CN218962167U

CN218962167U - Impurity removing device for tower bottom liquid of methanol recovery tower

Info

Publication number: CN218962167U
Application number: CN202223301709.4U
Authority: CN
Inventors: 马海江; 杨金玉; 李锴; 庾石松
Original assignee: Hebei Nanhong New Energy Technology Co ltd
Current assignee: Hebei Nanhong New Energy Technology Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-05
Anticipated expiration: 2032-12-07

Abstract

The utility model belongs to the field of pretreatment devices of tower bottoms of methanol recovery towers, and particularly relates to a device for removing impurities from the tower bottoms of the methanol recovery towers, which is connected in series between an input end of the methanol recovery towers and a tail gas output end of a reaction kettle, wherein the device for removing impurities comprises a tank body and impurity removing plates arranged in the tank body, the impurity removing plates are obliquely arranged in the tank body from bottom to top in a plurality of groups, the tank body is provided with an air inlet and an air outlet, the air inlet is connected with the tail gas output end of the reaction kettle, and the air outlet is connected with the input end of the methanol recovery towers. The initial water methanol gas containing acid of reation kettle passes through the jar body, separates oil and sulphuric acid in jar internal and the back flow is in reation kettle, and in the steam of methanol and water got into the methyl alcohol recovery tower for water methanol gas in the tower is clean to have no entrainment thing, and the PH of water methanol becomes 6 from original 3, great reduction pipeline, tower body, reboiler, condenser's corruption, protected equipment, reduction maintenance cost helps reducing manufacturing cost.

Description

Impurity removing device for tower bottom liquid of methanol recovery tower

Technical Field

The utility model belongs to the field of tower bottom liquid pretreatment devices of methanol recovery towers, and particularly relates to a tower bottom liquid impurity removal device of a methanol recovery tower.

Background

The raw oil and methanol are subjected to esterification reaction in a reaction kettle to generate fatty acid methyl ester or ethyl ester, so that the available biodiesel is formed, the tail gas discharged by the reaction kettle contains gas-phase methanol, the tail gas is often carried with the raw oil and sulfuric acid serving as a catalyst to enter a recovery tower, so that the pipeline of the recovery tower is severely corroded, the tower bottom liquid of the methanol recovery tower contains excessive oil, the methanol recovery effect is influenced, the service life of equipment is prolonged, and the production cost is not reduced.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides the impurity removing device for the tower bottom liquid of the methanol recovery tower, and most of raw oil and sulfuric acid are prevented from entering the tower by adding the impurity removing device, so that the problems of pipeline corrosion and oil content in the tower bottom liquid are greatly relieved, the use safety of equipment is effectively protected, the maintenance cost is reduced, and the economic benefit is improved.

The utility model adopts the specific technical scheme that:

the utility model provides a methyl alcohol recovery tower cauldron liquid edulcoration device, establishes ties between the input of methyl alcohol recovery tower and reation kettle's tail gas output, edulcoration device includes the jar body and sets up the edulcoration board in the jar body, the crisscross multiunit that sets up of the slope from bottom to top in the jar body, the lower extreme of the jar body is provided with the air inlet, and the upper end of the jar body is provided with the gas outlet, the air inlet is connected with reation kettle's tail gas output, the gas outlet is connected with methyl alcohol recovery tower's input.

The impurity removing plate is fixed with the side wall of the tank body, the overhanging end of the impurity removing plate extends through the central axis of the tank body, and the air inlet and the air outlet of the tank body are coaxially arranged with the central axis of the tank body.

The lower plate surface of the impurity removal plate is provided with a condensation screen plate, and a plurality of groups of condensation screen plates are arranged in parallel.

The diameter of the air outlet of the tank body is larger than that of the air inlet.

The lower edge of the condensing screen plate is obliquely arranged, and the oblique direction is the same as the oblique direction of the impurity removing plate.

The beneficial effects of the utility model are as follows:

according to the utility model, the impurity removal plate in the tank body is adopted for removing impurities and condensing, the water methanol gas containing acid at the initial stage of the reaction kettle passes through the tank body, oil and sulfuric acid are blocked in the tank body and flow back into the reaction kettle, and methanol and water vapor enter the methanol recovery tower, so that the water methanol gas in the tower is clean and free of entrainment, the PH of the water methanol is changed from original 3 to 6, the corrosion of a pipeline, the tower body, a reboiler and a condenser is greatly reduced, equipment is protected, the maintenance cost is reduced, and the production cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of section A-A of FIG. 1;

FIG. 3 is a schematic view of the impurity removal device after installation;

in the attached drawings, 1, a tank body, 2, a impurity removing plate, 3, an air inlet, 4, an air outlet, 5 and a condensing screen plate.

Detailed Description

The utility model is further described with reference to the accompanying drawings and specific examples:

the utility model discloses a device for removing impurities from tower bottom liquid of a methanol recovery tower, which is shown in fig. 1 and 3, and is connected in series between an input end of the methanol recovery tower and a tail gas output end of a reaction kettle, wherein the device for removing impurities comprises a tank body 1 and impurity removing plates 2 arranged in the tank body 1, the impurity removing plates 2 are obliquely arranged in the tank body 1 from bottom to top in a plurality of groups, an air inlet 3 is arranged at the lower end of the tank body 1, an air outlet 4 is arranged at the upper end of the tank body 1, the air inlet 3 is connected with the tail gas output end of the reaction kettle, and the air outlet 4 is connected with the input end of the methanol recovery tower.

The water methanol tail gas that contains acid of reation kettle enters into jar body 1, stop tail gas through the edulcoration board 2 that sets up in jar body 1, impurity in the tail gas is fogdrop form, contact edulcoration board 2 under inertial action after entering jar body 1, and edulcoration board 2 is the staggered arrangement a plurality of, impurity liquid drops in the tail gas, like raw materials oil drop and sulphuric acid fog drop can fully condense and separate with the methanol gas, the oil content of tower cauldron liquid waste water has been reduced and the COD of tower cauldron liquid waste water has been reduced, alleviate sewage treatment burden, reduce the corruption of equipment such as pipeline, the tower body, reboiler, condenser, extension equipment life, help reducing manufacturing cost.

Further, as shown in fig. 1, the impurity removing plate 2 is fixed to the side wall of the tank body 1, the overhanging end of the impurity removing plate 2 extends through the central axis of the tank body 1, and the air inlet 3 and the air outlet 4 of the tank body 1 are coaxially arranged with the central axis of the tank body 1.

The impurity removing plate 2 stretches through the central axis of the tank body 1, so that tail gas enters the tank body 1 and then is fully turned back, and the impurity removing effect is ensured.

Furthermore, the lower plate surface of the impurity removal plate 2 is provided with a condensation screen plate 5, and a plurality of groups of condensation screen plates 5 are arranged in parallel.

The screen plate 5 that condenses sets up the multiunit to be provided with the mesh on condensing screen plate 5, tail gas after entering into the cavity that the edulcoration board 2 of slope and jar body 1 lateral wall enclose, the back is scattered and is permeated condensing screen plate 5 under inertial action, condensing screen plate 5 has increased the area of contact with impurity droplet, makes impurity droplet more easily glue and covers the condensation, helps improving edulcoration efficiency.

Further, the diameter of the air outlet 4 of the tank body 1 is larger than that of the air inlet 3. The pipe diameter of the air inlet 3 is smaller, the air inlet pressure is higher, the flow velocity of the impurity fog drops in the tail gas after entering the tank body 1 is reduced, condensation and separation are facilitated, the impurity removal effect is improved, the pipe diameter of the air outlet 4 is larger, air resistance is avoided, and smooth air inlet impurity removal is ensured.

As shown in fig. 1, the lower edge of the condensing screen 5 is obliquely arranged in the same direction as the impurity removing plate 2. The liquid drops condensed on the condensation screen plate 5 can fall along the condensation screen plate 5, drop on the impurity removing plate 2 at the lower layer, be favorable for cooling the impurity removing plate 2, flow to the air inlet 3 at the bottom of the tank body 1 layer by layer, drop back into the reaction kettle along the pipe wall through the air inlet 3, reduce the loss of raw oil and sulfuric acid in the reaction kettle, help to shorten the esterification reaction time, and improve the production efficiency.

Claims

1. The tower bottom liquid impurity removing device of the methanol recovery tower is connected in series between the input end of the methanol recovery tower and the tail gas output end of the reaction kettle, and is characterized in that: the impurity removing device comprises a tank body (1) and impurity removing plates (2) arranged in the tank body (1), wherein multiple groups of impurity removing plates (2) are obliquely arranged in the tank body (1) from bottom to top in a staggered mode, an air inlet (3) is formed in the lower end of the tank body (1), an air outlet (4) is formed in the upper end of the tank body (1), the air inlet (3) is connected with the tail gas output end of the reaction kettle, and the air outlet (4) is connected with the input end of the methanol recovery tower.

2. The methanol recovery tower bottoms liquid impurity removal device of claim 1, characterized in that: the impurity removing plate (2) is fixed with the side wall of the tank body (1), the overhanging end of the impurity removing plate (2) stretches through the central axis of the tank body (1), and the air inlet (3) and the air outlet (4) of the tank body (1) are coaxially arranged with the central axis of the tank body (1).

3. The methanol recovery tower bottoms liquid impurity removal device of claim 1, characterized in that: the lower plate surface of the impurity removal plate (2) is provided with a condensation screen plate (5), and a plurality of groups of condensation screen plates (5) are arranged in parallel.

4. The methanol recovery tower bottoms liquid impurity removal device of claim 1, characterized in that: the pipe diameter of the air outlet (4) of the tank body (1) is larger than that of the air inlet (3).

5. A methanol recovery tower bottoms liquid impurity removal device according to claim 3, characterized in that: the lower edge of the condensing screen plate (5) is obliquely arranged, and the oblique direction is the same as the oblique direction of the impurity removing plate (2).