CN106000055B - A kind of processing system of tail gas recycle containing naphthalene and method - Google Patents
A kind of processing system of tail gas recycle containing naphthalene and method Download PDFInfo
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- CN106000055B CN106000055B CN201610554554.5A CN201610554554A CN106000055B CN 106000055 B CN106000055 B CN 106000055B CN 201610554554 A CN201610554554 A CN 201610554554A CN 106000055 B CN106000055 B CN 106000055B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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Abstract
The invention discloses a kind of processing system of tail gas recycle containing naphthalene and method.The processing system of tail gas recycle containing naphthalene of the present invention includes T-shaped threeway, naphthalene trapping recover, spray column, air-introduced machine, blow-down pipe, blast pipe, water-supply-pipe, pump, liquid naphthalene discharging mouth, control valve, strainer, liquid storage tank and reservoir；The processing system of tail gas recycle containing naphthalene is connected with reaction kettle, and the reaction kettle is equipped with reaction kettle exhaust outlet；The T-shaped threeway is connected with reaction kettle exhaust outlet, naphthalene trapping recover, liquid naphthalene discharging mouth respectively；The naphthalene trapping recover is connected with spray column, and spray column is connected with air-introduced machine, and air-introduced machine is connected with blow-down pipe.The processing system of tail gas recycle containing naphthalene and method of the present invention, greatly reduce the human cost of recycling naphthalene, and the clear naphthalene that need not stop production, improve the performance of enterprises.This method and system enter operation in equipment containing naphthalene without operating personnel, reduce damage of the naphthalene gas to operating personnel's body, have ensured the occupational health and safety of employee.
Description
Technical field
The invention belongs to chemical field, and in particular to the processing system of tail gas recycle containing naphthalene and side in a kind of chemical process
Method.
Background technology
Crude naphthalene is the important source material of Organic Chemical Industry, it is mainly processed further by coal tar and oil gas tar
Separation is produced.It is crystal under naphthalene room temperature, but it is volatile, it is poisonous.Either still other are synthesized using naphthalene in industrial producing naphthalene
During product, due to the volatility of naphthalene, the tail gas containing naphthalene is directly discharged in air, not only causes the waste of naphthalene resource, but also right
Air pollutes.During exhaust emissions containing naphthalene, due to the characteristic that naphthalene steam is easily sublimated, also tail gas pipeline can be caused to block up
Plug, influences production safety, and the cleaning that stops production can cause to seriously affect to continuous production again, add production cost.
The system of existing traditional processing tail gas containing naphthalene is only using spray process processing tail gas, then by the solid in spray liquid
Naphthalene filters out, this processing mode only filtration stage recycle solid naphthalene, more reaction kettles work at the same time naphthalene volatile quantity it is big when, need
The work of naphthalene reclaimer operation staff intensive is wanted, and the naphthalene being recovered by filtration at least needs to reuse after drying.
The Chinese patent literature of Application No. 201010237315, which discloses, " to be used in synthesizing process of high-efficiency water reducing agent remain
The recycling expansion chamber of naphthalene ", it provides a kind of recycling expansion chamber for being used for naphthalene steam in production process, but the invention needs to grasp
Make personnel into naphthalene expansion chamber recycling naphthalene, not only need to disable reclaimer, it is also necessary to which it is dense that operating personnel enter toxic gas
The higher expansion chamber of degree, may damage personnel health.
The Chinese patent literature of Application No. 201310260094 discloses " a kind of Industrial naphthalene recovery device ", it is provided
A kind of Industrial naphthalene recovery device, it passes through collecting box and filter bag collects condensed solid naphthalene.The device was being run
Cheng Zhong, it is still necessary to which off-stream unit and then manual cleaning go out the naphthalene of recycling, use or inconvenient.
The content of the invention
For the organic efficiency present in existing exhaust gas treating method containing naphthalene or equipment it is poor, recycling naphthalene cannot directly make
With, need to stop production clear naphthalene, high labor cost the shortcomings of, the present invention provides a kind of processing system of tail gas recycle containing naphthalene and method, solves
Determine the above problem.
