CN205953515U - Regeneration system of peace and quiet spent acid of acetylene - Google Patents
Regeneration system of peace and quiet spent acid of acetylene Download PDFInfo
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- CN205953515U CN205953515U CN201620898749.7U CN201620898749U CN205953515U CN 205953515 U CN205953515 U CN 205953515U CN 201620898749 U CN201620898749 U CN 201620898749U CN 205953515 U CN205953515 U CN 205953515U
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- acid
- sulphuric acid
- oxidation
- acetylene
- spent acid
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Abstract
The utility model relates to a regeneration system of peace and quiet spent acid of acetylene, it includes low temperature oxidation unit and vacuum concentration device, low temperature oxidation unit include dioxygen water metering jar, oxidation reation kettle, diluted acid delivery pump and catalyst filter, oxidation reation kettle top is equipped with hydrogen peroxide solution import and spent acid import, the bottom discharge mouth intercommunication oxidation reation kettle's of dioxygen water metering jar hydrogen peroxide solution import, oxidation reation kettle's bottom discharge antilinear diluted acid delivery pump communicates the catalyst filter. The utility model discloses a hydrogen peroxide solution oxidation is retrieved for sour regeneration and has been created the condition, can effectively carry out the exhaustive oxidation with the organic matter in the spent acid, for thermal oxide spent acid processing apparatus, the utility model discloses reduce the disposition of equipment requirement, effectively reduced investment cost and running cost.
Description
Technical field
This utility model is related to a kind of spent acid processing system, especially relates to a kind of regenerative system of acetylene cleaning spent acid.
Background technology
Acetylene is a kind of important basic organic, is usually used in producing vinyl chloride, chemical fibre etc..Industrial, now
Typically raw material production acetylene is made with carbide, trend towards from now on making raw material production acetylene with natural gas and oil.Pure acetylene is colourless
The gas of odorless, the acetylene being generated by carbide is because being often mixed with PH3、H2The impurity such as S and have special unpleasant stink, in commercial Application
Upper needs purify to thick acetylene gas, obtain pure acetylene gas and are applied to commercial production.
Domestic developed concentrated sulphuric acid peace and quiet acetylene gas new technology in recent years, solve in sodium hypochlorite cleaning technique use
Secondary sodium solution amount is big, have the shortcomings that security risk, produce a large amount of brine wastes and carry out three-protection design containing free chlorine in gas, is
One very big technological progress.But in concentrated sulphuric acid peace and quiet acetylene gas new technology in course of industrialization, in actual moving process
Also a lot of difficulties are encountered, the wherein main engineering problem needing to solve has binomial：
1st, acetylene is compared with other class hydrocarbon, and less stable easily resolves into carbon and hydrogen.Release a large amount of when acetylene molecule decomposes
Heat.Concentrated sulphuric acid has strong oxidizing property, and the water absorbing in acetylene gas can release the heat of dilution；Verification experimental verification is when 98% sulphuric acid temperature is 18
DEG C when it is seen that acetylene is decomposed；When 98 sulphuric acid temperature rise to 18 DEG C, the acetylene speed that is decomposed greatly speeds up, solution temperature
Raise rapid.The purification tower internals of PVC material so can be caused, overheated softening transform, quickly forms fault in production quickly.Simultaneously
The flange seal performance of nonmetallic materials is not good, is difficult to ensure a small amount of leakage of card acetylene, due to acetylene during long-term operation
Explosion limit very roomy (2%～80%), so there is very big potential safety hazard.
