CN204154563U - PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system - Google Patents
PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system Download PDFInfo
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- CN204154563U CN204154563U CN201420585321.8U CN201420585321U CN204154563U CN 204154563 U CN204154563 U CN 204154563U CN 201420585321 U CN201420585321 U CN 201420585321U CN 204154563 U CN204154563 U CN 204154563U
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Abstract
The utility model relates to a kind of PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system, comprise interconnective sampling unit and cooling unit, described sampling unit is provided with the sampling probe for gathering sample gas from process pipeline, connect isolation valve and reduction valve successively below, sampling unit bleeder line is provided with between described isolation valve and described reduction valve, described cooling unit comprises the washing spray tank connected successively, double-tube heat exchanger and vortex cooler unit, the lime set holding tank of described washing spray tank and described moisture trap is provided with the upper curved fluid-tight bleeder line with certain altitude, the fluid-tight buffer tank run-down pipe with certain altitude is housed in the fluid-tight buffer tank of described vortex cooler unit.The utility model has carried out three grades of voltage stabilizings and three grades of cooling processing to sample gas, has adapted to the requirement of in-line analyzer, is mainly used in the online sample gas collection of PTA Equipment oxidation reaction exhaust gas composition, pre-service, conveying and discharge.
Description
Technical field
The utility model relates to a kind of PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system, is mainly used in the online sample gas collection of PTA Equipment oxidation reaction exhaust gas composition, pre-service, conveying and discharge.
Background technology
In pure terephthalic acid producing device, oxidation reaction is the core of whole technological process, the severe degree of reaction is related to the quality of product quality and the height of plant energy consumption, oxidation reaction exhaust gas composition is an important indicator that can reflect oxidation reaction severe degree, therefore the component of on-line real time monitoring oxidation reaction tail gas, to the safety of PTA Equipment, stable, High-efficient Production is most important, and the core of on-line gas analysis system and key are exactly sample gas pretreating system, the design and production process conditions of sample gas pretreating system and applied environment is only had to mate proper, combine perfect, could ensure that on-line analysis instrument can be continuous, stable, accurately, reliably, long-term work.
PTA Equipment oxidation reaction tail gas has high temperature, high pressure, severe corrosive, carries the features such as the easy crystallization of material secretly, and therefore the effect of the sample gas pretreating system of oxidation reaction exhaust gas composition on-line checkingi is just more important.At present, in PTA Equipment, the sample gas pre-service of oxidation reaction exhaust gas composition on-line checkingi adopts single-stage or the method such as the decompression of multi-step pressure reduction valve, spray removal of impurities cooling usually, effectively can not stablize the impurity content of sample atmospheric pressure and control sample temperature degree and sample gas, cause that the maintenance of on-line analysis instrument is frequent, malfunction and failure rate is high, process units frequently stops because of the wrong report of on-line analysis instrument or fault, and economic loss is huge.
Utility model content
The utility model object is for having high temperature, high pressure, severe corrosive, carrying the PTA Equipment oxidation reaction tail gas of the features such as the easy crystallization of material secretly, there is provided a whole set of easy and effective sample gas pretreating system, to overcome the above-mentioned defect of prior art, meet the request for utilization of on-line analysis instrument better.
The technical scheme that the utility model adopts: a kind of PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system, comprise interconnective sampling unit and cooling unit, described sampling unit and cooling unit are respectively equipped with respective stable-pressure device, described sampling unit is provided with the sampling probe for gathering sample gas from process pipeline, and after described cooling unit is provided with cooling, sample gas exports.
Preferably, described sampling unit is also provided with isolation valve and reduction valve, described sampling probe adopts top to stretch into type with the rod-type of certain angle groove and leads directly to sampling probe, the end of described sampling probe connects the import of isolation valve, the outlet of described isolation valve connects the import of reduction valve, the outlet of described reduction valve connects the sample gas import of described cooling unit by sampling unit export pipeline, described reduction valve forms the stable-pressure device (first order stable-pressure device of system) of described sampling unit, within sample gas is tentatively decompressed to 100kPa (G) by described reduction valve.
