CN101576097B - Method and system for pumping and processing tail gas of polyester device by jet ejector - Google Patents
Method and system for pumping and processing tail gas of polyester device by jet ejector Download PDFInfo
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- CN101576097B CN101576097B CN 200910086413 CN200910086413A CN101576097B CN 101576097 B CN101576097 B CN 101576097B CN 200910086413 CN200910086413 CN 200910086413 CN 200910086413 A CN200910086413 A CN 200910086413A CN 101576097 B CN101576097 B CN 101576097B
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Abstract
The invention relates to a method and a system using the method for pumping and processing the process tail gas (containing acetaldehyde called EA for short) of a polyester (PET) device by a jet reactor, and the method and the system are used for processing the process tail gas organically exhausted by the polyester device. The method adopts the jet ejector to convey the process tail gas, and transmits the collected tail gas to the suction inlet of the jet ejector; and the tail gas is sucked in the jet of the jet ejector and sent to an incinerator for incineration treatment. The system comprises a jet ejector and an incinerator, adopts a compressed air or pressure steam as a jet source, and stabilizes the suction inlet pressure of the tail gas by controlling the flux of the jet medium, thus realizing changing the conveying quantity of the jet ejector with the change of the tail gas quantity. The system has simple structure, low investment and running cost, is safe and reliable and has good treatment effect.
Description
Technical field
The present invention relates to a kind of vent gas treatment technology, particularly a kind ofly contain method that the process tail gas of acetaldehyde handles and the processing system that adopts this method, belong to environmental technology field with jet ejector suction polyester device.
Background technique
In production of polyester, acetaldehyde is higher in the tail gas of ethylene glycol separator overhead condenser and the tail gas of polycondensation system, to call high concentration tail gas in the following text.Acetaldehyde is lower in the tail gas of the tail gas of polycondensation system liquid sealing groove, slurry preparation groove etc., to call low density tail gas in the following text.Acetaldehyde in the above-mentioned tail gas has all surpassed the emission standard of national qualification, and with present existing technology, still can't be reduced to the acetaldehyde in the above-mentioned tail gas in the emission standard.Burn above-mentioned tail gas and can stop pollution, and can reduce the fuel consumption of incineration device atmosphere.
The processing mode that adopts in producing at present mainly contains two kinds: the one, adopt the blower fan mode of movement, and tail gas is directly sent into the heating agent stove burn; The 2nd, the mode with low temperature water drip washing captures EA earlier, and the tail gas after the drip washing is entered atmosphere environment, and the scouring water that contain the EA pollutant are handled through the stripping mode, and the waste gas that again stripping is formed is sent into incinerator and handled.
Because polyester device waste gas is carried as adopting blower fan, then the restriction of the type selecting of blower fan is more: the one, and EA belongs to B-grade in the first class's class fire risk gas, need select impeller no-spark type explosion-proof fan for use.The 2nd, because waste gas also contains the organic acidity material, certain corrosivity is arranged, cause the material of blower fan need adopt corrosion resistant stainless steel material.The 3rd, the tail gas amount changes with the production load variations of polyester device, therefore need select frequency conversion fan for use, as selects for use the non-frequency blower fan then to need more a large amount of benefit wind.More than 3 cause the cost of blower fan higher, in addition, need increase table of equipment because of blower fan need overhaul, cause flow process complicated, and further raise equipment investment.And there is viewpoint to think that steam stripped flow process is carried safer than blower fan behind the water wash; Therefore the mode that stripping burns after the employing water washing at present is comparatively general; But because the manufacturing process of this processing mode is unreasonable, needs to consume a large amount of cold washing water and strippings and use steam, operating cost is higher; Because the purification efficiency of water washing is relatively low; Tail gas after the washing can not satisfy environmental requirement fully, also because low density tail gas (tail gas at liquid seal trough and the slurry preparation groove place) operating mode of discharging approaches the operating mode of eluting column cat head, can not handle the low density tail gas of discharging effectively in addition.Therefore, need develop a kind of convenient, treatment technology efficiently.
Summary of the invention
In view of there are above-mentioned some shortcomings in existing tail gas of polyester device processing method, the purpose of this invention is to provide a kind of safe, simple, reliable exhaust gas treating method, and a kind of processing system that adopts this method is provided.
Technological scheme of the present invention is: a kind of method of handling with jet ejector suction tail gas of polyester device; It adopts jet ejector to carry out the conveying of tail gas; The tail gas of collecting is inserted the suction port of jet ejector; Tail gas is sucked in the jet of jet ejector, and send into incineration device and carry out burning disposal.
Said tail gas is all discharge tail gas in a organized way of polyester device, comprises high concentration tail gas and/or the not tractable low density tail gas of existing vent gas treatment flow process.
Can adopt pipeline or tail gas jar centralized collection, form the tail gas source that tail gas is provided to the jet lead-jetting device each exhaust emissions point tail gas.
