CN209406280U - A kind of pre- hydrogenation plant feed system - Google Patents
A kind of pre- hydrogenation plant feed system Download PDFInfo
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- CN209406280U CN209406280U CN201822055343.4U CN201822055343U CN209406280U CN 209406280 U CN209406280 U CN 209406280U CN 201822055343 U CN201822055343 U CN 201822055343U CN 209406280 U CN209406280 U CN 209406280U
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- deoxidation
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Abstract
The utility model belongs to technical field of petrochemical industry, more particularly to a kind of pre- hydrogenation plant feed system, including low temperature heat exchanger, material heat exchanger, filter device, deoxidation tower and deoxidation tower head space cooler, naphtha feed pipe is sequentially connected low temperature heat exchanger, material heat exchanger, filter device and deoxidation tower feed inlet；The material outlet of deoxidation column overhead connects deoxidation tower head space cooler by pipeline, and deoxidation tower head space cooler discharge port is connected to deoxidation tower feed inlet by the pipe network that flows back；The material outlet of deoxidation tower tower bottom is connected to pre-add hydrogen unit feed surge tank by exporting pipe network；The deoxidation tower tower reactor is connected with tower bottom reboiler by pipeline.The utility model can effectively obstruct the generation of coking reaction, fundamentally reduce coking product.To protect catalyst for pre-hydrogenation and reactor, the skimming frequency is reduced, human and material resources is greatly reduced and pre- hydrogenation unit stops the operational risk of start-up process.Sound assurance is provided to device even running.
Description
Technical field
The utility model belongs to technical field of petrochemical industry, and in particular to a kind of pre- hydrogenation plant feed system.
Background technique
The raw material of catalytic reforming unit processing is naphtha, due to catalyst feed naphtha is required it is harsh, with being arranged
Set petroleum naphtha hydrogenation refined unit.Trace dissolved oxygen and tiny physical impurity are carried in pre- hydrogenating materials naphtha, are being passed through
High-temperature heater reaction is also easy to produce coking material, and coking material and physical impurity are finally adsorbed by pre-hydrogenator top catalyst,
Reactor pressure difference escalates whithin a period of time, causes pre- hydrogenation unit passively to be stopped work and carries out skimming removing coking to reactor
Object wastes financial resources, manpower, reduces working efficiency.
Summary of the invention
According to defect of the existing technology, the purpose of the utility model is to provide a kind of pre- hydrogenation plant feed system,
Dissolved oxygen and mechanical admixture in raw material can be removed, the reactor skimming frequency is reduced.
To achieve the above object, the technology employed by the present utility model is a kind of pre- hydrogenation plant feed system, packet
Low temperature heat exchanger, material heat exchanger, filter device, deoxidation tower and deoxidation tower head space cooler, naphtha feed pipe is included successively to connect
Connect low temperature heat exchanger, material heat exchanger, filter device and deoxidation tower feed inlet；The material outlet of deoxidation column overhead passes through pipeline
Deoxidation tower head space cooler is connected, deoxidation tower head space cooler discharge port is connected to deoxidation tower feed inlet by the pipe network that flows back；Deoxidation tower
The material outlet of tower bottom is connected to pre-add hydrogen unit feed surge tank by exporting pipe network；The deoxidation tower tower reactor is connected by pipeline
It is connected to tower bottom reboiler.
Further, the reflux pipe network includes return tank and reflux pump, and deoxidation tower head space cooler discharge port passes through pipeline
It is sequentially connected return tank, reflux pump and deoxidation tower feed inlet.
Further, fixed gas pipeline is arranged in the reflux tank deck, and fixed gas pipeline is connected separately with torch pipe network, pre-add
The main nozzles of hydrogen unit heating furnace and the main nozzles of reformer unit heating furnace, fixed gas pipeline control flow by the first control valve.
Further, the fuelgas pipeline for supplementing pressure is arranged in the reflux tank deck, and fuelgas pipeline passes through second
Control valve controls flow.
Further, the outlet pipe network includes deoxidation column bottoms pump and tower bottom air cooler, the material outlet of deoxidation tower tower bottom
Deoxidation column bottoms pump, material heat exchanger and tower bottom air cooler are sequentially connected by pipeline.
Further, the gas-liquid two-phase material outlet of the tower bottom reboiler is connected to deoxidation tower tower reactor by pipeline.
Further, third control valve is provided at the pan feeding of the naphtha feed pipe.
Further, the naphtha feed pipe is connected directly to pre-add hydrogen unit feed surge tank by crossover line,
Valve is set on crossover line.
The utility model has the following beneficial effects: the generation of coking reaction can be obstructed effectively, fundamentally reduces coking and produce
Object.To protect catalyst for pre-hydrogenation and reactor, the skimming frequency is reduced, human and material resources and pre-add hydrogen list are greatly reduced
Member stops the operational risk of start-up process.Sound assurance is provided to device even running.
