CN205216516U - VOCs's processing apparatus among industrial waste gas - Google Patents
VOCs's processing apparatus among industrial waste gas Download PDFInfo
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- CN205216516U CN205216516U CN201520901758.2U CN201520901758U CN205216516U CN 205216516 U CN205216516 U CN 205216516U CN 201520901758 U CN201520901758 U CN 201520901758U CN 205216516 U CN205216516 U CN 205216516U
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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 VOCs's processing apparatus among industrial waste gas, including the air -cooled heat exchanger, absorption tower, second grade heat exchanger, oil -water separation tank, overhead condenser, rectifying column, one -level heat exchanger, heating chamber, separation chamber, VOCs storage tank, evaporation -condensation ware and pump, the utility model provides a high -efficient segmentation circulation absorptions - rectification and evaporate and separate retrieve VOCs's among the industrial waste gas method and device, when improving the absorption efficiency to VOCs, have reduced the loss of absorbent, and the while has still reduced the absorption to moisture content in the tail gas, and its soakage only is the 1 percent -5 percent of tail gas water capacity, the utility model discloses discharging after becoming the organic matter into carbon dioxide, but adopting to absorb to VOCs's improvement and recycle the route, rationally screen through the absorbent, the VOCs rate of recovery can reach more than 99 percent, and circulating water, absorbent cyclic utilization, realizes the most genuine zero release totally.
Description
Technical field
The utility model design environmental protection and chemical separating field, specifically relate to the treating apparatus of VOCs in a kind of industrial waste gas.
Background technology
Industrial waste gas containing volatile organic matter (VOCs) is one of major source of atmosphere pollution.The method of the end-of-pipe control of VOCs improvement instantly mainly contains adsorption-regeneration method, absorption and separation method and Oxidative demage method three class.Current absorption method is extensively adsorbent with active carbon, when absorption reach VOCs saturated after, active carbon need adopt the method for hot blast, steam or transformation to carry out desorption.Carry out other rectifying, extraction or infiltration evaporation operation again containing the steam of VOCs or hot blast after desorption, VOCs is recycled.Absorption method has the high feature of purification compliance rate, but process route is longer, operating cost is larger.Oxidative demage method is different according to failure mode, can be divided into again that TO directly burns, RTO heat-accumulation combustion, RCO catalytic combustion and ACP atmosphere pressure glow discharge plasma etc.This technique has that energy consumption is low, the uncertain feature of security of operation, but investment cost is higher, and owing to being destroy processing mode, finally makes VOCs convert CO2 emission to.Relatively above two kinds of methods, absorption process has the features such as small investment, operating cost are low, but the absorption efficiency of purifying rate and selected absorbent is closely related.Absorbent is chosen improper, can cause the series of problems such as purification efficiency is low, absorbent consumption large, absorbent loss is large, the rear VOCs water content of absorption is large, regeneration energy consumption is high, have a strong impact on the application of absorption process.Therefore in the urgent need to seeking a kind of energy-efficient, industrial VOCs recovery processing technique that security of operation is stable, realizing the resource recycling of VOCs, and then improving the living environment quality of people.
Utility model content
Technical problem to be solved in the utility model is for existing VOCs end treatment technology Problems existing, a kind of stages cycle absorption-rectifying-evaporate and the treating apparatus being separated VOCs in the industrial waste gas that combines and reclaim are provided, the problems such as conventional suction method absorption efficiency is low to solve, absorbent consumption large, water content in air interference, regeneration energy consumption height, realize the high efficiente callback of VOCs and the recycling utilization of absorbent.
The technical solution of the utility model is as follows:
A treating apparatus of VOCs in industrial waste gas, is characterized in that comprising air-cooled heat exchanger, absorption tower, secondary heat exchanger, oil-water separation tank, overhead condenser, rectifying column, first-class heat exchanger, heating clamber, separation chamber, VOCs storage tank, evaporative condenser and pump; The tower reactor air inlet on absorption tower is connected with the outlet of air-cooled heat exchanger; Absorption tower is stages cycle, and every section of bottom is provided with liquid collecting distributing disc, and the outlet of liquid collecting distributing disc connects the pump inlet of next section; Absorption tower tower top arranges offgas outlet; Absorption tower 2 tower reactor extraction pipeline connects evaporative condenser 10 and first-class heat exchanger 7 successively; First-class heat exchanger outlet connects rectifying column 6 entrance; Rectifying column 6 tower top outlet connects oil-water separation tank, and oil-water separation tank 4 oil phase connects storage tank 9, and the outlet of oil-water separation tank 4 aqueous phase connects heating clamber, and heating clamber connects separation chamber.