Can adopt pressurized air or steam in the jet lead-jetting device, to form jet, said compressed-air actuated specification is 0.3～0.6MPa.
Can control the inlet pressure of said jet ejector through the flow of regulating pressurized air or steam, thereby realize handling fully all purposes of discharge tail gas in a organized way of polyester device.
A kind of system that handles with jet ejector suction tail gas of polyester device; Comprise jet ejector and incineration device; The jet import of said jet ejector connects the jet source pipeline of sending into jet media; The suction port of jet ejector connects the tail gas source capsule road of sending into tail gas, and jet exit connects the incinerated matter import of incineration device.
The control loop of said jet ejector adopts the flow of regulating jet media to control suction pressure, and therefore, the Processing capacity of jet ejector can be regulated with the tail gas amount that polyester device produces.
Said jet source pipeline is connected with source of compressed air or steam source.
On the said jet source pipeline automatic regulating valve can be set, said automatic regulating valve can be provided with the control loop that its aperture and flow are controlled.
Can be provided with flow detector on the said jet source pipeline and/or on the said tail gas source capsule road, described control loop can be inserted in the output line road of said flow detector.
Be provided for collecting the pipeline that polyester device discharges tail gas in a organized way; Form described tail gas source capsule road; Perhaps be provided with and collect the polyester device tail gas jar of discharge tail gas in a organized way, as described tail gas source capsule road, can collect various discharge tail gas in a organized way through these pipelines or offgas duct thus with its discharge conduit; And can collect other tail gas as required, realize to handle all purposes of discharge tail gas and other tail gas in a organized way.
Because the present invention adopts jet ejector to carry out the conveying of tail gas, not only transfer efficiency is high, and jet ejector itself is not charged, and does not have rotating component, can not occur therefore having eliminated corresponding potential safety hazard because of spark causes the tail gas blast; And it is simple in structure, does not have moving part, helps increasing the service life; Because the jet source that can adopt steam or pressurized air etc. to be easy to obtain in the production of polyester place need not carry out water washing, therefore saved the water of lot of consumption under the existing technology, can lower cost of production significantly; Because tail gas is directly burned, so technological process is simple, helps reducing investment and operating cost, and can well be connected with the incineration device under the existing technology, helps the difficulty that reduces to apply, is convenient to the user and accepts, and is convenient to personnel operation; Because whole tail gas are directly burned; Because the combustion performance of the major pollutants EA in the tail gas is fine, and does not produce secondary pollution in the burning process basically, thus the present invention not only purification efficiency is very high; But also be adapted to the tail gas under the various operating modes; Can in the production of polyester all be discharged tail gas in a organized way and together collect and handle, avoid under the existing technology low density tail gas operating mode because of discharging, greatly improve Processing capacity tail gas of polyester device with the close phenomenon that can't handle of drip washing cat head operating mode; Greatly reduced the influence of tail gas of polyester device, thereby realized the cleaner production of polyester device atmosphere environment.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Referring to Fig. 1, the present invention adopts jet ejector to carry out the conveying of tail gas, can whole tail gas that polyester device produces all be collected; Insert the suction port 10 of jet ejectors 11 through tail gas source capsule road 5, after negative pressure (forming negative pressure with respect to tail gas source pressure get final product) the suction effect through jet sucked jet ejector with tail gas, tail gas together came out from the outlet 3 of jet ejector after with the jet media mixing; The gas that inserts incineration device 2 through outlet conduit 1 burns material inlet; Introduce in the incineration device thus and burn, make pollutant such as EA become carbon dioxide and water etc., the flue gas that incineration device produces enters atmosphere through flue gas purification system; Because the major pollutants in the tail gas of polyester device are EA; It has good burning performance, and sufficient combustion does not produce secondary pollution basically; Therefore incineration device itself adopts under the situation of clean fuel and/or clean combustion technology, and the flue gas of incineration device is very low to the pollution level of air.Therefore on the whole, the present invention can reduce polyester tail gas or other the similar waste gas adverse effect to atmosphere environment significantly.
Said jet ejector can adopt existing technology, for example common all gases Jet injector.
Under the situation of handling polyester tail gas; Reality according to production of polyester; The jet source of said jet ejector can adopt steam or pressurized air usually; The jet import that jet source pipeline 8 connects jet ejectors is passed through in steam pipeline/source or compressed air line/source 7,, tail gas is sucked in the jet ejector mix with jet media so that in jet ejector, form jet.According to claimant's experiment, jet media with compressed-air actuated be good, not only operating cost is low, and helps burning.
The industrial steam that said steam can adopt production of polyester to use is with equipment investment and attenuating operating cost.
The source of compressed air that said pressurized air can adopt production of polyester to use.
Can on said jet source pipeline and said tail gas source capsule road, flow detector be set, said flow detector can adopt flowmeter suitable under the existing technology, to detect and to obtain real-time data on flows.
Can collect or be provided for collecting all tail gas of polyester device and the tail gas jar of stable tail gas with pipeline, form tail gas source 6.Because of the pressure of each exhaust outlet point of polyester device is normal pressure, therefore, directly collect the steady production that all tail gas do not influence polyester device with pipeline, the tail gas of collection is directly sent into the suction port of jet ejector.
Can on said jet source pipeline, automatic regulating valve 9 be set; Said automatic regulating valve connects control loop; So that aperture or jet media flow to modulating valve are controlled; The control loop on the jet source pipeline is inserted on the output line road of the pressure-detecting device on the said exhaust pipe, can realize the control to the tail gas suction pressure thus, its control mode can adopt suitable existing technology.
Under embodiment shown in Figure 1; With polyester device all in a organized way discharge tail gas collect and to deliver to the jet ejector suction port, utilize pressurized air to spray the negative pressure that produced with the tail gas suction and send into burning in incineration device (heating agent stove) in the jet ejector high speed.The inlet pressure of jet ejector can be controlled through regulating compressed-air actuated flow, to the preferred 10kpa of peak suction of tail gas formation.Under existing production of polyester condition; It is that (this and the compressed-air actuated common-use size of polyester factory adapt 0.6MPa that compressed-air actuated specification can adopt; Help utilizing existence conditions), for the polyester device of producing 200000 tons of scales per year, compressed-air actuated consumption is: 150kg/h.
Concrete advantage of the present invention mainly shows:
1. safer, more reliable
Compare with the blower fan conveying, jet ejector has been avoided rotating component, has reduced potential safety hazard; And it is simple in structure; Basically need not to safeguard and maintenance compared with prior art more simple and reliable (blower fan need be safeguarded and overhaul, and eluting column then needs regularly to clean filler);
2. more environmental protection
Compare with the water wash mode, jet ejector can be delivered to the heating agent stove with all tail gas of polyester device and burn, and does not have exhaust emissions when having realized ordinary production.Meet the domestic environmental requirement of more and more paying attention to, meet the trend that polyester device is realized cleaner production.
3. more economical (is example with the polyester device of producing 200000 tons of scales per year)
At first from the equipment investment expense, ten thousand yuan of the about 3-4 of jet ejector, the cost of equipment of blower fan then are more than six times of exhaust ejector; And the equipment investment of water wash mode is more than five times of jet ejector (expenses that do not comprise the increase-volume of stripping system), sees the following form.
Secondly; The operating cost that compares these three kinds of exhaust gas treating methods again; Operating cost comprises the Maintenance and Repair expense of Utilities consumption, depreciation of equipment and equipment, and the depreciation of equipment and its cost are linear, and the Maintenance and Repair expense of equipment and the type of equipment are closely related; Obviously, the present invention obviously is less than the expense with blower fan and water wash processing mode in this expense aspect two.Compare the expense that Utilities consumes below emphatically; Comparative result sees the following form, and (with the polyester device of producing 200000 tons of scales per year is that example is calculated; Operating time in year was by 330 days); Can find out from the comparative result of following table, the power consumption appropriate litigation fees of Utilities consumption costs of the present invention and blower fan, be adopt the water wash mode the Utilities consumption costs 12.3%.
Annotate: in the above-mentioned comparison, tail gas amount benchmark is: 730m
3/ h
Claims (8)
1. method of handling with jet ejector suction tail gas of polyester device; It is characterized in that it adopts jet ejector to carry out the conveying of tail gas; The jet source pipeline of jet media is inserted the jet import of jet ejector, the tail gas of collecting is inserted the suction port of jet ejector, tail gas is sucked in the jet of jet ejector; And send into incineration device and carry out burning disposal; Simultaneously on said jet source pipeline, automatic regulating valve is set, said automatic regulating valve is provided with the control loop that its aperture and flow are controlled, and pressure-detecting device is set sending on the tail gas source capsule road of said tail gas; The control loop on the jet source pipeline is inserted on the output line road of said pressure-detecting device, to realize control to the tail gas suction pressure.
2. the method for handling with jet ejector suction tail gas of polyester device as claimed in claim 1 is characterized in that said tail gas comprises the high concentration tail gas and/or the low density tail gas of discharging in a organized way that polyester device produces.
3. according to claim 1 or claim 2 the method for handling with jet ejector suction tail gas of polyester device; It is characterized in that adopting pressurized air or steam in the jet lead-jetting device, to form jet, the specification of said pressurized air or steam is 0.3～0.6MPa.
4. the method for handling with jet ejector suction tail gas of polyester device as claimed in claim 3; It is characterized in that suction pressure, thereby realize handling fully all discharge tail gas in a organized way of polyester device through the said jet ejector of flow control of regulating pressurized air or steam.
