CN209752870U

CN209752870U - Alkylation device

Info

Publication number: CN209752870U
Application number: CN201920287170.0U
Authority: CN
Inventors: 王燕; 邢艳; 张智芳; 张亚
Original assignee: Yulin University
Current assignee: Yulin University
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2019-12-10
Anticipated expiration: 2029-03-07

Abstract

the utility model provides an alkylation unit, including alkylation reactor and result separator, wherein, alkylation reactor includes the reactor barrel, and the surface cover of barrel is equipped with the condensing box, outlet pipe and inlet tube are connected with cooling device respectively, are split into first cavity, second cavity and filler district by first baffle and second baffle from the top down in the barrel, wherein be equipped with a plurality ofly on the first baffle and communicate with first cavity and pass the concentrated sulfuric acid pipe of second baffle, be equipped with a plurality ofly in the second cavity and pass the second baffle and overlap the alkane pipe outside the concentrated sulfuric acid pipe, the lower extreme of concentrated sulfuric acid pipe and alkane pipe is equipped with the alkene pipe, the top of barrel be equipped with the concentrated sulfuric acid inlet pipe of first cavity intercommunication and with the alkane inlet pipe of second cavity intercommunication, result separator includes rectifying column, the second condenser, backward flow jar and reboiler. The utility model has two steps of mixing, which increases the efficiency of mixing; and a cooling device is added and cooperated, so that the cooling efficiency is improved.

Description

alkylation device

Technical Field

The utility model relates to an alkylation equipment field especially indicates an alkylation unit.

background

The sulfuric acid process alkylation is a process of reacting isoparaffin with olefin in the presence of a concentrated sulfuric acid catalyst to generate an alkylation product. Factors affecting the sulfuric acid process alkylation reaction and its complexity, it is generally believed that the controlling step in the perceived sulfuric acid alkylation reaction rate is the mass transfer rate of isobutane to the sulfuric acid phase. Theoretical and practical studies show that: whether the sulfuric acid alkylation can be smoothly carried out depends on whether the acid hydrocarbon dispersion, contact, circulation modes and the like are good or not and whether the reaction heat energy is timely and efficiently removed. Therefore, the sulfuric acid alkylation reaction needs to realize both sufficient mixing of the acid and the hydrocarbon phases and to ensure that the alkylation reaction is carried out under a lower temperature condition.

SUMMERY OF THE UTILITY MODEL

The utility model provides an alkylation unit has solved the double-phase insufficient, the higher problem of reaction temperature of mixing of acid hydrocarbon among the prior art.

The technical scheme of the utility model is realized like this:

An alkylation device comprises an alkylation reactor and a product separation device, wherein the alkylation reactor comprises a reactor barrel, supporting legs are arranged at the bottom of the barrel, a condenser box is sleeved on the outer surface of the barrel, a water outlet pipe is arranged at the top of the left side of the condenser box, a water inlet pipe is arranged at the bottom of the right side of the condenser box, the water outlet pipe and the water inlet pipe are respectively connected with a cooling device, the barrel is divided into a first cavity, a second cavity and a filling area by a first partition plate and a second partition plate from top to bottom, wherein a plurality of concentrated sulfuric acid pipes which are communicated with the first cavity and penetrate through the second partition plate are arranged on the first partition plate, a plurality of alkane pipes which penetrate through the second partition plate and are sleeved outside the concentrated sulfuric acid pipes are arranged in the second cavity, tree-shaped branch structure alkene pipes are arranged at the lower ends of the concentrated sulfuric acid pipes and the alkane pipes, a concentrated sulfuric acid inlet pipe communicated, the product separation device comprises a rectifying tower, a second condenser, a reflux tank and a reboiler, wherein a vertical baffle is arranged in the middle of the rectifying tower, the baffle divides the rectifying tower into a public rectifying section on the upper part, a pre-rectifying section and an extracting section are arranged at the middle part, four parts of a public stripping section on the lower part are arranged, an alkylation reactor is connected with the pre-rectifying section, the rectifying tower is connected with the second condenser and the upper part of the reflux tank through a pipeline, the reflux tank is connected with the public rectifying section and an isobutane tank, the extracting section is connected with the normal butane tank, the bottom of the rectifying tower is circularly connected with the reboiler and the public stripping section, and the other path is connected with an alkylate oil tank.

Preferably, the bottom of supporting leg is equipped with the slipmat, just the bottom of slipmat is equipped with anti-skidding line, can increase the frictional force on supporting leg and ground like this, avoids the barrel skew, has increased stability.

