CN102210939A - Method and device for treating nitrochlorobenzene waste gas - Google Patents
Method and device for treating nitrochlorobenzene waste gas Download PDFInfo
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- CN102210939A CN102210939A CN2011101532736A CN201110153273A CN102210939A CN 102210939 A CN102210939 A CN 102210939A CN 2011101532736 A CN2011101532736 A CN 2011101532736A CN 201110153273 A CN201110153273 A CN 201110153273A CN 102210939 A CN102210939 A CN 102210939A
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Abstract
The invention discloses a method and a device for treating nitrochlorobenzene waste gas. The method is characterized by comprising the following steps of: removing dust particles in discharged drying waste gas by virtue of a dust remover, then removing water vapour carried by the waste gas by condensation, heating the waste gas by virtue of a heater, and using the waste gas as a hot wind source of a drying system; the device comprises a gas gathering system, a cooling system, a spraying purification system, a solid-liquid separation system and a draught system, wherein the systems are sequentially connected by virtue of pipelines; the gas gathering system is composed of multiple draught hoods connected in parallel, the cooling system adopts a fin-type water-cooling heat exchange way, the spraying and purifying system comprises a spraying tower, and the solid-liquid separation system comprises a solid-liquid separation water tank. In the invention, multiple cooling heat exchange methods are combined, nitrochlorobenzene waste gas is effectively treated, the removal rate is higher, and no secondary pollution is produced.
Description
Technical field
The present invention relates to a kind of waste gas pollution control and treatment technology, relate in particular to a kind of method and device of administering nitro-chlorobenzene waste gas.
Background technology
Nitro-chlorobenzene is an important chemical material, is made up of paranitrochlorobenzene, o-nitrochlorobenzene, 3 kinds of isomers of m-chloronitrobenzene, and nitro-chlorobenzene waste gas contains, adjacent, m-chloronitrobenzene steam and sublimate, steam and air.The molten point of pure product paranitrochlorobenzene is 83.5 ℃; The molten point of pure product o-nitrochlorobenzene is 32.5 ℃; The molten point of pure product m-chloronitrobenzene is 46 ℃.The direct discharging of nitro-chlorobenzene waste gas will cause bigger pollution to atmospheric environment, health of operators be caused damage, and influence the living environment of surrounding resident.
The common purification method that adopts of organic exhaust gas has firing method, absorption method, absorption process etc. at present.Adopt firing method to handle nitro-chlorobenzene waste gas, the nitrogen oxide of generation and oxides of chlorine can cause secondary pollution; Nitro-chlorobenzene easily solidifies under the normal temperature, adopts absorption method to handle the very fast covering adsorbent surface of nitro-chlorobenzene, makes it lose adsorption capacity; Absorption process generally adopts ethanol, ether, benzene class as absorbent, and is volatile under this type of absorbent normal temperature, taken away by gas easily and produces new pollution, therefore fails thorough contaminated solution problem.
