaped baffle is determined by referring to the counterclockwise rotation of the first right-angle fan-shaped baffle around the central axis of the heat exchange tube bundle by 90° Position; refer to the second right-angle fan-shaped baffle rotating 90° counterclockwise around the central axis of the heat exchange tube bundle to determine the position of the third right-angle fan-shaped baffle; refer to the third right-angle fan-shaped baffle counterclockwise around the central axis of the heat exchange tube bundle Rotate 90° to determine the fourth right-angle fan-shaped baffle. Repeat the above process.
所述堵板包括第一堵板、第二堵板和第三堵板，所述第一直角扇形折流板与第二直角扇形折流板相邻的直角边通过所述第一堵板连接，所述第二直角扇形折流板与第三直角扇形折流板相邻的直角边通过所述第二堵板连接，所述第三直角扇形折流板与第四直角扇形折流板相邻的直角边通过所述第三堵板连接；所述第一堵板与所述第二堵板垂直，所述第二堵板与所述第三堵板垂直；The blocking plate includes a first blocking plate, a second blocking plate and a third blocking plate, and the right-angle sides adjacent to the first right-angle fan-shaped baffle and the second right-angle fan-shaped baffle are connected through the first blocking plate , the right-angle sides adjacent to the second right-angle fan-shaped baffle and the third right-angle fan-shaped baffle are connected through the second blocking plate, and the third right-angle fan-shaped baffle is connected to the fourth right-angle fan-shaped baffle The adjacent right-angle sides are connected by the third blocking board; the first blocking board is perpendicular to the second blocking board, and the second blocking board is perpendicular to the third blocking board;
左下方的换热管束依次穿过若干螺旋周期壳程内的第一直角扇形折流板，右下方的换热管束依次穿过若干螺旋周期壳程内的第二直角扇形折流板，右上方的换热管束依次穿过若干螺旋周期壳程内的第三直角扇形折流板，左上方的换热管束依次穿过若干螺旋周期壳程内的第四直角扇形折流板。The heat exchange tube bundle on the lower left passes through the first right-angle fan-shaped baffles in several helical periodic shells in turn, and the heat exchange tube bundle on the lower right passes through the second right-angled fan-shaped baffles in several helical periodic shells in turn, and the upper right The heat exchange tube bundles in the upper left pass through the third right-angle fan-shaped baffles in several helical periodic shell passes in turn, and the heat exchange tube bundle in the upper left passes through the fourth right-angle fan-shaped baffles in several spiral periodic shell passes in turn.
本实施例的对比采用同种条件下现有的弓形折流板换热器。The comparison of this embodiment adopts the existing arcuate baffle heat exchanger under the same conditions.
如图6所示，通过对比研究可知，同种条件下将弓形折流板换热器与本发明带纵向堵板的阶梯式螺旋折流板换热器运用数值计算得出，在所研究范围雷诺数内(2000-9000)，本发明带纵向堵板的阶梯式螺旋折流板换热器的综合换热性能明显高于弓形折流板换热器。As shown in Figure 6, it can be seen through comparative research that under the same conditions, the arcuate baffle heat exchanger and the stepped spiral baffle heat exchanger with longitudinal blocking plate of the present invention are obtained through numerical calculation. Within the Reynolds number (2000-9000), the comprehensive heat transfer performance of the stepped spiral baffle heat exchanger with longitudinal blocking plate of the present invention is obviously higher than that of the arcuate baffle heat exchanger.
与现有技术相比，本发明的有益效果：Compared with prior art, the beneficial effect of the present invention:
(1)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，既适用于立式壳体换热器也适用于卧式壳体换热器，同时避免了传统的弓形折流板换热器(制造装配简便，换热系数高，但流动阻力大，存在流动死区)和目前已有的不连续搭接式螺旋折流板(解决了弓形折流板换热器流动阻力大的问题，但是在折流板的加工、钻孔及管束装配方面不及弓形折流板)的不足，兼顾了二者的优点，能够在换热器的壳程形成近似的螺旋流道(阶梯状螺旋流道)。(1) A stepped spiral baffle plate with a longitudinal blocking plate and its heat exchanger of the present invention are suitable for both vertical shell heat exchangers and horizontal shell heat exchangers, while avoiding the traditional The bow-shaped baffle heat exchanger (easy to manufacture and assemble, high heat transfer coefficient, but large flow resistance, there is a flow dead zone) and the existing discontinuous lap-type spiral baffles (solved the problem of bow-shaped baffle heat exchangers) The problem of large flow resistance of the heat exchanger, but the processing, drilling and tube bundle assembly of the baffle is not as good as the bow-shaped baffle), taking into account the advantages of both, it can form an approximate spiral on the shell side of the heat exchanger Runner (stepped spiral flow channel).