Described heating clamber is tubular heat exchanger, and its tube-side inlet is connected with gun barrel, and the outlet of its tube side is directly connected with separation chamber; The shell side inlet of heating clamber is connected with first-class heat exchanger, and the cold liquid port of export of first-class heat exchanger is connected with rectifying column inlet; The shell-side outlet of heating clamber is connected with secondary heat exchanger.
Be described as follows:
The utility model proposes a kind of stages cycle absorption-rectifying and evaporate the device combining VOCs in separation and recovery industrial waste gas, the tower reactor air inlet on absorption tower is connected with the outlet of air-cooled heat exchanger; Absorption tower adopts the design of normal pressure stages cycle, and every section of bottom is provided with liquid collecting distributing disc, and described liquid collecting distributing disc is provided with outlet, is connected respectively with pump inlet with exporting, and absorbent is squeezed into a upper absorber portion through pump and recycled; Absorption tower tower top outlet is for discharging the industrial tail gas after purification; Absorbing tower heads into mouth and is connected with secondary heat exchanger, and on heating clamber, end entrance is connected with gun barrel, and another entrance is connected with first-class heat exchanger, the first-class heat exchanger solvent of still liquid sensible heat heating containing VOCs, and described rectifying column inlet is connected with first-class heat exchanger; Rectifying column tower top outlet is connected with oil-water separation tank; Described tower bottom of rectifying tower outlet is connected with pump; Described heating clamber and separation chamber design for integral type, reduce space, economize on resources.
VOCs gas enters air-cooled heat exchanger and air heat-exchange cools, VOCs gas after heat exchange enters from absorption tower tower reactor, and absorbent enters from absorbing tower jacking, and absorption tower is normal temperature and pressure operation, absorption tower adopts stages cycle design, partially absorbs agent and squeezes into a upper absorber portion through pump and recycle.Purified gas is discharged from absorption tower tower top, absorption tower tower reactor extraction VOCs and solvent mixed liquor, squeeze in rectifying column respectively through evaporative condenser and first-class heat exchanger, rectifying column is decompression operation, rectifying column overhead extraction VOCs, enter in oil-water separation tank, extraction VOCs in oil-water separation tank side recycles, and the VOCs that the extraction of oil-water separation tank low outlet is water-soluble, enters heating clamber and separation chamber carries out water-oil separating, the below extraction VOCs of separation chamber, side recovered water.
Described pre-treatment step mainly cools and filtration treatment the industrial tail gas containing VOCs, cooling means can adopt the partition such as air cooling, liquid cooling to cool or directly wash one kind of multiple combinations in spraying cooling, the condensation of part high boiling point organic compound is reclaimed, pretreated tail gas enters absorption tower tower reactor, absorbs further.
Described VOCs stages cycle absorbs, and adopts absorption tower normal pressure stages cycle design, partially absorbs agent and squeezes into a upper absorber portion through pump and recycle.After regeneration, absorbent enters from most the preceding paragraph, once flows through each section, carries out sufficient quality and energy exchange with the industrial tail gas containing VOCs, containing the absorbent rich solution of VOCs from tower reactor extraction, discharges after the industrial tail gas test passes after purification from first paragraph outlet.
First the absorbent rich solution of described absorption tower tower reactor extraction enters condenser and steam heat exchange, absorbs heat, then enters heat exchanger, and with the heat exchange of tower bottom of rectifying tower high temperature regeneration absorbent lean solution, the absorbent rich solution after intensification enters rectifying column and realizes regeneration; Absorbent lean solution after cooling enters after evaporator heating chamber lowers the temperature further, enters water cooling heat exchanger, with condensed water heat exchange, squeezes into absorption tower after being down to normal temperature with pump by absorption tower first paragraph import; Rectifying goes out VOCs by overhead extraction, enters oil-water separation tank, and oil phase enters VOCs collecting tank, and the aqueous phase containing a small amount of solvable VOCs then enters evaporation heating clamber, carries out evaporation and is separated.
