CN107902634A - A kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the process units of concentration - Google Patents
A kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the process units of concentration Download PDFInfo
- Publication number
- CN107902634A CN107902634A CN201711045562.8A CN201711045562A CN107902634A CN 107902634 A CN107902634 A CN 107902634A CN 201711045562 A CN201711045562 A CN 201711045562A CN 107902634 A CN107902634 A CN 107902634A
- Authority
- CN
- China
- Prior art keywords
- nitrogen oxide
- dust technology
- concentration
- pipe
- nitrotoleune
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
- C01B21/44—Concentration
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
- C01B21/46—Purification; Separation ; Stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses the process units that a kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves concentration, including cooler, automatic segregator, manual separation device, flash vessel, change hands groove, nitrogen oxide gas compressor group, nitrogen oxide absorption tower；The cooler, automatic segregator, manual separation device, change hands groove, nitrogen oxide gas compressor group is sequentially connected by liquid line, the nitrogen oxide gas compressor group outlet line is divided into two-way, lead to nitrogen oxide absorption tower through gas line all the way, another way continues the two-way for being divided into parallel connection by liquid line, lead to automatic segregator by flash vessel all the way, another way sets finished product discharge pipe.The nitrotoleune separation of present invention low concentration dust technology suitable for sulfur waste acid treatment and concentration improve, and improve the use value of low value dust technology, preferably solve the problems, such as the line balancing of dust technology, improve the economy of sulfur waste acid treatment device.
Description
Technical field
The present invention relates to spent acid concentrate chemical process, in particular to a kind of nitrotoleune sulfur waste acid treatment low concentration dust technology
Micro- cost improves the process units of concentration.
Background technology
At present, relatively advanced sulfur waste acid treatment process is inhaled for the vacuum concentration of Waste Sulfuric Acid and the pressurization of nitrogen oxide in the world
Receive；The condensation dust technology that concentration is 15%-40% is generally produced in the denitration process that Waste Sulfuric Acid is concentrated in vacuo, if Waste Sulfuric Acid is nitre
Base toluene spent acid, then contain largely free nitrotoleune in dust technology；The nitrogen oxide that Waste Sulfuric Acid denitration process produces is condensed
It is sent into nitrogen oxide pressure oxidation nitrogen absorption tower afterwards to absorb, pressure oxidation nitrogen absorption tower generally uses 0.65mPa operating pressures, absorbs
Nitrogen oxide in tail gas concentration of emission≤240mg/m3；Nitrogen oxide absorption tower obtains 50% concentration nitric acid；Dust technology is condensed to be sent into
Dust technology groove and 50% nitric acid obtained from smoke of gunpowder nitrogen oxide absorption tower are mixed into 40% dust technology as finished product dust technology
Use.
Contain largely free nitro compound in dust technology；The density range of dust technology is 1.1kg/L-1.25kg/L,
The density of nitro compound is about 1.19kg/L, and the density of two kinds of materials is very close, it is difficult to realize free nitro compound from
Continuously separated in dust technology；In follow-up nitrification production, a large amount of nitro compounds waste, and merge side reaction and produce.
Therefore, it is necessary to develop it is a kind of free nitro compound is successfully separated, the nitro first of dust technology concentrate to 50%
The micro- cost of benzene sulfur waste acid treatment low concentration dust technology improves the process units of concentration.
The content of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, there is provided a kind of nitrotoleune sulfur waste acid treatment is low
The micro- cost of concentration dust technology improves the process units of concentration.
