CN201530786U - Toluene waste gas recycling system - Google Patents
Toluene waste gas recycling system Download PDFInfo
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- CN201530786U CN201530786U CN2009201993834U CN200920199383U CN201530786U CN 201530786 U CN201530786 U CN 201530786U CN 2009201993834 U CN2009201993834 U CN 2009201993834U CN 200920199383 U CN200920199383 U CN 200920199383U CN 201530786 U CN201530786 U CN 201530786U
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Abstract
The utility model relates to a toluene waste gas recycling system which comprises a toluene gathering device, an absorbing tower, a heat exchanger, an analyzing tower, an oil washing filter, a first condenser, a demulsifying tank, a spiral separator, a reboiler, a rectifying tower and a second condenser, wherein the lower portion of the absorbing tower is provided with a gas inlet, the gas inlet is connected with the toluene gathering device through a fan, the top portion of the absorbing tower is provided with a gas outlet, the upper portion of the absorbing tower is provided with a spray device, the spray device is connected with the oil washing tower through a lift pump, the bottom of the absorbing tower is provided with a rich oil outlet, the rich oil outlet is connected with a rich oil storage groove, the rich oil storage groove is connected with the inlet of the heat exchanger through the rich oil lift pump, the outlet of the heat exchanger is connected with the spray device arranged on the upper portion of the analyzing tower, and the bottom of the heat exchanger is provided with a steam inlet. The toluene waste gas recycling system has excellent absorbing effect, stable equipment running and convenient operation.
Description
(1) technical field
The utility model relates to a kind of toluene waste gas recovery system.
(2) background technology
Toluene in the atmosphere pollution mainly comes from solvent loss and volatile emission that relevant discharging of gasoline and industrial production cause.In the use of spinning coating machine, coating machine, pasting machine, baking oven, mixing machine, vaporizer or other toluene solvant generation machines, can volatilize usually and discharge a large amount of toluene waste gas.Toluene is discharged into and had both caused environmental pollution in the atmosphere, is again a kind of huge wasting of resources.
Conventional art and the recovery method of using at present are to adopt activated carbon adsorption, desorb to reclaim technology: useless (tail) gas of toluene is introduced into the collection and confinement of gases machine, remove the dust dirt through filter earlier, again after indirect water-cooling formula gas cooler cools, it is poor to send into absorption with positive blower, adsorb toluene vapor with dress with highly effective active carbon in absorption is poor, and with water vapor desorption and regeneration saturated activity carbon, with desorption toluene condensation processed, and must reclaim toluene, cover is used for production system again.This waste-gas cleaning treatment system mainly comprises fly-ash separator, condenser and absorbent charcoal adsorber.
China utility model patent CN101104126 discloses a kind of absorbing recovery device that adopts charcoal absorption toluene class industrial gaseous waste, comprises gas collector, some adsorption tanks, condenser, fluid separator; Each adsorption tank bottom is provided with the gas inlet, the bottom is provided with liquid outlet, the top is respectively equipped with steam-in and exhaust port, described gas inlet, liquid outlet, steam-in and exhaust port are respectively equipped with valve, described gas collector is communicated with the gas inlet, liquid outlet is communicated with condenser, and condenser is communicated with liquid trap; The waste gas adsorption unit is installed in the described adsorption tank; described waste gas adsorption unit is the charcoal bed of lateral arrangement in adsorption tank inside; tiling has the seed activity carbon adsorbent on the described charcoal bed, and described charcoal bed is provided with perforate, and the diameter of perforate is less than the diameter of sorbent material.This utility model adopts activated carbon granule as sorbent material, and its desorption and regeneration energy consumption is low, and gas-flow resistance is little, and required power of fan is little, has realized low-cost big air quantity processing.
Adopt the shortcoming of above-mentioned recovery process unit to be:
1) activated carbon comprises fibre active carbon, and regeneration is influenced by PH; Usually regenerate with steam, require the acidic conditions of PH＜5, and every regeneration primary sorption decrease in efficiency some, after regeneration three to four times, need thoroughly to change, the depleted activated carbon is incorporated into dangerous solid useless the disposal, final disposal costs costliness, also the saturated regeneration period of activated carbon often needed manipulation of regeneration to two weeks in 10 days.
