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A cold shock reactor

A reactor, cold-shock technology, applied in chemical instruments and methods, chemical/physical/physical chemical processes, chemical/physical processes, etc., can solve the problems of large bed pressure drop, flying temperature, low conversion rate of raw materials, etc. , to achieve the effect of reduced bed lamination, short residence time and uniform bed temperature

Active Publication Date: 2019-10-15
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the Chinese patent CN104818065A can suppress the carbon deposition of the catalyst by passing water vapor into the raw material gas, but the disadvantages are that the pressure drop of the bed layer is large, the conversion rate of the raw material is low, and the phenomenon of local "flying temperature" is prone to occur

Method used

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  • A cold shock reactor
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  • A cold shock reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] like figure 1 , figure 2 As shown, the chilled shock reactor adopted in this embodiment includes a pressure-bearing shell 1 with a 1# straight pipe 23 at the upper end and a 2# straight pipe 12 at the lower end, and the bottom of the 1# straight pipe 23 is provided with The first gas distributor 22, the second gas distributor 21 is arranged below the first gas distributor 22, the catalytic reaction zone is provided below the 1# straight pipe 23 and above the 2# straight pipe 12. The catalytic reaction zone includes a sleeve 16 composed of radial micro-reaction channels and a central cylinder 9 filled with a catalyst bed. The sleeve 16 shares the bottom sealing plate 11 and the top sealing plate 3 with the central cylinder 9 . An annular gap 6 is formed between the outer wall of the catalytic reaction zone and the inner wall of the casing 1 . Center tube 9, sleeve 16 are all hollow, as figure 2 shown. The sleeve 16 is provided with 26460 radial micro-reaction chan...

Embodiment 2

[0082] like image 3 , Figure 4 As shown, the reactor in this example is the same as the reactor in Example 1 in terms of shell inner diameter, central cylinder, sleeve and other structural parameters, as well as the arrangement of cooling medium distributors. The difference from Example 1 is that no gas distributor is installed in this example, and the reaction raw material gas enters the reactor from the bottom of the reactor, passes through the central tube, the gap, and the sleeve in turn, enters the annulus, and finally flows from the top of the reactor. Leave the reactor.

[0083] Both the central cylinder 9 and the sleeve adopt a radial micro-reaction channel of a tapered tube. The length of the micro-reaction channel of the tapered tube used is 190mm, the diameter of the inlet of the tapered tube is 12mm, and the diameter of the outlet is 4mm. The total volume of all the tapered tubes It accounts for 56.3% of the total cylinder wall part volume of the central cylind...

Embodiment 3

[0086] like Figure 5 , Figure 6 As shown, the reactor in this example is the same as the reactor in Example 2 in terms of structural parameters such as the inner diameter of the shell, the central tube, the sleeve, and the arrangement of the cooling medium distributor. The difference from Example 2 is that in this example, the sleeve is set to be filled with a conventional catalyst bed.

[0087] The reactor used in this example can also be applied to syngas synthesis of C over Fe-based catalysts. 2 ＝ 、C 3 ＝ and other small molecule alkenes. Reaction process condition is identical with embodiment 2. Compared with Example 2, the obtained reaction results are basically the same in terms of CO conversion rate, service life and bed temperature. The difference is that the bed pressure drop in this example is 3.0kPa, and the amount of active metal Fe used is 47kg. .

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Abstract

The invention discloses a quench-type reactor. The reactor comprises a radial cylindrical sealed pressure-bearing shell (1), a 1# straight pipe (23), a 2# straight pipe (12) and a catalytic reaction zone, wherein the catalytic reaction zone comprises a center cylinder (9) and at least one sleeve (16) arranged outside the center cylinder (9) in a sleeving manner; gaps (8) are formed between the center cylinder (9) and sleeve walls of the sleeve (16) on the innermost layer and between sleeve walls of the adjacent sleeves (16); a plurality of cooling medium distributors (14) are arranged in the gaps (8); the cooling medium distributors (14) are in fluid communication with a cooling medium inlet in the shell (1) through a cooling medium pipeline (2). The reactor is small in usage amount of active ingredients of the catalyst, low in pressure drop and low in bed temperature and avoids a 'temperature runaway' phenomenon.

Description

technical field [0001] The invention relates to a cold shock reactor. Background technique [0002] There are mainly two types of fixed bed reactors, one is axial fixed bed reactor and the other is radial fixed bed reactor. The axial fixed bed reactor is relatively easy to design and process, and simple to operate, but there are problems such as large size of reactor equipment, large pressure drop in the bed layer, prone to local temperature jump, slow heat transfer, low conversion rate, and obvious amplification effect. The radial bed reactor has a large height-to-diameter ratio, a small bed pressure drop, and a short residence time of the reactants in the catalyst bed, but it is difficult to achieve uniform distribution of the reactants in the radial direction, and the production intensity of the unit catalyst bed is low. [0003] In order to overcome the problems of low heat transfer and mass transfer efficiency in traditional chemical industry, microchemical technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/02B01J19/00
Inventor 张旭戴文松蒋荣兴
Owner SINOPEC ENG