阅读说明：本技术 一种射流式折流板换热器 (Jet flow type baffle plate heat exchanger ) 是由 张爽 段有龙 曲斌 于涛 曹培城 于 2020-07-03 设计创作，主要内容包括：本发明涉及一种射流式折流板换热器,包括由筒体、管箱一、管板一、管箱二、管板二、换热管束及折流板组成的管壳式换热器；所述折流板为整圆形折流板,折流板上平行开设多个长圆孔,长圆孔的宽度与换热管的直径相配合；相邻2个折流板沿筒体周向交错90°设置；所述换热管采用正方形或转角正方形排列。本发明采用整圆形折流板,相邻两块折流板交错90°设置,使壳程流体的流向为沿筒体轴向的纵向流,并且具有射流及扰流效果,从而使流场分布更均匀,消除传热死区,并且延长换热器的使用寿命。(The invention relates to a jet flow type baffle plate heat exchanger, which comprises a shell-and-tube heat exchanger consisting of a cylinder body, a tube box I, a tube plate I, a tube box II, a tube plate II, a heat exchange tube bundle and a baffle plate; the baffle plate is a full-circle baffle plate, a plurality of long round holes are formed in the baffle plate in parallel, and the width of each long round hole is matched with the diameter of the heat exchange tube; the adjacent 2 baffle plates are arranged along the circumferential direction of the cylinder body in a staggered 90-degree manner; the heat exchange tubes are arranged in a square or corner square mode. The invention adopts the whole circular baffle plates, and two adjacent baffle plates are arranged in a staggered way at 90 degrees, so that the flow direction of the shell-side fluid is longitudinal flow along the axial direction of the cylinder, and the shell-side fluid has jet flow and turbulence effects, thereby ensuring that the flow field is more uniformly distributed, eliminating heat transfer dead zones and prolonging the service life of the heat exchanger.)

1. A jet flow type baffle plate heat exchanger comprises a shell-and-tube heat exchanger consisting of a cylinder body, a tube box I, a tube plate I, a tube box II, a tube plate II, a heat exchange tube bundle and a baffle plate; the first tube plate and the second tube plate are respectively arranged at two ends of the barrel, the first tube box is fixedly connected with the first tube plate, and the second tube box is fixedly connected with the second tube plate; a heat exchange tube bundle for communicating a first tube box and a second tube box is arranged in the barrel, a tube side medium inlet is formed in the first tube box, and a tube side medium outlet is formed in the second tube box; the two ends of the cylinder are respectively provided with a shell pass medium inlet and a shell pass medium outlet; a plurality of baffle plates are arranged in the cylinder, a heat exchange tube bundle vertically penetrates through each baffle plate, and the heat exchange tube bundle is composed of a plurality of heat exchange tubes arranged in parallel; the heat exchanger is characterized in that the baffle plate is a full-circle baffle plate, a plurality of long round holes are formed in the baffle plate in parallel, and the width of each long round hole is matched with the diameter of the heat exchange tube; the adjacent 2 baffle plates are arranged along the circumferential direction of the cylinder body in a staggered 90-degree manner; the heat exchange tubes are arranged in a square or corner square mode.

2. The jet-flow baffle plate heat exchanger as claimed in claim 1, wherein a plurality of distance pipes are arranged between the adjacent 2 baffle plates, the distance pipes are arranged at the edge of the baffle plate, and the distance pipes are uniformly arranged along the circumferential direction of the cylinder; the corresponding position of the baffle plate is provided with a distance tube positioning hole.

3. The jet-flow baffle plate heat exchanger as claimed in claim 1, wherein the length of the oblong hole is adapted to the width of the baffle plate at the corresponding position, namely the length of the oblong hole close to the center of the baffle plate is longer than the length of the oblong hole far away from the center of the baffle plate; and the longest oblong hole length is the same as the perpendicular distance from the outer edge of the 2 oblong holes that are farthest apart.

Technical Field

The invention relates to the technical field of shell-and-tube heat exchangers, in particular to a jet-flow type baffle plate heat exchanger.

