CN215162409U - Device for producing 5# industrial white oil in wax oil hydrocracking process - Google Patents
Device for producing 5# industrial white oil in wax oil hydrocracking process Download PDFInfo
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- CN215162409U CN215162409U CN202121521373.5U CN202121521373U CN215162409U CN 215162409 U CN215162409 U CN 215162409U CN 202121521373 U CN202121521373 U CN 202121521373U CN 215162409 U CN215162409 U CN 215162409U
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Abstract
The utility model provides a device of 5# industry white oil is produced to wax oil hydrocracking in-process, the device includes vapour and liquid separator, diesel oil strip tower and gas heater, the diesel oil fraction export of the main fractionating tower of entry linkage of vapour and liquid separator, vapour and liquid separator's liquid phase export links to each other with the upper portion entry of diesel oil strip tower, two parallelly connected pipelines of entry linkage of gas heater, one is gas stripping gas feed line, and another links to each other with the lower part export of diesel oil strip tower, the export of gas heater links to each other with the lower part entry of diesel oil strip tower. The utility model improves the diesel stripping tower in the wax oil hydrocracking device, adopts hot gas to strip the diesel fraction, so that light components in the diesel fraction are taken out, and the initial boiling point of the diesel fraction is improved, thereby meeting the standard requirement of 5# industrial white oil; the device has simple flow, can realize the on-line switching of producing diesel oil and 5# industrial white oil, does not need to shut down, and has strong flexibility.
Description
Technical Field
The utility model belongs to the technical field of petroleum processing, a device of 5# industry white oil is produced to wax oil hydrocracking in-process is related to.
Background
Along with the adjustment of international and domestic economic structures and the slowing of economic acceleration, the increase speed of diesel consumption is slow, and the problem to be solved by refineries is to increase enterprise benefits and reduce diesel yield. The diesel oil, the industrial white oil and the aviation kerosene are used as main products of a wax oil hydrocracking device, the yield of the diesel oil is reduced through the adjustment and improvement of the device, the yield of products such as the industrial white oil and the aviation kerosene is increased, the added value of the products can be effectively improved, and the method has important significance for improving the economic benefit of the hydrocracking device.
In the prior art, after a reaction product of a wax oil hydrocracking device is cut by a device fractionation system, a diesel fraction enters a side stripper for further separation, the fractionated diesel product has a low opening flash point and low viscosity, and contains kerosene odor, which cannot meet the industrial standard of industrial white oil, and the diesel product is mainly related to the initial boiling point of diesel, and the initial boiling point is low, so that the overlap of aviation kerosene fraction and diesel fraction is more, the structure of the diesel stripper needs to be improved, the aviation kerosene fraction is prevented from being cut into the diesel fraction, and a No. 5 industrial white oil product can be produced.
CN 109504436A discloses a method for hydrocracking aviation kerosene with high yield, which comprises the following steps: the method comprises the following steps that (1) raw oil S1 and hydrogen are subjected to hydrofining through a first reactor and then sequentially enter a high-pressure separator and a low-pressure separator, and naphtha and aviation kerosene fractions are cut from liquid-phase material flow of the low-pressure separator through a fractionating tower; and the gas phase material flow of the S2 high-pressure separator passes through a recycle hydrogen compressor and then is mixed with the bottom material of the fractionating tower to enter a second reactor for hydrocracking reaction, and then the reaction effluent returns to the first reactor. The method arranges a fractionating tower between a first reactor and a second reactor, produces aviation kerosene with low aromatic hydrocarbon content and high smoke point under medium pressure, but does not relate to the operation of producing industrial white oil from diesel oil fraction, nor relates to the use of a diesel oil stripping tower.
CN 112410068A discloses a wax oil hydrocracking unit and a method for producing 5# industrial white oil by the same, wherein the method comprises the following steps: mixing catalytic diesel oil and coking diesel oil with light wax oil under normal and reduced pressure to obtain mixed raw material; sequentially entering a hydrofining reactor and a hydrocracking reactor; carrying out gas-liquid separation on the cracking reaction product in a cold and hot high-low separator; the oil generated by the reaction enters a hydrogen sulfide stripping tower and then enters a flash tank; heating oil generated by reaction at the bottom of the flash tank, cutting the oil in a fractionating tower to obtain naphtha, aviation kerosene, industrial white oil and tail oil respectively; the method mainly introduces a complete process of wax oil hydrocracking, wherein diesel oil separated by a fractionating tower passes through a diesel oil stripping tower and is stripped by adopting steam, and tower bottom fraction needs to be coalesced and dehydrated by a coalescer and a drying tank to obtain industrial white oil.
