CN206730803U - A kind of graphite falling film absorber - Google Patents

Abstract

The utility model discloses a graphite falling film absorber, which comprises a feeding section connected up and down and a cooling and absorbing section, a graphite block is arranged in the cooling and absorbing section, a material hole penetrating up and down is opened on the graphite block, and there is a horizontal opening with a Cooling holes where the material holes are not connected; a graphite cylinder is arranged in the feeding section, the lower end surface of the graphite cylinder is sealed against the upper end surface of the graphite block, and the upper end surface of the graphite cylinder body is arranged along the height direction. An annular groove, which divides the cylinder into an inner cylinder and an outer cylinder located outside the inner cylinder; the upper end of the inner cylinder is formed as a triangular weir; a liquid inlet is provided in the feeding section, and the liquid inlet is connected to the annular groove; The feeding section is also provided with a graphite cover plate covered on the graphite cylinder, and the graphite cover plate is provided with an air inlet connected to the graphite cylinder. The utility model can make the absorbing liquid evenly distributed to the inner cavity of the graphite cylinder, and then enter into the material hole of the graphite block.

Description

A graphite falling film absorber

technical field

The utility model relates to a graphite falling film absorber.

Background technique

Graphite absorber is the reactor that is used to produce acids such as hydrochloric acid, at present, please refer to Fig. 2, and conventional graphite falling film absorber is all provided with and comprises graphite tube 100 and is used for gas, the upper end of liquid feeding, in The graphite cylinder 100 is provided with an annular groove 101 with its opening facing downward. The liquid inlet 102 is connected to the annular groove 101. The absorption liquid enters the upper head from the liquid inlet through the annular groove 101, and the gas passes through the gas inlet 104 on the top of the graphite absorber. Into the upper head, together with the absorption liquid, enter the graphite block absorption and condensation section through the overflow pipe 103 for contact absorption and cooling.

Since the opening of the annular groove faces downward, the absorption liquid entering from the liquid inlet 102 will immediately sink into the mixing chamber near the liquid inlet under the action of gravity, which not only causes uneven distribution of the liquid in the overflow pipe area, but also causes As a result, there is no absorption liquid distribution in part of the overflow pipe, and some material holes in the graphite block have no absorption liquid to form a film distribution, resulting in a decline in the efficiency of the graphite falling film absorber, and the falling film absorption function of the graphite falling film absorber cannot be fully exerted.

Utility model content

The purpose of this application is to solve the above problems, to provide a graphite falling film absorber capable of giving full play to the function of the absorber, to avoid the phenomenon that there is no absorbing liquid or less absorbing liquid in some material holes, and the specific technical scheme is as follows:

A graphite falling film absorber, which includes a feed section connected up and down and a cooling absorption section, a graphite block is arranged in the cooling absorption section, a material hole penetrating up and down is opened on the graphite block, and a material hole that is not connected to the material hole is opened horizontally. The cooling hole; a graphite cylinder is arranged in the feeding section, the lower end surface of the graphite cylinder is sealed against the upper end surface of the graphite block, and the inner peripheral surface of the graphite cylinder and the space surrounded by the upper end surface of the graphite block form a The mixing chamber is provided with an annular groove on the upper part of the graphite cylinder, the annular groove is formed by the upper end surface of the cylinder being concaved downward along the height direction, and the annular groove divides the upper part of the cylinder into an inner cylinder and a The outer cylinder on the outside of the inner cylinder; the upper end of the inner cylinder is formed as a triangular weir; a liquid inlet is provided in the feeding section, and the liquid inlet is connected to the annular groove; a cover on the graphite cylinder is also provided in the feeding section A graphite cover plate is provided with an air inlet connected to the inner cavity of the graphite cylinder.

In the utility model, the outlet of the annular groove is set upward, and after the absorption liquid enters the annular groove from the liquid inlet, it will be distributed along the annular groove. When the absorption liquid fills the annular groove, it overflows from the top surface of the inner cylinder to the graphite cylinder Inside, since the absorption liquid overflows into the mixing chamber along the top surface of the inner cylinder, the absorption liquid can be evenly distributed into the mixing chamber, and then enters into the material holes of the graphite block. In the utility model, the top surface of the inner cylinder is also set as a triangular weir, and the triangular weir can make the absorption liquid overflow into the mixing chamber more uniformly.

Further, the top end surface of the inner cylinder is lower than the top end surface of the outer cylinder, and the graphite cover plate abuts against the top end surface of the outer cylinder. This design can ensure that the top surface of the inner cylinder has a certain height of liquid film, so that the absorption liquid can evenly enter the mixing chamber.

Further, an overflow pipe is provided on the upper end surface of the graphite block, and the inner cavity of the overflow pipe communicates with the material hole. The setting of the overflow pipe can ensure that there is a certain amount of liquid at the bottom of the inner cavity of the graphite cylinder, so as to ensure the contact time between gas and liquid and improve the efficiency of gas-liquid mixing.

