CN208814913U - Isooctane device selective hydrogenation optimization system - Google Patents

Abstract

The utility model relates to a kind of isooctane device selective hydrogenation optimization systems, including the first hydrogenator, second hydrogenator and cooler, the import of first hydrogenator connects feeding pipe, the outlet of first hydrogenator connects the import of the second hydrogenator through cooler, the outlet connection discharging pipeline of second hydrogenator, cooler it is upper, first bypass in parallel with the cooler is equipped between downstream pipe, first bypass is equipped with the first bypass valve, first hydrogenator it is upper, second bypass in parallel with first hydrogenator is equipped between downstream pipe, second bypass is equipped with the second bypass valve.It is more flexible that the optimization system can not only make the temperature of charge of the entrance of the second hydrogenator control, the temperature adjustment being adapted under various working, and regenerated after capable of individually cutting out first hydrogenator, it ensure that whole device is not stopped work because of catalyst member inactivation.

Description

Isooctane device selective hydrogenation optimization system

Technical field

The utility model relates to chemical plant installations technical field more particularly to a kind of isooctane device selective hydrogenation are excellent Change system.

Background technique

In existing isooctane process unit, dividing C4 to carry out selective hydrogenation in gas is a highly important process.Its Middle gas is divided to the selective hydrogenation of C4 pretreatment unit to be generally divided into two sections, i.e. one-stage hydrogenation reactor is reacted with secondary hydrogenation Device, two hydrogenators are arranged in series, wherein the intermediate material come out from one-stage hydrogenation reactor is needed through cooler It after cooling, is re-fed into second-stage hydrogenation reactor and continues hydrogenation reaction, wherein the temperature adjusting to intermediate material is to pass through The return water regulating valve control of recirculated water in cooler.

In the actual production process, with the continuous service of production, the catalyst in one-stage hydrogenation reactor can be gradually old Change, reaction load reduces, and correspondingly, the reaction load in second-stage hydrogenation reactor increases, needed for second-stage hydrogenation reactor Feeding temperature increase, it is therefore desirable to reduce the internal circulating load of recirculated water in cooler, and then come out to from one-stage hydrogenation reactor The temperature of intermediate material be adjusted, but this mode cannot meet the temperature need in second-stage hydrogenation reactor well It asks, control is not flexible, also, as the internal circulating load of recirculated water reduces, flow velocity is easy fouling more slowly and forms corruption under dirt in cooler Erosion, it is more serious to the damage of cooler.

Further, since one-stage hydrogenation reactor is to be arranged in series, thus work as one-stage hydrogenation and react with second-stage hydrogenation reactor After catalyst in device will appear aging inactivation, existing apparatus can not guarantee under its normal operation, by one-stage hydrogenation Reactor cuts out regeneration, can only shutdown process, this has seriously affected production efficiency.

Therefore existing isooctane device selective hydrogenation device also requires further improvement.

Utility model content

For the current state of the art, the technical problem to be solved by the utility model is to provide a kind of control spirits of temperature It is living, facilitate one of hydrogenator to cut out regenerated isooctane device selective hydrogenation optimization system.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of isooctane device selective hydrogenation Optimization system, including the first hydrogenator, the second hydrogenator and cooler are reacted, first hydrogenator Import connects feeding pipe, the outlet of first hydrogenator through cooler connect second hydrogenator into Mouthful, the outlet of second hydrogenator connects discharging pipeline, is equipped between the upstream and downstream pipeline of the cooler cold with this But device the first bypass in parallel, first bypass are equipped with the first bypass valve, the upper and lower play pipe of first hydrogenator Second bypass in parallel with first hydrogenator is equipped between road, second bypass is equipped with the second bypass valve.

As an improvement, the outlet of first hydrogenator by the material of cooler described in the first piping connection into Mouthful, import of the material outlet of the cooler by the second hydrogenator described in the second piping connection, first bypass It is connected between the first pipeline and the second pipeline.

As an improvement, second bypass is connected between the feeding pipe and second pipeline.

As an improvement, the upstream of first hydrogenator is equipped with the first mixer and control enters the first mixer First valve of middle mass flow, the upstream of second hydrogenator is equipped with the second mixer and control enters second and mixes Second valve of mass flow in clutch.By the first mixer and the second mixer can introduce hydrogen and with wherein C4 object Material is sufficiently mixed, and is then input in corresponding hydrogenator together and is carried out hydrogenation reaction.

As an improvement, the cooler is water recirculator, the tube side of water recirculator walks recirculated water, recirculated water cooling But the shell side of device walks reaction mass；The material import and export position of the water recirculator is connected separately with third valve, the 4th The recirculated water import and export position of valve, the water recirculator is connected separately with the 5th valve, the 6th valve.

As an improvement, the import and export position of first hydrogenator is connected separately with the 7th valve, the 8th valve, The import and export position of second hydrogenator is connected separately with the 9th valve, the tenth valve.

Compared with prior art, the advantages of the utility model: the isooctane device selective hydrogenation in the utility model is anti- Answer optimization system that there is first bypass and first bypass valve in parallel with cooler, bypass adjusting enables to second to add hydrogen anti- It answers the temperature of charge of the entrance of device to control more flexible, is adapted to temperature under various working and adjusts, and in cooler Recirculated water can keep biggish internal circulating load, reduce underdeposit corrosion, reduce disclosure risk；In addition, isooctane device selectively adds Hydrogen reaction optimization system also has second bypass and second bypass valve in parallel with the first hydrogenator, when the first hydrogenation reaction After catalyst in device will appear aging inactivation, first hydrogenator can individually be cut out by second bypass laggard Row regeneration ensure that whole device is not stopped work because of catalyst member inactivation.

Detailed description of the invention

Fig. 1 is the schematic diagram of isooctane device selective hydrogenation optimization system in the utility model.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

Referring to Fig. 1, isooctane device selective hydrogenation optimization system, including the first hydrogenator 1, second plus hydrogen Reactor 2 and cooler 3, the import of the first hydrogenator 1 connect feeding pipe 4, the outlet warp of the first hydrogenator 1 Cooler 3 connects the import of the second hydrogenator 2, and the outlet of the second hydrogenator 2 connects discharging pipeline 4, cooler 3 First bypass 5 in parallel with the cooler 3 is equipped between the pipeline of upstream and downstream, the first bypass 5 is equipped with the first bypass valve 51, tool Body, the outlet of the first hydrogenator 1 connects the material inlet of cooler 3 by the first pipeline 8, and the material of cooler 3 goes out Mouth connects the import of the second hydrogenator 2 by the second pipeline 9, and the first bypass 5 is connected to the first pipeline 8 and the second pipeline 9 Between.Second bypass 7 in parallel with first hydrogenator 1 is equipped between the upstream and downstream pipeline of first hydrogenator 1, Second bypass 7 is equipped with the second bypass valve 71, and in the present embodiment, the second bypass 7 is connected to feeding pipe 4 and the second pipeline 9 Between, certainly, the second bypass 7 is connected between feeding pipe 4 and the first pipeline 8, also can be easily by the first hydrogenator 1 It cuts out and then is regenerated.

The first bypass 5 and the first bypass valve in isooctane device selective hydrogenation optimization system in the present embodiment 51 enable to the temperature of charge control of the entrance of the second hydrogenator 2 more flexible, are adapted under various working warm Degree adjustment, especially phase after manufacture meet the temperature of charge requirement of the entrance of the second hydrogenator 2, and cooling Recirculated water in device 3 can keep biggish internal circulating load, reduce fouling, reduce disclosure risk；On the other hand, isooctane device selects The second bypass 7 and the second bypass valve 71, the catalysis in the first hydrogenator 1 are provided in selecting property hydrogenation reaction optimization system After agent will appear aging inactivation, regenerated after can individually being cut out first hydrogenator 1 by second bypass 7, It ensure that whole device is not stopped work because of catalyst member inactivation.

In the present embodiment, the upstream of the first hydrogenator 1 is equipped with the first mixer 10 and control enters first and mixes First valve 11 of mass flow in clutch 10, the upstream of the second hydrogenator 2 is equipped with the second mixer 12 and control enters Second valve 13 of mass flow into the second mixer 12.It can be introduced by the first mixer 10 and the second mixer 12 Hydrogen is simultaneously sufficiently mixed with C4 material therein, is then input in corresponding hydrogenator together and is carried out adding hydrogen anti- It answers, it is contemplated that the import for connecting hydrogen pipeline is all had on the first mixer 10 and the second mixer 12.

