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Flexibly configured circular reaction system and circular reaction process

A cyclic reaction and flexible technology, applied in the field of chemical engineering, can solve the problems of surge safety hazards, fragile adaptability, high energy consumption, etc., and achieve the effects of small operation and maintenance, wide adaptability to working conditions, and stable process operation

Pending Publication Date: 2020-09-01
BEIJING NUOWEI ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main shortcomings of these gas-liquid-solid reaction and circulating gas separation processes and devices are: 1) The process system and devices have a small operating flexibility space, cannot adapt to complex and changeable actual working conditions, and cannot stably reach the design operating load of the process and devices; 2) The separation and purification efficiency of the circulating gas is low, and liquid accumulation and pressure holding in the pipeline occur from time to time, and the long-term operation of the process and equipment is not smooth; 3) The intake of the circulating gas compression unit is obviously filled with liquid, frequent failures, and high operation and maintenance costs; 4 ) high energy consumption and low yield
Although the methanol synthesis system also uses a circular reaction system, the adaptability of the methanol synthesis system to actual working conditions is relatively weak, such as the low efficiency of single-pass and comprehensive separation and purification of the target product, and the circulation gas is easy to carry liquid into the downstream delivery pipeline and compression The equipment causes frequent surge of the recycle gas compressor to be a safety hazard, and a large amount of target products are brought into the synthesis tower by the recycle gas to continuously form a lot of impurities such as paraffin. The production line was forced to stop production for maintenance, resulting in low operating rate of the device, low selectivity of target products, low yield rate, short operating life of the catalyst in the core reaction device, and difficulty in long-term stable operation of the device to reach the designed capacity

Method used

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  • Flexibly configured circular reaction system and circular reaction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] refer to figure 1, the flexible configuration of the circulatory reaction system in this embodiment includes a large circulatory system 100 , an external transport auxiliary system 200 , and a small circulatory system 300 . The large circulation system 100 includes a reaction unit 1, a heat energy recovery unit 2, a large cooling unit 3, a rough temperature adjustment unit 4, a fine temperature adjustment unit 5, a main separation unit 6, a circulation separation unit 7, a circulation gas compression unit 8, and a small circulation cooling unit. Unit 9. The external transportation auxiliary system 200 includes a dissolved gas recovery unit 10 and a residual liquid collection unit 11 . The large circulation system 100 also includes a small circulation system 300. The small circulation system 300 is composed of the main separation unit 6, the circulation separation unit 7, the cycle gas compression unit 8 and the small circulation cooling unit 9 in the above-mentioned la...

Embodiment 2

[0091] The cyclic reaction system with flexible configuration in this embodiment, on the basis of Example 1, can be aimed at another cyclic reaction process, the reaction release stream from the rough temperature adjustment unit 4 has only one-way transport, and at this time the first A rough temperature-adjusted discharge switching valve 451 sends the reaction release stream to the fine temperature-adjusted unit 5; at the same time, the second coarse temperature-regulated discharge switch valve 461 and the third coarse temperature-regulated discharge switch valve 471 are closed. The reaction discharge stream that comes out from the fine temperature adjustment unit 5 has only one-way delivery, and now the first fine temperature adjustment discharge switching valve 561 is opened so that the reaction release stream is sent to the main separation unit 6; simultaneously, the second fine temperature adjustment is closed. Outlet switching valve 571.

[0092] The stream output from t...

Embodiment 3

[0096] The cyclic reaction system with flexible configuration in this embodiment, on the basis of Example 1, can aim at another cyclic reaction process, the release stream from the rough temperature adjustment unit 4 can only be transported in a single channel, and the first rough adjustment can be started The temperature discharge switching valve 451 allows the released stream to be sent to the fine temperature adjustment unit 5, and at the same time closes the second coarse temperature regulation discharge switching valve 461 and the third coarse temperature regulation discharge switching valve 471.

[0097] The reaction release stream from the fine temperature adjustment unit 5 is transported in two ways at the same time: the first road, the first fine temperature adjustment discharge switching valve 561 is opened so that the reaction release stream is sent to the main separation unit 6; the second road, Open the second finely adjusted temperature discharge switching valve 5...

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Abstract

The invention discloses a flexibly configured circular reaction system and a circular reaction process, and belongs to the technical field of chemical engineering. The reaction system comprises a reaction unit, a cooling unit, a separation unit, a circulating gas compression unit and a small circulating cooling unit, an outlet of the circulating gas compression unit is connected with inlets of thereaction unit and the small circulating cooling unit, the separation unit comprises a main separation unit and a circulating separation unit which are connected in sequence, inlets of the main separation unit and the circulating separation unit are both connected with an outlet of the cooling unit and an outlet of the small circulating cooling unit, and outlets of the main separation unit and thecirculating separation unit are both connected with an inlet of the circulating gas compression unit; and an outlet of the circulating separation unit is connected with an inlet of the main separation unit. The system and the process can adapt to flexible operation under various working conditions such as environment temperature winter and summer weather conversion, separation unit online switching and online maintenance and device pressure production peak regulation operation, and are high in adaptability, high in yield, low in energy consumption, low in maintenance cost, few in potential safety hazard, economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, and more specifically, relates to a flexible configuration cyclic reaction system and a cyclic reaction process. Background technique [0002] Gas-liquid-solid reaction technology and related equipment are widely used in petrochemical, coal chemical, natural gas chemical, fine chemical and pharmaceutical fields. Gas-liquid-solid reaction refers to the reaction in which there are three different phase states of gas, liquid and solid at the same time during the reaction process. Usually, gas-liquid-solid reaction refers to the catalyst as the solid phase, the reactant as the gas phase, and the product as the gas phase (can be cooling to obtain a liquid phase) or a liquid phase reaction. For example, the process of adding carbon monoxide (CO) to the carbon chain to form carbonyl-containing oil (liquid phase) through gas-liquid-solid reaction of coal and residual oil, the process of syn...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J10/00
CPCB01J10/00B01J19/0013B01J19/0053
Inventor 罗力王芳
Owner BEIJING NUOWEI ENERGY TECH