Heat exchanger for viscous liquids

专利摘要:
A ribbed construction assembled from sheet metal bands for improved heat transfer, suitably built into the pipes of heat exchangers forms the arrangement of the invention. The ribbed construction assembled from toothed metal bands ensures the improved heat transfer primarily by slowing down the velocity of the medium flowing in the center of the pipe; furthermore it improves the temperature distribution of the flowing medium by means of metallic contact and mixing. Although the ribs are easily movable in the pipe, a significant portion of the tooth-ends is in loose contact with the inner pipe wall, which likewise improves the heat transfer.
公开号:SU950202A3
申请号:SU802939455
申请日:1980-06-30
公开日:1982-08-07
发明作者:Бергманн Дьердь；Хорват Михай；Палфалви Дьердь；Томчаньи Габор；Ковач Дьюла；Ласло Карой
申请人:Трансэлектро Мадьяр Вилламошшаги Кюлькерешкеделми Валлалат(Инопредприятие)；
IPC主号:

专利说明:

The invention relates to apparatuses used in industry for working on viscous liquids.
Known heat exchangers for viscous fluids containing a heat exchange element in the form of a pipe with a turbulator inside, made of roll sheets having slots and petals, bent at an angle relative to the longitudinal axis of the pipe [1].
The disadvantage of the heat exchanger is its low thermal conductivity, which is the result of poor mixing of the medium flow inside the pipe, if a viscous liquid is used as such.
Due to the fact that the flows of viscous fluids are laminar, the boundary layer formed on the inner walls of the pipe in this case is an additional resistance and prevents the intensive heat transfer through the pipe wall to the middle part of the fluid flow.
The purpose of the invention is the intensification of heat transfer.
• The goal is achieved in that in a heat exchanger for viscous liquids containing a heat exchanger element in the form of a pipe with a turbulator inside, made of roll sheets having slots and petals bent at an angle relative to the longitudinal axis of the pipes, the petals of each sheet are located in the slots of adjacent sheets with the formation of a central channel in the form of a regular polygon, the number of sides of which is equal to the number of sheets.
In this case, the sheets additionally have openings with bent edges, some of which are bent into the channel, and others outside.
Figure 1 shows the proposed heat exchanger in a perspective view with a turbulator of 4 roll sheets; in Fig., 2 is the same, from 3 roll sheets, cross-section. Fig. 3 is the same, in a perspective view; figure 4 - the same, from 4 roll sheets, cross-section. in FIG. 5 - a roll sheet with petals located at right angles to the longitudinal axis of the pipe; in FIG. 6.- the same, at an acute angle to the axis of the pipe; in FIG. 7 - turbulator made of 4 roll sheets, the petals of which are located at an acute angle to the axis of the pipe; in FIG. 8 is an embodiment of a roll sheet with petals located at an acute angle to the axis of the pipe;
in FIG. 9 - an embodiment of a roll sheet with petals located at right angles to the axis of the pipe .5; in FIG. 10 -. a roll sheet with petals located at an acute angle to the axis of the pipe, provided with openings; in FIG. 11 - a heat exchanger with a turbulator inside, having 10 holes with bent edges, a longitudinal section; Fig.12 is the same, _h cross section; in FIG. 13 - heat exchanger with a turbulator made of 3 roll sheets with 15 petals curved in an arc, cross section; in FIG. 14 - heat exchanger with a turbulator inside, made of 4 roll sheets with petals curved in an arc, cross section.
The heat exchanger contains a heat exchange element in the form of a pipe 1, a turbulizer 2 from roll sheets 3 having slots 4 and petals 5. The turbulizer 2 has a channel b in the form of a regular polygon (square, triangle, etc.), and the roll sheet has openings 7 with edges 8.
The heat exchanger operates as follows.
Viscous liquid enters the space between the pipe and the turbulizer, and a heating or cooling medium washes the pipe 1 from the outside. The result is either heating, 35 or cooling a viscous liquid. If necessary, additional coolant can circulate inside the channel b (in the case when the sheets are not provided with openings). jlO
Due to the location of the petals of each roll sheet in adjacent slots, the flow of viscous fluid is mixed in the space between the inner wall of the pipe and the roll sheets 45, due to which the boundary layer is destroyed and the additional thermal resistance is eliminated. If the sheets are equipped with holes, then in the channel b and in the space between the turbulator 2 and the pipe 1, in this case the same liquid flows, the flow of which circulates through the holes 7 and is mixed thanks to the petals 5 and the edges 8 of the roll holes 7 sheets 3.
The proposed heat exchanger is structurally simple. The turbulator installed in it can be easily mounted and dismantled, which facilitates the operation of the heat exchanger and its cleaning. In addition, in the heat exchanger thanks to the installed. in it, the turbulizer of the above construction provides an inhomogeneous thermal ’speed profile, which results in a uniform temperature distribution in the’ cross section of the heat exchanger pipe.