2nd, purify the Waste Sulfuric Acid darkish complexion of by-product after acetylene, stench, sticky, impurity is many；Substantial amounts of Organic substance is contained in acid solution,
Mainly have：The higher alkynes such as allylene, diacetylene, vinylacetylene, vinyl diacetylene, three alkynes.Also contain：Phosphoric acid,
Acetylene carbon black, elemental sulfur；
From above-mentioned Waste Sulfuric Acid composition it is recognised that this Waste Sulfuric Acid is a complicated mixed solution of composition；Viscosity is high, stimulates
Property is big；The purified treatment such as the Organic substance in solution, acetylene carbon black chemical method, Filtration, absorption method, the way of distillation are respectively provided with limitation
Property it is impossible to the qualified concentrated sulphuric acid of regeneration.Processing method universal at present is using carbide slag neutralization, makes inferior Gypsum Fibrosum
(content of organics severe overweight), this Gypsum Fibrosum also is difficult to sell.So typically doing landfill disposal, with environmental protection policy and law enforcement ring
The development in border, is not meet environmental requirement (to meet chemical industry fixed-end forces in the such landfill disposal of foreseeable future
Requirement).This brings potential policy risk to enterprise.Through rough estimates, often net using concentrated sulfuric acid purification acetylene gas technique
Change acetylene gas needed for one ton of PVC, the Waste Sulfuric Acid 20～25Kg of by-product 80%～85% concentration.Typical 500,000 tons of PVC device second
Alkynes purifies Waste Sulfuric Acid amount (at full capacity, 8000 hour/year) about：10000 tons～12500 tons about；If using carbide slag neutralization
Process, 25000 tons～31000 tons about of solid waste can be produced.Environmental protection pressure to enterprise is huge.
Utility model content
In order to overcome the shortcomings of prior art presence, this utility model provides a kind of regeneration system of acetylene cleaning spent acid
System, can the sulphuric acid that uses to acetylene cleaning operation of direct reuse, decrease the problem of three waste discharge.
A kind of regenerative system of acetylene cleaning spent acid, it includes low-temperature oxidation device and vacuum concentrating apparatus, and described is low
Warm oxidation unit includes dioxygen water measuring tank, oxidizing reactor, diluted acid delivery pump and catalyst filter, oxidizing reactor top
It is provided with dioxygen water inlet and spent acid import, the bottom discharge mouth of dioxygen water measuring tank connects the dioxygen water inlet of oxidizing reactor,
The bottom discharge mouth of oxidizing reactor connects catalyst filter through diluted acid delivery pump.
Preferably, described vacuum concentrating apparatus include diluted acid storage tank, charge pump, dilute sulfuric acid concentration kettle, two-way heat exchanger,
Concentrated sulphuric acid medial launder, cooler, concentrated sulphuric acid storage tank, exhaust gas cooler, vacuum pump set, dilute sulfuric acid concentration kettle top is provided with sulphuric acid and divides
From tower, diluted acid storage tank connects its top feed mouth of sulphuric acid knockout tower successively through charge pump, two-way heat exchanger；The top of sulphuric acid knockout tower
Portion's discharging opening connection exhaust gas cooler, exhaust gas cooler connects vacuum pump set；The bottom discharge mouth of dilute sulfuric acid concentration kettle is through two-way
Heat exchanger connects concentrated sulphuric acid medial launder, and concentrated sulphuric acid medial launder connects cooler through pump, and cooler is communicated to concentrated sulphuric acid storage tank；Diluted acid
Storage tank is connected with catalyst filter.
Preferably, it is provided with multistage enriched chamber in described dilute sulfuric acid concentration kettle, between enriched chambers at different levels, be provided with dividing plate.
This utility model through the sulphuric acid after the completion of concentration, can direct reuse to acetylene cleaning process.
This utility model has following beneficial effects：
1st, this utility model adopts hydrogen peroxide oxidation, reclaims for sour regeneration and creates condition, can be effectively by spent acid
Organic substance carries out exhaustive oxidation, and oxidized spent acid carries out concentration by sulphuric acid vacuum concentration unit, improves to 98% about, can be straight
Connect using to acetylene cleaning process, the renewable reuse of catalyst adding in oxidizing process, overall process no hazardous waste produces；
2nd, with respect to thermal oxide Waste acid treating device, this utility model reduces equipment use requirement, effectively reduces throwing
Money cost and operating cost.
Brief description
Fig. 1 is the structural representation of this utility model low-temperature oxidation device；
Fig. 2 is the structural representation of this utility model vacuum concentrating apparatus.
Specific embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but claimed by this utility model
Scope be not limited to this.