In summary, for how to increase the yield of the 5# industrial white oil in the wax oil hydrocracking process, the stripping tower in the fractionation system needs to be improved to increase the initial boiling point of the diesel oil fraction, so that the light components in the diesel oil fraction can be fully separated, thereby obtaining the 5# industrial white oil and increasing the added value of the product.
SUMMERY OF THE UTILITY MODEL
Problem to prior art exists, the utility model aims to provide a device of production 5# industry white oil in the wax oil hydrocracking in-process, the device improves through the diesel oil strip tower with among the wax oil hydrocracking device among the fractionating system, especially improves the reboiler at the bottom of the tower for the air stripping gas heater, adopts the hot gas to carry out the air stripping to the diesel oil fraction for light components such as aviation kerosene in the diesel oil fraction are taken away, improve the initial boiling point of diesel oil fraction, thereby satisfy the standard requirement of 5# industry white oil, have increased the output of high added value 5# industry white oil.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a device of production 5# industry white oil among wax oil hydrocracking process, the device includes vapour and liquid separator, diesel oil strip tower and gas heater, the diesel oil fraction export of vapour and liquid separator's entry linkage main fractionating tower, vapour and liquid separator's liquid phase export links to each other with the upper portion entry of diesel oil strip tower, two parallelly connected pipelines of entry linkage of gas heater, one is gas stripping gas feed line, and another links to each other with the lower part export of diesel oil strip tower, the export of gas heater links to each other with the lower part entry of diesel oil strip tower, the bottom export output 5# industry white oil of diesel oil strip tower.
The utility model discloses in, the hydrocracking unit of wax oil is one of the important sources of diesel oil production, and based on reducing diesel oil output at present, and improve the requirement of 5# industry white oil and aviation kerosene output, according to the composition difference between different products, the utility model discloses improve the diesel oil stripper structure behind the main fractionating tower among the hydrocracking unit, the diesel oil fraction that the main fractionating tower fractionated earlier through gas-liquid separation, liquid phase component gets into the diesel oil stripper, under the effect of the gas stripping gas after the heating, the aviation kerosene and lighter components of sneaking into in the diesel oil fraction are separated away, improve the initial fraction point of diesel oil fraction for the remaining product satisfies the standard requirement of 5# industry white oil, improves the added value and the economic benefits of product, realizes reducing the gasoline and diesel oil output of refinery, reduces the purpose of the diesel-gasoline ratio of refinery simultaneously;
the heating of the stripping gas is realized by a gas heater improved by an original reboiler, and the stripping gas adopts non-steam gas, so that more water is prevented from being introduced into the industrial white oil, dehydration equipment is not required to be added, the modification is simple, and the cost is low; moreover, the device has simple flow, can realize the on-line switching of producing diesel oil and 5# industrial white oil, does not need to be shut down, does not influence normal production, and has strong flexibility.
Following conduct the utility model discloses preferred technical scheme, nevertheless do not conduct the utility model provides a technical scheme's restriction, through following technical scheme, can reach and realize better the utility model discloses a technical purpose and beneficial effect.
As a preferred technical scheme of the utility model, the gas phase outlet of the gas-liquid separator is connected to the main fractionating tower.
As the utility model discloses preferred technical scheme, be equipped with first booster pump, first fluidflowmeter and first governing valve on the connecting pipeline of vapour and liquid separator and diesel oil strip tower in proper order.
In the utility model, the gas-liquid separator is used for the preliminary separation of the diesel oil fraction, and part of light components with low boiling points are separated out in the gas-liquid separator, thereby avoiding the influence of gas phase generated in the conveying process on transportation and metering; the liquid phase components of the gas-liquid separator are conveyed by a pump and subjected to flow detection and regulation to control the material quantity and the material state entering the diesel stripping tower, wherein a liquid level meter can be further arranged on the gas-liquid separator to control the input and output quantity of the gas-liquid separator.
As the preferred technical scheme of the utility model, the diesel oil strip tower is the tray column, the column plate number in the tray column is 6 ~ 10, for example 6, 7, 8, 9 or 10.
As the preferred technical scheme of the utility model, the top outlet of the diesel oil stripping tower is connected to the main fractionating tower.
The utility model discloses in, adopt the hot gas to carry out the air stripping to the diesel oil fraction, separate out the light component in the diesel oil fraction, return main fractionating tower jointly with the air stripping gas, and because used gas stripping gas is steam, its boiling point is extremely low, is difficult to carry out the condensation liquefaction, therefore the top of the tower gas of main fractionating tower can only carry out partial condensation, and noncondensable gas additionally discharges or cyclic utilization.
