CN1043960C

CN1043960C - Reflux ratio controller

Info

Publication number: CN1043960C
Application number: CN94100656A
Authority: CN
Inventors: 宋光复; 张志强; 赵明星; 王汉生
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 1994-01-21
Filing date: 1994-01-21
Publication date: 1999-07-07
Anticipated expiration: 2014-01-21
Also published as: CN1093298A

Abstract

The present invention provides an overflow type reflux ratio controller which can be arranged in a tower or outside the tower, has the advantages of simple structure and accurate metering, can freely change the reflux ratio and is provided with a separating device and a transmission mechanism for a distilling tower. The overflow type reflux ratio controller provided by the present invention comprises two structures, wherein one is the overflow type reflux ratio controller provided with a separating roller and the transmission mechanism, the other is the overflow type reflux ratio controller provided with a separating cover partition board and the transmission mechanism.

Description

Reflux ratio controller

The invention belongs to one of parts of destilling tower in the Chemical Manufacture.

Distillation procedure in the chemical industry is one of important unit operations of Chemical Manufacture.In the distillation procedure process, according to the composition of material liquid and to the factors such as concrete composition requirement of raffinate and product, the operating parameter of decision destilling tower, in batch distillation or continuous still operating process, often need be by adjusting the operating parameter that reflux ratio realizes destilling tower.The ratio of capacity of returns and quantum of output is called reflux ratio in destilling tower, if quantum of output be zero (also claiming infinite reflux) then reflux ratio for infinitely great, in practical operation, often will be by calculating the suitable reflux ratio of decision.

In the distillation procedure process, often adopt the reflux ratio of a fixed structure to distribute control device, realize refluxing in the distillation procedure process and stable allocation that two strands of liquid of output flow, otherwise can influence even the stable operation of destructive distillation process.But in present many distillation procedures, distribute control device owing to lack desirable reflux ratio, tend to occur refluxing and two bursts of liquid flow distribution instabilities of output, measure inaccurately, drawbacks such as operating difficulties cause destilling tower to be difficult to the realization stable operation.

The objective of the invention is to create a kind of being installed in and also can be installed in outer simple in structure of tower in the tower, accurate measurement can change the overflow-type reflux ratio controller with separating device and transmission mechanism of reflux ratio arbitrarily.According to the overhead vapours condensate liquid is realized that by overflow mechanism backflow and two strands of liquid of output flow the imagination of stable allocation, have proposed to have the overflow-type reflux ratio controller with transmission mechanism of separating the covering dividing plate.

Design feature such as the figure one that now the present invention are proposed with overflow-type reflux ratio controller of having transmission mechanism of separating the covering dividing plate, shown in the figure two, this kind structure has a angle constant output overflow area that 15 ° hole, square weir forms and links to each other with output pipe 110, and another angle is the backflow overflow area that forms of 125 ° hole, square weir and links to each other with return duct 112, the size of reflux ratio is then adjusted with the relative position in hole, the square weir of backflow overflow area by hiding dividing plate 114

Among the figure one:

101. follower, 102. revolving sleeves, 103. driving wheels,

104. carriage, 105. overflow ladles, 106. overcoat buckets,

107. sealing gasket, 108. driving levers, 109. cushion collar buckets,

Among the figure two:

110. output pipe, 111. dividing plates, 112. return ducts,

113. screw, 114. hides dividing plate.

