CN107814368A - The device of dust technology produced by a kind of nitrotoleune Waste Sulfuric Acid using absorption tower processing - Google Patents
The device of dust technology produced by a kind of nitrotoleune Waste Sulfuric Acid using absorption tower processing Download PDFInfo
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- CN107814368A CN107814368A CN201711049420.9A CN201711049420A CN107814368A CN 107814368 A CN107814368 A CN 107814368A CN 201711049420 A CN201711049420 A CN 201711049420A CN 107814368 A CN107814368 A CN 107814368A
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- nitrogen oxide
- absorption tower
- nitrotoleune
- dust technology
- gas compressor
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- 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
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- 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
- C01B21/40—Preparation by absorption of oxides of nitrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses it is a kind of handle nitrotoleune Waste Sulfuric Acid using absorption tower produced by dust technology device, 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, and absorption tower processing nitrotoleune Waste Sulfuric Acid institute is utilized in particular to one kind
Produce the device of dust technology.
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 typically 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；Nitrogen oxide caused by Waste Sulfuric Acid denitration process is condensed
It is sent into nitrogen oxide pressure oxidation nitrogen absorption tower afterwards to absorb, pressure oxidation nitrogen absorption tower typically 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, dust technology concentrate to 50% using inhale
The device of dust technology produced by receiving tower processing nitrotoleune Waste Sulfuric Acid.
The content of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, there is provided one kind utilizes absorption tower processing nitro first
The device of dust technology produced by benzene Waste Sulfuric Acid, 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, the cooler, automatic segregator, is divided 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；The discharge of the first nitrotoleune is respectively equipped with above the automatic segregator, manual separation device
Pipe, the second nitrotoleune discharge pipe；
Nitrogen oxide absorb the bottom of the tower is communicated to the liquid line changed hands between groove, nitrogen oxide gas compressor group by absorbing liquid discharging tube
Line.
Preferably, the cooler discharging opening and automatic segregator charging aperture, automatic segregator discharging opening and manual separation
Device charging aperture, manual separation device discharging opening and change hands groove charging aperture, change hands groove and nitrogen oxide gas compressor group charging aperture passes through liquid
Fluid line connects.
Preferably, in addition to DCS control systems, the first densitometer, the nitrogen oxide pressure are provided with the automatic segregator
Contracting unit discharging opening is provided with the first regulating valve, first densitometer and the first regulation by the liquid line all the way of flash vessel
Valve is connected by DCS control systems；
Further, described change hands in groove is provided with first liquid level gauge, and described change hands is provided between groove and nitrogen oxide gas compressor group
First delivery pump, the first liquid level gauge are connected with the first delivery pump by DCS control systems.
Further, the finished product discharge pipe is provided with the second densitometer, and the nitrogen oxide on nitrogen oxide absorption tower absorbs water pipe
The 3rd regulating valve is provided with, second densitometer is connected with the 3rd regulating valve by DCS control systems.
Further, the absorbing liquid discharging tube is provided with the second regulating valve, and nitrogen oxide absorb the bottom of the tower is provided with the second liquid
Position meter, second regulating valve are connected with second liquid level gauge by DCS control systems.
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.
The control method of the device of dust technology, step are produced by above-mentioned absorption tower processing nitrotoleune Waste Sulfuric Acid：
A. the mass fraction 15%-40% low concentration dust technologies of denitration condenser will be handled from Waste Sulfuric Acid, are cooled,
Control makes it be mixed with 15%-40% low concentration dust technologies from the nitric acid flow of nitrogen oxide gas compressor group mass fraction more than 50%
Afterwards, density is more than nitrotoleune density；
B. gravity settling separation goes out the nitrotoleune to dissociate in mixed nitrate, and the mixed nitrate for separating nitrotoleune is passed through
The nitrogen oxide gas compressor group improves concentration to more than 50%；
C. the nitric acid of concentration more than 50% part obtained and the quality point subsequently from sulfur waste acid treatment denitration condenser
Number 15%-40% low concentrations dust technology carries out step abc and forms circulation technology；Another part is discharged into finished product tank field；
D. caused nitrogen oxide gas merges with nitrogen oxide gas caused by Waste Sulfuric Acid denitration process in system, through the oxygen
Change oxidized nitrogen absorption tower absorption discharge again after nitrogen compressor absorbs；
E. absorb the bottom of the tower absorbing liquid is combined into nitrogen oxide gas compressor group raising concentration with mixed nitrate in step b and arrived
More than 50%.Dust technology concentration in the present invention is mass percent.