With reference to Fig. 1, a kind of regenerative system of acetylene cleaning spent acid, it includes low-temperature oxidation device and vacuum concentrating apparatus,
Described low-temperature oxidation device includes dioxygen water measuring tank 2, oxidizing reactor 1, diluted acid delivery pump 3 and catalyst filter 4, oxygen
Change reactor 1 top and be provided with dioxygen water inlet and spent acid import, the bottom discharge mouth connection oxidizing reactor of dioxygen water measuring tank 2
1 dioxygen water inlet, the bottom discharge mouth of oxidizing reactor 1 connects catalyst filter 4 through diluted acid delivery pump 3.Shown in Fig. 1
Dioxygen water measuring tank 2 and oxidizing reactor 1 be two sets, share a diluted acid delivery pump 3 and catalyst filter 4.
With reference to Fig. 2, described vacuum concentrating apparatus include diluted acid storage tank 5, charge pump 6, dilute sulfuric acid concentration kettle 8, two-way change
Hot device 9, concentrated sulphuric acid medial launder 10, cooler 11, concentrated sulphuric acid storage tank 14, exhaust gas cooler 12, vacuum pump set 13, dilute sulfuric acid concentrates
Kettle 8 top is provided with sulphuric acid knockout tower 7, and diluted acid storage tank 5 connects the top of sulphuric acid knockout tower 7 successively through charge pump 6, two-way heat exchanger 9
Portion's charging aperture；The top discharge mouth connection exhaust gas cooler 12 of sulphuric acid knockout tower 7, exhaust gas cooler 12 connects vacuum pump set 13；
The bottom discharge mouth of dilute sulfuric acid concentration kettle 8 connects concentrated sulphuric acid medial launder 10 through two-way heat exchanger 9, and concentrated sulphuric acid medial launder 10 is through pump even
Logical cooler 11, cooler 11 is communicated to concentrated sulphuric acid storage tank 14.Diluted acid storage tank 5 is connected with catalyst filter 4.
It is provided with multistage enriched chamber in described dilute sulfuric acid concentration kettle 8, between enriched chambers at different levels, be provided with dividing plate.
Operation principle of the present utility model is：
(1) spent acid (black, COD is 300,000 ppm) of acetylene cleaning is added in oxidizing reactor 1, opens steam valve
Door, is warming up to 80 DEG C；
(2) add catalyst (such as nonmetal oxide carbon base catalyst) in oxidizing reactor 1, stir at 80 DEG C
1.5 hour；
(3) add a certain amount of hydrogen peroxide toward in dioxygen water measuring tank 2, open measuring tank 2 and the connection of oxidizing reactor 1
Valve Deca hydrogen peroxide, hydrogen peroxide dripping quantity is add sulphuric acid weight 0.7, controls the anti-of oxidizing reactor 1 during Deca
Answer temperature at 80 DEG C, and be controlled rate of addition by controlling the foam height in liquid；
(4) completion of dropping, the COD of sampling detection sulphuric acid substrate is less than 500ppm, if unqualified, supplements dual oxide water straight
Extremely qualified；
(5) after qualified, sulphuric acid is squeezed into catalyst filter 4 by diluted acid delivery pump 3, filters out catalyst, through filtering
Sulphuric acid enter diluted acid storage tank 5, catalyst carries out reuse after living again again；Sulphuric acid COD through above-mentioned oxidation processes is down to
400ppm, mass concentration is down to 65%；Oxidation step completes, and this process no other solid wastes produce.
(6) use charge pump 6 to send into sulphuric acid knockout tower 7 top after sulphuric acid measure control, absorb in dilute sulfuric acid concentration kettle 8
Sulfur trioxide, temperature and concentration enter in dilute sulfuric acid concentration kettle 8 after all raising and process；
It is provided with multistage enriched chamber in described dilute sulfuric acid concentration kettle 8, between enriched chambers at different levels, be provided with dividing plate.In high vacuum condition
Under, multiple acid solution explosive evaporations at a lower temperature concentrating interior in dilute sulfuric acid concentration kettle 8, concentration improves step by step, Ge Jinong
The dividing plate of contracting room prevents the backflow of acid solution it is ensured that maximum mean temperature difference between acid solution and heating tube, takes full advantage of tantalum
The heating surface (area) (HS of pipe surface, so that the sulphuric acid that afterbody enriched chamber flows out reaches aimed concn；
(7) mass concentration of sulphuric acid is concentrated into 98% by 65%, goes out dilute sulfuric acid concentration kettle 8 through two-way heat exchanger 9 overflow,
Enter concentrated sulphuric acid medial launder 10, after cooled device 11 cooling, deliver to concentrated sulphuric acid storage tank 14；
(8) steam that sulphuric acid knockout tower 7 top produces enters exhaust gas cooler 12 after 70% sulfuric acid scrubbing and cools down, cooling
Tail gas afterwards enters vacuum pump set 13, and on-condensible gas is discharged through vacuum pump set and sent into tail gas tower purification.Through the sulfur after the completion of concentration
Acid, can direct reuse to acetylene cleaning process.
