Hydrocyanic acid rectification equipment

Abstract

The utility model relates to the technical field of rectification equipment, and particularly discloses hydrocyanic acid rectification equipment which comprises a tower body, a tower tray structure arranged in the tower body, a spraying structure arranged at the top of the tower and a liquid separation structure arranged at the bottom in the tower body, the liquid separation structure comprises a connecting ring table fixed on the inner wall of the tower body and a plurality of first separation plates fixed in the connecting ring table, and the bottom surfaces of the first separation plates are not in contact with the inner bottom surface of the tower body. The problems that hydrocyanic acid is easy to polymerize at the tower bottom and hydrocyanic acid residues exist exist.

Description

Technical Field

[0001] The present application relates to the technical field of distillation equipment, and specifically discloses a hydrocyanic acid distillation equipment. Background Art

[0002] Hydrocyanic acid, also known as hydrogen cyanide (HCN), is a basic chemical raw material with a wide range of uses. It can be used in the manufacture of acrylonitrile, acrylic resin and pesticides.

[0003] In the production process of hydrocyanic acid, a hydrocyanic acid distillation process is applied, and the distillation process of hydrocyanic acid is implemented in a distillation tower. In the prior art, the distillation tower used in the distillation process of hydrocyanic acid is similar to other commonly used distillation tower structures, including a tower body and a tower plate installed in the tower body.

[0004] However, during the distillation process of hydrocyanic acid, since hydrocyanic acid is prone to polymerization and explosion after polymerization, it is necessary to introduce an inhibitor.

[0005] In the prior art, a solution containing a trace amount of hydrocyanic acid is usually accumulated at the bottom of the tower body after distillation, and the distillation cannot be completed.

[0006] Therefore, in view of this, the inventor provides a hydrocyanic acid distillation device to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the problems that in a traditional distillation tower used in hydrocyanic acid production, hydrocyanic acid is easily polymerized at the bottom of the tower and hydrocyanic acid remains during the distillation process.

[0008] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a hydrocyanic acid distillation equipment, including a tower body, a tower plate structure arranged in the tower body and a spray structure arranged on the top of the tower, and also includes a liquid separation structure arranged at the bottom of the tower body, the liquid separation structure includes a connecting ring platform fixed on the inner wall of the tower body and a plurality of first separation plates fixed in the connecting ring platform, and the bottom surface of the first separation plate does not contact the bottom surface of the tower body.

[0009] Furthermore, the liquid separation structure also includes a plurality of second separation plates fixed in the connecting ring platform, the first separation plates and the second separation plates are arranged alternately, and the bottom surface of the second separation plates does not contact the bottom surface of the tower body.

[0010] Furthermore, a plurality of rectangular gaps are formed between the first sub-plate and the second sub-plate.

[0011] Furthermore, triangular pyramid blocks are disposed on the top surfaces of the first sub-plate and the second sub-plate, and the top edges of the triangular pyramid blocks face upward.

[0012] Furthermore, a plurality of communicating water holes are formed through the first sub-plate and the second sub-plate.

[0013] Furthermore, the tower tray structure includes a plurality of tower trays sequentially arranged in the tower body, and a plurality of downcomers with outlet weirs sequentially fixed between adjacent tower trays, and a plurality of through holes are formed through the tower trays.

[0014] The principle and effect of this scheme are:

[0015] 1. Compared with the prior art, the utility model is provided with a liquid separation structure at the bottom of the tower body, and the hydrocyanic acid solution at the bottom of the tower body is divided into several parts by the liquid separation structure to reduce the possibility of hydrocyanic acid polymerization, and heat conduction can be carried out by connecting the ring table and the first dividing plate, so that the heat can be transferred to the inside and the bottom of the solution, accelerating the evaporation and distillation efficiency of the hydrocyanic acid in the solution, and solving the problem that the traditional distillation tower used for hydrocyanic acid production is easy to polymerize at the bottom of the tower and the existence of hydrocyanic acid residue during the distillation process.

[0016] 2. Compared with the prior art, in the tower tray structure of the utility model, the downcomer installed between adjacent tower trays passes through the tower trays to separate the chambers above the tower trays to facilitate liquid phase diversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a hydrocyanic acid distillation device proposed in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of a hydrocyanic acid distillation device proposed in an embodiment of the present application is shown;

[0020] Figure 3 A partial schematic diagram of a hydrocyanic acid distillation device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] The reference numerals in the drawings of the specification include: tower body 1, air inlet 2, liquid inlet 3, gap 4, first sub-plate 5, through hole 6, tower plate 7, spray structure 8, triangular frustum 9, connecting ring platform 10.

[0023] A hydrocyanic acid distillation device, for example Figure 1 As shown:

[0024] The tower body 1 comprises a tower body 1 , a spray structure 8 installed on the top of the tower body 1 , a tower tray structure installed inside the tower body 1 below the spray structure 8 , and a liquid separation structure installed at the bottom of the tower body 1 .

[0025] The top of the tower body 1 is provided with a liquid inlet connected to the spray structure 8, the bottom side above the liquid separation structure is provided with a gas inlet, and the bottom of the tower body 1 below the liquid separation structure is provided with a liquid outlet. The spray structure 8 is a liquid spraying structure commonly used in the prior art.

[0026] like Figure 2 As shown, the tray structure includes a plurality of trays 7 fixedly installed in the tower body 1 and a downcomer installed between adjacent trays 7. In this embodiment, a plurality of through holes 6 are opened through the tray 7, and a downcomer with an outlet weir is provided between adjacent trays 7, and the bottom end of the downcomer is fixed to the tray 7 below. The downcomer separates the chamber above the tray 7 to facilitate liquid phase diversion and liquid flow down to prevent liquid accumulation.

[0027] like Figure 1 and Figure 3 As shown, the liquid separation structure includes a connecting ring 10 fixedly mounted on the inner wall of the bottom of the tower body 1, four first dividing plates 5 fixedly mounted on the inner side of the connecting ring 10, and four second dividing plates fixedly mounted on the inner side of the connecting ring 10. The first dividing plates 5 and the second dividing plates are staggered and vertically distributed to each other, and a rectangular gap is formed between adjacent first dividing plates 5 and second dividing plates. A first connecting groove is opened on the top of the first dividing plate 5, and a second connecting groove is opened on the second dividing plate. The second connecting groove is opened upward from the bottom of the second dividing plate so that the second connecting groove on the top can be placed in the first connecting groove, and the top of the second dividing plate is flush with the top of the first dividing plate 5.

[0028] In this embodiment, the bottom of the first sub-plate 5 and the end surface of the bottom of the second sub-plate are not in contact with the inner bottom surface of the tower body 1, so as to form a gap 4 for the remaining solution to be discharged. In addition, a plurality of connecting water holes are formed through the first sub-plate 5 and the second sub-plate, and a triangular pyramid block is integrally formed on the top of the first sub-plate 5 and the top of the second sub-plate, and the top edge of the triangular pyramid block faces upward.

[0029] Moreover, in this embodiment, acetic acid is used to replace the original inhibitor: sulfuric acid, and the polymerization time of hydrocyanic acid is further delayed by acetic acid, thereby reducing the subsequent wastewater discharge.

[0030] When the utility model is used, a liquid separation structure is arranged at the bottom of the tower body 1, and the hydrocyanic acid solution at the bottom of the tower body 1 is divided into several parts by the liquid separation structure to reduce the possibility of hydrocyanic acid polymerization. The heat can also be transferred to the inside and the bottom of the solution by connecting the ring platform 10 and the first dividing plate 5 for heat conduction, so as to accelerate the evaporation and distillation efficiency of the hydrocyanic acid in the solution, thereby solving the problem that the hydrocyanic acid is easy to polymerize at the bottom of the tower and the hydrocyanic acid residue exists during the distillation process in the traditional distillation tower used for hydrocyanic acid production.

[0031] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydrocyanic acid distillation device, comprising a tower body, a tray structure arranged in the tower body and a spray structure arranged at the top of the tower, characterized in that: It also includes a liquid separation structure arranged at the bottom of the tower body, which includes a connecting ring platform fixed on the inner wall of the tower body and a plurality of first separation plates fixed in the connecting ring platform, and the bottom surface of the first separation plate does not contact the bottom surface of the tower body.

2. A hydrocyanic acid distillation equipment according to claim 1, characterized in that: The liquid separation structure also includes a plurality of second separation plates fixed in the connecting ring platform, the first separation plates and the second separation plates are arranged alternately, and the bottom surface of the second separation plates does not contact the bottom surface of the tower body.

3. A hydrocyanic acid distillation equipment according to claim 2, characterized in that: A plurality of rectangular gaps are formed between the first sub-plate and the second sub-plate.

4. A hydrocyanic acid distillation equipment according to claim 2, characterized in that: The top surfaces of the first sub-plate and the second sub-plate are both provided with triangular pyramid blocks, and the top edges of the triangular pyramid blocks face upwards.

5. A hydrocyanic acid distillation equipment according to claim 2, characterized in that: The first sub-plate and the second sub-plate are both provided with a plurality of communicating water holes.

6. A hydrocyanic acid distillation equipment according to claim 1, characterized in that: The tower tray structure comprises a plurality of tower trays sequentially arranged in the tower body, and a plurality of downcomers with outlet weirs sequentially fixed between adjacent tower trays. The tower trays are all provided with a plurality of through holes.

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