Light component removal tower feeding equipment for DMC refining
阅读说明：本技术 用于dmc精制的脱轻塔给料设备 (Light component removal tower feeding equipment for DMC refining ) 是由 魏力 曹宗元 沈光海 蒋京利 陶玉红 段聪仁 张红 于 2019-10-09 设计创作，主要内容包括：本发明提供一种用于DMC精制的脱轻塔给料设备,涉及碳酸二甲酯生产装置技术领域,包括与所述脱轻塔管路连通的给料装置和与所述给料装置连通的冷凝器,所述冷凝器包括壳体、石墨换热管和石墨折流板,所述石墨换热管纵向设于所述壳体内,若干所述石墨折流板横向设于所述壳体内并且相互交错,所述壳体两侧分别设有进水口和出水口。本发明脱轻塔给料设备中的冷凝器,通过石墨折流板和石墨换热管,大大提高冷凝水的流经路径,增加了换热面积,从而提高冷凝效率。(The invention provides light component removal tower feeding equipment for DMC refining, which relates to the technical field of dimethyl carbonate production devices and comprises a feeding device communicated with a light component removal tower pipeline and a condenser communicated with the feeding device, wherein the condenser comprises a shell, a graphite heat exchange pipe and graphite baffle plates, the graphite heat exchange pipe is longitudinally arranged in the shell, the graphite baffle plates are transversely arranged in the shell and are mutually staggered, and a water inlet and a water outlet are respectively arranged on two sides of the shell. According to the condenser in the lightness-removing tower feeding equipment, the graphite baffle plate and the graphite heat exchange tube are adopted, so that the flowing path of condensed water is greatly improved, the heat exchange area is increased, and the condensing efficiency is improved.)
1. A lightness tower feed apparatus for DMC refinement, comprising:
the feeding device is communicated with the light component removal tower pipeline;
the condenser is communicated with the feeding device; and, the condenser includes:
the water-saving device comprises a shell, a water inlet and a water outlet, wherein a cavity is formed in the shell, the lower end of the shell is provided with the water inlet, and the upper end of the shell is provided with the water outlet;
a graphite heat exchange tube disposed inside the housing along the longitudinal direction inside the housing;
the graphite baffle plates are arranged inside the shell along the transverse direction inside the shell, and the graphite baffle plates are distributed inside the shell in a mutually staggered mode.
2. The lightness-removal column feed apparatus for DMC refinement of claim 1, wherein the condenser further comprises:
the air inlet is positioned at the upper end part of the shell;
the discharge hole is positioned at the lower end part of the shell;
the air inlet is communicated with a pipeline of the feeding device, and the discharge hole is communicated with the pipeline of the feeding device.
3. The lightness-removal column feed apparatus for DMC refinement of claim 2, wherein the condenser further comprises:
and the gas-liquid separation device is positioned at the lower end part, and a gas outlet is formed in the side wall of the gas-liquid separation device.
4. The lightness-removing column feed apparatus for DMC purification according to any one of claims 1 to 3, wherein the housing is provided at both its upper and lower ends with impregnated graphite tube sheets.
5. The light off column feed apparatus for DMC refinement of claim 4, wherein a through hole adapted to said graphite heat exchange tube is provided in said impregnated graphite tube sheet, said graphite heat exchange tube being connected to said housing by being inserted in said through hole.
6. The lightness-removing column feeding apparatus for DMC refinement according to claim 4, wherein an end of the impregnated graphite tube sheet remote from the shell is provided with a graphite end cap.
7. The lightness-removing tower feeding apparatus for DMC refinement according to claim 6, wherein an end of the graphite end enclosure remote from the housing is annularly provided with a connecting flange.
8. The light-ends removal tower feeding equipment for DMC refinement according to claim 6, wherein a counter bore is provided in the middle of the connection surface of the graphite end enclosure and the impregnated graphite tube sheet.
Technical Field
The invention relates to the technical field of dimethyl carbonate production devices, in particular to a light component removal tower feeding device for DMC refining.
Background
Dimethyl carbonate (DMC) is an important organic synthesis intermediate, contains functional groups such as carbonyl, methyl, methoxy and the like in a molecular structure, has various reaction performances, is an environment-friendly green chemical product due to very wide application, is one of important organic chemical raw materials, and enjoys the name of an organic synthesis new-base stone product.
In the light component removing tower feeding equipment adopted in the rectifying, separating and purifying link, a condenser in the coarse DMC feeding equipment has the function of recovering condensed light component gas into a coarse DMC feeding tank, and the light component gas which cannot be condensed is removed from a light component feeding washing tower and an alkali treatment tank for treatment. However, existing lightness-removing column feeding equipment has a small condenser area.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a light component removal tower feeding device for DMC refining, which solves the technical problems that the heat transfer efficiency is low and the production scale of DMC refining is limited due to the small heat exchange area of a condenser of the existing light component removal tower feeding device.
In order to achieve the purpose, the invention provides the following technical scheme:
a lightness tower feed apparatus for DMC refinement, comprising:
the feeding device is communicated with the light component removal tower pipeline;
the condenser is communicated with the feeding device; and, the condenser includes:
the water-saving device comprises a shell, a water inlet and a water outlet, wherein a cavity is formed in the shell, the lower end of the shell is provided with the water inlet, and the upper end of the shell is provided with the water outlet;
a graphite heat exchange tube disposed inside the housing along the longitudinal direction inside the housing;
the graphite baffle plates are arranged inside the shell along the transverse direction inside the shell, and the graphite baffle plates are distributed inside the shell in a mutually staggered mode.