Background

The shell-and-tube heat exchanger is also called a shell-and-tube heat exchanger. The dividing wall type heat exchanger takes the wall surface of a heat exchange tube bundle sealed in a shell as a heat transfer surface. The heat exchanger has the advantages of simple structure, low cost, wider flow cross section, easy scale cleaning and the like; its disadvantages are low heat transfer coefficient and large floor area. The shell-and-tube heat exchanger can be made of various structural materials (mainly metal materials), can be used at high temperature and high pressure, and is the most widely applied heat exchanger type.

The shell-and-tube heat exchanger is often provided with a baffle plate for guiding the shell-side fluid medium to continuously flow in a zigzag shape in the heat exchanger. In the heat exchanger adopting the structure, as shell-side fluid needs to pass through the heat exchange tube bundle transversely for many times, the washing direction is changed repeatedly, and the washing angle is approximately vertical, the flow resistance of the fluid is very large, and a flow dead zone exists locally; meanwhile, induced vibration is easily caused, so that the vibration abrasion of the heat exchange tube is increased, and finally the heat exchange tube is leaked.

Disclosure of Invention

The invention provides a jet flow type baffle plate heat exchanger, which adopts a full-circle baffle plate, wherein two adjacent baffle plates are arranged in a staggered way at 90 degrees, so that the flow direction of a shell-side fluid is longitudinal flow along the axial direction of a cylinder, and the jet flow type baffle plate heat exchanger has jet flow and turbulence effects, thereby ensuring that the flow field distribution is more uniform, eliminating heat transfer dead zones and prolonging the service life of the heat exchanger.

In order to achieve the purpose, the invention adopts the following technical scheme:

a jet flow type baffle plate heat exchanger comprises a shell-and-tube heat exchanger consisting of a cylinder body, a tube box I, a tube plate I, a tube box II, a tube plate II, a heat exchange tube bundle and a baffle plate; the first tube plate and the second tube plate are respectively arranged at two ends of the barrel, the first tube box is fixedly connected with the first tube plate, and the second tube box is fixedly connected with the second tube plate; a heat exchange tube bundle for communicating a first tube box and a second tube box is arranged in the barrel, a tube side medium inlet is formed in the first tube box, and a tube side medium outlet is formed in the second tube box; the two ends of the cylinder are respectively provided with a shell pass medium inlet and a shell pass medium outlet; a plurality of baffle plates are arranged in the cylinder, a heat exchange tube bundle vertically penetrates through each baffle plate, and the heat exchange tube bundle is composed of a plurality of heat exchange tubes arranged in parallel; the baffle plate is a full-circle baffle plate, a plurality of long round holes are formed in the baffle plate in parallel, and the width of each long round hole is matched with the diameter of the heat exchange tube; the adjacent 2 baffle plates are arranged along the circumferential direction of the cylinder body in a staggered 90-degree manner; the heat exchange tubes are arranged in a square or corner square mode.

A plurality of distance pipes are arranged between the adjacent 2 baffle plates and are arranged at the edges of the baffle plates, and the distance pipes are uniformly arranged along the circumferential direction of the cylinder body; the corresponding position of the baffle plate is provided with a distance tube positioning hole.

The length of the long round hole is matched with the width of the baffle plate at the corresponding part, namely the length of the long round hole close to the center of the baffle plate is longer than that of the long round hole far away from the center of the baffle plate; and the longest oblong hole length is the same as the perpendicular distance from the outer edge of the 2 oblong holes that are farthest apart.

Compared with the prior art, the invention has the beneficial effects that:

1) the heat exchanger adopts the jet flow type baffle plate to replace the traditional baffle plate or the supporting plate, so that the flow direction of shell-side fluid mainly comprising transverse flow and cross flow in the conventional baffle plate heat exchanger is changed into longitudinal flow along the axial direction of the shell, the flow field distribution is more uniform, the heat transfer dead zone is eliminated, and the shearing stress between the heat exchange tube bundle and the supporting structure can be effectively reduced;

2) the transverse scouring of the heat exchange tube bundle is eliminated, meanwhile, the fluid induced vibration is effectively eliminated, and the abrasion of the heat exchange tube bundle is reduced.

