CN205095758U - Methanol to propylene's fixed bed reactor - Google Patents
Methanol to propylene's fixed bed reactor Download PDFInfo
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- CN205095758U CN205095758U CN201520683124.4U CN201520683124U CN205095758U CN 205095758 U CN205095758 U CN 205095758U CN 201520683124 U CN201520683124 U CN 201520683124U CN 205095758 U CN205095758 U CN 205095758U
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Abstract
The utility model relates to a methanol to propylene's fixed bed reactor, include: the reactor casing, setting up in the reactant import at casing top, setting up the several catalyst bed in the casing, set up the reaction product export in the casing bottom, be equipped with in the catalyst bed and get the heat pipe and restraint, should get the heat pipe and restraint the outer methanol to propylene ZSM -5 type catalyst of loading, reactant restraints the outer top -down catalyst bed of flowing through getting the heat pipe, and getting the thermal medium, to get the heat pipe from bottom to top mobile in restrainting, carries out the heat transfer with reactant. Compared with the prior art, the utility model discloses make full use of the reaction of catalyst bed exothermic, reduced the temperature rise of catalyst bed, the energy consumption reduces. Under the equal handling capacity condition, catalyst bed number of piles mesh can be reduced, the reactor height is reduced.
Description
Technical field
The utility model belongs to Coal Chemical Industry, gas chemical industry field, especially relates to a kind of fixed bed reactors of preparing propylene from methanol, is specially a kind of multistage heat-obtaining formula fixed bed reactors structure.
Background technology
Propylene is the base stock of three large synthetic materials, is one of flagship product of petrochemical industry, can be used for producing the multiple important Organic Chemicals such as polypropylene, acrylonitrile, octyl alconyl, expoxy propane, acetone.At present, the propylene of about 95% comes from traditional petroleum path in the world, wherein 60% coproduction coming from preparing ethylene by steam cracking, 35% accessory substance coming from refinery catalytic cracking unit, day by day in short supply along with petroleum resources, the cost being obtained propylene by oil is improved constantly.In addition, in above-mentioned two kinds of main production lines, propylene is accessory substance, also has the propylene of 5% to be generated by other approach such as dehydrogenating propanes.Such line of products structures shape propylene is in the subordinate status of ethylene production for a long time, exacerbates the imbalance of propylene supply and demand.
Preparing propylene from methanol (MTP) technique is with coal-based or natural gas base methyl alcohol for raw material, and by catalytic synthesis, produce the technology of propylene, this technology is particularly suitable for the energy resource structure feature of China's " rich coal, oil-poor, weak breath ".MTP very likely becomes the third-largest stable source of propylene after steam cracking and catalytic cracking.MTP reaction is strong exothermal reaction, exothermic heat of reaction amount is about 31 ~ 45kJ/mol methyl alcohol, if so large thermal discharge does not take any heat-obtaining measure, its reaction bed temperature rise can up to 600 DEG C, so large temperature rise is that MTP catalyst is unaffordable, therefore must take measures on customs clearance and significantly reduce reaction temperature rising.
Existing MTP technology is mainly derived from Lurgi company, and CN101460239A discloses the version of this reactor.Reactor is divided into 6 beds, the product that the product cooling upper bed layer generating dimethyl ether by injecting methanol dehydration between bed flows out, the product of producing dimethyl ether by dehydrating methanol is divided into gas-liquid two-phase to inject between bed, effectively utilizes the liquid product vaporization heat of transformation to reduce upper bed layer product temperature.
CN101653710B discloses a kind of multistage multi-channel radial adiabatic reactor, in this reactor shell, reaction of high order bed is set vertically, each reactor bed is combined by several radial adiabatic reactors, for reducing reactor resistance while reasonable temperature control, improve space reactor utilization rate.
