Distribution chute and distribution system fluid

 

(57) Abstract:

The invention can be used in the chemical and refining industries. Distribution system fluid created by attaching with bolts gutters to the wells using the internal flange formed on the grooves in the flanging inner end sections of the sides and base of the trench and welding flanged end sections and has high integrity. 2 C. p. F.-ly, 4 Il.

The present invention relates to the creation of internal structures, which are often referred to as "tower intervals and are used in tanks used in chemical and oil refineries to perform operations mass transfer and heat transfer, such as distillation, separation into fractions, absorption, gas cleaning, the contact filtration, distillation light ends and quenching (quenching). The present invention particularly relates to the creation of devices for the distribution of fluids in the upper parts of these towers (columns) so that the liquid is evenly sprayed on the surface of mass transfer. Such devices are commonly referred to as "wells" or "of through holes in the base and the side walls of the pit or trench. Wells are the main pipelines for liquids and they usually produce liquid distribution for a number of side channels, branches off from the well and called gutters (trays). In the case when the tower has only one well, it usually goes across the diameter of the tower and there is nothing except him, and the size of the well is approximately from 1 to 4 meters or more. Tower of larger diameter can have two parallel wells that go on chords of the cross-section of the tower and are shorter than the full diameter. This is done because the wells are needed to handle the full volume of liquid and the weight of the fluid can create excessive stress in the structure. The number of lateral grooves distributing fluid from a well depends on the size of the tower, but usually on each side of the well depart two or three lateral gutters.

Typically, the cross section of the wells and troughs are U-shaped, but they may also have a V-shaped base. The wells are usually made of straight line segments with joints (connections), and joints with lateral distribution grooves are arranged at equal intervals at right angles to the axis of the well. Typically, these joints done is with the corresponding hole, carved on the side wall of the well, and a flange screwed to the well with bolts and placing spacers between the contacting surfaces to prevent leakage. This construction creates a number of problems, and the flange is typically made of material of larger gauge (gauge) than the material of the gutter to ensure the rigidity of the connection (joint) and to prevent bending that could cause failure of the weld. Violation of the integrity of the weld is also a problem because it leads to leakage and requires constant maintenance (control) distribution system.

Another drawback of the connection welded flange larger caliber with a thin groove is that it leads to warping of the material of the gutter. In addition to the fact that it is difficult to provide an accurate linear arrangement of the flange and the groove, found that such a connection is critical at the limiting characteristics of the liquid distribution system of wells and trenches. In the past, any inaccurate alignment of the parts of the connection (joint) resulted in alteration with increasing cost of production or increased costs during construction works. In the case when raspini to use of expensive corrosion-resistant metals. Elimination of the metal flange to the high calibre and elimination of related transactions welding leads to a significant reduction of costs without reducing the quality characteristics.

In connection with this there is a need for a system connection gutters, which did not involve the use of expensive and time-consuming welding or application of the flanges great caliber for the communication. This system suggested in the present invention.

In accordance with the present invention offers a distribution chute that is designed for connection with a flat surface element with the specified trench includes opposing confining (host) wall and base that unites these confining walls at their lower ends, at least one of the ends of the gutter modified by incorporating an internal flange on the inside of the gutter, which is designed for connection by bolts to the element, which must be connected trough.

The inner flange, as is evident from the legend goes inside the chute from its confining walls and from the base and forms a continuous the x right angle internal deformation (otgibom) of one of the sections of each wall, adjacent to the end and base of the trench, between these areas. However, one of the parts of the flange or the flange whole can be manufactured by welding one or more plates, creating an alternative to internal deformation at right angles to the walls or Foundation of the items mentioned above. However, this design does not provide the full advantage of opportunities to minimize the length of the weld at each joint (the joint).

It should be borne in mind that the present invention is equally applicable for the connection of wells with other elements, and is used in the description of the invention, the term "groove" has a generic meaning of the pipe for the liquid, and not a specific meaning in the context described here using it.

The element to which must be attached to the gutter, can represent another gutter with similarly modified end. It may be well with the corresponding window cut through the confining wall, and in this case, the modified end is attached by means of screw connection to the site confining wall of the well, the bounding box. This element can also be a to the UNT can also be an item of equipment, through which is distributed in the fluid system of gutters. This nature of the element, which is connected to the chute does not create any fundamental limitation of the present invention.

The inner fold confining walls and base of the trench is usually accompanied by folding (flared) section of the material of the wall and the base, adjacent to the seam. This crimping may be left protruding into the inside of the gutter, or it can be made flat by padding to the wall or Foundation. In the case when for the manufacture of gutters allocator used typical sheet metal, such flared difficult to implement and therefore the material must form a fold, mostly cut out before the formation of a fold, such that the deformable inner side wall and base come together in a way that it allows you to connect them together tight. This connection can be performed by using a sealant, but usually it is produced by welding, if the chute is made of metal. Thus, the only seam in the design of the flange of the gutter, which requires sealing, is the inner joint of the gutter. In this way can the warping of the gutter.

An alternative and often predominantly connection between confining walls and base of the trench can be made by cutting out the side walls, which abortivas inside, followed by crimping to the inside of the base so that it overlaps the flanged inward parts confining walls. Obviously, the order of operations flanging can be inverted with the same effect. In some cases, the line of contact between the confining walls and the inverted base of the trench can be properly sealed, for example, linear welding.