Summary of the invention
Main purpose of the present invention is: at the characteristics of nitro-chlorobenzene waste gas, provide a kind of method and device that adopts crystallisation by cooling to administer nitro-chlorobenzene waste gas.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
The nitro-chlorobenzene emission-control equipment
A kind of nitro-chlorobenzene emission-control equipment is characterized in that:
Comprise gas gathering system, cooling system, spray cleaning system, solid-liquid separation system, induced draught system; Described system links to each other in order by pipeline;
Described gas gathering system is composed in parallel by many groups suspended hood, and different classes of material waste gas is delivered to herein through offgas duct separately, prevents that tail gas from scurrying mutually; In supplementary set waste gas, suck new wind dilution exhaust gas concentration and can reduce EGT simultaneously, waste gas is carried out precooling;
Described cooling system is one to be equipped with a usefulness, adopts finned water-cooled heat exchange mode, is provided with fin condenser, is provided with steam simultaneously and is close to the road, is used for material and solidifies and block the usefulness of changing the material mediation behind the pipeline; Suspended hood to fin condenser place airduct very easily stops up, and is provided with steam pipe and steam jet in the airduct of suspended hood, to prevent to stop up and dredge pipeline; The finned heat exchanger tube of many rows is housed in the housing of system; Spiral fin coil has heat exchange property efficiently, its heat exchange efficiency height, and windage is little, and bigger heat exchange area can be held back the more nitro-chlorobenzene of catching a cold and sublimating, the processing pressure of reduction follow-up system; In the system chilled water water inlet pipe and chilled water outlet pipe respectively with the steam exhaust pipe and the shared one group of mouth of pipe of steam inlet duct; Tail gas after the cooling system heat exchange enters the spray cleaning system by airduct;
Described spray cleaning system comprises spray column and is connected tubular heat exchanger and water circulating pump with spray column by pipeline; Described spray column is one to be equipped with a usefulness, adopt the form of hollow-spraying-tower, with anti-clogging, circulation fluid shower nozzle and spray pipe arrangement that spray column adopts the two-stage multilayer to arrange, be provided with the mediation hot-water nozzle near the spray column top, below the mediation hot-water nozzle, be provided with wire mesh demister; With dredging hot-water nozzle with the mediation wire mesh demister; The spray circulation fluid needs through the pipe bundle condenser cooling, stops up for reducing heat exchanger as far as possible, and pipe bundle condenser adopts circulation fluid to walk the shell side chilled water and walks the tube side mode.
Described solid-liquid separation system is a plurality of free-standing circulation Separation of Solid and Liquid tanks and the slush pump that links to each other with the Separation of Solid and Liquid tank; Described solid-liquid separation tank is that dual-purpose one is equipped with;
Technique scheme of the present invention can also be further perfect:
As preferably, establish demister after the described spray cleaning system.
As preferably, described induced draught system establish connecting hose into and out of the air port.
As preferably, the spray column and the solid-liquid separation system of described spray cleaning system are arranged apart.
A kind of processing method that adopts the nitro-chlorobenzene emission-control equipment
Its main technique step is:
A) high-temp waste gas at first malleation enter by many groups suspended hood and form gas gathering system; Reduce significant loss and control exhaust gas concentration that the negative pressure exhausting causes; When gas gathering system is collected waste gas is carried out precooling;
B) high-temp waste gas after gas gathering system is collected enters cooling system, and the cooling system coolant temperature remains on below 5 ℃; System is made up of the using and the reserved fin condenser, and part high-melting-point nitro Benzene Chloride attached on the fin, reclaims behind the logical vaporize material after operation a period of time after cooling off;
C) enter the spray cleaning system through the cooled waste gas of cooling system, its flow process is:
Waste gas is lowered the temperature once more at spray column, and the nitro-chlorobenzene in the waste gas is sublimated into solid and captured by spray liquid, and spray liquid is back to the Separation of Solid and Liquid tank from the tower liquid return hole, behind the logical hot water nitro-chlorobenzene that separates is melted the back and brings back to life by the slush pump conveying
The product device reclaims; The used circulation fluid of spray cleaning system cools off by pipe bundle condenser, comprises that by the spray cleaning system circulation fluid shower nozzle and spray pipe arrangement deliver into tower body from the Separation of Solid and Liquid tank by circulating pump;
Liquid-gas ratio in the described spray column is 7:1 ~ 10:1; Gas temperature remains on 0 ℃ ~ 10 ℃;
D) waste gas after the spray cleaning system handles is behind demister, by the induced draught system qualified discharge.
The invention has the beneficial effects as follows:
The present invention is directed to the characteristics of nitro-chlorobenzene waste gas, gather multiple cooling heat transferring method, effectively handled nitro-chlorobenzene waste gas, can reclaim nitro-chlorobenzene and non-secondary pollution fully substantially; Adopt this method to handle nitro-chlorobenzene waste gas, its clearance is higher, and the nitro-chlorobenzene that removes can reclaim fully, is the Perfected process of nitro-chlorobenzene exhaust-gas treatment, is adapted at applying in the high-melting-point organic exhaust gas improvement field.
Description of drawings
Fig. 1 is a kind of handling process schematic diagram of the present invention;
Fig. 2 is that the airduct internal steam pipe of Fig. 1 is arranged and the steam jet scheme of installation;
Fig. 3 is the fin condenser structural representation of Fig. 1;
Fig. 4 is the spray column structural representation of Fig. 1.
