CN204989079U - It conducts heat and visual test system of scale inhibiting performance to be used for oil refining equipment to seal oily water cooler - Google Patents
It conducts heat and visual test system of scale inhibiting performance to be used for oil refining equipment to seal oily water cooler Download PDFInfo
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- CN204989079U CN204989079U CN201520782954.2U CN201520782954U CN204989079U CN 204989079 U CN204989079 U CN 204989079U CN 201520782954 U CN201520782954 U CN 201520782954U CN 204989079 U CN204989079 U CN 204989079U
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Abstract
The utility model provides an it conducts heat and visual test system of scale inhibiting performance to be used for oil refining equipment to seal oily water cooler, between exporting, the cold side import of sealing oily water cooler is provided with cooling water circulation system with the cold side, be provided with the hot oiling system between hot side -entrance and the export of heat side, set up a differential pressure sensor between the cold side entrance point that seals oily water cooler and cold side exit end, hot side -entrance end and hot side theing seal oily water cooler set up the 2nd differential pressure sensor between the exit end, it sets up a pressure sensor and a temperature sensor on the pipeline of the cold side entrance point of oily water cooler to seal, it sets up the 2nd pressure sensor and the 2nd temperature sensor on the pipeline of the hot side -entrance end of oily water cooler to seal, it sets up the 3rd temperature sensor on the pipeline of the cold side exit end of oily water cooler to seal, it sets up fourth temperature sensor on the pipeline of the heat side exit end of oily water cooler to seal, the heat exchange tube that seals oily water cooler is connected for can dismantle the connection structure of change with the casing of an oily water cooler. The utility model discloses the test data reliability is high, wide applicability.
Description
Technical field
The utility model relates to a kind of Visualizing Test System for oil refining apparatus.Particularly relate to a kind of for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System.
Background technology
In general oil refining apparatus, hot oil pump has oil sealing, and oil sealing is squeezed between seal face pair of friction components, thus reduces end face temperature of mechanical seal.In the pressure ratio pump of oil sealing, pressure medium is slightly high, and oil sealing is generally boosted by special oil sealing pump, is assigned in the annular seal space of every platform pump of pump house by pipeline.
Oil sealing has four effects to be respectively cooling, flushing, lubrication, seal face, and mechanical seal is operated in a good working environment.Coker generally uses wax oil (light wax oil, wax slop is oil sealing for subsequent use) to do oil sealing, and diesel oil is too light, easily a large amount of vaporization, cause pump vapour locking, the initial stage that goes into operation draws oil sealing from device, Deng device become a full member normal after, to be analyzed qualified after, device self wax oil is introduced oil sealing tank and is done oil sealing.In catalytic cracking unit, pump oil sealing is generally diesel oil, the hot oil pump oil sealing used of atmospheric unit is generally atmosphere 3rd side cut (heavy bavin), when going into operation, when atmosphere 3rd side cut discharge deficiency, also can mend oil sealing with vacuum 1st side cut, the normal line oil of atmospheric and vacuum distillation unit also can as oil sealing.So the safe operation of oil sealing to hot oil pump is most important.
Oil sealing is generally that outlet extraction injects mechanical seal after supercooling, needs the temperature of oil sealing to be reduced by water cooler.Temperature due to oil sealing in oil sealing water cooler is higher usually produces crystallisation fouling in water-cooled side, affects heat transfer efficiency.Along with the long-time running of oil sealing water cooler, the heat transfer property gathering meeting severe exacerbation heat transmission equipment of dirt, the dirty layer gathered not only can occupy the circulation area of part, cause the increase of fluid mean flow rate, and make runner become very coarse, cause whole water-cooled effluent dynamic resistance to increase, add the power consumption of pump.In addition, heat exchange surface dirt also may cause local corrosion and even the perforation of heat exchange surface, and the safe operation of oil sealing water cooler in serious threat.Along with the raising of heat transfer enhancement technology, augmentation of heat transfer miscellaneous and mitigation and antiscaling technology are there is, if implement transformation in water cooler, need heat transfer and the scale-inhibiting properties of knowing relevant enhanced heat transfer component, so need a kind of for the heat transfer of heat exchange element in oil sealing water cooler and the test macro of scale-inhibiting properties, thus choose suitable heat transfer enhancement technology.Conventional liquid-liquid water cooler test platform, tests with clean medium, can not the fouling condition of Simulated Water cooler, the heat exchange property obtained and resistance performance parameter and actual conditions difference larger.
Summary of the invention
Technical problem to be solved in the utility model is, there is provided one can simulate chilled water crystallization fouling condition, the augmentation of heat transfer of prediction water cooler test suite and scale-inhibiting properties, for conducting heat and scale-inhibiting properties Visualizing Test System for oil refining apparatus oil sealing water cooler of suitable high efficiency heat transfer element selected by oil sealing water cooler.
The technical scheme that the utility model adopts is: a kind of oil refining apparatus oil sealing water cooler that is used for conducts heat and scale-inhibiting properties Visualizing Test System, include observing and controlling and data acquisition system (DAS) and oil sealing water cooler, between the cold side import of described oil sealing water cooler and cold side outlet port, pipeline is provided with cooling water recirculation system, between the hot side-entrance of described oil sealing water cooler and hot side outlet, pipeline is provided with hot oiling system, and, the first differential pressure pickup be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) is provided with between the cold side entrance point and cold side outlet port end of oil sealing water cooler, the second differential pressure pickup be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) is provided with between the hot side-entrance end and hot side outlet end of oil sealing water cooler, the first pressure transducer and the first temperature sensor that are connected with described observing and controlling and data acquisition system (DAS) is respectively arranged with on the pipeline of the cold side entrance point of oil sealing water cooler, the second pressure transducer and the second temperature sensor that are connected with described observing and controlling and data acquisition system (DAS) is respectively arranged with on the pipeline of the hot side-entrance end of oil sealing water cooler, the three-temperature sensor be connected with described observing and controlling and data acquisition system (DAS) is provided with on the pipeline of the cold side outlet port end of oil sealing water cooler, the 4th temperature sensor be connected with described observing and controlling and data acquisition system (DAS) is provided with on the pipeline of the hot side outlet end of oil sealing water cooler, the heat exchanger tube of described oil sealing water cooler and the connection of the housing of oil sealing water cooler are can according to the syndeton of different test request replacing heat exchanger tube for convenience detach.
The housing of described oil sealing water cooler is the transparent configuration can seeing inner case.
Described cooling water recirculation system, includes: the 3rd retaining valve, cooling tower, water storage device, the first filtrator, cooling water circulating pump, first flow variable valve and the first-class gauge that are set gradually to the cold side import of described oil sealing water cooler by the cold side outlet port of described oil sealing water cooler.
Described water storage device includes the deionized water water storage pipeline and salt solution water storage pipeline that are arranged in parallel, wherein, deionized water water storage pipeline has the 4th retaining valve, deionized water storage tank, primary heater and the first retaining valve that set gradually, described salt solution water storage pipeline has the 5th retaining valve, brine reservoir, secondary heater and the second retaining valve that set gradually, described 4th retaining valve and the inlet end of the 5th retaining valve are all connected the water side of described cooling tower, and described first retaining valve is all connected the water inlet end of described first filtrator with the second retaining valve water outlet end.
Described hot oiling system, include: the 7th retaining valve, oil sealing storage tank, the 3rd well heater, the 6th retaining valve that are set gradually to the hot side-entrance of described oil sealing water cooler by the hot side outlet of described oil sealing water cooler, the second filtrator, oil circulating pump, second adjustable valve and second gauge.
Connection between the housing of described oil sealing water cooler and end socket is flange form syndeton, and be bolted to connection, described housing and end socket are respectively formed with a concave station respectively at joint, concave station on described housing and the concave station on end socket are for being symmetrically formed, and after docking, be jointly configured for the locating slot of stationary tubesheet periphery, the center of described tube sheet has through hole, and the end of described heat exchanger tube is run through through hole and is tightly connected by O type circle and described tube sheet.
The plate face of described tube sheet periphery both sides is tightly connected respectively by gasket seal and described housing and end socket.
Described tube sheet is provided with two panels, and described O type circle is arranged on the joint of two panels tube sheet and the position crossing with described heat exchanger tube.
The groove of more than 1 is had outside the tube wall of described heat exchanger tube, 1 is provided with for measuring the measuring junction of the thermopair of the pipe surface temperature of heat exchanger tube in described every 1 groove, and the measuring junction of described thermopair is fixed by the briquetting be embedded in described groove, the shell wall of described housing has the thermopair outlet for penetration heat galvanic couple signal output part, the endpiece of described thermopair outlet is can the flange arrangement of stationary heat galvanic couple signal output part.
Described pipeline is provided with the heat-insulation layer that can reduce the thermal loss of medium in course of conveying.
Of the present utility model for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, there is following good effect:
1, test macro of the present utility model, what first solve is to provide one for testing the ideally clean unstained test macro of oil sealing water cooler, and secondly the utility model can also realize the heating power of test suite under fouled condition and the test function of hydraulic performance.
2, test macro of the present utility model and oil sealing refrigeratory actual condition can be good at coincideing, and operating condition of test is stablized, and test data reliability is high.
3, test macro of the present utility model uses two kinds to measure heat transfer coefficient in tubes method, also extends to heat transfer and scale-inhibiting properties test that all kinds of intensify heat transfer pipe comprises light pipe and shape tube enhanced heat transfer component, widely applicable.
4, the utility model test system and test outer cover of heat exchanger is that light-permeable pressure-bearing material is made, and is convenient to observe fouling behavior and study.
Accompanying drawing explanation
Fig. 1 is the utility model test macro one-piece construction schematic diagram;
Fig. 2 is heat exchanger tube and the installation of TC schematic diagram in oil sealing water cooler;
Fig. 3 is the dirt curve of three kinds of different materials heat exchanger tubes within induction period using the direct method of measurement to record;
Fig. 4 is that heat exchanger tube adopts light pipe and spiral flat tube to run the overall heat transfer coefficient after 360 minutes and Reynolds number comparison diagram under clean state with under fouled condition.
In figure
1: deionized water storage tank 2: brine reservoir
3: oil sealing storage tank 4: oil sealing water cooler test suite
5: primary heater 6: secondary heater
7: the three well heater 8: the first retaining valves
9: the second retaining valves 10: first flow variable valve
11: the three retaining valve 12: the four retaining valves
13: the five retaining valve 14: the six retaining valves
15: second adjustable valve 16: the seven retaining valve
17: the first filtrator 18: the second filtrators
19: cooling water circulating pump 20: oil circulating pump
21: first-class gauge 22: second gauge
23: the first pressure transducer 24: the second pressure transducers
25: the first temperature sensor 26: the second temperature sensors
27: the three-temperature sensor 28: the four temperature sensors
29: the first differential pressure pickup 30: the second differential pressure pickups
31: cooling tower 32: water storage device
33: observing and controlling and data acquisition system (DAS) 401: heat exchanger tube
402: tube sheet 403: end socket
404:O type circle 405: gasket seal
406: thermopair 407: briquetting
408: thermopair outlet 409: housing
4010: bolt 4011: concave station
4012: concave station 4013: groove
Embodiment
Be described in detail for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System of the present utility model below in conjunction with embodiment and accompanying drawing.
Of the present utility model for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, coordinated signals switch is carried out by valve, complete the switching of stream, one can being provided for testing the ideally clean unstained test macro of oil sealing water cooler, the heating power of heat exchanger tube under fouled condition and the test function of hydraulic performance of oil sealing water cooler can also be realized.Test macro uses two kinds to measure heat transfer coefficient in tubes method, also extends to the performance test that all kinds of intensify heat transfer pipe comprises light pipe and shape tube enhanced heat transfer component.
As shown in Figure 1, of the present utility model for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, include observing and controlling and data acquisition system (DAS) 33 and oil sealing water cooler 4, the housing 409 of described envelope oil sealing water cooler 4 is the transparent configuration can seeing inner case.Be provided with deionized water by pipeline between the cold side import of described oil sealing water cooler 4 and cold side outlet port and be cleaning medium and be can the cooling water recirculation system of fouling medium with brackish water, being provided with by pipeline with oil sealing between the hot side-entrance of described oil sealing water cooler 4 and hot side outlet is the hot oiling system of medium, and, the first differential pressure pickup 29 be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) 33 is provided with between the cold side entrance point and cold side outlet port end of oil sealing water cooler 4, the second differential pressure pickup 30 be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) 33 is provided with between the hot side-entrance end and hot side outlet end of oil sealing water cooler 4, the first pressure transducer 23 and the first temperature sensor 25 be connected with described observing and controlling and data acquisition system (DAS) 33 is respectively arranged with on the pipeline of the cold side entrance point of oil sealing water cooler 4, the second pressure transducer 24 and the second temperature sensor 26 be connected with described observing and controlling and data acquisition system (DAS) 33 is respectively arranged with on the pipeline of the hot side-entrance end of oil sealing water cooler 4, the three-temperature sensor 27 be connected with described observing and controlling and data acquisition system (DAS) 33 is provided with on the pipeline of the cold side outlet port end of oil sealing water cooler 4, the 4th temperature sensor 28 be connected with described observing and controlling and data acquisition system (DAS) 33 is provided with on the pipeline of the hot side outlet end of oil sealing water cooler 4, the heat exchanger tube 401 of described oil sealing water cooler 4 and the connection of the housing 409 of oil sealing water cooler 4 are can according to the syndeton of different test request replacing heat exchanger tube for convenience detach.
Described cooling water recirculation system, includes: the 3rd retaining valve 11, cooling tower 31, water storage device 32, first filtrator 17, cooling water circulating pump 19, first flow variable valve 10 and the first-class gauge 21 that are set gradually to the cold side import of described oil sealing water cooler 4 by the cold side outlet port of described oil sealing water cooler 4.Before described cooling water circulating pump 19 entrance, pipeline arranges the first filtrator 17, be used for filtering system run in the dirty layer that peels off, cooling water circulating pump is played a protective role.
Wherein, described water storage device 32 includes the deionized water water storage pipeline and salt solution water storage pipeline that are arranged in parallel, wherein, deionized water water storage pipeline has the 4th retaining valve 12 set gradually, deionized water storage tank 1, primary heater 5 and the first retaining valve 8, described salt solution water storage pipeline has the 5th retaining valve 13 set gradually, brine reservoir 2, secondary heater 6 and the second retaining valve 9, described 4th retaining valve 12 and the inlet end of the 5th retaining valve 13 are all connected the water side of described cooling tower 31, described first retaining valve 8 is all connected the water inlet end of described first filtrator 17 with the second retaining valve 9 water outlet end, thus realize deionized water medium and brackish water medium autonomous closure closed circuit function.
Two pipelines that primary heater 5 and secondary heater 6 export install the first retaining valve 8 and the second retaining valve 9 respectively, two articles of pipelines that cooling tower 31 is exported to deionized water storage tank 1 and brine reservoir 2 install the 4th retaining valve 12 and the 5th retaining valve 13 respectively, carry out coordinated signals switch by described 4 valves, realize deionized water medium and brackish water medium autonomous closure closed circuit function separately.
Specific works process is: close the second retaining valve 9 and the 5th retaining valve 13 while opening the first retaining valve 8 and the 4th retaining valve 12, the cold junction medium of oil sealing water cooler 4 is deionized water, i.e. brackish water conductively-closed, hot junction is oil sealing, realizes the function of test oil sealing water cooler clean state; Open the second retaining valve 9 and the 5th retaining valve 13 while closing the first retaining valve 8 and the 4th retaining valve 12, the cold junction medium of oil sealing water cooler 4 is brackish water, i.e. deionized water conductively-closed, and hot junction is oil sealing, realizes the function of test oil sealing water cooler fouled condition.
Described hot oiling system, include: the 7th retaining valve 16, oil sealing storage tank 3, the 3rd well heater 7, the 6th retaining valve 14, second filtrator 18, oil circulating pump 20, second adjustable valve 15 and the second gauge 22 that are set gradually to the hot side-entrance of described oil sealing water cooler 4 by the hot side outlet of described oil sealing water cooler 4.The outlet of described oil circulating pump 20 arranges second adjustable valve 15 with second gauge 22 and Access Control and data acquisition system (DAS), be used for regulating and record oil sealing flow.
Of the present utility modelly adopt the heat-insulation layer be made up of insulation material to be incubated for the heat transfer of oil refining apparatus oil sealing water cooler with all pipelines in scale-inhibiting properties Visualizing Test System, the minimizing thermal loss of medium in course of conveying.
As shown in Figure 2, connection between the housing 409 of described oil sealing water cooler 4 and end socket 403 is flange form syndeton, and be fixedly connected with by bolt 4010, described housing 409 and end socket 403 are respectively formed with a concave station 4011 respectively at joint, 4012, concave station 4011 on described housing 409 and the concave station 4012 on end socket 403 are for being symmetrically formed, and after docking, be jointly configured for the locating slot of stationary tubesheet 402 periphery, the center of described tube sheet 402 has through hole 4013, the end of described heat exchanger tube 401 is run through through hole 4013 and is tightly connected by O type circle 404 and described tube sheet 402, the plate face of described tube sheet 402 periphery both sides is tightly connected respectively by gasket seal 405 and described housing 409 and end socket 403.Described tube sheet 402 is provided with two panels, and described O type circle 404 is arranged on the joint of two panels tube sheet 402 and the position crossing with described heat exchanger tube 401.
The groove 4013 of more than 1 is had outside the tube wall of described heat exchanger tube 401,1 is provided with for measuring the measuring junction of the thermopair 406 of the pipe surface temperature of heat exchanger tube 401 in described every 1 groove 4013, and the measuring junction of described thermopair 406 is fixed by the briquetting 407 be embedded in described groove 4013, the shell wall of described housing 409 has the thermopair outlet 408 for penetration heat galvanic couple signal output part, the endpiece of described thermopair outlet 408 is can the flange arrangement of stationary heat galvanic couple signal output part.
Of the present utility model as follows with the operation key step of scale-inhibiting properties Visualizing Test System for the heat transfer of oil refining apparatus oil sealing water cooler:
(1) deionized water storage tank, brine reservoir and oil sealing storage tank and pipe system is cleaned;
(2) assemble heat exchanger tube, often before group test, the heat exchanger tube of test cleaned and dried, thermopair measuring point be installed and make it fastening firm;
(3) cooling water circulating pump 19 and primary heater 5, secondary heater 6 and the 3rd well heater 7 is started, after oil sealing reaches uniform temperature and cold junction temperature reaches the temperature needed for test, rear unlatching cooling water circulating pump 19 opens the first retaining valve 8, the 4th retaining valve 12, close the second retaining valve 9, the 5th retaining valve 13, deionized water cooling recirculation system starts circulation, open oil circulating pump 20, hot side medium cold junction medium carries out convection heat transfer' heat-transfer by convection in heat exchanger tube, controls inlet flow rate and the temperature of cool and heat ends;
(4) start cooling tower 31, regulate air quantity, maintain cold junction temperature constant;
(5) reach after thermal equilibrium until whole system, carry out the heat transfer characteristic test under clean conditions;
(6) and then toward brine reservoir 2 add required chemical agent respectively, start the heat transfer characteristic test under fouled state;
First the CaCl diluted is added
2solution, circulates after 20 minutes, then adds the NaHCO diluted
3solution, starts test.In process of the test, every three hours, sampling analysis is carried out to solution, measure the Ca in solution
2+concentration, and by adding CaCl
2and NaHCO
3regulate, make Ca in process of the test
2+concentration and initial concentration are close to consistent.
(7) observe heat exchanger tube surface scale situation, each Parameters variation of time recording, until test process terminates, preserve the test data gathered;
(8) test terminates the heating of rear halt system, when hot-side inlet temperature drops to below 50 DEG C, and shutdown system cooling water circulating pump 19 and oil circulating pump 20.
(9) dismantle experimental test section and take out the heat exchanger tube tested, with to be observed;
(10) washing test system, first cleans with the dilute hydrochloric acid solution of 0.1%, then passes into tap water and clean.
Of the present utility model in the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, the heat exchange heat transfer coefficient in tubes of oil sealing water cooler has two kinds of metering systems: a kind of is structure according to Fig. 2, direct measurement heat exchanger tube outside wall temperature, heat exchange testing tube wall arranges some thermopairs; Another kind is indirect matching, first in pipe, changes pipe external flux under Peak Flow Rate condition, simulates the outer heat transfer correlations of pipe by power function form.Then under the outer flow conditions of largest tube, change flow in pipe, calculate entire thermal resistance by the inside and outside out temperature of pipe and heat exchange gauge.From entire thermal resistance, deduct heat transfer outside a tube thermal resistance and tube wall heat conduction thermal resistance, intraductal heat exchange thermal resistance can be drawn, and obtain heat transfer coefficient in tubes.
Provide instantiation below:
Example 1:
In this routine implementation process, it is the Ni-P electroless plating pipe that electroless plating is carried out on matrix heat exchanger tube surface that the test heat exchanger tube kind of oil sealing refrigeratory test suite 4 is respectively red copper light pipe, stainless steel bare tube and red copper light pipe.As shown in Figure 3, the dirt curve of three kinds of heat exchanger tubes within induction period, according to the order of copper tube, stainless-steel tube and Ni-P electroless plating pipe, dirt obviously extends induction period, be respectively 65 minutes, 110 minutes and 180 minutes, the dirt of stainless-steel tube and Ni-P electroless plating pipe was 1.7 times and 2.8 times of copper tube induction period respectively.In the fouling growth stage, the dirty speed of life of copper tube is maximum, and stainless-steel tube takes second place, the dirty speed of life of Ni-P electroless plating pipe is minimum, respectively at 400 minutes, 550 minutes and about 360 minutes dirtiness resistances demonstrate asymptotic tendency, illustrate that the rate of sedimentation of now dirt is close to dirt detachment rate.Within the asymptotic thermal resistance phase, dirtiness resistance still continues to increase, and rate of rise but constantly slows down.At the trial in length, the dirtiness resistance value of three kinds of heat exchanger tubes not yet reaches asymptotic thermal resistance, and 900 minutes time, dirtiness resistance is respectively 1.22 × 10
-4m
2k/W, 7.37 × 10
-5m
2k/W, 3.43 × 10
-5m
2k/W, the dirtiness resistance of stainless-steel tube and Ni-P electroless plating pipe is respectively 60.4% and 28.1% of copper tube.
Example 2:
The test macro that case study on implementation 2 uses is consistent with example 1, with example 1 difference be: the test heat exchanger tube kind of oil sealing refrigeratory test suite 4 is respectively stainless steel bare tube and the special-shaped twisted oval tube formed by machine work taking stainless steel bare tube as base tube, measure heat transfer coefficient in tubes in oil sealing water cooler test simulation assembly pipe, this example adopts indirect matching, first in pipe, change pipe external flux under Peak Flow Rate condition, simulate the outer heat transfer correlations of pipe by power function form.Then under the outer flow conditions of largest tube, change flow in pipe, calculate entire thermal resistance by the inside and outside out temperature of pipe and heat exchange gauge.From entire thermal resistance, deduct heat transfer outside a tube thermal resistance and tube wall heat conduction thermal resistance, can draw intraductal heat exchange thermal resistance, and obtain heat transfer coefficient in tubes, indirect approximating method does not need thermocouple measurement heat exchange tube wall temperature.It is as follows that indirect method measures specific implementation process.
(1) flow in stationary pipes, change pipe external flux, by Nu
o=c
ore
0.8pr
0.4simulate the outer heat transfer correlations of pipe.
Assuming that heat transfer outside a tube Nu and Re
0 . 8pr
0 . 4there is linear relationship, then overall heat transfer coefficient k can be expressed as formula 1
Formula 1:
In formula, h
ifor intraductal heat exchange coefficient, h
ofor heat transfer outside a tube coefficient, d
ifor bore, d
ofor pipe external diameter, Re is Reynolds number, and Pr is Prandtl number, and λ c is medium heat conduction coefficient in pipe, and λ w is heat exchanger tube coefficient of heat conductivity.Keep certain owing to managing interior flow, then now intraductal heat exchange coefficient is constant.With
for horizontal ordinate, take y=1/k as ordinate, employing linear fit can in the hope of constant c
o.C
oafter known, the outer coefficient h of conducting heat of pipe can be tried to achieve by formula 2
o
Formula 2:
(2) stationary pipes external flux, flow in change pipe.Pipe external flux keeps constant flow and is maximal value as far as possible, changes flow in pipe and, by formula 3, tries to achieve heat transfer coefficient in tubes.Wherein, heat transfer outside a tube coefficient h
otry to achieve by formula 2.In formula 3
For pipe
Wall thermal conduction resistance.
Formula 3:
As shown in Figure 4, two kinds of heat exchanger tubes run the heat transfer coefficient after 360 minutes and Reynolds number comparison diagram under clean state with under fouled condition.Under fouled condition, the 78%-88% when overall heat transfer coefficient of spiral torsional curved tube is clean state, and 58%-67% when overall heat transfer coefficient is clean state under light pipe fouled condition.
Claims (10)
1. one kind conducts heat and scale-inhibiting properties Visualizing Test System for oil refining apparatus oil sealing water cooler, include observing and controlling and data acquisition system (DAS) (33) and oil sealing water cooler (4), it is characterized in that, between the cold side import of described oil sealing water cooler (4) and cold side outlet port, pipeline is provided with cooling water recirculation system, between the hot side-entrance of described oil sealing water cooler (4) and hot side outlet, pipeline is provided with hot oiling system, and, the first differential pressure pickup (29) be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) (33) is provided with between the cold side entrance point and cold side outlet port end of oil sealing water cooler (4), the second differential pressure pickup (30) be connected for measuring two ends pressure reduction with described observing and controlling and data acquisition system (DAS) (33) is provided with between the hot side-entrance end and hot side outlet end of oil sealing water cooler (4), the first pressure transducer (23) and the first temperature sensor (25) that are connected with described observing and controlling and data acquisition system (DAS) (33) is respectively arranged with on the pipeline of the cold side entrance point of oil sealing water cooler (4), the second pressure transducer (24) and the second temperature sensor (26) that are connected with described observing and controlling and data acquisition system (DAS) (33) is respectively arranged with on the pipeline of the hot side-entrance end of oil sealing water cooler (4), the three-temperature sensor (27) be connected with described observing and controlling and data acquisition system (DAS) (33) is provided with on the pipeline of the cold side outlet port end of oil sealing water cooler (4), the 4th temperature sensor (28) be connected with described observing and controlling and data acquisition system (DAS) (33) is provided with on the pipeline of the hot side outlet end of oil sealing water cooler (4), the heat exchanger tube (401) of described oil sealing water cooler (4) and the connection of the housing (409) of oil sealing water cooler (4) are can according to the syndeton of different test request replacing heat exchanger tube for convenience detach.
2. according to claim 1 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, the housing (409) of described oil sealing water cooler (4) is the transparent configuration can seeing inner case.
3. according to claim 1 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, described cooling water recirculation system, includes: the 3rd retaining valve (11), cooling tower (31), water storage device (32), the first filtrator (17), cooling water circulating pump (19), first flow variable valve (10) and the first-class gauge (21) that are set gradually to the cold side import of described oil sealing water cooler (4) by the cold side outlet port of described oil sealing water cooler (4).
4. according to claim 3 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, described water storage device (32) includes the deionized water water storage pipeline and salt solution water storage pipeline that are arranged in parallel, wherein, deionized water water storage pipeline has the 4th retaining valve (12) set gradually, deionized water storage tank (1), primary heater (5) and the first retaining valve (8), described salt solution water storage pipeline has the 5th retaining valve (13) set gradually, brine reservoir (2), secondary heater (6) and the second retaining valve (9), described 4th retaining valve (12) and the inlet end of the 5th retaining valve (13) are all connected the water side of described cooling tower (31), described first retaining valve (8) and the second retaining valve (9) water outlet end are all connected the water inlet end of described first filtrator (17).
5. according to claim 1 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, described hot oiling system, include: the 7th retaining valve (16), oil sealing storage tank (3), the 3rd well heater (7), the 6th retaining valve (14) that are set gradually to the hot side-entrance of described oil sealing water cooler (4) by the hot side outlet of described oil sealing water cooler (4), the second filtrator (18), oil circulating pump (20), second adjustable valve (15) and second gauge (22).
6. according to claim 1 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, connection between the housing (409) of described oil sealing water cooler (4) and end socket (403) is flange form syndeton, and be fixedly connected with by bolt (4010), described housing (409) and end socket (403) are respectively formed with a concave station (4011 respectively at joint, 4012), concave station (4011) on described housing (409) and the concave station (4012) on end socket (403) are for being symmetrically formed, and after docking, be jointly configured for the locating slot of stationary tubesheet (402) periphery, the center of described tube sheet (402) has through hole (4013), the end of described heat exchanger tube (401) is run through through hole (4013) and is tightly connected by O type circle (404) and described tube sheet (402).
7. according to claim 6 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, the plate face of described tube sheet (402) periphery both sides is tightly connected respectively by gasket seal (405) and described housing (409) and end socket (403).
8. according to claim 6 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, described tube sheet (402) is provided with two panels, and described O type circle (404) is arranged on the joint of two panels tube sheet (402) and the position crossing with described heat exchanger tube (401).
9. according to claim 6 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, the groove (4013) of more than 1 is had outside the tube wall of described heat exchanger tube (401), 1 is provided with for measuring the measuring junction of the thermopair (406) of the pipe surface temperature of heat exchanger tube (401) in described every 1 groove (4013), and the measuring junction of described thermopair (406) is fixed by the briquetting (407) be embedded in described groove (4013), the shell wall of described housing (409) has the thermopair outlet (408) for penetration heat galvanic couple signal output part, the endpiece of described thermopair outlet (408) is can the flange arrangement of stationary heat galvanic couple signal output part.
10. according to claim 1 for the heat transfer of oil refining apparatus oil sealing water cooler and scale-inhibiting properties Visualizing Test System, it is characterized in that, described pipeline is provided with the heat-insulation layer that can reduce the thermal loss of medium in course of conveying.
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| CN201520782954.2U CN204989079U (en) | 2015-10-10 | 2015-10-10 | It conducts heat and visual test system of scale inhibiting performance to be used for oil refining equipment to seal oily water cooler |
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| CN201520782954.2U CN204989079U (en) | 2015-10-10 | 2015-10-10 | It conducts heat and visual test system of scale inhibiting performance to be used for oil refining equipment to seal oily water cooler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158293A (en) * | 2015-10-10 | 2015-12-16 | 中国石油化工股份有限公司 | Visual testing system for heat transfer and scale inhibition property of oil sealing water cooler of oil refining device |
| CN112284449A (en) * | 2020-10-19 | 2021-01-29 | 东北电力大学 | Experimental device for be used for testing electromagnetism and press down dirt equipment performance |
-
2015
- 2015-10-10 CN CN201520782954.2U patent/CN204989079U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158293A (en) * | 2015-10-10 | 2015-12-16 | 中国石油化工股份有限公司 | Visual testing system for heat transfer and scale inhibition property of oil sealing water cooler of oil refining device |
| CN112284449A (en) * | 2020-10-19 | 2021-01-29 | 东北电力大学 | Experimental device for be used for testing electromagnetism and press down dirt equipment performance |
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