Internal flange which is formed as described above, may be provided with holes adapted for input of bolts by means of which the inner flange can be connected with any desired element. In the case where the response element is the main well, the base of the trench should be at a lower level than the base of the hole (window) in the confining wall of the well. In the case when two segments of the gutter should be connected end to end, preferably the provision of additional holes in contacting the inner flanges for ravnomerno, the C which is usually made from the chute of the dispenser, is metal, and the technology of communication is particularly well suited for such material. But it can be used in some applications and plastics, in accordance with the present invention can be applied termoregulirovanija (or molding on the place of use) inner flange (as a replacement technology used for metals), instead of welding to seal applied sealants.

In Fig. 1 shows a cross-section of the well and gutters, which are connected in accordance with the present invention. The cross-section carried out on the level, showing the hole for communication between the well and the gutter.

In Fig. 2 shows a front view of the end of the chute shown in Fig. 1, before his accession to the well.

In Fig. 3 shows a side view of the well shown in Fig. 1, before the accession of the gutter.

In Fig. 4 shows a cross section of the well and gutters, the design of which is similar to the one shown in Fig. 1, except that the well has openings for attachment of the two chutes, one of which closed end of plastino the th description shown with reference to the accompanying drawings, and from the audits gutters for leaks.

In Fig. 1 and 4 show the well 1, which is connected to the chute 2. Open ends well and trough are closed by the end plates 3. End plates 3 are attached by bolts (not shown) directed to the inside vertical oscam 4, available at the ends of the vertical walls of the trench and the well, and directed to the inside horizontal oscam 5, located along the base of the trench and the well. In Fig. 2 you can see that the ears are cut so that together the two ear wall and the ear Foundation form a continuous flange for welding the contacting edges of the weld lines 6. Similar flanges are provided at either end of the well and at the opposite end of the gutter.

In Fig. 3 shows a lateral wall of the well before the accession of the end shown in Fig. 2 gutters. Window 8 in the wall of the well is intended to provide communication with the chute when it is attached by bolts in place using the bolt holes 7.

Flat end plates 3 (Fig. 1) connect using bolts with internal flanges at the open ends of the wells and troughs.

Well they are what,6 cm, the depth of 38.1 cm, and in the case of angled end the greatest length of 54.4 cm and the shortest length 34,45 see For the manufacture of both end plates, wells and troughs used stainless steel. Since the objective is to evaluate the integrity of the system connections (i.e., the degree of infiltration in the area of the junction), then the usual holes in the well and the groove absent. Otherwise used such materials and compounds that are used in practice.

Before the introduction of the bolts produced spraying glue on the flanges and on the surface, covered with a layer of glue, apply the sealing material, the top layer of sealing material is also covered with glue. Make careful sealing of the joint by using a sealing material. For the liberation of holes for the passage of bolts in the sealing material using a screwdriver.

The flanges at the ends of the chutes connected to end plates by means of bolts 1"X3/8". The bolts at the base have a washer 3/8" on both sides; the tightening force of the bolts was 14 ft-lbs. This was followed by re-inspection. The ends of the bolts in the closed end of the trench was cut at an acute angle flush.

The pit and the groove separalion hours the water level fell to 32.3 see This gives the rate of leakage for junction only 0,00083 gallon/min/ ft. For this design it is a very satisfactory result.

The above experiment was repeated on a larger scale using a shown in Fig. 4 designs. This design had a similar run of flanges that are formed are connected together by welding vertical cheeks 4 and cheeks base (not shown), and connected with them bolted end plates 3. The chute 2 is attached by screws to the side wall of the well 1 around Windows 8 in the specified side wall through which fluid can flow from the well into the chute. In addition, in the opposite wall there is a similar hole, a closed end plate. In Fig. 4 different points of possible leakage indicated by letters A, b, C, D and E. the leakage points A and D of the end plate is fixed by 8 screws, 4 along each vertical cheeks. At points b, C, and E are 9 bolts, one bolt added along the edges of the base in each case (below the window in case of leakage points (E) to the four bolts along the vertical scale (or in two vertical lines on each side of the window in case of leakage points (E).

The operation of the Assembly of this system analogy in the large system voltage, than they can be created by filling the gutters with water, were used two boxes on two cubic feet, which were delivered to the chute at a distance of 10 inches from the junction of the chute with a well (point D in Fig. 4); however, at point D was created point loading 384 lb. In this case, system integrity may be checked in more severe conditions than those encountered in use.

After one hour leak in each of the leakage points were: A . . . 435 ml; ... 400 ml; ... 675 ml; D ... 590 ml; E ... 675 ml This gives the calculated leak rate for the interface, which is 0,000825 gpm/ft.

Since the dimensions of the structures were much larger than in the example above (the length of the well 183 cm, width of 15.24 cm and depth 39.3 cm; length of the trough 183 cm, width of 14.3 cm and depth 36,1 cm), the results need to recognize consistent and very satisfactory.

1. A distribution chute that is designed to connect with having a flat surface element and includes opposite confining wall and the Foundation, United with these confining walls at their lower ends, wherein at least one end of the lead is passed trough must be connected, moreover, the flange formed by the inner flanging the ends of the confining walls and base of the trench.

2. Distribution system fluid, which includes a Central well having a base and walls, which contain a number of apertures, characterized in that it includes many runners under item 1, which is attached to the walls of the well so that there is flow of fluid from the well into the chute through these holes in the walls of the well.

 

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