CN205080080U - Be used for mobile sedimentary temperature monitoring device of pipeline under pressure crystallisate - Google Patents
Be used for mobile sedimentary temperature monitoring device of pipeline under pressure crystallisate Download PDFInfo
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- CN205080080U CN205080080U CN201520833261.1U CN201520833261U CN205080080U CN 205080080 U CN205080080 U CN 205080080U CN 201520833261 U CN201520833261 U CN 201520833261U CN 205080080 U CN205080080 U CN 205080080U
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Abstract
The utility model discloses a be used for mobile sedimentary temperature monitoring device of pipeline under pressure crystallisate. The equipartition has four overlays on following the same circumference of pipeline under pressure outside circumference, and its surface has all welded the thermal resistance, and respective thermocouple is connected respectively to every thermal resistance, frame that four thermocouples passed square link separately respectively is connected with the outer surface vertical of thermal resistance separately, the fastening supporting shoe has all been welded to the side of square link four frames, and the one end of every fastening bracing piece supports in the pipeline under pressure outside after passing fastening supporting shoe centre bore respectively, and the other end fastening of fastening bracing piece is on the fastening supporting shoe. The utility model discloses whether be applied to single or many pipe in parallel's thermocouple temperature monitoring, whether the temperature field of effectively detecting four positions in upper and lower, left and right of pipeline cross section keeps balance, reach pipe in parallel temperature field each other and keep balance, judges the deposit whether appears through the balanced circumstances in temperature field to provide to eliminate the sedimentary prevention and control device of crystallisate.
Description
Technical field
The utility model relates to the on-line monitoring of pipeline or tube bank kind equipment easy crystallographic component flowing deposition, specifically relates to a kind of device for detecting temperature for pressure pipeline crystal flowing deposition.
Background technology
China is crude oil import state maximum in the world, is also the main processing state of crude oil with poor quality processing.In view of high-sulfur, high nitrogen, peracid, the corrosivity crude oil with poor quality difficulty of processing such as chloride is large, purchase cost is low, is that the normality oil that petrochemical enterprise in China pursues profit and refining is planted.Last century the nineties so far, China's Petrochemical is in the evolution of experience home-made equipment, larger-scale unit, crude oil in poor quality, operating mode harshnessization, generally there is the unplanned shutdown accidents such as flowing deposition blocking, the erosion booster of easy crystallographic component in hydrogenation reaction effluent air cooler tube bank and the pipeline that is connected, lead to the security incidents such as a lot of fire, blast, lost very heavy.
Hydrogenation reaction effluent air cooler tube bank and the Problem of Failure of tubes/conduits bundle kind equipment long-standing, the underdeposit corrosion perforation wherein after the easily flowing deposition blocking of crystallographic component, blocking, the thinning booster of erosion after local stoppages cause three kinds of principal modes that pipeline or tube bank kind equipment lost efficacy.Wherein, the reason of standing in the breach is then the flowing deposition problems of easy crystallographic component.For hydrogenation reaction effluent air cooler, because N, S, Cl impurity content in inferior feedstock oil is high, through hydrogenation (H
2) reaction generation NH
3, HCl and H
2s, in cooling procedure, reaction generates NH further
4cl and NH
4hS.Along with the cooling of reaction effluent, the NH in gas phase
4cl and NH
4hS directly can become solid phase from vapor condensation, forms crystallization deposition and blocks tube bank.For preventing the ammonium salt blockage of crystallization from restraining, usually hydrogenation reaction effluent air cooler upstream water filling with dissolve and washing condensation ammonium salt.Although water filling effectively can rinse ammonium salt, ammonium salt moisture absorption is dissolved and is formed the strong aqueous solution of corrosivity.If flow velocity is on the low side in tube bank, causes underdeposit corrosion, otherwise then show as perforation.In order to carry out specific aim prediction and prevention and control, by the component NH of easy crystallization in API932-A/B to the crystallization deposition problem of ammonium salt
3, HCl, H
2s is considered as ideal gas and simplifies, the Tc error obtained with this is very large, have a strong impact on the formulation of the technique prevention policies such as flush position selection, water injection rate setting of the crystallized products such as tube bank kind equipment ammonium salt, so that many petrochemical equipments, although such as high pressure heat exchanger, air cooler and pipeline are provided with continuous injection point or intermittent water flooding point carries out washing away or washing ammonium salt, but still there is the phenomenon of ammonium salt blockage tube bank or pipeline, cause tube bank and bobbin carriage tube sheet junction to ftracture, restrain the Problem of Failure such as flexural deformation, the operation risk of equipment is very big.Repeatedly investigation nearly ten years finds: the ammonium salt crystallization technique water filling rinse-system of many oil refining enterprise varies, both there is the technique of single-point water filling, there is again the situation of multiple spot water filling, water injection rate aspect is meet about the requirement that the liquid phase fraction of water injection rate is greater than 25% in API932-A/B substantially, but ammonium salt crystallization and blocking problem on deformation have still appearred in tube bank/pipeline-like equipment.Its reason is, although the position aqueous water phase fraction of technique injection point is greater than 25%, the flow field of pipe interior can be caused uneven because of density difference, structural mutation again when but oil, gas, water multiphase flow in piping system, particularly a certain position aqueous water quantity not sufficient causes ammonium salt cumulative, until blocking.When the tube bank of parallel connection or the radical of line clogging get more and more, the higher multi-phase flow erosion perforation problem causing sheet-metal duct of unplugged pipe flow speed.