CN103030505A develops a kind of multistage insulation formula reactor for MTP technique, and this reaction can adopt two kinds of methods to reduce bed temperature, and one is adopt between bed to inject Quench logistics cooling, and other method is arrange interior heat collector between bed.The remarkable advantage of the method reacts liberated heat for taking full advantage of MTP, and in order to heat other logistics, energy consumption is low.In addition, usually the heat of vaporization of methanol dehydration dimethyl ether synthesis liquid-phase reaction product is utilized to reduce lower beds inlet temperature in MTP technique, CN104107670 discloses and arranges a packing layer at catalyst bed interlayer, with thinking that liquid-phase product vaporization heat-obtaining provides space, effectively shifts out heat of reaction.
In view of the feature of MTP technique strong exothermal reaction, taking effectively to move the temperature rise that hot measure reduces fixed bed reactors bed is the key that MTP reactor is designed and developed, and what namely the utility model solved strong heat release fixed bed reactors targetedly moves heat problem.
Utility model content
The purpose of this utility model is exactly to overcome the defect that above-mentioned prior art exists and the fixed bed reactors providing a kind of enhanced heat exchange effect, reduce catalyst bed number of layers, reduce the preparing propylene from methanol of total reactor height.
The purpose of this utility model can be achieved through the following technical solutions:
Fixed bed reactors for preparing propylene from methanol, comprising: reactor shell, the reaction raw materials import being arranged on case top, the several beds be arranged in housing, be arranged on the reacting product outlet of housing bottom,
Heat-obtaining tube bank is provided with in described beds, the tube bank of this heat-obtaining is outer loads preparing propylene from methanol ZSM-5 type catalyst, reaction raw materials flows through beds from top to bottom outside heat-obtaining tube bank, and heat-obtaining medium is flowing in heat-obtaining tube bank from bottom to top, carries out heat exchange with reaction raw materials.
The top of described heat-obtaining tube bank is also connected with gas distributor, and heat-obtaining medium enters beds with the gas phase in methanol dehydration dimethyl ether synthesizing reaction product after gas distributor mixes.
Described catalyst bed interlayer is provided with gas distributor, and the gas phase in methanol dehydration dimethyl ether synthesizing reaction product enters beds through gas distributor.
Described heat-obtaining tube bundle top is hatch frame, and heat-obtaining medium directly enters beds through opening.
The open top that described heat-obtaining is restrained is provided with the pipe cap that accommodating sundries falls into.
Described beds is provided with 3-5.
Compared with prior art, the utility model has the following advantages:
(1) reaction heat in beds is fully used, and the C4 ~ C6 hydrocarbon mixture returned in order to heating raw methyl alcohol or vaporization circulation, reduces beds temperature rise, reduce energy consumption.
(2) owing to introducing cooling logistics in beds, the corresponding reduction of beds temperature rise, under the condition that beds temperature rise is equivalent, can many loading catalysts, single bed catalyst loadings increases, under same treating capacity condition, then can reduce catalyst bed number of layers, reduce total reactor height.
(3) Catalyst packing is outside pipe, and space reactor utilization rate is high.Compared with loading catalyst in pipe, Catalyst packing workload reduces.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model in embodiment 1;
Fig. 2 is structural representation of the present utility model in embodiment 2.
In figure, 1-reactor shell, 2-beds, 3-heat-obtaining are restrained, 4-gas distributor, the gas phase in 5-heat-obtaining pipe cap, A-reaction raw materials, B-heat-obtaining medium, C-product, D-methanol dehydration dimethyl ether synthesizing reaction product.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment 1
A kind of fixed bed reactors of preparing propylene from methanol, its structure as shown in Figure 1, comprise: reactor shell 1, the reaction raw materials import being arranged on case top, 3-5 the beds 2 be arranged in housing, be provided with four altogether in the present embodiment, be arranged on the reacting product outlet of housing bottom.Heat-obtaining tube bank 3 is provided with in beds 2, this heat-obtaining tube bank 3 is outer loads preparing propylene from methanol ZSM-5 type catalyst, reaction raw materials A flows through beds from top to bottom outside heat-obtaining tube bank 3, and heat-obtaining medium is flowing in heat-obtaining tube bank from bottom to top, carries out heat exchange with reaction raw materials.Specifically, the reaction raw materials A of methanol dehydration dimethyl ether synthesis enters the first beds of reactor from top, in beds, there is exothermic reaction generate the hydrocarbons such as propylene, heat is taken out by the heat-obtaining medium B in restraining, heat-obtaining medium enters in the heat-obtaining tube bank 3 in reactor first beds through pipeline, there is vaporization reaction, shift out the reaction heat of catalyst bed interlayer.Liquid phase C4 ~ C6 hydro carbons etc. that heat-obtaining medium B can return for the liquid phase in methyl alcohol, methanol dehydration dimethyl ether synthesizing reaction product or MTP product separation Posterior circle.The top of heat-obtaining tube bank 3 is also connected with gas distributor 4, gas phase D in methanol dehydration dimethyl ether synthesizing reaction product enters catalyst bed interlayer through gas distributor 4, after the heat-obtaining medium B after heating and upper catalyst bed reaction product hybrid cooling, enter into lower beds and continue the generation hydrocarbons that reacts, other beds the like.Product C flows out this reactor through reactor outlet and enters cold separation unit.
Embodiment 2
A kind of fixed bed reactors of preparing propylene from methanol, as shown in Figure 2, roughly the same with embodiment 1, difference is its structure, gas distributor 4 is arranged on catalyst bed interlayer, and the gas phase D only in methanol dehydration dimethyl ether synthesizing reaction product enters beds 2 through gas distributor 4.It is hatch frame that heat-obtaining restrains 3 tops, and heat-obtaining medium B directly enters beds through opening, the open top of heat-obtaining tube bank 3 is provided with heat-obtaining pipe cap 5, enters in heat removing tube in order to prevent the foreign material such as catalyst granules.
Claims (6)
1. fixed bed reactors for preparing propylene from methanol, comprising: reactor shell, the reaction raw materials import being arranged on case top, the several beds be arranged in housing, be arranged on the reacting product outlet of housing bottom,
It is characterized in that, be provided with heat-obtaining tube bank in described beds, the tube bank of this heat-obtaining is outer loads preparing propylene from methanol ZSM-5 type catalyst.
2. the fixed bed reactors of a kind of preparing propylene from methanol according to claim 1, is characterized in that, the top of described heat-obtaining tube bank is also connected with gas distributor.
3. the fixed bed reactors of a kind of preparing propylene from methanol according to claim 1, is characterized in that, described catalyst bed interlayer is provided with gas distributor.
4. the fixed bed reactors of a kind of preparing propylene from methanol according to claim 3, is characterized in that, described heat-obtaining tube bundle top is hatch frame.
5. the fixed bed reactors of a kind of preparing propylene from methanol according to claim 4, is characterized in that, the open top that described heat-obtaining is restrained is provided with the pipe cap that accommodating sundries falls into.
6. the fixed bed reactors of a kind of preparing propylene from methanol according to any one of claim 1-5, is characterized in that, described beds is provided with 3-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520683124.4U CN205095758U (en) | 2015-09-06 | 2015-09-06 | Methanol to propylene's fixed bed reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520683124.4U CN205095758U (en) | 2015-09-06 | 2015-09-06 | Methanol to propylene's fixed bed reactor |
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| CN205095758U true CN205095758U (en) | 2016-03-23 |
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| CN201520683124.4U Active CN205095758U (en) | 2015-09-06 | 2015-09-06 | Methanol to propylene's fixed bed reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092215A (en) * | 2018-09-25 | 2018-12-28 | 梁格 | A kind of propylene synthesis reactor |
| CN113559792A (en) * | 2021-07-15 | 2021-10-29 | 成都众奇化工有限公司 | Dimethyl ether synthesis reactor and dimethyl ether synthesis process |
-
2015
- 2015-09-06 CN CN201520683124.4U patent/CN205095758U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092215A (en) * | 2018-09-25 | 2018-12-28 | 梁格 | A kind of propylene synthesis reactor |
| CN109092215B (en) * | 2018-09-25 | 2020-09-01 | 安徽一诺青春工业设计有限公司灵璧分公司 | Propylene synthesis reactor |
| CN113559792A (en) * | 2021-07-15 | 2021-10-29 | 成都众奇化工有限公司 | Dimethyl ether synthesis reactor and dimethyl ether synthesis process |
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