权利要求:
Claims (2)
[1]
The invention relates to apparatus used in the industry for operating on viscous liquids. Heat exchangers for viscous liquids are known, which contain a heat exchanging element in the form of a pipe with a turbulizer inside, made of coiled sheets, having slots and petals bent at an angle relative to the longitudinal axis of the pipe 1. The heat exchanger lacks a low thermal conductivity resulting from weak mixing of the flow of the medium inside the pipe in case of using a viscous liquid as such medium. Since the flow of viscous liquids is laminar, the boundary layer formed on the inner walls of the pipe in this case is an additional resistance and prevents intensive heat transfer through the pipe wall to the middle part of the fluid flow. The purpose of the invention is to intensify heat transfer. This goal is achieved by the fact that in a heat exchanger for viscous liquids containing a heat exchange element in the form of a tube with a turbulizer inside made of roll sheets having slots and petals bent at an angle relative to the longitudinal axis of the tubes, the petals of each sheet are located in the slots of adjacent sheets with the formation of a central channel in the form of a regular polygon, the number of sides of which is equal to the number of sheets. In this case, the sheets additionally have holes with bent edges, some of which are bent inward of the channel, and others outward. Figure 1 shows the proposed heat exchanger in axonometry with a tuner. From 4 rolled sheets in FIG. 2 - the same, from 3 rolled sheets, transverse. cross section; Figure 4 shows the same. In FIG. 4, the same, from 4-X rolled sheets, the cross section; in fig. 5 - a rolled sheet with petals located at a right angle to the longitudinal axis of the pipe; in fig. 6-- the same, at an acute angle to the axis of the pipe; in fig. 7 - turbulator, made of 4 rolled sheets, the petals of which are located at an acute angle to the axis of the pipe; in fig. 8 shows an embodiment of a roll sheet with petals located at an acute angle to the pipe axis; in fig. 9 is an embodiment of a roll sheet with petals located at a right angle to the pipe axis; in fig. ten -. a roll sheet with petals located at an acute angle to the axis of the pipe, provided with an opening; in fig. 11 - a heat exchanger with a turbulizer inside, having openings with bent edges, a longitudinal section; on Fig - the same. Cross-section; in fig. 13 - heat exchanger with a turbulizer made of 3 roll sheets with petals curved in an arc, cross section; in fig. 14 - heat exchanger with a turbulizer inside, made of 4 rolled sheets with petals curved in an arc, cross section. The heat exchanger contains a heat exchange element in the form of a pipe 1, a turbulizer 2 made from roll sheets 3 having slots 4 and petals 5. The turbulator 2 has a channel 6 in the shape of a regular polygon (square, triangle, etc.), and the roll sheet has holes 7 with edges 8. The heat exchanger operates as follows. As a liquid enters the space between the pipe and the turbulizer, while the heating or cooling medium and the medium wash the pipe 1 outside. As a result, either a heating or cooling of a viscous liquid is carried out. Inside the channel b, if necessary, additional coolant can circulate (in the case when the sheets are not provided with holes). Due to the arrangement of the petals of each roll sheet in the slots of the adjacent, the flow of viscous liquid is mixed in the space between the inner wall of the pipe and the rolled sheets, as a result of which the boundary layer is destroyed and the additional thermal resistance is eliminated. If the sheets are provided with holes, then the same fluid flows in the channel b and in the space between the turbulator 2 and the pipe 1, the flow of which circulates through the holes 7 and mixes due to the petals 5 and the edges 8 of the holes 7 of the roll sheets 3. The proposed heat exchanger is structurally simple. A turbulator installed in it can be easily mounted and dismantled, which facilitates the operation of the heat exchanger and cleaning it. In addition, in the heat exchanger, due to the turbulizer installed above, the above-described construction provides an inhomogeneous thermal velocity profile, the result of which is a uniform temperature distribution in the cross section of the heat exchanger pipe. Claim 1. Heat exchanger for viscous liquids, with; holding heat exchange element in tubes with a turbulizer inside, made of roll sheets having slots and petals bent at an angle relative to the axis of the tube, characterized in that, in order to intensify heat exchange, the petals of each sheet are located in the slots of adjacent sheets with the formation of a central channel in the shape of a regular polygon, the number of sides of which is equal to the number of sheets.
[2]
2. A heat exchanger according to claim 1, wherein the sheets additionally have openings with bent edges, some of which are bent inward of the channel and others outward. Sources of information taken into account in the examination 1. US Patent 2079144, cl. 138-38, pub. 1968.
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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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HU79EE2679A|HU179455B|1979-07-16|1979-07-16|Ribbed device improving the heat transfer composed from sheet strips|

---