CN205340497U - Resourceful treatment system of sour production tail gas of H - Google Patents
Resourceful treatment system of sour production tail gas of H Download PDFInfo
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- CN205340497U CN205340497U CN201620041936.3U CN201620041936U CN205340497U CN 205340497 U CN205340497 U CN 205340497U CN 201620041936 U CN201620041936 U CN 201620041936U CN 205340497 U CN205340497 U CN 205340497U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a sour process gas 's of H resourceful treatment system, include to have NOx gas feed's NOx absorbing device I, and have SO2 gas feed's SO2 absorbing device II. Denitration waste gas in the sour production process of H and acid out waste gas is through the processing of this processing system, not only can discharge to reach standard, and can also output inorganic salts and the higher diazotization reagent of industrial value - - - nitrosyl sulphuric acid. Processing system be the sour process gas 's of a H integrated processing system, utilize this processing system, can make cleaner, the low price of the sour production technology of H, be suitable for industrial enterprise's production application.
Description
Technical field
This utility model relates to H-acid synthesis field and treating tail gas field, particularly relates to a kind of H-acid and produces the recycling treatment system of tail gas, belongs to cleaning and produces and environmental protection application technology category.
Background technology
H-acid is a kind of important chemical intermediate, mainly for the production of activity, acidity and direct dyes etc..As, Reactive dye red M-3BE, Reactive Brilliant Red K-2BP, acid fuchsin 6b, acid red G, Acid Black 10B, directly black etc. more than 90 plant products.
Current domestic H-acid prevailing technology: with refined naphthalene for raw material, by sulfonation-nitrated-neutralization-reduction-T acid isolation-alkali fusion-H-acid acid out, obtains H-acid list sodium salt.
H-acid denitrification process can produce substantial amounts of oxides of nitrogen gas, and H-acid acid out process can produce substantial amounts of sulfur dioxide gas, at present these two strands of gases is mainly adopted absorbing by liquid caustic soda, and nitrogen oxides produces sodium nitrate and sodium nitrite salt-mixture waste water after absorbing；Sulfur dioxide produces sodium sulfite salt waste water after alkali liquor absorption.The sodium sulfite reclaimed can be used for the production of lignin, and nitric acid sodium salt and nitrous acid sodium salt waste water are currently without good processing mode.
Application number is a kind of method that disclosed in the invention of 201410264027.1, H-acid denitration exhaust-gas resource utilizes, and absorbs denitration tail gas with water.The dust technology obtained and 98% nitric acid are hybridly prepared into the nitric acid of 60～95% and do the nitrating agent of H-acid；The tail gas obtained high altitude discharge after alkali liquor absorption.This method is studied just for denitration tail gas, the nitric acid obtained can reuse, but economic worth is not high.Simultaneously, it is necessary to additionally design set of device processes SO 2 tail gas, adds the cost that H-acid produces.
Summary of the invention
In order to overcome drawbacks described above of the prior art, the processes such as the denitration waste gas in H-acid production process, isolation are produced waste gas comprehensive utilization by this utility model, synthesize nitrosyl sulfuric acid.
A kind of H-acid produces the recycling treatment system of tail gas, it is characterised in that include the NOx absorption plant I with NOx gas feed, and with SO2The SO of gas feed2Absorption plant II.
Denitration waste gas is through NOx absorption plant I, and the absorption liquid I obtained enters SO2Absorption plant II, passes into acid out waste gas equipped with the SO absorbing liquid I2In absorption plant II, be absorbed liquid II, i.e. finished product nitrosyl sulfuric acid.Denitration waste gas and acid out waste gas are by process device described in the utility model, not only by waste gas pollution control and treatment to qualified discharge, also produce the nitrosyl sulfuric acid product of high-quality, make the production technology of H-acid more clean inexpensively.
Denitrating technique needs pyroreaction, so the EGT produced is higher, is passed directly in absorption liquid, can will absorb liquid heating, cause the nitrosyl sulfuric acid decomposes generated, come back in gas phase.So, as preferably, process system described in the utility model also includes pretreatment unit, and described pretreatment unit includes the condenser with NOx gas feed and gas-liquid separator.Denitration tail gas sloughs condensed fluid by gas-liquid separator after cooling down within the condenser, and the gas obtained enters NOx absorption plant I.
The gaseous phase outlet of gas-liquid separator is connected by pipeline with the gas phase import of NOx absorption plant I, the liquid-phase outlet of gas-liquid separator and SO2The import of absorption plant II is connected.
As preferably, process system described in the utility model also includes after-treatment device III, and described after-treatment device III includes the alkali liquor absorption device with inlet exhaust gas and the water absorption plant being connected with alkali liquor absorption device.
As preferably, NOx absorption plant I of the present utility model and after-treatment device III include the multistage absorption device being sequentially connected in series respectively；SO2Absorption plant II includes multistage absorption device in parallel or series successively.Absorption plant can be absorption tower and/or still and/or groove.
As preferably, NOx absorption plant includes the A level NOx absorption cell being sequentially connected in series, A >=1.Every grade of absorption cell is designed with inner loop pipeline；Every grade of absorption cell top all has gas feed and gas outlet, and the gas outlet of A level absorption cell is connected by pipeline with the gas feed of after-treatment device III；The sidepiece of every grade of absorption cell all has liquid outlet, the liquid outlet of the 1st grade of absorption cell sidepiece and SO2The liquid-inlet of absorption plant II is connected；A level absorption cell is provided with the import of fresh absorption liquid；The sidepiece of the 1st ~ (A-1) level absorption cell has liquid-inlet.
It is preferred that, above-mentioned A=3.
As preferably, SO2Absorption plant II includes B level absorption kettle in parallel successively, B >=1.Every grade of SO2Circulation line it is designed with in absorption kettle；Every grade of absorption kettle top all has gas feed and gas outlet, and gas outlet is connected by pipeline with the gas feed of after-treatment device III；1st grade of SO2Absorption kettle sidepiece is provided with sulphuric acid or nitric acid import；Every grade of SO2Having liquid outlet bottom absorption kettle, liquid outlet is connected with the import of finished product transfer tank；Every grade of SO2Pipeline communication is passed through bottom absorption kettle.
It is preferred that, above-mentioned B=2.
As preferably, after-treatment device III includes the C level alkali liquor absorption tower and the D level water scrubber that are sequentially connected in series.The sidepiece of alkali liquor absorption tower and water scrubber has inlet exhaust gas and offgas outlet, and bottom has liquid-inlet and liquid outlet.
Further preferably, C=2, D=1.
The liquid-inlet of 3rd level NOx absorption cell flows into fresh concentrated sulphuric acid or oleum as absorbing liquid；SO2The sidepiece on absorption tower has adjuvant charging aperture；The absorption liquid of alkali liquor absorption tower is akaline liquid, and the absorption liquid of water scrubber is neutral liquid, and the gas outlet of water scrubber connects with upper atmosphere.
System described in the utility model can be run in the following manner:
(1) denitration tail gas is after condenser, enters gas-liquid separator, and condensed fluid flows out from the liquid-phase outlet of condenser and gas-liquid separator, flows into SO by pipeline2Absorption kettle；NOx gas flows out from the gaseous phase outlet of gas-liquid separator, flows into first order NOx absorption cell by pipeline and absorbs；
(2) tail gas after the absorption of first order NOx absorption cell flows out from the gas outlet of first order NOx absorption cell, pass sequentially through second level NOx absorption cell and third level NOx absorption cell, the tail gas that the gas outlet of third level NOx absorption cell is flowed out flows into the air inlet of first order alkali liquor absorption tower by pipeline, the tail gas that the gas outlet of first order alkali liquor absorption tower is flowed out passes sequentially through second level alkali liquor absorption tower and water scrubber, the gas outlet of water scrubber and high mouth atmosphere.
(3) the tail gas absorption liquid in step (2) flows into third level NOx absorption cell by the fluid inlet of third level NOx absorption cell, the liquid that the liquid outlet of third level NOx absorption cell flows out passes sequentially through second, one-level NOx absorption cell, and the absorption liquid I up to standard that the liquid outlet of first order NOx absorption cell flows out flows into SO by pipeline2In absorption kettle.
(4) SO is worked as2After having absorption liquid I to flow in absorption kettle, opening acid out gas inlet valve, acid out waste gas enters SO2Absorption kettle carries out two-stage absorption, connects bottom two-stage absorption kettle, makes to absorb liquid concentration in two stills and keeps consistent, detects the absorption liquid concentration in any one still, after reaching standard, absorption liquid up to standard is proceeded to finished product transfer tank.SO2The tail gas that absorption kettle flows out flows into tail gas absorber by pipeline, absorbs.
As preferably, SO2Absorption kettle sidepiece also has adjuvant charging aperture.
As preferably, the liquid-phase outlet of gas-liquid separator is also connected with the import of wastewater treatment equipment.
As preferably, NOx absorption cell and SO2Absorption kettle is provided with temperature controller.
As preferably, process system described in the utility model also includes alkali liquor batching kettle and brine concentration device.