Claims (3)
1. a kind of regenerative system of acetylene cleaning spent acid it is characterised in that：It includes low-temperature oxidation device and vacuum concentrating apparatus,
Described low-temperature oxidation device includes dioxygen water measuring tank, oxidizing reactor, diluted acid delivery pump and catalyst filter, and oxidation is anti-
Kettle top is answered to be provided with dioxygen water inlet and spent acid import, the bottom discharge mouth of dioxygen water measuring tank connects the dioxygen of oxidizing reactor
Water inlet, the bottom discharge mouth of oxidizing reactor connects catalyst filter through diluted acid delivery pump.
2. acetylene cleaning spent acid according to claim 1 regenerative system it is characterised in that：Described vacuum concentrating apparatus
Including diluted acid storage tank, charge pump, dilute sulfuric acid concentration kettle, two-way heat exchanger, concentrated sulphuric acid medial launder, cooler, concentrated sulphuric acid storage tank, tail
Gas Cooler, vacuum pump set, dilute sulfuric acid concentration kettle top is provided with sulphuric acid knockout tower, diluted acid storage tank successively through charge pump, two-way change
Hot device connects its top feed mouth of sulphuric acid knockout tower；The top discharge mouth connection exhaust gas cooler of sulphuric acid knockout tower, tail gas cools down
Device connects vacuum pump set；The bottom discharge mouth of dilute sulfuric acid concentration kettle connects concentrated sulphuric acid medial launder through two-way heat exchanger, in concentrated sulphuric acid
Between groove connect cooler through pump, cooler is communicated to concentrated sulphuric acid storage tank；Diluted acid storage tank is connected with catalyst filter.
3. acetylene cleaning spent acid according to claim 1 regenerative system it is characterised in that：In described dilute sulfuric acid concentration kettle
It is provided with multistage enriched chamber, between enriched chambers at different levels, be provided with dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620898749.7U CN205953515U (en) | 2016-08-18 | 2016-08-18 | Regeneration system of peace and quiet spent acid of acetylene |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620898749.7U CN205953515U (en) | 2016-08-18 | 2016-08-18 | Regeneration system of peace and quiet spent acid of acetylene |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706557A (en) * | 2018-07-09 | 2018-10-26 | 陕西高科环保科技有限公司 | A kind of sulfur waste acid-restoring plant and its recovery method |
| CN110422827A (en) * | 2019-08-05 | 2019-11-08 | 贵州兰鑫石墨机电设备制造有限公司 | A kind of the Waste Sulfuric Acid recycling device and technique of dry chlorine gas |
| CN114293205A (en) * | 2021-12-17 | 2022-04-08 | 新疆新能源(集团)准东环境发展有限公司 | Device and method for recovering and treating PVC acetylene purification waste sulfuric acid |
-
2016
- 2016-08-18 CN CN201620898749.7U patent/CN205953515U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706557A (en) * | 2018-07-09 | 2018-10-26 | 陕西高科环保科技有限公司 | A kind of sulfur waste acid-restoring plant and its recovery method |
| CN110422827A (en) * | 2019-08-05 | 2019-11-08 | 贵州兰鑫石墨机电设备制造有限公司 | A kind of the Waste Sulfuric Acid recycling device and technique of dry chlorine gas |
| CN114293205A (en) * | 2021-12-17 | 2022-04-08 | 新疆新能源(集团)准东环境发展有限公司 | Device and method for recovering and treating PVC acetylene purification waste sulfuric acid |
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