The technical scheme is that：A kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves concentration
Process units, it is characterised in that：
Including cooler, automatic segregator, manual separation device, flash vessel, change hands groove, nitrogen oxide gas compressor group, nitrogen oxide
Absorption tower；
The cooler, automatic segregator, manual separation device, change hands groove, nitrogen oxide gas compressor group by liquid line according to
Secondary connection, the nitrogen oxide gas compressor group outlet line are divided into two-way, lead to nitrogen oxide absorption tower through gas line all the way, another
The two-way for being divided into parallel connection is continued on road by liquid line, leads to automatic segregator by flash vessel all the way, and another way sets finished product
Discharge pipe；
Low concentration dust technology coming expects pipe is connected in cooler inlet line, and the cooler, automatic segregator, divide manually
Connect and merge through gas line from device, flash vessel upper end, then inlet gas is merged into the nitrogen oxide gas discharge pipe of process upstream
Phase pipe leads to nitrogen oxide gas compressor group.
Preferably, the cooler discharge port and automatic segregator feed inlet, automatic segregator discharge port and manual separation
Device feed inlet, manual separation device discharge port and change hands groove feed inlet, change hands groove and nitrogen oxide gas compressor group feed inlet passes through liquid
Fluid line connects.
Preferably, DCS control systems are further included, the first densitometer, the nitrogen oxide pressure are equipped with the automatic segregator
Contracting unit discharge port is equipped with the first regulating valve by the liquid line all the way of flash vessel, and first densitometer and first are adjusted
Valve is connected by DCS control systems；
Described change hands in groove is equipped with liquid level gauge, and described change hands is equipped with the first delivery pump, institute between groove and nitrogen oxide gas compressor group
Liquid level gauge is stated to be connected by DCS control systems with the first delivery pump；
The finished product discharge pipe is equipped with the second densitometer, and second densitometer and the nitrogen oxide on nitrogen oxide absorption tower are inhaled
Water pipe is received to connect by DCS control systems.
Preferably, the nitrogen oxide absorb the bottom of the tower connects nitrogen oxide gas compressor group feed pipe by absorbing liquid drain pipe
Line.
Preferably, the nitrogen oxide absorption tower column plate outer wall sets column plate working solution delivery pipe, the column plate working solution row
Pipe is put to connect with manual separation device to the liquid line changed hands between groove.
Preferably, the row's steam condensate (SC) pipe for leading to sour water pond is connected with the low concentration dust technology coming expects pipe.
It is above-mentioned free nitro compound is successfully separated, the nitrotoleune sulfur waste acid treatment of dust technology concentrate to 50% it is low dense
The production method that the micro- cost of dust technology improves the process units of concentration is spent, step is：
A. by the mass fraction 15%-40% low concentration dust technologies from Waste Sulfuric Acid processing denitration condenser, cool,
Merge adjustment concentration to 37%-40% with from more than 50% nitric acid of nitrogen oxide gas compressor group mass fraction again；
B. gravity settling separation goes out the nitrotoleune to dissociate in concentration 37%-40% dust technologies, will separate nitrotoleune
37%-40% dust technologies improve concentration to more than 50% through the nitrogen oxide gas compressor group；
C. continue after more than 50% nitric acid of the concentration part flash distillation obtained with subsequently being condensed from sulfur waste acid treatment denitration
Device, the mass fraction 15%-40% low concentrations dust technology through cooling merge adjustment concentration to 37%-40%；Another part
It is discharged into finished product tank field；
D. the nitrogen oxide gas produced in system merges with the nitrogen oxide gas that Waste Sulfuric Acid denitration process produces, through the oxygen
Change oxidized nitrogen absorption tower absorption discharge again after nitrogen compressor absorbs.Dust technology concentration in the present invention is mass percent.
Preferably, by flash process obtains in separation process, step c in cooling procedure, step b in step a nitrogen oxide
Gas merges, then merges with the nitrogen oxide gas that Waste Sulfuric Acid denitration process produces, and is passed through again after nitrogen oxide gas compressor absorption
Nitrogen oxide absorption tower absorbs discharge.
Preferably, dust technology caused by driving and parking separated nitrotoleune with step b in nitrogen oxide absorption tower
37%-40% dust technologies merge, and concentration is improved to more than 50% through the nitrogen oxide gas compressor group.