The technical problems to be solved by the invention are realized using following technical scheme：
The present invention provides a kind of processing system of tail gas recycle containing naphthalene, including T-shaped threeway, naphthalene trap recover, spray column,
Air-introduced machine, blow-down pipe, blast pipe, water-supply-pipe, pump, liquid naphthalene discharging mouth, control valve, strainer, liquid storage tank and reservoir；
The processing system of tail gas recycle containing naphthalene of the present invention is used to be given birth to by one of raw material or one of product of crude naphthalene
The reaction kettle of production, and be connected by blast pipe with the reaction kettle for emission or pressure balanced exhaust outlet；
The processing system of tail gas recycle containing naphthalene is connected with reaction kettle, and the reaction kettle is equipped with reaction kettle exhaust outlet；
Described T-shaped threeway one end is connected by blast pipe with the reaction kettle exhaust outlet, and another both ends trap back with naphthalene respectively
Receive device, the connection of liquid naphthalene discharging mouth；The T-shaped threeway is connected to reaction kettle exhaust outlet and the both ends of liquid naphthalene discharging mouth have been respectively mounted control
Valve；
The upper end outlet mouth of pipe of the naphthalene trapping recover is connected with the air inlet of the spray column lower end by blast pipe,
The air outlet on the spray column top is connected with the air-introduced machine by blast pipe, the air-introduced machine exhaust outlet and the blow-down pipe
Connection, spray column lower end discharge outlet are connected with the liquid storage tank, and upper end water inlet passes through water-supply-pipe and the filtrate through pump
Pond connects；Strainer is installed between the liquid storage tank and the reservoir；
The naphthalene trapping recover is mainly made of naphthalene trapping recover shell, heat exchanger tube, baffle plate, tube sheet component；Treat
Tail gas is handled by the lower end air inlet mouth of pipe of naphthalene trapping recover to be entered, upper end outlet mouth of pipe is gone out, the liquid naphthalene of recycling by lower end into
Gas tube orifice flows out；It is refrigerating mode when being from bottom to top passed through cooling water to heat exchanger tube, being from top to bottom passed through heating to heat exchanger tube steams
It is heating mode during vapour；
The spray column is mainly made of spray shell, demister, sprayer, packing layer component；Described filler layer by
Pall ring forms；
Liquid in the spray column, liquid storage tank and reservoir is the alkalescent water that pH value is 8~10；
The naphthalene trapping recover is made of corrosion-resistant material.
Preferably, the naphthalene trapping recover is made of enamel, zircaloy, tantalum alloy, Hastelloy, stainless steel.
Preferably, the Pall ring is made of ceramics, stainless steel, polypropylene, polyvinyl chloride, polytetrafluoroethylene (PTFE).
Preferably, the demister is the wire mesh demister being made of stainless steel wire.
The present invention also provides a kind of processing method of tail gas recycle containing naphthalene using the recovery and processing system, specifically include with
Lower step：
(1) tail gas containing naphthalene enters naphthalene trapping recover by reaction kettle exhaust outlet in reaction kettle, and the naphthalene traps recover
In refrigerating mode, most naphthalenes are cooled as temperature reduces to be set in the naphthalene trapping recover；
(2) tail gas after step (1) processing is entered in spray column by the outlet mouth of pipe of naphthalene trapping recover upper end again, tail
Residual naphthalene in gas becomes solid as temperature further reduces and is deposited in the liquid sprayed in spray column, and passes through spray column
Lower end discharge outlet is drained into liquid storage tank, is emptied through the tail gas that this step process is crossed by air-introduced machine into blow-down pipe；
(3) by the strainer between the liquid storage tank and reservoir, the solid naphthalene in liquid storage tank is filtered out, then by reservoir
In purified filtrate spray column is delivered to by spray column upper end water inlet through pumping；
(4) naphthalene trapping recover is in heating mode, naphthalene therein will be set in be fused into liquid naphthalene and flow back to instead
Answer kettle or reused after being collected by the discharge of liquid naphthalene discharging mouth.