Utility model content
For crystallization and the flowing deposition rule of crystallographic component easy in accurate assurance piping system, the utility model object is to provide a kind of device for detecting temperature for pressure pipeline crystal flowing deposition, meet the function of two aspects, one is judge whether occurred the crystallization deposition of easy crystallographic component in tubes/conduits bundle, carry out risk identification qualitatively by the test in temperature field; Two is the monitoring results in conjunction with electric thermo-couple temperature field, is eliminated the risk of ammonium salt crystallization deposition blocking pipe by the adjustment of injection point, water injection rate.
In order to achieve the above object, the technical solution adopted in the utility model is:
The utility model is circumferentially evenly equipped with four overlay claddings along pressure pipeline external circumferential is same, and the outside surface of each overlay cladding is all welded with thermal resistance, and each thermal resistance is drawn two thermopair wiring respectively and connected respective thermopair; The outside surface of four overlay claddings is parallel with the respective frame of square link respectively, and the frame that four thermopairs are each passed through respective square link is connected with respective thermal resistance outside surface is vertical; The side of square link four frames is all welded with fastening support block, and after one end of every root fastening support bar is each passed through fastening support block center pit, be supported on outside pressure pipeline, the other end of fastening support bar is fastened on fastening support block.
Four thermopairs are each passed through the frame of respective square link, then are connected with respective thermal resistance outside surface is vertical through the heat-insulation layer be coated on outside pressure pipeline; After one end of described every root fastening support bar is each passed through fastening support block center pit, be supported on the heat-insulation layer outer wall of pressure pipeline arranged outside.
All have threaded hole in the another side of square link four frames being welded with fastening support block, compress respective thermopair respectively by housing screw.
The beneficial effect that the utility model has is:
The utility model is applied to electric thermo-couple temperature monitoring device that is single or many parallel pipelines, whether the temperature field, four positions, upper and lower, left and right effectively can detecting single pipe xsect balances, and whether parallel pipeline temperature field each other balances, judge by the temperature fugacity (balance) of analysis temperature field the flowing deposition whether occurring crystal in pipeline, carry out the identification of risk.For the thermo parameters method that thermocouple monitoring obtains, propose a kind of preventing control method of the elimination crystal flowing deposition regulated based on technique water filling, effectively reduce pressure pipeline because of the flowing of crystal and deposit the blocking pipe, local erosion and the underdeposit corrosion risk that cause.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is three-dimensional structure schematic diagram of the present utility model.
Fig. 4 is the partial sectional view of Fig. 1.
Fig. 5 is the side view cutaway drawing of Fig. 4.
Fig. 6 is the scheme of installation of the utility model in parallel pipeline.
Fig. 7 is the partial enlarged drawing in A, B, C, D tetra-regions in Fig. 6.
In figure: 1, pressure pipeline, 2, overlay cladding, 3, thermal resistance, 4, the first support, 5, attachment bolt, 6, thermopair, 7, first thermopair wiring, 8, second thermopair wiring, the 9, second support, 10, heat-insulation layer, 11, fastening support bar, 12, housing screw, 13, the first variable valve, the 14, second variable valve, the 15, the 3rd variable valve, 16, the 4th variable valve, 17, technique waterflood-transmission line, 18, multiphase flow pipeline entrance.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, the utility model comprises pressure pipeline 1, overlay cladding 2, thermal resistance 3, first support 4, second support 9, thermopair 6 and fastening support bar 11; Circumferentially be evenly equipped with four overlay claddings 2 along pressure pipeline 1 external circumferential is same, the outside surface of each overlay cladding is all welded with thermal resistance 3, each thermal resistance 3 is drawn two thermopair wiring 7 respectively and is connected respective thermopair 6 with 8; The outside surface of four overlay claddings 2 is parallel with the respective frame of square link respectively, and the frame that four thermopairs 6 are each passed through respective square link is connected with respective thermal resistance 3 outside surface is vertical.