In the present embodiment, cooler 3 is water recirculator 3, and specifically, the tube side of water recirculator 3 walks circulation The shell side of water, water recirculator 3 walks reaction mass, it is of course also possible to be that the tube side of water recirculator 3 walks reaction mass, The shell side of water recirculator 3 walks recirculated water.The material import and export position of water recirculator 3 is connected separately with third valve 14, the recirculated water import and export position of the 4th valve 15, water recirculator 3 is connected separately with the 5th valve 16, the 6th valve 17.Similarly, the import and export position of the first hydrogenator 1 is connected separately with the 7th valve 18, the 8th valve 19, and second adds The import and export position of hydrogen reactor 2 is connected separately with the 9th valve 20, the tenth valve 21.

The temperature controlled processes and catalyst regeneration process of isooctane device selective hydrogenation optimization system are as follows: when There is aging in catalyst in first hydrogenator 1, when reaction load reduces, can open in parallel with cooler 3 the One bypass valve 51, at this time through the first hydrogenator 1 flow out pyroreaction material be divided into two strands, wherein one reaction mass after Afterflow is flowed out after cooler 3 carries out cooling, and another strand of reaction mass directly passes through the first bypass 5 outflow, and two materials converge Enter the second hydrogenator 2 afterwards, by adjusting the aperture of the first bypass valve 51, temperature after two bursts of reaction mass mixing can be made The temperature requirement that degree preferably meets the second hydrogenator 2 can increase the recirculated water import and export of cooler 3 at the same time The aperture of the 5th valve, the 6th valve at position, increases the internal circulating load of recirculated water, avoids 3 fouling of cooler from being formed rotten under dirt Erosion, extends the service life of cooler 3.It, can be with when the further aging of catalyst in the first hydrogenator 1 inactivates The second bypass valve 71 in the second bypass 7 is opened, so that reaction mass all passes through the second bypass 7 and enters the second hydrogenator The reaction was continued in 2, without making shutdown process, influences the normal operation of production, meanwhile, the first hydrogenator 1 can be cut out After carry out catalyst regeneration, after the completion of the catalyst regeneration in the first hydrogenator 1, turn off in the second bypass 7 Two bypass valves 71, are reacted so that reaction mass reenters in first reactor, this isooctane device selective hydrogenation Reaction temperature control process and catalyst regeneration process can enable entire isooctane device long-term operation, reduce and stop work Number improves production efficiency.

Claims (6)

1. a kind of isooctane device selective hydrogenation optimization system, including the first hydrogenator (1), the second hydrogenation reaction Device (2) and cooler (3), it is characterised in that: the import of first hydrogenator (1) connects feeding pipe (4), described The outlet of first hydrogenator (1) connects the import of second hydrogenator (2) through cooler (3), and described second adds Outlet connection discharging pipeline (5) of hydrogen reactor (2), is equipped between the upstream and downstream pipeline of the cooler (3) and the cooler (3) the first bypass (6) in parallel, first bypass (6) are equipped with the first bypass valve (61), first hydrogenator (1) second bypass (7) in parallel with the first hydrogenator (1), second bypass are equipped between upstream and downstream pipeline (7) the second bypass valve (71) are equipped with.

2. isooctane device selective hydrogenation optimization system according to claim 1, it is characterised in that: described first The outlet of hydrogenator (1) connects the material inlet of the cooler (3) by the first pipeline (8), the cooler (3) Material outlet connects the import of second hydrogenator (2) by the second pipeline (9), and first bypass (6) is connected to Between first pipeline (8) and the second pipeline (9).

3. isooctane device selective hydrogenation optimization system according to claim 2, it is characterised in that: described second Bypass (7) is connected between the feeding pipe (4) and second pipeline (9).

4. described in any item isooctane device selective hydrogenation optimization systems, feature exist according to claim 1~3 In: the upstream of first hydrogenator (1) is equipped with the first mixer (10) and control enters in the first mixer (10) The first valve (11) of mass flow, the upstream of second hydrogenator (2) be equipped with the second mixer (12) and control into Enter the second valve (13) of the mass flow in the second mixer (12).

5. described in any item isooctane device selective hydrogenation optimization systems, feature exist according to claim 1~3 In: the cooler (3) is water recirculator, and the tube side of water recirculator walks recirculated water, the shell side of water recirculator Walk reaction mass；

The material import and export position of the water recirculator is connected separately with third valve (14), the 4th valve (15), described The recirculated water import and export position of water recirculator is connected separately with the 5th valve (16), the 6th valve (17).

6. described in any item isooctane device selective hydrogenation optimization systems, feature exist according to claim 1~3 In: the import and export position of first hydrogenator (1) is connected separately with the 7th valve (18), the 8th valve (19), described The import and export position of second hydrogenator (2) is connected separately with the 9th valve (20), the tenth valve (21).