The present invention provides a kind of processing method of tail gas recycle containing naphthalene and system, recover is trapped by naphthalene, by tail gas
Most naphthalenes cooling wherein and can direct reuse to reaction kettle or discharge collection after reuse, greatly reduce recycling
The human cost of naphthalene, and the clear naphthalene that need not stop production are handled, improves the performance of enterprises.This method and system enter without operating personnel
Operation in equipment containing naphthalene, reduces damage of the naphthalene gas to operating personnel's body, has ensured the occupational health and safety of employee.
Brief description of the drawings
Fig. 1 is the structure diagram of naphthalene tail gas recycle processing system of the present invention.
Fig. 2 is the structure diagram that naphthalene traps recover in naphthalene tail gas recycle processing system of the present invention, wherein (a) is
Refrigerating mode, (b) are heating mode.
Fig. 3 is the structure diagram of spray column in naphthalene tail gas recycle processing system of the present invention.
Fig. 4 is the structure diagram of existing traditional naphthalene tail gas recycle processing system.
In figure, 01- reaction kettles, 02- reaction kettle exhaust outlets, 03- control valves, 04- control valves, 05-T type threeways,
06- liquid naphthalene discharging mouths, 07- naphthalenes trapping recover, 08- spray columns, 09- air-introduced machines, 10- blow-down pipes, 11- pumps, 12-
Liquid storage tank, 13- reservoirs, 14- strainers, 15- blast pipes, 16- water-supply-pipes, 17- naphthalenes trapping recover shell, 18- are changed
Heat pipe, 19- baffle plates, 20- tube sheets, 21- air inlet mouth of pipe, 22- outlet mouth of pipe, 23- cooling water inlets/heating steam go out
Mouthful, 24- cooling water outlets/heating steam import, 25- spray shells, 26- air inlets, 27- air outlets, 28- water inlets
Mouth, 29- discharge outlet, 30- demisters, 31- sprayers, 32- packing layers, A- go out kettle tail gas, B- cooling waters, C- recycling
Liquid naphthalene, D- heating steams.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with Figure of description, present disclosure is made into one
Walk explanation.Certainly the invention is not limited to the specific embodiment, the general replacement known to those skilled in the art
Cover within the scope of the present invention.Secondly, the present invention has carried out detailed statement using schematic diagram, real the present invention is described in detail
During example, for convenience of description, schematic diagram is not partially enlarged in proportion to the general scale, should not be in this, as limitation of the invention.
Embodiment
The present invention provides a kind of processing method of tail gas recycle containing naphthalene first, steps of the method are：
(1) tail gas containing naphthalene enters naphthalene trapping recover by reaction kettle exhaust outlet in reaction kettle, and the naphthalene traps recover
In refrigerating mode, most naphthalenes are cooled as temperature reduces to be set in the naphthalene trapping recover；
(2) tail gas after step (1) processing is entered in spray column by the outlet mouth of pipe of naphthalene trapping recover upper end again, tail
Residual naphthalene in gas becomes solid as temperature further reduces and is deposited in the liquid sprayed in spray column, and passes through spray column
Lower end discharge outlet is drained into liquid storage tank, is emptied through the tail gas that this step process is crossed by air-introduced machine into blow-down pipe；
(3) by the strainer between the liquid storage tank and reservoir, the solid naphthalene in liquid storage tank is filtered out, then by reservoir
In purified filtrate spray column is delivered to by spray column upper end water inlet through pumping；
(4) naphthalene trapping recover is in heating mode, naphthalene therein will be set in be fused into liquid naphthalene and flow back to instead
Answer kettle or reused after being collected by the discharge of liquid naphthalene discharging mouth.
Wherein, the liquid of the spray column injection is the alkalescent water that pH is 8~9.
For implementation method, the present invention also devises a kind of processing system of tail gas recycle containing naphthalene at the same time, as shown in the figure, including
T-shaped threeway 05, naphthalene trapping recover 07, spray column 08, air-introduced machine 09, blow-down pipe 10, blast pipe 15, pump 11,12 and of liquid storage tank
Reservoir 13；
Described 05 one end of T-shaped threeway is connected by blast pipe 15 with the reaction kettle exhaust outlet 02 that reaction kettle 01 is equipped with, separately
Both ends are connected with naphthalene trapping recover 07, liquid naphthalene discharging mouth 06 respectively；The T-shaped threeway 05 is connected to reaction kettle exhaust outlet 02 and liquid
The both ends of naphthalene discharging mouth 06 have been respectively mounted control valve 03,04；
The upper end outlet mouth of pipe 22 of naphthalene trapping recover 07 and the air inlet 26 of 08 lower end of spray column by into
Air hose 15 connects, and the air outlet 27 on 08 top of spray column is connected with the air-introduced machine 09 by blast pipe 15, the air inducing
Machine exhaust outlet is connected with the blow-down pipe 10, and spray column lower end discharge outlet 29 is connected with the liquid storage tank 12, upper end water inlet
Mouth 28 is connected through pump 11 by water-supply-pipe 16 with the reservoir 13；It is provided between the liquid storage tank 12 and the reservoir 13
Strainer 14；
The naphthalene trapping recover 07 is mainly by naphthalene trapping recover shell 17, heat exchanger tube 18, baffle plate 19, tube sheet 20
Part is formed；Pending tail gas is entered by the lower end air inlet mouth of pipe 21 of naphthalene trapping recover 07, and upper end outlet mouth of pipe 22 is gone out, recycling
Liquid naphthalene flowed out by lower end air inlet mouth of pipe 21；Be refrigerating mode when being from bottom to top passed through cooling water to heat exchanger tube, from top to bottom to
It is heating mode that heat exchanger tube, which is passed through when heating steam,.
The spray column 08 is mainly made of components such as shell 25, demister 30, sprayer 31, packing layers 32；It is described to remove
Foam device 30 is stainless steel cloth demister；Described filler layer 32 is made of ceramic Pall ring.
Wherein, during reaction kettle operation release tail gas containing naphthalene, holding control valve 03 is opened and control valve 04 is closed, naphthalene trapping
Recover 07 is from bottom to top passed through cooling water, and tail gas containing naphthalene enters recovery and processing system and cooled trapping；Naphthalene is recycled to reaction
During kettle, holding control valve 03 is opened and control valve 04 is closed, and naphthalene trapping recover 07 is from top to bottom passed through heating steam, makes back
The liquid naphthalene of receipts flows back to reaction kettle；When being collected outside recovered liquid naphthalene to system, holding control valve 03 is closed and control valve 04 is opened, naphthalene
Trapping recover 07 is from top to bottom passed through heating steam, makes the liquid naphthalene efflux naphthalene discharging mouth 06 of recycling and is collected.
Comparative example
Existing traditional naphthalene tail gas recycle processing system as shown in Figure 4, it mainly handles tail gas containing naphthalene by spray column, so
The naphthalene for spraying condensation is filtered out into collection by the strainer in pond afterwards.
In order to further illustrate the beneficial effect of embodiment of the present invention, by the exhaust treatment system of the present invention and comparative example
Respectively with using crude naphthalene to be connected as the reaction kettle exhaust outlet of raw material on production line, to test their vent gas treatment effect.
The reaction kettle is used for the sulfonating reaction in naphthalene series high-efficiency water-reducing agent synthesis.The sulfonating reaction process is：Thrown into reaction kettle
Enter 1800Kg crude naphthalenes (95% content), heating melts naphthalene and is warming up to 135~140 DEG C, the addition 2000Kg concentrated sulfuric acids (98%
Content), temperature of charge is risen to 160~165 DEG C, then keep the temperature 3h in the temperature range, sulfonating reaction terminates to turn material
Other kettles are moved to be used to synthesize in next step.Air-introduced machine and spray column are always maintained at operating mode.From input crude naphthalene to a batch
Synthesis terminates, and naphthalene trapping recover 07 is in refrigerating mode trapping naphthalene steam；After synthesis, naphthalene trapping recover 07, which is in, to be added
Heat pattern recycles naphthalene.
The concentration of naphthalene steam, the unified selection of minute point are being kept the temperature in the air outlet measure tail gas of tail gas blow-down pipe
During 0.5h, multi-stage synthesis is averaged.
The effect of vent gas treatment containing naphthalene under 1 different embodiments of table
As can be seen from the above results, after the processing method and system of tail gas recycle containing naphthalene using the present invention, about 90%
Recycling naphthalene reaction kettle utilization is collected or directly returned from row's naphthalene mouth, greatly reduce the workload of naphthalene reclaimer operation personnel；
The amount of present system recycling naphthalene is substantially proportional to synthesis number, shows that the system can sustainedly and stably be run；Either make
Liquid naphthalene flow direction row's naphthalene mouth or reaction kettle of recycling, the amount that strainer collects naphthalene are basically unchanged, and the concentration of naphthalene is not substantially yet in tail gas
Become, both ways of recycling do not influence to recycle effect；Under identical synthesis number, the naphthalene total amount outline of present system recycling
Higher than the naphthalene amount of comparative example recycling, and the concentration of naphthalene is also significantly lower than comparative example in tail gas, illustrates the recycling of present system
Efficiency is higher than recovery system traditional in comparative example.
Claims (1)
1. a kind of processing method of tail gas recycle containing naphthalene using the processing system of tail gas recycle containing naphthalene, it is characterised in that described to contain naphthalene
Tail gas recycle processing system includes T-shaped threeway (05), naphthalene trapping recover (07), spray column (08), air-introduced machine (09), blow-down pipe
(10), blast pipe (15), water-supply-pipe (16), pump (11), liquid naphthalene discharging mouth (06), control valve (03,04), strainer (14), liquid storage
Pond (12) and reservoir (13)；
The processing system of tail gas recycle containing naphthalene is connected with reaction kettle (01), and the reaction kettle is equipped with reaction kettle exhaust outlet
(02)；
Described T-shaped threeway (05) one end is connected by blast pipe (15) with reaction kettle exhaust outlet (02), and another both ends are caught with naphthalene respectively
Collect recover (07), liquid naphthalene discharging mouth (06) connection；The T-shaped threeway (05) is connected to reaction kettle exhaust outlet (02) and liquid naphthalene discharging
The both ends of mouth (06) have been respectively mounted control valve (03,04)；
The upper end outlet mouth of pipe (22) of the naphthalene trapping recover (07) and the air inlet (26) of the spray column (08) lower end are logical
Blast pipe (15) connection is crossed, air outlet (27) and the air-introduced machine (09) on spray column (08) top pass through blast pipe (15)
Connection, the air-introduced machine exhaust outlet connects with the blow-down pipe (10), spray column (08) the lower end discharge outlet (29) with it is described
Liquid storage tank (12) connects, and upper end water inlet (28) is connected through pumping (11) by water-supply-pipe (16) with the reservoir (13)；It is described
Strainer (14) is installed between liquid storage tank (12) and the reservoir (13)；
Naphthalene trapping recover (07) is mainly by naphthalene trapping recover shell (17), heat exchanger tube (18), baffle plate 19), tube sheet
(20) component is formed；Pending tail gas is entered by the lower end air inlet mouth of pipe (21) of naphthalene trapping recover (07), upper end outlet mouth of pipe
(22) go out, the liquid naphthalene of recycling is flowed out by lower end air inlet mouth of pipe (21)；It is when being from bottom to top passed through cooling water to heat exchanger tube (18)
Refrigerating mode, is heating mode when being from top to bottom passed through heating steam to heat exchanger tube (18)；