2) adopt activated carbon adsorption, only between 80 to 85%, the rate of recovery is low to the rate of recovery of toluene.
3) adopt activated carbon adsorption, though dissection process is arranged, the toluene purity that reclaims reaches 85 to 90% most, and purity is not high.
In addition, Chinese patent CN101332396 discloses a kind of toluene recovery device.It is made up of aspiration channel, adjusting air-valve, filtration chamber, centrifugal blower, adsorption tanks, condenser, cyclic water tank, separator box and container for storing liquid.Join successively between aspiration channel, filtration chamber, centrifugal blower.Inlet mouth and air outlet are divided others in the top of adsorption tanks and bottom, and the end that pneumavalve and condenser are crossed in air outlet wherein joins.The inlet mouth of cyclic water tank and air outlet are connected with the two ends of condenser respectively.Be characterized between centrifugal blower and adsorption tanks separating tank being arranged.This separating tank communicates with the outlet of centrifugal blower, and the current-sharing water trap is arranged in it.The current-sharing water trap joins by the opening for feed of valve and pipeline and adsorption tanks.Point sucking type disk filter and suction nozzle are arranged in the filtration chamber, between suction nozzle and filtration chamber's import the air return tank is arranged, dirt-collection bag in the air return tank.This toluene recovery device, floor space is few, failure rate and maintenance rate is low, cost recovery is low.Be applicable to the chemical plant, a large amount of toluene places of using such as factory and coating factory etc. of dying cloth.
Chinese patent CN101229471 discloses the toluol-benzene solvent recovery technology from vent gas in a kind of toluene oxidation method production hexanolactam, it may further comprise the steps: after the toluol-benzene tail gas of discharging in the toluene oxidation device entered the absorption tower, the absorption agent that sprays into cat head carried out gas-liquid counter current and contacts under 20～50 ℃, 0.5～1.0MPA; When the specific absorption of toluol-benzene tail gas reaches 90～98%, the above-mentioned solution that is absorbed with toluol-benzene is delivered to Analytic Tower, under 90～108 ℃ and 0.1～0.12MPA, carry out desorb; When above-mentioned desorption efficiency reaches 95% when above, reclaim after containing the toluol-benzene mixed gas and be cooled to 20～40 ℃ after the desorb, the absorption agent after the desorb recycles after being cooled to 20～50 ℃.The toluene of the utility model technology, the benzene rate of recovery can reach more than 90%, toluol-benzene after the recovery adds up to content (GC) can reach more than 95%, not only make toluene, benzene be able to efficient recovery, Pai Fang gas reaches the pollution exhaust criteria of country and industry regulation fully simultaneously, and has improved business economic benefit and social benefit.
Chinese patent CN1597051 discloses the method for a kind of toluene waste gas as raw material taking back and process environmental pollution.Its step is that toluene waste gas enters the adsorption unit that gac is housed through filter, water cooler, induced draft fan; Purified gas after absorption enters atmosphere; When the charcoal absorption toluene in the adsorption unit was extremely saturated, the toluene waste gas switching that enters adsorption unit entered other absorption unit, closes the valve of the saturated adsorption unit of former absorption simultaneously; Carry out desorption to adsorbing saturated adsorption unit; Toluene, hot water and water vapor through desorption are cooled to normal temperature; After the cooled mixed liquor body AUTOMATIC ZONING, upper toluene flows into the toluene intermediate storage tank, lower floor's clear water discharging; The toluene of intermediate storage tank is pumped to the methylbenzene raw material groove.Its rate of recovery is higher than 65%.Purified the environment of production plant, the toluene level＜40MG/M of the purified gas after the purification
3, reach the GB secondary standard, benzene＜17MG/M
3, toluene＜60MG/M
3
Chinese patent CN1994984 discloses a kind of method that reclaims benzene and toluene, mainly comprise steps such as pre-rectifying, abstraction distillation system, Separation of Benzene and toluene, pre-rectifying tower is suitably pressurizeed, but its working pressure is lower, service temperature is also lower, adopt the reboiler thermal source of pre-rectifying tower overhead vapours as the benzene toluene knockout tower, not only the reboiler of benzene toluene knockout tower no longer needs to provide in addition thermal source, save the investment of pre-rectifying tower top condensate cooler simultaneously, also condensate cooler provides refrigerant for this reason; The total system investment is less, and the sepn process energy consumption is lower, and production cost is also low.