Now have and separate to hide dividing plate and be described below with the design feature of the overflow-type reflux ratio controller of transmission mechanism:

The middle part of reflux ratio controller is overflow ladle 105 and cushion collar bucket 109, and form a cannelure with overcoat bucket 106, dividing plate 111 and hide dividing plate 114 cannelure is divided into two parts, bucket wall lower periphery at overflow ladle 105 is furnished with two holes, square weir of not waiting, two parts of the corresponding cannelure of difference, the constant output overflow area that corresponding angle is 15 ° of fixed angles links to each other with output pipe 110, another is that corresponding maximum angle is that the backflow overflow area of 125 ° of variable angles links to each other with return duct 112, for making liquid stream stable, in the outside of overflow ladle 105 cushion collar bucket 109 is housed, under normal circumstances, the formed camber line in hole, square weir that leads to output pipe 110 is in naked situation, often be in full outflow state, the formed camber line in hole, square weir that leads to return duct 112 flow that decision refluxes that then matches with the relative position of the covering dividing plate 114 that can move along the crest of weir camber line forms stable reflux ratio thus.If desire changes reflux ratio, only need to change that to hide dividing plate 114 be that relative position on 125 ° the hole, square weir just can be realized at angle, the displacement that hides dividing plate 114 is by driving wheel 103 and follower 101 revolving sleeve 102 to be rotated by the transmission mechanism of having, at the lower end of revolving sleeve 102 iron chains a pair of driving lever 108 is arranged, make and hide dividing plate 114 and move along cannelure, change relative position, realize the adjustment of reflux ratio.

The present invention has following characteristics:

1. can make destilling tower realize stable reflux ratio operation.

2. the scope of adjusting reflux ratio is wide, and it is 0.1 that reflux ratio can transfer to reflux ratio from infinite reflux.According to the specific requirement scope of reflux ratio, also can adjust the concrete structure size of downflow weir groove.

3. after the condensate liquid overflow is flowed out, a stable liquid level is arranged, design and installed additional the cushion collar bucket.

4. can realize automatic control and far distance controlled.

Embodiments of the invention are as follows:

One, produces the vanillic aldehyde intermittent column, its rerum natura is a high-solidification point, the thermal sensitivity organic matter, former employing intermittence, pulsation, swinging-bucket type reflux ratio controller, normal because of stagnant material amount is big, measure inaccurate, even stuck fault takes place, the overflow-type reflux ratio controller with separation covering dividing plate that adopts the present invention to propose after transforming has properly solved the difficult problem in the operation, realizes accurate measurement and the stable operating process of reflux ratio.

Two, produce the continued operation destilling tower of ethanol, former employing intermittence, pulsation, swinging-bucket type reflux ratio controller, the fluctuation of service of tower directly influences product quality, after technological transformation, the tool that adopts the present invention to propose hides the overflow-type reflux ratio controller of dividing plate from separation, because accurate measurement, reflux ratio is stable, and operation is normal, improve product quality, properly solved unborn production problem.

Claims

1. a destilling tower hides the overflow-type reflux ratio controller of dividing plate with transmission mechanism with having to separate, it is characterized in that separate to hide dividing plate be overflow ladle 105 and cushion collar bucket 109 with the middle part of the overflow-type reflux ratio controller of transmission mechanism and form cannelures with overcoat bucket 106 having, dividing plate 111 and hide dividing plate 114 cannelure is divided into two parts, bucket wall lower periphery at overflow ladle 105 is furnished with two holes, square weir of not waiting, two parts of the corresponding cannelure of difference, the constant output overflow area that corresponding angle is 15 ° of fixed angles links to each other with output pipe 110, another is that corresponding maximum angle is that the backflow overflow area of 125 ° of variable angles links to each other with return duct 112, in the outside of overflow ladle 105 cushion collar bucket 109 is housed, if desire changes reflux ratio, then will adjust and hide dividing plate 114 is relative position on 125 ° the hole, square weir at angle, it is by driving wheel 103 and follower 101 revolving sleeve 102 to be rotated, at the lower end of revolving sleeve 102 iron chains a pair of driving lever 108 is arranged, make and hide dividing plate 114 change relative positions, the realization reflux ratio is adjusted

2. according to the said overflow-type reflux ratio controller of claim 1, wherein saidly realize the reflux ratio adjustment, it is characterized in that adjusting range is 0.1～infinite reflux.