CN105032304A - Methanol tower reboiler with fluid uniformly distributing function - Google Patents

Abstract

The invention relates to a methanol tower reboiler with a fluid uniformly distributing function, for overcoming the conditions that in the prior art, fluid distribution inside and outside of a heating pipe is not uniform, and that a fluid flowing by a baffle plate is in a cross-flow state, so that the pressure loss is great, and vibration exists during the operation process. The methanol tower reboiler is characterized in that multiple stages of connected distributors are welded on the inner wall of a tube of an upper channel, ultra-thin deflecting fences and a steam distributing barrel with rectangular holes are welded on the inner wall of a shell side pipe bundle barrel, positioning rods are intersected horizontally and vertically and are welded to ultrathin support rings, so as to form rectangular spaces for positioning the heating pipe, each rectangular space of the ultra-thin deflecting fences and the heating pipe passing through the rectangular spaces form bevel edge concave arc triangular current flow gaps, the contact gaps between the rectangular spaces of the ultra-thin deflecting fences and the heating pipe are very small. The methanol tower reboiler has the beneficial effects that through the arrangement of the multiple stages of connected distributors, the flow state of the fluid inside the heating pipe is improved, and the purpose that the liquid is uniformly distributed in the heating pipe is achieved.

Description

There is the methanol column reboiler of fluid well-distributing distributed function

Technical field

The invention belongs to methanol column reboiler equipment technical field, particularly adopt the methanol column reboiler with fluid well-distributing distributed function that Epoxidation of Propylene with Hydrogen Peroxide in Methanol uses.

Background technology

Expoxy propane, has another name called propylene oxide, methyl oxirane, be colourless ether taste liquid, low boiling, inflammable, be a kind of important Organic Chemicals, being large Organic chemical products important during petrochemical industry is produced, is also one of most important intermediate products of fine chemistry industry, mainly for the production of pPG, propane diols and all kinds of non-ionic surface active agentdeng, wherein PPG produces polyurethane foam, insulation material, elastomer, adhesive and coatingdeng important source material, all kinds of nonionic surface active agentoil, chemical industry, agricultural chemicals, weaving, the industry such as daily use chemicals be used widely.Expoxy propane or important acryloyl derivative, the propylene of about 7% is used for production of propylene oxide every year.

The production technology of expoxy propane mainly contains chlorohydrination method, conjugated oxidation (also claiming indirect oxidation method) and direct oxidation method.Nowadays the major industrialized method of world production expoxy propane is chlorohydrination method, the shortcoming of the method is that water resources consumption is large, and a large amount of waste water and waste residue can be produced need discharge, often produce 1 ton of expoxy propane and produce the saponification waste-water of 40 ~ 50 tons of chlorides and the waste residue of more than 2 tons, this waste water has " five is high " feature that temperature is high, pH value is high, chloride content is high, COD content is high and suspension content is high, be difficult to process, environmental pollution is serious; Meanwhile, chlorohydrination also consumes chlorine and the lime raw material of a large amount of high energy consumption, and chlorine and calcium emit in waste water and waste residue, and the hypochlorous acid produced in production process is also more serious to the corrosion of equipment.In order to overcome, technological process existing for above-mentioned technique is complicated, energy consumption is large, product yield is low and with serious pollution problem, recent years, and hydrogen peroxide direct oxidation method has been succeeded in developing and successively realized suitability for industrialized production.Peroxidating method (HPPO method) is by the new work of hydrogen peroxide (hydrogen peroxide) catalysis epoxidation propylene expoxy propane

Skill, only generates expoxy propane and water in production process, and technological process is simple, less energy consumption, product yield are high, does not have other byproducts, pollutes few, belongs to eco-friendly clean-production system, good development prospect.

Producing expoxy propane prior art at hydrogen peroxide method has gone into operation in the device of operation, it is 100,000 tons/year that hydrogen peroxide method produces expoxy propane maximum processing capability, because barrel diameter is less, after the direct access arrangement of fluid, can be uniformly distributed, manufacturing technique requirent can be reached, but disposal ability is lower.

Maximum processing capability is the methanol column reboiler of the hydrogen peroxide method production expoxy propane of 300,000 tons/year, it is the process units that hydrogen peroxide method maximum in the world at present produces expoxy propane, due to the raising of device disposal ability, make equipment achieve maximization, Problems existing is thereupon, because barrel diameter increases, heating tube increasing number, the direct access arrangement of fluid, causes in heating tube pipe and heating tube extratubal fluid situation pockety, can not meet the requirement of fluid well-distributing distribution, in addition, what existing equipment adopted is common thickness is the baffle arrangement that 20mm is thicker, namely on the deflection plate made of steel plate, process the through hole that several heating tubes pass through, gap between heating tube and baffle hole is very little, therefore heating tube extratubal fluid is only had and is flowed by multilayer deflection plate, flow regime when making fluid flow through deflection plate is cross-flow state, cause the pressure loss larger, and in equipment running process, there is the problem of vibration, after equipment enlarging, in running, the vibration problem of equipment is more serious, the pressure loss is also difficult to control in process system claimed range simultaneously.

Summary of the invention

The present invention will deal with problems, overcome the deficiencies in the prior art part, be uniformly distributed with heating tube extratubal fluid for the service requirement that still can meet process system after solution equipment enlarging provides in a kind of heating tube pipe and in running, reduce the methanol column reboiler with fluid well-distributing distributed function vibrating, reduce the pressure loss.

The technical solution used in the present invention comprises upper tube box, shell side tube bank, lower tube box, heating tube and steam inlet pipe, at upper tube box cylinder inboard wall welding multistage connection formula distributor; The distribution of steam cylinder of ultrathin deflecting fence and band rectangular opening is welded at the inwall of shell side tube bank cylindrical shell.

Described multistage connection formula distributor comprises plug-in type one-level distributor, carry potential overflow groove multichannel secondary splitter, band gas-liquid equilibrium pipe screen type three grades of distributors and V-type slot type cloth film head.

Described plug-in type one-level distributor comprises cylindrical shape supervisor, and before and after cylindrical shape supervisor, both sides are respectively welded with row's cylindrical shape arm, and below cylindrical shape arm, have welding drum shape downspout, cylindrical downcomer is inserted in carry potential overflow groove multichannel secondary splitter.

Described carry potential overflow groove multichannel secondary splitter comprises rectangle overflow launder, gripper shoe and hydrops groove, described gripper shoe is positioned at bottom, is processed with rectangular opening above, weld rectangle overflow launder in this rectangular opening, between every 2 rectangle overflow launders, form hydrops groove with gripper shoe.

Described band gas-liquid equilibrium pipe screen type three grades of distributors comprise gas-liquid equilibrium pipe, band zigzag downflow weir and have the sieve plate of sieve aperture, described sieve plate is positioned at bottom, sieve plate is processed with through hole and welds gas-liquid equilibrium pipe in this through hole, sieve plate excircle welds zigzag downflow weir.

Described V-type slot type cloth film head epimere is tubular film head, and hypomere is conical film head, and tubular film women's head-ornaments symmetry has 2 v-notch.

Described ultrathin deflecting fence is made up of ultra-thin bracing ring and backstay, the thin band steel that ultra-thin bracing ring is 4mm by thickness is simmered into ring shape, backstay is made up of the round steel of φ 6mm and is given ultra-thin bracing ring welded together in length and breadth mutually, formed one by one to the coffin that heating tube plays the role of positioning, each coffin of ultrathin deflecting fence and by defining 4 hypotenuse concave arc triangle following current gaps be made up of 2 right-angle sides and 1 concave arc limit between heating tube wherein, fluid outside heating tube is from top to bottom flowed by this hypotenuse concave arc triangle following current gap, form following current, contact gap between the coffin of described ultrathin deflecting fence and heating tube is very little.

The barrel of the distribution of steam cylinder of described band rectangular opening is processed with upper and lower 2 row's rectangular openings, described rectangular opening is evenly distributed along barrel circumference, the width of rectangular opening is identical, highly be positioned at barrel centre position the highest, and successively decrease gradually both sides to the left and right with barrel centre position, during installation, height becomes large gradually along with away from steam inlet pipe, the highest at the height of the rectangular opening on the opposite away from steam inlet pipe.

Contact gap between the coffin of described ultrathin deflecting fence and heating tube is maximum only has 0.5mm.

Compared with prior art, the invention has the beneficial effects as follows:

(1) because upper tube box of the present invention is built with multistage connection formula distributor, include the multistage connection formula distributor of plug-in type one-level distributor, carry potential overflow groove multichannel secondary splitter, band gas-liquid equilibrium pipe screen type three grades of distributors and V-type slot type cloth film head, after solving equipment enlarging, liquid is an equally distributed difficult problem in heating tube, by the setting of multistage distributor, improve the flow regime of fluid in heating tube, reach liquid equally distributed object in heating tube;

(2) because the present invention is at the side welding steam inlet pipe of shell side tube bank cylindrical shell, at the distribution of steam cylinder of the inwall welded bands rectangular opening of shell side tube bank cylindrical shell, water vapour enters from steam inlet pipe, and the distribution of steam cylinder of band rectangular opening is uniformly distributed, and according to flow behavior and the hydrodynamics method of fluid, the width determining rectangular opening is identical, highly be positioned at barrel centre position the highest, and successively decrease gradually both sides to the left and right with barrel centre position, during installation, height becomes large gradually along with away from steam inlet pipe side, the highest at the height of the rectangular opening on the opposite away from steam inlet pipe side, steam is made to be distributed in the gap of heating tube uniformly,

(3) because heating tube of the present invention adopts ultrathin deflecting fence to position, described ultrathin deflecting fence is made up of ultra-thin bracing ring and backstay, ultra-thin bracing ring is simmered into ring shape by the thin band steel that 4mm is thick, backstay is made up of the round steel of φ 6mm and is given ultra-thin bracing ring welded together in length and breadth mutually, forms rectangle one by one

Space, play the effect of location heating tube, each coffin of ultrathin deflecting fence and by defining 4 hypotenuse concave arc triangle following current gaps be made up of 2 right-angle sides and 1 concave arc limit between heating tube wherein, fluid outside heating tube is from top to bottom flowed by this hypotenuse concave arc triangle following current gap, form following current, contact gap between the coffin of described ultrathin deflecting fence and heating tube is very little, maximum only have 0.5mm, make the displacement of heating tube in ultrathin deflecting fence very little, thus decrease the resistance of fluid flowing, effectively prevent the vibration of heating tube, reach tube bank in equipment running process and reduce vibration, reduce the effect of pressure loss.

accompanying drawing illustrates:

Fig. 1 is structural representation of the present invention;

The A portion enlarged drawing of Fig. 2 Fig. 1;

Fig. 3 is the structural representation of rectangular opening distribution of steam band of the present invention;

Fig. 4 is the C-C sectional view of Fig. 3;

Fig. 5 is the ultra-thin deflecting fence structural representation of the present invention;

Fig. 6 is that the ultra-thin deflecting fence of the present invention and heating tube assemble enlarged diagram;

Fig. 7 is plug-in type one-level dispensing arrangement schematic diagram of the present invention;

Fig. 8 is carry potential overflow groove multichannel secondary splitter structural representation of the present invention;

Fig. 9 is band gas-liquid equilibrium pipe screen type of the present invention three grades of dispensing arrangement schematic diagrames;

Figure 10 is the D-D sectional view of Fig. 9;

Figure 11 is the E portion enlarged drawing of Fig. 2.

In figure:

1. upper tube box,

1-1. upper tube box vessel flange,

1-2. multistage connection formula distributor,

1-2-1. plug-in type one-level distributor,

1-2-1-1. cylindrical shape is responsible for, 1-2-1-2. cylindrical shape arm, 1-2-1-3. cylindrical downcomer,

1-2-2. carry potential overflow groove multichannel secondary splitter,

1-2-2-1. rectangle overflow launder, 1-2-2-2. gripper shoe, 1-2-2-3. hydrops groove,

1-2-3. is with gas-liquid equilibrium pipe screen type three grades of distributors,

1-2-3-1. gas-liquid equilibrium pipe, 1-2-3-2. sieve plate,

1-2-3-3. zigzag downflow weir, 1-2-3-4. sieve aperture,

1-2-4.V type slot type cloth film head,

1-2-4-1. tubular film head, the conical film head of 1-2-4-2., 1-2-4-3.V type breach,

1-3. upper tube box cylindrical shell,

1-4. gaseous phase outlet,

1-5. upper cover,

1-6. liquid-inlet,

2. shell side tube bank,

2-1. lower perforated plate,

The ultrathin deflecting fence of 2-2.,

The ultra-thin bracing ring of 2-2-1., 2-2-2. backstay,

2-3. heating tube,

2-4. is with the distribution of steam cylinder of rectangular opening,

2-4-1. barrel, 2-4-2. rectangular opening,

2-5. upper perforated plate,

2-6. steam inlet pipe,

2-7. shell side tube bank cylindrical shell,

2-8. condensate outlet pipe,

3. lower tube box,

3-1. drain pipe, 3-2. low head, 3-3. lower tube box vessel flange,

A. hypotenuse concave arc triangle following current gap,

B. contact gap.

Detailed description of the invention

As shown in Figure 1, the present invention includes upper tube box 1, shell side tube bank 2 and lower tube box 3,

Described upper tube box 1 comprises upper tube box vessel flange 1-1, multistage connection formula distributor 1-2, upper tube box cylindrical shell 1-3, gaseous phase outlet 1-4, upper cover 1-5 and liquid-inlet 1-6, wherein, upper tube box cylindrical shell 1-3 is cylindrical drum, at the lower surface of upper tube box cylindrical shell 1-3 welding upper tube box vessel flange 1-1, at the upper surface of upper tube box cylindrical shell 1-3 welding upper cover 1-5, at the welded top gaseous phase outlet 1-4 of upper cover 1-5, at the side of upper tube box cylindrical shell 1-3 welding liquid-inlet 1-6, at cylindrical shell 1-3 inwall welding multistage connection formula distributor 1-2;

Described shell side tube bank 2 comprises lower perforated plate 2-1, ultrathin deflecting fence 2-2, heating tube 2-3, distribution of steam cylinder 2-4, the upper perforated plate 2-5 of band rectangular opening, steam inlet pipe 2-6, shell side tube bank cylindrical shell 2-7 and condensate outlet pipe 2-8, wherein, shell side tube bank cylindrical shell 2-7 is cylindrical drum, at the lower surface welding lower perforated plate 2-1 of shell side tube bank cylindrical shell 2-7, at the upper surface welding upper perforated plate 2-5 of shell side tube bank cylindrical shell 2-7, at shell

The side welding steam inlet pipe 2-6 and condensate outlet pipe 2-8 of journey tube bank cylindrical shell 2-7, the distribution of steam cylinder 2-4 of ultrathin deflecting fence 2-2 and band rectangular opening is welded at the inwall of shell side tube bank cylindrical shell 2-7, lower perforated plate 2-1 and upper perforated plate 2-5 are processed with heating tube pore, in heating tube pore, insert heating tube 2-3, and heating tube 2-3 and lower perforated plate 2-1 and upper perforated plate 2-5 is welded together;

Described lower tube box 3 comprises drain pipe 3-1, low head 3-2 and lower tube box vessel flange 3-3, and wherein, low head 3-2 is ellipsoidal head, at low head 3-2 upper surface welding lower tube box vessel flange 3-3, at low head 3-2 lower surface center weld drain pipe 3-1;

As shown in Figure 2, described multistage connection formula distributor 1-2 comprises plug-in type one-level distributor 1-2-1, carry potential overflow groove multichannel secondary splitter 1-2-2, band gas-liquid equilibrium pipe screen type three grades of distributor 1-2-3 and V-type slot type cloth film head 1-2-4, wherein:

Described plug-in type one-level distributor 1-2-1 as shown in Figure 2 and Figure 7, plug-in type one-level distributor 1-2-1 comprises cylindrical shape supervisor 1-2-1-1, before and after cylindrical shape supervisor 1-2-1-1, both sides are respectively welded with row's cylindrical shape arm 1-2-1-2, below cylindrical shape arm 1-2-1-2, be welded with cylindrical downcomer 1-2-1-3, cylindrical downcomer 1-2-1-3 is inserted in carry potential overflow groove multichannel secondary splitter 1-2-2;

Described carry potential overflow groove multichannel secondary splitter 1-2-2 as shown in Figure 2 and Figure 8, carry potential overflow groove multichannel secondary splitter 1-2-2 comprises rectangle overflow launder 1-2-2-1 and gripper shoe 1-2-2-2, gripper shoe 1-2-2-2 is positioned at bottom, be processed with rectangular opening above, rectangle overflow launder 1-2-2-1 is welded in this rectangular opening, hydrops groove 1-2-2-3 is formed with gripper shoe 1-2-2-2 between every 2 rectangle overflow launder 1-2-2-1, for receiving the liquid that cylindrical downcomer 1-2-1-3 gets off, after liquid rises to the overflow launder 1-2-2-1 upper surface of rectangle, being flowed downward by overflow launder 1-2-2-1 enters in band gas-liquid equilibrium pipe screen type three grades of distributor 1-2-3,

Three grades of distributor 1-2-3 are as shown in Fig. 2, Fig. 9 and Figure 10 for described band gas-liquid equilibrium pipe screen type, band

Gas-liquid equilibrium pipe screen type three grades of distributor 1-2-3 comprise gas-liquid equilibrium pipe 1-2-3-1, band zigzag downflow weir 1-2-3-3 and have the sieve plate 1-2-3-2 of sieve aperture 1-2-3-4, sieve plate 1-2-3-2 is positioned at bottom, sieve plate 1-2-3-2 is processed with through hole and in this through hole, welds gas-liquid equilibrium pipe 1-2-3-1, sieve plate 1-2-3-2 excircle welds zigzag downflow weir 1-2-3-3, the liquid that zigzag downflow weir 1-2-3-3 flows downward for receiving overflow launder 1-2-2-1, sieve aperture 1-2-3-4 is for the emptying liquid that stops; The gas that gas-liquid equilibrium pipe 1-2-3-1 is used for heating tube 2-3 to manage interior gasification generation is upwards discharged;

Described V-type slot type cloth film head 1-2-4 as shown in figs. 2 and 11, V-type slot type cloth film head 1-2-4 epimere is tubular film head 1-2-4-1, hypomere is conical film head 1-2-4-2, above tubular film head 1-2-4-1, symmetry has 2 v-notch 1-2-4-3, this v-notch 1-2-4-3 is for the liquid that receives zigzag downflow weir 1-2-3-3 and get off and enter in heating tube 2-3 pipe, hypomere conical film head 1-2-4-2 is used for being inserted in heating tube 2-3, realizes the connection with heating tube 2-3;

As shown in Figure 1, Figure 3 and Figure 4, the barrel 2-4-1 of the distribution of steam cylinder 2-4 of described band rectangular opening is processed with two rows rectangular opening 2-4-2, in order to ensure that distribution of steam is even, rectangular opening 2-4-2 is evenly distributed along barrel 2-4-1 circumference, the width of rectangular opening 2-4-2 is identical, highly be positioned at barrel 2-4-1 centre position the highest, and successively decrease gradually both sides to the left and right with barrel 2-4-1 centre position, during installation, height is along with large away from the change gradually of steam inlet pipe 2-6 side, the highest at the height of the rectangular opening 2-4-2 on the opposite away from steam inlet pipe 2-6 side;

As shown in Figure 5 and Figure 6, described ultrathin deflecting fence 2-2 is made up of ultra-thin bracing ring 2-2-1 and backstay 2-2-2, the thin band steel that ultra-thin bracing ring 2-2-1 is 4mm by thickness is simmered into ring shape, because ultra-thin bracing ring 2-2-1 wall thickness is very thin, when shell side steam flows through ultra-thin bracing ring 2-2-1, very large resistance can not be brought to fluid, reduce the Pressure Drop of fluid in shell fluid flow process, backstay 2-2-2 is made up of the round steel of φ 6mm and gives ultra-thin bracing ring 2-2-1 welded together in length and breadth mutually in addition, forms rectangle one by one

Space, play the effect of location heating tube 2-3, each coffin of ultrathin deflecting fence 2-2 and by defining 4 hypotenuse concave arc triangle following current gap a be made up of 2 right-angle sides and 1 concave arc limit between heating tube 2-3 wherein, fluid outside heating tube 2-3 is from top to bottom flowed by this hypotenuse concave arc triangle following current gap a, form following current, decrease resistance, reduce vibration, in addition, in addition, contact gap b between the coffin of ultrathin deflecting fence 2-2 and heating tube 2-3 is very little, maximum only have 0.5mm, the displacement of such heating tube 2-3 in the coffin of ultrathin deflecting fence 2-2 is very little, thus effectively prevent the vibration of heating tube 2-3.

The course of work of the present invention is: methanol column phegma enters methanol column reboiler upper tube box 1 via liquid-inlet 1-6, phegma enters heating tube 2-3 after multistage connection formula distributor 1-2 is uniformly distributed, the heating entering the water vapour of shell side from steam inlet pipe 2-6 is received in heating tube 2-3, again ebullition, gasification, methanol gas after gasification rises along in heating tube 2-3, by the gas-liquid equilibrium pipe 1-2-3-1 of band gas-liquid equilibrium pipe screen type three grades of distributor 1-2-3, discharge from the gaseous phase outlet 1-4 end socket 1-5, vaporized water is not had to flow downward along in heating tube 2-3 in phegma, discharged by the drain pipe 3-1 of lower tube box 3, water vapour enters from steam inlet pipe 2-6, and the distribution of steam cylinder 2-4 of band rectangular opening is uniformly distributed, each coffin of ultrathin deflecting fence 2-2 and 4 hypotenuse concave arc triangle following current gap a be made up of 2 right-angle sides and 1 concave arc limit by being formed between heating tube 2-3 are wherein flowed through in shell side tube bank 2, methanol column phegma in heating tube 2-3 pipe is heated, becomes condensed water after the water vapour condensation outside heating tube 2-3 pipe and discharged by condensate outlet pipe 2-8.

Claims (9)

1. there is the methanol column reboiler of fluid well-distributing distributed function, comprise upper tube box (1), shell side tube bank (2), lower tube box (3), heating tube (2-3) and steam inlet pipe (2-6), it is characterized in that, at upper tube box cylindrical shell (1-3) inwall welding multistage connection formula distributor (1-2); The distribution of steam cylinder (2-4) of ultrathin deflecting fence (2-2) and band rectangular opening is welded at the inwall of shell side tube bank cylindrical shell (2-7).

2. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 1, it is characterized in that, described multistage connection formula distributor (1-2) comprises plug-in type one-level distributor (1-2-1), carry potential overflow groove multichannel secondary splitter (1-2-2), band gas-liquid equilibrium pipe screen type three grades of distributors (1-2-3) and V-type slot type cloth film head (1-2-4).

3. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 2, it is characterized in that, described plug-in type one-level distributor (1-2-1) comprises cylindrical shape supervisor (1-2-1-1), before and after cylindrical shape supervisor, both sides are respectively welded with row's cylindrical shape arm (1-2-1-2), below cylindrical shape arm (1-2-1-2), have welding drum shape downspout (1-2-1-3), cylindrical downcomer (1-2-1-3) is inserted in carry potential overflow groove multichannel secondary splitter (1-2-2).

4. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 2, it is characterized in that, described carry potential overflow groove multichannel secondary splitter (1-2-2) comprises rectangle overflow launder (1-2-2-1), gripper shoe (1-2-2-2) and hydrops groove (1-2-2-3), described gripper shoe (1-2-2-2) is positioned at bottom, be processed with rectangular opening above, weld rectangle overflow launder (1-2-2-1) in this rectangular opening, between every 2 rectangle overflow launders (1-2-2-1), form hydrops groove (1-2-2-3) with gripper shoe (1-2-2-2).

5. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 2, it is characterized in that, described band gas-liquid equilibrium pipe screen type three grades of distributors (1-2-3) comprise gas-liquid equilibrium pipe (1-2-3-1), band zigzag downflow weir (1-2-3-3) and have the sieve plate (1-2-3-2) of sieve aperture (1-2-3-4), described sieve plate (1-2-3-2) is positioned at bottom, sieve plate (1-2-3-2) is processed with through hole and in this through hole, welds gas-liquid equilibrium pipe (1-2-3-1), sieve plate (1-2-3-2) excircle welds zigzag downflow weir (1-2-3-3).

6. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 2, it is characterized in that, described V-type slot type cloth film head (1-2-4) epimere is tubular film head (1-2-4-1), hypomere is conical film head (1-2-4-2), and tubular film head (1-2-4-1) above symmetry has 2 v-notch (1-2-4-3).

7. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 1, it is characterized in that, described ultrathin deflecting fence (2-2) is made up of ultra-thin bracing ring (2-2-1) and backstay (2-2-2), the thin band steel that ultra-thin bracing ring (2-2-1) is 4mm by thickness is simmered into ring shape, backstay (2-2-2) is made up of the round steel of φ 6mm and is given ultra-thin bracing ring (2-2-1) welded together in length and breadth mutually, formed one by one to the coffin that heating tube (2-3) plays the role of positioning, 4 hypotenuses concave arc triangle following current gap (a) be made up of 2 right-angle sides and 1 concave arc limit are defined between each coffin of ultrathin deflecting fence (2-2) and the heating tube (2-3) passed through wherein, heating tube (2-3) fluid outward is from top to bottom flowed by this hypotenuse concave arc triangle following current gap (a), form following current, contact gap (b) between the coffin of described ultrathin deflecting fence (2-2) and heating tube (2-3) is very little.

8. there is the methanol column reboiler of fluid well-distributing distributed function according to claim 1, it is characterized in that, the barrel (2-4-1) of the distribution of steam cylinder (2-4) of described band rectangular opening is processed with upper and lower 2 rows' rectangular opening (2-4-2), described rectangular opening (2-4-2) is evenly distributed along barrel (2-4-1) circumference, the width of rectangular opening (2-4-2) is identical, highly be positioned at barrel (2-4-1) centre position the highest, and successively decrease gradually both sides to the left and right with barrel (2-4-1) centre position, during installation, height becomes large gradually along with away from steam inlet pipe (2-6), the highest at the height of the rectangular opening (2-4-2) on the opposite away from steam inlet pipe (2-6).

9. have the methanol column reboiler of fluid well-distributing distributed function according to claim 7, it is characterized in that, the contact gap (b) between the coffin of described ultrathin deflecting fence (2-2) and heating tube (2-3) is maximum only has 0.5mm.