As shown in Figure 3, the invention structural representation of heat-insulation layer 10 is not set in corresponding diagram 1.Wherein, the side of square link four frames is all welded with fastening support block, and after one end of every root fastening support bar 11 is each passed through fastening support block center pit, be supported on outside pressure pipeline 1, the other end of fastening support bar 11 is fastened on fastening support block.If pressure pipeline arranged outside heat-insulation layer 10, then, after one end of every root fastening support bar 11 is each passed through fastening support block center pit, be supported on outside heat-insulation layer, the other end of fastening support bar 11 is fastened on back-up block.
Composition graphs 1 is known, the situation of heat-insulation layer 10 for pressure pipeline 1 arranged outside.The first support 4, second support 9 be made up of band steel forms described square link by two attachment bolts 5, four thermopairs 6 are each passed through the frame of respective square link, then are connected with respective thermal resistance 3 outside surface is vertical through the heat-insulation layer 10 be coated on outside pressure pipeline 1; After one end of described every root fastening support bar 11 is each passed through fastening support block center pit, be supported on heat-insulation layer 10 outer wall of pressure pipeline 1 arranged outside.
All have threaded hole in the another side of square link four frames being welded with fastening support block, compress respective thermopair 6 respectively by housing screw 12, prevent axial float.
As shown in Figure 4, for having removed the pressure pipeline structure of square support frame, heat-insulation layer 10 and thermopair 6 in Fig. 1, namely 1 overlay cladding 2 is respectively set in orientation, four, the upper and lower, left and right of pressure pipeline 1, then thermal resistance 3 is set at the overlay cladding outside surface that milling is flat.Known shown in composition graphs 1, for the pipeline 1 not needing to be incubated, then can on the basis of Fig. 1, with reference to the mode shown in Fig. 4, one end of fastening support bar 11 is directly supported with pressure pipeline 1 outside surface and fixes.Known shown in composition graphs 4, Fig. 5, overlay cladding 2 has 4, can be 2 in engineering reality
nindividual, such as 2,4,8, set according to actual needs.
As shown in Figure 6, be the scheme of installation of the utility model in parallel pipeline.What parallel pipeline that Fig. 6 provides adopted is is divided into two, two be divided into four, four be divided into eight 2
kasymmetrical arrangement, wherein the value of the utility model embodiment k is k=3, and in engineering reality, k also can get 0,1,2,3 ... Deng, for k=0, namely what in fact test is single pipe.Fluid media (medium) is divided into two through multiphase flow pipeline entrance 18 and is divided into 2 secondary canalization, and 2 secondary canalization are divided into two separately and are divided into 4 triode roads, and 4 triode roads are divided into two separately and are divided into 8 level Four pipelines.Wherein along being divided into two, two be divided into four, four to be divided into the centre position outside wall surface of four horizontal pressure force pipelines (triode road) of the polyphasic flow pressure pipeline structure in parallel of 8 that the identical device for detecting temperature of four structures is set, and the horizontal level installed of each device for detecting temperature and circumferential position angle all identical.Fig. 7 is the enlarged drawing of A, B, C, D tetra-regional temperature monitoring devices in Fig. 6.Similar, the position parallel with multiphase flow pipeline entrance 18 arranges technique waterflood-transmission line 17, technique waterflood-transmission line 17 also adopt be divided into two, two be divided into four 2
msymmetric arrangement, in the present embodiment, m value is 2, usually for 2
kthe pressure pipeline in parallel be arranged symmetrically with, gets m≤k when arranging the injection point of technique waterflood-transmission line 17 end.Be divided into two, two be divided into the end of four parallel connection technology waterflood-transmission lines to meet the first variable valve 13, second variable valve 14, the 3rd variable valve 15, the 4th variable valve 16, four variable valve V respectively
nthe outlet of (n=1,2,3,4) is communicated with four vertical pressure pipelines (triode road) centre position of polyphasic flow pressure pipeline structure in parallel through pipeline respectively.
