CN-122006595-A - Green methanol synthesis tower of off-pipe reaction and reaction gas distribution device

CN122006595ACN 122006595 ACN122006595 ACN 122006595ACN-122006595-A

Abstract

The invention provides an external-tube reaction green methanol synthesis tower and a reaction gas distribution device, which belong to the technical field of green methanol production by coupling renewable energy sources and chemical industry, wherein the device comprises a main shell, a synthesis tower, a reaction gas distribution pipe and a methanol collector, wherein one end of the heat exchange pipe is fixed on an upper pipe plate and communicated with an upper pipe cavity, the other end of the heat exchange pipe is fixed on a lower pipe plate and communicated with a lower pipe cavity, the reaction gas distribution pipe sequentially penetrates through an upper end enclosure, a cylinder body and a lower end enclosure, a plurality of distribution holes are formed in the reaction gas distribution pipe, and the distribution holes are communicated with the cylinder body; a green methanol synthesis reaction zone is formed among the methanol collector, the reaction gas distributing pipe, the upper pipe plate and the lower pipe plate, a green catalyst for methanol synthesis is filled in the green methanol synthesis reaction zone, a green methanol collecting zone is formed between the methanol collector and the peripheral wall of the cylinder, and a plurality of methanol outlets are arranged on the outer wall of the cylinder. The reaction gas of the device enters from the center of the cylinder body and flows out from the periphery, the reaction area has large space outside the tube, long residence time and reaction time, small airflow resistance and more sufficient reaction.

Inventors

GAO YUANFENG
JIA BINHONG
ZHANG YIKUN
GAO NINGNING
Wu jiujiang
ZHANG XU
LI YUE
TANG HUI
ZHANG MINGBAO
YU ZEZHONG
FANG XIAOLI
WANG FEI
HAN JIAN
FU JIKUN
TIAN LU

Assignees

哈尔滨锅炉厂有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260113

Claims (10)

1. An outside-tube reaction green methanol synthesis tower and a reaction gas distribution device, which are characterized by comprising: the main shell comprises a lower end socket (1), a cylinder (3) and an upper end socket (5) which are fixedly connected in sequence; The synthesis tower comprises a lower tube plate (2), an upper tube plate (4) and a plurality of heat exchange tubes (11), wherein the lower tube plate (2) is fixedly arranged between the lower tube plate (1) and the cylinder body (3), the upper tube plate (4) is fixedly arranged between the upper tube plate (5) and the cylinder body (3), the plurality of heat exchange tubes (11) are all positioned in the cylinder body (3), a lower tube cavity is formed between the lower tube plate (2) and the lower tube plate (1), an upper tube cavity is formed between the upper tube plate (4) and the upper tube plate (5), one end of the heat exchange tube (11) is fixed on the upper tube plate (4) and is communicated with the upper tube cavity, the other end of the heat exchange tube is fixed on the lower tube plate (2) and is communicated with the lower tube cavity, the lower tube plate (1) is provided with a water inlet (16), the water inlet (16) is communicated with the lower tube cavity, the upper tube (5) is provided with a saturated steam outlet (6), and the saturated steam outlet (6) is communicated with the upper tube cavity. The reaction gas distribution pipe (7), the reaction gas distribution pipe (7) is sequentially arranged on the upper seal head (5), the cylinder body (3) and the lower seal head (1) in a penetrating way, the reaction gas distribution pipe (7) is provided with a plurality of distribution holes (704), and the distribution holes (704) are communicated with the cylinder body (3); the methanol synthesis device comprises a methanol collector (10), wherein the methanol collector (10) is arranged in a barrel (3), a green methanol synthesis reaction zone is formed among the methanol collector (10), a reaction gas distribution pipe (7), an upper tube plate (4) and a lower tube plate (2), a green catalyst (13) for methanol synthesis is filled in the green methanol synthesis reaction zone, a green methanol collection zone is formed between the methanol collector (10) and the peripheral wall of the barrel (3), a plurality of methanol outlets (12) are formed in the outer wall of the barrel (3), and the methanol outlets (12) are communicated with the green methanol collection zone.
2. The green methanol synthesis tower and the reaction gas distribution device for the external reaction of the pipe according to claim 1, wherein the lower pipe cavity is provided with a plurality of water inlet partition plates (15), the lower pipe cavity is divided into a plurality of sub-cavities by the plurality of water inlet partition plates (15), the plurality of sub-cavities, the plurality of heat exchange pipes (11) and the plurality of water inlets (16) are communicated in a one-to-one correspondence manner.
3. The green methanol synthesis tower and the reaction gas distribution device for the external reaction of the pipe according to claim 1, wherein the upper pipe cavity is provided with a steam-water uniform distribution plate (8), the steam-water uniform distribution plate (8) is positioned between the upper pipe plate (4) and the saturated steam outlet (6), and the steam-water uniform distribution plate (8) is provided with a plurality of steam openings.
4. The green methanol synthesis tower and the reaction gas distribution device for the external reaction of the pipe according to claim 1, wherein the reaction gas distribution pipe (7) comprises an upper non-perforated section (703), a perforated section (702) and a lower non-perforated section (701) which are sequentially connected, the upper non-perforated section (703) is positioned in an upper pipe cavity, the perforated section (702) is positioned in a green methanol synthesis reaction zone, the lower non-perforated section (701) is positioned in a lower pipe cavity, and the distribution holes (704) are formed in the perforated section (702).
5. The external reaction green methanol synthesis tower and the reaction gas distribution device according to claim 1, wherein both ends of the reaction gas distribution pipe (7) are air inlet ends.
6. The green methanol synthesis tower and the reaction gas distribution device for the out-of-tube reaction of claim 1, wherein the methanol collector (10) comprises an upper cone (1004), a collector cylinder (1002) and a lower cone (1001) which are sequentially connected, the upper cone (1004) is provided with a vent hole, the collector cylinder (1002) is provided with a collecting hole (1005), and the lower cone (1001) is provided with a cleaning port.
7. The green methanol synthesis tower and the reaction gas distribution device for the off-pipe reaction of claim 6, wherein the methanol collector (10) further comprises a plurality of supporting guides (1003), and the plurality of supporting guides (1003) are uniformly and fixedly arranged on the collector cylinder (1002).
8. The green methanol synthesis tower and the reaction gas distribution apparatus for the off-pipe reaction according to claim 7, wherein the supporting and guiding body (1003) is in the form of angle steel (1003-1), round steel (1003-2) or plate (1003-3).
9. The apparatus for synthesizing green methanol and distributing reactant gas in an off-pipe reaction according to claim 1, wherein the top of said water inlet partition plate (15) is provided with an exhaust hole (1502), the middle is provided with a balancing hole (1501), and the bottom is provided with a communicating drain gap (1503).
10. The green methanol synthesis tower and the reaction gas distribution device for the external reaction of the pipe according to claim 1, wherein the upper end of the outer wall of the cylinder body (3) is provided with an inclined charging port (9), and the lower end is provided with an inclined discharging port (14).

Description

Green methanol synthesis tower of off-pipe reaction and reaction gas distribution device Technical Field The invention belongs to the technical field of green methanol production by coupling renewable energy sources and chemical industry, and particularly relates to an external-pipe reaction green methanol synthesis tower and a reaction gas distribution device. Background With the further development of renewable energy sources in China, wind power and photoelectricity in northwest and North China form a certain scale, the condition that the power demand is smaller than the power supply occurs, and the problem of light and wind abandoning of a power grid is serious. In order to solve the problem, the nation promotes the coupling green development of the new energy industry and the chemical industry, and the rich wind and photoelectricity are used for in-situ electrolysis of water to prepare raw material hydrogen for synthesizing methanol in chemical industry, and the hydrogen is used for preparing green methanol. Or green methanol is prepared by organisms in areas with rich biomass such as northeast. When the renewable energy source is used for preparing the green methanol, the problems of waste caused by unstable gas flow at the inlet of the green methanol synthesis reactor and insufficient catalyst use due to the influence of weather factors such as wind, sunlight and the like and biomass supply exist, and the requirements on a reaction gas inlet and outlet distribution device and a reaction gas outlet distribution method are high. The methanol synthesis reaction takes carbon monoxide, carbon dioxide and hydrogen as raw materials, and the carbon monoxide, the hydrogen, the carbon dioxide and the hydrogen generate methanol under the action of a catalyst. A shell-and-tube heat exchanger for the saturated water vapor as the by-product outside the heat exchange tube is filled with catalyst in the tube of the traditional methanol synthesis tower. The reaction gas of the synthesis tower is distributed in the pipe, so that the catalyst is difficult to be filled in the pipe, the system resistance is large, the resistance drop of each heat exchange pipe is inconsistent, and the flow bias is easy to be caused, so that the reaction is not easy to be carried out. And the traditional reactor gas distribution device is, just to equipment gas inlet, simply set up one with slightly be greater than the baffle of entry bore, the baffle passes through a plurality of flat steel strip to be fixed in the entrance, and gas gets into inside equipment and the reaction of catalyst from between the flat steel strip prepares methyl alcohol. The traditional gas distribution device can not realize the effect that gas is uniformly distributed to a catalyst reaction zone for inlet reaction gas with unstable flow, so that the stability of equipment operation is affected, the uneven distribution causes uneven reaction, the catalyst in the reaction zone is unevenly used, the catalyst can only be integrally replaced, the utilization efficiency of the catalyst is reduced, and the use cost of the catalyst is increased. Disclosure of Invention In view of the above, the present invention provides an off-line reaction green methanol synthesis tower and a reaction gas distribution device. In order to achieve the above purpose, the present invention adopts the following technical scheme: an external reaction green methanol synthesis tower and a reaction gas distribution device, comprising: the main shell comprises a lower end socket, a cylinder body and an upper end socket which are fixedly connected in sequence; The synthesis tower comprises a lower tube plate, an upper tube plate and a plurality of heat exchange tubes, wherein the lower tube plate is fixedly arranged between a lower end socket and a cylinder body, the upper tube plate is fixedly arranged between the upper end socket and the cylinder body, the plurality of heat exchange tubes are all positioned in the cylinder body, a lower tube cavity is formed between the lower tube plate and the lower end socket, an upper tube cavity is formed between the upper tube plate and the upper end socket, one end of each heat exchange tube is fixed on the upper tube plate and communicated with the upper tube cavity, the other end of each heat exchange tube is fixed on the lower tube plate and communicated with the lower tube cavity, the lower end socket is provided with a water inlet, the water inlet is communicated with the lower tube cavity, the upper end socket is provided with a saturated steam outlet, and the saturated steam outlet is communicated with the upper tube cavity; The reaction gas distribution pipe sequentially penetrates through the upper seal head, the cylinder body and the lower seal head and is provided with a plurality of distribution holes which are communicated with the cylinder body; The methanol collector is arranged in the cylinder, a green methanol synthesis reaction zone is