CN205127688U - Device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled - Google Patents
Device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled Download PDFInfo
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- CN205127688U CN205127688U CN201520947615.5U CN201520947615U CN205127688U CN 205127688 U CN205127688 U CN 205127688U CN 201520947615 U CN201520947615 U CN 201520947615U CN 205127688 U CN205127688 U CN 205127688U
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- tail gas
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- knockout drum
- fiber film
- waste water
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Abstract
The utility model discloses a device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled, including tail gas water washing tank, fibre liquid membrane contactor and knockout drum, the internal of tail gas water washing tank has set gradually except that foam net no. 1 and air distributor from the top down to becoming unloading district, reaction zone and waste water district to the internal space division of jar from the top down, be provided with the washing in the reaction zone and pack, the upper end of jar body is provided with that tail gas mouth, lower extreme are provided with wastewater port, the centre is provided with the tail gas inlet pipe, the tail gas mouth passes through the tail gas connecting pipe and links to each other with fibre liquid membrane contactor, the external waste water discharging pipe of wastewater port, tail gas inlet pipe and air distributor butt joint, its advantage lies in: the free complete desorption of alkali lye is carried in with tail gas secretly in the assurance, and the alkali lye of avoiding carrying secretly in the tail gas gets into the low reaches desulfurization and absorbs with in the diesel oil, can be with disulphide content desorption in the tail gas to below the 100mgm3.
Description
Technical field
The utility model relates to the device removing disulphide in tail gas, the specifically device of the alkali liquor oxidized tail gas environmental protection treatment of a kind of lighter hydrocarbons desulfurization.
Background technology
The light hydrocarbon products such as dry gas, liquefied gas, gasoline generally all can be had in crude refining process to produce, owing to containing sulfide to some extent in crude oil, mostly containing hydrogen sulfide, mercaptan sulfides in these light hydrocarbon products.Current oil plant all has the desulfurizer of the light hydrocarbon products such as dry gas, liquefied gas, gasoline, and removing hydrogen sulfide substantially all adopts amine to wash technique, and removing mercaptan, to adopt more be alkali washing process, and gasoline takes off total sulfur the most effectively hydrodesulfurization technology.
Lighter hydrocarbons desulfurization adopts the device of alkali washing process, and major part is designed with alkali liquor oxidized regenerating unit, and alkaline cleaner cannot be avoided having alkaline residue discharge simultaneously, and part oil refining enterprise has alkaline residue oxidation treatment device.No matter be the alkali liquor oxidized device of lighter hydrocarbons desulfurization, or alkaline residue oxidation unit, the most frequently used oxidant is air, and therefore these devices all can have tens to hundreds of Nm
3the stench exhaust emissions containing disulphide of/h, in tail gas, disulphide content is at several thousand to tens0000 mg/Nm
3.
At present, lighter hydrocarbons desulfurization alkali lye or alkaline residue oxidized tail gas mostly send to incinerator or heating furnace burns, and disulphide generates sulfur dioxide after burning, dew point corrosion can be produced to carbon steel equipment, after burning, in emission, content of sulfur dioxide is higher, if burned not exclusively, tail gas foul odour is more serious.If directly discharge air containing sulfur dioxide and the tail gas of disulphide that do not burn completely, environmental pollution is very serious.
The mercaptan that lighter hydrocarbons alkali cleaning can remove is mainly C
1-C
3small-molecular-weight mercaptan, alkali lye or alkaline residue oxidation time generate alkyl (Rn) be C
1-C
3dialkyl disulphides (R
1sSR
2) mixture, boiling point is between 109-160 DEG C, and density is (with water density 1.00g/mL for benchmark) between 0.98-1.07g/mL, and alkyl carbon number amount is less, and disulphide boiling point is lower, and density is larger.Pure disulphide is weak yellow liquid, has similar rotten Chinese cabbage nauseating bad odor, has certain volatility and corrosivity, water-soluble hardly, can be dissolved in nearly all organic solvent at normal temperatures with any ratio.
Utilize the character that in the alkali liquor oxidized emission of lighter hydrocarbons desulfurization, disulphide can dissolve each other with organic solvent, the utility model patent adopts special mass transfer apparatus and diesel oil absorption techniques, within disulphide content in alkali liquor oxidized tail gas being removed to " odorant pollutant discharge standard GB/T 14554-1993 " index of correlation.