(2)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，换热器壳程流体近似螺旋流，避免了弓形折流板换热器的壳程流体垂直冲刷管束的情况,使壳程的压力损失大大降低；与现有弓形折流板换热器相比，明显提高了综合的换热性能，单位压降下的换热系数明显高于弓形折流板式换热器区。(2) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, the shell side fluid of the heat exchanger is similar to a spiral flow, which avoids the vertical scour of the shell side fluid of the arcuate baffle heat exchanger The condition of the tube bundle greatly reduces the pressure loss of the shell side; compared with the existing bow-shaped baffle heat exchanger, the comprehensive heat transfer performance is obviously improved, and the heat transfer coefficient under the unit pressure drop is significantly higher than that of the bow-shaped baffle heat exchanger. heat exchanger area.
(3)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，从材料消耗的角度看，四块直角扇形折流板可由一块圆形板材切割而成，废料产生少，有效降低折流板板材消耗，同时所述堵板为矩形薄板，同样可整体剪裁成型，大大减少了废料的产生，节约成本。(3) A kind of stepped spiral baffle with longitudinal blocking plate and heat exchanger thereof of the present invention, from the angle of material consumption, four right-angled fan-shaped baffles can be cut from a circular plate, and the waste generated less, effectively reducing the consumption of baffle plates, and at the same time, the blocking plate is a rectangular thin plate, which can also be cut and formed as a whole, which greatly reduces the generation of waste and saves costs.
(4)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，在每个螺旋周期壳程内90°的扇形折流板在轴向没有重叠区域，可以根据设计需要调整直角扇形折流板间距，直角扇形折流板之间的间距越小，越接近螺旋流道；有效避免了折流板因重叠区域存在需要改变板间距的情况时，造成局部流通截面狭窄的情况。(4) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, the 90° fan-shaped baffles in the shell side of each spiral period have no overlapping area in the axial direction, and can be designed according to the design It is necessary to adjust the spacing of the right-angle fan-shaped baffles. The smaller the spacing between the right-angle fan-shaped baffles, the closer to the spiral flow channel; effectively avoiding the situation where the baffles need to change the spacing of the baffles due to overlapping areas, resulting in a narrow local flow section Case.
(5)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，纵向堵板的设置不仅仅有效防止相邻折流板间存在流动漏流问题，同时也能起到支撑阶梯式螺旋折流板的作用。(5) A stepped spiral baffle with a longitudinal baffle and its heat exchanger of the present invention, the setting of the longitudinal baffle not only effectively prevents the problem of flow leakage between adjacent baffles, but also plays a role To support the role of the stepped spiral baffle.
(6)本发明的一种带纵向堵板的阶梯式螺旋折流板及其换热器，结构上，直角扇形折流板垂直于换热器壳程轴向布置，与搭接式不连续螺旋折流板相比，在折流板定位、钻孔，以及管束的装配等方面更为便捷，制作难度和成本有一定的优势，因此在加工工艺及装配上得到了极大简化。(6) A stepped spiral baffle with a longitudinal blocking plate of the present invention and its heat exchanger, structurally, the right-angle fan-shaped baffle is arranged perpendicular to the axial direction of the shell side of the heat exchanger, and is discontinuous with the overlapping type Compared with spiral baffles, it is more convenient in baffle positioning, drilling, and tube bundle assembly, and has certain advantages in manufacturing difficulty and cost, so the processing technology and assembly have been greatly simplified.
上述虽然结合附图对本发明的具体实施方式进行了描述，但以上所述仅为本申请的优选实施例而已，并非对本发明保护范围的限制，对于本领域的技术人员来说，本申请可以有各种更改和变化。所属领域技术人员应该明白，在本发明的技术方案的基础上，本领域技术人员不需要付出创造性劳动即可做出的各种修改、等同替换或变形仍在本发明的保护范围以内。Although the above has described the specific implementation of the present invention in conjunction with the accompanying drawings, the above is only a preferred embodiment of the application, and is not a limitation of the protection scope of the present invention. For those skilled in the art, this application can have Various changes and variations. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications, equivalent replacements or deformations that those skilled in the art can make without creative work are still within the protection scope of the present invention.
Claims (10)
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| CN201710515949.9A CN107270749A (en) | 2017-06-29 | 2017-06-29 | The staged helical baffles and its heat exchanger of a kind of longitudinal closure plate of band |
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| CN201710515949.9A CN107270749A (en) | 2017-06-29 | 2017-06-29 | The staged helical baffles and its heat exchanger of a kind of longitudinal closure plate of band |
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| CN110514054A (en) * | 2019-08-01 | 2019-11-29 | 中石化宁波工程有限公司 | Stepped spiral baffle and heat exchanger using the baffle |
| CN110530175A (en) * | 2019-07-22 | 2019-12-03 | 浙江科技学院 | A stepped oblique flow spiral baffle heat exchanger |
| CN112212724A (en) * | 2020-11-06 | 2021-01-12 | 浙江欧森环境科技有限公司 | A heat exchanger with swirl baffles |
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