Preferably, the mixed nitrate that nitrotoleune was separated in step b enters back into nitrogen oxide gas compressor group through changing hands groove, leads to
Cross and change hands the flow that Liquid level mixed nitrate in groove enters nitrogen oxide gas compressor group.
Preferably, step d obtains flash process in separation process, step c in cooling procedure, step b in step a
Nitrogen oxide gas merge, then with Waste Sulfuric Acid denitration process caused by nitrogen oxide gas merges, through the nitrogen oxide gas compressor absorption
Oxidized nitrogen absorption tower absorbs discharge again afterwards.
Preferably, upper end intakes in the concentrated nitric acid density domination absorption tower exported in step d by nitrogen oxide gas compressor group
Amount.
Preferably, the absorption flow quantity of nitrogen oxide gas compressor group is entered in step e by absorb the bottom of the tower Liquid level.
Preferably, step is：
A. the mass fraction 15%-40% low concentration dust technologies of denitration condenser will be handled from Waste Sulfuric Acid, are cooled,
Control makes it be mixed with 15%-40% low concentration dust technologies from the concentrated nitric acid flow of nitrogen oxide gas compressor group mass fraction more than 50%
After conjunction, density is more than nitrotoleune density；
B. mixed nitrate passes in succession through automatic segregator, manual separation device isolates free nitrotoleune, will separate
The mixed nitrate of nitrotoleune is passed through the nitrogen oxide gas compressor group again through changing hands groove, concentration is improved to more than 50%, wherein logical
Cross and change hands the flow that Liquid level mixed nitrate in groove enters nitrogen oxide gas compressor group；
C. the nitric acid of concentration more than 50% part obtained is with subsequently coming from sulfur waste acid treatment denitration condenser mass fraction
15%-40% low concentrations dust technology carries out step abc and forms circulation technology；Another part is discharged into finished product tank field；
D. nitrogen oxide gas caused by system intercooler and oxidation nitrogen caused by automatic segregator, manual separation device
Caused by body, flash vessel nitrogen oxide gas merge, then with Waste Sulfuric Acid denitration process caused by nitrogen oxide gas merge, through the oxygen
Change oxidized nitrogen absorption tower absorption discharge again after nitrogen compressor set absorbs；The concentrated nitric acid density exported by nitrogen oxide gas compressor group
Control upper end inflow in absorption tower；
E. by its flow of absorb the bottom of the tower absorbing liquid Liquid level, nitrogen oxide is combined into mixed nitrate in step b
Compressor set improves concentration to more than 50%.
Beneficial effects of the present invention are：
1. 15%-40% low concentrations dust technology and the concentrated nitric acid of concentration 50% are mixed into 37%-40% dust technology, 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 into 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,
With it is environment-friendly the advantages of.
4. automaticity 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, more than 50% dust technology for being stablized nitrogen oxide gas compressor group separator.
Brief description of the drawings
Fig. 1 is the schematic diagram of the device of dust technology produced by absorption tower of the present invention handles nitrotoleune Waste Sulfuric Acid
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- first liquid level gauges the first delivery pumps of 15- 16- second
Densitometer 17- row's steam condensate (SC) pipe 18- first gas pipeline 19- second gas pipeline 20- third gas pipelines 21-
4th gas pipeline 22- gas pipelines merge standby connecting tube 2.1- the first nitrotoleune discharge pipes 2.2- second of section 23-
Nitrotoleune discharge pipe 6.1- nitrogen oxide gas compressor 6.2- separator 7.1- nitrogen oxides absorb water pipe 7.2- column plate working solutions
Delivery pipe 7.3- vapor liquid equilibrium pipe 7.4- absorbing liquid discharging tube 7.5- tail gas discharging pipes the second regulating valves of 7.6- 7.7- second
The regulating valves of liquid level gauge 7.8- the 3rd.