Utility model content
The utility model is not enough for prior art, provides a kind of device that can be used in the alkali liquor oxidized tail gas environmental protection treatment of lighter hydrocarbons desulfurization removing disulphide in tail gas.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: the device of the alkali liquor oxidized tail gas environmental protection treatment of a kind of lighter hydrocarbons desulfurization, comprises tail gas water washing tank, fiber film contactor and knockout drum; Foam removal net one and gas distributor is disposed with from the top down in the body of tail gas water washing tank, and from the top down compartition in tank body being become emptying district, water wash zone and waste water district, be provided with washing filler in water wash zone, the upper end of tank body is provided with tail gas mouth, lower end is provided with waste water mouth, middle and lower part is provided with tail gas feed pipe; Tail gas mouth is connected with fiber film contactor by tail gas tube connector, the external waste water discharge nozzle of waste water mouth, and tail gas feed pipe docks with gas distributor; Fiber film contactor is arranged on knockout drum by flange and also partly stretches in the tank body of knockout drum, undulatory stainless steel fiber is provided with in fiber film contactor, foam removal net two is provided with in knockout drum, the periphery of foam removal net two is along being arranged on the inwall of knockout drum, inner edge is arranged on the outer surface of fiber film contactor, and the tank body space of knockout drum is divided into exhaust area and diesel oil district from the top down, exhaust area is circumscribed with tail gas discharge nozzle; The top of fiber film contactor is provided with liquid distributor, and liquid distributor docks with the diesel fuel filter of outside and low-sulfur diesel-oil feed pipe successively; The bottom of knockout drum is provided with diesel oil outlet, and diesel oil outlet is circumscribed with diesel cycle pipe; To mix at fiber film contactor from tail gas the tube connector tail gas entered and the low sulfur petroleum flowed into from diesel fuel filter and react.
Diesel cycle pipe is provided with diesel cycle pump, the diesel oil part after diesel cycle pump is discharged by diesel oil discharge nozzle, and some enters liquid distributor again by low-sulfur diesel-oil feed pipe and diesel fuel filter.
The utility model compared with prior art, has following beneficial effect: ensure to remove carrying free alkali lye in tail gas secretly completely, avoids the alkali lye carried secretly in tail gas to enter in downstream desulfurization absorption diesel oil; Disulphide content in tail gas can be removed to 100mg/m
3below.
Accompanying drawing explanation
Fig. 1 is the process chart of the lighter hydrocarbons doctor solution oxidized tail gas environmental protection treatment of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail: see Fig. 1, in figure, mark is as follows: tail gas water washing tank 1, tail gas mouth 1a, emptying district 1b, water wash zone 1c, waste water district 1d, waste water mouth 1e, gas distributor 2, washing filler 3, foam removal net 1, fiber film contactor 5, exhaust area 5a, diesel oil district 5b, liquid distributor 6, stainless steel fiber 7, knockout drum 8, foam removal net 29, diesel fuel filter 10, diesel cycle pump 11, tail gas feed pipe 12, tail gas tube connector 13, tail gas discharge nozzle 14, low-sulfur diesel-oil feed pipe 15, diesel cycle pipe 16, diesel oil discharge nozzle 17, waste water discharge nozzle 18.
A device for the alkali liquor oxidized tail gas environmental protection treatment of lighter hydrocarbons desulfurization, comprises tail gas water washing tank 1, fiber film contactor 5 and knockout drum 8; Foam removal net 1 and gas distributor 2 is disposed with from the top down in the body of tail gas water washing tank 1, and from the top down compartition in tank body being become emptying district 1b, water wash zone 1c and waste water district 1d, be provided with washing filler 3 in water wash zone, the upper end of tank body is provided with tail gas mouth 1a, lower end is provided with waste water mouth 1e, middle and lower part is provided with tail gas feed pipe 12; Tail gas mouth is connected with fiber film contactor 5 by tail gas tube connector 13, and the external waste water discharge nozzle 18 of waste water mouth, tail gas feed pipe 12 docks with gas distributor 2.
Fiber film contactor 5 is arranged on knockout drum 8 by flange and also partly stretches in the tank body of knockout drum, undulatory stainless steel fiber 7 is provided with in fiber film contactor 5, foam removal net 29 is provided with in knockout drum 8, the periphery of foam removal net 29 is along being arranged on the inwall of knockout drum, inner edge is arranged on the outer surface of fiber film contactor, and the tank body space of knockout drum 8 is divided into exhaust area 5a and diesel oil district 5b from the top down, exhaust area is circumscribed with tail gas discharge nozzle 14.
The top of fiber film contactor 5 is provided with liquid distributor 6, and liquid distributor 6 docks with the diesel fuel filter 10 of outside and low-sulfur diesel-oil feed pipe 15 successively; The bottom of knockout drum 8 is provided with diesel oil outlet, and diesel oil outlet is circumscribed with diesel cycle pipe 16.