Preferably, cooling device includes evaporimeter, first condenser, back flow and buffer tank, the reflux import intercommunication of buffer tank and evaporimeter, the back flow including be used for with the condenser pipe of the outlet intercommunication of the backward flow of first condenser, connecting pipe, be used for with the buffer tank pipe of buffer tank intercommunication, wherein, the top of connecting pipe is higher than condenser pipe and buffer tank pipe, two pipe ends of connecting pipe communicate with condenser pipe and buffer tank pipe respectively.

Preferably, the branched pipeline of the olefin pipe is provided with small holes with the aperture of 1-10 mm within 360 degrees, and the aperture ratio is 10-50%.

Preferably, the alkane feeding pipe comprises a vertical section and a horizontal section, and the horizontal section is communicated with the second cavity through a connecting pipe.

The utility model has the advantages that:

1. The utility model discloses a concentrated sulfuric acid and alkane send to respective cavity respectively to through a plurality of concentrated sulfuric acid pipe and alkane pipe evenly distributed, then mix with the alkene quick contact of alkene pipe and get into the filler district, under cutting, the dispersion of packing, intensive mixing makes the hydrocarbon mixture and the concentrated sulfuric acid contact of alkane and alkene, thereby obtains the alkylate product. The setting up of cavity can ensure that the horizontal mass transfer ability of concentrated sulfuric acid and alkane is enough big for concentrated sulfuric acid pipe and alkane pipe can obtain sufficient medium, guarantee that the medium distribution is even, just the utility model discloses a reactant takes two steps to mix, has increased the efficiency of mixing.

2. The utility model discloses increased cooling device on the basis of condensing box, cooperate, improve cooling efficiency. Cooling device uses lithium bromide solution as absorbent material, use water as the refrigerant, the refrigerant from first condenser exhaust flows to the baffle-box through the backward flow, then the refrigerant gets into the evaporimeter behind the baffle-box, the refrigerant is cushioned in the baffle-box, effectively reduce the velocity of flow and the impulsive force of the refrigerant that flows to the evaporimeter, lithium bromide lets in the barrel with water again after absorbing heat energy and cools down, thereby the technical problem of the high technical problem who influences the productivity of summer refrigerant temperature that has solved current refrigerant air cooler existence, simultaneously water can reuse, and resources are saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of an alkylation unit according to the present invention;

FIG. 2 is a schematic diagram of the structure of the olefin pipe shown in FIG. 1;

FIG. 3 is an enlarged view of A in FIG. 1;

Fig. 4 is a schematic structural view of the cooling apparatus shown in fig. 1.

The system comprises an alkylation reactor 1, an alkane feeding pipe 11, a concentrated sulfuric acid feeding pipe 12, a connecting pipe 13, a first cavity 14, a first partition plate 15, a first partition plate 16, a second partition plate 17, an olefin pipe 18, a packing area 19, a water inlet pipe 110, an anti-skid pad 111, a supporting leg 112, a condenser tank 113, a second cavity 114, a water outlet pipe 115, a concentrated sulfuric acid pipe 116, an alkane pipe 2, a cooling device 21, a first condenser 22, an evaporator 23, a buffer tank 24, a return pipe 24, a buffer tank pipe 241, a connecting pipe 242, a condenser pipe 243, a rectifying tower 3, a common rectifying section 31, a pre-rectifying section 32, a recovery section 33, a common stripping section 34, a second condenser 4, a return tank 5, an n-butane tank 6, an isobutane tank 7, an isobutane tank 8 oil tank 8 and an alkylation reboiler 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An alkylation device, as shown in fig. 1-4, comprises an alkylation reactor 1 and a product separation device, wherein the alkylation reactor 1 comprises a reactor cylinder, the bottom of the cylinder is provided with support legs 111, the outer surface of the cylinder is sleeved with a condenser 112, the top of the left side of the condenser 112 is provided with a water outlet pipe 114, the bottom of the right side of the condenser 112 is provided with a water inlet pipe 19, the water outlet pipe 114 and the water inlet pipe 19 are respectively connected with a cooling device 2, the cylinder is divided into a first cavity 14, a second cavity 113 and a filler region 18 by a first partition plate 15 and a second partition plate 16 from top to bottom, wherein the first partition plate 15 is provided with a plurality of concentrated sulfuric acid pipes 115 which are communicated with the first cavity 14 and penetrate through the second partition plate 16, the second cavity 113 is provided with a plurality of alkane pipes 116 which penetrate through the second partition plate 16 and are sleeved outside the concentrated sulfuric acid pipes 115, the lower ends of the concentrated sulfuric acid pipes 115 and the alkane pipes 116, the top of barrel is equipped with concentrated sulfuric acid inlet pipe 12 with first cavity 14 intercommunication and the alkane inlet pipe 11 with second cavity 113 intercommunication, and product separator includes rectifying column 3, second condenser 4, reflux drum 5 and reboiler 8, rectifying column 3 middle part is equipped with a vertical baffle, the baffle divides into the public rectifying section 31 on upper portion with rectifying column 3, the prefractionation section 32 and the extraction section 33 of middle part, public stripping section 34 four parts of lower part, alkylation reaction ware 1 with prefractionation section 32 links to each other, and rectifying column 3 passes through the pipeline and links to each other with second condenser 4, reflux drum 5 upper portion, and reflux drum 5 is connected with public rectifying section 31 and isobutane jar 6, and extraction section 33 is connected with normal butane jar 7, and rectifying column 3's bottom is all the way and reboiler 8, public stripping section 34 is cyclic connection, and another way is connected with alkylation oil tank 9.