5. system that handles with jet ejector suction tail gas of polyester device; Comprise jet ejector and incineration device; The jet import of said jet ejector connects the jet source pipeline of sending into jet media; The suction port of jet ejector connects the tail gas source capsule road of sending into tail gas, and jet exit connects the pipeline of the incinerated matter import of incineration device, on the said jet source pipeline automatic regulating valve is set; Said automatic regulating valve is provided with the control loop that its aperture and flow are controlled; Said tail gas source capsule road is provided with pressure-detecting device, and the control loop on the jet source pipeline is inserted on the output line road of said pressure-detecting device, to realize the control to the tail gas suction pressure.
6. the system that handles with jet ejector suction tail gas of polyester device as claimed in claim 5 is characterized in that the jet source pipeline connects source of compressed air or steam source.
7. the system that handles with jet ejector suction tail gas of polyester device as claimed in claim 6; It is characterized in that on the said jet source pipeline and/or said tail gas source capsule road is provided with flow detector, described control loop is inserted on the output line road of said flow detector.
8. the system that handles with jet ejector suction tail gas of polyester device as claimed in claim 7; It is characterized in that being provided with and be used to collect the pipeline that polyester device discharges tail gas in a organized way; Form described tail gas source capsule road; Perhaps be provided with and collect the polyester device tail gas jar of discharge tail gas in a organized way, with its discharge conduit as described tail gas source capsule road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910086413 CN101576097B (en) | 2009-05-31 | 2009-05-31 | Method and system for pumping and processing tail gas of polyester device by jet ejector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910086413 CN101576097B (en) | 2009-05-31 | 2009-05-31 | Method and system for pumping and processing tail gas of polyester device by jet ejector |
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| CN101576097A CN101576097A (en) | 2009-11-11 |
| CN101576097B true CN101576097B (en) | 2012-07-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563667B (en) * | 2011-12-23 | 2015-04-08 | 中国航天科技集团公司第六研究院第十一研究所 | Turbojet injecting incineration device and incineration method |
| CN104061192A (en) * | 2013-03-18 | 2014-09-24 | 宁夏嘉翔自控技术有限公司 | Ventilating equipment for cleaning and maintenance of railway oil tanker |
| CN104976627A (en) * | 2015-07-20 | 2015-10-14 | 河南万安油气设备工程有限公司 | Smoke-abatement efficient ground torch combustor |
| CN109268845B (en) * | 2018-09-14 | 2020-03-24 | 乔治洛德方法研究和开发液化空气有限公司 | Tail gas treatment device for providing solid fuel air conveying |
| CN109058764A (en) * | 2018-09-25 | 2018-12-21 | 中国石油化工股份有限公司临汾煤层气分公司 | A method of simplifying coal bed gas gathering and transportation technology using Venturi transmission ejector |
| CN109812705A (en) * | 2018-12-29 | 2019-05-28 | 北京建筑大学 | Energy saving and environment friendly caster two cold room steam discharging device and method |
| CN113874994A (en) * | 2019-06-04 | 2021-12-31 | 东京毅力科创株式会社 | Substrate temperature adjusting device and substrate temperature adjusting method |
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| CN1095527C (en) * | 1997-06-18 | 2002-12-04 | 金川有色金属公司 | Device for removing oil mist and oil smoke |
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| CN101058409A (en) * | 2006-04-20 | 2007-10-24 | 兰州大学 | Method of mixing acid |
| CN200983804Y (en) * | 2006-04-06 | 2007-12-05 | 河南未来机电工程有限公司 | Mobile type bergmeal powder gun |
| EP1870146A2 (en) * | 2006-01-04 | 2007-12-26 | General Electric Company | Reduced boundary layer separation steam jet air ejector assembly and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095527C (en) * | 1997-06-18 | 2002-12-04 | 金川有色金属公司 | Device for removing oil mist and oil smoke |
| CN1387009A (en) * | 2001-05-18 | 2002-12-25 | 梁嘉麟 | Jet-type splittable cooking fume exhauster without contact of cooking fume with fan |
| EP1870146A2 (en) * | 2006-01-04 | 2007-12-26 | General Electric Company | Reduced boundary layer separation steam jet air ejector assembly and method |
| CN200983804Y (en) * | 2006-04-06 | 2007-12-05 | 河南未来机电工程有限公司 | Mobile type bergmeal powder gun |
| CN101058409A (en) * | 2006-04-20 | 2007-10-24 | 兰州大学 | Method of mixing acid |
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Effective date of registration: 20170125 Address after: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee after: China Kunlun Engineering Co., Ltd. Address before: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee before: China Textile Industrial Engineering Institute |
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Effective date of registration: 20201221 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Address before: 100037 No. 21, shining road, Beijing, Haidian District Patentee before: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. |