Preferably, the pipeline be connected is connected with sampling unit bleeder line between described isolation valve with described reduction valve, described sampling unit bleeder line is provided with sampling unit bleeder line cutting-off valve.
Preferably, described cooling unit adopts the cooling unit with three grades of coolings, comprise the washing spray tank connected successively, double-tube heat exchanger and vortex cooler unit, the gas vent of described washing spray tank connects the exothermic medium import of described double-tube heat exchanger, moisture trap is provided with after described double-tube heat exchanger, the exothermic medium outlet of described double-tube heat exchanger connects the import of described moisture trap, the gas vent of described moisture trap connects the import of described vortex cooler unit by sample gas long-distance transmissions pipeline, the end of described sample gas long-distance transmissions pipeline is provided with sample gas long-distance sand transport stop valve, the outlet of described vortex cooler unit connects the import of membrane filter by pipeline, sample letter shoot line after the outlet connection pre-service of described membrane filter, sample gas outlet after the outlet of described membrane filter and described cooling.
Preferably, the leakage fluid dram of described washing spray tank and the leakage fluid dram of described moisture trap are all by fluid-carrying lines access lime set holding tank, described lime set holding tank is provided with the upper curved fluid-tight bleeder line with certain altitude, and described lime set holding tank and described curved fluid-tight pipeline form a stable-pressure device (second level stable-pressure device of system) of cooling unit jointly.
Preferably, the height liquid seal of described curved fluid-tight bleeder line is 8-10 rice, to ensure the second level stable-pressure device of system by the pressure stability of sample gas within 80-100kPa (G).
Preferably, the condensed fluid leakage fluid dram of described vortex cooler unit connects fluid-tight buffer tank by condensate discharge pipeline, the fluid-tight buffer tank run-down pipe with certain altitude is housed in described fluid-tight buffer tank, the liquid discharge pipe of described fluid-tight buffer tank run-down pipe and described fluid-tight buffer tank, near tank bottom below the liquid level that the condensate discharge pipeline of described vortex cooler unit inserts described fluid-tight buffer tank, described fluid-tight buffer tank and described fluid-tight buffer tank run-down pipe form another stable-pressure device (third level stable-pressure device of system) of described cooling unit.
Preferably, the mouth of pipe of described fluid-tight buffer tank run-down pipe, higher than 0.8-1.0 rice at the bottom of the tank of described fluid-tight buffer tank, is less than 8-10kPa (G) to make the pressure of follow-up system sample gas.
Preferably, after described pre-service, the end of sample letter shoot line is divided into two-way, and a road connects in-line analyzer through in-line analyzer flowmeter, and another road is provided with the emptying flow meter for regulating sample gas discharge capacity.
Preferably, after described pre-service, sample letter shoot line is also by demarcation T-valve access demarcation gas pipeline, and described demarcation gas pipeline connects the outlet of switch three-way valve, two imports of described switch three-way valve connect respectively range source of the gas and zero point source of the gas.
The beneficial effects of the utility model: because described sampling unit and cooling unit are all provided with respective stable-pressure device, in the process of sampling and cool, achieve decompression and voltage stabilizing step by step, effectively reduce and stabilize the sample atmospheric pressure entering in-line analyzer; Because cooling unit can adopt three grades of coolings, cooperatively interact, effectively reduce and stabilize the sample temperature degree entering in-line analyzer, thus while maintenance water washing cleaning, the sample atmospheric pressure of in-line analyzer and the defect of temperature instability is entered under effectively overcoming prior art, be conducive to the good working state keeping in-line analyzer, be conducive to reducing malfunction and failure rate, reduce the frequency of maintenance of instrument, reducing and frequently stop because of in-line analyzer wrong report or fault, avoiding the tremendous economic loss brought because frequently stopping.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
See Fig. 1, sampling unit uses top to stretch into type with the rod-type of the Φ 6mm titanium alloy material of certain angle groove and leads directly to sampling probe 1, during use, the top of sampling probe is inserted to the center of process pipeline to take the representational sample gas of most, the groove medium flow direction dorsad of probe tip, avoids entrained solid Particle Blocking to pop one's head in while the collection of quickening sample gas.
The type that stretches into described rod-type leads directly to sampling probe preferably with reinforced protective casing, makes probe can keep enough intensity under the media impingement of high temperature high pressure and hig flow speed.
The groove angle that the type that stretches into described rod-type leads directly to sampling probe top can have prior art setting, under normal circumstances should not be too little, generally can be chosen as 45 degree.
The type that stretches into described rod-type leads directly to the end of sampling probe with isolation valve 2, and can isolate sampling media online, handled easily personnel safeguard whole system.Reduction valve is set after described isolation valve, within sample gas is tentatively decompressed to 100kPa (G) by reduction valve 4, ensures the pressure security of follow-up pretreatment unit and the cost of effective reduction pretreatment system.
Between described isolation valve and described reduction valve, be provided with corresponding cutting-off valve 3.1 (sampling unit bleeder line cutting-off valve) and bleeder line (sampling unit bleeder line), use during to maintain easily.
After the preliminary voltage stabilizing of described reduction valve, sample gas, through Φ 6mm titanium alloy texture pipeline (sampling unit export pipeline) transmission, enters cooling unit.First sample gas enter washing spray tank 5 (in this case, the import of this washing spray tank is the sample gas import of cooling unit), the mode of washing filtering is adopted in washing spray tank, effective removing solid particle wherein, acetic acid, Celfume and other impurity, and carried out preliminary cooling simultaneously, washing spray process ensure that clean, the representative and component to be measured of sample gas after treatment can not be affected.
Before washing spray, all transfer lines, pipe valve joint etc. contacted with sample gas all use titanium alloy material, and after washing spray, all respective element all use 316L stainless steel.
Sample gas after washing spray cleaning and cooling enters double-tube heat exchanger 6 and carries out second level cooling.Sample gas is pipe flowing in described double-tube heat exchanger, as the cold water of heat-absorbing medium in the sleeve pipe annular space of described double-tube heat exchanger with sample circulation of vital energy in the wrong direction stream.Two media is through abundant heat exchange, and the washing and spraying tank 5 pairs of sample gas that anhydrate again of the cold water after heat exchange are washed, to reduce water consumption.
Sample gas after described double-tube heat exchanger carries out second level cooling, enter moisture trap 7 and carry out gas-water separation, so that by the fluid separation applications of carrying secretly in sample gas, the liquid that isolated liquid is discharged with washing spray tank together enters lime set holding tank 8 after respective fluid-carrying lines.
Described lime set holding tank 8 and the upper curved fluid-tight bleeder line 9 with certain altitude constitute the second level stable-pressure device of system jointly, sample gas after the preliminary voltage stabilizing of reduction valve of sampling unit passes through this second level stable-pressure device again, realizes pressure stability by water seal.
Described curved fluid-tight bleeder line generally should according to on-site actual situations, and its height liquid seal h1 at least should ensure 8-10 rice, to ensure second level voltage stabilizing by the pressure stability of sample gas within 8-100kPa (G).
Sample gas is after the stable-pressure device of the second level, and employing diameter is that the 316L stainless steel pipeline (sample gas long-distance transmissions pipeline) of 6mm carries out long-distance transmissions.
Keep certain pressure and adopt Φ 6mm pipeline to carry out the transmission of sample gas, fundamental purpose is to ensure that the response time of whole pretreatment system meets technique on-line analysis requirement; Meanwhile, be the pressure security in order to ensure whole pretreatment system by pressure stability fundamental purpose within 80-100kPa (G).
Outlet bottom described lime set holding tank 8 connects corresponding lime set holding tank discharge cutting-off valve 3.2 and lime set holding tank bleeder line, uses during to maintain easily.
The cold water supplying pipe of described double-tube heat exchanger also can be provided with corresponding cutting-off valve 3.3, so that control and operation.
The end of described sample gas long-distance transmissions pipeline is provided with corresponding sample gas long-distance transmissions cutting-off valve 3.4, uses during to maintain easily.