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 device of dust technology is to wrap produced by processing nitrotoleune Waste Sulfuric Acid in absorption tower provided by the invention
Include cooler 1, automatic segregator 2, manual separation device 3, flash vessel 4, change hands groove 5, nitrogen oxide gas compressor group 6, nitrogen oxide absorb
Tower 7 and liquid line and gas line；Nitrogen oxide gas compressor group 6 includes preceding latter linked nitrogen oxide gas compressor 6.1 and separation
Device 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, the outlet line of nitrogen oxide gas compressor group 6 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 the inlet line of cooler 1, cooler 1, automatic segregator
2nd, manual separation device 3, the upper end of flash vessel 4 connect 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：The upper right side discharging opening of cooler 1 divides with the lower-left endfeed mouth of automatic segregator 2, automatically
From the lower right side discharging opening of device 2 and the bottom righthand side charging aperture of manual separation device 3, the upper right side discharging opening of manual separation device 3 and change hands on groove 5
Endfeed mouth, change hands the lower right side of groove 5 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 charging aperture is connected by liquid line, and the discharge outlet pipeline of 6 separator of nitrogen oxide gas compressor group 6.2 is divided into the gas-liquid of parallel connection
Two-way, leads to the bottom feed mouth of nitrogen oxide absorption tower 7 through gas line all the way, and another way is separated into the two of parallel connection through liquid line
Road, connected all the way by flash vessel 4 with the discharge outlet liquid line of cooler 1, 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 the nitrotoleune discharge system of separation.The upper right of cooler 1
Bring out material mouth and the liquid line of the lower-left endfeed mouth of automatic segregator 2 is provided with standby connecting tube 23, with the bottom right of automatic segregator 2
Side discharging opening is connected with the liquid line of the bottom righthand side charging aperture of manual separation device 3.Automatic segregator 2, the top point of manual separation device 3
She You not the first nitrotoleune discharge pipe 2.1, the second nitrotoleune discharge pipe 3.1.The bottom of nitrogen oxide absorption tower 7 passes through absorbing liquid
Discharging tube 7.4 is connected to the liquid line changed hands between groove 5, nitrogen oxide gas compressor group 6.
The present apparatus also includes DCS control systems, and the first densitometer 12, nitrogen oxide gas compressor group 6 are provided with automatic segregator 2
Discharging opening is provided with the first regulating valve 13, the first densitometer 12 and the first regulating valve 13 by the liquid line all the way of flash vessel 4
Connected by DCS control systems；Change hands and be provided with first liquid level gauge in groove 5, change hands between groove 5 and nitrogen oxide gas compressor group 10 provided with the
One delivery pump 15, first liquid level gauge are connected with the first delivery pump 15 by DCS control systems, the overhead-liquid pipe of the first delivery pump 15
Road is provided with flowmeter 15.1；Finished product discharge pipe 11 is provided with the second densitometer 16, and the nitrogen oxide on nitrogen oxide absorption tower 7 absorbs water
Pipe 7.1 is provided with the 3rd regulating valve 7.8, and the second densitometer 16 is connected with the 3rd regulating valve 7.8 by DCS control systems.Absorb
Liquid discharging tube 7.4 is provided with the second regulating valve 7.6, and the bottom of nitrogen oxide absorption tower 7 is provided with second liquid level gauge 7.7, the second regulating valve
7.6 are connected with second liquid level gauge 7.7 by DCS control systems.