The advantage that the utility model has and good effect are: compared with the prior art, the utility model has the advantage of and provide a kind of efficient stages cycle absorption-rectifying and the technique and the device that evaporate VOCs in separation and recovery industrial waste gas, select boiling point higher in technique, better heat stability and the weak dibutyl phthalate of water imbibition, dioctyl phthalate, one benzyl toluene, dibenzyl toluene or high temperature lubricating wet goods are the mixture of one or more solvents of main solvent is absorbent, while improving the absorption efficiency to VOCs, reduce the loss of absorbent, also reduce the absorption to moisture content in tail gas simultaneously, its water absorption is only the 1%-5% of tail gas water capacity, greatly reduce later stage rectifying and evaporation load.In the utility model, absorption tower adopts the technique of absorbent stages cycle, and make gas-liquid contact more abundant, the gas liquid ratio on absorption tower reaches (500-3000): 1, thus reduces absorbent consumption, decreases system operation cost.The utility model utilizes high temperature sorbent lean solution heat, has carried out evaporating being separated, be provided with secondary heat exchange device simultaneously, fully reclaimed heat between absorption tower and rectifying column rectifying water in products soluble substance.Most importantly the utility model is not discharge after organic matter is become carbon dioxide, but absorption recycling route is adopted to the improvement of VOCs, rationally screened by absorbent, the VOCs rate of recovery can reach more than 99%, and recirculated water, absorbent recycle, realize zero-emission truly completely.
Accompanying drawing explanation
Fig. 1 is a kind of process device structure schematic diagram of the present utility model, and wherein 1 is air-cooled heat exchanger, and 2 is absorption tower, 3 is secondary heat exchanger, 4 is oil-water separation tank, and 5 is overhead condenser, and 6 is rectifying column, 7 is first-class heat exchanger, 81 is heating clamber, and 82 is separation chamber, and 9 is VOCs storage tank, 10 is evaporative condenser, and 11-14 is pump.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the tower reactor air inlet on absorption tower 2 is connected with the outlet of air-cooled heat exchanger 1; Described absorption tower 2 adopts normal pressure stages cycle to design, and every section of bottom is provided with liquid collecting distributing disc, and liquid collecting distributing disc is provided with outlet, is connected respectively with pump 11, pump 12, pump 13 import with exporting; Absorption tower 2 tower top outlet is for discharging the industrial tail gas after purification; Absorption tower 2 tower top entrance is connected with secondary heat exchanger 3; Heating clamber 81 is tubular heat exchanger, and its tube-side inlet is connected with gun barrel 4, and the outlet of its tube side is directly connected with separation chamber 82.The shell side inlet of heating clamber 81 is connected with first-class heat exchanger 7, first-class heat exchanger 7 solvent containing VOCs of rectifying column 6 tower reactor still liquid sensible heat heating from absorption tower 2, the cold liquid port of export of first-class heat exchanger 7 is connected with rectifying column inlet 6, makes the solvent containing VOCs after preheating enter rectifying column 6; Rectifying column 6 tower top outlet is connected with oil-water separation tank 4; The outlet of rectifying column 6 tower reactor is connected with pump 14.
Adopt absorption tower normal pressure stages cycle, absorbent enters from most the preceding paragraph, flows through each section successively, carries out quality and energy exchange with the tail gas containing VOCs, and containing the absorbent rich solution of VOCs from tower reactor extraction, the industrial tail gas after purification is discharged from first paragraph outlet; Each section of absorbent is squeezed into a upper absorber portion through pump and is recycled.
Absorbent is phthalate/senior artificial oil, comprise dibutyl phthalate dioctyl phthalate dinonyl phthalate, a benzyl toluene, dibenzyl toluene, one or more mixed solvents in high temperature grease.
VOCs content and absorbent amount ratio are 1:20 ~ 1:200.
The absorbent rich solution of absorption tower tower reactor extraction first enters condenser and steam heat exchange heats up, and then enters heat exchanger, heats up with the heat exchange of tower bottom of rectifying tower high temperature regeneration absorbent lean solution, and the absorbent rich solution after intensification enters rectifying column and realizes regeneration; Absorbent lean solution after cooling enters after evaporator heating chamber lowers the temperature further, enters water cooling heat exchanger, with condensed water heat exchange, squeezes into absorption tower after being down to normal temperature with pump by absorption tower first paragraph import.
Rectifying column rectifying goes out VOCs by overhead extraction, enters oil-water separation tank, and separating tank extraction oil phase enters VOCs collecting tank, the aqueous phase of VOCs enters evaporation heating clamber, after heating up with the heat exchange of tower bottom of rectifying tower absorbent regeneration lean solution, enter separation chamber, carry out being separated of VOCs and water.
Containing butyl ether (water-soluble) in certain application enterprise exhaust emissions, dimethylbenzene, different fluorine that ketone, total content 5000PPm, needs each component to be down to below 50PPm qualified discharge.
Exhaust emissions amount is 3000m
3/ h, enter air-cooled heat exchanger 1 and carry out heat exchange cooling, enter from absorption tower 2 tower reactor after heat exchange, employing repefral is absorbent, enters from absorption tower 2 tower top, and absorbent flow is 2t/h, absorption tower 2 adopts stages cycle to design, every section of bottom is provided with the liquid collecting distributing disc of band outlet, and its outlet is connected with pump inlet, partially absorbs agent and squeezes into a upper absorber portion through pump and recycle.Absorption tower 2 tower top discharges the industrial tail gas after purification, and gas concentration is less than 50PPm.Absorption tower 2 tower reactor extraction is containing the absorbent rich solution of VOCs, squeeze in rectifying column 6 respectively through evaporative condenser 10 and first-class heat exchanger 7, rectifying column 6 overhead extraction VOCs, wherein containing a small amount of water, enter in oil-water separation tank 4, oil-water separation tank 4 extraction VOCs enters in VOCs storage tank 9 and recycles, the VOCs that the extraction of oil-water separation tank 4 low outlet is water-soluble, enter heating clamber 81 and the heat exchange of rectifying column 6 still liquid, enter separation chamber 82 and carry out water-oil separating, extraction VOCs solvent heavier than water bottom separation chamber 82, separation chamber 82 upper end outlet recovered water, enter evaporative condenser 10 to cool.Rectifying column 6 tower reactor extraction recycling design, through pump 14 squeeze in first-class heat exchanger 7 to from evaporative condenser 10 carry out preheating containing the absorbent rich solution of VOCs after, recycling design enters heating clamber 81 shell side, continue to carry out preheating to the oil water mixture from rectifying column tower top, recycling design enters absorption tower tower top through secondary heat exchanger and recycles, this process can lose sub-fraction solvent, and the solvent of loss supplements with novel solvent.Above technique is compared with conventional suction technology, and energy consumption reduces 50%, the VOCs rate of recovery and reaches more than 99%, and solvent loss is less than 0.1%, and because solvent water absorption rate is low, energy consumption is low, and absorbent consumption is few.
A kind of stages cycle absorption-rectifying of the present utility model combines method and the device of VOCs in separation and recovery industrial waste gas with evaporation, first the absorbent rich solution of absorption tower tower reactor extraction enters condenser and steam heat exchange, absorb heat, then heat exchanger is entered, with the heat exchange of tower bottom of rectifying tower high temperature regeneration absorbent lean solution, the absorbent rich solution after intensification enters rectifying column and realizes regeneration; Absorbent lean solution after cooling enters after evaporator heating chamber lowers the temperature further, enters water cooling heat exchanger, with condensed water heat exchange, squeezes into absorption tower after being down to normal temperature with pump by absorption tower first paragraph import; Rectifying goes out VOCs by overhead extraction, enters oil-water separation tank, and oil phase enters VOCs collecting tank, and the aqueous phase containing a small amount of solvable VOCs then enters evaporation heating clamber, carries out evaporation and is separated.
The utility model a kind of stages cycle absorption-rectifying that is open and that propose combines with evaporation the device carrying out VOCs in separation and recovery industrial waste gas, those skilled in the art are by using for reference present disclosure, suitable change link realizes, although technology of preparing of the present utility model is described by preferred embodiment, person skilled obviously can realize not departing from the utility model content, spirit and scope to change device as herein described or reconfigure.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the art, they are deemed to be included in the utility model spirit, scope and content.
Claims (2)
1. a treating apparatus of VOCs in industrial waste gas, is characterized in that comprising air-cooled heat exchanger, absorption tower, secondary heat exchanger, oil-water separation tank, overhead condenser, rectifying column, first-class heat exchanger, heating clamber, separation chamber, VOCs storage tank, evaporative condenser and pump; It is characterized in that the tower reactor air inlet on absorption tower is connected with the outlet of air-cooled heat exchanger; Absorption tower is stages cycle, and every section of bottom is provided with liquid collecting distributing disc, and the outlet of liquid collecting distributing disc connects the pump inlet of next section; Absorption tower tower top arranges offgas outlet; Absorption tower tower reactor extraction pipeline connects evaporative condenser and first-class heat exchanger successively; First-class heat exchanger outlet connects rectifying column inlet; Rectifying column tower top outlet connects oil-water separation tank, and oil-water separation tank oil phase connects storage tank, and the outlet of oil-water separation tank aqueous phase connects heating clamber, and heating clamber connects separation chamber.
2. device as claimed in claim 1, it is characterized in that heating clamber is tubular heat exchanger, its tube-side inlet is connected with gun barrel, and the outlet of its tube side is directly connected with separation chamber; The shell side inlet of heating clamber is connected with first-class heat exchanger, and the cold liquid port of export of first-class heat exchanger is connected with rectifying column inlet; The shell-side outlet of heating clamber is connected with secondary heat exchanger.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344206A (en) * | 2015-11-11 | 2016-02-24 | 天津天清环保科技股份有限公司 | Method and device for processing VOCs in industrial waste gas |
| CN105920877A (en) * | 2016-05-24 | 2016-09-07 | 河南银金达彩印股份有限公司 | VOCs recovering organic solvent purification device and process |
| CN109529396A (en) * | 2019-01-14 | 2019-03-29 | 哈尔滨蔚蓝环保设备制造有限公司 | Organic waste gas treatment device and processing method |
| CN112221310A (en) * | 2020-09-26 | 2021-01-15 | 安徽金禾实业股份有限公司 | Pressurization treatment method for sucralose chlorination tail gas |
| CN112221311A (en) * | 2020-09-26 | 2021-01-15 | 安徽金禾实业股份有限公司 | Method for treating sucralose chlorination tail gas |
-
2015
- 2015-11-11 CN CN201520901758.2U patent/CN205216516U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344206A (en) * | 2015-11-11 | 2016-02-24 | 天津天清环保科技股份有限公司 | Method and device for processing VOCs in industrial waste gas |
| CN105920877A (en) * | 2016-05-24 | 2016-09-07 | 河南银金达彩印股份有限公司 | VOCs recovering organic solvent purification device and process |
| CN105920877B (en) * | 2016-05-24 | 2018-08-31 | 河南银金达彩印股份有限公司 | A kind of VOCs recycling Purifying Device for Organic Solvent and technique |
| CN109529396A (en) * | 2019-01-14 | 2019-03-29 | 哈尔滨蔚蓝环保设备制造有限公司 | Organic waste gas treatment device and processing method |
| CN109529396B (en) * | 2019-01-14 | 2023-09-19 | 哈尔滨蔚蓝环保设备制造有限公司 | Organic waste gas treatment device and treatment method |
| CN112221310A (en) * | 2020-09-26 | 2021-01-15 | 安徽金禾实业股份有限公司 | Pressurization treatment method for sucralose chlorination tail gas |
| CN112221311A (en) * | 2020-09-26 | 2021-01-15 | 安徽金禾实业股份有限公司 | Method for treating sucralose chlorination tail gas |
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