Preferably, the condenser further comprises:
the air inlet is positioned at the upper end part of the shell;
the discharge hole is positioned at the lower end part of the shell;
the air inlet is communicated with a pipeline of the feeding device, and the discharge hole is communicated with the pipeline of the feeding device.
Preferably, the condenser further comprises:
and the gas-liquid separation device is positioned at the lower end part, and a gas outlet is formed in the side wall of the gas-liquid separation device.
Preferably, the upper end and the lower end of the shell are both provided with impregnated graphite tube plates.
Preferably, a through hole matched with the graphite heat exchange tube is formed in the impregnated graphite tube plate, and the graphite heat exchange tube is connected with the shell through being inserted into the through hole.
Preferably, a graphite end socket is arranged at one end, far away from the shell, of the impregnated graphite tube plate.
Preferably, a connecting flange is annularly arranged at one end, far away from the shell, of the graphite end socket.
Preferably, a counter bore is arranged in the middle of the connecting surface of the graphite end socket and the impregnated graphite tube plate.
The embodiment of the invention provides a light component removal tower feeding device for DMC refining, which has the following beneficial effects:
the graphite heat exchange tubes are arranged in the shell of the condenser along the longitudinal direction, the graphite baffle plates are arranged in the transverse direction, the graphite heat exchange tubes are distributed in the shell, and the graphite baffle plates are distributed in the shell in a mutually staggered manner, so that the heat exchange area is increased and the heat transfer efficiency is increased compared with the existing condenser; and the material has strong impact resistance and high pressure resistance (1.0MPa), can meet the requirements of acid, alkali, organic solvent and other use conditions, and has wide application range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a partial structural view of the condenser of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The DMC production process includes combining fresh CO gas from the carbon light separation step with DMC circulating gas compressor outlet gas, preheating, feeding into DMC reactor, reacting in gas phase with palladium chloride catalyst at corresponding temperature and pressure to produce DMC and simultaneously produce nitrogen monoxide (NO), NO, Methanol (ME) and oxygen (O) 2) And (3) Methyl Nitrite (MN) generated by reaction in the MN regeneration tower is pressurized by a compressor and then sent into the reactor for synthesizing DMC. And (3) sending the crude DMC solution generated by the reaction to a DMC purification process for rectification, separation and purification, thereby obtaining DMC with the purity of more than 99.9%.
In the light component removing tower feeding equipment adopted in the link of rectifying, separating and purifying the coarse DMC solution in the DMC refining process, corrosive toxic and harmful substances such as dimethoxymethane (ML), Methyl Formate (MF), methyl chloroformate (McF), HCL, CL-and the like are contained in the coarse DMC material medium. Because the crude DMC in the crude DMC feeding tank contains a certain amount of dimethyl oxalate (DMO), the melting point of the dimethyl oxalate (DMO) is 54 ℃, and the dimethyl oxalate (DMO) can crystallize when the temperature is lower than 50 ℃, the crude DMC feeding tank needs to be heated by hot water, the use temperature is kept between 65 and 70 ℃, the dimethyl oxalate (DMO) is prevented from crystallizing, meanwhile, partial materials such as DMO, ML, MF, methanol and the like can volatilize into gas after the crude DMC material is heated, a condenser in the crude DMC feeding device has the function of recovering the condensation into the crude DMC feeding tank, and the light component gas which cannot be condensed is removed from a light component feeding washing tower and an alkali treatment tank for treatment.
As shown in the attached fig. 1 and 2, the lightness-removing tower feeding equipment for DMC refining comprises a feeding device 1 communicated with the lightness-removing tower pipeline and a condenser 2 communicated with the feeding device, wherein the condenser 2 comprises a shell 3, a graphite heat exchange tube 4 and a plurality of
And a water inlet 6 and a
In the embodiment, the
In one embodiment, an air inlet hole 8 is formed in the upper end of the condenser 2, a discharge hole 9 is formed in the lower end of the condenser 2, the upper end of the condenser 2 is communicated with the feeding device 1 through the air inlet hole 8, and the lower end of the condenser 2 is communicated with the feeding device 1 through the discharge hole 9. As shown in fig. 1, the air inlet 8 and the air outlet 9 of the condenser 2 are communicated with the feeding device 1.
In one embodiment, the feeding device 1 is disposed at the lower end of the condenser 2, i.e. the lower end of the shell 3, as shown in fig. 1 and 2, i.e. the gas-
In one embodiment, the shell 3 is provided with impregnated
Specifically, a through hole matched with the graphite heat exchange tube 4 is formed in the impregnated
In summary, the following steps: after the crude DMC enters the feeding device 1, volatile gas of the crude DMC enters the condenser 2 through the gas inlet 8 to be condensed, then a mixture of condensate and non-condensable gas enters the gas-
Because the cooling medium adopted by the condenser is circulating water, and water and dimethyl oxalate (DMO) cannot leak into the coarse DMC medium, because dimethyl oxalate (DMO) reacts with water to generate oxalate, the dimethyl oxalate (DMO) in the medium corrodes equipment in subsequent devices and simultaneously blocks a light component removal tower and a DMC separation tower to cause the tower to form a flooding phenomenon, the normal separation work of the tower is seriously influenced, and the performance comparison result of the condenser in the invention embodiment with the prior condenser is as follows:
the equipment adopted by the invention replaces the existing feeding equipment in the application practice, and has obvious advantages: the heat exchange efficiency is high, the gas condensation recovery rate is 96%, the equipment cost is low in economy, the service life is long, and the investment and production cost are reduced; in conclusion, the improvement optimizes the process equipment, improves the stability of the device and reduces the investment and the operating cost.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种笼式浮阀及其生产工艺