Gas line includes the first gas pipeline 18 of the top of cooler 1 setting, second that the top of automatic segregator 2 is set
The 4th gas pipeline that gas pipeline 19, the third gas pipeline 20 of the top of manual separation device 3 setting, the top of flash vessel 4 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.It is relatively large in diameter in the present embodiment because gas pipeline merges section 22, therefore can will nitrogen oxide gas compressor group be entered
6 liquid is passed directly into gas pipeline and merges section 22, then enters nitrogen oxide by import gas phase pipe 10 together with nitrogen oxide gas
Compressor set 6, merge section 22 so as to which absorbing liquid discharging tube 7.4 can also be passed directly into gas pipeline；Also can be directly by oxygen to be entered
The liquid for changing nitrogen compressor set 6 enters nitrogen oxide gas compressor group 6 by fluid pipeline.
The column plate outer wall of nitrogen oxide absorption tower 7 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 said apparatus, the control method that dust technology concentrate is handled using absorption tower is concretely comprised the following steps：
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 the mass fraction more than 50% of nitrogen oxide gas compressor group 6, by flash vessel 4 again
Concentrated nitric acid adjusts concentration to 37%-40%, and this concentration is adjusted to DCS control systems using the density that the first densitometer 12 determines as letter
Number, the aperture of the first regulating valve 13 is controlled, adjustment adds the concentrated nitric acid from the mass fraction more than 50% of nitrogen oxide gas compressor group 6
Flow, it is ensured that dust technology density is bigger than nitrotoleune all the time after adjustment, and dust technology is heavy phase.
B. mixed nitrate passes in succession through automatic segregator 2, manual separation device 3 is isolated free nitrotoleune, then flow automatically
Enter to change hands groove 5.The gravitational settling of automatic segregator 2 continuously separates nitrotoleune, manual separation device 3 divides nitrotoleune interval
From, nitrotoleune from the special discharge line at automatic segregator 2, the top of manual separation device 3 (the first nitrotoleune discharge pipe 2.1,
Second nitrotoleune discharge pipe 3.1) give off system.Change hands groove 5 and remain the liquid level no more than highest liquid level 50%, DCS
The liquid level that control system is determined using first liquid level gauge 14 automatically controls the aperture of the first delivery pump 15 as signal, adjusts feed flow,
By unnecessary concentration 37%-40% dust technologies by being sent into the import gas phase of the import of nitrogen oxide gas compressor 6.1 through flowmeter 15.1
Pipe 10, concentration is improved to more than 50% by nitrogen oxide gas compressor group 6.
C. (separation nitrogen oxide gas, avoids charging not to the nitric acid part of concentration more than 50% obtained after flash vessel 4
Surely) continue with subsequently carrying out step abc from sulfur waste acid treatment denitration condenser mass fraction 15%-40% low concentrations dust technology
Form circulation technology；Another part is discharged into finished product tank field.
D. nitrogen oxide gas caused by system intercooler 1 and nitrogen oxide caused by automatic segregator 2, manual separation device 3
Nitrogen oxide gas caused by gas, flash vessel 4 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 merged, 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 the bottom of nitrogen oxide absorption tower 7 after being come out from separator 6.2, with water
Counter-current absorption, produce 30% low concentration dust technology, the dilute nitre of concentration 37%-40% that the first delivery pump 15 conveys through flowmeter 15.1
Acid is mixed into working solution with 30% low concentration dust technology in absorbing liquid discharging tube 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.DCS control systems are with second on finished product discharge pipe 11
The nitric acid density that densitometer 16 detects the outflow of nitrogen oxide gas compressor group 6 is signal, by controlling the aperture of the 3rd regulating valve 7.8, i.e.,
Nitrogen oxide absorbs the inflow of water pipe 7.1 (top of tower of nitrogen oxide absorption tower 7 absorbs water), makes nitrogen oxide gas compressor group separator
6.2 dust technologies of concentration more than 50% stablized.DCS control systems are with the bottom second liquid level gauge 7.7 of nitrogen oxide absorption tower 7
Measure liquid level is signal, and by controlling the aperture of the second regulating valve 7.6, control enters the absorption flow quantity of nitrogen oxide gas compressor group 6,
Avoid the occurrence of flooding.
The technique in driving and parking stage has：
Steam condensate (SC) caused by start-up flows 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, the valve in standby connecting tube 23 is opened, the nitric acid that low concentration dust technology coming expects pipe 8 flows out, is directly entered
Start with manual separation nitrotoleune in flow separator 3.
The dust technology of concentration 50% is noted before driving in groove 5 is changed hands, the concentration regulation as start-up 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 Waste Sulfuric Acid treatment process, it is not necessary to
Newly-increased place is built.
Claims (8)
- A kind of 1. device of dust technology produced by nitrotoleune Waste Sulfuric Acid using absorption tower processing, 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 connect 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)；The automatic segregator (2), manual separation device (3) top is respectively equipped with the first nitrotoleune discharge pipe (2.1), the second nitrotoleune discharge pipe (3.1)；Nitrogen oxide absorption tower (7) bottom is communicated to by absorbing liquid discharging tube (7.4) changes hands groove (5), nitrogen oxide gas compressor group (6) Between liquid line.
- 2. existed as claimed in claim 1 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：Cooler (1) discharging opening and automatic segregator (2) charging aperture, automatic segregator (2) discharging opening and manual separation device (3) charging aperture, manual separation device (3) discharging opening enter with changing hands groove (5) charging aperture, changing hands groove (5) with nitrogen oxide gas compressor group (6) Material mouth is connected by liquid line.
- 3. existed as claimed in claim 1 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：Also include DCS control systems, the first densitometer (12), the nitrogen oxide gas compressor group are provided with the automatic segregator (2) (6) discharging opening is provided with the first regulating valve (13) by the liquid line all the way of flash vessel (4), first densitometer (12) and First regulating valve (13) is connected by DCS control systems.
- 4. existed as claimed in claim 3 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：Described change hands is provided with first liquid level gauge (14) in groove (5), described to change hands between groove (5) and nitrogen oxide gas compressor group (6) provided with the One delivery pump (15), the first liquid level gauge (14) are connected with the first delivery pump (15) by DCS control systems.
- 5. existed as claimed in claim 3 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：The finished product discharge pipe (11) is provided with the second densitometer (16), and the nitrogen oxide of nitrogen oxide absorption tower (7) absorbs water pipe (7.1) the 3rd regulating valve (7.8) is provided with, second densitometer (16) passes through DCS control systems with the 3rd regulating valve (7.8) Connection.
- 6. existed as claimed in claim 3 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：The absorbing liquid discharging tube (7.4) is provided with the second regulating valve (7.6), and nitrogen oxide absorption tower (7) bottom is provided with the second liquid level Count (7.7), second regulating valve (7.6) is connected with second liquid level gauge (7.7) by DCS control systems.
- 7. existed as claimed in claim 1 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：Nitrogen oxide absorption tower (7) the column plate outer wall sets column plate working solution delivery pipe (7.2), the column plate working solution delivery pipe (7.2) connected with manual separation device (3) to the liquid line changed hands between groove (5).
- 8. existed as claimed in claim 1 using the device of dust technology produced by absorption tower processing nitrotoleune Waste Sulfuric Acid, its feature In：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).
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| CN201711049420.9A CN107814368B (en) | 2017-10-31 | 2017-10-31 | Utilize absorption tower to handle device of produced dilute nitric acid of nitrotoluene waste sulfuric acid |
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| CN201711049420.9A CN107814368B (en) | 2017-10-31 | 2017-10-31 | Utilize absorption tower to handle device of produced dilute nitric acid of nitrotoluene waste sulfuric acid |
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| CN102838489A (en) * | 2012-09-19 | 2012-12-26 | 辽宁庆阳特种化工有限公司 | Clean production method and device of dinitrotoluene |
| CN202936335U (en) * | 2012-09-19 | 2013-05-15 | 辽宁庆阳特种化工有限公司 | Cleaner production method and device for dinitrotoluene |
| 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 |
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