The spray column (08) is mainly by spray shell (25), demister (30), sprayer (31), packing layer (32) component structure
Into；(32 are made of described filler layer Pall ring；
Liquid in the spray column (08), liquid storage tank (12) and reservoir (13) is the alkalescent water that pH value is 8~10；
The naphthalene trapping recover (07) is made of corrosion-resistant material；Naphthalene trapping recover (07) by enamel, zircaloy,
Tantalum alloy, Hastelloy or stainless steel are made；
The Pall ring is made of ceramics, stainless steel, polypropylene, polyvinyl chloride or polytetrafluoroethylene (PTFE)；
The demister (30) is the wire mesh demister being made of stainless steel wire；
The processing method of tail gas recycle containing naphthalene specifically includes following steps：
(1) tail gas containing naphthalene enters naphthalene trapping recover (07) by reaction kettle exhaust outlet (02) in reaction kettle (01), and the naphthalene is caught
Collection recover (07) is in refrigerating mode, and most naphthalenes are cooled as temperature reduces to be set in the naphthalene trapping recover
(07) in；
(2) tail gas after step (1) processing enters spray column by the outlet mouth of pipe (22) of naphthalene trapping recover (07) upper end again
(08) in, the residual naphthalene in tail gas becomes solid as temperature further reduces and is deposited in the liquid sprayed in spray column (08)
In, and drained into by spray column (08) lower end discharge outlet (29) in liquid storage tank (12), the tail gas crossed through this step process is by drawing
Wind turbine (09) is emptied into blow-down pipe (10)；
(3) by the strainer (14) between the liquid storage tank (12) and reservoir (13), the solid naphthalene in liquid storage tank (12) is filtered out,
Then purified filtrate in reservoir (13) is delivered to spray through pumping (11) by spray column (08) upper end water inlet (28)
Tower (08)；
(4) naphthalene trapping recover (07) is in heating mode, naphthalene therein will be set in be fused into liquid naphthalene and flow back to instead
Answer kettle (01) or reused after being collected by liquid naphthalene discharging mouth (06) discharge.
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| CN108187483A (en) * | 2018-01-26 | 2018-06-22 | 常州大学 | A kind of naphthalene tail-gas deep treating column |
| CN110105162B (en) * | 2019-04-22 | 2024-04-19 | 宁夏凤城装备制造有限公司 | Vinyl chloride monomer recovery tank |
| CN110405162A (en) * | 2019-08-29 | 2019-11-05 | 郑州为新科技有限公司 | A kind of paint finishing |
| CN110559803A (en) * | 2019-10-11 | 2019-12-13 | 武汉三立鼎兴科技有限公司 | Naphthalene-containing waste gas treatment system and treatment method thereof |
| CN110904466B (en) * | 2019-11-12 | 2021-03-12 | 江苏乾宝生物科技有限公司 | Electrolytic sodium hypochlorite generator system and operation method |
| CN114210157A (en) * | 2021-12-20 | 2022-03-22 | 莱芜市兆信新材料股份有限公司 | Process for recovering dust particles in tail gas of naphthalene water reducer drying system |
| CN117282249B (en) * | 2023-11-24 | 2024-03-12 | 国能龙源环保有限公司 | Volatile organic compound exhaust gas treatment system |
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| CN102949917A (en) * | 2012-11-11 | 2013-03-06 | 奎屯达亿石油化工科技有限公司 | Naphthalene gas absorbing device and naphthalene gas absorbing method thereof |
| CN103331033A (en) * | 2013-06-26 | 2013-10-02 | 萧县鑫固混凝土外加剂有限公司 | Industrial naphthalene recovery device |
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| JPH04131101A (en) * | 1990-09-20 | 1992-05-01 | Nippon Steel Chem Co Ltd | Sublimable compound collecting method |
| CN102949917A (en) * | 2012-11-11 | 2013-03-06 | 奎屯达亿石油化工科技有限公司 | Naphthalene gas absorbing device and naphthalene gas absorbing method thereof |
| CN103331033A (en) * | 2013-06-26 | 2013-10-02 | 萧县鑫固混凝土外加剂有限公司 | Industrial naphthalene recovery device |
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| CN106000055A (en) | 2016-10-12 |
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