(3) utility model content
Technical problem to be solved in the utility model provides a kind of good absorbing effect, stable equipment operation, easy to operate toluene waste gas recovery system.
A kind of toluene waste gas recovery system, described recovery system comprise toluene collection device, absorption tower, heat exchanger, Analytic Tower, washing oil strainer, first condenser, breakdown of emulsion jar, spiral separator, reboiler, rectifying tower and second condenser;
Bottom, described absorption tower is provided with the gas inlet, and the gas inlet connects the toluene collection device through blower fan, and the top, absorption tower is provided with pneumatic outlet;
Top, described absorption tower is provided with spray equipment, and spray equipment connects oil-washing tank through lift pump;
Bottom, described absorption tower is provided with the rich oil outlet, and the rich oil outlet connects the rich oil storage tank, and the rich oil storage tank connects heat exchanger entrance through the rich oil lift pump, and heat exchanger outlet connects the spray equipment that is positioned at Analytic Tower top, and the heat exchanger bottom is provided with the steam-in;
Described Analytic Tower bottom is respectively equipped with washing oil outlet and steam-in, and the washing oil outlet connects the washing oil filter inlet through lift pump, and the washing oil filter outlet connects oil-washing tank;
Described Analytic Tower top connects first condenser inlet, and first condensator outlet connects breakdown of emulsion jar inlet;
Described breakdown of emulsion jar outlet connects spiral separator, and the spiral separator bottom connects the cold water storage tank;
Described spiral separator top connects reboiler, and the reboiler top connects rectifying tower, and rectifier bottoms connects the reboiler bottom, and the reboiler bottom is provided with the steam-in;
Described rectifying tower top connects second condenser inlet, and second condensator outlet connects the toluene storage tank.
Further, described first condenser is connected same cooling tower with second condenser respectively through recycle pump, and the water coolant storage tank connects cooling tower through lift pump.
Further, described reboiler is the shell and tube reboiler.
Further, described absorption tower is a rotating stream tray scrubber, and described rotating stream tray scrubber middle part longitudinally is provided with five layers of eddy flow plate, and the spray equipment top is provided with the demist plate, is provided with the Stainless Steel Wire corrugated wire gauze packing between demist plate and the spray equipment.
Further, described Analytic Tower is the filler Analytic Tower, and Analytic Tower spray equipment below is provided with shell and tube heat exchanger, and the shell and tube heat exchanger below is provided with first packing layer, and first packing layer below is provided with groove type distributor, and the groove type distributor below is provided with second packing layer.
Toluene waste gas recovery system of the present utility model has following beneficial effect:
1). diesel oil (washing oil) eddy flow plate spray absorber assimilation effect is obvious, the toluene rate of recovery of this technology can reach more than 90%, toluene after the recovery adds up to content (GC) can reach more than 95%, make that not only toluene is able to efficient recovery, Pai Fang gas reaches the pollution exhaust criteria of country and industry regulation fully simultaneously;
2). eddy flow plate spray absorber and ripple packing Analytic Tower equipment are reliable stable, have exercisable long-lastingly, and work-ing life is more than 10 years;
3). toluene waste gas recovery system of the present utility model can conveniently dispose PLC programming Control system, and is easy to operate.
(4) description of drawings
Fig. 1 is the structural representation of the utility model toluene waste gas recovery system.
Fig. 2 is the structural representation on absorption tower described in the utility model.
Fig. 3 is the structural representation of Analytic Tower described in the utility model.
(5) embodiment
Below by the drawings and specific embodiments the technical solution of the utility model is done detailed description further.
With reference to Fig. 1, a kind of toluene waste gas recovery system, described recovery system comprise toluene collection device 1, absorption tower 3, heat exchanger 8, Analytic Tower 9, washing oil strainer 16, first condenser 10, breakdown of emulsion jar 17, spiral separator 18, reboiler 19, rectifying tower 20 and second condenser 21;
3 bottoms, described absorption tower are provided with gas inlet 27, and the gas inlet connects toluene collection device 1 through blower fan 2, and the top, absorption tower is provided with pneumatic outlet 29;
3 tops, described absorption tower are provided with spray equipment 25, and spray equipment connects oil-washing tank 4 through lift pump 5; 3 bottoms, described absorption tower are provided with rich oil outlet 28, the rich oil outlet connects rich oil storage tank 6, rich oil storage tank 6 connects heat exchanger entrance through rich oil lift pump 7, and heat exchanger outlet connects the spray equipment 34 that is positioned at Analytic Tower 9 tops, and the heat exchanger bottom is provided with the steam-in;
Described Analytic Tower 9 bottoms are respectively equipped with washing oil outlet and steam-in, and the washing oil outlet connects washing oil strainer 16 inlets through lift pump 15, and 16 outlets of washing oil strainer connect oil-washing tank 4;
Described Analytic Tower 9 tops connect first condenser, 10 inlets, and 10 outlets of first condenser connect breakdown of emulsion jar 17 inlets;
Described breakdown of emulsion jar 17 outlets connect spiral separator 18, and spiral separator 18 bottoms connect cold water storage tank 13; Described spiral separator 18 tops connect reboiler 19, and reboiler 19 tops connect rectifying tower 20, and rectifying tower 20 bottoms connect reboiler 19 bottoms, and reboiler 19 bottoms are provided with the steam-in;
Described rectifying tower top connects second condenser, 21 inlets, and 21 outlets of second condenser connect toluene storage tank 22.
Described first condenser is connected same cooling tower 11 with second condenser respectively through recycle pump 12, and water coolant storage tank 13 connects cooling tower 11 through lift pump 14.
Described reboiler 19 is the shell and tube reboiler.
With reference to Fig. 2, described absorption tower 3 is a rotating stream tray scrubber, and described rotating stream tray scrubber middle part longitudinally is provided with five layers of eddy flow plate 23, and spray equipment 25 tops are provided with demist plate 24, are provided with Stainless Steel Wire corrugated wire gauze packing 26 between demist plate 24 and the spray equipment 25.
With reference to Fig. 3, described Analytic Tower 9 is the filler Analytic Tower, is provided with shell and tube heat exchanger 30, first packing layer 31, groove type distributor 32 and second packing layer 33 in the Analytic Tower from top to bottom successively.
Workflow of the present utility model is:
Toluene waste gas feeds in the absorption tower 3 through blower fan after toluene collection device 1 is collected, and from last and go up the washing oil heat and mass of spray, washing oil absorbs most toluene (rate of recovery is greater than 95%) and becomes rich oil; Rich oil enters filler Analytic Tower 9 and steam heat and mass after heat exchanger 8 heating, toluene is separated out from rich oil and discharged from Analytic Tower 9 tops with steam and enters first condenser 10, obtains the emulsion of water and toluene; Emulsion behind breakdown of emulsion jar 17 breakdowns of emulsion, enters spiral separator 18 water is separated with toluene again, and toluene enters shell and tube reboiler 19 from the spiral separator top, enters rectifying tower rectifying, condensation and obtain purity greater than 99.2% toluene after heating.
Should be noted that at last the above only is an embodiment of the present utility model, rather than be used for limiting practical range of the present utility model, every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, be the utility model claim scope and cover.