As the utility model discloses preferred technical scheme, be equipped with the distributor in the diesel oil strip tower, the distributor is located the entrance that gas heater is connected to the diesel oil strip tower.
As the utility model discloses preferred technical scheme, all be equipped with the valve or the junction of two parallelly connected pipelines is equipped with the diverter valve on two parallelly connected pipelines of gas heater's entry linkage.
The utility model discloses in, gas heater carries out the improvement on former diesel oil strip tower reboiler basis, has increased a gas stripping gas feed line, does not influence original tower inner distillate circulation pipeline, and two pipelines can switch according to the switching of valve to can adjust the output of 5# industry white oil and diesel oil product as required.
As the preferred technical scheme of the utility model, the gas stripping gas includes nitrogen gas or gaseous light hydrocarbon, gaseous light hydrocarbon includes any one of methane, ethane, propane or butane.
As the preferred technical scheme of the utility model, the gas heater is still connected with the heat source pipeline, the heat source includes the tail oil that produces in the wax oil hydrocracking process.
The utility model discloses in, the gas stripping gas adopts non-steam gas, can avoid the water content too high in the industry white oil, need not newly-increased equipment simultaneously, and the device changes fewly, and gas stripping gas heating rear temperature can reach 160 ~ 200 ℃, avoids the temperature to hang down excessively and can't take out the light component, causes the gas stripping effect not good, can't satisfy the standard requirement of industry white oil.
The amount of the stripping gas is one of important factors influencing the stripping effect of the diesel oil fraction, the initial boiling point of the industrial white oil product can be influenced by the amount of the stripping gas, so that the open flash point of the industrial white oil product is influenced.
As the utility model discloses preferred technical scheme, be equipped with second booster pump and second liquid flowmeter in proper order on the connecting pipeline of the bottom export of diesel oil strip tower.
The utility model discloses in, the bottom outlet fraction of diesel oil strip tower is through the transport of pump, and its flow can be adjusted according to the liquid level height in the diesel oil strip tower, and the lower part of diesel oil strip tower can set up the level gauge promptly, and the bottom outlet fraction uses as 5# industry white oil product after the heat transfer cooling.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the device of the utility model improves the diesel stripping tower in the fractionation system of the wax oil hydrocracking device, especially improves the tower bottom reboiler into a gas stripping gas heater, adopts hot gas to carry out gas stripping on diesel fraction, so that light components such as aviation kerosene in the diesel fraction are taken out, the initial boiling point of the diesel fraction is improved, the standard requirement of 5# industrial white oil is met, the 5# industrial white oil has high additional value, the yield can be increased by more than 60t/h, and the economic benefit is improved;
(2) the gas stripping gas of the utility model adopts non-steam gas, avoids introducing more moisture into the industrial white oil, ensures the stability of the product property, does not need to increase dehydration equipment, is simple to reform and has lower cost;
(3) device the flow is simple, can realize the online switching of production diesel oil and 5# industry white oil, need not to stop work, does not influence normal production, and the flexibility is strong.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing 5# industrial white oil in a wax oil hydrocracking process provided in example 1 of the present invention;
the system comprises a gas-liquid separator 1, a diesel oil stripping tower 2, a gas heater 3, a first booster pump 4, a first liquid flow meter 5, a first regulating valve 6, a distributor 7, a second booster pump 8, a second liquid flow meter 9 and a gas stripping gas feeding pipeline 10.
Detailed Description
To better explain the technical solution of the present invention, it is convenient to understand the technical solution of the present invention, and the following is further detailed description of the present invention, but the following embodiments are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention is subject to the claims.
The utility model provides a specific embodiment part provides a device of production 5# industry white oil in wax oil hydrocracking in-process, the device includes vapour and liquid separator 1, diesel oil strip tower 2 and gas heater 3, the diesel oil fraction export of the main fractionating tower of entry linkage of vapour and liquid separator 1, the liquid phase export of vapour and liquid separator 1 links to each other with the upper portion entry of diesel oil strip tower 2, two parallelly connected pipelines of entry linkage of gas heater 3, one is gas stripping gas feed line 10, and another links to each other with the lower part export of diesel oil strip tower 2, the export of gas heater 3 links to each other with the lower part entry of diesel oil strip tower 2, the bottom export output 5# industry white oil of diesel oil strip tower 2.
The following are typical but non-limiting examples of the present invention:
example 1:
this embodiment provides a device of production 5# industry white oil in wax oil hydrocracking in-process, the structural diagram of device is as shown in fig. 1, including vapour and liquid separator 1, diesel oil stripper 2 and gas heater 3, the diesel oil fraction export of the main fractionating tower of entry linkage of vapour and liquid separator 1, the liquid phase export of vapour and liquid separator 1 links to each other with the upper portion entry of diesel oil stripper 2, two parallel pipelines of entry linkage of gas heater 3, one is gas stripping gas feed line 10, and another links to each other with the lower part export of diesel oil stripper 2, the export of gas heater 3 links to each other with the lower part entry of diesel oil stripper 2, the 5# industry white oil of bottom export output of diesel oil stripper 2.
The gas phase outlet of the gas-liquid separator 1 is connected to a main fractionation column.
And the gas-liquid separator 1 is provided with a first liquid level meter.
And a first booster pump 4, a first liquid flow meter 5 and a first regulating valve 6 are sequentially arranged on a connecting pipeline of the gas-liquid separator 1 and the diesel stripping tower 2.
The diesel stripping tower 2 is a plate tower, and the number of the plate columns in the plate tower is 8.
The top outlet of the diesel stripper 2 is connected to the main fractionation column.
A distributor 7 is arranged in the diesel stripping tower 2, and the distributor 7 is positioned at an inlet of the gas heater 3 connected to the diesel stripping tower 2.
And a second liquid level meter is arranged at the lower part of the diesel stripping tower 2.
And the two parallel pipelines connected with the inlet of the gas heater 3 are provided with regulating valves.
The gas stripping gas is nitrogen, the gas heater 3 is also connected with a heat source pipeline, and the heat source is tail oil generated in the wax oil hydrocracking process.
And a second booster pump 8 and a second liquid flow meter 9 are sequentially arranged on a connecting pipeline of a bottom outlet of the diesel stripping tower 2.
Example 2:
this embodiment provides a device of production 5# industry white oil in wax oil hydrocracking in-process, the device includes vapour and liquid separator 1, diesel oil strip tower 2 and gas heater 3, the diesel oil fraction export of the main fractionating tower of entry linkage of vapour and liquid separator 1, the liquid phase export of vapour and liquid separator 1 links to each other with the upper portion entry of diesel oil strip tower 2, two parallelly connected pipelines of entry linkage of gas heater 3, one is gas stripping gas feed line 10, and another links to each other with the lower part export of diesel oil strip tower 2, the export of gas heater 3 links to each other with the lower part entry of diesel oil strip tower 2, the 5# industry white oil of bottom export output of diesel oil strip tower 2.
The gas phase outlet of the gas-liquid separator 1 is connected to a main fractionation column.
And a first booster pump 4, a first liquid flow meter 5 and a first regulating valve 6 are sequentially arranged on a connecting pipeline of the gas-liquid separator 1 and the diesel stripping tower 2.
The diesel stripping tower 2 is a plate tower, and the number of the plate-type towers is 10.
The top outlet of the diesel stripper 2 is connected to the main fractionation column.
A distributor 7 is arranged in the diesel stripping tower 2, and the distributor 7 is positioned at an inlet of the gas heater 3 connected to the diesel stripping tower 2.
And a switching valve is arranged at the junction of the two parallel pipelines connected with the inlet of the gas heater 3.
The gas stripping gas is methane, the gas heater 3 is also connected with a heat source pipeline, and the heat source is tail oil generated in the wax oil hydrocracking process.
And a second booster pump 8 and a second liquid flow meter 9 are sequentially arranged on a connecting pipeline of a bottom outlet of the diesel stripping tower 2.
The device in the embodiment is adopted to produce the No. 5 industrial white oil, the reaction and separation of wax oil hydrocracking and the fractionation of the main fractionating tower are carried out, one fraction is diesel oil fraction, the diesel oil fraction enters the device to be processed, the gas-liquid separation is firstly carried out, the liquid-phase component enters the diesel oil stripping tower after being pressurized, the diesel oil fraction is subjected to gas stripping by adopting the heated gas, the light components such as aviation kerosene and the like are stripped according to the composition characteristics of the diesel oil fraction, the opening flash point of the rest tower bottom components is higher, the kerosene smell is not generated, the standard requirement of the industrial white oil is met, the yield of the high value-added industrial white oil is improved, and the yield per hour can be increased by more than 60 t.
Comparative example 1:
this comparative example provides an apparatus for producing a diesel product in a wax oil hydrocracking process, the apparatus being of a construction according to example 1 except that: a reboiler is arranged at the same position without the gas heater 3, and the reboiler is not connected with a stripping gas feeding pipeline 10, and a diesel oil product is produced at the bottom outlet of the diesel oil stripping tower 2.
In the comparative example, because the diesel stripping tower adopts the traditional mode of heating by the reboiler to strip, the initial boiling point of the diesel fraction is lower, and aviation kerosene components are easy to mix in the diesel product during stripping, so that the flash point of the opening of the diesel product is lower, the diesel product has kerosene smell, the industrial standard of industrial white oil cannot be met, the industrial requirements of a hydrocracking device for reducing the yield of diesel and increasing the yield of the industrial white oil cannot be met.
It can be seen from the above examples and comparative examples that, the device of the utility model improves the diesel stripping tower in the fractionation system of the wax oil hydrocracking device, especially improves the reboiler at the tower bottom into the stripping gas heater, adopts hot gas to strip the diesel fraction, so that light components such as aviation kerosene in the diesel fraction are taken out, and the initial boiling point of the diesel fraction is improved, thereby meeting the standard requirement of 5# industrial white oil, increasing the yield of 5# industrial white oil with high added value, and improving economic benefit; the gas stripping gas adopts non-steam gas, so that more water is prevented from being introduced into the industrial white oil, the stability of the product property is ensured, no dehydration equipment is required to be added, the modification is simple, and the cost is low; the device flow is simple, can realize the online switching of production diesel oil and 5# industry white oil, need not to shut down, does not influence normal production, and the flexibility is strong.
The applicant states that the present invention is described in the above embodiments, but the present invention is not limited to the above detailed device, i.e. the present invention must not be implemented by relying on the above detailed device. It should be clear to those skilled in the art that any improvement of the present invention, to the addition of the equivalent replacement and auxiliary devices of the present invention, the selection of the specific mode, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. The utility model provides a device of production 5# industry white oil among wax oil hydrocracking process, a serial communication port, the device includes vapour and liquid separator, diesel oil strip tower and gas heater, the diesel oil fraction export of the main fractionating tower of entry linkage of vapour and liquid separator, the liquid phase export of vapour and liquid separator links to each other with the upper portion entry of diesel oil strip tower, two parallelly connected pipelines of entry linkage of gas heater, one is gas stripping gas feed line, and another links to each other with the lower part export of diesel oil strip tower, the export of gas heater links to each other with the lower part entry of diesel oil strip tower, the bottom export output 5# industry white oil of diesel oil strip tower.
2. The apparatus for producing # 5 technical white oil in wax oil hydrocracking process according to claim 1, wherein the gas phase outlet of the gas-liquid separator is connected to a main fractionation column.
3. The apparatus for producing # 5 industrial white oil in wax oil hydrocracking process according to claim 1, wherein a first booster pump, a first liquid flow meter and a first regulating valve are sequentially arranged on the connection pipeline of the gas-liquid separator and the diesel oil stripping tower.
4. The device for producing the 5# industrial white oil in the wax oil hydrocracking process according to claim 1, wherein the diesel oil stripping tower is a plate tower, and the number of the plates in the plate tower is 6-10.
5. An apparatus for producing # 5 technical white oil in a wax oil hydrocracking process according to claim 1, wherein the top outlet of the diesel stripper is connected to a main fractionator.
6. The apparatus for producing # 5 industrial white oil in wax oil hydrocracking process according to claim 1, wherein a distributor is provided in the diesel stripper column, the distributor being located at an inlet of the gas heater connected to the diesel stripper column.
7. The apparatus for producing 5# industrial white oil in wax oil hydrocracking process according to claim 1, wherein the two parallel pipelines connected with the inlet of the gas heater are provided with valves or the junction of the two parallel pipelines is provided with a switching valve.
8. The apparatus for producing # 5 industrial white oil in wax oil hydrocracking process of claim 1, wherein the stripping gas in the stripping gas feed line comprises nitrogen or gaseous light hydrocarbon, and the gaseous light hydrocarbon comprises any one of methane, ethane, propane or butane.
9. The apparatus for producing 5# industrial white oil in wax oil hydrocracking process according to claim 1, wherein the gas heater is further connected with a heat source pipeline, and the heat source comprises tail oil generated in wax oil hydrocracking process.
10. The apparatus for producing # 5 industrial white oil in wax oil hydrocracking process of claim 1, wherein a second booster pump and a second liquid flow meter are sequentially arranged on the connecting pipeline of the bottom outlet of the diesel oil stripping tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121521373.5U CN215162409U (en) | 2021-07-06 | 2021-07-06 | Device for producing 5# industrial white oil in wax oil hydrocracking process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121521373.5U CN215162409U (en) | 2021-07-06 | 2021-07-06 | Device for producing 5# industrial white oil in wax oil hydrocracking process |
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