Specific works process of the present utility model is as follows:
The utility model for embodiment in, pressure pipeline crystal select be NH
4cl and NH
4hS two kinds of ammonium salts, for pressure pipeline be parallel pipeline before hydrogenation reaction effluent air cooler.In other embodiment in engineering reality, crystal can also be that other is soluble in the immobilized particles thing of water, or soluble such as, in the crystal etc. of organic amino, (NH
4)
2s.In reaction effluent after hydrogenation reaction, oil, gas multiphase flow are rich in NH
3, HCl, H
2s, reaction effluent after multiphase flow pipeline entrance 18 enters piping system, along with the reduction of reaction effluent temperature, NH
3, HCl, H
2s can react and generate NH
4cl and NH
4hS two kinds of ammonium salts, these two kinds of ammonium salts directly can become solid crystalline by vapor condensation, once there is the not smooth phenomenon easily occurring flowing deposition blocking pipe of flowing.After there is ammonium salt crystallization deposition in pipeline, the thermo parameters method along pipeline circumference is certainly uneven, can judge whether the flowing deposition problems occurring crystal based on this by temperature field monitoring.Temperature field monitoring and the rate-determining steps of pressure pipeline crystal flowing deposition are as follows:
(1) new equipment goes into operation the initial stage, demarcates, guarantee that error is less than 1% each other, and meet technological requirement the thermopair 6 arranged in pressure pipeline 1.
(2) definition be positioned at the first variable valve 13, second variable valve 14, the 3rd variable valve 15, the 4th variable valve 16 variable valve item be V
n(n=1,2,3,4), and with the item T of its downstream temperature monitoring device
n(n=1,2,3,4) is corresponding, and wherein the upper and lower, left and right of the device for detecting temperature xsect in every variable valve downstream are defined as T respectively
nU, T
nD, T
nL, T
nR, such as T
4Urepresent that item is the temperature value that monitors of device for detecting temperature pipeline outer wall upper surface of 4, other index methods is similar.
(3) thermopair 6 of each item device for detecting temperature has 4, the device for detecting temperature thermopair of 4 items has 16, first thermopair wiring, 7, second thermopair wiring 8 of each thermopair is connected to computer data acquiring card respectively by base band coaxial cable, by testing voltage between first thermopair wiring 7 and second thermopair wiring 8 or electromotive force, in conjunction with the demarcation relation of voltage or electromotive force and temperature, obtain the monitor temperature value T corresponding with voltage or electromotive force.
(4) data acquisition is carried out, for the temperature T of any thermocouple monitoring to the thermopair 6 of each device for detecting temperature
x, x ∈ [1,16], control temperature T
xbe less than the dewpoint temperature of water under corresponding multiphase flow pipeline entrance 18 pressure, i.e. control temperature T
x< T
w.In formula: T
wfor the dewpoint temperature of water.
(5) data acquisition is carried out to the thermopair of arbitrary device for detecting temperature, control the harmonic-mean of four thermocouple monitoring temperature
be less than the dewpoint temperature of water under corresponding multiphase flow pipeline entrance 18 pressure, that is:
In formula
for the temperature harmonic-mean of arbitrary temp monitoring device four thermocouple monitorings.
(6), in pressure pipeline operational process, utilize the voltage of computer data acquiring card to different thermocouple monitoring to gather, obtain the pipe surface temperature that different thermocouple monitoring is corresponding.For the monitored area of arbitrary temp monitoring device, if
then judge that certain region in four monitored areas there occurs the flowing deposition of crystal, wherein temperature fugacity
be defined as:
In formula
for the arithmetic mean of four thermocouple monitoring temperature of the arbitrary device for detecting temperature of correspondence.
(7) according to the temperature fugacity that step (6) calculates
if meet
then strengthen the aperture of upstream regulation valve corresponding with it immediately, reduce the aperture of other three variable valve simultaneously; When technique waterflood-transmission line 17 total flow Q is constant, corresponding temperature fugacity increases more than water injection rate in the pipeline of 8%, carries out water filling flushing or dissolving to crystallization deposition thing, until
and then adjust each variable valve to identical aperture, make the water balance entering into each branch road.Wherein, when each variable valve is adjusted to identical aperture, to surplus be left, avoid all opening to maximum opening and cannot carry out the adjustment of technique water injection rate.
Described
t
xbe less than the dewpoint temperature of water under corresponding multiphase flow pipeline entrance 18 pressure, when
t
xwhen being greater than the dewpoint temperature of water, improving the water filling total amount of technique waterflood-transmission line 17, reduce water filling temperature, until
t
xbe less than the dewpoint temperature of water.
Above-mentioned embodiment is used for explaining and the utility model is described; instead of the utility model is limited; in the protection domain of spirit of the present utility model and claim, any amendment make the utility model and change, all fall into protection domain of the present utility model.
