CN2578757Y - Constant temperature heating furnaces - Google Patents
Constant temperature heating furnaces Download PDFInfo
- Publication number
- CN2578757Y CN2578757Y CN 02280882 CN02280882U CN2578757Y CN 2578757 Y CN2578757 Y CN 2578757Y CN 02280882 CN02280882 CN 02280882 CN 02280882 U CN02280882 U CN 02280882U CN 2578757 Y CN2578757 Y CN 2578757Y
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- heating furnace
- salt
- furnace
- fair water
- water sleeves
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Abstract
The utility model discloses a constant temperature salt bath type heating furnace which comprises a flow guiding sleeve barrel, a support frame, an electric heating rod, a reactor, a heating furnace casing, a thermocouple, melted salt, a heat insulating layer, etc., wherein the flow guiding sleeve barrel is arranged between the reactor and the heating furnace barrel body, the upper edge is lower than the liquid surface of the melted salt, and the lower edge has a certain distance from the bottom of the heating furnace. Compared with the prior art, the heating furnace of the utility model has the advantages that the isothermal zone of the heating furnace is longer than that of an electric heating furnace with the same length, and the temperature difference of the constant temperature zone is small; the heating furnace has simple structure, no need of stirrers, investment saving and convenient operation; the heating furnace has high heating speed and high cooling speed, and is suitable for catalysts for a quick evaluation test.
Description
1, technical field
The utility model belongs to a kind of thermostatic type heating furnace, and what particularly be applicable to the petrochemical process experimental provision melts salt formula thermostatic oven.
2, background technology
Melting salt formula heating furnace is by the salts substances that melts required heating container to be heated, because general salt melt temperature is higher, is mainly used in the high-temperature technology condition so melt salt formula heating furnace.
It is higher to face the general temperature of hydrogen technological reaction process.In the hydropyrolysis experiment device, reactor is heated two kinds of modes below the main employing at present, a kind of is the multistage electric furnace, the shortcoming of this heating furnace is: heating furnace adopts the control of multistage temperature, temperature control loop is many, and the isothermal region internal difference in temperature is bigger, the electric cooker structure complexity, difficult in maintenance, in case electric furnace is out of control, the temperature raising speed is exceedingly fast, and security is relatively poor.
Another kind of for melting salt formula heating furnace, as employed heating furnace in the small-sized hydropyrolysis experiment device of U.S. Xtyel company, this heating furnace has characteristics such as temperature control mode is simple, and isothermal region is longer in the stove, and temperature even (± 1 ℃), and is simple in structure, and fault rate is low.Shortcoming is must be equipped with agitator in the stove just can make and melt the salt uniformity of temperature profile in the stove, because the stove volume increased after agitator was installed, make and melt the increase of salt loading in the stove, and causing melting the salt Temperature Distribution, the increase of melting the salt amount all the more is difficult to evenly, in case agitator is malfunctioning, Temperature Distribution differs bigger in the whole stove, can't carry out required isothermal reaction.This heating furnace cooling rate is too slow simultaneously, be unfavorable for the quick evaluation test to catalyst, and cost is higher.
3, summary of the invention
At the deficiencies in the prior art, it is a kind of simple in structure, with low cost that the utility model provides, and volume is little, and result of use is good, the salt bath formula thermostatic oven of being convenient to operate.
The heating furnace that the utility model provides comprises: heating furnace housing, fair water sleeves, support, electrically heated rod, thermocouple, fused salt, heat-insulation layer etc.Wherein heat-insulation layer is coated on outside the salt bath furnace, and salt bath furnace is a tubular structure, and the cross section can be preferably circle for various suitable shape.Fair water sleeves is empty barrel structure, and the cross section is preferably identical with the salt bath furnace cross sectional shape, and fair water sleeves places in the salt bath furnace, below by stent support, at the bottom of fair water sleeves lower limb and the salt bath furnace certain distance is arranged, and the fair water sleeves top edge is positioned at and melts under the salt liquid level.Electrically heated rod is preferably disposed between salt bath furnace and the fair water sleeves, and thermocouple is preferably disposed within the fair water sleeves.
Thermostatic oven of the present utility model is simple in structure, saves agitating device and corresponding power and control device, and under the reactor same case, the heating furnace volume is little, can reduce cost.The utility model needn't add stirring system in addition, and is simple to operate, and fault rate is low.The fused salt consumption is few, in the cost-effective while, can reach and improve the speed that rises (falling) temperature, saves experimental period, raises the efficiency.
4, description of drawings
Fig. 1 is the utility model thermostatic oven structural representation.Wherein 1 is fair water sleeves, and 2 is support, and 3 is electrically heated rod, and 4 is reactor, and 5 is salt bath furnace, and 6 is thermocouple, and 7 for melting salt, and 8 is heat-insulation layer.
5, the specific embodiment
Specify the structure and the course of work of the utility model thermostatic oven below in conjunction with accompanying drawing.
The typical structure of the utility model thermostatic oven is: columniform salt bath furnace 5, the outside coats heat-insulation layer 8, reactor 4 is positioned at salt bath furnace 5 central authorities, fair water sleeves 1 is divided into the upper and lower two parts space that links with salt bath furnace 5, the loadings of melting salt 7 is higher than the top edge of fair water sleeves 1, fair water sleeves 1 is supported by support 2, certain space is arranged at the bottom that makes it bottom and salt bath furnace 5, melting salt 7 can flow through, electrically heated rod 3 can be several, uniform distribution is between salt bath furnace 5 and fair water sleeves 1, and thermocouple 6 is arranged on the space between fair water sleeves 1 and the reactor 4.
The utility model device is according to following principle work, and after electrically heated rod 3 was started working, the salt 7 that melts in the heating furnace 5 began to melt gradually, and before melting the whole thawings of salt, the heat transmission of melting between the salt mainly is by the heat conduction, after melting the whole thawings of salt in the stove.Owing at first be heated and melt near the salt that melts around the heating rod 3, its temperature is higher than the temperature that the fair water sleeves internal layer melts salt, owing to melt salt density difference when different temperature, force and melt salt and do from bottom to top circulation movement around fair water sleeves, the salt that melts that temperature is high in heating furnace continues to flow to the low place of stability like this, finally forms circulation movement clocklike.Because circulation movement constantly carries out, the temperature around the reactor is tending towards equal perseverance gradually, reaches the effect of constant temperature.
The utility model can strengthen the constant temperature effect of heating furnace by the appropriate design following parameters:
1. select to melt salt mainly by following requirement: at the hydropyrolysis experiment process conditions, the melt temperature of selecting to melt salt is below 150 ℃, 600 ℃ not volatile, the coefficient of expansion is less, the proportion that melts salt during high low temperature differs and is the bigger the better.Suitable is the mixture of nitrate and nitrite, and weight ratio is 1: 1～1: 2 when preferably selecting normal temperature.
2. the control thermocouple position of installing is in guide shell, and is positioned at the centre position of cylindrical shell and reactor outer wall as far as possible.Can accelerate adjustment speed in the process of the test like this.
3. the heating furnace housing is under situation about allowing, and selects a little bit smallerly as far as possible, and fair water sleeves and spacing between reactor outer wall and the stove inwall remain in 1: 1～1: 3 the scope simultaneously, make and melt the flowing velocity increasing of salt between fair water sleeves and reactor.
4. electrically heated rod immerses the part of melting in the salt, and its power distributes and should distribute in gradient, and from top to bottom power increases gradually.
5. concentric with reactor as far as possible when fair water sleeves is installed, end distance furnace bottom height 50～100mm under the sleeve, the upper end should be lower than melts the salt liquid level and can flow freely into the sleeve internal layer so that melt salt.
Claims (10)
1, a kind of thermostatic oven, comprise heating furnace housing, electrically heated rod, thermocouple, melt salt, heat-insulation layer, wherein heat-insulation layer is coated on outside the salt bath furnace, salt bath furnace is a tubular structure, it is characterized in that being provided with in the heating furnace fair water sleeves and support thereof, fair water sleeves places in the salt bath furnace, below by stent support, at the bottom of fair water sleeves lower limb and the salt bath furnace certain distance is arranged, the fair water sleeves top edge is positioned at and melts under the salt liquid level, electrically heated rod is arranged between salt bath furnace and the fair water sleeves, and thermocouple is arranged within the fair water sleeves.
2,, it is characterized in that described salt bath furnace cross section is for circular according to the described heating furnace of claim 1.
3, according to the described heating furnace of claim 1, it is characterized in that described fair water sleeves is empty barrel structure, the cross section is identical with the salt bath furnace cross sectional shape.
4,, it is characterized in that the described mixture that salt is nitrate and nitrite that melts according to the described heating furnace of claim 1.
5,, it is characterized in that the described salt that melts is that weight ratio is the nitrate and the nitrite mixture of 1: 3～3: 1 scopes according to the described heating furnace of claim 4.
6,, it is characterized in that the cylindrical shell of position in guide shell and the centre position of reactor outer wall that described thermocouple is installed according to the described heating furnace of claim 1.
7,, it is characterized in that the spacing between described fair water sleeves and reactor outer wall and the stove inwall is 1: 1～1: 3 according to the described heating furnace of claim 1.
8, according to the described heating furnace of claim 1, it is characterized in that described electrically heated rod immerses the part of melting among the salt, its power distributes and distributes in gradient, and from top to bottom power increases gradually.
9, according to the described heating furnace of claim 1, it is characterized in that described fair water sleeves and reactor are concentric, end distance furnace bottom height is 50～100mm under the sleeve.
10, according to the described heating furnace of claim 1, heating rod wherein can adopt varying number as required, but good evenly to be distributed as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280882 CN2578757Y (en) | 2002-11-02 | 2002-11-02 | Constant temperature heating furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280882 CN2578757Y (en) | 2002-11-02 | 2002-11-02 | Constant temperature heating furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578757Y true CN2578757Y (en) | 2003-10-08 |
Family
ID=33743489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02280882 Expired - Fee Related CN2578757Y (en) | 2002-11-02 | 2002-11-02 | Constant temperature heating furnaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578757Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131321A (en) * | 2010-12-09 | 2011-07-20 | 机械工业第一设计研究院 | Heating device for electrochemstry cleaning salt bath furnace |
| CN107008218A (en) * | 2017-05-18 | 2017-08-04 | 迈瑞尔实验设备（上海）有限公司 | A kind of internal heat type salt bath reactor |
| CN109520301A (en) * | 2018-12-17 | 2019-03-26 | 迈瑞尔实验设备（上海）有限公司 | A kind of parallel reactor salt bath heating furnace |
-
2002
- 2002-11-02 CN CN 02280882 patent/CN2578757Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131321A (en) * | 2010-12-09 | 2011-07-20 | 机械工业第一设计研究院 | Heating device for electrochemstry cleaning salt bath furnace |
| CN107008218A (en) * | 2017-05-18 | 2017-08-04 | 迈瑞尔实验设备（上海）有限公司 | A kind of internal heat type salt bath reactor |
| CN109520301A (en) * | 2018-12-17 | 2019-03-26 | 迈瑞尔实验设备（上海）有限公司 | A kind of parallel reactor salt bath heating furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031008 Termination date: 20111102 |