CN205020056U - Formaldehyde oxidizer with high -efficient heat transfer of two -stage - Google Patents
Formaldehyde oxidizer with high -efficient heat transfer of two -stage Download PDFInfo
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- CN205020056U CN205020056U CN201520477654.3U CN201520477654U CN205020056U CN 205020056 U CN205020056 U CN 205020056U CN 201520477654 U CN201520477654 U CN 201520477654U CN 205020056 U CN205020056 U CN 205020056U
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- heat exchange
- oxidation
- gas
- formaldehyde
- inner housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses a formaldehyde oxidizer with high -efficient heat transfer of two -stage, it includes oxidation panel and cooling zone, has gas feed on the oxidation panel, has the gas outlet on the cooling zone, and wherein the methane that produces of oxidation panel walks cooling zone shell side, coolant and walks the cooling zone tube side, and the cooling zone adopts the two -stage heat transfer, including first order heat transfer and second level heat transfer, and adopt different heat transferring mediums in the tube side of two -stage heat transfer, interior casing comprises ceramic material. The utility model discloses a formaldehyde oxidizer has solved poor, the shortcomings such as loading and unloading capacity is limited, easy scale deposit of current formaldehyde oxidizer heat transfer ability.
Description
Technical field
The utility model relates to a kind of chemical production device, especially relates to a kind of oxidation of formaldehyde device with two-stage high efficient heat exchanging.
Background technology
The production method of industrial formol comprises Yin Fa and iron molybdenum method, and the former is due to dominate in its small investment, power consumption is low, production cost is low advantage at home Formaldehyde Production.The basic procedure that silver method produces formaldehyde is: enter reactor after methanol gas, air and batching steam, under the effect of silver catalyst, gaseous mixture reacts, and generates formaldehyde gas.Because formaldehyde at high temperature easily decomposes, reduce formaldehyde yield, therefore gaseous product must cool as early as possible, and cooled formaldehyde gas enters absorption tower and is absorbed by liquid absorption and then produces heat, in order to ensure proceeding of production, the low-quality heat of this part must be removed.
The oxidation of formaldehyde device of present stage is divided into two-part oxidation of formaldehyde device and syllogic oxidation of formaldehyde device, such as, is described in more detail above-mentioned two kinds of oxidators in " design of novel methylene oxidation reactor " literary composition.But no matter two-part oxidation of formaldehyde device or syllogic oxidation of formaldehyde device, it is all adopt that formaldehyde makes tube side leave with rage and cooling water walks shell side at cooling section.But the consequence of above-mentioned design has defect:
First, in order to ensure heat exchange efficiency, the mass flow walking the formaldehyde gas of tube side must control within the specific limits, and when flow exceeds this scope, heat exchange efficiency is difficult to be guaranteed thus causes the generation of byproduct formic acid.
Secondly, by the restriction of formaldehyde gas mass flow, for same oxidator, its output capacity is limited, can not adjust the output of formaldehyde products as required flexibly.
In addition, adopt cooling water as heat transferring medium, cooling water easily causes shell side fouling, needs to spend a large amount of manpower and materials for heat exchanger scale removal.
Summary of the invention
For above-mentioned Problems existing and defect, the utility model provides a kind of Novel formaldehyde oxidizer, solves the shortcomings such as existing oxidation of formaldehyde device exchange capability of heat is poor, production capacity is limited, easy fouling.
The utility model is by the following technical solutions:
A kind of oxidation of formaldehyde device with two-stage high efficient heat exchanging, it comprises oxidation panel and cooling section, oxidation panel has gas feed, cooling section has gas vent, it is characterized in that: the formaldehyde that oxidation panel produces makes cooling section shell side leave with rage, cooling medium walks cooling section tube side, cooling section adopts two-stage heat exchange, comprise first order heat exchange and second level heat exchange, and two-stage heat exchange adopts different heat transferring mediums.Here, adjustable for ensureing the mass flow of formaldehyde gas, we are creationary makes traditional formaldehyde leave with rage tube side, the thinking that cooling water walks shell side is overturned, select to make formaldehyde leave with rage shell side, cooling medium walks tube side, and be ensure further in fixing heat exchange area, to improve cooling quality to avoid the generation of byproduct formic acid, we are creationary again replaces to two-stage by heat exchanging segment by one-level, simultaneously, for ensureing that formaldehyde gas fluctuates in large mass flow range, we specially select in two-stage heat exchange, adopt different heat transferring mediums at utmost to ensure all can realize ideal heat transfer effect at the formaldehyde gas of any mass flow.
Wherein, described oxidation of formaldehyde utensil has the shell body of closed at both ends, cooling section has the inner housing of annular, first order heat exchange and second level heat exchange are separated by described inner housing, and realizing the gas connection of gas between first order heat exchange and second level heat exchange by the gas connectivity part of inner housing bottom, described gas vent is positioned at cooling section upper end; Described inner housing is made up of ceramic material.Here we limit the setting of two-stage heat exchange, because this restriction can increase the flow path of formaldehyde gas preferably, at utmost to ensure heat exchange efficiency.And when adopting different materials to prepare inner housing, our surprised discovery is when it is prepared by ceramic material, heat transfer effect and final product the best, on the one hand influence each other because the exchange capability of heat of pottery can to a certain degree stop between two-stage heat exchange lower than common metal, but because pottery has certain capacity of heat transmission, relatively low heat exchange between two-stage heat exchange facilitates the increase of first order exchange capability of heat on the contrary, thus has pulled the exchange capability of heat of whole cooling section on the whole.
Wherein, described gas connectivity part is the annular opening arranged in described inner housing bottom or the multiple perforates arranged in inner housing bottom, wherein percent opening scope is 50-100%, and described perforate can be selected from circle, semicircle, strip, grill-shaped, square, triangle.Annular opening is mode of communicating the most common, because which processing is relatively simple, but more preferably in the perforate of inner housing bottom, it, except realizing the connection of gas between two-stage heat exchange, also can realize the effect of even gas distribution, better to realize heat transfer effect.
Wherein, the heat exchanger tube that described first order heat exchange adopts is vertical single-row or multiple row serpentine coil, when selecting multiple row serpentine coil, the distance between multiple row coil pipe diminishes gradually from centre to two ends, and the heat exchanger tube that described second level heat exchange adopts is annular coil pipe.Here, take full advantage of the regional characteristics that two-stage heat exchange is different, at first order heat exchanging segment, it is cylindrical, therefore it is selected to be vertical serpentine coil, coil pipe columns can select single-row or multiple row, and when selecting single-row, this coil pipe is preferably in inner housing middle position, when selecting multiple row coil pipe, the distance between preferred multiple row coil pipe diminishes gradually from centre to two ends.And due to heat exchange area, the second level be annular, therefore select second level heat transmission equipment to be annular coil pipe, it coils around inner housing, therefore at utmost can ensure heat transfer effect.
Wherein, described inner housing is 20-80% with the diameter ratio of described shell body.For at utmost optimizing the best heat exchange property of two-stage heat exchange, through analog computation, preferred inner housing is 20-80% with the diameter ratio of described shell body.When lower than or when exceeding this value, its heat exchange property all can not obtain good guarantee.
Wherein, between described oxidation panel and first order heat exchange, gas distributor is provided with.The object arranging gas distributor is that the gas ensureing to enter first order heat exchange can uniform distribution.
Wherein, the blocking material between described oxidation panel and second level heat exchange is coated with heat-insulating material, gas connectivity part and second level heat exchange intersection are provided with the gas baffle be obliquely installed.The object of coating heat-insulating material is to prevent the low temperature of the high temperature of oxidation panel and second level heat exchange from interacting.And the existence of gas baffle 14 facilitates gas from first order heat exchange to the transition of second level heat exchange.
Wherein, first order heat exchange adopts refrigerated brine, and second level heat exchange adopts cooling water.Certainly, although define two-stage heat exchange to adopt different heat transferring mediums, but those skilled in the art should be understood that, " identical " and " difference " described here not only refers to the type of heat transferring medium, the also physicochemical property such as temperature, concentration of a replacement thermal medium, such as, first order heat exchange and second level heat exchange can be cooling water simultaneously, just temperature difference to some extent.Certainly, as preferably, we select first order heat exchange to adopt refrigerated brine as cooling medium, and second level heat exchange adopts cooling water as heat transferring medium.
The main component of described pottery is aluminium oxide, silica, titanium oxide.
In addition, present invention also provides and a kind ofly utilize above-mentioned oxidation of formaldehyde device to carry out the technique of oxidation of formaldehyde, it is characterized in that the formaldehyde gas that oxidation panel generates walks shell side at cooling section, cooling medium walks tube side at cooling section.
Wherein, unstrpped gas enters oxidation panel from the gas feed of oxidation panel, formaldehyde gas is produced through catalytic oxidation, gas connectivity part from inner housing end after described formaldehyde gas enters first order heat exchange after being uniformly distributed by gas distributor enters second level heat exchange, and carries out the formaldehyde gas after two-stage heat exchange from the gas vent discharge being positioned at cooling section upper end.
The beneficial effects of the utility model are:
First, overturn that traditional oxidation of formaldehyde device formaldehyde makes tube side leave with rage, cooling medium walks shell side, the mass flow better controlling formaldehyde gas on a large scale can be realized, can not because of the fluctuation alternative of product;
Secondly, adopt two-stage heat exchange at utmost to ensure that the cooling effect of formaldehyde gas, well avoid the generation of byproduct formic acid;
Again, by by cooling medium, comprise cooling water and walk tube side, thus farthest reduce the possibility of fouling, reduce maintenance and maintenance cost.
Accompanying drawing explanation
In conjunction with the accompanying drawings and embodiments the utility model is further illustrated:
Fig. 1 is oxidation of formaldehyde device schematic diagram of the present utility model
Fig. 2 is the sectional view at the oxidation of formaldehyde device A-A place shown in Fig. 1
In figure, 1-shell body, 2-inner housing, 3-gas feed, 4-gas vent, 5-oxidation panel, the heat exchange of the 6-second level, 7-gas distributor, 8-serpentine coil, 9-annular coil pipe, 10-gas connectivity part, the heat exchange of the 11-first order, 12-cooling section, 13-cuts off, 14-gas baffle.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Now in conjunction with the accompanying drawings and embodiments to the utility model and further detailed description.This accompanying drawing is the schematic diagram simplified, and only essential structure of the present utility model is described in a schematic way, therefore it only shows the formation relevant with the utility model.
A kind of oxidation of formaldehyde device with two-stage high efficient heat exchanging, it comprises oxidation panel 5 and cooling section 12, oxidation panel has gas feed 3, cooling section has gas vent 4, the formaldehyde that oxidation panel produces makes cooling section shell side leave with rage, cooling medium walks cooling section tube side, cooling section adopts two-stage heat exchange, comprise first order heat exchange 11 and second level heat exchange 6, and two-stage heat exchange adopts different heat transferring mediums, wherein, first order heat exchange adopts refrigerated brine, and second level heat exchange adopts cooling water.Oxidation of formaldehyde utensil has the shell body 1 of closed at both ends, cooling section has the inner housing 2 of annular, inner housing is prepared from by aluminium oxide ceramics, first order heat exchange 11 and second level heat exchange 6 are separated by inner housing, and realize the gas connection of gas between first order heat exchange and second level heat exchange by the gas connectivity part 10 of inner housing bottom, and gas vent is positioned at cooling section upper end.Gas connectivity part is the annular opening arranged in described inner housing bottom or the multiple perforates arranged in inner housing bottom, and wherein percent opening scope is 80%, and perforate is circular.The heat exchanger tube that first order heat exchange adopts is five row serpentine coils 8, and the distance between row row coil pipe diminishes gradually from centre to two ends, and the heat exchanger tube that second level heat exchange adopts is annular coil pipe.Inner housing 8 is 50% with the diameter ratio of shell body 1.Gas distributor 7 is provided with between oxidation panel 5 and first order heat exchange 11.Partition 13 between oxidation panel 5 and second level heat exchange 6 is coated with heat-insulating material.Gas connectivity part 10 and second level heat exchange 6 intersection are provided with the gas baffle 14 be obliquely installed.
In addition, a kind ofly utilize above-mentioned oxidation of formaldehyde device to carry out the technique of oxidation of formaldehyde, its main speciality is that the formaldehyde gas that oxidation panel generates walks shell side at cooling section, and cooling medium walks tube side at cooling section.Unstrpped gas enters oxidation panel 5 from the gas feed 3 of oxidation panel 5, formaldehyde gas is produced through catalytic oxidation, enter second level heat exchange 6 from the gas connectivity part 10 of inner housing 2 end after formaldehyde gas enters first order heat exchange 11 after gas distributor 7 is uniformly distributed, and carry out the formaldehyde gas after two-stage heat exchange and discharge from the gas vent 4 being positioned at cooling section 12 upper end.
The foregoing is only most preferred embodiment of the present utility model, be not limited to the utility model.All make within principle of the present utility model and spirit any amendment, equivalent replacement, improvement etc., all should be included in protection domain of the present utility model.
Claims (7)
1. one kind has the oxidation of formaldehyde device of two-stage high efficient heat exchanging, it comprises oxidation panel and cooling section, oxidation panel has gas feed, cooling section has gas vent, it is characterized in that: the formaldehyde that oxidation panel produces makes cooling section shell side leave with rage, cooling medium walks cooling section tube side, cooling section adopts two-stage heat exchange, comprises first order heat exchange and second level heat exchange, and adopts different heat transferring mediums in the tube side of two-stage heat exchange; Described oxidation of formaldehyde utensil has the shell body of closed at both ends, cooling section has the inner housing of annular, first order heat exchange and second level heat exchange are separated by described inner housing, and realizing the gas connection of gas between first order heat exchange and second level heat exchange by the gas connectivity part of inner housing bottom, described gas vent is positioned at cooling section upper end; Described inner housing is made up of ceramic material.
2. oxidation of formaldehyde device according to claim 1, it is characterized in that: described gas connectivity part is the annular opening arranged in described inner housing bottom or the multiple perforates arranged in inner housing bottom, wherein percent opening scope is 50-100%, and described perforate can be selected from circle, semicircle, strip, grill-shaped, square, triangle.
3. oxidation of formaldehyde device according to claim 1, it is characterized in that: the heat exchanger tube that described first order heat exchange adopts is vertical single-row or multiple row serpentine coil, when selecting multiple row serpentine coil, distance between multiple row coil pipe diminishes gradually from centre to two ends, and the heat exchanger tube that described second level heat exchange adopts is annular coil pipe.
4. oxidation of formaldehyde device according to claim 1, is characterized in that: described inner housing is 20-80% with the diameter ratio of described shell body.
5. oxidation of formaldehyde device according to claim 1, is characterized in that: between described oxidation panel and first order heat exchange, be provided with gas distributor.
6. oxidation of formaldehyde device according to claim 1, is characterized in that: the blocking material between described oxidation panel and second level heat exchange is coated with heat-insulating material, and gas connectivity part and second level heat exchange intersection are provided with the gas baffle be obliquely installed.
7. oxidation of formaldehyde device according to claim 1, is characterized in that: first order heat exchange adopts refrigerated brine, and second level heat exchange adopts cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520477654.3U CN205020056U (en) | 2015-07-03 | 2015-07-03 | Formaldehyde oxidizer with high -efficient heat transfer of two -stage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520477654.3U CN205020056U (en) | 2015-07-03 | 2015-07-03 | Formaldehyde oxidizer with high -efficient heat transfer of two -stage |
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| CN205020056U true CN205020056U (en) | 2016-02-10 |
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| CN201520477654.3U Expired - Fee Related CN205020056U (en) | 2015-07-03 | 2015-07-03 | Formaldehyde oxidizer with high -efficient heat transfer of two -stage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311091A (en) * | 2015-07-03 | 2017-01-11 | 常州乔尔塑料有限公司 | Formaldehyde oxidation reactor with two stage high efficiency heat exchange |
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2015
- 2015-07-03 CN CN201520477654.3U patent/CN205020056U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311091A (en) * | 2015-07-03 | 2017-01-11 | 常州乔尔塑料有限公司 | Formaldehyde oxidation reactor with two stage high efficiency heat exchange |
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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 |
Granted publication date: 20160210 Termination date: 20210703 |
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| CF01 | Termination of patent right due to non-payment of annual fee |