Description of reference numerals: 1. gas gathering system, 2. cooling system, 3. spray cleaning system, 4. demister, 5. Separation of Solid and Liquid tank, 6. induced draught system, 7. water circulating pump, 8. tubular heat exchanger, 9. aiutage, 10. slush pump, 11. steam jet, 12. interior steam companion pipe, 13. finned tubes, 14. chilled water water inlet pipes, 15. chilled water outlet pipe, 16. steam exhaust pipe, 17. steam inlet ducts, 18. circulation fluid spray heads, 19. circulation fluid water return outlet, 20. mediation heat water-spraying head, 21. wire mesh demisters, 22. cover flanges connect.
The specific embodiment
Below by embodiment also in conjunction with the accompanying drawings, the technical solution of the utility model is further described in detail.
Nitro-chlorobenzene emission-control equipment as shown in Figure 1 comprises gas gathering system 1, cooling system 2, spray cleaning system 3, solid-liquid separation system, induced draught system 6.Gas gathering system 1 is made up of many groups suspended hood, and different classes of material waste gas is delivered to herein through offgas duct separately, prevents that tail gas from scurrying mutually, and plays when collecting waste gas is carried out precooling.Airduct is equipped with steam jet 11 as shown in Figure 2, and cloth steam pipe 12 in the airduct is used for material and solidifies and block the usefulness of changing the material mediation behind the pipeline; Cooling system 2 is made up of two groups of fin condensers, and one is equipped with a usefulness.Fin condenser is equipped with the finned finned tubes 13 of many rows as shown in Figure 3 in the housing, chilled water water inlet pipe 14 and chilled water outlet pipe 15 respectively with steam exhaust pipe 16 and steam inlet duct 17 shared one group of mouth of pipe; Spray cleaning system 3 comprises water circulating pump 7, tubular heat exchanger 8, two-stage spray column; Wherein spray column as shown in Figure 4, no filler adopts the hollow-spraying-tower form to prevent to stop up in the tower, arranging multiplayer spray head 18 in the tower arranges that near top of tower one deck heat water-spraying 20 is used to dredge wire mesh demister 21, and the end socket of spray column adopts flange to be connected 22 with tower body.The nitro-chlorobenzene that spray captures is trapped in the groove by solid-liquid separation tank 5, waits to run up to the to a certain degree interior nitro-chlorobenzene of back heat fused groove, and with slush pump 10 it is delivered to the washing pot and reclaim; Demister 4 is housed before the induced draught system 6, imports and exports connecting hose all is housed, communicate with aiutage 9 afterwards.
During work, nitro-chlorobenzene waste gas is collected by gas gathering system 1 and simultaneously waste gas is carried out precooling, and gas gathering system is made of many groups suspended hood, sucks new wind dilution exhaust gas concentration and can reduce EGT simultaneously in supplementary set waste gas.Suspended hood very easily stops up to fin condenser place airduct, and airduct inside has interior steam companion pipe 12 to establish steam jet 11 simultaneously in order to prevent to stop up and dredge pipeline.Waste gas enters condenser after collecting lowers the temperature again, has the partial nitro chlorobenzene to meet condensation China and attached on the fin.Cooling system adopts finned water-cooled heat exchange mode, establishes steam by-pass simultaneously.Spiral fin coil has heat exchange property efficiently, its heat exchange efficiency height, and windage is little, and bigger heat exchange area can be held back the more nitro-chlorobenzene of catching a cold and sublimating, the processing pressure of reduction follow-up system.The nitro-chlorobenzene that condenser is held back is too much, and windage increases when influencing system and normally moving, and closes chilled water and opens steam valve, makes condenser pipe cross Steam Heating fusion nitro-chlorobenzene, reaches the purpose of recovery.Gas after cooling enters spray cleaning system 3 and handles, and spray column is established the form that two-stage adopts multilayer circulation fluid spray head 18 hollow-spraying-towers, can prevent when guaranteeing treatment effeciency that tower body from stopping up.The spray circulation fluid needs to stop up for reducing heat exchanger as far as possible through tubular heat exchanger 8 coolings, adopts circulation fluid to walk the shell side chilled water and walks the tube side mode, and waste gas is fully contacted with spray liquid, makes nitro-chlorobenzene and steam thereof be cooled rapidly and solidifies.Because nitro-chlorobenzene solubility in water is very little, just can be crystalline solid state and exist in water, sublimate in the waste gas and dust also can be got off by supplementary set.Circulation fluid behind the spray enters Separation of Solid and Liquid tank 5, and solid material is isolated in the tank, and the water after the separation continues to recycle.Treat that solid material is accumulated to when a certain amount of, switch to standby Separation of Solid and Liquid tank, the material in the former separating tank of heating and melting reclaims nitro-chlorobenzene with the form of liquid.Gas after the final purification is by behind the demister 4, and through induced draught system 6 qualified discharges, processing finishes.