From tail gas tube connector 13 tail gas entered and the low sulfur petroleum flowed into from diesel fuel filter 10 in the raw displacement reaction of fiber film contactor 5 hybrid concurrency, to reach the object of tail gas desulfurization.
Diesel cycle pipe 16 is provided with diesel cycle pump 11, the diesel oil part after diesel cycle pump 11 is discharged by diesel oil discharge nozzle 17, and some enters liquid distributor 6 again by low-sulfur diesel-oil feed pipe 15 and diesel fuel filter 10.
According to the difference of disulphide content in tail gas, every 100Nm
3the tail gas of/h, needs diesel cycle flow 1-5m
3/ h, supplement into the low-sulfur diesel-oil of device and the high sulfur-containing diesel flow that gives off device be 0.5-3m
3/ h, the diesel oil entering device requires that temperature is 5-40 DEG C of scope, and total sulfur content is no more than 150ppm, disulphide content in tail gas can be removed to 100mg/m
3below.
From the alkali liquor oxidized tail gas of delayed coking unit liquid gas sweetening unit, gas flow 90-120Nm
3/ h, operating pressure 0.3MPa(G), disulphide content 10000-25000mg/Nm
3, adopt device, diesel cycle flow is 4000-4500Kg/h, enter the low-sulfur diesel-oil total sulfur 125ppm of device, temperature 30-40 DEG C, flow is 1000-1300Kg/h, go out the high sulfur-containing diesel flow average out to 1000-1300Kg/h of device, after desulfurization, in tail gas, total sulfur content is 60-85mg/Nm
3, send to after incinerator burns the lighter hydrocarbons carried secretly in tail gas and residual micro-disulphide, through catalysis smoke stack emission air, reach " odorant pollutant discharge standard GB/T 14554-1993 " index of correlation.
Claims (2)
1. a device for the alkali liquor oxidized tail gas environmental protection treatment of lighter hydrocarbons desulfurization, is characterized in that, comprises tail gas water washing tank (1), fiber film contactor (5) and knockout drum (8), foam removal net one (4) and gas distributor (2) is disposed with from the top down in the body of described tail gas water washing tank (1), and from the top down compartition in tank body being become emptying district (1b), water wash zone (1c) and waste water district (1d), be provided with washing filler (3) in described water wash zone, the upper end of tank body is provided with tail gas mouth (1a), lower end is provided with waste water mouth (1e), middle and lower part is provided with tail gas feed pipe (12), described tail gas mouth is connected with described fiber film contactor (5) by tail gas tube connector (13), the external waste water discharge nozzle (18) of described waste water mouth, and described tail gas feed pipe (12) is docked with described gas distributor (2), described fiber film contactor (5) is arranged on the upper also part of described knockout drum (8) by flange and stretches in the tank body of knockout drum, undulatory stainless steel fiber (7) is provided with in described fiber film contactor (5), foam removal net two (9) is provided with in described knockout drum (8), the periphery of described foam removal net two (9) is along being arranged on the inwall of knockout drum, inner edge is arranged on the outer surface of described fiber film contactor, and the tank body space of knockout drum (8) is divided into exhaust area (5a) and diesel oil district (5b) from the top down, described exhaust area is circumscribed with tail gas discharge nozzle (14), the top of described fiber film contactor (5) is provided with liquid distributor (6), and described liquid distributor (6) docks with the diesel fuel filter (10) of outside and low-sulfur diesel-oil feed pipe (15) successively, the bottom of described knockout drum (8) is provided with diesel oil outlet, and described diesel oil outlet is circumscribed with diesel cycle pipe (16), the tail gas entered from tail gas tube connector (13) mixes with the low sulfur petroleum flowed into from diesel fuel filter (10) at fiber film contactor (5) and reacts.
2. the device of the alkali liquor oxidized tail gas environmental protection treatment of a kind of lighter hydrocarbons desulfurization as claimed in claim 1, it is characterized in that: described diesel cycle pipe (16) is provided with diesel cycle pump (11), a diesel oil part after described diesel cycle pump (11) is discharged by diesel oil discharge nozzle (17), and some enters liquid distributor (6) again by low-sulfur diesel-oil feed pipe (15) and diesel fuel filter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520947615.5U CN205127688U (en) | 2015-11-25 | 2015-11-25 | Device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520947615.5U CN205127688U (en) | 2015-11-25 | 2015-11-25 | Device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205127688U true CN205127688U (en) | 2016-04-06 |
Family
ID=55613513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520947615.5U Active CN205127688U (en) | 2015-11-25 | 2015-11-25 | Device that environmental protection of lighter hydrocarbons desulfurization alkali lye oxidation tail gas was handled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205127688U (en) |
-
2015
- 2015-11-25 CN CN201520947615.5U patent/CN205127688U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |