CN106237935A - The fixing reaction bed of the novel oxidator of methanol without tube sheet - Google Patents
The fixing reaction bed of the novel oxidator of methanol without tube sheet Download PDFInfo
- Publication number
- CN106237935A CN106237935A CN201610689684.XA CN201610689684A CN106237935A CN 106237935 A CN106237935 A CN 106237935A CN 201610689684 A CN201610689684 A CN 201610689684A CN 106237935 A CN106237935 A CN 106237935A
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- China
- Prior art keywords
- reaction bed
- tube sheet
- bed
- oxidator
- fixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0242—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/008—Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0285—Heating or cooling the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0292—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds with stationary packing material in the bed, e.g. bricks, wire rings, baffles
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/37—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups
- C07C45/38—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups being a primary hydroxyl group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00884—Means for supporting the bed of particles, e.g. grids, bars, perforated plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/02—Processes carried out in the presence of solid particles; Reactors therefor with stationary particles
- B01J2208/023—Details
- B01J2208/027—Beds
Abstract
The present invention relates to the fixing reaction bed of a kind of novel oxidator of methanol without tube sheet, including cylinder, described cylinder top is provided with conversion zone, described conversion zone top is formed with oxygen reaction room, described conversion zone bottom is fixing reaction bed, the bottom of described fixing reaction bed is provided with heat transfer spray system, is positioned on a sidewall of cylinder and is provided with reaction gas outlet.The present invention is high-performance reactor, maintains the leading position, and service life of equipment was up to 10 ~ 15 years, and production capacity can reach more than 200,000 tons/year.Market prospect is considerable.
Description
Technical field
The present invention relates to reaction bed applied technical field, the fixing reaction of a kind of novel oxidator of methanol without tube sheet
Bed.
Background technology
Owing to needing (630 degrees Celsius ~ 650 degrees Celsius) at high operating temperatures to carry out oxidative dehydrogenation when silver method technique produces formaldehyde
Reaction prepares formaldehyde gas.Demand by high-temperature region, prevents over oxidation from producing by-product within the shortest time.Oxidation
Dehydrogenation reaction is an exothermic reaction, produces substantial amounts of heat energy in course of reaction simultaneously, and this partial heat energy need to be in time by changing
Hot form changes into the energy (steam) of other form, and reacting gas is cooled down in heat exchanger tube by reacting gas by the rapidest,
Thus ensure product quality indicator, do not cause product defective because of high temperature acidified.Methanol oxidator is the important life producing formaldehyde
Produce device all of reaction conversion to complete the most in the reactor.Owing to working condition is the harshest, equipment is caused greatly
Injury.General oxidator service life was in 2 ~ 3 years.Oxidator primary structure is fixing reaction bed and fixed tube-sheet exchanger two
Part composition.
Main reason hurtful to equipment is:
1, containing substantial amounts of hydrogen in reaction product, stainless steel material and welding position under the condition of high temperature, is made to produce hydrogen embrittlement and answer
Power is corroded, and causes weld cracking.
2, due to use after quality of parent material change (hydrogen embrittlement), welding performance is substantially reduced, and keeps in repair extremely difficult, often
Equipment leakage problem can only be solved by the method for closure heat exchange pipeline.Cause the forfeiture of heat exchange area, affect gas cooling, simultaneously
Gas flux reduces, and SR rises, for ensureing that product quality can only maintain normal operating by reducing yield.
3, cooling water produces portion gas in evaporation and stainless steel pipes is produced cavitation, simultaneously as tube sheet upper end is anti-
Answering side temperature at 630 DEG C ~ 650 DEG C, hot side temperature 150 DEG C ~ 155 DEG C (medium is water, pressure 0.25MPa) is changed in tube sheet lower end, and two
Side thermal coefficient of expansion differs greatly, and easily causes the heat exchanger tube being fixedly welded on tube sheet to be retrained by two ends tube sheet, heat exchange
Pipe lost efficacy in the fracture of thermal junction chalaza.
4, the restriction of production capacity: production capacity is directly proportional by catalyst reaction area and gas flux to reactant, response area
The biggest, production capacity is the biggest.Due to working condition, the particularity of device structure, single device maximum production capacity is 80,000 the most both at home and abroad
Ton/year, the biggest equipment of production capacity produces the probability the highest (mainly heat exchanger tube weld cracking and fracture) lost efficacy.So existing in production capacity
Less than 80000 tons/year or the most both economical (owing to equipment is an overall structure form, change a production capacity 80,000 tons/year
The necessary integral replacing of reactor, and replacement cost is about at 1,000,000 yuans).
Summary of the invention
The applicant is for the shortcoming in above-mentioned existing production technology, it is provided that a kind of novel methanol without tube sheet rational in infrastructure
The fixing reaction bed of oxidator, thus it is greatly prolonged service life, improve reaction efficiency, reduce production cost.
The technical solution adopted in the present invention is as follows:
The fixing reaction bed of a kind of novel oxidator of methanol without tube sheet, including cylinder, described cylinder top is provided with conversion zone, institute
Stating conversion zone top and be formed with oxygen reaction room, described conversion zone bottom is fixing reaction bed, the bottom of described fixing reaction bed
Heat transfer spray system is installed, is positioned on a sidewall of cylinder and reaction gas outlet is installed.
Further improvement as technique scheme:
The structure of described fixing reaction bed is: include that catalyst silk screen supports, and the lower weld that described catalyst silk screen supports has
Reaction bed grid, substitutes original heat exchange tube sheet as catalyst support with reaction bed grid, on described catalyst silk screen supports
It is evenly distributed with multiple square hole.
Beneficial effects of the present invention is as follows:
Present configuration is compact, reasonable, easy to operate, by changing the structure of fixing reaction bed, so considerably increases perforate
Rate, improves reacting gas flux, reduces gas system resistance, and production capacity gets a promotion.Due to the independent structure of reaction bed, without heat exchange
The constraint of pipe, the upper and lower two ends temperature difference is little, and thermal expansion amount is relatively uniform, and Catalytic Layer is difficult to cracking situation.This reaction bed can
It is individually replaced, with low cost.
The present invention has the further advantage that
(1) improve the service life of reactor, reduce production cost.
(2) device fabrication cost is reduced.
(3) in the case of identical device size, improve the production capacity of single device, produce in the case of same reaction area
40% can be improved.
(4) SR declines 20%, energy efficient.
The present invention is high-performance reactor, maintains the leading position, and service life of equipment was up to 10 ~ 15 years, and production capacity can reach
More than 200000 tons/year.Market prospect is considerable.
The present invention is in the case of without tube sheet support reaction bed, it is ensured that the stability in the large of reaction bed so that it is when producing
Catalyst layer will not crack, and the increase of the consumption of raw materials amount caused.
Accompanying drawing explanation
Fig. 1 is the application drawing of the present invention.
Fig. 2 is the front view of reaction bed of the present invention.
Fig. 3 is the top view of Fig. 2.
Wherein: 1, oxygen reaction room；2, conversion zone；3, fixing reaction bed；301, catalyst silk screen supports；302, reaction bed
Grid；4, heat transfer spray system；5, cylinder；6, reaction gas outlet.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described.
As shown in Figure 1, Figure 2 and Figure 3, the fixing reaction bed of the novel oxidator of methanol without tube sheet of the present embodiment, including cylinder
Body 5, cylinder 5 top is provided with conversion zone 2, and conversion zone 2 top is formed with oxygen reaction room 1, and conversion zone 2 bottom is fixing reaction
Bed 3, the bottom of fixing reaction bed 3 is provided with heat transfer spray system 4, is positioned at and is provided with reacting gas on a sidewall of cylinder 5 and goes out
Mouth 6.
The structure of fixing reaction bed 3 is: including that catalyst silk screen supports 301, catalyst silk screen supports the lower weld of 301
Responding a grid 302, catalyst silk screen supports and is evenly distributed with multiple hole on 301.
Fixing reaction bed 3 is that reaction converts the place laying catalyst, and former reaction bed is with heat exchange tube sheet for relying on above
Re-lay copper mesh, have enough intensity, after now removing heat exchange tube sheet, the component supporting copper mesh need to be reset.This component is necessary
There are enough strength and stabilities, and at high temperature thermal expansion amount to control in certain scope, to ensure that catalyst is being given birth to
Occur without crackle during product, and affect consumption of raw materials and product quality indicator.It addition, reacting gas can be made to run through high-temperature area
(i.e. reducing resistance), prevents reacting gas deep oxidation from generating by-product.
Use mesh grille structure for this component, according to the allowable stress of material under reaction temperature, calculate the height at grid
Degree and mesh spacing, it is ensured that during production, fixed bed will not be produced and deformation.According to the calculated results, new construction gas energy is comparable
The flux of original structure improves about 40%.(original structure is that tube sheet percent opening is 40% ~ 45%, and newly ties with heat exchange tube sheet for relying on
Structure flux can reach more than 90%).Manufacture welding requirements and be substantially reduced that (a all uses fillet welding, and undesired seal weld.B reacts
Bed temperature difference up and down is the least, does not deposit thermal stress issues, causes deformation and weld cracking).Manufacture and focus on ensureing the flat of grid
Whole degree, this is easy to be ensured by processing technique means and frock.Due to the raising of flux, on the one hand SR subtracts
Little, reacting gas, at high-temperature region shorter residence time, also implies that, can allow more in the case of equivalent responses area
Reacting gas passes through, and improves the production capacity of single device.
The reasonability of manufacturing process: all design premises must assure that equipment can be real fully according to technique in the course of processing
Execute, it is to avoid cause difficulty of processing and increase processing cost.To this end, coordinate design, production, technology, technique are true before construction
Fixed rational production technology, it is ensured that the quality of product and project can reach design effect.
Above description is explanation of the invention, is not the restriction to invention, and limited range of the present invention sees right
Requirement, within protection scope of the present invention, can make any type of amendment.
Claims (2)
1. the fixing reaction bed of the novel oxidator of methanol without tube sheet, it is characterised in that: include cylinder (5), described cylinder (5)
Top is provided with conversion zone (2), and described conversion zone (2) top is formed with oxygen reaction room (1), and described conversion zone (2) bottom is
Fixing reaction bed (3), the bottom of described fixing reaction bed (3) is provided with heat transfer spray system (4), is positioned at the side of cylinder (5)
Reaction gas outlet (6) is installed on wall.
The fixing reaction bed of the novel oxidator of methanol without tube sheet the most as claimed in claim 1, it is characterised in that: described fixing anti-
The structure answering bed (3) is: including that catalyst silk screen supports (301), described catalyst silk screen supports the lower weld of (301) to be had instead
Answering bed grid (302), described catalyst silk screen supports and is evenly distributed with multiple hole on (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689684.XA CN106237935A (en) | 2016-08-19 | 2016-08-19 | The fixing reaction bed of the novel oxidator of methanol without tube sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689684.XA CN106237935A (en) | 2016-08-19 | 2016-08-19 | The fixing reaction bed of the novel oxidator of methanol without tube sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106237935A true CN106237935A (en) | 2016-12-21 |
Family
ID=57592979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610689684.XA Pending CN106237935A (en) | 2016-08-19 | 2016-08-19 | The fixing reaction bed of the novel oxidator of methanol without tube sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106237935A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973580A (en) * | 2021-02-08 | 2021-06-18 | 湖北昌发容器制造有限公司 | Acid-resistant high-temperature-resistant mercury-free catalyst catalytic vinyl chloride converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4087252A (en) * | 1976-10-07 | 1978-05-02 | Chevron Research Company | Fluids mixing and distributing apparatus |
| US4127389A (en) * | 1977-04-04 | 1978-11-28 | Pullman Incorporated | Exchanger reactor |
| CN201493095U (en) * | 2009-08-31 | 2010-06-02 | 湖北侨光石化机械有限责任公司 | Catalyst support disc |
| CN201776148U (en) * | 2010-08-05 | 2011-03-30 | 石家庄天诚特种设备有限公司 | Epoxy ethane reactor support grid |
| CN104772080A (en) * | 2015-03-24 | 2015-07-15 | 江苏凯茂石化科技有限公司 | Over 120000 ton level long-life formaldehyde oxidation device |
| CN205127916U (en) * | 2015-10-26 | 2016-04-06 | 中国成达工程有限公司 | Formaldehyde reactor |
| CN205886830U (en) * | 2016-08-19 | 2017-01-18 | 无锡市华立石化工程有限公司 | Novel fixation reaction bed of no tube sheet methanol oxidation ware |
-
2016
- 2016-08-19 CN CN201610689684.XA patent/CN106237935A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4087252A (en) * | 1976-10-07 | 1978-05-02 | Chevron Research Company | Fluids mixing and distributing apparatus |
| US4127389A (en) * | 1977-04-04 | 1978-11-28 | Pullman Incorporated | Exchanger reactor |
| CN201493095U (en) * | 2009-08-31 | 2010-06-02 | 湖北侨光石化机械有限责任公司 | Catalyst support disc |
| CN201776148U (en) * | 2010-08-05 | 2011-03-30 | 石家庄天诚特种设备有限公司 | Epoxy ethane reactor support grid |
| CN104772080A (en) * | 2015-03-24 | 2015-07-15 | 江苏凯茂石化科技有限公司 | Over 120000 ton level long-life formaldehyde oxidation device |
| CN205127916U (en) * | 2015-10-26 | 2016-04-06 | 中国成达工程有限公司 | Formaldehyde reactor |
| CN205886830U (en) * | 2016-08-19 | 2017-01-18 | 无锡市华立石化工程有限公司 | Novel fixation reaction bed of no tube sheet methanol oxidation ware |
Non-Patent Citations (3)
| Title |
|---|
| 中国石油和石化工程研究会: "《石油炼制-润滑油和石蜡》", 31 October 2000, 中国石化出版社 * |
| 李菁菁等: "《硫磺回收技术与工程》", 31 December 2010, 石油工业出版社 * |
| 韩文光: "《化工装置实用操作技术指南》", 31 October 2001, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973580A (en) * | 2021-02-08 | 2021-06-18 | 湖北昌发容器制造有限公司 | Acid-resistant high-temperature-resistant mercury-free catalyst catalytic vinyl chloride converter |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |