CN1406654A

CN1406654A - Liquid distributor

Info

Publication number: CN1406654A
Application number: CN 01128556
Authority: CN
Inventors: 秦总根; 仪志宏; 胡先君; 李冰
Original assignee: Sinopec Baling Co
Current assignee: Sinopec Baling Co
Priority date: 2001-08-23
Filing date: 2001-08-23
Publication date: 2003-04-02

Abstract

A liquid distributor is composed of upper layer and lower layer and features that the branch tubes of upper and lower layers are respectively connected to the horizontal trunks of upper and lower layers. Its can improve the operation elasticity of rectifying tower, uniformly distribute the sprayed liquid and and gas, and decrease the content of hydrogen peroxide on the tower top to less than 0.03%.

Description

A kind of liquid distributor

Technical field

The present invention relates to a kind of liquid distributor, the liquid distribution trough in particularly a kind of hydrogen peroxide liquid rectifying column.

Background technology

The hydrogen peroxide obtained by anthraquinone process production technology comprise hydrogenation, oxidation and the hydrogen peroxide of working solution extraction, purification, several operations such as concentrate.27.5% hydrogen peroxide that cleaning procedure obtains is after rectifying concentrates, and the concentration requirement of its hydrogen peroxide is more than 50%, and the content of hydrogen peroxide of rectifying column cat head must not surpass 0.03%.After filler in the rectifying column was selected, these two indexs depended on whether liquid distribution trough initially sprays liquid distribution even.

Hydrogen peroxide concentrates and to utilize its saturated vapor pressure ratio water low and carry out.Low concentration hydrogen peroxide steam enters from the tower bottom, and pure water adds from tower top, and vapour, liquid two-phase are carried out mass transfer in filler, and the water of evaporation etc. comes out to enter subsequent handling from cat head, and is that the product that will produce comes out at the bottom of tower by the hydrogen peroxide of water condensation.

The single tubular type liquid distribution trough of the general employing of liquid distribution trough in the domestic hydrogen peroxide obtained by anthraquinone process rectifying column, each seven distribution arms that evenly distribute of the both sides that distributor is responsible for, two row's spray apertures are opened in every arm bottom, and the aperture is 2.5mm, spray angle is 30 °, and the spray hole count is generally 148.There are three significant disadvantages in this liquid distribution trough: the one, and operating flexibility is little, it only is 2.3: 1, like this, the maximum of energy ordinary production, minimum production load change little, system can't produce load producing below 70% for normal duty, system produces and fluctuation occurs, and production can not normally be carried out; The 2nd, the spray apertures aperture uniformity of distributor, and in the import department of spray liquid with away from import department, the pressure that spray liquid is subjected to is also inconsistent, the flow velocity of liquid is also different, nearly import department flow velocity is big, import department far away flow velocity is little, like this, the distribution of the spray liquid in the uniform liquid distribution trough in aperture is just inhomogeneous, can cause that undoubtedly spray liquid sprays the skewness on the filler, cause vapour, liquid mass transfer to worsen, entrainment take place when serious, at the bottom of the cat head tower in the discharging content of hydrogen peroxide all exceed standard; The 3rd, the spray of distributor is counted very few, do not reach the desired sprinkle density of filler, spray is counted few, spray liquid is difficult to fully wetting whole filling surface when causing spray, certainly will cause the generation of a large amount of wall streams, channeling, have a strong impact on vapour, liquid mass transfer, content of hydrogen peroxide all can't be up to standard in the discharging at the bottom of the cat head tower, causes the waste and the loss of hydrogen peroxide.

Technology contents

The purpose of this invention is to provide a kind of liquid distributor.

The objective of the invention is to realize in the following way: liquid distribution trough is made of two-layer up and down, and two layer arms link to each other with two-layer horizontal house steward is corresponding up and down respectively up and down.The spray apertures aperture is divided into some groups and carries out the cloth hole, and the pore size in every group differs, and aperture, hole minimum is faced in the spray of spray liquid import department, and the spray apertures aperture makes a flow constitute normal distribution as much as possible along with increasing gradually from the increase of charging aperture distance.Spray angle is 30～45 °, and sprinkle density is 100 point/rice ², operating condition is kept existing constant, and promptly operating pressure is 6～9KPa, and operating temperature is 35 ℃～70 ℃.

Adopt the present invention can improve the operating flexibility of rectifying column, the production load is reduced to and was produced in 50% o'clock and can both normally carry out; Simultaneously, the spray liquid that can evenly distribute, vapour, liquid mass transfer can fully effectively carry out, and avoid the generation of a large amount of wall streams, channel and entrainment phenomenon, guarantee the cat head content of hydrogen peroxide below 0.03%, and concentration of hydrogen peroxide surpasses 50% at the bottom of the tower.Adopt the present invention, the operating flexibility of rectifying column has reached 9.8: 1.Under the identical operations condition, concentration of hydrogen peroxide is more than 50% at the bottom of the tower, content of hydrogen peroxide is less than 0.03% at the bottom of the tower, it is annual that therefore can increase production dense product hydrogen peroxide reaches 60 tons, can bring every year direct economic benefit to reach more than 30 ten thousand yuan, and the investment of this distributor only is more than 2,000 yuan, and benefit is very obvious.

Description of drawings

The present invention is further illustrated below in conjunction with accompanying drawing:

Fig. 1 is liquid distribution trough facade of the present invention and plane structural representation;

Fig. 2 is a liquid distribution trough spray apertures cloth of the present invention hole schematic diagram;

Fig. 3, Fig. 4, Fig. 5 dash area are liquid distribution trough spray apertures grouping cloth of the present invention hole schematic diagrames.

1 is liquid distribution trough, the 2nd among the figure, liquid distribution trough spray apertures, the 3rd, liquid distribution trough arm

Embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the pore size of whole liquid distributor spray apertures is divided into array, for ease of making, below 1m, should be divided into two groups to tower diameter, the spray apertures aperture is 0.9～1.3mm; Tower diameter is at should be divided into three groups of 1～3m, and the spray apertures aperture is 1.0～1.6mm; Tower diameter is at should be divided into four groups of 3～6m, and the spray apertures aperture is 1.5～2.5mm; Tower diameter is at should be divided into five groups of 6～10m, and the spray apertures aperture is 1.8～3.5mm; Tower diameter is at should be divided into six groups of 10～15m, and the spray apertures aperture is 2.0～5.5mm; Tower diameter should be divided into seven groups more than 15m, the spray apertures aperture is 2.5～8.5mm; Spray angle is 30～45 °, spray apertures aperture unanimity in the group, and from closely increasing gradually to aperture far away, the empty footpath of spray apertures is 1.1mm among Fig. 3 apart from the spray liquid charging aperture, and the empty footpath of spray apertures is 1.3mm among Fig. 4, and the empty footpath of spray apertures is 1.4mm among Fig. 5.

Example:

One diameter is the rectifying column of 1800mm, from the spray liquid charging aperture from inside to outside, apart from charging aperture is that 1/3rd tower diameters are 1.1mm with interior spray apertures aperture, apart from charging aperture is that 2/3rds tower diameters are 1.3mm with interior spray apertures aperture, is that 1/3rd tower diameters spray apertures aperture in addition is 1.4mm apart from charging aperture.Spray angle is 35 °, and three row's spray apertures are opened in every arm bottom, a tube pitch 260mm, and spray apertures is at arm axial spacing 90mm, and the spray hole count is 282.

Claims

1, a kind of liquid distributor is characterized in that: liquid distribution trough is made of two-layer up and down, and two layer arms link to each other with two-layer horizontal house steward is corresponding up and down respectively up and down.

2, a kind of liquid distributor according to claim 1, it is characterized in that: the spray apertures aperture is divided into some groups and carries out the cloth hole, pore size in every group differs, and aperture, hole minimum is faced in the spray of spray liquid import department, and the spray apertures aperture is along with increasing gradually from the increase of charging aperture distance.

3, a kind of liquid distributor according to claim 1 is characterized in that: spray angle is 30 °～45 °, and sprinkle density is 100 point/rice ²