Preferably, step is：
A. the mass fraction 15%-40% low concentration dust technologies of denitration condenser will be handled from Waste Sulfuric Acid, through cooler
Cool, then with adjusting concentration to 37%-40% from more than 50% concentrated nitric acid of nitrogen oxide gas compressor group mass fraction；
B. concentration 37%-40% dust technologies pass in succession through automatic segregator, manual separation device isolates free nitro first
Benzene, the nitrogen oxide gas compressor group is passed through by the 37%-40% dust technologies for separating nitrotoleune, improve concentration to 50% with
On；
C. more than the 50% nitric acid part of concentration obtained by nitrogen oxide gas compressor group continue after flash vessel with it is follow-up
Merge adjustment concentration from sulfur waste acid treatment denitration condenser, the mass fraction 15%-40% low concentrations dust technology to cool
To 37%-40%, another part is discharged into finished product tank field；
D. the oxidation nitrogen that the nitrogen oxide gas that system intercooler produces is produced with automatic segregator, manual separation device
The nitrogen oxide gas that body, flash vessel produce merges, then merges with the nitrogen oxide gas that Waste Sulfuric Acid denitration process produces, through the oxygen
Change oxidized nitrogen absorption tower absorption discharge again after nitrogen compressor set absorbs.
Beneficial effects of the present invention are：
1. 15%-40% low concentrations dust technology and 50% concentrated nitric acid of concentration are mixed into the dust technology of 37%-40%, it is ensured that
Dust technology density is bigger than nitrotoleune all the time, then by gravity settling separation, solves the nitro that dissociates in 15%-40% dust technologies
The problem of toluene separation is difficult.
2. 15%-40% dust technology concentration is brought up to more than 50%, use value is improved, eliminates nitrogen oxide absorption
Tower driving and parking needs to produce a large amount of 30% low concentration dust technologies, it is necessary to the problems such as longer working time acid filling of flower prepares；Add
The economy of sulfur waste acid treatment device.
After 3. the oxidized nitrogen compressor set of nitrogen oxide, nitrogen oxide absorption tower absorb, tail gas reaches European emission standard discharge,
Have the advantages that environmental-friendly.
4. the degree of automation is high, pass through the dilute nitre finished acid Density Detection signal of nitrogen oxide gas compressor group 50%, adjustment oxidation
Nitrogen absorbing tower apical sink water, makes nitrogen oxide gas compressor group separator obtain more than 50% dust technology of stabilization.
Brief description of the drawings
Fig. 1 is the schematic diagram for the process units that the micro- cost of nitrotoleune sulfur waste acid treatment dust technology of the present invention improves concentration
Wherein：1- cooler 2- automatic segregator 3- manual separation device 4- flash vessels 5- changes hands groove 6- nitrogen oxide pressures
Contracting unit 7- nitrogen oxides absorption tower 8- low concentration dust technology coming expects pipe 9- nitrogen oxide gas discharge pipe 10- import gas phase pipes
11- finished product discharge pipe 12- the first densitometer 13- the first regulating valve 14- liquid level gauges 15- the first delivery pump the second density of 16-
Count 17- row's steam condensate (SC) pipe 18- first gas pipeline 19- second gas pipeline 20- third gas pipelines 21- the 4th
Gas pipeline 22- gas pipelines merge the spare connecting tube 6.1- nitrogen oxide gas compressors 6.2- separators 7.1- oxidations of section 23-
Nitrogen absorbs water pipe 7.2- column plate working solution delivery pipe 7.3- vapor liquid equilibrium pipe 7.4- absorbing liquid drain pipe 7.5- exhaust emissions
Pipe.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology provided by the invention improves concentration
Process units is, including cooler 1, automatic segregator 2, manual separation device 3, flash vessel 4, changes hands groove 5, nitrogen oxide gas compressor group
6th, nitrogen oxide absorption tower 7 and liquid line and gas line；Nitrogen oxide gas compressor group 6 includes preceding latter linked nitrogen oxide compression
Machine 6.1 and separator 6.2.
Cooler 1, automatic segregator 2, manual separation device 3, change hands groove 5, nitrogen oxide gas compressor group 6 by liquid line according to
Secondary connection, 6 outlet line of nitrogen oxide gas compressor group are divided into the two-way of parallel connection, lead to nitrogen oxide absorption tower 7 through gas line all the way,
Another way continues the two-way for being divided into parallel connection by liquid line, leads to automatic segregator 2 by flash vessel 4 all the way, another way is set
It is set to product discharge pipe 11；Low concentration dust technology coming expects pipe 8 is connected in 1 inlet line of cooler, cooler 1, automatic segregator
2nd, manual separation device 3,4 upper end of flash vessel are connected through gas line merges, then is closed with the nitrogen oxide gas discharge pipe 9 of process upstream
And lead to nitrogen oxide gas compressor group 6 into import gas phase pipe 10.
It is specially in the present embodiment：1 upper right side discharge port of cooler divides with 2 lower-left endfeed mouth of automatic segregator, automatically
From 2 lower right side discharge port of device and 3 bottom righthand side feed inlet of manual separation device, 3 upper right side discharge port of manual separation device and change hands on groove 5
Endfeed mouth, change hands 5 lower right side of groove and the left side of the first delivery pump 15, the top of the first delivery pump 15 and the left side of nitrogen oxide gas compressor group 6
Side feed inlet is connected by liquid line, and 6 separator of nitrogen oxide gas compressor group, 6.2 discharge outlet pipeline is divided into the gas-liquid of parallel connection
Two-way, leads to 7 bottom feed inlet of nitrogen oxide absorption tower through gas line all the way, and another way is separated into the two of parallel connection through liquid line
Road, connects by flash vessel 4 with 1 discharge outlet liquid line of cooler all the way, and another way sets finished product discharge pipe 11.Automatic point
It is additionally provided with from device 2, the top of manual separation device 3 by the special discharge line of separated nitrotoleune discharge system.1 upper right of cooler
Bring out material mouth and the liquid line of 2 lower-left endfeed mouth of automatic segregator is equipped with spare connecting tube 23, with 2 bottom right of automatic segregator
Side discharge port is connected with the liquid line of 3 bottom righthand side feed inlet of manual separation device.
Present apparatus system further includes DCS control systems, and the first densitometer 12, nitrogen oxide compression are equipped with automatic segregator 2
6 discharge port of unit is equipped with the first regulating valve 13 by the liquid line all the way of flash vessel 4, and the first densitometer 12 and first is adjusted
Valve 13 is connected by DCS control systems；Change hands and be equipped with liquid level gauge in groove 5, change hands between groove 5 and nitrogen oxide gas compressor group 10 equipped with the
One delivery pump 15, liquid level gauge are connected with the first delivery pump 15 by DCS control systems, on 15 overhead-liquid pipeline of the first delivery pump
Equipped with flowmeter 15.1；Finished product discharge pipe 11 is equipped with the second densitometer 16, the second densitometer 16 and the oxygen on nitrogen oxide absorption tower 7
Change nitrogen absorption water pipe 7.1 to connect by DCS control systems.
Gas line includes the first gas pipeline 18 of 1 top of cooler setting, second that 2 top of automatic segregator is set
The 4th gas pipeline that gas pipeline 19, the third gas pipeline 20 of 3 top of manual separation device setting, 4 top of flash vessel are set
21, first gas pipeline 18, second gas pipeline 19, third gas pipeline 20, the connection merging of the 4th gas pipeline 21 form gas
Body pipeline merges section 22, and gas pipeline merges section 22 and nitrogen oxide gas discharge pipe 9 is merged into import gas phase pipe 10 and leads to oxidation
Nitrogen compressor set 6.7 bottom of nitrogen oxide absorption tower is connected to gas pipeline by absorbing liquid drain pipe 7.4 and merges section 22.This implementation
It is relatively large in diameter in example because gas pipeline merges section 22, therefore the liquid of nitrogen oxide gas compressor group 6 to be entered can be passed directly into gas
Body pipeline merges section 22, then enters nitrogen oxide gas compressor group 6 by import gas phase pipe 10 together with nitrogen oxide gas；Also can be direct
The liquid of nitrogen oxide gas compressor group 6 to be entered is entered into nitrogen oxide gas compressor group 6 by fluid pipeline.
7 column plate outer wall of nitrogen oxide absorption tower sets column plate working solution delivery pipe 7.2, column plate working solution delivery pipe 7.2 and hand
Flow separator 3 to the liquid line changed hands between groove 5 connects.The row's steaming for leading to sour water pond is connected with low concentration dust technology coming expects pipe 8
Vapour condensate pipe 17.Nitrogen oxide absorption tower bubble cap plate cancels column plate discharge orifice, it is ensured that the tower in the case of any amount of water
Plate keeps full liquid level；The vapor liquid equilibrium pipe 7.3 at the top of nitrogen oxide absorption tower 7 ensures that nitrogen oxide absorption tower is surprisingly let out in certain layer of column plate
Full tower occurs without liquid flooding in the case of leakage, it is ensured that nitrogen oxide absorption tower continuous-stable works.Tail gas is set at the top of nitrogen oxide absorption tower
Delivery pipe 7.5.
By above device system, the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the method tool of concentration
Body step is：
A. by the mass fraction 15%-40% low concentration dust technologies from low concentration dust technology coming expects pipe 8, through cooler 1
Heat transfer is cooled to 20 DEG C, promotes the solubility of dust technology para-nitrotoluene to decline.Mass fraction 15%-40% after cooling is low
Concentration dust technology separates nitrogen oxide gas with from 6 mass fraction more than 50% of nitrogen oxide gas compressor group, by flash vessel 4 again
Concentrated nitric acid adjusts concentration to 37%-40%, and the adjustment of this concentration is specially the density that DCS control systems are measured with the first densitometer 12
For signal, automatically adjusted by the first regulating valve 13 and add the dense nitre from 6 mass fraction more than 50% of nitrogen oxide gas compressor group
Acid, it is ensured that dust technology density is bigger than nitrotoleune all the time after adjustment, and dust technology is heavy phase.
B. concentration 37%-40% dust technologies pass in succession through automatic segregator 2, manual separation device 3 isolates free nitro
Toluene, then change hands groove 5 from flowing into.2 gravitational settling of automatic segregator continuously separates nitrotoleune, manual separation device 3 is by nitro
Toluene interval separates, and the special discharge line at nitrotoleune from automatic segregator 2, the top of manual separation device 3 gives off system.Turn
Hand groove 5 remains the liquid level no more than highest liquid level 50%, the liquid level that DCS control systems are measured using liquid level gauge 14 as signal,
The first delivery pump 15 is automatically controlled to compress unnecessary concentration 37%-40% dust technologies by being sent into nitrogen oxide through flowmeter 15.1
The import gas phase pipe 10 of 6.1 import of machine, concentration is improved to more than 50% by nitrogen oxide gas compressor group 6.DCS control systems with into
The nitric acid density of 6 outflow of the second densitometer 16 detection nitrogen oxide gas compressor group on product discharge pipe 11 is signal, by controlling oxygen
Change 7 top of tower of nitrogen absorption tower and absorb water, is i.e. nitrogen oxide absorbs 7.1 inflow of water pipe, makes nitrogen oxide gas compressor group separator 6.2
Obtain stable more than 50% dust technology of concentration.
C. by more than the 50% concentrated nitric acid part of concentration that nitrogen oxide gas compressor group 6 obtains, through flash vessel 4, (separation aoxidizes
Nitrogen, avoids charging shakiness), the fluid pipeline between 2 feed inlet of 1 discharge port of cooler and automatic segregator；Continue with
Subsequently from sulfur waste acid treatment denitration condenser, the mass fraction 15%-40% low concentration dust technologies to cool through cooler 1
Mixed adjustment concentration to 37%-40%, more than 50% nitric acid of another part passes through 11 row of finished product discharge pipe through the second densitometer 16
Go out to enter finished product tank field.
D. the nitrogen oxide that the nitrogen oxide gas that system intercooler 1 produces is produced with automatic segregator 2, manual separation device 3
Gas, flash vessel 4 produce nitrogen oxide gas gas pipeline merge section 22 in merge, then with oxidized nitrogen discharge pipe 9
The Waste Sulfuric Acid denitration process of discharge produces nitrogen oxide gas and merges, and entering nitrogen oxide gas compressor group 6 through import gas phase pipe 10 absorbs,
6 unabsorbed nitrogen oxide gas of nitrogen oxide gas compressor group is passed through 7 bottom of nitrogen oxide absorption tower after being come out from separator 6.2, with water
Counter-current absorption, produces 30% low concentration dust technology, the dilute nitre of concentration 37%-40% that the first delivery pump 15 is conveyed through flowmeter 15.1
Acid is mixed into working solution with 30% low concentration dust technology in absorbing liquid drain pipe 7.4 and adds nitrogen oxide gas compressor group 6；Tail gas reaches
European emission standard discharges, and is discharged from the tail gas discharging pipe 7.5 at top；
The technique in driving and parking stage has：
The steam condensate (SC) that start-up produces is flowed out from low concentration dust technology coming expects pipe 8, by arranging steam condensate (SC) pipe
17 are discharged into acid waste water system i.e. sour water pond, and valve on steam condensate (SC) pipe 17 is arranged under system normal operation and is closed.
It is first drive or overhaul after start-up, it is relatively low to come from the dust technology concentration of separator 6.2, dilute without adjusting
The function of concentration of nitric acid, opens the valve in spare connecting tube 23, the nitric acid that low concentration dust technology coming expects pipe 8 flows out, directly into
Start with manual separation nitrotoleune in flow separator 3.
50% dust technology of concentration is noted before driving in groove 5 is changed hands, the concentration as start-up, which is adjusted, starts acid.
Delivery pump 15 is two, and one opens one standby, when production failure of pump, starts stand-by pump immediately, can fully ensure that system
Consecutive production.This method newly added equipment is few, formerly has nitrogen oxide to absorb and is arranged between sulfur waste acid treatment process, it is not necessary to
Newly-increased place is built.
Claims (6)
1. a kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the device of concentration, it is characterised in that：
Including cooler (1), automatic segregator (2), manual separation device (3), flash vessel (4), change hands groove (5), nitrogen oxide compression
Unit (6), nitrogen oxide absorption tower (7)；
The cooler (1), automatic segregator (2), manual separation device (3), change hands groove (5), nitrogen oxide gas compressor group (6) passes through
Liquid line is sequentially connected, and nitrogen oxide gas compressor group (6) outlet line is divided into two-way, leads to oxidation through gas line all the way
Nitrogen absorption tower (7), another way are continued the two-way for being divided into parallel connection by liquid line, lead to automatic point by flash vessel (4) all the way
From device (2), another way sets finished product discharge pipe (11)；
Low concentration dust technology coming expects pipe (8) is connected in cooler (1) inlet line, the cooler (1), automatic segregator
(2), manual separation device (3), flash vessel (4) upper end are connected through gas line merges, then is arranged with the nitrogen oxide gas of process upstream
Outlet pipe (9) is merged into import gas phase pipe (10) and leads to nitrogen oxide gas compressor group (6).
2. the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology as claimed in claim 1 improves the device of concentration, it is special
Sign is：Cooler (1) discharge port and automatic segregator (2) feed inlet, automatic segregator (2) discharge port and manual separation
Device (3) feed inlet, manual separation device (3) discharge port and change hands groove (5) feed inlet, change hands groove (5) and nitrogen oxide gas compressor group (6)
Feed inlet is connected by liquid line.
3. the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology as claimed in claim 1 improves the device of concentration, it is special
Sign is：DCS control systems are further included, the first densitometer (12), the nitrogen oxide compression are equipped with the automatic segregator (2)
Unit (6) discharge port is equipped with the first regulating valve (13), first densitometer by the liquid line all the way of flash vessel (4)
(12) it is connected with the first regulating valve (13) by DCS control systems；
Described change hands is equipped with liquid level gauge (14) in groove (5), described change hands is equipped with first between groove (5) and nitrogen oxide gas compressor group (6)
Delivery pump (15), the liquid level gauge (14) are connected with the first delivery pump (15) by DCS control systems；
The finished product discharge pipe (11) is equipped with the second densitometer (16), second densitometer (16) and nitrogen oxide absorption tower
(7) nitrogen oxide absorbs water pipe (7.1) and is connected by DCS control systems.
4. the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology as claimed in claim 1 improves the device of concentration, it is special
Sign is：Nitrogen oxide absorption tower (7) bottom connects nitrogen oxide gas compressor group (6) import by absorbing liquid drain pipe (7.4)
Pipeline.
5. the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology as claimed in claim 1 improves the device of concentration, it is special
Sign is：Nitrogen oxide absorption tower (7) the column plate outer wall sets column plate working solution delivery pipe (7.2), the column plate working solution row
Pipe (7.2) is put to connect with manual separation device (3) to the liquid line changed hands between groove (5).
6. the micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology as claimed in claim 1 improves the device of concentration, it is special
Sign is：The row's steam condensate (SC) pipe (17) for leading to sour water pond is connected with low concentration dust technology coming expects pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045562.8A CN107902634B (en) | 2017-10-31 | 2017-10-31 | Little cost-raising concentration production device for treating low-concentration dilute nitric acid by nitrotoluene waste sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045562.8A CN107902634B (en) | 2017-10-31 | 2017-10-31 | Little cost-raising concentration production device for treating low-concentration dilute nitric acid by nitrotoluene waste sulfuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107902634A true CN107902634A (en) | 2018-04-13 |
| CN107902634B CN107902634B (en) | 2020-08-04 |
Family
ID=61842077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711045562.8A Active CN107902634B (en) | 2017-10-31 | 2017-10-31 | Little cost-raising concentration production device for treating low-concentration dilute nitric acid by nitrotoluene waste sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107902634B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145893A (en) * | 1995-04-04 | 1997-03-26 | 约瑟夫迈斯纳有限公司 | Rocovery of nitric acid from nitration processes |
| CN1951802A (en) * | 2005-10-18 | 2007-04-25 | 约瑟夫·迈斯纳两合公司 | Recovery of the nitration acid mixtures from nitration processes |
| DE102006013579B3 (en) * | 2006-03-22 | 2007-08-23 | Plinke Gmbh | Reducing the waste water quantity during dinitrotoluene production, and optimizing the waste water quality comprises stripping the waste acid and pre-purified waste acid, saturating the sulfuric acid and purifying the nitrous gases |
| CN102639451A (en) * | 2009-12-01 | 2012-08-15 | 哈凯姆斯凡恩化学公司 | Method for treating wastewater produced during the manufacture of nitro compounds |
| CN102648152A (en) * | 2009-09-15 | 2012-08-22 | 德地氏加工系统有限公司 | Method and plant for reprocessing waste sulphuric acids from nitriding processes |
| CN104016317A (en) * | 2014-06-18 | 2014-09-03 | 天脊煤化工集团股份有限公司 | Method and device for preparing high-concentration dilute nitric acid |
-
2017
- 2017-10-31 CN CN201711045562.8A patent/CN107902634B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145893A (en) * | 1995-04-04 | 1997-03-26 | 约瑟夫迈斯纳有限公司 | Rocovery of nitric acid from nitration processes |
| CN1951802A (en) * | 2005-10-18 | 2007-04-25 | 约瑟夫·迈斯纳两合公司 | Recovery of the nitration acid mixtures from nitration processes |
| DE102006013579B3 (en) * | 2006-03-22 | 2007-08-23 | Plinke Gmbh | Reducing the waste water quantity during dinitrotoluene production, and optimizing the waste water quality comprises stripping the waste acid and pre-purified waste acid, saturating the sulfuric acid and purifying the nitrous gases |
| CN102648152A (en) * | 2009-09-15 | 2012-08-22 | 德地氏加工系统有限公司 | Method and plant for reprocessing waste sulphuric acids from nitriding processes |
| CN102639451A (en) * | 2009-12-01 | 2012-08-15 | 哈凯姆斯凡恩化学公司 | Method for treating wastewater produced during the manufacture of nitro compounds |
| CN104016317A (en) * | 2014-06-18 | 2014-09-03 | 天脊煤化工集团股份有限公司 | Method and device for preparing high-concentration dilute nitric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107902634B (en) | 2020-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107814365A (en) | A kind of juice circulation method of dust technology produced by processing nitrotoleune Waste Sulfuric Acid | |
| CN107758665A (en) | Device and method for purifying food-grade carbon dioxide | |
| CN209685646U (en) | A kind of production system refining cyclohexanone | |
| CN112499710B (en) | Device and method for purifying ammonia water by using ammonia-containing wastewater | |
| CN107892285A (en) | A kind of method of dust technology produced by nitrotoleune Waste Sulfuric Acid using absorption tower processing | |
| CN107814367A (en) | A kind of concentrating method of nitrotoleune sulfur waste acid treatment low concentration dust technology | |
| CN107902634A (en) | A kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the process units of concentration | |
| CN107814366A (en) | A kind of micro- cost of nitrotoleune sulfur waste acid treatment low concentration dust technology improves the production method of concentration | |
| CN107879320A (en) | The juice circulation device of dust technology produced by a kind of processing nitrotoleune Waste Sulfuric Acid | |
| CN218357432U (en) | Secondary rectification and purification device for propylene glycol | |
| CN107986250A (en) | A kind of concentration unit of nitrotoleune sulfur waste acid treatment low concentration dust technology | |
| CN111644019A (en) | Production method of nitrogen oxide gas full-automatic pressure absorption process | |
| CN107814368A (en) | The device of dust technology produced by a kind of nitrotoleune Waste Sulfuric Acid using absorption tower processing | |
| CN216777948U (en) | Intermittent purification device for propylene glycol methyl ether | |
| CN113233434B (en) | Production process and production device of electronic-grade nitric acid | |
| CN216259148U (en) | System for producing electronic-grade hydrogen peroxide water solution | |
| CN108217615A (en) | The device of dust technology removal nitrotoleune after nitrotoleune spent acid denitration | |
| CN208756997U (en) | Urea distillation system and urea preparation system | |
| CN107986249A (en) | The method that dust technology removes nitrotoleune after nitrotoleune spent acid denitration | |
| CN201648015U (en) | Device for preparing high-purity ruthenium hydrochloric acid solution | |
| CN107935042A (en) | One kind is used to remove VOCl3Middle TiCl4System and method | |
| CN106744747B (en) | The production method of dust technology and the production equipment of dust technology | |
| CN205973794U (en) | Oxidation unit of anthraquinone process production hydrogen peroxide solution | |
| CN108516968A (en) | It is a kind of recycling dioxolane reboiling tower bottom material device and technological process | |
| CN110589766A (en) | Refined hydrogen recovery device for PTA production process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |