CN200947003Y - Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device - Google Patents
Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device Download PDFInfo
- Publication number
- CN200947003Y CN200947003Y CN 200720103460 CN200720103460U CN200947003Y CN 200947003 Y CN200947003 Y CN 200947003Y CN 200720103460 CN200720103460 CN 200720103460 CN 200720103460 U CN200720103460 U CN 200720103460U CN 200947003 Y CN200947003 Y CN 200947003Y
- Authority
- CN
- China
- Prior art keywords
- oxidation reactor
- tube sheet
- oxidator
- formaldehyde
- perforated plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a tube plate of methanol oxidation reactor, which is made up of an upper tube plate and a lower tube plate. The utility model is characterized in that the upper tube plate is sub-flat tube plate with radian, which is composed of an upper end formed by two turnup ends and a lower end treated as incompletely-flat part. The lower tube plate is flat. The upper end of the upper tube plate is integrated with inner wall of principal cylinder of oxidator of the methanol oxidation reactor through welding, and the lower end of the upper tube plate is connected with upper end of heat exchanging tube of the methanol oxidation reactor. For the upper tube plate is sub-flat tube plate with radian, the upper tube plate has adequate expansion space, which overcomes stress crack caused by high temperature difference and solves the problem of stress corrosion for boiler section caused by residual heat of the oxdiator, which bewilders technicians for long time.
Description
Technical field
The utility model relates to a kind of tube sheet of stationary heat exchangers, particularly the tube sheet of the tube sheet of stationary heat exchangers, formaldehyde oxidation reactor and tube sheet device.
Background technology
Formaldehyde oxidation reactor is the key equipment of Formaldehyde Production, and its quality will be directly connected to the quality of product quality, influences the raising of economic benefit.The major function of oxidator is that methanol oxidation generates formaldehyde gas, reclaims the reaction gas heat and cools off reaction gas.
At present, domestic formolite reaction device mainly contains two-period form and two kinds of structures of syllogic.The two-period form oxidation reactor is made up of upper and lower two parts, and top is conversion zone, and methyl alcohol, air, water vapour three-element mixed gas body oxidation reaction take place generate formaldehyde gas when entering by the catalyst layer of electric furnace igniting heating; The bottom is a cooling section, and the high temperature formaldehyde gas that reaction generates is sent in this water cooling that is cooled, and cooling water discharges under normal pressure, though reached cooling purpose, the technology waste heat is not utilized, and has wasted a large amount of heat energy, and has consumed a large amount of cooling waters.Up to the present, the two-period form formaldehyde oxidation reactor progressively is eliminated.
Syllogic oxidation of formaldehyde device is made up of three parts, and epimere is an oxidation panel, and the stage casing is the waste heat recovery section, and hypomere is the gas cooled section.The effect of epimere oxidation panel is identical with the two-period form oxidator; The effect of stage casing waste heat recovery section is the mode by heat exchange, utilizes the heat energy of high temperature formaldehyde gas to produce low-pressure steam; The effect of hypomere cooling section is that the formaldehyde gas that will come from the waste heat recovery section is cooled to below 100 degree.The syllogic oxidation reactor has made full use of the technology waste heat, and effect is remarkable aspect energy-conservation, water saving.But this reactor condition of work is worsened, waste heat recovery section tube sheet on high temperature side, the connecting portion of tube sheet and heat exchanger tube is in (temperature is up to the 550-650 degree) under the high temperature, should bear pressure, be subjected to the impact and the corrosion of high temperature, high-speed gas again, the tube-to-tube sheet connection junction is very easily damaged, austenitic stainless steel is higher than 525 when spending in serviceability temperature in addition, the intensity of material, plasticity and non-oxidizability significantly descend, cause breakage to repair, cause service life of equipment short, economic benefit can not get performance.
Fig. 6 has shown a kind of existing syllogic oxidation of formaldehyde device, comprising: convection tube 101; Housing 102; Heat exchanger tube 103; Steam (vapor) outlet 104; Upper perforated plate 105; Inner barrel 106; Catalyst layer 107; Quaternary gaseous mixture inlet 108; Deflection plate 109; Red copper bar 110; End socket 111; Oxidizing chamber 112; Take over 113; Vessel flange 114; Copper mesh 115; The hot water inlet 116; Take over 117; Lower perforated plate 118; Formaldehyde gas outlet 119.
Fig. 7 has shown the annexation of the upper perforated plate 105 among Fig. 6 with housing 102, and wherein, the upper perforated plate 105 of flat tube plate structure is by being welded to connect housing 102, because the existence of high temperature difference causes the stress cracking state easily.
In addition, from the 108 easy condensations of quaternary gaseous mixture that enter of quaternary gaseous mixture inlet, thereby influence activity of such catalysts.
Fig. 8 A has shown the structure of the heat exchanger tube 103 among Fig. 6, as can be seen from the figure, fills solid pure red copper bar 110 in the heat exchanger tube 103, and its cross section is shown in Fig. 8 B, and this pure red copper bar 110 is fixed on copper rod and supports on 120.This structure makes pure red copper bar 110 can contact with heat-exchange tube 104 inwalls at no time, so that stream of gaseous formaldehyde is logical, therefore reduced heat exchanger effectiveness, and solid red copper bar has also increased cost.
In addition, be provided with quaternary gaseous mixture 108 parts such as grade that enter the mouth owing to generate the oxidizing chamber 112 of formaldehyde gas, make that catalyst layer 107 must be away from top cover, therefore, when catalyst changeout more, must earlier end socket be shed, the operator enters by ladder and carries out mating formation of catalyst in the oxidizing chamber then, causes more very inconvenience of catalyst changeout.
Summary of the invention
The purpose of this utility model provides a kind of tube sheet that can avoid the stationary heat exchangers of stress cracking state.
Another purpose of the present utility model provides a kind of tube sheet that can avoid the formaldehyde oxidation reactor of stress cracking state.
Another purpose of the present utility model provides a kind of tube sheet device that can avoid the formaldehyde oxidation reactor of stress cracking state.
According to an aspect of the present utility model, a kind of tube sheet of formaldehyde oxidation reactor is provided, be arranged on described formaldehyde oxidation reactor top, it is characterized in that: described tube sheet is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
Wherein, described upper end connects as one by the oxidator main cylinder inwall of welding with formaldehyde oxidation reactor.
Wherein, the lower end of described tube sheet connects the heat-exchange tube of formaldehyde oxidation reactor.
Because described tube sheet is the inferior flat tube sheet with radian, makes tube sheet have sufficient elongate space, has overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution.
According on the other hand of the present utility model, a kind of tube sheet of formaldehyde oxidation reactor is provided, comprise tube sheet that is arranged on described formaldehyde oxidation reactor top and the lower perforated plate that is arranged on described formaldehyde oxidation reactor bottom, it is characterized in that:
Described tube sheet is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
Wherein, the upper end of described tube sheet connects as one by the oxidator main cylinder inwall of welding with formaldehyde oxidation reactor.
Wherein, described lower perforated plate is flat tube sheet.
Wherein, the lower end of described tube sheet connects the upper end of the heat-exchange tube of formaldehyde oxidation reactor.
Wherein, described lower perforated plate connects the lower end of the heat-exchange tube of formaldehyde oxidation reactor.
Because tube sheet is the inferior flat tube sheet with radian, makes tube sheet have sufficient elongate space, has overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution.
Provide a kind of tube sheet that is applicable to stationary heat exchangers more on the one hand according to of the present utility model, it is characterized in that: described tube sheet is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
Wherein, the flat part in described Asia is recessed.
Because tube sheet is the inferior flat tube sheet with radian, makes tube sheet have sufficient elongate space, has overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution.
On the other hand.Be applicable to formaldehyde oxidation reactor of the present utility model, comprise:
Top cover;
The oxidator main cylinder that connects described top cover is provided with in it and is used for taking place the catalyst layer that oxidative dehydrogenation generates formaldehyde gas;
Connect described oxidator main cylinder to export the device of the formaldehyde gas that has generated;
It is characterized in that described top cover comprises:
Insulation jacket is made up of inner barrel that is tightly connected and shell body, forms heating interlayer between described shell body and inner barrel;
Enter the quaternary gaseous mixture inlet of top cover inside from shell body, the inner barrel of insulation jacket; And
Be used for the distribution that the quaternary gaseous mixture that enters from quaternary gaseous mixture inlet is evenly distributed on the described catalyst layer surface is bored, this distribution awl lower end is fixed on the inner barrel inwall.
Because the heating of above-mentioned insulation jacket has improved the temperature in the top cover, therefore can eliminate because of the condensation of quaternary gaseous mixture influence to catalyst.
The utility model is by on the insulation interlayer of described top cover the steam inlet being set and condensation-water drain is realized above-mentioned insulation jacket heating function, i.e. the described top cover of the Steam Heating of utilizing described steam inlet to provide.
In addition, described oxidator main cylinder also is provided with:
Be positioned at the steam (vapor) outlet of oxidator main cylinder upper end; And
Be positioned at the upper perforated plate under the described steam (vapor) outlet, described upper perforated plate upper end is fixed on the oxidator main cylinder.
Owing on the steam (vapor) outlet upper perforated plate, make that upper perforated plate can be under water fully, help overcoming cavitation erosion to upper perforated plate.
Described oxidator main cylinder also is provided with:
Heat-exchange tube, its upper end connects the lower end of described upper perforated plate; And
Be positioned under the described heat-exchange tube and fixedly connected with it lower perforated plate, its two ends are fixed on the oxidator main cylinder inwall.
Wherein, described top cover connects described oxidator main cylinder by flange.And described catalyst layer is positioned at the upper end of oxidator main cylinder.Like this, when catalyst changeout more,, lay down top cover as long as turn on the bolt of the flange that connects top cover and oxidator main cylinder, just can be easily catalyst changeout more.
Wherein, described oxidator main cylinder connects the skirt with the outlet of formaldehyde gas by flange seal.
Wherein, described oxidator main cylinder also is provided with:
Be positioned at the hot water inlet of oxidator main cylinder lower end, be used to supply with heat exchanger tube in the gas heat exchange of high temperature formaldehyde and produce the hot water of steam.
Wherein, below catalyst layer, be provided with the catalyst that links to each other with the oxidator main cylinder and support cylindrical shell;
Copper mesh directly is placed on the tube sheet, and
Described catalyst layer is laid on the described copper mesh.
Wherein, be filled with the efficient heat transfer part in the described heat-exchange tube, this efficient heat transfer part comprises:
Copper rod; And
Flat-shaped silk ribbon on described copper rod spirally is fastened.
Behind the described flat-shaped silk ribbon expanded by heating that is fastened on described copper rod, can contact with described heat-exchange tube inwall.
Because described flat-shaped silk ribbon is to be formed by the copper wire braiding, good permeability, even contact with heat-exchange tube, also can breathe freely, therefore can design and produce the flat-shaped silk ribbon that behind expanded by heating, can contact heat-exchange tube, thereby can fast reaction heat be passed to tube wall, improve heat transfer efficiency, promptly improve heat exchanger effectiveness.
Wherein, the stainless steel wire fix in position is passed through on the stainless steel wire on the upper perforated plate in the upper end of described copper rod, and this can improve gas speed, has shortened the time of staying of formaldehyde gas in the high-temperature region, thereby has reduced side reaction.
Wherein, the material of described copper rod and flat-shaped silk ribbon is a red copper.
In sum, with respect to prior art, the utlity model has following technique effect:
1, eliminated the influence of the condensation of quaternary gaseous mixture, improved the efficient that oxidative dehydrogenation generates formaldehyde gas takes place catalyst;
2, overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution;
3, make things convenient for the replacing of catalyst;
4, improve the heat transfer efficiency of heat-exchange tube, thereby improved the exchange efficiency of heat exchanger.
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is the schematic diagram of formaldehyde oxidation reactor of the present utility model;
Fig. 2 A has shown the connection state of the upper perforated plate 5 among Fig. 1 with oxidator main cylinder 2;
Fig. 2 B is the sectional view of the upper perforated plate 5 among Fig. 1;
Fig. 3 has shown the annexation of top cover 22 and oxidator main cylinder 2 among Fig. 1;
Fig. 4 has shown the structure of the heat exchanger tube 3 among Fig. 1;
Fig. 5 A is the profile of the top cover 22 among Fig. 1;
Fig. 5 B is the profile of the A-A direction of Fig. 5 A;
Fig. 6 is the schematic diagram of the formaldehyde oxidation reactor of prior art;
Fig. 7 shown the upper perforated plate among Fig. 6 structure and with the connection status of housing; And
Fig. 8 A has shown the structure of the heat exchanger tube among Fig. 6;
Fig. 8 B is the sectional view of the red copper bar among Fig. 8 A.
Description of reference numerals: 1-skirt; 2-oxidator main cylinder; The 3-heat exchanger tube; The 4-steam (vapor) outlet; The 5-upper perforated plate; The 6-catalyst supports cylindrical shell; The 7-catalyst layer; 8-quaternary gaseous mixture inlet; The 9-steam inlet; The 10-awl that distributes; The 11-inner barrel; The 12-insulation jacket; The 13-condensation-water drain; The 14-flange; The 15-copper mesh; The 16-hot water inlet; The 17-flange; The 18-lower perforated plate; The outlet of 19-formaldehyde gas; 20-flat-shaped silk ribbon; The 21-copper rod; The 22-top cover; The 23-outer cylinder body; The 24-stainless steel wire.
The specific embodiment
At first referring to Fig. 2 B, tube sheet of the present utility model is the parts of stationary heat exchangers, is a kind of inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia; Wherein, the downward nick of the flat part in described Asia.
The utility model can be the single tube sheet of formaldehyde oxidation reactor, shown in Fig. 2 A, for example this tube sheet can be arranged on the upper perforated plate 5 on formaldehyde oxidation reactor top, and its upper end connects as one by oxidator main cylinder 2 inwalls of welding with formaldehyde oxidation reactor.
The lower end of above-mentioned upper perforated plate 5 connects the heat-exchange tube 3 of formaldehyde oxidation reactor.
The utility model can also be the tube sheet device that comprises upper perforated plate 5 and lower perforated plate 18 of formaldehyde oxidation reactor, and wherein upper perforated plate 5 is arranged on the top of formaldehyde oxidation reactor, and lower perforated plate 18 is arranged on the bottom of formaldehyde oxidation reactor.In this case, described upper perforated plate 5 is the inferior flat tube sheets with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.Described lower perforated plate 18 is flat tube sheets.
As shown in Figure 1, the upper end of upper perforated plate 5 connects as one by oxidator main cylinder 2 inwalls of welding with formaldehyde oxidation reactor.The lower end of upper perforated plate 5 connects the upper end of the heat-exchange tube 3 of formaldehyde oxidation reactor.
Lower perforated plate 18 connects the lower end of the heat-exchange tube 3 of formaldehyde oxidation reactor.
Describe the situation that tube sheet of the present utility model is applied to formaldehyde oxidation reactor in detail below in conjunction with accompanying drawing.Be applicable to formaldehyde oxidation reactor of the present utility model, comprise:
The oxidator main cylinder 2 that connects described top cover 22 is provided with in it and is used for taking place the catalyst layer 7 that oxidative dehydrogenation generates formaldehyde gas;
Connect described oxidator main cylinder 2 to export the device of the formaldehyde gas that has generated, in this case, this device is the skirt 1 that is provided with formaldehyde gas outlet 19;
It is characterized in that described top cover 22 comprises:
Enter the quaternary gaseous mixture inlet 8 of top cover 22 inside from shell body 23, the inner barrel 23 of insulation jacket 12; And
Be used for be evenly distributed on described catalyst layer 7 lip-deep distribution awls 10 from the quaternary gaseous mixture inlet 8 quaternary gaseous mixtures that enter, these distribution awl 10 lower ends are fixed on inner barrel 11 inwalls.
Because the above-mentioned insulation jacket 12 of heating can improve the temperature in the top cover 22, thereby eliminated, can improve catalyst layer 7 thus the efficient that oxidative dehydrogenations generate the formaldehyde gas takes place because of the condensation of quaternary gaseous mixture influence to catalyst.
The utility model is by on the insulation interlayer 12 of described top cover 22 steam inlet 9 being set and condensation-water drain 13 is realized above-mentioned insulation jacket 12 heating functions, the described top cover 22 of Steam Heating that promptly utilizes described steam inlet 9 to provide.
In addition, described oxidator main cylinder 2 also is provided with:
Be positioned at the steam (vapor) outlet 4 of oxidator main cylinder 2 upper ends; And
Be positioned at the upper perforated plate 5 under the described steam (vapor) outlet 4, described upper perforated plate 5 upper ends are fixed on oxidator main cylinder 2 inwalls.
Because steam (vapor) outlet 4 is positioned on the upper perforated plate 5, makes that upper perforated plate can be under water fully, helps overcoming the corrosion of air to upper perforated plate.
Referring to Fig. 2 A and Fig. 2 B, described upper perforated plate 5 is the inferior flat tube sheets (promptly not being dull and stereotyped completely) with radian, and its two ends upwarp and form the upper end, and described upper end connects as one by welding and oxidator master tube 2 body inwalls.
Because upper perforated plate 5 is the inferior flat tube sheets with radian, make upper perforated plate 5 have sufficient elongate space, overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution.
Described oxidator main cylinder 2 also is provided with:
Vertically be arranged on a plurality of heat-exchange tubes 3 in the oxidator main cylinder 2, the upper end of each heat-exchange tube 3 connects the lower end of described upper perforated plate 5; And
Be positioned under the described heat-exchange tube 3 and fixedly connected with it lower perforated plate, its two ends are fixed on oxidator main cylinder 2 inwalls.
Wherein, described top cover 22 connects described oxidator main cylinder 2 by flange 14.And described catalyst layer 7 is positioned at the upper end of oxidator main cylinder 2.Like this, when catalyst changeout more,, lay down top cover 22 as long as turn on the bolt (not shown) of the flange 14 that connects top cover 22 and oxidator main cylinder 2, just can be easily catalyst changeout more.
Described oxidator main cylinder 2 is tightly connected by flange 17 and has the skirt 1 of formaldehyde gas outlet 19.
Described oxidator main cylinder 2 also is provided with:
Be positioned at the hot water inlet 16 of oxidator main cylinder 2 lower ends, be used to supply with heat exchanger tube 3 in the gas heat exchange of high temperature formaldehyde and produce the hot water of steam.
Wherein, below catalyst layer 7, be provided with the catalyst that links to each other with oxidator main cylinder 2 and support cylindrical shell 6;
In described catalyst supported cylindrical shell 6, copper mesh 15 was placed directly on the upper perforated plate 5, and
Described catalyst layer 7 is laid on the described copper mesh 15.
As shown in Figure 4,3 are filled with the efficient heat transfer part in the heat-exchange tube, and this efficient heat transfer part comprises:
Flat-shaped silk ribbon 20 on described copper rod 21 spirally is fastened.
Behind described flat-shaped silk ribbon 20 expanded by heating that are fastened on described copper rod 21, can contact with described heat-exchange tube 3 inwalls.
Because described flat-shaped silk ribbon 20 is to be formed by the copper wire braiding, good permeability, even contact with heat-exchange tube, also can breathe freely, therefore can design and produce the flat-shaped silk ribbon 20 that behind expanded by heating, can contact heat-exchange tube, thereby can fast reaction heat be passed to tube wall, improve heat transfer efficiency, promptly improve heat exchanger effectiveness.
Wherein, the upper end fix in position of described copper rod 21 is on the stainless steel wire 24 on the described upper perforated plate 5.This can improve gas speed, has shortened the time of staying of formaldehyde gas in the high-temperature region, thereby has reduced side reaction.Wherein, the material of described copper rod 21 and flat-shaped silk ribbon 20 is a red copper.
Below in conjunction with accompanying drawing the structure of the present utility model and the course of work are described in detail.
As shown in Figure 1, the quaternary gaseous mixture enters oxidator from quaternary gaseous mixture inlet 8, passes catalyst layer generation oxidative dehydrogenation and generates formaldehyde gas, and formaldehyde enters absorption system by formaldehyde gas outlet 19 after heat exchange.
The inner barrel 11 of oxidator top cover passes through vessel flange 14 sealing and fixing together with oxidator main cylinder 2, the quaternary gaseous mixture enters in the oxidator by the quaternary gaseous mixture inlet of opening in inner barrel 11 upper ends 8, the top cover 22 of oxidator is set up insulation jacket 12, steam 9 enters from the steam inlet, condensed water flows out from condensation-water drain 13, has eliminated because of the influence to catalyst of the condensate liquid of quaternary gaseous mixture.
The awl 10 that distributes is set in the oxidator top cover 11, and the lower end of the awl 10 that distributes is welded on the wall of top cover inner barrel 11, and under awl 10 effects that distribute, it is even that gas becomes.This is because quaternary gas is when entering the oxidator top cover, plays the effect of a redistribution through the throttling action of the awl 10 that distributes, and the awl 10 that distributes is concentric circles with inner barrel 11 again so can play and make air-flow steadily be evenly distributed on the effect of catalyst surface.Avoided because of of the influence of air-flow rotary impact, reduced because even incomplete pure content of reaction and the acidity height of causing of catalyst out-of-flatness surface or became uneven, influenced unit consumption and product quality is defective catalyst coating.
Oxidator main cylinder 2 upper ends are catalyst layer 7, and catalyst supports cylindrical shell 6 and links to each other with oxidator main cylinder 2, and copper mesh 15 is placed on catalyst and supports in the cylindrical shell 6, is covered with catalyst layer 7 on the copper mesh 15.
The upper perforated plate 5 of catalyst layer below is inferior flat tube plate structure, make tube sheet have sufficient elongate space, overcome the stress cracking phenomenon that high temperature difference causes well, solved the stress corrosion problem that long-term puzzled technical staff does not have the oxidator waste heat boiler section of solution, the upper end of upper perforated plate 5 is fixed by welding on the oxidator main cylinder 2, and the lower end of upper perforated plate 5 links to each other with the upper end of heat exchanger tube 3 by welding.
Be filled with red copper efficient heat transfer part in the heat exchanger tube 3, the efficient heat transfer part is the flat-shaped silk of being made by pure red copper material, be wrapped on the red copper bar and make, red copper efficient heat transfer part is fixed on the tube sheet 5 by the stainless steel iron wire, has improved gas speed, has shortened the time of staying of formaldehyde gas in the high-temperature region, thereby reduced side reaction, contact with the heat exchange tube wall behind the efficient heat transfer part expanded by heating, fast reaction heat is passed to tube wall, improved heat transfer efficiency.
The lower end of heat exchanger tube 3 links to each other with lower perforated plate 18 by welding manner, the two ends of lower perforated plate 18 link to each other with oxidator main cylinder 2 by welding manner, be provided with hot water inlet 16 in the lower end of oxidator main cylinder 2, hot water enters in the oxidator main cylinder 2 from hot water inlet 16, with high temperature formaldehyde gas heat exchange in the heat exchanger tube 3 and produce steam, steam enters the steam net from steam (vapor) outlet 4.
Steam (vapor) outlet 4 is positioned at the upper end of oxidator main cylinder 2, and the position can make upper perforated plate 5 under water fully than upper perforated plate 5 height like this, helps overcoming cavitation erosion.
The catalytic oxidative dehydrogenations reaction takes place by catalyst layer 7 and generates the formaldehyde gas in the quaternary gaseous mixture, formaldehyde gas through with the hot water heat exchange after enter absorption system by formaldehyde gas outlet 19, oxidator main cylinder 2 passes through vessel flange 17 sealing and fixing together with skirt 1.
Fig. 2 A and Fig. 2 B shown upper perforated plate 5 inferior flat tube plate structure and with the connection state of oxidator main cylinder 2.The making of inferior flat pipe is by flat tube sheet being carried out the spinning operation, make it that certain plastic deformation take place, forming the tube sheet with certain radian; Upper perforated plate 5 links into an integrated entity by the mode of welding with the inwall of oxidator main cylinder 2.
The connection state of top cover 22 and oxidator main cylinder 2 as shown in Figure 3.Oxidation reactor top cover 22 passes through flange 14 sealing and fixing together with oxidator main cylinder 2, and oxidator main cylinder 2 is 1400mm with the diameter of top cover 22, and upper perforated plate 5 is 650mm to the distance of case top.When catalyst changeout more, only need the oxidator top cover is laid down, the operator stands in the housing catalyst of just mating formation easily outward, operates and need not enter in the housing.
The structure of efficient heat transfer part and with being connected as shown in Figure 4 of other parts, wherein the efficient heat transfer part is to be wrapped on the red copper bar 21 by the flat-shaped silk 20 that pure red copper material is made to make, the loop configuration fix in position in stainless steel wire upper perforated plate 5 on 24 on (this stainless steel wire 24 by upper perforated plate 5 supported) of red copper efficient heat transfer part by tying up to red copper bar 21 tops, improved gas speed, shortened the time of staying of formaldehyde gas in the high-temperature region, thereby reduced side reaction, contact with the heat exchange tube wall behind the efficient heat transfer part expanded by heating, fast reaction heat is passed to tube wall, improved heat transfer efficiency.
The structure of oxidator top cover 22 as shown in Figure 5, wherein said top cover 22 comprises: by the insulation jacket 12 that inner barrel 11 that is tightly connected and shell body 23 are formed, this insulation jacket 12 forms heating interlayer between described shell body 23 and inner barrel 23; Enter the quaternary gaseous mixture inlet 8 of top cover 22 inside from shell body 23, the inner barrel 23 of insulation jacket 12; And be used for be evenly distributed on described catalyst layer 7 lip-deep distribution awls 10 from the quaternary gaseous mixture inlet 8 quaternary gaseous mixtures that enter, this distribution awl 10 is a hollow, its lower end is fixed on inner barrel 11 inwalls.
The structure of this top cover 22 can be eliminated because of the condensation of the quaternary gaseous mixture influence to catalyst.Because quaternary gas makes the mist temperature reach 100 ℃, 64.2 ℃ of the boiling points of methyl alcohol through preheater; The driving initial stage (igniting before) for fear of the condensation of methanol gas cause the out-of-flatness of catalyst surface and condensation methyl alcohol to cause incomplete combustion and in the catalyst carbon distribution influence conversion ratio, make the top cover of quaternary gas, thereby avoided causing the reason of these unfavorable factors by heating.
Can find that from the above description the utility model can reach following technique effect:
1, eliminated the condensation of quaternary gaseous mixture to the impact of catalyst, improved the generation oxidative dehydrogenation and generated first The efficient of aldehyde gas;
2, overcome well the stress cracking phenomenon that high temperature difference causes, solved long-term puzzled technical staff and do not separated The stress corrosion problem of the oxidator waste heat boiler section of determining;
3, make things convenient for the replacing of catalyst;
4, improve the heat transfer efficiency of heat-exchange tube, thereby improved the exchange efficiency of heat exchanger.
The purpose of above-mentioned explanation only is used for explanation the utility model, and is used for limiting scope of the present utility model. This The scope of utility model is defined by claims.
Claims (10)
1, a kind of tube sheet of formaldehyde oxidation reactor is arranged on described formaldehyde oxidation reactor top, it is characterized in that: described tube sheet (5) is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
2, the tube sheet of formaldehyde oxidation reactor according to claim 1 is characterized in that, described upper end connects as one by oxidator main cylinder (2) inwall of welding with formaldehyde oxidation reactor.
3, the tube sheet of formaldehyde oxidation reactor according to claim 1 and 2 is characterized in that, the lower end of described tube sheet connects the heat-exchange tube (3) of formaldehyde oxidation reactor.
4, a kind of tube sheet device of formaldehyde oxidation reactor comprises tube sheet (5) that is arranged on described formaldehyde oxidation reactor top and the lower perforated plate (18) that is arranged on described formaldehyde oxidation reactor bottom, it is characterized in that:
Described tube sheet (5) is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
5, the tube sheet device of formaldehyde oxidation reactor according to claim 4 is characterized in that, the upper end of described tube sheet (5) connects as one by oxidator main cylinder (2) inwall of welding with formaldehyde oxidation reactor.
6, the tube sheet device of formaldehyde oxidation reactor according to claim 4 is characterized in that, described lower perforated plate (18) is flat tube sheet.
7, the tube sheet device of formaldehyde oxidation reactor according to claim 6 is characterized in that, the lower end of described tube sheet (5) connects the upper end of the heat-exchange tube (3) of formaldehyde oxidation reactor.
8, the tube sheet device of formaldehyde oxidation reactor according to claim 7 is characterized in that, described lower perforated plate (18) connects the lower end of the heat-exchange tube (3) of formaldehyde oxidation reactor.
9, a kind of tube sheet that is applicable to stationary heat exchangers is characterized in that:
Described tube sheet (5) is the inferior flat tube sheet with radian, comprises that two ends upwarp the upper end of formation and put down lower end partly as the Asia.
10, tube sheet according to claim 9 is characterized in that, the flat part in described Asia is recessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720103460 CN200947003Y (en) | 2007-02-05 | 2007-02-05 | Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720103460 CN200947003Y (en) | 2007-02-05 | 2007-02-05 | Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200947003Y true CN200947003Y (en) | 2007-09-12 |
Family
ID=38734067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720103460 Expired - Fee Related CN200947003Y (en) | 2007-02-05 | 2007-02-05 | Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200947003Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267076A (en) * | 2021-06-04 | 2021-08-17 | 四川能投建工集团设计研究院有限公司 | Hydrocyanic acid oxidation reactor and tube plate cooling structure thereof |
-
2007
- 2007-02-05 CN CN 200720103460 patent/CN200947003Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267076A (en) * | 2021-06-04 | 2021-08-17 | 四川能投建工集团设计研究院有限公司 | Hydrocyanic acid oxidation reactor and tube plate cooling structure thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1281304C (en) | Reactor for exothermic or endothermic heterogeneous reactions | |
| CN1234450C (en) | Isothermal reactor for exothermic or endothermic heterogeneous reactions | |
| CN1198758C (en) | Method for prodncing carbon monoxide by reverse conversion with adapted catalyst | |
| CN1914118A (en) | Modifier | |
| CN200950011Y (en) | Heat exchanger, heat exchanger of formaldehyde oxidation reactor | |
| CN1222352C (en) | Heterogeneous reactor for heat absorption or release | |
| CN101239893B (en) | Formaldehyde oxidation reactor | |
| CN200947003Y (en) | Tubesheet for fixing heat exchanger, tubesheet of methanal oxidation reactor and tubesheet device | |
| CN104826557A (en) | Synthesis reactor using self reaction heat to heat feed medium | |
| CN200998659Y (en) | Formaldehyde oxidation reactor | |
| CN205216808U (en) | Formaldehyde oxidation reaction unit | |
| CN200998660Y (en) | Formaldehyde oxidation reactor | |
| CN102861538A (en) | Tube type fixed bed reactor | |
| CN202339132U (en) | High-temperature-resistant tube-arrayed type graphite heat exchanger | |
| CN111040794B (en) | System and process for producing oil by continuous and efficient pyrolysis of waste plastics | |
| KR20120134266A (en) | Apparatus for manufacturing bio-oil | |
| CN101239894B (en) | Formaldehyde oxidation reactor | |
| CN208229872U (en) | Asymmetric tube-sheet type beam tube reactor | |
| WO2021035768A1 (en) | Phosgene synthesis and brine evaporation electrolysis integrated treatment process | |
| CN101949655B (en) | Precondenser | |
| CN206130944U (en) | High -efficient waste heat boiler | |
| CN219433315U (en) | Boiler tail gas recovery device | |
| CN219886017U (en) | Energy-saving production device for preparing biodiesel | |
| CN203379866U (en) | High-temperature reactor and chemical engineering system using high-temperature reactor | |
| KR101632576B1 (en) | A combustion typed hydrogen generating apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YONGGONG WEIFANG (BEIJING) TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: YONGGANG WEIFANG SCIENCE-TECHNOLOGY CO., LTD., BEIJING |
|
| CP03 | Change of name, title or address |
Address after: Beijing City, Haidian District Haidian street, No. 38 branch bank building 716, zip code: 100080 Patentee after: Everfirst Wisefund (Beijing) Technology Co., Ltd. Address before: Beijing City, Haidian District Haidian street, No. 38 branch bank building 716, zip code: 100080 Patentee before: Everfirst Wisefund Technology (Beijing) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070912 Termination date: 20130205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |