CN203455083U - Acid dew point temperature tester - Google Patents
Acid dew point temperature tester Download PDFInfo
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- CN203455083U CN203455083U CN201320463945.8U CN201320463945U CN203455083U CN 203455083 U CN203455083 U CN 203455083U CN 201320463945 U CN201320463945 U CN 201320463945U CN 203455083 U CN203455083 U CN 203455083U
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Abstract
The utility model discloses an acid dew point temperature tester of flue gas medium in the petroleum chemical field; the acid dew point temperature tester comprises a detector, a water cooling unit, and a host machine; the detector comprises an inner pipe, an outer pipe, a heatproof glass, a front sealing panel, a back sealing panel, an inner electrode and an outer electrode; end portions of the inner pipe and the outer pipe are coaxially welded on the back sealing panel; front ends of the inner and outer pipes are respectively sealed by the front sealing panel and the heatproof glass; an interlayer between the inner pipe and the outer pipe forms a water cooling path; mutually parallel front ends of the inner and outer electrodes penetrate the back sealing panel and the front sealing panel, and are embedded on the surface of the heatproof glass; the water cooling unit comprises a water groove, cooling water, a water pipeline and a control valve; the host machine realizes control and detection functions. The acid dew point temperature tester can fast and conveniently test the acid dew point temperature of the flue gas of a heating furnace and a catalysis device, thereby making an evaluation for flue gas low temperature dew point corrosion status.
Description
Technical field
The utility model belongs to petrochemical industry, relates in particular to a kind of acid dew-point temperature analyzer of flue gas medium.
Background technology
2012, crude oil in China net importation amount reached 2.69 hundred million tons, and externally interdependency reaches 56.6%.In imported crude oil, sulfur content is generally higher, causes SOx in flue gas to increase, and when flue-gas temperature drops to below 400 ℃, will, at equipment surface generation sulfuric acid corrosion, cause device damage, cisco unity malfunction.In tubular heater residual neat recovering system, flue gas often produces strong low-temperature dew point corrosion on the heat-transfer surface of the equipment such as air preheater, waste heat boiler, and even, within the duration of runs less than 1 year, heat-transfer surface is bored a hole with regard to heavy corrosion; In the heat-insulation system of furnace wall, flue gas corrosion causes anchor nails to come off, and furnace insulation caves in, and tubular furnace can not normally be moved.In catalytic cracking reaction-regenerative system, sulphur in raw material approximately has 5%～10% with coke, to bring regenerator into, when burning, generate SOx, regenerator, the three-stage cyclone separator housing generation micro-crack of catalytic cracking units overlapped in the whole nation existing tens in recent years, threatens the safety and stability of device.Therefore, thus measure exactly flue gas acid dew point temperature effectively to carry out corrosion protection be very necessary work.
Chinese patent CN102175340A discloses a kind of " dew-point temperature measuring device for solid waste incinerator flue gas acid medium ", comprises and measures sensing mechanism, control module, apparatus main body and air cooling unit.Described measurement sensing mechanism comprises temperature-sensitive, wet sensitive integrated sensing mechanism, for responding to the sorrel forming when the sour smoke condensation, and realizes the measurement of acid dew-point temperature; Air cooling unit utilizes 2～3kgf/cm
2the pressurized air of pressure, impels the formation of stablizing sorrel.Existing published acid medium dewpoint temperature analyzer patent is also that similar above-mentioned structure forms and the course of work.This class acid medium dewpoint temperature analyzer all needs to make heat eliminating medium with pressurized air when work, very inconvenient in actual applications, especially for devices such as tubular heater, regenerators, instrument connection position is overhead very high, the restriction of air-source and point of interface by compression, be not easy the compressed-air line of plugging into, and as heat eliminating medium, the specific heat capacity of air is less, containing sour smoke condensation, form the time that sorrel need to be longer, the corresponding time of measuring acid dew-point temperature just need to be longer, these problems have limited the use of acid dew-point temperature analyzer.
Along with going deep into of enterprise's " energy-saving and emission-reduction " work, flue gas acid dew point temperature value has become to install important normalization management parameters, and acid dew-point temperature is measured more and more frequent, in the urgent need to a kind of more convenient analyzer of acid dew-point temperature faster.
Utility model content
The purpose of this utility model is to provide a kind of acid dew-point temperature analyzer for petrochemical industry flue gas medium, to solve acid medium dewpoint temperature analyzer inconvenient problem with use in prior art, quickly and easily the acid dew-point temperature of the device flue gases such as heating furnace, catalysis is carried out to Measurement accuracy, thereby flue gas low-temperature dew point corrosion situation is made an appraisal, for effectively carrying out equipment corrosion protected working, provide reliable foundation.
For addressing the above problem, the technical solution adopted in the utility model is:
A kind of acid dew-point temperature analyzer of flue gas medium, comprise probe unit, water cooling unit and main computer unit, it is characterized in that: described probe unit stretches into flue work, be provided with inner tube, outer tube, pyroceram, front shrouding, rear shrouding, interior electrode, external electrode, wherein both end coaxial welding of inner and outer tubes are on rear shrouding, inner tube front end is sealed by front shrouding, outer tube front end is sealed by pyroceram, between the interlayer of inner and outer tubes and front shrouding and pyroceram, form cooling-water duct, on outer tube, be provided with water inlet pipe and the rising pipe of chilled water; Interior electrode parallel to each other and external electrode one end are embedded on the surface of pyroceram through rear shrouding, front shrouding, and the other end is connected with main computer unit; The formation situation of sorrel can be responded in the surface of pyroceram in flue gas; Water cooling unit, in flue operate outside, is connected with outer tube, and when chilled water flows through in cooling-water duct, pyroceram surface temperature reduces, and contains H
2sO
4the flue gas of steam forms sorrel at pyroceram surface sweating; Main computer unit is realized and being controlled and measuring ability.
Described water cooling unit is provided with tank, cooling water pipeline, by-pass valve control, cooling water pipeline one end connection water channel, and the other end is connected with the water inlet pipe on outer tube by by-pass valve control.
Described main computer unit is provided with reometer, thermo detector, controller, wherein reometer and thermo detector are realized the measurement function of main computer unit, controller is realized the control function of main computer unit, reometer is connected by control circuit with thermo detector, and reometer is connected with controller by control circuit separately with thermo detector.When stable sorrel forms, it is the acid dew-point temperature of flue gas that thermo detector is measured the now surface temperature of pyroceram.
The acid dew-point temperature analyzer of a kind of flue gas medium of the utility model, it is further characterized in that: described tank is positioned at the top position of rising pipe.
The acid dew-point temperature analyzer of a kind of flue gas medium of the utility model, it is further characterized in that: between described inside and outside electrode and rear shrouding, be provided with insulator; Between inside and outside electrode and front shrouding, cooling-water duct, be also provided with insulator.
The acid dew-point temperature analyzer of a kind of flue gas medium of the utility model, it is further characterized in that: the width of described cooling-water duct is 2～3mm.
The acid dew-point temperature analyzer of a kind of flue gas medium of the utility model, it is further characterized in that: described water cooling unit chilled water used is 0 ℃ of frozen water.
Adopt the utility model, there is following beneficial effect: a kind of acid dew-point temperature analyzer of (1) the utility model, provide bosh for oneself, water is as heat eliminating medium, during work without the pressurized air of plugging into, the not restriction of air-source and point of interface by compression, water relies on gravity to realize unpowered the flowing in cooling-water duct, complete the cooling dewfall containing acid fume gas, operation is used convenient.(2) a kind of acid dew-point temperature analyzer of the utility model, due to heat eliminating medium frozen water used, temperature is lower than pressurized air, can be faster to the cooling velocity containing acid fume gas, the Measuring Time of flue gas acid dew point temperature is also just shorter; And the density ratio 2～3kgf/cm of water under mark state
2the pressurized air density of pressure is large, and glassware for drinking water has specific heat capacity maximum in common gas-liquid material, and unit volume can absorb more heat, and it is less that the volume of acid dew-point temperature analyzer also can be done.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of acid dew-point temperature analyzer of the utility model;
Fig. 2 is pyroceram front elevation.
