CN212039082U

CN212039082U - Rectifier for chemical production

Info

Publication number: CN212039082U
Application number: CN202020351723.7U
Authority: CN
Inventors: 崔雷; 陈雨晴; 徐瑞敏; 张静芳
Original assignee: Ningxia Dehao Technology Industry Co ltd
Current assignee: Ningxia Dehao Technology Industry Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-12-01
Anticipated expiration: 2030-03-19

Abstract

The utility model provides a chemical production's rectifier for the product after rectification xylol and oxygen oxidation reaction. The rectifier includes: the vertical rectification tank body is obliquely arranged on a plurality of rectification plates in the tank body, a first steam inlet is formed below the rectification plates, a rectification liquid outlet is formed in the bottom of the tank body, a gas outlet is formed in the top of the tank body, and a rectification liquid inlet is formed above the rectification plates.

Description

Rectifier for chemical production

Technical Field

The utility model relates to a chemical industry liquid phase splitter especially relates to a rectifier of chemical production.

Background

Rectification is a separation process in which the components of a mixture are separated by virtue of their different volatility, and is usually carried out in a plate-type rectification column. Gas-liquid two phases in the rectifying tower are contacted in a countercurrent way to carry out interphase heat and mass transfer. The volatile component in the liquid phase enters the gas phase, and the non-volatile component in the gas phase is transferred into the liquid phase, so that the nearly pure volatile component can be obtained at the top of the tower, and the nearly pure non-volatile component can be obtained at the bottom of the tower.

In the prior art, after a rectification liquid enters a tank body from a unique liquid inlet, the rectification liquid can only fall into a certain area of a rectification plate and cannot be uniformly sprayed on the whole rectification plate, so that the downward-moving liquid and the upward-moving steam are not in full contact, and the degree of separation of a gas phase and a liquid phase is low. And the reboiler is used for repeatedly heating and rectifying the feed liquid at the bottom of the tank body, so that the energy consumption is increased, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rectifier for chemical production, which solves the problems existing in the prior art.

The rectifier includes: the device comprises a vertical rectifying tank body, a plurality of rectifying plates, a first steam inlet, a rectifying liquid outlet, an air outlet and a rectifying liquid inlet, wherein the rectifying plates are obliquely arranged in the tank body; still be equipped with the liquid dispersion dish between the rectification inlet of jar internal portion and the rectification board, the liquid dispersion dish passes through extension bar and establishes the motor element fixed connection at jar body top, and the diameter of liquid dispersion dish slightly is less than the internal diameter of the vertical jar of body, and liquid dispersion dish bottom still is provided with a plurality of weeping apertures. So that the liquid firstly flows into the liquid dispersion plate and then drops to the rectifying plate.

Furthermore, the small liquid leakage holes are uniformly distributed in a fan-shaped area on the liquid dispersion disc 8, wherein the fan-shaped area takes the center of the disc as the vertex, so that liquid can drip on the whole rectifying plate when rotating along with the liquid dispersion disc.

Furthermore, a pipeline of the rectification liquid inlet extends a certain distance into the tank body.

Furthermore, in order to realize liquid phase reflux, a second steam inlet is further arranged below the rectifying plate and communicated with the top of the reboiler, and a throttling valve is further arranged on a pipeline for communicating the bottom of the reboiler with a rectifying liquid outlet.

Further, the gas outlet is communicated with a liquid inlet of the separator at the top of the liquid phase separator through a condenser.

Furthermore, the rectification liquid inlet is respectively communicated with the output ends of the main liquid inlet pump and the auxiliary liquid inlet pump.

Furthermore, in order to realize gas phase reflux, the input end of the auxiliary liquid inlet pump is communicated with the liquid storage tank, and the liquid storage tank is communicated with the liquid outlet of the separator.

The technical effects of the utility model reside in that: the rotatable liquid dispersing plate is arranged between the liquid inlet and the rectifying plate, and the liquid inlet pipeline is extended towards the inner part of the tank body, so that liquid passes through small liquid leakage holes in the liquid dispersing plate, uniformly drops on the rectifying plate and is in full contact with rising steam, the two separation degrees of gas and liquid are improved, the liquid material in unit volume can obtain a gas-liquid phase with higher purity after single distillation, and the frequency of starting a re-rectifying circulation loop due to insufficient purity of the phase material is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a rectifier and various pipelines related to the rectifier in the present invention.

Fig. 2 is a top view of the liquid dispersion plate of the present invention.

In the figure, 1, a rectifying tank, 2, a rectifying plate, 3, a first steam inlet, 4, a rectifying liquid outlet, 5, a gas outlet, 6, a rectifying liquid inlet, 7, a main liquid inlet pump, 8, a liquid dispersion disc, 9, a small liquid leakage hole, 10, a lengthening rod, 11, a motor assembly, 12, a reboiler, 13, a second steam inlet, 20, a liquid phase separator, 21, a separator liquid inlet, 22, a separator liquid outlet, 23, a condenser, 24, a liquid storage tank and 25, an auxiliary liquid inlet pump are arranged.

Detailed Description

The following describes an embodiment of the present invention with reference to fig. 1 and 2.

FIG. 1 illustrates the components of a rectifier and the components of a liquid phase reflux loop and a vapor phase reflux loop. Wherein the rectifier body includes: the device comprises a vertical rectifying tank 1 body, a plurality of rectifying plates 2 obliquely arranged in the tank body, a first steam inlet 3 arranged below the rectifying plates 2, a rectifying liquid outlet 4 arranged at the bottom of the tank body, an air outlet 5 arranged at the top of the tank body and a rectifying liquid inlet 6 arranged above the rectifying plates 2; a liquid dispersion disc 8 is also arranged between the rectification liquid inlet 6 and the rectification plate 2 in the tank body, the liquid dispersion disc 8 is fixedly connected with a motor assembly 11 arranged at the top of the tank body through an extension bar 10, the diameter of the liquid dispersion disc 8 is slightly smaller than the inner diameter of the vertical tank body, and a plurality of small liquid leakage holes 9 are also formed in the bottom of the liquid dispersion disc 8;

the liquid phase reflux loop of the rectifier comprises: a second steam inlet 13 is further arranged below the rectifying plate 2, the second steam inlet 13 is communicated with the top of a reboiler 12, and a throttle valve 14 is further arranged on a pipeline communicating the bottom of the reboiler 12 with the rectifying liquid outlet 4.

The gas phase reflux loop of the rectifier comprises: the gas outlet 5 is communicated with a separator liquid inlet 21 at the top of the liquid phase separator 20 through a condenser 23, the rectification liquid inlet 6 is respectively communicated with the output ends of a main liquid inlet pump 7 and an auxiliary liquid inlet pump 25, the input end of the auxiliary liquid inlet pump 25 is communicated with a liquid storage tank 24, and the liquid storage tank 24 is communicated with a separator liquid outlet 22.

Fig. 2 illustrates the distribution area of the small weep holes 9 on the liquid dispersion plate 8, and the small weep holes 9 are uniformly distributed in a fan-shaped area on the liquid dispersion plate 8 with the center of the disc as the vertex.

The working principle is as follows: the feed liquid to be rectified is sent into a liquid dispersion plate 8 in the rectifying tank 1 through a rectifying liquid inlet 6 by a main liquid inlet pump 7, a motor component 11 drives the liquid dispersion plate 8 to rotate through an extension rod 10, and the liquid uniformly drops to the surface of the rectifying plate 2 through a small liquid leakage hole 9. High temperature steam enters the tank from the first steam inlet 3 and gradually moves towards the top of the tank through the rectification plate. In the process of countercurrent flow of liquid and steam, gas-liquid phases are converged on the surface of each layer of rectifying plate, volatile components in the liquid phase enter the gas phase, nonvolatile components in the gas phase are transferred into the liquid phase, liquid phase materials are deposited at the bottom of the tank body, and gas phase materials rise to the top of the tank body.

The gas phase material on the top of the tank passes through the condenser 23 along the gas outlet 5 to be cooled, enters the liquid phase separator 20 through the liquid inlet 21 of the separator in a liquid state, and a part of liquid after separation flows out from the liquid outlet 22 of the separator to enter the liquid storage tank 24. Can detect it this moment to judge whether still need carry out the secondary rectification, if need, then start supplementary feed liquor pump 25, inject the feed liquid into rectifier tank 1 inside once more through rectification inlet 6.

And (3) manually sampling and detecting the liquid-phase material at the bottom of the tank, if the purity of the liquid-phase material cannot meet the process requirement and still needs to be further rectified, opening the throttle valve 14 to heat the liquid-phase material in the reboiler 12, and enabling the heated steam to enter the tank body again from the top of the reboiler 12 along the second steam inlet 13 for rectification.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A rectifier for chemical production, comprising: the device comprises a vertical rectifying tank (1) body, a plurality of rectifying plates (2) obliquely arranged in the tank body, a first steam inlet (3) arranged below the rectifying plates (2), a rectifying liquid outlet (4) arranged at the bottom of the tank body, a gas outlet (5) arranged at the top of the tank body and a rectifying liquid inlet (6) arranged above the rectifying plates (2);

the method is characterized in that: still be equipped with between the rectification inlet (6) of the internal portion of jar and the rectification board (2) and loose liquid dish (8), loose liquid dish (8) through extension bar (10) with establish motor element (11) fixed connection at jar body top, the diameter of loose liquid dish (8) slightly is less than the internal diameter of the vertical jar of body, loose liquid dish (8) bottom still is provided with a plurality of weeping apertures (9).

2. The rectifier according to claim 1, characterized in that said holes (9) are uniformly distributed in the sector area of the plate (8) with the center of the plate as the top.

3. The rectifier according to claim 2, characterized in that the pipe of the rectification inlet (6) extends into the tank.

4. The chemical production rectifier according to claim 1, wherein a second steam inlet (13) is further arranged below the rectifying plate (2), the second steam inlet (13) is communicated with the top of the reboiler (12), and a throttle valve (14) is further arranged on a pipeline communicating the bottom of the reboiler (12) with the rectifying liquid outlet (4).

5. The rectifier according to claim 1, characterized in that the gas outlet (5) is connected to the liquid inlet (21) of the liquid phase separator (20) via a condenser (23).

6. The rectifier of chemical production according to claim 1, characterized in that the rectification liquid inlet (6) is respectively communicated with the output ends of the main liquid inlet pump (7) and the auxiliary liquid inlet pump (25).

7. The rectifier according to claim 6, characterized in that the input of the auxiliary liquid pump (25) is connected to the liquid reservoir (24), and the liquid reservoir (24) is connected to the separator outlet (22).