On the basis of the technical scheme, the bottom of the supporting leg 111 is provided with the anti-slip pad 110, and the bottom of the anti-slip pad 110 is provided with the anti-slip lines, so that the friction force between the supporting leg 111 and the ground can be increased, the deviation of the cylinder body is avoided, and the stability is improved.

On the basis of the above technical solution, the cooling device 2 includes an evaporator 22, a first condenser 21, a return pipe 24 and a buffer tank 23, the buffer tank 23 is communicated with a return inlet of the evaporator 22, the return pipe 24 includes a condenser pipe 243 for communicating with a return outlet of the first condenser 21, a connecting pipe 242 and a buffer tank pipe 241 for communicating with the buffer tank 23, wherein a top end of the connecting pipe 242 is higher than the condenser pipe 243 and the buffer tank pipe 241, and two pipe ends of the connecting pipe 242 are respectively communicated with the condenser pipe 243 and the buffer tank pipe 241.

On the basis of the technical scheme, small holes with the aperture of 1-10 mm are arranged in the branch pipeline of the olefin pipe 17 within 360 degrees, the aperture ratio is 10% -50%, and the contact area of reactants is increased.

On the basis of the technical scheme, the alkane feeding pipe 11 comprises a vertical section and a horizontal section, and the horizontal section is communicated with the second cavity 113 through a connecting pipe 13.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An alkylation device, which is characterized by comprising an alkylation reactor and a product separation device, wherein the alkylation reactor comprises a reactor barrel, the bottom of the barrel is provided with support legs, the outer surface of the barrel is sleeved with a condenser box, the top of the left side of the condenser box is provided with a water outlet pipe, the bottom of the right side of the condenser box is provided with a water inlet pipe, the water outlet pipe and the water inlet pipe are respectively connected with a cooling device, the barrel is divided into a first cavity, a second cavity and a filling area by a first partition plate and a second partition plate from top to bottom, wherein the first partition plate is provided with a plurality of concentrated sulfuric acid pipes which are communicated with the first cavity and penetrate through the second partition plate, the second cavity is internally provided with a plurality of alkane pipes which penetrate through the second partition plate and are sleeved outside the concentrated sulfuric acid pipes, the lower ends of the concentrated sulfuric acid pipes and the alkane pipes are provided with tree-shaped branch structure olefin pipes, the top end of the, the product separation device comprises a rectifying tower, a second condenser, a reflux tank and a reboiler, wherein a vertical baffle is arranged in the middle of the rectifying tower, the baffle divides the rectifying tower into a public rectifying section on the upper part, a pre-rectifying section and an extracting section are arranged at the middle part, four parts of a public stripping section on the lower part are arranged, an alkylation reactor is connected with the pre-rectifying section, the rectifying tower is connected with the second condenser and the upper part of the reflux tank through a pipeline, the reflux tank is connected with the public rectifying section and an isobutane tank, the extracting section is connected with the normal butane tank, the bottom of the rectifying tower is circularly connected with the reboiler and the public stripping section, and the other path is connected with an alkylate oil tank.

2. The alkylation apparatus of claim 1, wherein the support legs are provided with a skid pad at the bottom thereof, and the skid pad is provided with skid-resistant lines at the bottom thereof.

3. The alkylation apparatus of claim 1, wherein the cooling device comprises an evaporator, a first condenser, a return line, and a buffer tank, the buffer tank being in communication with a return inlet of the evaporator, the return line comprising a condenser pipe for communicating with a return outlet of the first condenser, a connecting pipe, and a buffer tank pipe for communicating with the buffer tank, wherein the connecting pipe has a top end higher than the condenser pipe and the buffer tank pipe, and both pipe ends of the connecting pipe are in communication with the condenser pipe and the buffer tank pipe, respectively.

4. The alkylation apparatus of claim 1, wherein the branched conduit of the olefin pipe has small holes with a diameter of 1-10 mm arranged within 360 ° and an aperture ratio of 10-50%.

5. The alkylation apparatus of claim 1, wherein the alkane feed conduit comprises a vertical section and a horizontal section, the horizontal section being in communication with the second cavity via a connecting conduit.