Reference numeral shown in figure is: 1-tank, 2-chilled water, 3-water pipeline, 4-by-pass valve control, 5-water inlet pipe, shrouding after 6-, 7-external electrode, 8-reometer, 9-main frame, 10-thermo detector, 11-control circuit, 12-controller, electrode in 13-, 14-insulator, 15-rising pipe, 16-inner tube, 17-outer tube, shrouding before 18-, 19-sorrel, 20-flue gas, 21-pyroceram, 22-flue, 23-walling of flue, 24-cooling-water duct.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.The drawings and specific embodiments do not limit the claimed scope of the utility model.
As shown in Figure 1, a kind of acid dew-point temperature analyzer of the utility model, for a kind of embodiment of tubular heater or For Fcc Regenerator flue, comprises probe unit, water cooling unit and main frame three parts.
The probe unit of described acid dew-point temperature analyzer stretches into flue 22 work, be provided with inner tube 16, outer tube 17, pyroceram 21, front shrouding 18, rear shrouding 6, interior electrode 13, external electrode 7, water inlet pipe 5 and rising pipe 15, wherein both end coaxial welding of inner tube 16 and outer tube 17 are on rear shrouding 6, front end by front shrouding 18 and pyroceram 21 sealings, forms cooling-water duct 24 between the interlayer of inner tube 16 and outer tube 17 and front shrouding and pyroceram respectively.
The implication of flue gas acid dew point temperature value in analyzer is exactly to contain acid fume gas on a surface, the temperature on surface when the condensing rate of acid equals evaporation rate, the synthesis rate of surface acid when dewpoint temperature is zero, forms the surface temperature value of pyroceram 21 while stablizing sorrel 19.That prior art heat eliminating medium adopts is 2～3kgf/cm
2the pressurized air of pressure, in reality detects, compressed air gas source and point of interface are far from instrument connection sometimes, need to connect very long air line, to testing, put to no little inconvenience.The utility model acid dew-point temperature analyzer replaces air cooling by water-cooled, provides tank 1 for oneself, during work without the pressurized air of plugging into.Water inlet pipe 5 and rising pipe 15 are symmetrically welded in the end of outer tube 17, the frozen water of 0 ℃ enters cooling-water duct 24 from water inlet pipe 5, the interlayer of shrouding 18 and pyroceram 21 before flowing through, cooling pyroceram 21, make in flue 22 containing acid fume gas 20 at pyroceram 21 surface sweatings, form sorrel 19, sorrel 19 is also in constantly evaporation simultaneously, when the synthesis rate of sorrel 19 is zero, pyroceram 21 surface temperature values are exactly the acid dew-point temperature value of flue gas 20.
Described acid dew-point temperature analyzer heat eliminating medium adopts the frozen water of 0 ℃, generally in device, compressed-air actuated temperature after compressor mostly higher than 20 ℃, can be higher than 40 ℃ in summer, therefore frozen water and the Temperature Difference Ratio pressurized air of flue gas and the temperature difference of flue gas at most can be high 40～50 ℃, can when shorter, chien shih flue gas 20 to be at pyroceram 21 surface sweatings, the Measuring Time of flue gas acid dew point temperature is also just shorter.On the other hand, under mark state, the density of water is 1g/cm
3, pressurized air (25 ℃, 2～3kgf/cm
2) density is 3.87 * 10
-3g/cm
3, under mark state, specific heat of water holds for 4.186kJ/ (kg.k), and pressurized air (25 ℃, 2～3kgf/cm
2) specific heat capacity is 1.012kJ/ (kg.k), therefore the water of unit volume can absorb more heat, heat eliminating medium consumption just can reduce, the width a of acid dew-point temperature analyzer cooling-water duct 24 just can correspondingly reduce, the width of existing acid dew-point temperature analyzer cooling duct is generally 15～17mm, the width a of the utility model analyzer cooling-water duct 24 can be reduced to 2～3mm, and it is less that the volume of acid dew-point temperature analyzer can be done, and operation is carried more convenient.
Described acid dew-point temperature analyzer probe unit has two interior electrodes 13 parallel to each other and external electrode 7, two electrode front ends are embedded on the surface of pyroceram 21 through rear shrouding 6, front shrouding 18, between inside and outside electrode and rear shrouding, be provided with insulator 14, between inside and outside electrode and front shrouding, cooling-water duct, be also provided with insulator.The front end of interior electrode 13 forms " one " font metallic thermocouple (Pt13%Rh/Pt) on pyroceram 21 surfaces, be used for measuring the surface temperature of pyroceram 21, the front end of external electrode 7 forms a ring round thermopair, referring to accompanying drawing 2 pyroceram front elevations on pyroceram 21 surfaces.As long as the surface of pyroceram 21 has sorrel 19 to form, because sorrel 19 has electric conductivity, between interior electrode 13 and external electrode 7, just there is electric current to pass through, during work when forming stable sorrel 19 between two electrodes, the synthesis rate of acid is zero, between interior electrode 13 and external electrode 7, by having stable electric current, pass through, the temperature that now interior electrode 13 measures is the acid dew-point temperature value of flue gas 20.
The material of described acid dew-point temperature analyzer probe unit inner tube 16 used, outer tube 17, front shrouding 18 is heat-resistance stainless steel, general heating furnace or regenerator of catalytic unit flue-gas temperature be below 500 ℃, and the material of heat-resistance stainless steel used and pyroceram 21 is 500 ℃ of heatproofs at least.
The water cooling unit of described acid dew-point temperature analyzer, in flue 22 operate outside, is provided with tank 1, chilled water 2, water pipeline 3 and by-pass valve control 4.Tank 1 is integrated the stainless steel metal container of long-pending 3～5L, due to the water of unit volume than pressurized air (25 ℃, 2～3kgf/cm
2) can absorb more heat, general 3L water can complete the measurement of a working point.During work, tank 1 need be placed in to the top position of rising pipe 15, under unpowered state, chilled water 2 can rely on gravity to realize flowing in cooling-water duct 24, press the direction of arrow shown in Fig. 1 flows out in tank 1, through water pipeline 3, by-pass valve control 4 and water inlet pipe 5, enter cooling-water duct 24, finally from rising pipe 15, discharge.Chilled water 2 is the frozen water of 0 ℃, while starting to measure, pours tank 1 into standby.By-pass valve control 4 is for controlling keying and the flow of chilled water 2.
The main frame 9 of described acid dew-point temperature analyzer is realized and being controlled and measuring ability, is provided with reometer 8, thermo detector 10, controller 12 and control circuit 11, and reometer 8, thermo detector 10 and controller 12 all pass through control circuit 11 and be connected.Reometer 8 is connected with interior electrode 13, external electrode 7, when stable sorrel 19 forms, the electric current in reometer 8 will be tending towards a stationary value, and reometer 8 sends the signal that can measure to controller 12 by control circuit 11, controller 12 is received measuring-signal, to thermo detector 10, sends thermometric instruction.Controller 12 typically uses PLC (programmable controller), and reometer 8 and thermo detector 10 all can use industrial conventional, and those skilled in the art can select by general knowledge.
Below in conjunction with accompanying drawing, operating process of the present utility model is described:
(1) closing control valve 4, tank 1 are placed in to the top position of rising pipe 15, pour 0 ℃ of appropriate frozen water into standby;
(2) by the probe unit of acid dew-point temperature analyzer, the instrument connection from heating furnace or regenerator of catalytic unit walling of flue 23 extend in flue gas 22, and makes the surface of pyroceram 21 be placed in the primary air position of flue gas 22.After approximately 5 minutes, the temperature of the surface temperature of pyroceram 21 and flue gas 22 reaches consistent;
(3) opening controlling valve door 4, and chilled water 2 dependence gravity are pressed the direction of arrow shown in Fig. 1 and flowed in cooling-water duct 24, and cooling pyroceram 21, along with pyroceram 21 surface temperatures reduce, starts at its surface sweating containing acid fume gas 22;
(4), after the control and detection by main frame 9, on thermo detector 10, show the acid dew-point temperature value of flue gas 22.
Claims (5)
1. an acid dew-point temperature analyzer, comprise probe unit, water cooling unit and main computer unit, it is characterized in that: described probe unit stretches into flue work, be provided with inner tube, outer tube, pyroceram, front shrouding, rear shrouding, interior electrode, external electrode, wherein both end coaxial welding of inner and outer tubes are on rear shrouding, inner tube front end is sealed by front shrouding, outer tube front end is sealed by pyroceram, between the interlayer of inner and outer tubes and front shrouding and pyroceram, form cooling-water duct, on outer tube, be provided with water inlet pipe and the rising pipe of chilled water; Interior electrode parallel to each other and external electrode one end are embedded on the surface of pyroceram through rear shrouding, front shrouding, and the other end is connected with main computer unit; Water cooling unit, in flue operate outside, is connected with outer tube; Main computer unit is realized and being controlled and measuring ability.
2. acid dew-point temperature analyzer according to claim 1, is characterized in that: described water cooling unit is provided with tank, cooling water pipeline, by-pass valve control, cooling water pipeline one end connection water channel, and the other end is connected with the water inlet pipe on outer tube by by-pass valve control.
3. acid dew-point temperature analyzer according to claim 1, it is characterized in that: described main computer unit is provided with reometer, thermo detector, controller, described reometer is connected by control circuit with thermo detector, and reometer is connected with controller by control circuit separately with thermo detector.
4. acid dew-point temperature analyzer according to claim 1, is characterized in that: the width of described cooling-water duct is 2～3mm.
5. acid dew-point temperature analyzer according to claim 1, is characterized in that: between described inside and outside electrode and rear shrouding, be provided with insulator, between described inside and outside electrode and front shrouding, cooling-water duct, be provided with insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320463945.8U CN203455083U (en) | 2013-07-24 | 2013-07-24 | Acid dew point temperature tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320463945.8U CN203455083U (en) | 2013-07-24 | 2013-07-24 | Acid dew point temperature tester |
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| CN203455083U true CN203455083U (en) | 2014-02-26 |
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| CN201320463945.8U Expired - Fee Related CN203455083U (en) | 2013-07-24 | 2013-07-24 | Acid dew point temperature tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142192A (en) * | 2014-05-14 | 2014-11-12 | 湘潭大学 | Real-time high-temperature flue-gas temperature measurement device |
| CN104483348A (en) * | 2014-12-18 | 2015-04-01 | 山东大学 | Portable engineering application acid dew point measuring device |
| CN106016882A (en) * | 2016-07-14 | 2016-10-12 | 苏州璟越自动化有限公司 | Automatic anti-drying water-cooling structure |
| CN113834854A (en) * | 2021-09-23 | 2021-12-24 | 上海轻叶能源股份有限公司 | Air bath flue gas acid dew point temperature monitoring system |
| CN117491425A (en) * | 2024-01-03 | 2024-02-02 | 东方华瑞(成都)科技开发有限责任公司 | Detection device for flue gas acid dew point |
-
2013
- 2013-07-24 CN CN201320463945.8U patent/CN203455083U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142192A (en) * | 2014-05-14 | 2014-11-12 | 湘潭大学 | Real-time high-temperature flue-gas temperature measurement device |
| CN104483348A (en) * | 2014-12-18 | 2015-04-01 | 山东大学 | Portable engineering application acid dew point measuring device |
| CN106016882A (en) * | 2016-07-14 | 2016-10-12 | 苏州璟越自动化有限公司 | Automatic anti-drying water-cooling structure |
| CN106016882B (en) * | 2016-07-14 | 2018-10-23 | 汪辉 | A kind of anti-drying automatic water-cooling cooling structure |
| CN113834854A (en) * | 2021-09-23 | 2021-12-24 | 上海轻叶能源股份有限公司 | Air bath flue gas acid dew point temperature monitoring system |
| CN113834854B (en) * | 2021-09-23 | 2023-12-29 | 上海轻叶能源股份有限公司 | Acid dew point temperature monitoring system for air bath flue gas |
| CN117491425A (en) * | 2024-01-03 | 2024-02-02 | 东方华瑞(成都)科技开发有限责任公司 | Detection device for flue gas acid dew point |
| CN117491425B (en) * | 2024-01-03 | 2024-03-08 | 东方华瑞(成都)科技开发有限责任公司 | Detection device for flue gas acid dew point |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 |