Claims (6)
1. toluene waste gas recovery system, it is characterized in that: described recovery system comprises toluene collection device, absorption tower, heat exchanger, Analytic Tower, washing oil strainer, first condenser, breakdown of emulsion jar, spiral separator, reboiler, rectifying tower and second condenser;
Bottom, described absorption tower is provided with the gas inlet, and the gas inlet connects the toluene collection device through blower fan, and the top, absorption tower is provided with pneumatic outlet;
Top, described absorption tower is provided with spray equipment, and spray equipment connects oil-washing tank through lift pump;
Bottom, described absorption tower is provided with the rich oil outlet, and the rich oil outlet connects the rich oil storage tank, and the rich oil storage tank connects heat exchanger entrance through the rich oil lift pump, and heat exchanger outlet connects the spray equipment that is positioned at Analytic Tower top, and the heat exchanger bottom is provided with the steam-in;
Described Analytic Tower bottom is respectively equipped with washing oil outlet and steam-in, and the washing oil outlet connects the washing oil filter inlet through lift pump, and the washing oil filter outlet connects oil-washing tank;
Described Analytic Tower top connects first condenser inlet, and first condensator outlet connects breakdown of emulsion jar inlet;
Described breakdown of emulsion jar outlet connects spiral separator, and the spiral separator bottom connects the cold water storage tank;
Described spiral separator top connects reboiler, and the reboiler top connects rectifying tower, and rectifier bottoms connects the reboiler bottom, and the reboiler bottom is provided with the steam-in;
Described rectifying tower top connects second condenser inlet, and second condensator outlet connects the toluene storage tank.
2. according to the toluene waste gas recovery system of claim 1, it is characterized in that: described first condenser is connected same cooling tower with second condenser respectively through recycle pump, and the water coolant storage tank connects cooling tower through lift pump.
3. according to the toluene waste gas recovery system of claim 1, it is characterized in that: described reboiler is the shell and tube reboiler.
4. according to the described toluene waste gas recovery system of one of claim 1～3, it is characterized in that: described absorption tower is a rotating stream tray scrubber, described rotating stream tray scrubber middle part longitudinally is provided with five layers of eddy flow plate, the spray equipment top is provided with the demist plate, is provided with the Stainless Steel Wire corrugated wire gauze packing between demist plate and the spray equipment.
5. according to the described toluene waste gas recovery system of one of claim 1～3, it is characterized in that: described Analytic Tower is the filler Analytic Tower, Analytic Tower spray equipment below is provided with shell and tube heat exchanger, the shell and tube heat exchanger below is provided with first packing layer, first packing layer below is provided with groove type distributor, and the groove type distributor below is provided with second packing layer.
6. toluene waste gas recovery system according to claim 4, it is characterized in that: described Analytic Tower is the filler Analytic Tower, Analytic Tower spray equipment below is provided with shell and tube heat exchanger, the shell and tube heat exchanger below is provided with first packing layer, first packing layer below is provided with groove type distributor, and the groove type distributor below is provided with second packing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201993834U CN201530786U (en) | 2009-10-29 | 2009-10-29 | Toluene waste gas recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201993834U CN201530786U (en) | 2009-10-29 | 2009-10-29 | Toluene waste gas recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201530786U true CN201530786U (en) | 2010-07-21 |
Family
ID=42526191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201993834U Expired - Fee Related CN201530786U (en) | 2009-10-29 | 2009-10-29 | Toluene waste gas recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201530786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502649A (en) * | 2011-09-28 | 2012-06-20 | 陆飞飞 | Heat and mass transfer device with rotational flow boards in process of producing polycrystalline silicon |
| CN109400439A (en) * | 2018-10-25 | 2019-03-01 | 苏州浩波科技股份有限公司 | A kind of cooling liquid recyclable device of methylene chloride |
-
2009
- 2009-10-29 CN CN2009201993834U patent/CN201530786U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502649A (en) * | 2011-09-28 | 2012-06-20 | 陆飞飞 | Heat and mass transfer device with rotational flow boards in process of producing polycrystalline silicon |
| CN102502649B (en) * | 2011-09-28 | 2014-05-14 | 陆飞飞 | Heat and mass transfer device with rotational flow boards in process of producing polycrystalline silicon |
| CN109400439A (en) * | 2018-10-25 | 2019-03-01 | 苏州浩波科技股份有限公司 | A kind of cooling liquid recyclable device of methylene chloride |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20111029 |