3) In the heat exchanger, because the fluid in the shell side flows along the heat exchange tube bundle, turbulent flow can be generated when the fluid meets the baffle plate, and the fluid meets the next baffle plate to generate turbulent flow again after the strength of the turbulent flow is weakened, so that the reciprocating motion is realized, the laminar flow boundary layer is thinned through multiple times of disturbance, and the heat transfer effect is effectively enhanced;

4) due to the self-cleaning function of the turbulent flow, dirt in the heat exchanger is not easy to deposit, so that the heat exchanger has the advantages of long service life, energy conservation and the like.

Drawings

Fig. 1 is a schematic structural diagram of a jet-flow baffle plate heat exchanger according to the invention.

FIG. 2 is a front view of the baffle of the present invention.

FIG. 3 is a second front view (rotated 90) of the baffle of the present invention.

In the figure: 1. tube box I2, tube plate I3, cylinder 4, heat exchange tube bundle 5, baffle plate 6, tube plate II 7, tube box II 8, long circular hole 9, distance tube positioning hole

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1-3, the jet-type baffle plate heat exchanger of the present invention comprises a shell-and-tube heat exchanger composed of a cylinder 3, a first tube box 1, a first tube plate 2, a second tube box 7, a second tube plate 6, a heat exchange tube bundle 4 and a baffle plate 5; the tube plate I2 and the tube plate II 6 are respectively arranged at two ends of the barrel 3, the tube box I1 is fixedly connected with the tube plate I2, and the tube box II 7 is fixedly connected with the tube plate II 6; a heat exchange tube bundle 4 for communicating a first tube box 1 and a second tube box 7 is arranged in the cylinder 3, a tube side medium inlet is arranged on the first tube box 1, and a tube side medium outlet is arranged on the second tube box 7; the two ends of the cylinder 3 are respectively provided with a shell pass medium inlet and a shell pass medium outlet; a plurality of baffle plates 5 are arranged in the cylinder 3, the heat exchange tube bundle 4 vertically penetrates through each baffle plate 5, and the heat exchange tube bundle 4 is composed of a plurality of heat exchange tubes arranged in parallel; the baffle plate 5 is a full-circle baffle plate, a plurality of long round holes 8 are formed in the baffle plate 5 in parallel, and the width of each long round hole 8 is matched with the diameter of the heat exchange tube; the adjacent 2 baffle plates 5 are arranged along the circumferential direction of the cylinder 3 in a staggered 90-degree manner; the heat exchange tubes are arranged in a square or corner square mode.

A plurality of distance pipes are arranged between the adjacent 2 baffle plates 5 and are arranged at the edges of the baffle plates 5, and the distance pipes are uniformly arranged along the circumferential direction of the cylinder 3; a distance tube positioning hole 9 is arranged at the corresponding position of the baffle plate 5.

The length of the long round hole 8 is matched with the width of the baffle plate 5 at the corresponding position, namely the length of the long round hole 8 close to the center of the baffle plate 5 is longer than that of the long round hole 8 far away from the center of the baffle plate 5; and the longest oblong hole 8 is of the same length as the outer edge of the 2 oblong holes 8 that are furthest apart.

Compared with the conventional shell-and-tube heat exchanger with the baffle plates, in the jet flow type baffle plate heat exchanger, the baffle plates 5 are full-circle baffle plates, and the adjacent 2 baffle plates 5 are arranged along the circumferential direction of the cylinder 3 in a staggered 90-degree mode, namely the axial directions of the long round holes 8 in the adjacent 2 baffle plates 5 are mutually vertical. The heat exchange tubes penetrate through the long round holes 8, gaps are still left in the long round holes 8 between every two adjacent heat exchange tubes, and shell-side fluid passes through the gaps to generate a jet effect. And the flow direction of the shell-side fluid is parallel to the axial direction of the cylinder 3 when the shell-side fluid passes through the gap. Because adjacent 2 baffle plates 5 are arranged in a staggered manner, the shell-side fluid ejected from the gap of the long round hole 8 of the previous baffle plate 5 is blocked at the corresponding position of the next baffle plate 5, so that the turbulent flow effect is generated.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.