CN2251708Y - Connecting box and box bady separated sweat condensing box - Google Patents

Abstract

The utility model relates to a hot-melt condensing box with a connecting box and a box body which are separated from each other. The utility model mainly improves the part of hot and cold carrier devices. The part of hot and cold carrier devices is composed of a plurality of groups of basic units. Each basic unit comprises a U-shaped tube, a tube sheet, a head of a tube box, and a baffle plate, wherein, the U-shaped tube is provided with fins. The utility model is characterized in that the opening end of each U-shaped tube penetrates through each tube plate and continuously extends away from the tube plate, and the opening end is welded on each baffle plate. A connecting box is formed between each head of a tube box and each baffle plate. The baffle plate separates each connecting box into an inlet and an outlet sections, and each tube plate is used as a wall of a box body. Because the connecting box is separated from the box body, carriers of steam or water in the connecting box can not flow into the box body from cracked weld beads between the U-shaped tubes and the baffle plates or be mixed with 2, 5-Isobenzofurandione in the box body, so accidents are avoided.

Description

Connect the hot-melt condensation box that case separates with casing

The utility model is a kind of chemical industry equipment, particularly a kind of hot-melt condensation box that is used to produce special uses such as phthalic anhydride, cis-butenedioic anhydride.

Hot-melt condensation box is a phthalic anhydride, indispensable key equipment in the production processes such as cis-butenedioic anhydride, mainly be by casing, material (phthalic anhydride, cis-butenedioic anhydride etc.) turnover part, cold and hot carrier arrangement partly waits composition, its effect is the steam state phthalic anhydride that oxidation reaction in the production process generates to be cooled to about 60 ℃ sublimate into needle-like solid, and then be heated to about 150 ℃ and be fused into liquid, to reach the purpose of collecting and being convenient to go on foot down processing, its cold and hot carrier, traditional mode is to adopt conduction oil, the shortcoming of this mode of heating is: equipment investment is big, conduction oil unit price height, consumption is big, easily aging, oil circuit and existence race when maintenance, emit, leak, drip phenomenon, cause environmental pollution, all adopted vapour one water to replace heat-conducting oil heating abroad now, water, vapour is cold and hot carrier, adopt this carrier, the cold and hot carrier arrangement part of hot-melt condensation box is by the U-shaped pipe, tube sheet, the bobbin carriage head, dividing plate is formed, play the support fixation effect by gripper shoe between the U-shaped pipe, have fin on the U-shaped pipe, the openend of U-shaped pipe is welded on the tube sheet, tube sheet and bobbin carriage head constitute even case, its inner-use clapboard separated into two parts, dividing in addition on the bobbin carriage head does not have into, outlet, the U-shaped pipe of tube sheet inboard is outward the material phthalic anhydride that is heated or cooled or cis-butenedioic anhydride etc., tube sheet described here is box body wall, as can be seen, casing is allo with connecting case, carrier steam, water enters the U-shaped pipe from connecting in the case, reaches heating or cooling purpose.But there is a following difficult problem in this kind frame mode always, it is exactly the weld seam between tube sheet and U-shaped pipe, ftractureed easily by the frequent cold and hot influence of rising of contracting, the vapour, the water that connect in the case enter in the casing of tube sheet inboard by weld crack, contact with the outer phthalic anhydride of U-shaped pipe etc., cause and catch fire in the hot-melt condensation box, produce massive losses, because phthalic anhydride and by product are met behind water or the water vapour and iron generation chemical reaction, generate the extremely low ferrous salt of burning-point under higher temperature.And the crack of welding often is not easy to find, so above-mentioned accident takes place unavoidably.

The purpose of this utility model is to overcome the deficiency that above-mentioned technology exists, and changes the version of its cold and hot carrier arrangement part, and carrier vapour, water can not be entered in the hot-melt condensation box casing, avoids the generation of accident.

The purpose of this utility model realizes in the following way:

Connect the hot-melt condensation box that case separates with casing, mainly comprise casing, material import and export, cold and hot carrier arrangement part, cold and hot carrier arrangement part is formed by the combination of many groups elementary cell, each elementary cell comprises U type pipe, tube sheet, bobbin carriage head, dividing plate, have fin on the U-shaped pipe, its technical characterstic is that the openend of U-shaped pipe passes tube sheet continuation extension away from tube sheet, be welded on the baffle plate, the company's of formation case between bobbin carriage head and baffle plate, dividing plate is divided into into and out of two parts company's case, and described tube sheet is box body wall.

Below in conjunction with description of drawings:

Fig. 1 is the utility model contour structures schematic diagram.

Fig. 2 is the cold and hot carrier arrangement structural representation of the utility model.

Among the figure: 1 U-shaped pipe, 2 support plates, 3 tube sheets, 4 baffle plates, 5 bobbin carriage heads, 6 dividing plates, 7 fins, 8 cold and hot carriers advance or export, 9 casings, 10 material inlets, 11 material outlets, 12 supports.

As Fig. 2, U-shaped pipe 1 still is welded on the tube sheet 3, openend continues to extend away from tube sheet, be welded on then on the baffle plate 4,5 companies of formation of baffle plate 4 and bobbin carriage head case, dividing plate 6 company's of making casees are separated into two parts, and the bobbin carriage headband of each part has into or exports 8, the other parts of whole hot-melt condensation box are identical with prior-art devices, and its using method does not change.By finding out among the figure, the part that the U-shaped pipe extends outside tube sheet places space outerpace, even connect the weld cracking between interior U-shaped pipe of case and baffle plate, vapour or water can only enter in the space outerpace along the crack, can not enter outside the U-shaped pipe of tube sheet inboard (casing in), promptly can not contact with material such as phthalic anhydride.Also apparent, when the generation weld bond leaks outside, just can observe in the chest outside, can overhaul immediately.

Consider the saving of material and the convenience of making, U-shaped tube opening end is best away from tube sheet 110mm.

Advantage of the present utility model:

Hot-melt condensation box of the present utility model, casing with connect case and separate cold and hot carrier water, vapour Can not enter in the hot-melt condensation box and the mixed chance such as phthalic anhydride, avoid the generation of great accident, the U-shaped pipe During the weld cracking of opening end, outside case, observe easily, can immediately overhaul.

Claims (1)

1, connect the hot-melt condensation box that case separates with casing, mainly comprise casing (9), material import and export, cold and hot carrier arrangement part, cold and hot carrier arrangement part is formed by the combination of many groups elementary cell, each elementary cell comprises U type pipe (1), tube sheet (3), bobbin carriage head (5), dividing plate (6), have fin (7) on the U-shaped pipe, the openend that it is characterized in that U-shaped pipe (1) passes tube sheet continuation extension away from tube sheet (3), be welded on the baffle plate (4), the company's of formation case between bobbin carriage head (5) and baffle plate (4), dividing plate (6) company of making case is divided into into, go out two parts, described tube sheet (3) is box body wall.

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