Uniform heating type spiral plate fixed bed reactor for gas-solid catalytic reaction

A fixed-bed reactor and fixed-bed reaction technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem of poor heat transfer effect, low utilization rate of catalyst bed space, and difficulty in large-scale devices, etc. problem, to achieve the effect of not easy to foul and block, high production capacity, large volume utilization rate

Inactive Publication Date: 2018-08-21
QINGDAO KEDA LONGTENG TECH DEV +2
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  • Abstract
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Problems solved by technology

[0007] In order to solve the technical problems of the existing shell-and-tube fixed bed reactor with poor heat transfer effect on the shell side, low space utilization rate of th

Method used

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  • Uniform heating type spiral plate fixed bed reactor for gas-solid catalytic reaction
  • Uniform heating type spiral plate fixed bed reactor for gas-solid catalytic reaction
  • Uniform heating type spiral plate fixed bed reactor for gas-solid catalytic reaction

Examples

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Embodiment 1

[0030] 150,000 tons / year dimethyl oxalate (DMO) hydrogenation reactor

[0031] When the reactor of the present invention is used as a 150,000-ton / year DMO hydrogenation reactor, 8 sections of spiral plate reaction sections are required after calculation, and its structure is shown in image 3 and Figure 4 . The heat exchange medium inlet 1 is set on the top side of the reactor, and the outlet 2 is set on the upper side of the reactor. The gas enters the reactor from the top air inlet 3, passes through the catalyst fixed bed (8-15) to react, and leaves the reactor together with the product through the bottom gas outlet 4; the heat exchange medium passes through the annular pipe distributor 5 at the top of the reactor , distributed in proportion to the outer inlet of each spiral plate reaction section (08-15) by a number of distribution pipes 6, the heat is exchanged by the heat exchange medium channel spirally, and after the central pipe 7 entering the center of the reaction...

Embodiment 2

[0037] 35,000 tons / year vinyl acetate synthesis reactor

[0038] When the reactor of the present invention is used as a 35,000-ton / year vinyl acetate synthesis reactor, 10 sections of spiral plate reaction sections are needed after accounting, and its structure is shown in Figure 5 and Figure 6 . In order to further enhance the heat exchange effect, a heat exchange medium is installed in each spiral plate reaction section to realize segmental temperature control, specifically: the heat exchange medium inlets 2 and 5-1 (medium temperatures can be the same or different) are set at The lower part of the spiral plate reaction section is connected to the outside of the heat exchange medium channel inside the reaction section. The heat exchange medium is spirally exchanged by the heat exchange medium channel. After entering the central tube 6-1 in the center of the reaction section, it flows out from the heat exchange medium outlet 1. The gas enters the reactor through the top g...

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Abstract

The invention relates to a uniform heating type spiral plate fixed bed reactor for a gas-solid catalytic reaction. The uniform heating type spiral plate fixed bed reactor for a gas-solid catalytic reaction comprises a gas phase inlet, a gas phase outlet, a heat exchange medium inlet and a heat exchange medium outlet; one or more spiral plate fixed bed reaction sections are arranged in the reactor.The uniform heating type spiral plate fixed bed reactor for the gas-solid catalytic reaction has the advantages that: (1) a shell pass heat exchange coefficient is remarkably increased, so that the total heat transfer coefficient is increased, a heat transfer effect is enhanced, and the heat transfer temperature difference is reduced; (2) the heat transfer distance and the heat transfer area canbe controlled flexibly, which is beneficial to the uniformity and the control of the temperature of a reaction bed layer; (3) the capacity utilization rate is highest (the highest capacity utilizationrate can reach 70 percent or above, and the highest capacity utilization rate of a shell and tube reactor is about 40 percent), the capacity of a single set of equipment is high, and the occupied area and the investment are remarkably reduced; (4) a heat exchange medium channel has a self-cleaning effect, and dirt and blockage are not produced easily.

Description

technical field [0001] The invention relates to a fixed-bed reactor, in particular to a homogeneous spiral-plate fixed-bed reactor for gas-solid catalytic reaction. Background technique [0002] Fixed bed catalytic reactors are widely used in chemical industry and petroleum industry. [0003] The advantages of the fixed bed reactor are: ① small back mixing, effective contact between the fluid and the catalyst, and high selectivity when the reaction is accompanied by series side reactions; ② small mechanical loss of the catalyst; ③ simple structure. Its disadvantages are: ①The heat transfer effect of the shell side is poor, especially for strong exothermic reactions, it is prone to runaway temperature (the reaction temperature is out of control, rises sharply, exceeding the allowable range); ②The catalyst cannot be replaced during operation, and the catalyst needs to be frequently regenerated The reaction is generally not suitable for use, and it is often replaced by a fluid...

Claims

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Application Information

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IPC IPC(8): B01J8/02C07C29/149C07C31/20C07C67/00C07C69/15
CPCB01J8/0271B01J8/008B01J8/0285C07C29/149C07C67/00C07C31/202C07C69/15
Inventor 陈光辉王宇光董纪鹏谷新春马文华周艳霞赵振坤李建隆
Owner QINGDAO KEDA LONGTENG TECH DEV
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