Claims (5)
1. device of administering nitro-chlorobenzene waste gas is characterized in that:
Comprise gas gathering system (1), cooling system (2), spray cleaning system (3), solid-liquid separation system, induced draught system (6); Described system links to each other in order by pipeline;
Described gas gathering system (1) is composed in parallel by many groups suspended hood, is provided with steam pipe and steam jet in the airduct of suspended hood;
Described cooling system (2) adopts finned water-cooled heat exchange mode, is provided with fin condenser, is provided with steam simultaneously and is close to the road; Many row's finned heat exchanger tubes (13) are housed in the system; Chilled water water inlet pipe (14) and chilled water outlet pipe (15) respectively with the steam exhaust pipe (16) and the shared one group of mouth of pipe of steam inlet duct (17); Tail gas after the cooling system heat exchange enters spray cleaning system (3) by airduct;
Described spray cleaning system (3) comprises spray column and is connected tubular heat exchanger (8) and water circulating pump (7) with spray column by pipeline; Described spray column adopts hollow-spraying-tower, in establish circulation fluid shower nozzle (18) and the spray pipe arrangement that multilayer is arranged, be provided with mediation hot-water nozzle (20) near the spray column top, below dredging hot-water nozzle, be provided with wire mesh demister (21);
Described solid-liquid separation system is a plurality of free-standing circulation Separation of Solid and Liquid tanks (5) and the slush pump (10) that links to each other with the Separation of Solid and Liquid tank.
2. according to the device of the described improvement nitro-chlorobenzene of claim 1 waste gas, it is characterized in that: also be provided with demister (4) after the described spray cleaning system (3).
3. according to the device of claim 1 or 2 described improvement nitro-chlorobenzene waste gas, it is characterized in that: described induced draught system (6) establish connecting hose into and out of the air port.
4. according to the device of claim 1 or 2 described improvement nitro-chlorobenzene waste gas, it is characterized in that: the spray column and the solid-liquid separation system of described spray cleaning system (3) are arranged apart.
5. one kind is adopted the processing method of administering the nitro-chlorobenzene exhaust device, and its main technique step is:
A) high-temp waste gas at first malleation enter by many groups suspended hood and form gas gathering system (1); When collecting, waste gas is carried out precooling;
B) high-temp waste gas after gas gathering system (1) is collected enters cooling system (2), and the cooling system coolant temperature remains on below 5 ℃; System is made up of the using and the reserved fin condenser, and part high-melting-point nitro Benzene Chloride attached on the fin, reclaims behind the logical vaporize material after operation a period of time after cooling off;
C) enter spray cleaning system (3) through the cooled waste gas of cooling system (2), its flow process is:
Waste gas is lowered the temperature once more at spray column, nitro-chlorobenzene in the waste gas is sublimated into solid and is captured by spray liquid, spray liquid is back to Separation of Solid and Liquid tank (5) from tower liquid return hole (19), behind the logical hot water nitro-chlorobenzene that separates is melted the back and carries back the production device to reclaim by slush pump (10); The used circulation fluid of spray cleaning system comprises that by the spray cleaning system circulation fluid shower nozzle (18) and spray pipe arrangement deliver into tower body from Separation of Solid and Liquid tank (5) by circulating pump (7) by pipe bundle condenser (8) cooling;
The cooling fluid of described pipe bundle condenser (8) is industrial chilled water, and coolant temperature remains on below 5 ℃;
Liquid-gas ratio in the described spray column is 7:1 ~ 10:1; Gas temperature remains on 0 ℃ ~ 10 ℃;
D) waste gas after spray cleaning system (3) handles is behind demister (4), by induced draught system (6) qualified discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101532736A CN102210939A (en) | 2011-06-09 | 2011-06-09 | Method and device for treating nitrochlorobenzene waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101532736A CN102210939A (en) | 2011-06-09 | 2011-06-09 | Method and device for treating nitrochlorobenzene waste gas |
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| Publication Number | Publication Date |
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| CN102210939A true CN102210939A (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101532736A Pending CN102210939A (en) | 2011-06-09 | 2011-06-09 | Method and device for treating nitrochlorobenzene waste gas |
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| CN (1) | CN102210939A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752126A (en) * | 2014-01-04 | 2014-04-30 | 江苏民生特种设备集团有限公司 | Spraying separator device |
| CN104707430A (en) * | 2015-03-04 | 2015-06-17 | 中国石油化工股份有限公司 | Nitrochlorobenzene waste gas treatment device in tank truck loading process |
| CN107899401A (en) * | 2017-11-27 | 2018-04-13 | 麻城市中优顺建材科技有限公司 | A kind of acrylic factory waste gas treatment process |
| CN111921220A (en) * | 2020-06-22 | 2020-11-13 | 苏州硕冠环境科技有限公司 | Cooling recovery processing method for solid material after gas material is cooled |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500539A (en) * | 2002-08-09 | 2004-06-02 | 月岛机械株式会社 | Collecting facility of high melting point component in gas and collecting facility of dihalogenated aromatic compound in gas |
| CN201384868Y (en) * | 2009-03-25 | 2010-01-20 | 泰州百力化学有限公司 | Isophthalodinitrile watering absorbing and gathering system |
| CN201565153U (en) * | 2009-09-28 | 2010-09-01 | 浙江省常山化工有限责任公司 | Fin type crystallizer for nitrochlorobenzene production |
| CN202128939U (en) * | 2011-06-09 | 2012-02-01 | 浙江省环境工程有限公司 | Device for treating nitrochlorobenzene waste gas |
-
2011
- 2011-06-09 CN CN2011101532736A patent/CN102210939A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500539A (en) * | 2002-08-09 | 2004-06-02 | 月岛机械株式会社 | Collecting facility of high melting point component in gas and collecting facility of dihalogenated aromatic compound in gas |
| CN201384868Y (en) * | 2009-03-25 | 2010-01-20 | 泰州百力化学有限公司 | Isophthalodinitrile watering absorbing and gathering system |
| CN201565153U (en) * | 2009-09-28 | 2010-09-01 | 浙江省常山化工有限责任公司 | Fin type crystallizer for nitrochlorobenzene production |
| CN202128939U (en) * | 2011-06-09 | 2012-02-01 | 浙江省环境工程有限公司 | Device for treating nitrochlorobenzene waste gas |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752126A (en) * | 2014-01-04 | 2014-04-30 | 江苏民生特种设备集团有限公司 | Spraying separator device |
| CN104707430A (en) * | 2015-03-04 | 2015-06-17 | 中国石油化工股份有限公司 | Nitrochlorobenzene waste gas treatment device in tank truck loading process |
| CN104707430B (en) * | 2015-03-04 | 2016-08-10 | 中国石油化工股份有限公司青岛安全工程研究院 | Chloronitrobenzene emission-control equipment during tank car entrucking |
| CN107899401A (en) * | 2017-11-27 | 2018-04-13 | 麻城市中优顺建材科技有限公司 | A kind of acrylic factory waste gas treatment process |
| CN111921220A (en) * | 2020-06-22 | 2020-11-13 | 苏州硕冠环境科技有限公司 | Cooling recovery processing method for solid material after gas material is cooled |
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Application publication date: 20111012 |
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