Claims (3)
1. the device for detecting temperature for pressure pipeline crystal flowing deposition, it is characterized in that: be circumferentially evenly equipped with four overlay claddings along pressure pipeline external circumferential is same, the outside surface of each overlay cladding is all welded with thermal resistance, and each thermal resistance is drawn two thermopair wiring respectively and is connected respective thermopair; The outside surface of four overlay claddings is parallel with the respective frame of square link respectively, and the frame that four thermopairs are each passed through respective square link is connected with respective thermal resistance outside surface is vertical; The side of square link four frames is all welded with fastening support block, and after one end of every root fastening support bar is each passed through fastening support block center pit, be supported on outside pressure pipeline, the other end of fastening support bar is fastened on fastening support block.
2. a kind of device for detecting temperature for pressure pipeline crystal flowing deposition according to claim 1, it is characterized in that: four thermopairs are each passed through the frame of respective square link, then be connected with respective thermal resistance outside surface is vertical through the heat-insulation layer be coated on outside pressure pipeline; After one end of described every root fastening support bar is each passed through fastening support block center pit, be supported on the heat-insulation layer outer wall of pressure pipeline arranged outside.
3. a kind of device for detecting temperature for pressure pipeline crystal flowing deposition according to claim 1, it is characterized in that: all have threaded hole in the another side of square link four frames being welded with fastening support block, compress respective thermopair respectively by housing screw.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520833261.1U CN205080080U (en) | 2015-10-26 | 2015-10-26 | Be used for mobile sedimentary temperature monitoring device of pipeline under pressure crystallisate |
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|---|---|---|---|
| CN201520833261.1U CN205080080U (en) | 2015-10-26 | 2015-10-26 | Be used for mobile sedimentary temperature monitoring device of pipeline under pressure crystallisate |
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|---|---|
| CN205080080U true CN205080080U (en) | 2016-03-09 |
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388178A (en) * | 2015-10-26 | 2016-03-09 | 浙江理工大学 | Temperature monitoring device for pressure pipeline crystal substance flowing and deposition and control method |
| CN108225596A (en) * | 2016-12-10 | 2018-06-29 | 沈阳铝镁设计研究院有限公司 | Preheating or heating muff temperature measuring equipment in a kind of alumina producing |
| CN109974872A (en) * | 2019-04-04 | 2019-07-05 | 珠海格力电器股份有限公司 | Improve the detecting tool of temperature detecting precision |
| CN112763399A (en) * | 2020-12-28 | 2021-05-07 | 西安特种设备检验检测院 | Method for detecting flue gas corrosion risk area of low-temperature heating surface of boiler |
| CN114994126A (en) * | 2022-08-03 | 2022-09-02 | 广东天原施莱特新材料有限公司 | Testing device and method applied to high polymer material product |
-
2015
- 2015-10-26 CN CN201520833261.1U patent/CN205080080U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388178A (en) * | 2015-10-26 | 2016-03-09 | 浙江理工大学 | Temperature monitoring device for pressure pipeline crystal substance flowing and deposition and control method |
| CN105388178B (en) * | 2015-10-26 | 2018-08-03 | 浙江理工大学 | Temperature monitoring device and control method for pressure pipeline crystal flowing deposition |
| CN108225596A (en) * | 2016-12-10 | 2018-06-29 | 沈阳铝镁设计研究院有限公司 | Preheating or heating muff temperature measuring equipment in a kind of alumina producing |
| CN109974872A (en) * | 2019-04-04 | 2019-07-05 | 珠海格力电器股份有限公司 | Improve the detecting tool of temperature detecting precision |
| CN112763399A (en) * | 2020-12-28 | 2021-05-07 | 西安特种设备检验检测院 | Method for detecting flue gas corrosion risk area of low-temperature heating surface of boiler |
| CN112763399B (en) * | 2020-12-28 | 2021-09-21 | 西安特种设备检验检测院 | Method for detecting flue gas corrosion risk area of low-temperature heating surface of boiler |
| CN114994126A (en) * | 2022-08-03 | 2022-09-02 | 广东天原施莱特新材料有限公司 | Testing device and method applied to high polymer material product |
| CN114994126B (en) * | 2022-08-03 | 2022-10-21 | 广东天原施莱特新材料有限公司 | Testing device and method applied to high polymer material product |
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Granted publication date: 20160309 Effective date of abandoning: 20180803 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160309 Effective date of abandoning: 20180803 |
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