Sample gas after long-distance transmissions enters vortex cooler unit 10 and carries out third level cooling, the temperature of sample gas is made to be reduced to normal temperature, make the condensable gas in sample gas continue condensation to discharge, ensure that the sample gas entering on-line analysis instrument can not condense, vortex cooler in vortex cooler unit and corollary apparatus and unit structure can according to prior aries, and its instrument wind is provided with instrument wind air feed cutting-off valve 3.5 for airduct.
The condensed fluid that described vortex cooler unit 10 is discharged flows into fluid-tight buffer tank 11, fluid-tight buffer tank run-down pipe is housed in described fluid-tight buffer tank, the mouth of pipe of this run-down pipe should have the certain altitude h2 at the bottom of tank exceeding described fluid-tight buffer tank, sample gas passes through to insert the bleeder line of below described fluid-tight buffer tank lime set liquid level near tank bottom, to realize third level voltage stabilizing.
Generally, the run-down pipe mouth of pipe in described fluid-tight buffer tank is 0.8-1.0 rice higher than the height h2 at the bottom of tank, and the sample atmospheric pressure stablizing follow-up system is less than 8-10kPa (G), ensures use safety and the constant pressure of in-line meter.
Sample gas after above-mentioned three grades of voltage stabilizings and three grades of coolings is by membrane filter 12, filter the Trace Water Vapor of carrying secretly in sample gas, usual filtering accuracy may be selected to be 0.1-0.3 μm, the bottom leakage fluid dram of membrane filter is connected with membrane filter Drainage pipe, described membrane filter Drainage pipe is arranged membrane filter Drainage pipe cutting-off valve 3.6 and controls.
The sample gas after the Trace Water Vapor of carrying secretly in gas is removed through described membrane filter 12, in-line analyzer sent into by sample letter shoot line after pretreatment, before entering in-line analyzer, by the discharge capacity regulating the flowmeter 14 on blow-down pipe to regulate sample gas, improve sample gas velocity, thus accelerate system response time, ensure the time requirement of technique on-line checkingi, and sample gas is before entering in-line analyzer, after the pre-treatment sample letter shoot line also should arrange in-line analyzer flowmeter 15, so that metering and adjustment.
After the pre-service connecting in-line analyzer, sample letter shoot line accesses a demarcation gas pipeline by demarcation T-valve 13.1, the gas source entering on-line analysis instrument is switched by this T-valve, and demarcation with two imports of the switch three-way valve 13.2 on gas pipeline connect respectively range source of the gas and zero point source of the gas, the switching of demarcation pipeline is entered, to realize the demarcation to described on-line analysis instrument for these two kinds of gases.
Each optimization technique means disclosed in the utility model, unless otherwise indicated and optimization technique means be outside the further restriction of another technological means, all can combination in any, form some different technical schemes.
Claims (10)
1. a PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system, comprise interconnective sampling unit and cooling unit, it is characterized in that described sampling unit and cooling unit are respectively equipped with respective stable-pressure device, described sampling unit is provided with the sampling probe for gathering sample gas from process pipeline, and after described cooling unit is provided with cooling, sample gas exports.
2. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 1, it is characterized in that described sampling unit is also provided with isolation valve and reduction valve, described sampling probe adopts top to stretch into type with the rod-type of certain angle groove and leads directly to sampling probe, the end of described sampling probe connects the import of isolation valve, the outlet of described isolation valve connects the import of described reduction valve, the outlet of described reduction valve connects the sample gas import of described cooling unit by sampling unit export pipeline, described reduction valve forms the stable-pressure device of described sampling unit.
3. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 2, it is characterized in that the pipeline that is connected between described isolation valve with described reduction valve is connected with sampling unit bleeder line, described sampling unit bleeder line is provided with sampling unit bleeder line cutting-off valve.
4. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 1, it is characterized in that described cooling unit adopts the cooling unit with three grades of coolings, comprise the washing spray tank connected successively, double-tube heat exchanger and vortex cooler unit, the gas vent of described washing spray tank connects the exothermic medium import of described double-tube heat exchanger, moisture trap is provided with after described double-tube heat exchanger, the exothermic medium outlet of described double-tube heat exchanger connects the import of described moisture trap, the gas vent of described moisture trap connects the import of described vortex cooler unit by sample gas long-distance transmissions pipeline, the end of described sample gas long-distance transmissions pipeline is provided with sample gas long-distance sand transport stop valve, the outlet of described vortex cooler unit connects the import of membrane filter by pipeline, sample letter shoot line after the outlet connection pre-service of described membrane filter.
5. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 4, it is characterized in that the leakage fluid dram of described washing spray tank and the leakage fluid dram of described moisture trap all access lime set holding tank by fluid-carrying lines, described lime set holding tank is provided with the upper curved fluid-tight bleeder line with certain altitude, and described lime set holding tank and described curved fluid-tight pipeline form a stable-pressure device of cooling unit jointly.
6. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 5, is characterized in that the height liquid seal of described curved fluid-tight bleeder line is 8-10 rice.
7. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 4, it is characterized in that the condensed fluid leakage fluid dram of described vortex cooler unit connects fluid-tight buffer tank by condensate discharge pipeline, the fluid-tight buffer tank run-down pipe with certain altitude is housed in described fluid-tight buffer tank, the liquid discharge pipe of described fluid-tight buffer tank run-down pipe and described fluid-tight buffer tank, near tank bottom below the liquid level that the condensate discharge pipeline of described vortex cooler unit inserts described fluid-tight buffer tank, described fluid-tight buffer tank and described fluid-tight buffer tank run-down pipe form another stable-pressure device of described cooling unit.
8. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 7, is characterized in that the mouth of pipe of described fluid-tight buffer tank run-down pipe is higher than 0.8-1.0 rice at the bottom of the tank of described fluid-tight buffer tank.
9. the PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as described in claim 1,2,3,4,5,6,7 or 8, after it is characterized in that described pre-service, the end of sample letter shoot line is divided into two-way, one tunnel connects in-line analyzer through in-line analyzer flowmeter, and another road is provided with the emptying flow meter for regulating sample gas discharge capacity.
10. PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system as claimed in claim 9, after it is characterized in that described pre-service, sample letter shoot line is also by demarcation T-valve access demarcation gas pipeline, described demarcation gas pipeline connects the outlet of switch three-way valve, two imports of described switch three-way valve connect respectively range source of the gas and zero point source of the gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420585321.8U CN204154563U (en) | 2014-10-11 | 2014-10-11 | PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system |
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| CN201420585321.8U CN204154563U (en) | 2014-10-11 | 2014-10-11 | PTA Equipment oxidation reaction tail gas on-line checkingi sample gas pretreating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
| CN110044676A (en) * | 2019-04-24 | 2019-07-23 | 上海汉克威自动化科技有限公司 | One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method |
| CN112946195A (en) * | 2021-02-03 | 2021-06-11 | 中油锐思技术开发有限责任公司 | Multi-element thermal fluid residual oxygen detection device |
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2014
- 2014-10-11 CN CN201420585321.8U patent/CN204154563U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
| CN110044676A (en) * | 2019-04-24 | 2019-07-23 | 上海汉克威自动化科技有限公司 | One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method |
| CN110044676B (en) * | 2019-04-24 | 2022-01-14 | 上海汉克威自动化科技有限公司 | Sample gas pretreatment system and method for acrylonitrile device oxygen analyzer |
| CN112946195A (en) * | 2021-02-03 | 2021-06-11 | 中油锐思技术开发有限责任公司 | Multi-element thermal fluid residual oxygen detection device |
| CN112946195B (en) * | 2021-02-03 | 2023-10-03 | 中油锐思技术开发有限责任公司 | Multi-element thermal fluid residual oxygen detection device |
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| CP01 | Change in the name or title of a patent holder |
Address after: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee after: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Patentee after: China Textile Industry Design Institute Address before: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee before: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Patentee before: China Textile Industry Design Institute |
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| TR01 | Transfer of patent right |
Effective date of registration: 20170216 Address after: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee after: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Address before: 100037 Beijing city Haidian District Zengguang Road No. 21 Patentee before: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Patentee before: China Textile Industry Design Institute |
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Effective date of registration: 20201218 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. |
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