CN202638847U - Oxidation reclaiming device for alkali residues containing sodium sulphide - Google Patents
Oxidation reclaiming device for alkali residues containing sodium sulphide Download PDFInfo
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- CN202638847U CN202638847U CN 201220171067 CN201220171067U CN202638847U CN 202638847 U CN202638847 U CN 202638847U CN 201220171067 CN201220171067 CN 201220171067 CN 201220171067 U CN201220171067 U CN 201220171067U CN 202638847 U CN202638847 U CN 202638847U
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- alkaline residue
- oxidation
- knockout tower
- disulphide
- gas distributor
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Abstract
The utility model relates to an oxidation reclaiming device for alkali residues containing sodium sulphide, which comprises an alkali residue oxidation separating column, wherein a baffle is arranged in the alkali residue oxidation separating column, the interior of the alkali residue oxidation separating column is divided into an oxidation zone and a gas stripping and fine removing zone by the baffle, the bottom end of the oxidation zone is communicated with an alkali residue feeding pipe, the top and the bottom of the oxidation zone are respectively provided with a defoaming device and a first gas distributor, the bottom end of the gas stripping and fine removing zone is communicated with an alkali residue discharging pipe, and the bottom of the gas stripping and fine removing zone is provided with a second gas distributor. The utility model has the beneficial effects that the sodium sulphide in the alkali residues is oxidized and reduced below 1ppm by a whole-phase contact microbubble oxidation technology, and the separation and reclaiming of disulphide are realized.
Description
Technical field
The utility model relates to a kind of oxidation regeneration device that contains the sodium mercaptides alkaline residue.
Background technology
The liquefied petroleum gas of oil plant production mostly adopts the extracting of amine liquid to remove hydrogen sulfide, the alkali cleaning of hydroxide sodium sodium water solution removes mercaptan, in recent years along with the raising that the gasoline product total sulfur is required, increasing device is cut into light petrol and two kinds of components of heavy petrol with gasoline, heavy petrol adopts hydrodesulfurization, light petrol adopts caustic wash desulfuration alcohol, to reduce the gasoline hydrodesulfurizationmethod cost.
The alkali lye that liquefied gas, light petrol removal of mercaptans are used generally all is designed with the oxidation regeneration facility, but owing to mostly adopt the conventional filler oxidizing tower, the disulphide that can't separation of oxygenated generates, and along with the accumulation of disulphide in alkali lye raises, direct product liquefied gas, light petrol total sulfur are increased, qualified for guaranteeing product liquefied gas total sulfur, take the way of frequent alkali lye to control the product total sulfur.The oil plant of each refining capacity more than the 3000000 tons therefore alkaline residue of discharging surpasses 1000 ton/years, and all refinery's discharging alkaline residue total amounts of the whole nation are above 50,000 ton/years.
Oil plant adopts more alkaline residue processing method to have dense mercaptan neutralization, refinery's sour water neutralization, high-temperature wet-oxidation, calcination to reclaim caustic soda or sodium acid carbonate etc. at present, also there is specialty to reclaim for the unit that processes alkaline residue, the about 2000-5000 of alkaline residue handling yuan/ton.Therefore, be quite surprising at manpower and the funds that the processing of liquid gas sweetening alkaline residue drops into domestic every year.Therefore being badly in need of a kind of equipment solves the problems referred to above.
The utility model content
The purpose of this utility model provides a kind of oxidation regeneration device that contains the sodium mercaptides alkaline residue, sodium mercaptides complete oxidation in the alkaline residue is converted into NaOH and disulphide, disulphide thoroughly separates, recovery is as the industrial chemicals utilization, the alkali lye that thoroughly removes sodium mercaptides and disulphide can be recycled, and overcomes present prior art above shortcomings.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of oxidation regeneration device that contains the sodium mercaptides alkaline residue, comprise alkaline residue oxidation knockout tower, the top of described alkaline residue oxidation knockout tower is provided with tail gas discharging pipe, the both sides of alkaline residue oxidation knockout tower bottom are respectively equipped with alkaline residue feed pipe and alkaline residue discharge nozzle, the inside of alkaline residue oxidation knockout tower is provided with dividing plate, the inside of alkaline residue oxidation knockout tower is divided into zoneofoxidation with dividing plate and the air lift essence is taken off the district, the bottom of zoneofoxidation is communicated with the alkaline residue feed pipe, the top of zoneofoxidation and bottom are respectively equipped with demister and gas distributor one, the bottom that the air lift essence is taken off the district is communicated with the alkaline residue discharge nozzle, and the bottom that the air lift essence is taken off the district is provided with gas distributor two.
Further, the bottom of described demister is provided with skimming tank, and the bottom of skimming tank has alkaline residue from head piece, and a side of skimming tank connects the disulphide delivery pipe, and the disulphide delivery pipe passes alkaline residue oxidation knockout tower and the outside exposed and this alkaline residue oxidation knockout tower.
Further, described gas distributor one is connected with gas distributor and is connected with the compressed air feed pipe respectively, and the compressed air feed pipe passes alkaline residue oxidation knockout tower and the outside exposed and this alkaline residue oxidation knockout tower.
Further, the top of described dividing plate is provided with the alkaline residue overfall.
The beneficial effects of the utility model are: adopt the microvesicle oxidation technology that entirely contacts, sodium mercaptides oxidation in the alkaline residue is reduced to below the 1ppm, and realize separating and reclaim disulphide, and the disulphide that reclaims can be used as the industrial chemicals utilization; Adopt simultaneously microvesicle dissolved air flotation technology that the disulphide that generates is removed to below the 1ppm.Sodium mercaptides and disulphide all are controlled at below the 1ppm in the alkaline residue behind the oxidation regeneration, and main component is NaOH and water in the alkaline residue, can be recycled.The utility model has also that the alkaline residue treatment effect is good, the characteristics of environmental protection and economy.
Description of drawings
The below is described in further detail the utility model with reference to the accompanying drawings.
Fig. 1 is the described structural representation that contains the oxidation regeneration device of sodium mercaptides alkaline residue of the utility model embodiment.
Among the figure:
1, alkaline residue oxidation knockout tower; 2, tail gas discharging pipe; 3, alkaline residue feed pipe; 4, alkaline residue discharge nozzle; 5, dividing plate; 6, zoneofoxidation; 7, the air lift essence is taken off the district; 8, demister; 9, gas distributor one; 10, gas distributor two; 11, skimming tank; 12, alkaline residue is from head piece; 13, disulphide delivery pipe; 14, compressed air feed pipe; 15, alkaline residue overfall.
The specific embodiment
As shown in Figure 1, the described a kind of oxidation regeneration device that contains the sodium mercaptides alkaline residue of the utility model embodiment, comprise alkaline residue oxidation knockout tower 1, the top of described alkaline residue oxidation knockout tower 1 is provided with tail gas discharging pipe 2, the both sides of alkaline residue oxidation knockout tower 1 bottom are respectively equipped with alkaline residue feed pipe 3 and alkaline residue discharge nozzle 4, the inside of alkaline residue oxidation knockout tower 1 is provided with dividing plate 5, the inside of alkaline residue oxidation knockout tower 1 is divided into zoneofoxidation 6 with dividing plate 5 and the air lift essence is taken off district 7, the bottom of zoneofoxidation 6 is communicated with alkaline residue feed pipe 3, the top of zoneofoxidation 6 and bottom are respectively equipped with demister 8 and gas distributor 1, the bottom that the air lift essence is taken off district 7 is communicated with alkaline residue discharge nozzle 4, and the bottom that the air lift essence is taken off district 7 is provided with gas distributor 2 10.The bottom of described demister 8 is provided with skimming tank 11, the bottom of skimming tank 11 has alkaline residue from head piece 12, one side of skimming tank 11 connects disulphide delivery pipe 13, and disulphide delivery pipe 13 passes alkaline residue oxidation knockout tower 1 and the outside exposed and this alkaline residue oxidation knockout tower 1.Described gas distributor 1 is connected with gas distributor and 10 is connected with compressed air feed pipe 14 respectively, and compressed air feed pipe 14 passes alkaline residue oxidation knockout tower 1 and the outside exposed and this alkaline residue oxidation knockout tower 1.The top of described dividing plate 5 is provided with alkaline residue overfall 15.
When the described a kind of oxidation regeneration device that contains the sodium mercaptides alkaline residue of the utility model embodiment uses, may further comprise the steps:
1) will enter in the zoneofoxidation 6 of alkaline residue oxidation knockout tower 1 by alkaline residue feed pipe 3 from the alkaline residue (liquid gas sweetening alkaline residue and light petrol removal of mercaptans alkaline residue) after liquefied gas or light petrol sweetening unit and the processing of process depriving hydrogen sulphide, make the alkaline residue that enters with the linear velocity come-up of 0.1-1mm/s, compressed air is dispersed into the micro-bubble of 0.1-1mm diameter by gas distributor 1 simultaneously, bubble linear velocity with 1-10mm/s in alkaline residue rises, two-phase fully contacts and the alkali lye time of staying reaches 10-30 hour, and be heated to 30-65 ℃, and the optimum oxidation desulfurization temperature is 40-55 ℃, make that sodium mercaptides is oxidized to NaOH and disulphide in the alkaline residue, the disulphide that generates is attached to the bubble outer wall and arrives the alkaline residue liquid level with bubble floating, bubble breaks when leaving the alkaline residue liquid level, break during a small amount of foam process demister 8, be used for reducing tail gas alkaline residue and the disulphide amount of carrying secretly, disulphide liquefaction also forms the disulphide layer on the alkaline residue upper strata, alkaline residue and disulphide liquefaction are stayed in the tower, collect by skimming tank 11, and disulphide is given off the utility model device;
2) the alkaline residue overfall 15 of the alkaline residue after processing through step 1) by dividing plate 5 tops flows to the air lift essence and takes off district 7, this moment, compressed air was dispersed into the bubble of 5-10mm diameter by gas distributor 2 10, bubble and alkaline residue reverse flow, in the alkaline residue residual Determination of Trace Sulfur sodium alkoxide by exhaustive oxidation to 1ppm, simultaneously in dissolving, under the dissolved air flotation effect, the disulphide that residual disulphide and gas generate in the alkaline residue is all taken away with gas tail gas, take away that disulphide is reduced to below the 1ppm in the rear alkaline residue, after the oxidation in the alkaline residue main component be NaOH and water, from the air lift essence take off the district 7 bottom alkaline residue discharge nozzles 4 send the utility model device;
3) process step 2) tail gas after the processing is sent the utility model device from tail gas row 2 discharges at alkaline residue oxidation knockout tower 1 top, and the tail gas of discharge is sent into the burning facility burning and carried out the desulfurization processing, discharges after reaching national relevant discharge index.
Application example:
XX company adopts the utility model device, has built up a cover liquid gas sweetening alkaline residue oxidation regeneration device: alkaline residue disposal ability: 1t/h; Alkaline residue forms: naoh concentration 6-12%wt, vulcanized sodium trace, sodium mercaptides concentration 0.5-1%wt, concentration of sodium thiosulfate 0.5-1.5%wt, disulphide content 500-1200ppm; Main equipment specification: alkaline residue oxidation knockout tower Φ 2000 * 12000(mm); Process operation parameter: 30-55 ℃ of alkaline residue oxidizing temperature, oxidation compressed air require 10-20Nm3/h, oxidation compressed air require 20-50Nm3/h; The device operation result: alkaline residue naoh concentration 8-13%wt, concentration of sodium thiosulfate 0.5-1.5%wt, sodium mercaptides and disulphide content are trace (not measuring) behind the oxidation regeneration.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but do any variation in its shape or structure; every have identical with a application or akin technical scheme, all drops within the protection domain of the present utility model.
Claims (4)
1. oxidation regeneration device that contains the sodium mercaptides alkaline residue, comprise alkaline residue oxidation knockout tower (1), the top of described alkaline residue oxidation knockout tower (1) is provided with tail gas discharging pipe (2), the both sides of alkaline residue oxidation knockout tower (1) bottom are respectively equipped with alkaline residue feed pipe (3) and alkaline residue discharge nozzle (4), it is characterized in that: the inside of alkaline residue oxidation knockout tower (1) is provided with dividing plate (5), the inside of alkaline residue oxidation knockout tower (1) is divided into zoneofoxidation (6) with dividing plate (5) and the air lift essence is taken off district (7), the bottom of zoneofoxidation (6) is communicated with alkaline residue feed pipe (3), the top of zoneofoxidation (6) and bottom are respectively equipped with demister (8) and gas distributor one (9), the bottom that the air lift essence is taken off district (7) is communicated with alkaline residue discharge nozzle (4), and the bottom that the air lift essence is taken off district (7) is provided with gas distributor two (10).
2. the oxidation regeneration device that contains the sodium mercaptides alkaline residue according to claim 1, it is characterized in that: the bottom of described demister (8) is provided with skimming tank (11), the bottom of skimming tank (11) has alkaline residue from head piece (12), one side of skimming tank (11) connects disulphide delivery pipe (13), the outside that disulphide delivery pipe (13) passes alkaline residue oxidation knockout tower (1) and stretches out this alkaline residue oxidation knockout tower (1).
3. the oxidation regeneration device that contains the sodium mercaptides alkaline residue according to claim 2, it is characterized in that: described gas distributor one (9) are connected with gas distributor (10) be connected respectively the outside that compressed air feed pipe (14) passes alkaline residue oxidation knockout tower (1) and stretches out this alkaline residue oxidation knockout tower (1) with compressed air feed pipe (14).
4. each described oxidation regeneration device that contains the sodium mercaptides alkaline residue according to claim 1-3, it is characterized in that: the top of described dividing plate (5) is provided with alkaline residue overfall (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171067 CN202638847U (en) | 2012-04-20 | 2012-04-20 | Oxidation reclaiming device for alkali residues containing sodium sulphide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171067 CN202638847U (en) | 2012-04-20 | 2012-04-20 | Oxidation reclaiming device for alkali residues containing sodium sulphide |
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| Publication Number | Publication Date |
|---|---|
| CN202638847U true CN202638847U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220171067 Withdrawn - After Issue CN202638847U (en) | 2012-04-20 | 2012-04-20 | Oxidation reclaiming device for alkali residues containing sodium sulphide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671912A (en) * | 2012-04-20 | 2012-09-19 | 宁波中一石化科技有限公司 | Oxidation regeneration device and method for caustic sludge containing NaSR |
-
2012
- 2012-04-20 CN CN 201220171067 patent/CN202638847U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671912A (en) * | 2012-04-20 | 2012-09-19 | 宁波中一石化科技有限公司 | Oxidation regeneration device and method for caustic sludge containing NaSR |
| CN102671912B (en) * | 2012-04-20 | 2014-05-14 | 宁波中一石化科技有限公司 | Oxidation regeneration device and method for caustic sludge containing NaSR |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130102 Effective date of abandoning: 20140514 |
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| RGAV | Abandon patent right to avoid regrant |