Compared with prior art, this utility model has as follows a little:
(1) process denitration tail gas and acid out waste gas by a set of process system simultaneously, obtain the harmless tail gas that can directly discharge；
(2) utilize denitration waste gas and acid out waste gas to produce nitrosyl sulfuric acid, improve the economy of H-acid exhaust-gas treatment, reduce H-acid cleaning production cost；
(3) value of the product of output is higher.
(4) multistage absorption device series connection, it is ensured that the completeness of exhaust-gas treatment and the utilization rate of waste gas.
Accompanying drawing explanation
Fig. 1 is the recycling treatment system schematic diagram that H-acid of the present utility model produces waste gas.
Detailed description of the invention
As it is shown in figure 1, the system of waste gas comprehensive resource includes pretreatment unit, absorption plant, after-treatment device in a kind of H-acid production process.Pretreatment unit includes the condenser with exhaust gas inlet and exports, with condenser-air, the gas-liquid separation device being connected；Absorption plant includes the NOx absorption plant being connected with condenser, the SO being connected with NOx absorption plant liquid outlet2Absorption plant, SO2Absorption plant is with SO2Air inlet；NOx absorption plant and SO2The gas outlet of absorption plant is connected with the gas feed of after-treatment device.
NOx absorption plant includes 3 grades of absorption cells, and every grade of absorption cell has air inlet, gas outlet, absorption liquid import, absorbs liquid outlet；Every grade of absorption cell is provided with vacuum jet pump, and NOx enters ejector pump blended absorbent with absorbing liquid, and can open 1-3 vacuum jet pump in every grade of absorption cell simultaneously.
SO2Absorption plant includes 2 grades of absorption kettles, and every grade of absorption kettle has air inlet, gas outlet, absorption liquid import, absorbs liquid outlet；Every grade of absorption kettle is provided with vacuum jet pump, SO2Enter ejector pump blended absorbent with absorbing liquid, and every grade of absorption kettle can be opened 1-2 vacuum jet pump simultaneously.
After-treatment device includes 2 grades of Alkali absorption towers being sequentially connected in series and 1 grade of water absorption tower.
It is as follows that system runs operation:
(1) H-acid denitration waste gas enters pretreatment unit, first crosses condenser and is cooled to less than 70 DEG C, enters gas-liquid separator by air inlet 1, separates the liquid obtained after infusion pump, enters SO by No. 26 water inlets2Absorption plant, is separated the gas obtained and flows out gas-liquid separator from No. 2 gas outlets, entered the NOx absorption cell of thtee-stage shiplock by air inlet 3.
(2) in step (1), gas outlet 2 effluent air flows into No. 3 air inlets of 1 grade of NOx absorption cell, No. 4 gas outlets of 1 grade of NOx absorption cell connect No. 8 air inlets of 2 grades of NOx absorption cells, and No. 9 gas outlets of 2 grades of NOx absorption cells connect No. 12 air inlets of 3 grades of NOx absorption cells；No. 14 gas outlets of 3 grades of NOx absorption cells connect No. 19 air inlets of 1 grade of Alkali absorption tower, and No. 13 liquid inlets flow into and absorb molten sulfur acid, and No. 11 liquid outlets connect No. 10 liquid inlets of 2 grades of NOx absorption cells；No. 7 liquid outlets of 2 grades of NOx absorption cells connect No. 6 liquid inlets of 1 grade of NOx absorption cell；No. 5 outlets of 1 grade of NOx absorption cell connect surge tank；Wherein every grade of absorption cell is all equipped with circulating pump and heat exchanger, it is ensured that sulphuric acid fully absorbing NOx.
(3) the semi-finished product sulfuric acid solution stored in surge tank squeezes into the SO of two-stage parallel connection by No. 15/16 entrance2Absorption kettle, two SO2Absorption kettle is by regulating valve connection, and wherein every grade of absorption kettle air inlet is provided with the vacuum jet pump that can simultaneously open 1-2.SO2SO is entered through No. 17/18 air inlet2Absorption kettle, fully reacts in a kettle. with absorbing liquid, and finally qualified nitrosyl sulfuric acid, through No. 20/21 outlet, enters finished product transfer tank from No. 22 entrances.
In above-mentioned process system, NOx absorption plant is provided with on-line detecting system, this detection system and SO2Intake valve is chain, absorbs the sulfur dioxide gas flow of nitric acid content control 17/18 in liquid I by detecting, it is determined whether need to add nitric acid or sulphuric acid.
Respectively at the gas outlet of NOx absorption plant and SO2The gas outlet of absorption plant arranges detection equipment, judges the air inlet of after-treatment device according to testing result.
Process system described in the utility model, is not limited only to system described in embodiment.Equivalence that all structures described according to this utility model design, feature and principle are done or simple change, be all included in protection domain of the present utility model.
Claims (9)
1. the recycling treatment system of a H-acid production tail gas, it is characterised in that include the NOx absorption plant I with NOx gas feed, and with SO2The SO of gas feed2Absorption plant II.
2. a kind of H-acid according to claim 1 produces the recycling treatment system of tail gas, it is characterised in that also including pretreatment unit, described pretreatment unit includes the condenser with NOx gas feed and gas-liquid separator.
3. a kind of H-acid according to claim 1 produces the recycling treatment system of tail gas, it is characterized in that, also including after-treatment device III, described after-treatment device III includes the alkali liquor absorption device with inlet exhaust gas and the water absorption plant being connected with alkali liquor absorption device.
4. a kind of H-acid according to claim 3 produces the recycling treatment system of tail gas, it is characterised in that NOx absorption plant I and after-treatment device III include the multistage absorption device being sequentially connected in series respectively；SO2Absorption plant II includes multistage absorption device in parallel successively.
5. the recycling treatment system of a kind of H-acid according to claim 2 production tail gas, it is characterised in that the gaseous phase outlet of gas-liquid separator is connected by pipeline with the gas phase import of NOx absorption plant I, the liquid-phase outlet of gas-liquid separator and SO2The fluid inlet of absorption plant II is connected.
6. a kind of H-acid according to claim 3 produces the recycling treatment system of tail gas, it is characterised in that NOx absorption plant includes the A level NOx absorption cell being sequentially connected in series, A >=1；Being designed with circulation line in every grade of NOx absorption cell, top all has gas feed and gas outlet, and the gas outlet of A level absorption cell is connected by pipeline with the gas feed of after-treatment device III；The sidepiece of every grade of NOx absorption cell all has liquid outlet, the liquid outlet of the 1st grade of absorption cell sidepiece and SO2The liquid-inlet of absorption plant II is connected；A level absorption cell is provided with the import of fresh absorption liquid；The sidepiece of the 1st ~ (A-1) level absorption cell has liquid-inlet.
7. a kind of H-acid according to claim 6 produces the recycling treatment system of tail gas, it is characterised in that SO2Absorption plant II includes being sequentially connected in series or the B level SO of parallel connection2Absorption kettle, B >=1；Every grade of SO2Absorption kettle is designed with circulation line, and top all has gas feed and gas outlet, and gas outlet is connected by pipeline with the gas feed of after-treatment device III；SO2Absorption kettle sidepiece is provided with sulphuric acid or nitric acid import；Every grade of SO2Having liquid outlet bottom absorption kettle, liquid outlet is connected with the import of finished product transfer tank；Every grade of SO2Pipeline communication is passed through bottom absorption kettle.
8. a kind of H-acid according to claim 7 produces the recycling treatment system of tail gas, it is characterised in that after-treatment device III includes the C level alkali liquor absorption tower and the D level water scrubber that are sequentially connected in series；The sidepiece of alkali liquor absorption tower and water scrubber has inlet exhaust gas and offgas outlet, and bottom has liquid-inlet and liquid outlet.
9. a kind of H-acid according to claim 8 produces the recycling treatment system of tail gas, it is characterised in that A=3, B=2, C=2, D=1；The liquid-inlet of 3rd level NOx absorption cell flows into fresh concentrated sulphuric acid or oleum as absorbing liquid；SO2The sidepiece on absorption tower has adjuvant charging aperture；The absorption liquid of alkali liquor absorption tower is akaline liquid, and the absorption liquid of water scrubber is neutral liquid, and the gas outlet of water scrubber connects with upper atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620041936.3U CN205340497U (en) | 2016-01-16 | 2016-01-16 | Resourceful treatment system of sour production tail gas of H |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620041936.3U CN205340497U (en) | 2016-01-16 | 2016-01-16 | Resourceful treatment system of sour production tail gas of H |
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| CN205340497U true CN205340497U (en) | 2016-06-29 |
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| CN201620041936.3U Active CN205340497U (en) | 2016-01-16 | 2016-01-16 | Resourceful treatment system of sour production tail gas of H |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yunbao Inventor after: Mao Bing Inventor after: Wang Peicheng Inventor after: Xu Leijin Inventor after: Lou Yinchuan Inventor after: Zhang Jing Inventor before: Zhang Yunbao Inventor before: Mao Bing Inventor before: Wang Peicheng Inventor before: Xu Leijin Inventor before: Lou Yinchuan Inventor before: Zhang Jing |
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| COR | Change of bibliographic data |