Detailed description of the invention
Fig. 1 is utility model diagram,
In figure: 1, pre-add hydrogen unit feed surge tank, 2, low temperature heat exchanger, 3, material heat exchanger, 4, filtering dress
It sets, 5, deoxidation tower, 6, deoxidation tower head space cooler, 7, return tank, 8, reflux pump, 9, fixed gas pipeline, 10, flare stack
Net, 11, the pre- main nozzles of hydrogenation unit heating furnace, 12, the main nozzles of reformer unit heating furnace, 13, fuelgas pipeline, 14,
One control valve, 15, deoxidation column bottoms pump, 16, tower bottom air cooler, 17, tower bottom reboiler, 18, crossover line, 19, valve,
20, the second control valve, 21, third control valve.
Specific embodiment
In order to be more clear the structure and function of the utility model, with reference to the accompanying drawings and detailed description to this reality
It is described further with novel.
A kind of pre- hydrogenation plant feed system, including low temperature heat exchanger 2, material heat exchanger 3, filter device 4, deoxidation tower
5 and deoxidation tower head space cooler 6, naphtha feed pipe be sequentially connected low temperature heat exchanger 2, material heat exchanger 3,4 and of filter device
5 feed inlet of deoxidation tower；The material outlet of deoxidation column overhead connects deoxidation tower head space cooler 6, deoxidation tower head space cooler by pipeline
Discharge port is connected to deoxidation tower feed inlet by the pipe network that flows back；The material outlet of deoxidation tower tower bottom is connected to pre- by outlet pipe network
Hydrogenation unit feed surge tank 1；The deoxidation tower tower reactor is connected with tower bottom reboiler 17 by pipeline.
Further, the reflux pipe network includes return tank 7 and reflux pump 8, and 6 discharge port of deoxidation tower head space cooler passes through pipe
Line is sequentially connected 5 feed inlet of return tank 7, reflux pump 8 and deoxidation tower.
Further, the reflux tank deck is arranged fixed gas pipeline 9, fixed gas pipeline 9 be connected separately with torch pipe network 10,
The main nozzles 11 of pre- hydrogenation unit heating furnace and the main nozzles 12 of reformer unit heating furnace, fixed gas pipeline 9 pass through the first control valve 14
Control flow.
Further, the fuelgas pipeline 13 for supplementing pressure is arranged in the reflux tank deck, and fuelgas pipeline 13 passes through
Second control valve 20 controls flow.
Further, the outlet pipe network includes deoxidation column bottoms pump 15 and tower bottom air cooler 16, the material of deoxidation tower tower bottom
Outlet is sequentially connected deoxidation column bottoms pump 15, material heat exchanger 3 and tower bottom air cooler 16 by pipeline.The deoxidation of 5 tower bottom of deoxidation tower
Naphtha outlet afterwards is connect with material heat exchanger 3, is for making naphtha after deoxidation enter the naphtha before heat exchanger and deoxidation
Heat exchange.
Further, the gas-liquid two-phase material outlet of the tower bottom reboiler 17 is connected to 5 tower reactor of deoxidation tower by pipeline.
Further, third control valve 21 is provided at the pan feeding of the naphtha feed pipe.
The naphtha feed pipe is connected directly to pre-add hydrogen unit feed surge tank, crossover line by crossover line 18
Upper setting valve 19.
Increase low temperature heat exchanger 2 before naphtha enters deoxidation tower 5, after improving naphtha feed temperature, at charging
Increase filter device 4, remove mechanical admixture and simultaneously enter deoxidation column overhead, into the material in tower with the column plate in tower by
The micro amount of oxygen of the light component progress energy exchange that layer decline and tower bottom are come, partial material or dissolution is vaporized, and is entered through tower top de-
Oxygen column head space cooler 6 is cooled to 45 DEG C or so, and part light component becomes liquid again and enters return tank 7, and fixed gas is then with control
Fuel gas system is burnt (pre-add hydrogen F101 furnace and reformation R204 furnace) before valve is fed through heating furnace, the material in return tank
It is sent to deoxidation tower 5 again after the mixing of 5 tower top of deoxidation tower by reflux pump and charging.Materials at bottom of tower is then by deoxidation column bottoms pump 15
It exchanges heat with charging, is cooled to room temperature through air cooler 16 and is transported to pre-add hydrogen unit feed surge tank 1.Tower bottom reboiler 17
Using 1.0MPa steam as 5 heat source of deoxidation tower.The fuelgas pipeline 13 of one DN40 is set in reflux tank deck, passes through control valve
14 control flows enter in return tank 7, are the benefit of return tank 7 by this pipeline when pressure is lower than technic index in return tank 7
Pressurising power.It is finally reached and removes the purpose of mechanical admixture and dissolved oxygen in raw material.Reduce the reactor skimming frequency.
The device has the advantage that
1. the present apparatus can reduce the pre-hydrogenator skimming frequency, by quarterly skimming reduces the frequency to every half a year originally
Even longer time skimming is primary, greatly reduces human and material resources and pre- hydrogenation unit stops the operational risk of start-up process.It is right
Device even running provides sound assurance.
2. increasing naphtha feed low temperature heat exchanger, naphtha feed temperature is improved, deoxidation tower is substantially reduced and boils steaming again
Vapour dosage, reduces plant energy consumption.Low temperature heat exchanger be by the condensed water of reformer thermal technology's surplus (100 DEG C of temperature, pressure
Heat exchange utilization 0.9MPa) is carried out, naphtha feed temperature is greatly improved by 20 DEG C of 83 DEG C improved to after exchanging heat after heat exchange
Deoxidation column overhead temperatures improve deoxidation effect, while reducing tower bottom and boiling steam consumption again.
3. deoxidation tower top fixed gas fuel tolerance is averagely about 300-800kg/h, engineered design send fixed gas to pre-
The main nozzles of hydrogenation unit heating furnace, the main nozzles of reformer unit heating furnace independently burn, and do not influence heating furnace burning not only, together
When also recycled fixed gas, the fuel gas dosage of pre- hydrogenation unit heating furnace and reformer unit heating furnace is greatly reduced, to drop
Low plant energy consumption effect highly significant.
Listed above is only the most preferred embodiment of the utility model.Obviously, the utility model is not limited to above embodiments,
It is acceptable that there are many deformations.Those skilled in the art directly can export or associate from content disclosed by the utility model
All deformations, be considered as the protection scope of the utility model.
Claims (8)
1. a kind of pre- hydrogenation plant feed system, it is characterised in that: including low temperature heat exchanger, material heat exchanger, filter device,
Deoxidation tower and deoxidation tower head space cooler, naphtha feed pipe be sequentially connected low temperature heat exchanger, material heat exchanger, filter device and
Deoxidation tower feed inlet；The material outlet of deoxidation column overhead connects deoxidation tower head space cooler by pipeline, and deoxidation tower head space cooler goes out
Material mouth is connected to deoxidation tower feed inlet by the pipe network that flows back；The material outlet of deoxidation tower tower bottom is connected to pre-add by exporting pipe network
Hydrogen unit feed surge tank；The deoxidation tower tower reactor is connected with tower bottom reboiler by pipeline.
2. a kind of pre- hydrogenation plant feed system according to claim 1, it is characterised in that: the reflux pipe network includes back
Stream tank and reflux pump, deoxidation tower head space cooler discharge port are sequentially connected return tank, reflux pump and deoxidation tower feed inlet by pipeline.
3. a kind of pre- hydrogenation plant feed system according to claim 2, it is characterised in that: the reflux tank deck setting is not
Solidifying gas pipeline, fixed gas pipeline are connected separately with torch pipe network, the main nozzles of pre- hydrogenation unit heating furnace and reformer unit heating furnace
Main nozzles, fixed gas pipeline control flow by the first control valve.
4. a kind of pre- hydrogenation plant feed system according to claim 2, it is characterised in that: the reflux tank deck setting is used
In the fuelgas pipeline of supplement pressure, fuelgas pipeline controls flow by the second control valve.
5. a kind of pre- hydrogenation plant feed system according to claim 1, it is characterised in that: the outlet pipe network includes de-
The material outlet of oxygen column bottoms pump and tower bottom air cooler, deoxidation tower tower bottom is sequentially connected deoxidation column bottoms pump, material-heat-exchanging by pipeline
Device and tower bottom air cooler.
6. a kind of pre- hydrogenation plant feed system according to claim 1, it is characterised in that: the gas of the tower bottom reboiler
Liquid two-phase material outlet is connected to deoxidation tower tower reactor by pipeline.
7. a kind of pre- hydrogenation plant feed system according to claim 1, it is characterised in that: the naphtha feed pipe
Third control valve is provided at pan feeding.
8. a kind of pre- hydrogenation plant feed system according to claim 1, it is characterised in that: the naphtha feed pipe is logical
It crosses crossover line and is connected directly to pre-add hydrogen unit feed surge tank, valve is set on crossover line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822055343.4U CN209406280U (en) | 2018-12-08 | 2018-12-08 | A kind of pre- hydrogenation plant feed system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822055343.4U CN209406280U (en) | 2018-12-08 | 2018-12-08 | A kind of pre- hydrogenation plant feed system |
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| CN209406280U true CN209406280U (en) | 2019-09-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835549A (en) * | 2019-12-21 | 2020-02-25 | 大连福佳·大化石油化工有限公司 | Shunting and filtering system of aromatic hydrocarbon device |
-
2018
- 2018-12-08 CN CN201822055343.4U patent/CN209406280U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835549A (en) * | 2019-12-21 | 2020-02-25 | 大连福佳·大化石油化工有限公司 | Shunting and filtering system of aromatic hydrocarbon device |
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