The utility model can evenly distribute the absorption liquid along the inner wall circumference, improve the uniform liquid distribution effect of the overflow pipe, and increase the falling film absorption capacity of the complete equipment; at the same time, it also increases the absorption area and avoids the impact of high-temperature gas on the graphite cylinder. damage, protecting the graphite cylinder.

Description of drawings

Fig. 1 is the schematic diagram of the utility model.

Figure 2 is a partial view of a graphite absorber in the prior art.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1:

Please refer to Fig. 1, a kind of graphite falling film absorber, it comprises the feeding section that connects up and down and cooling absorption section, is provided with graphite block 21 in cooling absorption section, offers the material hole 23 that runs through up and down on graphite block 21, horizontal A cooling hole 22 not connected to the material hole 23 is provided; a graphite cylinder 10 with upper and lower openings is arranged in the feeding section, and the lower end surface of the graphite cylinder 10 is sealed against the upper end surface of the graphite block 21, and the graphite cylinder The space surrounded by the inner peripheral surface of 10 and the upper end surface 24 of the graphite block forms a mixing chamber, and an annular groove 11 is arranged on the upper part of the cylinder body of the graphite cylinder 10, and the annular groove 11 is formed by the upper end surface of the cylinder body along the height The direction is concave downward, and the annular groove 11 divides the upper part of the cylinder body into an inner cylinder 16 and an outer cylinder 15 located outside the inner cylinder 16; the upper end of the inner cylinder 16 is formed as a triangular weir 14; Liquid inlet 12, liquid inlet 12 communicates with annular groove 11; Also be provided with the graphite cover plate 19 that is covered on the graphite cylinder 10 in the feeding section, offer the inner cavity that communicates with graphite cylinder on this graphite cover plate 19 The air inlet 17, that is, the air inlet 17 communicates with the mixing chamber.

In this embodiment, the top surface of the inner cylinder 16 is lower than the top surface of the outer cylinder 15 , and the graphite cover plate 19 abuts against the top surface of the outer cylinder 15 . An overflow pipe 13 is arranged on the upper surface of the graphite block 21 , and the inner cavity of the overflow pipe 13 communicates with the material hole 23 .

The distance L between the top of the triangular weir and the lower end surface of the graphite cover plate is 30-60 mm, and the height of the triangular weir is 40-60 mm. Specifically in this embodiment, L is 50 mm, and the height of the triangular weir is 60 mm.

The depth A1 of the annular groove is 35-55% of the distance A2 from the top end surface of the inner cylinder to the upper end surface of the graphite block. Specifically, A1 is 45% of A2 in this embodiment.

When this embodiment is in operation, the gas enters the mixing chamber from the air inlet 17, the absorption liquid enters the annular groove 11 through the liquid inlet 12, and then overflows into the mixing chamber along the triangular weir 14, and in the mixing chamber, After the absorption liquid and gas are mixed, they enter into the material hole 23 through the overflow pipe 13, and then are discharged through the liquid outlet 18 at the lower end of the graphite falling film absorber. The cooling liquid enters the cooling hole 22 of the graphite block 21 through the refrigerant inlet 32 , exchanges heat with the liquid in the material hole, and is discharged through the refrigerant outlet 34 .

Claims (3)

1. a graphite falling film absorber, is characterized in that, comprises the feeding section that connects up and down and the cooling absorption section, is provided with graphite block at the cooling absorption section, offers the material hole that runs through up and down on the graphite block, and horizontally offers and is provided with A cooling hole where the material hole is not connected; a graphite cylinder is arranged in the feeding section, the lower end surface of the graphite cylinder is sealed against the upper end surface of the graphite block, and the inner peripheral surface of the graphite cylinder and the upper end surface of the graphite block are formed The enclosed space forms a mixing chamber, and an annular groove is arranged on the upper part of the graphite cylinder, the annular groove is formed by the upper end surface of the cylinder being concave downward along the height direction, and the annular groove divides the upper part of the cylinder It is an inner cylinder and an outer cylinder located outside the inner cylinder; the upper end of the inner cylinder is formed as a triangular weir; a liquid inlet is provided in the feeding section, and the liquid inlet is connected to an annular groove; a cover is also provided in the feeding section The graphite cover plate on the graphite cylinder is provided with an air inlet connected to the inner cavity of the graphite cylinder. 2 . The graphite falling film absorber according to claim 1 , wherein the top end surface of the inner cylinder is lower than the top end surface of the outer cylinder, and the graphite cover plate abuts against the top end surface of the outer cylinder. 3 . 3. The graphite falling film absorber according to claim 1, characterized in that an overflow pipe is arranged on the upper surface of the graphite block, and the inner chamber of the overflow pipe communicates with the material hole.